Injection assembly, injection pump, and method for supply of additive to a fluid in a pipe

Abstract

An injection assembly configured to supply an additive from a reservoir to a fluid in a pipe has a pipe portion and an injection pump. The injection pump has a linear motor comprising a stator and an armature reciprocatingly driven by the stator, and a pump portion comprising an additive inlet chamber. A piston coupled to the armature is configured to reciprocate in said inlet chamber, thereby alternatingly compressing and decompressing a volume of said inlet chamber, an additive outlet chamber in fluid communication with the pipe portion, and a bypass channel between the inlet and outlet chambers.

Claims

1. An injection assembly configured to supply a predetermined amount of an additive from a reservoir to a fluid in a pipe, the injection assembly comprising: a pipe portion comprising a first end and an opposite second end, which pipe portion is configured to be coupled in line with the pipe; two fluid-tight couplings, arranged to respectively couple the first end and the second end of the pipe portion to the pipe in a fluid-tight manner; and an injection pump comprising: an electromagnetic linear motor comprising a stator and a movable armature that is configured to be driven reciprocatingly with respect to the stator, a pump portion comprising a piston and an additive inlet chamber, wherein the piston is coupled to the armature, and is configured to reciprocate in said additive inlet chamber, thereby, in use, alternatingly compressing and decompressing a volume of said additive inlet chamber with a compression stroke and decompression stroke, and an additive outlet chamber in direct fluid communication with the pipe portion and arranged in fluid communication with the additive inlet chamber; wherein, in use, a first decompression stroke of said piston discharges a predetermined amount of said additive from said reservoir into said additive inlet chamber, a consecutive compression stroke of said piston causes said additive to flow from the additive inlet chamber into the additive outlet chamber, and a consecutive second decompression stroke of said piston causes the additive to be directly injected into the pipe portion from the additive outlet chamber.

2. The injection assembly according to claim 1, wherein at least the electromagnetic linear motor and the pump portion are arranged at an outer side of the pipe portion.

3. The injection assembly according to claim 1, wherein the injection pump further comprises a first non-return valve arranged between the additive inlet chamber and the additive outlet chamber, the first non-return valve being adapted to open during a compression stroke of the piston and to close during a decompression stroke of the piston, such that, in use, a first decompression stroke of said piston, with the first non-return valve closed, discharges a predetermined amount of said additive from said reservoir into said additive inlet chamber, a consecutive compression stroke of said piston, with the first non-return valve opened, causes said additive to flow from the additive inlet chamber, through the first non-return valve, into the additive outlet chamber, and a consecutive second decompression stroke of said piston, with the first non-return valve closed, causes the additive to be directly injected into the pipe portion from the additive outlet chamber.

4. The injection assembly according to claim 1, wherein said additive outlet chamber is fixed adjacent to and at an outer side of the pipe portion, which additive outlet chamber is in fluid communication with said pipe portion via a passage opening in a wall of the pipe portion, wherein the armature of the linear motor is arranged inside said additive outlet chamber and is configured to reciprocate inside said additive outlet chamber, thereby, in use, alternatingly compressing and decompressing a volume of said additive outlet chamber with a compression stroke and a decompression stroke, such that a compression stroke of said armature causes the additive to be directly injected from the additive outlet chamber through the passage opening into the pipe portion.

5. The injection assembly according to claim 1, wherein the linear motor is arranged between the pump portion and the pipe portion, the injection pump being arranged completely outside of the pipe portion.

6. The injection assembly according to claim 4, wherein the piston and the armature are directly coupled by a coupling member, such that when the additive outlet chamber is compressed, the additive inlet chamber is decompressed, and vice versa.

7. The injection assembly according to claim 1, wherein a second non-return valve is arranged between the reservoir and the additive inlet chamber, and wherein the first non-return valve is adapted to close during a compression stroke of the piston and to open during a decompression stroke of the piston.

8. The injection assembly according to claim 4, wherein the armature is covered by a fluid-tight armature cover and the additive outlet chamber is defined by a fluid-tight additive outlet chamber cover, and wherein a bypass channel is defined between the armature cover and the chamber cover.

