Damper Adjusting Arrangement

Abstract

A damper adjusting arrangement configured for regulating the flow of a gaseous fluid within a channel (5) of an extractor tubing. The damper adjusting arrangement includes a damper member pivotably arranged in the channel and coupled to a rotary control means of the damper adjusting arrangement. A first member of the rotary control means includes a resilient element, which exhibits a plurality of radially protruding first bulges being configured for engagement with a second member of the rotary control means.

Claims

1. A damper adjusting arrangement configured for regulating the flow of a gaseous fluid within a channel of an extractor tubing, the damper adjusting arrangement comprises a damper member pivotably arranged in the channel and coupled to a rotary control means of the damper adjusting arrangement, wherein a first member of the rotary control means comprises a resilient element, which exhibits a plurality of radially protruding first bulges being configured for engagement with a second member of the rotary control means.

2. The damper adjusting arrangement according to claim 1, wherein the first member comprises a plurality of radially and inwardly protruding first bulges configured for engagement with a second bulge of the second member.

3. The damper adjusting arrangement according to claim 1, wherein the first member comprises steel.

4. The damper adjusting arrangement according to claim 1, wherein the first bulges are formed along at least one imaginary circular arc defined by the radius of the second member.

5. The damper adjusting arrangement according to claim 2, wherein the first member comprises steel.

6. The damper adjusting arrangement according to claim 2, wherein the first bulges are formed along at least one imaginary circular arc defined by the radius of the second member.

7. The damper adjusting arrangement according to claim 3, wherein the first bulges are formed along at least one imaginary circular arc defined by the radius of the second member.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0082] The present invention will now be described by way of examples with references to the accompanying schematic drawings, of which:

[0083] FIG. 1 illustrates an extractor tubing comprising a damper adjusting arrangement according to a first example;

[0084] FIG. 2 illustrates an extractor tubing comprising a damper adjusting arrangement according to a second example;

[0085] FIG. 3 illustrates a damper adjusting arrangement according to a third example;

[0086] FIG. 4 illustrates a damper adjusting arrangement according to a fourth example;

[0087] FIGS. 5a and 5b illustrate a first and second member of a damper adjusting arrangement according to a fifth example;

[0088] FIG. 6 illustrates a damper adjusting arrangement according to a sixth example;

[0089] FIGS. 7a-7b illustrate different types of inwardly facing bulges;

[0090] FIG. 8 illustrates an extractor tubing comprising a damper adjusting arrangement according to a seventh example;

[0091] FIG. 9 illustrates an exemplary first member of a damper adjusting arrangement according to an eight example; and

[0092] FIG. 10 illustrates an exemplary second member of a damper adjusting arrangement according to a ninth example.

DETAILED DESCRIPTION

[0093] Hereinafter, exemplary embodiments of the present invention are described with reference to the accompanying figures, wherein for the sake of clarity and understanding of the invention some details of no importance may be deleted from the drawings.

[0094] FIG. 1 illustrates an extractor tubing 2 comprising a damper adjusting arrangement 1 according to a first example. The extractor tubing 2 is designed for source capturing different gases dust avoiding their expansion in a worksite. A suction fan 3 is coupled to a channel 5 of the extractor tubing 2 at a first end. A hood 7 is mounted to the extractor tubing 2 at a second end. An adjustable tubing joint 9 comprises a pivot mechanism 10 providing that the hood 7 can be pivoted in three-dimension. The damper adjusting arrangement 1 comprises a disc shaped element 11 mounted in the channel 5 and configured to be adjustable in fully open state or in a fully closed state or rotated into a holding position there between.

[0095] The damper adjusting arrangement 1 is held in the adjusted position by means of frictional forces of a friction joint between a first and second member (not shown) to keep the disc shaped element 11 in adjusted and held position relative the centre line CL of the channel 5.

[0096] An operator (not shown) can easily turn a knob 13 coupled to the disc shaped element 11 via the friction joint for adjusting the disc shaped element 11 and regulating the flow of gaseous fluid.

