Pre-filter of electromagnetic expansion valve

Abstract

The utility model provides a prefilter of an electromagnetic expansion valve. The prefilter of the electromagnetic expansion valve is characterized in that a connector is installed below a valve body of the electromagnetic expansion valve, the bottom end of the connector is fixedly connected with a discharge pipe, the outer surface of the connector is fixedly connected with a connecting pipe, the other end of the connecting pipe is provided with a filter pipe through a connecting assembly, and the filter pipe is fixedly connected with the discharge pipe. And the other end of the filter pipe is in threaded connection with a sealing cover through an external threaded pipe, and a first sealing ring is installed at the position, close to one end, of the outer surface of the external threaded pipe. According to the pre-filter of the electromagnetic expansion valve, a filtering structure can be installed at an inlet of the electromagnetic expansion valve through the structure, impurities in liquid or gas are filtered in progress and prevented from being directly included in a valve body of the electromagnetic expansion valve, damage of the impurities to parts in the valve body of the electromagnetic expansion valve is reduced, and the service life of the electromagnetic expansion valve is prolonged. And the service life of the electromagnetic expansion valve body is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic expansion valve filtering, in particular to a pre-filter of an electromagnetic expansion valve. Background Art

[0002] The electromagnetic expansion valve adjusts the liquid supply to the evaporator according to a preset program. Because it belongs to the electronic adjustment mode, it is called an electromagnetic expansion valve. It adapts to the development requirements of refrigeration mechatronics and has excellent characteristics that cannot be matched by thermal expansion valves. It provides conditions for the intelligent control of the refrigeration system and is a very promising automatic control energy-saving component.

[0003] The electromagnetic expansion valve mainly consists of two parts: the coil part and the valve body part. The valve body part: the valve body is mainly composed of a stainless steel shell, a magnet rotor, a nut, a screw shaft, a needle valve, a body and a connecting pipe.

[0004] However, general electromagnetic expansion valves lack a filtering structure inside. When using the electromagnetic expansion valve to transport gas or liquid containing impurities, the impurities can easily cause the electromagnetic expansion valve to become clogged, affecting the normal use of the electromagnetic expansion valve and reducing the service life of internal parts.

[0005] Therefore, it is necessary to provide a solenoid expansion valve pre-filter to solve the above technical problems. Utility Model Content

[0006] The utility model provides a pre-filter for an electromagnetic expansion valve, which solves the problem that the electromagnetic expansion valve lacks a filtering structure and is easily clogged by impurities when conveying gas or liquid containing impurities, thereby affecting the conveying and reducing the service life of internal parts of the electromagnetic expansion valve.

[0007] In order to solve the above technical problems, the electromagnetic expansion valve pre-filter provided by the present utility model comprises: an electromagnetic expansion valve body;

[0008] A connector, the connector being installed below the solenoid expansion valve body, the bottom end of the connector being fixedly connected to a discharge pipe, the outer surface of the connector being fixedly connected to a connecting pipe, the other end of the connecting pipe being installed with a filter tube via a connecting assembly, the other end of the filter tube being threadedly connected to a sealing cap via an externally threaded pipe, and a first sealing ring being installed on the outer surface of the externally threaded pipe near one end;

[0009] An internal thread groove is provided on the inner surface of the filter tube at a position at the other end, a second sealing ring is provided inside the internal thread groove, a support ring is fixedly connected to the inside of the filter tube, a filter disc is provided at one end of the support ring, a fluid fan is rotatably connected to the middle position of the other end of the filter disc through a rotating shaft, a connecting rod is installed on the side of the fluid fan close to the filter disc, and a cleaning rod is fixedly connected to the other end of the connecting rod;

[0010] The external threaded tube is fixed to one end of the sealing cover, and the external threaded tube is threadedly connected to the internal threaded groove. The first sealing ring and the second sealing ring both play a sealing role. The other end of the external threaded tube is in contact with the second sealing ring. The filter plate can be pressed against the external threaded tube and the second sealing ring to be clamped on one end of the support ring. The second sealing ring is in contact with one end of the filter plate at the outer surface.