9. The injection assembly according to claim 1, further comprising a flow sensor provided on the pipe portion and a controller, wherein the flow sensor is configured to measure the mass flow of the fluid inside the pipe portion.

10. The injection assembly according to claim 1, wherein the pipe and the pipe portion have a substantially equal diameter.

11. The injection assembly according to claim 3, wherein the first non-return valve comprises a resilient member, a ball, a seat, and a flow channel through the seat and around the ball, wherein, in a closed state of the first non-return valve, the seat receives the ball, such that the ball and the seat close the flow channel while the ball is pressed onto the seat by the resilient member and wherein, in an open state of the first non-return valve, the ball is moved away from the seat, such that the flow channel emerges between the seat and the ball.

12. The injection assembly according to claim 11, wherein said first non-return valve comprises a mechanical stopping member that restricts the movement of the resilient member in a direction away from the seat.

13. The injection assembly according to claim 11, wherein the seat and/or the resilient member are made from a synthetic rubber.

14. A method for the supply of a predetermined amount of an additive from a reservoir to a fluid in a pipe, using an injection assembly according to claim 1.

15. An injection pump comprising: an electromagnetic linear motor comprising a stator and a movable armature that is configured to be driven reciprocatingly with respect to the stator, a pump portion comprising a piston and an additive inlet chamber, wherein the piston is coupled to the armature, and is configured to reciprocate in said additive inlet chamber, thereby, in use, alternatingly compressing and decompressing a volume of said additive inlet chamber with a compression stroke and decompression stroke, and an additive outlet chamber in direct fluid communication with a pipe portion and arranged in fluid communication with the additive inlet chamber; wherein, in use, a first decompression stroke of said piston discharges a predetermined amount of said additive from a reservoir into said additive inlet chamber, a consecutive compression stroke of said piston causes said additive to flow from the additive inlet chamber into the additive outlet chamber, and a consecutive second decompression stroke of said piston causes the additive to be directly injected into the pipe portion from the additive outlet chamber.

Description

(1) These and other aspects of the invention will be more readily appreciated as the same becomes better understood by reference to the following detailed description and considered in connection with the accompanying drawings in which like reference symbols designate like parts.

(2) FIG. 1 schematically shows a cross-section along a longitudinal axis of a first embodiment of an injection assembly/injection pump according to the invention;

(3) FIG. 2 schematically shows a cross-section along a longitudinal axis of a second embodiment of an injection assembly/injection pump according to the invention, wherein the injection pump is in a downwards position relative to the pipe portion;

(4) FIG. 3 schematically shows a cross-section along a longitudinal axis of the injection assembly/injection pump of FIG. 2, wherein the injection pump is in an upwards position relative to the pipe portion;

(5) FIG. 4A schematically shows an isometric cut-away view of components of a non-return valve according to embodiments of the invention;

(6) FIG. 4B schematically shows cross-sectional view of a non-return valve according to embodiments of the invention, in a closed state thereof;

(7) FIG. 4C schematically shows a cross-sectional view of the non-return valve of FIG. 4B, in an open state thereof.

(8) With reference to FIG. 1, a first embodiment of an injection assembly 100 is shown, the injection assembly 100 being configured to supply a predetermined amount of an additive from a reservoir 12 to a fluid in an existing pipe. The injection assembly 100 comprises a pipe portion 3, two fluid-tight couplings 2, 2″ and an injection pump 20, where it is noted that the invention also relates to the injection pump 20.

(9) The pipe portion 3 comprises a first end 3A and an opposite second end 3B, which pipe portion 3 is configured to be coupled with the existing pipe 1 after a pipe section of said existing pipe 1 having a length similar to the length of the pipe portion 3 has been removed from said existing pipe 1, such that said pipe portion 3 effectively replaces said pipe section 1.

(10) The two fluid-tight couplings 2, 2″ respectively couple the first end 3A and the second end 3B of the pipe portion 3 to the existing pipe 1 in a fluid-tight manner.

(11) The injection pump 20 comprises an electromagnetic linear motor 21, a pump portion 23 comprising a piston 10 and an additive inlet chamber 11, here called pump chamber 11, a coupling member 6, and an additive outlet chamber 24.