[0097] It is extremely important that the friction joint being rigidly configured, as high rate gaseous fluid flow in the channel 5, which also may have a large diameter, requires robust damper adjusting arrangements.

[0098] The features of the friction join between the first and second member will be further described by examples below.

[0099] FIG. 2 illustrates an extractor tubing 2 comprising a damper adjusting arrangement 1 according to a second example. The damper adjusting arrangement 1 comprises a disc shaped element 11 rotatable arranged in a channel 5 of the extractor tubing 2.

[0100] The damper adjusting arrangement 1 is configured for regulating the flow of a gaseous fluid within the channel 5. The disc shaped element 11 is arranged pivotable arranged together with an axis 12 extending transversely to a centre line CL of the channel 5.

[0101] A knob 13 is positioned exterior the extractor tubing 2 and coupled to the axis 12 for rotating the disc shaped element 11. The axis 12 is supported at each end by a respective bearing 14 arranged in the wall of the extractor tubing 2.

[0102] A rotary control mechanism 15 of the damper adjusting arrangement 1 is arranged to the extractor tubing 2 wall.

[0103] A first member (not shown) of the rotary control mechanism 15 comprising a resilient element (not shown), which exhibits a plurality of inward and radially protruding first bulges being configured for engagement with a second member (not shown) of the rotary control means.

[0104] The inward and in radial direction protruding bulges are configured to engage a plurality of outwardly and in radial direction protruding second bulges of a non-resilient second member.

[0105] The second member is configured to be rotatable arranged and coupled to the damper member for providing a rotary motion of the damper member (the disc shaped element 11).

[0106] The geometry of the first bulges may correspond with the geometry of the second bulges.

[0107] An operator (not shown) will rotate the knob 13 under influence of the rotary control mechanism 15, wherein the first bulges of the resilient element are configured to spring away from the second bulges, when rotating the second member, generating a frictional force between the first and second member.

[0108] A first recess is positioned between two first bulges.

[0109] A second recess is positioned between two second bulges.

[0110] When a second bulge or second bulges being positioned in the first recess or in the respective first recess, the resilient element is in a springs back position and holds the second member in position. In such a way, the operator can adjust the damper member to a desired held position (held in position by the resilient member).

[0111] For example, if he wants to set a full flow of gaseous fluid through the channel 5, he simply turns the knob 13 to a “fully open” mark (not shown).

[0112] For example, if he wants to set the flow of gaseous fluid through the extractor tubing 2 to an “idle position”—state or full closed position, he simply turns the knob 13 to a “closed” mark (not shown).

[0113] The first bulge is spring-biased into engagement with a second recess.

[0114] Due to the sliding contact between the first and second bulge, enhanced friction can be achieved by the spring-biased engagement in a robust way.

[0115] FIG. 3 illustrates a damper adjusting arrangement 1 according to a third example in an exploded view. The damper adjusting arrangement 1 is configured for regulating the flow of a gaseous fluid within a channel 5 of an extractor tubing 2. The damper adjusting arrangement 1 comprises a disc-shaped damper 11 rigidly coupled to a shaft (axis) 12 having square cross-section. The shaft 12 is in turn rigidly coupled to a handle 13. An operator (not shown) turns the handle 13 for rotating the disc-shaped damper 11. A bracket arm 14 configured to hold a pivot mechanism is attached to the extractor tubing 2.

[0116] A first member 21 may be attached to the extractor tubing 2 (e.g. via the bracket arm 14).

[0117] The first member 21 of the damper adjusting arrangement 1 comprises a resilient washer 25, which exhibits a plurality of inwardly protruding first bulges (not shown) being configured for engagement with a second member 23 being rigidly coupled to the shaft 12. The second member 23 comprises a plurality of outwardly protruding second bulges (not shown) configured for engagement with said first bulges.

[0118] A respective recess is positioned between two adjacent bulges and when a respective second bulge is moved into a recess between adjacent first bulges, a portion of the resilient washer carrying the first bulges will springs back and hold the second member 23 in position. In such a way, the operator can rotate the disc-shaped damper 11 into a desired held position (thus held in position by the spring back effect of the resilient member).

