Length-adjustable adapter device for connecting a system part of a plastics processing system to a pipeline

Abstract

A length-adjustable adapter device (100) for connecting a plastics melt filtering device (200) to a pipeline (300), having at least a housing connection element (10) which has at least one inner flow duct (13) in a pipe extension (12) which is provided with an external thread (14), an adjusting ring element (20) having an internal thread (24) for receiving the external thread (14) of the pipe extension (12) and a line connection element (30) for connecting to the pipeline (300) with a line ring flange (31) and with a pipe extension (32) having an inner flow duct (33). The line ring flange (31) is rotatable in a receiving groove (23) of the adjusting ring element (20) and is fixed in a form-fitting manner against axially acting forces.

Claims

1. A length-adjustable adapter device for connecting a plastics melt filtering device to a pipeline, the adapter device comprising: a housing connection element having at least one first inner flow duct in a first pipe extension having a reduced outside diameter, said first pipe extension having an external thread; an adjusting ring element having an internal thread configured to receive the external thread of the first pipe extension of the housing connection element; and a line connection element configured to connect to the pipeline with a line ring flange and with a second pipe extension having a second inner flow duct, wherein the line ring flange of the line connection element has a multiplicity of passage bores or threaded bores and is rotatable in a receiving groove of the adjusting ring element and is fixed in a form-fitting manner against axially acting forces, wherein the second pipe extension of the line connection element is partially pushed into the at least one first inner flow duct of the housing connection element, wherein the second inner flow duct and the first inner flow duct are configured to overlap, and wherein the adapter device is length-adjustable and configured to have a minimum length when the first and second inner flow ducts have a maximum overlap and a maximum length when the first and second inner flow ducts have a minimum overlap.

2. The adapter device of claim 1, wherein the adjusting ring element has a ring flange with a multiplicity of passage bores or threaded bores.

3. The adapter device of claim 1, wherein the adjusting ring element is formed from two half elements, and wherein the receiving groove for the line ring flange is formed in the plane of separation of the half elements.

4. The adapter device of claim 1, wherein the housing connection element comprises a housing adapter ring with a multiplicity of passage bores or threaded bores.

5. The adapter device of claim 1, wherein the adjustable ring element is configured to be moved in a first direction, such that the internal thread receives more of the external thread of the first pipe extension such that the length of the extension adapter device is decreased, and in a second direction opposite the first direction, such that the internal thread receives less of the external thread of the first pipe extension such that the length of the adapter device is increased.

6. The adapter device of claim 1, wherein the adjustable ring element and the first pipe extension are configured to have a maximum threaded configuration in which either the entirety of the external thread of the first pipe extension is received into the internal thread of the adjustable ring element or the entirety of the internal thread is engaged with the external thread, and wherein the maximum threaded configuration corresponds to the shortest length of the adapter device.

7. The adapter device of claim 1, wherein the adjustable ring element and the first pipe extension are configured to have a minimum threaded configuration in which a predetermined minimum amount of external thread is received in the internal thread, and wherein the minimum threaded configuration corresponds to the longest length of the adapter device.

8. A length-adjustable adapter device for connecting a plastics melt filtering device to a pipeline, the adapter device comprising: a housing connection element having at least one first inner flow duct in a first pipe extension having a reduced outside diameter, said first pipe extension having an external thread; an adjusting ring element having an internal thread configured to receive the external thread of the first pipe extension of the housing connection element; and a line connection element configured to connect to the pipeline with a line ring flange and with a second pipe extension having a second inner flow duct, wherein the line ring flange of the line connection element is rotatable in a receiving groove of the adjusting ring element and is fixed in a form-fitting manner against axially acting forces, wherein the second pipe extension of the line connection element is partially pushed into the at least one first inner flow duct of the housing connection element, wherein the second inner flow duct and the first inner flow duct are configured to overlap, wherein the adapter device is length-adjustable and configured to have a minimum length when the first and second inner flow ducts have a maximum overlap and a maximum length when the first and second inner flow ducts have a minimum overlap, and wherein the adjusting ring element is provided with at least one heating means.

9. The adapter device of claim 8, wherein the at least one heating means is formed by a heater band.

10. The adapter device of claim 8, wherein the adjusting ring element has a ring flange with a multiplicity of passage bores or threaded bores.

11. The adapter device of claim 8, wherein the adjusting ring element is formed from two half elements, and wherein the receiving groove for the line ring flange is formed in the plane of separation of the half elements.

12. The adapter device of claim 8, wherein the housing connection element comprises a housing adapter ring with a multiplicity of passage bores or threaded bores.

13. The adapter device of claim 8, wherein the adjustable ring element is configured to be moved in a first direction, such that the internal thread receives more of the external thread of the first pipe extension such that the length of the extension adapter device is decreased, and in a second direction opposite the first direction, such that the internal thread receives less of the external thread of the first pipe extension such that the length of the adapter device is increased.

14. The adapter device of claim 8, wherein the adjustable ring element and the first pipe extension are configured to have a maximum threaded configuration in which either the entirety of the external thread of the first pipe extension is received into the internal thread of the adjustable ring element or the entirety of the internal thread is engaged with the external thread, and wherein the maximum threaded configuration corresponds to the shortest length of the adapter device.