(12) The electromagnetic linear motor 21 comprises a stator 4, and a movable armature 5 that is configured to reciprocate with respect to the stator 4. As visible in FIG. 1, the linear motor 21 is arranged at a first outer side 3C of the pipe portion 3, below the pipe portion 3. The pipe portion 3 comprises a first cut-out 9, in which first cut-out 9 the linear motor 21 is arranged and able to reciprocate. More specifically, the first cut-out 9 defines a cylinder (cylindrical space) 8.

(13) The additive outlet chamber 24 is arrangable in direct fluid communication with the pipe portion 3 by lowering said additive outlet chamber 24, as will be explained in more detail below. The additive outlet chamber 24 is further arranged in fluid communication with the pump chamber 11.

(14) In FIG. 1, the armature 5 is shown approximately halfway inside the cylinder 8, in a relatively neutral position. With respect to said neutral position, the armature 5 is able to reciprocate in the cylinder 8 thereby, in use, alternatingly compressing and decompressing a volume of said cylinder 8 with a compression stroke CA and a decompression stroke DA.

(15) The compression stroke CA of the armature 5 is damped by a compression of a fluid, such as a gas or a liquid, in said cylinder 8 before or when a dead centre of said compression stroke CA is reached.

(16) The armature 5 comprises bypass channels 25 and is configured to reciprocate in a cylinder 8, thereby, in use, alternatingly compressing and decompressing a volume of said cylinder 8 with a compression stroke CA and a decompression stroke DA, wherein the bypass channels 25 are sized to damp the compression stroke CA of the armature 5 by a compression of fluid in said cylinder 8 before or when a dead centre of said compression stroke CA is reached.

(17) The piston 10 of the pump portion 23 is configured to reciprocate in the pump chamber 11 of the pump portion, thereby, in use, alternatingly compressing and decompressing a volume of said pump chamber 11 with a compression stroke CP and decompression stroke DP.

(18) As visible, the pump chamber 11 is arranged at a second outer side 3D of the pipe portion 3, above the pipe portion 3, the second outer side 3D being diametrically opposite of the first outer side 3C. The pump chamber 11 is separated from the reservoir 12 with a non-return valve 34. The pipe portion 3 comprises a second cut-out 27, in which second cut-out 27 the piston 10 is arranged and able to reciprocate. More specifically, the pump chamber 11 is associated with the second cut-out 27.

(19) As visible, the piston 10 is arranged in the pump chamber 11. The additive outlet chamber 24 is separated from the pump chamber 11 by the piston 10, the additive outlet chamber 24 being configured to move along with the piston 10, such that, in use, upon a decompression stroke DP of the piston 10 in the pump chamber 11, i.e. upon the piston 10 moving down and towards an internal volume 20 of the pipe section 3, the additive outlet chamber 24 moves into the pipe portion 3, releasing said additive directly in said pipe portion 3.

(20) A non-return valve 35 may be arranged between the pump chamber 11 and the additive outlet chamber 24 and may here be embodied as a dynamic seal that is adapted to open when a pressure on a first side of the seal is larger than a pressure on a second side of the seal, and that is adapted to close when the pressure on the first side of the seal is smaller or equal to the pressure on the first side of the seal. Hence, the non-return valve 35 is adapted to close during a compression stroke of the piston 10 and to open during a decompression stroke of the piston 10.

(21) As visible, the coupling member 6 connects the armature 5 of the linear motor 21 to the piston 10, coupling the motion of the piston 10 and the armature 5 to each other. The coupling member 6 extends through the first cut-outs 9 and the second cut-out 27, and is arranged partially in an internal volume 30 of the pipe portion 3. As visible, the coupling member 6 may be disconnected, thereby separating the pump portion 23 from the linear motor 21.

(22) FIG. 1 hence shows an injection assembly 100 wherein, in use, a first decompression stroke DP of said piston 10 discharges a predetermined amount of said additive from said reservoir 12 into said pump chamber 11, a consecutive compression stroke CP of said piston 10 causes said additive to flow from the pump chamber 11, into the additive outlet chamber 24, and a consecutive second decompression stroke DP of said piston 10 causes the additive to be directly injected into the pipe portion 3 from the additive outlet chamber 24.