[0119] FIG. 4 illustrates a damper adjusting arrangement 1 according to a fourth example. The damper adjusting arrangement 1 is configured for regulating the flow of a gaseous fluid AF within a channel 5 of an extractor tubing 2.

[0120] The damper adjusting arrangement 1 comprises a disc-shaped damper 11 rigidly coupled to a shaft 12 having square cross-section. The shaft 12 is rotatable arranged about an axis extending transverse the centre line of the channel 5 and is rigidly coupled to a knob 13 or wing nut. An operator (not shown) turns the knob 13 for rotating the disc-shaped damper 11 for regulating the flow of a gaseous fluid AF.

[0121] A first member 21 may be attached to the extractor tubing 2 by means of rivets 22. The first member 21 of the damper adjusting arrangement 1 comprises a resilient washer 25, which exhibits a plurality of inwardly protruding first bulges 31 being configured for engagement with second bulges 33 of a second member 23 (e.g. non-resilient engagement wheel or other circular body) rigidly coupled to the shaft 12.

[0122] The plurality of outwardly protruding second bulges 33 being configured for engagement with said first bulges 31.

[0123] The first and second bulges 31, 33 comprise a common width, wherein at least the first bulge 31 and the second bulge 33 being arranged to interact with each other to provide a discrete stepped control of the rotation of the second member 23, wherein one discrete step corresponds to the width of the respective first 31 and second 33 bulge.

[0124] The second member coupled to the disc shaped element 11 and to the knob 13 can thus be rotated in discrete steps, which makes the damper adjusting arrangement 1 easy to use in a controlled way.

[0125] FIGS. 5a and 5b illustrate a first 21 and second 23 member of a damper adjusting arrangement according to a fifth example. The first member 21 comprises a washer-like flat element having a central portion occupied by the second member 23.

[0126] The washer-like flat element may be made of high-strength steel and may comprise a first 71 and a second 73 resilient portion, having inwardly protruding first bulges 31, positioned at opposite sides and on both sides of the second member 23.

[0127] The second member 23 is configured as a wheel-like rotary part having the second bulges 33 that protrude outward and are configured to engage the first bulges 31 of the first member 21. A rotary axis 12 is coupled to the second member 23.

[0128] The first 21 and second 23 member and a handle or knob (not shown), and the rotary axis may constitute a rotary control means 20 (damper adjustment mechanism).

[0129] The pattern and design of the first 31 and second 33 bulges may be of any suitable shape for reaching a robust and reliable rotary control means 20. The respective bulge may be defined as a swelling, a bump, a protrusion, a tooth, a projection, etc.

[0130] However, for example, a smooth wave-like shape may be used for forming the bulges and recesses.

[0131] A first recess 41 is positioned between two first bulges 31. A second recess 43 is positioned between two second bulges 33. The respective recess may be defined as a depression, a cavity, a depth, an indentation, a slot, etc.

[0132] The respective first bulge 31 of the respective first 71 and the second 73 resilient portion may be configured to spring away from the second member 23 (as shown in FIG. 5b) when riding over a corresponding second bulge 33 (during rotation of the second member 23), for subsequently drop down into the second recess 43 of the second member 23, wherein the respective first 71 and the second 73 resilient portion springs back for holding the second member 23 in position. The disc shaped element (not shown) coupled to the second member 23 will thus be held in position for regulating the flow of gaseous fluid in the channel (not shown).

[0133] The first bulges 31 being formed along at least one imaginary arc L1, which may follow an imaginary circle, the centre of which corresponds with the axis of the second member 23.

[0134] Reference 81 in FIG. 5b marks a pair of guide arms configured to guide the first member 21 in proper position relative the second member 23.