[0011] Preferably, one end of the filter tube and the sealing cover is provided with a through mounting hole, and the other end of the sealing cover is provided with an inlet pipe via a connecting assembly;

[0012] The mounting hole has a certain thickness, please refer to Figure 4 , the other end of the inlet pipe is connected to the conveying pipeline.

[0013] Preferably, the connecting assembly comprises a flange, and a plurality of mounting bolts are installed at one end of the flange near the outer surface;

[0014] The flange is connected to the filter tube and the sealing cover by installing bolts.

[0015] Preferably, the other end of the flange is fixedly connected to a sealing tube, an outer surface of the sealing tube is provided with a mounting groove, and a sealing ring is provided inside the mounting groove;

[0016] The sealing tube is inserted into the interior of the mounting hole.

[0017] Preferably, a discharge port is provided at the bottom of the filter tube, a butt joint is fixedly connected to the bottom of the filter tube, and a spiral track is installed inside the butt joint;

[0018] A thread is provided near the bottom of the outer surface of the butt joint pipe. The positions of the discharge port and the filter disc correspond to each other, and the positions of the butt joint pipe and the discharge port correspond to each other.

[0019] Preferably, the bottom end of the butt joint tube is threadedly connected to a threaded cover, the bottom end of the threaded cover is fixedly connected to a placement tube, and the outer surface of the placement tube is provided with anti-slip grooves;

[0020] The connection between the threaded cap and the butt pipe is sealed with a rubber sealing ring to prevent penetration.

[0021] Compared with the related art, the electromagnetic expansion valve pre-filter provided by the utility model has the following beneficial effects:

[0022] The utility model provides a solenoid expansion valve pre-filter. In order to prevent impurities in the conveyed gas or liquid from directly entering the interior of the solenoid expansion valve, a filter tube is installed at the other end of the connecting pipe of the inlet of the solenoid expansion valve body through a connecting assembly, and a filter disk with a fluid fan is installed inside the filter tube, and a cleaning rod is installed at one end of the fluid fan through a connecting rod. When the cleaning rod rotates synchronously with the fluid fan, impurities on the outer surface of the filter disk can be cleaned. Thereafter, it is only necessary to connect the sealing cover and the filter tube through an external threaded tube, and make the second sealing ring at the other end of the external threaded tube contact with the other end of the filter disk, so that the filter disk can be clamped inside the filter tube. Through this structure, a filtering structure can be installed at the inlet of the solenoid expansion valve to filter impurities in the liquid or gas and prevent them from directly entering the interior of the solenoid expansion valve body, thereby reducing damage to the internal parts of the solenoid expansion valve body by impurities, and helping to improve the service life of the solenoid expansion valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a structural diagram of a first embodiment of the electromagnetic expansion valve pre-filter provided by the utility model;

[0024] Figure 2 Provides a structural diagram of the inlet pipe for the utility model;

[0025] Figure 3 Provided for the utility model Figure 2 An enlarged view of point A is shown;

[0026] Figure 4 Provides a structural schematic diagram of a fluid fan for the utility model;

[0027] Figure 5 This is a structural diagram of a second embodiment of the electromagnetic expansion valve pre-filter provided by the utility model;

[0028] Figure 6 The utility model provides a structural schematic diagram of a spiral track.

[0029] Numbers in the figure: 1. Solenoid expansion valve body, 2. Connecting assembly, 201. Flange, 202. Mounting bolts, 203. Sealing ring, 204. Mounting groove, 205. Sealing pipe, 3. Filter pipe, 4. Inlet pipe, 5. Sealing cover, 6. Connecting pipe, 7. Discharge pipe, 8. Connecting head, 9. Mounting hole, 10. Support ring, 11. Internal thread groove, 12. Cleaning rod, 13. Connecting rod, 14. Fluid fan, 15. First sealing ring, 16. External threaded pipe, 17. Second sealing ring, 18. Filter disc, 19. Placement pipe, 20. Anti-slip groove, 21. Threaded cover, 22. Butt joint, 23. Discharge outlet, 24. Spiral track, 25. Rotating shaft. DETAILED DESCRIPTION

[0030] The present invention will be further described below with reference to the accompanying drawings and implementation examples.