(23) As visible, the electromagnetic linear motor 21 and the pump portion 23 are arranged at an outer side of the pipe portion 3.

(24) In other words, FIG. 1 discloses a through-going fluid pipe 1, that are connected with a coupling piece 3 via fluid-tight couplings 2 and 2″ below which the electromagnetic drive is placed, comprising a spool 4 inducing an alternating magnetic force moving back and forward a driver 5 is placed, which is connected to a piston 10 of reciprocating pump device that is mounted at a top of a coupling piece 3 by means of a releasable snap connection 6, which pump device is connected to a reservoir 12 from which the additive is sucked via a tube 12a. In this embodiment, the connector between the magnetic drive 5 and the piston 10 extends through the flow channel, but could also extend through a local widening of the flow channel, whereby the piston and driver that are connected in line with each other would move outside of the stream area, but still in an open direct communication remains between the fluid steam and the exhaust of the piston. The inner side of the cylinder that is surrounded by the spool and the outer side of the magnetic drive 5 are provided with a protecting plastic layer and between that cylinder and the magnetic drive sufficient space is left by determination of the fit in relation to the force of the magnetic drive to sufficiently compensate pressure and vacuum forming in the area 8 in the cylinder below the magnetic drive 5 during the upwards and downwards movement of the magnetic drive 5 for the intended operation and yet leave sufficient resistance to somewhat damp the non-driven deflecting movements of the magnetic driver each time before the dead centre, thereby resisting wear. The piston 10 arranged above the pipe is connected to a reservoir 12 and exhausts the additive into the through-going fluid pipe 10 with a push stroke. Directly before the coupling that connects the two ends of the fluid pipe 1 a mounting device is provided for one or more sensors 14 that communicate with a computer for the measurement of for example the flow speed or temperature or both in the through-going pipe 1, for passage to a calculation program that controls the reciprocating motion of the magnetic driver.

(25) With reference to FIGS. 2 and 3, a second embodiment of an injection assembly 200 is shown, the injection assembly 200 being configured to supply a predetermined amount of an additive from a reservoir 12 to a fluid in an existing pipe. The injection assembly 200 comprises a pipe portion 3, two fluid-tight couplings 2, 2″ and an injection pump 20, where it is noted that the invention also relates to the injection pump. FIG. 2 shows the injection assembly with a pump portion 23 of the injection pump 20 and the armature 5 in a relatively low position, i.e. in a compressed state of the pump portion 23, while FIG. 3 shows the injection assembly with the pump portion 23 of the injection pump 20 and the armature 5 in a relatively high position, i.e. in a decompressed state of the pump portion.

(26) The pipe portion 3 comprises a first end 3A and an opposite second end 3B, which pipe portion 3 is configured to be coupled in line with a pipe, for example with an existing pipe 1 after a pipe section of said existing pipe 1 having a length similar to the length of the pipe portion 3 has been removed from said existing pipe 1, such that said pipe portion 3 effectively replaces said pipe section 1.

(27) The two fluid-tight couplings 2, 2″ respectively couple the first end 3A and the second end 3B of the pipe portion 3 to the existing pipe 1 in a fluid-tight manner.

(28) The injection pump 20 comprises an electromagnetically driven linear motor 21, a pump portion 23 comprising a piston 10 and an additive inlet chamber 11, here also called pump chamber, a coupling member 6, an additive outlet chamber 24, and a non-return valve 35. The first non-return valve 35 is arranged between the pump chamber 11 and the additive outlet chamber 24, adapted to close during a compression stroke of the piston 10 and to open during a decompression stroke of the piston 10.

(29) The electromagnetic linear motor 21 of the injection pump 20 comprises a stator 4, and a movable armature 5 that is configured to reciprocate with respect to the stator 4. As visible, the linear motor 21 is arranged between the pump portion 23 of the injection assembly 200 and the pipe portion 3 of the injection assembly 200, the injection pump 20 being arranged completely outside of the pipe portion 3.

(30) The piston 10 of the pump portion 23 is configured to reciprocate in the pump chamber 11, thereby, in use, alternatingly compressing and decompressing a volume of said pump chamber 11 with a compression stroke CP and decompression stroke DP.