15. The adapter device of claim 8, wherein the adjustable ring element and the first pipe extension are configured to have a minimum threaded configuration in which a predetermined minimum amount of external thread is received in the internal thread, and wherein the minimum threaded configuration corresponds to the longest length of the adapter device.

Description

(1) The invention is explained in more detail below with reference to the drawings. The drawings show in detail:

(2) FIG. 1 an adapter device according to a first embodiment in a perspective view;

(3) FIG. 2 the adapter device in a lateral view;

(4) FIG. 3 the adapter device in a lateral sectional view;

(5) FIG. 4 a second embodiment of an adapter device in a perspective view, and

(6) FIG. 5 the adapter device according to FIG. 4 in a lateral sectional view.

(7) FIG. 1 shows an adapter device 100 according to a first embodiment with a housing connection element 10, of which the housing adapter ring 11 can be seen here, via which direct screwing to a plastics filtering device can be undertaken.

(8) The other end, which faces the observer in FIG. 1, of the adapter device 100 has a line connection element 30 which has a multiplicity of threaded bores 35 via which the flange of a pipeline can be connected. In the interior, the line connection element 30 has a flow duct 34. The line connection element 30 is surrounded by an adjusting ring element 20 which consists of two half elements, of which the outer half element 21 can be seen here. The half elements are connected to each other via screw connections 25. A heating element 40 surrounds the adjusting ring element 20 and, when required, can bring about heating of the adjusting ring element 20 and, indirectly by the latter, also heating of the enclosed line connection element 30.

(9) On the right-hand side, the lateral view in FIG. 2 shows the housing adapter ring 11 of the housing connection element 10 on the right-hand side and a part of the second half element 22 of the adjusting ring element, which part looks down under the heater band 40. The half element 22 has axial grooves 26 in order to be able to fit a sickle spanner and in order to be able to bring about an axial length adjustment by rotation of the adjusting ring element. A part of the pipe extension 12 of the housing connection element 10 is visible between the half element 22 and the housing adapter ring 11. The front part facing the adjusting ring element 20 is provided with an external thread 14.

(10) The function of the adapter device 100 according to the invention becomes clear in particular from the sectional illustration in FIG. 3. The chain-dotted rectangle on the right-hand side indicates a system part 200 of a plastics processing system, which system part, in this exemplary embodiment, is screwed to the housing adapter ring 11. The pipe extension 12 having the external thread 14 adjoins the housing adapter ring 11. A continuous flow duct 13 is formed in the interior of the housing connection element 10.

(11) The counterpart is formed on the left-hand side by the line connection element 30 which is connected to a flange 300 of a pipeline. It has a recessed receptacle 38 for a centring projection 301 on the flange 300 of the pipeline.

(12) The line connection element 30 likewise has an internal flow duct 33 which merges into the flow duct 13 of the housing connection element 10. The flow duct 33 also passes through a pipe extension 32 which can be pushed in a precisely fitting manner into the flow duct 13. A tapering and re-expanding cross-sectional form is required for the flow duct 33 in order to configure the diameter transition in such a manner that as low flow resistances as possible occur.

(13) The annular flange 31 of the line connection element 30 has threaded bores 35 and is provided on the outer circumference thereof with a step 36 which is accommodated in a receiving groove 23 of the adjusting ring element 20. In order to permit installation, the adjusting ring 20 consists of the half elements 21, 22 mentioned. The groove 23 extends via the plane of separation between the half elements 21, 22 or at least up to the latter. It is therefore possible, by release of the external screw connections 25 (compare FIG. 1), to remove the external half element 21 and then to be able to remove or reinsert the line connection element 30.

(14) In a second embodiment of an adapter device 100, which is illustrated in FIG. 4 in a perspective view from the connection side for the pipeline, the construction substantially corresponds to the first embodiment according to FIGS. 1 to 3. The design of the adjusting ring element 20 and of the heater band 40 differs. Whereas, in the case of the first embodiment of an adapter device 100, the two half elements 21, 22 of the adjusting ring element 20 have the same outside diameter and are surrounded by a common heating element 40, in the case of the second embodiment of an adapter device 100, only the internal, second half element 22 is surrounded by a heater band 40.

(15) The first half element 21 has an enlarged outside diameter such that an outer reference circle for a series of passage bores 28 for screw connections can also be provided thereon. The adapter device 100 is therefore not connected directly via threaded bores to a line connection element 30, but rather via passage or threaded bores 28 which lie on a second, outer reference circle.

(16) The screw connections 25 which can be seen on a central reference circle in FIG. 4 also serve, as in the first embodiment of the adapter device 100, to connect the half elements 21, 22 to each other.

(17) The functioning of the axial adjustability of this adapter device 100 substantially corresponds to that of the first embodiment 100. In this case too, a relative movement between the pipe extension 32 of the line connection element 30 and the pipe extension 12 of the housing connection element 10 can be forcibly brought about via the threaded connection between the adjusting ring 20 and the housing connection element 10. The sole difference is that the screw connection in the outer reference circle 28 has to be released beforehand for the rotation of the adjusting ring element 20.