[0135] FIG. 6 illustrates a damper adjusting arrangement 1 comprising a rotary control means 20 according to a sixth example. The damper adjusting arrangement 1 is configured for regulating the flow of a gaseous fluid within a channel 5 of an extractor tubing 2. The damper adjusting arrangement 1 comprises a disc-shaped damper 11 rigidly coupled to a shaft 12 and to a handle (not shown).

[0136] A first 21 and second 23 member and the handle and shaft 12 may constitute the rotary control means 20.

[0137] The disc-shaped damper 11 is configured to be rotated by means of the shaft 12 in incremental steps between a fully open state FOS and a fully closed state FCS in said channel 5 of the extractor tubing 2.

[0138] FIGS. 7a-7b illustrate different types of inwardly facing bulges of a first member 21 forming a wave-shaped pattern protruding inwardly toward a second member (not shown).

[0139] FIG. 8 illustrates an extractor tubing comprising a damper adjusting arrangement 1 according to a seventh example. The damper adjusting arrangement 1 is configured for regulating the flow of a gaseous fluid within a channel 5 of an extractor tubing (not shown). The damper adjusting arrangement 1 comprises a damper member 11, which is pivotable arranged in the channel 5 and coupled to a rotary control means 20 mounted to the damper adjusting arrangement 1. A first member 21 of the rotary control means 20 comprises a resilient element 71, which exhibits a plurality of radially outwardly protruding first bulges 31 being configured for engagement with a second member 23 of the rotary control means 20.

[0140] FIG. 9 illustrates an exemplary first member 21 of a damper adjusting arrangement according to an eight example.

[0141] The first member 21 may be formed as an elongated washer-like planar tongue with a centrally positioned open area A. The first member 21 may have a first 91 and second 93 leg connected to a first 101 and a second 103 end portion of the first member 21. The first and second leg 91, 93 each comprises a plurality of inwardly facing first bulges 31 forming a wave-shaped pattern. The first member can be manufactured as a sheet metal pressed component.

[0142] Alternatively, an imaginary central axis X extends through the central open area A and extends perpendicular to the plane of the elongated washer-like planar tongue.

[0143] Alternatively, the first member 21 comprises the first leg 91 connected to or integrally joined to the first 101 and to the second 103 end portion of the first member 21.

[0144] Alternatively, the first member 21 comprises the second leg 93 connected to or integrally joined to the first 101 and the second 103 end portion of the first member.

[0145] Alternatively, the first end portion 101 comprises a first through hole 101′ and the second end portion 103 comprises a second through hole 103′.

[0146] The central open area A is configured to encompass the second member (shown in FIG. 10).

[0147] Alternatively, the first leg 91 comprises a first flexible portion 111 and a second 112 flexible portion, wherein a first plurality 31′ of said first bulges of a first intermediate portion 121 of the first leg 91, is positioned between the first flexible portion 111 and the second 112 flexible portion and being configured to engage the second member.

[0148] Alternatively, the second leg 93 comprises a third flexible portion 113 and a fourth 114 flexible portion, wherein a second plurality 31″ of said first bulges a second intermediate portion 123 of the second leg 93, are positioned between the third flexible portion 113 and the fourth flexible portion 114 and being configured to engage the second member.

[0149] The first, second, third and fourth flexible portion 111, 112, 113, 114 exhibiting various thickness and/or width, wherein a first width w1 is wider than a second width w2, for providing a flexibility and/or a resilience of the resilient element.

[0150] FIG. 10 illustrates an exemplary second member 23 of a damper adjusting arrangement according to a ninth example. A square shaped through-hole is provided for a shaft 12 coupled to a disc-shaped plate rotatable in a channel (not shown) of an extractor tubing and coupled to a handle or knob.

[0151] The perimeter of an outwardly facing edge area 105 of the second member 23 is oriented co-axial with the shaft 12 and is provided with outwardly and radially protruding second bulges 33.

[0152] The present invention is of course not in any way restricted to the preferred examples described above, but many possibilities to modifications, or combinations of the described examples thereof, should be apparent to a person with ordinary skill in the art without departing from the basic idea of the invention as defined in the appended claims.