(31) The coupling member 6 of the injection pump 20 connects the armature 5 of the linear motor 21 to the piston 10, coupling the motion of the piston 10 and the armature 5 to each other. Here, the piston 10 and the movable armature 5 are directly coupled, such that when the additive outlet chamber 24 is compressed, the pump chamber 11 is decompressed, and vice versa.

(32) The additive outlet chamber 24 of the injection pump is arranged in direct fluid communication with the pipe portion 3. The additive outlet chamber 24 is stationary arranged adjacent and at an outer side of the pipe portion 3, which additive outlet chamber 24 is in direct fluid communication with said pipe portion 3 via a passage opening 31 in a wall of the pipe portion 3.

(33) As visible, the armature 5 of the linear motor 21 is arranged inside said additive outlet chamber 24 and may be covered by a fluid-tight armature cover 32, wherein the armature 5 is configured to reciprocate inside said additive outlet chamber 24. Upon this reciprocating motion, the armature 5 alternatingly compresses and decompresses a volume of said additive outlet chamber 24 with a compression stroke CA and a decompression stroke DA, such that a compression stroke CA of said armature 5 causes the additive to be directly injected from the additive outlet chamber 24 into the pipe portion 3.

(34) As is visible, the additive outlet chamber 24 is defined by a fluid-tight additive outlet chamber cover 33, and a bypass channel 25 is defined between the armature cover 32 and the chamber cover 33.

(35) The injection assembly 200 further comprises a second non-return valve 34, arranged between the reservoir 12 and the pump chamber 11.

(36) In use, a first decompression stroke DP of said piston 10 while the first non-return valve 35 is closed and the second non-return valve 34 is opened discharges a predetermined amount of said additive from said reservoir 12 into said pump chamber 11, a consecutive compression stroke CP of said piston 10 while the first non-return valve 35 is opened and the second non-return valve 34 is closed causes said additive to flow from the pump chamber 11, through the first non-return valve 35, into the additive outlet chamber 24, and a consecutive second decompression stroke DP of said piston 10 while the first non-return valve 35 is opened again and the second non-return valve 34 is closed again causes the additive to be directly injected into the pipe portion 3 from the additive outlet chamber 24.

(37) More specifically, the operation of the injection assembly 200 may be described with reference to FIGS. 2 and 3, wherein the operation is described starting from a position as shown in FIG. 2. It is however noted that the injection assembly 200 performs a continuous cycle of reciprocating movements or strokes, when operated normally, and that the description of the operation, alternatively, may just as well be started from FIG. 3.

(38) FIG. 2 shows the injection assembly 200 with the piston 10 in the pump chamber 11 in a relatively low position, i.e. a volume of the pump chamber 11 being compressed. The situation depicted in FIG. 2 may show the dead centre of the compression stroke CP of the piston 10. The additive outlet chamber 24, on the other hand, is relatively decompressed; the armature 5 having a relatively low position in the additive outlet chamber 24.

(39) The movements of the armature 5, the coupling member 6, and the piston 10 are all directly coupled and synchronous, such that, when the armature 5 is moved upwards, i.e. towards the wall of the pipe portion 3, the connector 6 and the piston 10 move along with it. Upon moving upwards, the pump chamber 11 is decompressed, and the additive outlet chamber 24 is compressed.

(40) In a normal operative condition, in the situation depicted in FIG. 2, the additive outlet chamber 24 is filled with additive, and the pump chamber 11 is vacant of additive.

(41) When the armature 5 is now moved upwards, the first non-return valve 35 is preferably closed, reducing the volume in the additive outlet chamber 24, and forcing the additive from the additive outlet chamber 24, through the outlet opening 31, into an internal volume 30 of the pipe portion 3.

(42) Simultaneously, the volume of the pump chamber 11 is increased as the piston 10 is moved upwards. When the second non-return valve 34 is now opened, additive is introduced from the reservoir 12 into the pump chamber 11.

(43) Hence, at the end of the upwards movement of the armature 5, which defines both a compression stroke of the armature 5 as well as a decompression stroke CP for the piston 10, a volume of the additive outlet chamber 24 is compressed, vacant of additive, and a volume of the pump chamber 11 is decompressed, filled with additive.

(44) This situation is shown in FIG. 3.