[0031] Please refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 ,in, Figure 1 This is a structural diagram of a first embodiment of the electromagnetic expansion valve pre-filter provided by the utility model; Figure 2 Provides a structural diagram of the inlet pipe for the utility model; Figure 3 Provided for the utility model Figure 2 An enlarged view of point A is shown; Figure 4 The utility model provides a structural diagram of the fluid fan. The electromagnetic expansion valve pre-filter includes: an electromagnetic expansion valve body 1;

[0032] A connector 8 is installed below the solenoid expansion valve body 1. The bottom end of the connector 8 is fixedly connected to the discharge pipe 7. The outer surface of the connector 8 is fixedly connected to the connecting pipe 6. The other end of the connecting pipe 6 is installed with a filter tube 3 through a connecting assembly 2. The other end of the filter tube 3 is threadedly connected to the sealing cap 5 through an externally threaded tube 16. A first sealing ring 15 is installed on the outer surface of the externally threaded tube 16 near one end.

[0033] An internal thread groove 11 is provided on the inner surface of the filter tube 3 at the other end. A second sealing ring 17 is provided inside the internal thread groove 11. A support ring 10 is fixedly connected to the interior of the filter tube 3. A filter disc 18 is provided at one end of the support ring 10. A fluid fan 14 is rotatably connected to the middle position of the other end of the filter disc 18 via a rotating shaft 25. A connecting rod 13 is installed on the side of the fluid fan 14 close to the filter disc 18. The other end of the connecting rod 13 is fixedly connected to the cleaning rod 12.

[0034] The external threaded tube 16 is fixed to one end of the sealing cover 5, and the external threaded tube 16 is threadedly connected to the internal thread groove 11. The first sealing ring 15 and the second sealing ring 17 both play a sealing role. The other end of the external threaded tube 16 contacts the second sealing ring 17. The filter disc 18 can be pressed against the external threaded tube 16 and the second sealing ring 17 to be stuck on one end of the support ring 10. The second sealing ring 17 and one end of the filter disc 18 are located at the outer surface and in contact. The fluid fan 14 rotates under the drive of the fluid, thereby driving the cleaning rod 12 to clean one end of the filter disc 18. The structure and shape of the interior of the filter tube 3 refer to Figure 4 .

[0035] One end of the filter tube 3 and the sealing cover 5 is provided with a through-mounting hole 9, and the other end of the sealing cover 5 is provided with an inlet pipe 4 via a connecting assembly 2;

[0036] The mounting hole 9 has a certain thickness, see Figure 4 , the other end of the inlet pipe 4 is connected to the delivery pipeline.

[0037] The connecting assembly 2 includes a flange 201, and a plurality of mounting bolts 202 are installed at one end of the flange 201 near the outer surface;

[0038] The flange 201 is connected to the filter tube 3 and the sealing cover 5 by means of mounting bolts 202 . Holes threadedly connected to the mounting bolts 202 are provided at the locations where the filter tube 3 , the sealing cover 5 and the flange 201 are connected.

[0039] The other end of the flange 201 is fixedly connected to a sealing tube 205. The outer surface of the sealing tube 205 is provided with a mounting groove 204. The interior of the mounting groove 204 is provided with a sealing ring 203.

[0040] The sealing tube 205 is inserted into the interior of the mounting hole 9 and cooperates with the sealing ring 203 to perform sealing and connecting functions.