(45) Continuing the stroke cycle, now with reference to FIG. 3, the armature 5 is moved downwards again, i.e. away from the wall of the pipe portion 3. This compresses the pump chamber 11, as the piston 10 is moved into it, reducing the internal volume of the pump chamber 11, and increasing the internal volume of the additive outlet chamber 24 as the armature 5 moves out of it. When now second first non-return valve 34 is closed and the first non-return valve 35 is opened, the increasing pressure inside the pump chamber 11 forces the additive to move out of said pump chamber 11, through the first non-return valve 35, and into the additive outlet chamber 24, which is enlarged as the armature 5 is moving downwards.

(46) When this downwards movement of the armature 5 is completed, the situation shown is FIG. 2 is achieved again, and the stroke cycle is completed.

(47) During the upwards motion of the armature 5, it moves towards the wall of the pipe portion 3. To prevent wear of and/or damage to said wall, preferably at least the reciprocating speed of the armature 5, the minimum volume of the additive outlet chamber 24, the size of the bypass channel 25, and the viscosity of the additive are matched to each other, to damp a compressive stroke CA of the armature 5 near or at its dead centre near the pipe portion 3.

(48) With reference to FIGS. 1-3, it may be observed that the injection assembly further comprises a flow sensor 14 and a controller C, wherein the flow sensor 14 is configured to measure the mass flow of the fluid inside the pipe portion 3, and wherein the controller C is configured to control the reciprocating frequency and/or the stroke length of the armature 5 based on at least a measurement of the flow sensor 14.

(49) It may further be noted with reference to FIGS. 1-3 that the existing pipe 1 and the pipe portion 3 preferably have a substantially equal diameter. This is preferred to minimize the disturbance of the flow volume inside the pipe by the mounting of the injection assembly.

(50) With reference to FIGS. 4A-4C, an embodiment of the non-return valve 34 is shown, wherein FIG. 4A shows an isometric cut-away view of the valve 34, wherein FIG. 4B shows an closed state of the valve 34, where additive is unable to flow or move through the valve 34, and wherein FIG. 4C shows an open state of the valve 34, where additive is able to flow or move through the valve 34.

(51) As can be observed, the non-return valve 34 comprises a resilient member 341, a ball 342, a seat 343, and a flow channel 344 through the seat 343 and around the ball 342, wherein, in a closed state of the valve 34, the seat 343 receives the ball 342, such that the ball 342 and the seat 343 close the flow channel 344 while the ball 342 is pressed onto the seat 343 by the resilient member 341 and wherein, in an open state of the valve 34, the ball 342 is moved away from the seat 343, such that a flow channel 344 emerges between the seat 343 and the ball 342. The resilient member 341 provides a constant downwards force onto the ball 342 when the valve is in a closed state, ensuring a proper closure of the valve 34. Hence, when the valve 34 is in a closed state, the resilient member 341 is tensioned.

(52) Advantageously, the non-return valve 34 further comprises a mechanical stopping member 345 that restricts the movement of the resilient member 341 in a direction away from the seat 343. The seat 343 and/or the resilient member 341 may be made from a synthetic rubber, such as a fluorocarbon elastomer, although the material choice will typically depend on the additive to be injected into the pipe 1 or pipe section 3.

(53) The invention further relates to a method for the supply of a predetermined amount of an additive from a reservoir 12 to a fluid in a pipe 1, 3 using an injection assembly 100 according to the invention and/or an injection pump 20 according to the invention.

(54) As explained above, an injection assembly configured to supply an additive from a reservoir to a fluid in a pipe comprises: a pipe portion, couplings to couple ends of the pipe portion to the pipe; and an injection pump comprising: a linear motor comprising a stator, and an armature that is electromagnetically reciprocatingly driven by the stator, a pump portion comprising a piston and an additive inlet chamber, wherein the piston is coupled to the armature, and is configured to reciprocate in said inlet chamber, thereby alternatingly compressing and decompressing a volume of said inlet chamber, and an additive outlet chamber in fluid communication with the pipe portion; wherein, in use, a first decompression stroke of said piston discharges additive from said reservoir into said inlet chamber, a consecutive compression stroke causes said additive to flow from the inlet chamber, into the outlet chamber, and a second decompression stroke directly injects the additive into the pipe portion from the outlet chamber.

(55) The invention may also be explained as described below in the following clauses: 1. In an existing fluid pipe maze insertable configuration of components for the dosed addition of additives to that fluid pipe maze, characterised in that, the components needed for the dosed addition are united into one coupling piece, that is provided with a known fluid-tight coupling, that allows to connect the two ends of a, for insertion of that coupling piece, interrupted horizontally arranged fluid pipe without narrowing the flow channel. 2. In an existing fluid pipe maze insertable configuration of components for the dosed addition of additives to that fluid pipe maze according to clause 1, characterised in that, one of the components is an electromagnetic linear driven dosage pump, that is connected to the coupling piece in such a way, that the linear connection between magnetic driver and piston of the pump extend through the flow channel or through a sideways widening of said flow channel and that the electromagnetic drive part is preferably placed under the pipe and the pump portion is placed above the pipe such that the exhaust of the piston directly mounds into the flow channel. 3. In an existing fluid pipe maze insertable configuration of components for the dosed addition of additives to that fluid pipe maze according to clause 1 and 2, characterised in that, an arrangement is formed on the coupling piece 3 directly in front of the coupling 2 with the fluid pipe 1 for the releasable mounting of a temperature indicator and/or a flow speed indicator in or against the fluid stream. 4. In an existing fluid pipe maze insertable electromagnetic linear driven reciprocating fluid pump according to clause 2, characterised in that, by determination of the distance between the magnetic driver and the cylinder wall in association with the to be determined force of the electromagnetic driver, at the bottom of the cylinder a resistance is controlled by pressure and vacuum forming, such that said resistance can be overcome by the magnetic driving force and the non-driven movement of the magnetic driver is damped just before the dead centre. 5. In an existing fluid pipe maze insertable electromagnetic linear driven reciprocating fluid pump for the dosed addition of additives to said fluid pipe maze according to clauses 2, 3, and 4, characterised in that, the magnetic driver and the inner side of the cylinder, wherein the magnetic driver is moved back and forth, are dressed with a synthetic material. 6. In an existing fluid pipe maze insertable electromagnetic linear driven reciprocating fluid pump for the dosed addition of additives to said fluid pipe maze according to clauses 2, 3, 4 and 5, characterised in that, the outer diameter of the cylinder of the pump portion and the and the diameter of the magnetic driver 5 are the same and the magnetic driver 5 and the piston 10 are releasably connected to each other and can unitedly, together with the cylinder of the pump portion, be pulled out of the pump device via a fluid-tight closable opening and can be placed back again. 7. In an existing fluid pipe maze insertable electromagnetically driven dosing pump, characterised in that it is inserted into a fluid pipe 2 and 2″ via two couplings and the electromagnetic drive, comprising a spool 4 and a via said spool induced alternating magnetic field up and down moving magnetic driver 5 is placed below the fluid pipe, and a reciprocating pump device 3, coupled between with the piston 10 and magnetic driver to said electromagnetic drive via a decoupleable linear connector 6, is placed above the fluid pipe with the piston 10 and the connecting axis between magnetic driver 5 and the piston 10 extends through the flow channel or also through a local widening of said flow channel and the piston discharges additive that is sucked out of the reservoir with the suction stroke into the through-going flow channel that is coupled via the dosing pump with the push stroke. 8. In an existing fluid pipe maze insertable electromagnetically driven dosing pump according to clause 7, characterised in that it is arranged according to features from clauses 3, 4, 5, and 6.

(56) It is to be understood that the disclosed embodiments are merely exemplary of the invention, which can be embodied in various forms. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the present invention in virtually any appropriately detailed structure. Further, the terms and phrases used herein are not intended to be limiting, but rather, to provide an understandable description of the invention.

(57) The terms “a”/“an”, as used herein, are defined as one or more than one. The term plurality, as used herein, is defined as two or more than two. The term another, as used herein, is defined as at least a second or more. The terms including and/or having, as used herein, are defined as comprising (i.e., open language, not excluding other elements or steps). Any reference signs in the claims should not be construed as limiting the scope of the claims or the invention.

(58) The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.