[0041] The working principle of the electromagnetic expansion valve pre-filter provided by the utility model is as follows:

[0042] A filter tube 3 is installed at the other end of the connecting pipe 6 at the inlet of the electromagnetic expansion valve body 1 through the connecting assembly 2, and a filter disc 18 with a fluid fan 14 is installed inside the filter tube 3, and a cleaning rod 12 is installed at one end of the fluid fan 14 through the connecting rod 13. When the cleaning rod 12 rotates synchronously with the fluid fan 14, impurities on the outer surface of the filter disc 18 can be cleaned. After that, it is only necessary to connect the sealing cover 5 and the filter tube 3 through the external threaded tube 16, and let the second sealing ring 17 at the other end of the external threaded tube 16 contact the other end of the filter disc 18, so that the filter disc 18 can be stuck in the inside of the filter tube 3. During actual use, the transported liquid or gas enters the inside of the filter tube 3 and drives the fluid fan 14 to rotate by the flow velocity, so that the cleaning rod 12 can be mobilized to perform a circular motion along one end of the filter disc 18. After that, the transported gas or liquid is filtered through the filter disc 18 and transported to the discharge pipe 7 through the electromagnetic expansion valve body 1, and then transported to the corresponding position through the discharge pipe 7.

[0043] Compared with the related art, the electromagnetic expansion valve pre-filter provided by the utility model has the following beneficial effects:

[0044] In order to prevent impurities in the conveyed gas or liquid from directly entering the interior of the electromagnetic expansion valve, a filter tube 3 is installed at the other end of the connecting pipe 6 at the inlet of the electromagnetic expansion valve body 1 through the connecting assembly 2, and a filter disc 18 with a fluid fan 14 is installed inside the filter tube 3, and a cleaning rod 12 is installed at one end of the fluid fan 14 through the connecting rod 13. When the cleaning rod 12 rotates synchronously with the fluid fan 14, impurities on the outer surface of the filter disc 18 can be cleaned. After that, it is only necessary to connect the sealing cover 5 and the filter tube 3 through the external threaded tube 16, and let the second sealing ring 17 at the other end of the external threaded tube 16 contact the other end of the filter disc 18, so that the filter disc 18 can be stuck in the interior of the filter tube 3. Through this structure, a filtering structure can be installed at the inlet of the electromagnetic expansion valve to filter impurities in the liquid or gas to prevent them from directly entering the interior of the electromagnetic expansion valve body 1, reduce the damage of impurities to the internal parts of the electromagnetic expansion valve body 1, and help to improve the service life of the electromagnetic expansion valve body 1.

[0045] Second embodiment

[0046] Please refer to Figure 5-Figure 6 , Figure 5 This is a structural diagram of a second embodiment of the electromagnetic expansion valve pre-filter provided by the utility model; Figure 6 The present invention provides a schematic diagram of the structure of a spiral track. Based on the electromagnetic expansion valve pre-filter provided in the first embodiment of the present invention, the second embodiment of the present invention provides another electromagnetic expansion valve pre-filter. The second embodiment is merely a preferred embodiment of the first embodiment, and implementation of the second embodiment will not affect the independent implementation of the first embodiment.

[0047] Specifically, the electromagnetic expansion valve pre-filter provided in the second embodiment of the present application is different in that a discharge port 23 is provided at the bottom of the filter tube 3, a docking tube 22 is fixedly connected to the bottom of the filter tube 3, and a spiral track 24 is installed inside the docking tube 22;

[0048] A thread is provided on the outer surface of the butt joint 22 near the bottom. The discharge port 23 corresponds to the position of the filter plate 18. The butt joint 22 and the discharge port 23 correspond to each other. The spiral track 24 allows impurities to enter the interior of the placement tube 19 along the track.

[0049] The bottom end of the butt joint pipe 22 is threadedly connected to a threaded cover 21, and the bottom end of the threaded cover 21 is fixedly connected to a placement pipe 19. The outer surface of the placement pipe 19 is provided with anti-slip grooves 20.

[0050] The connection between the threaded cover 21 and the butt-joint pipe 22 is sealed by a rubber sealing ring to prevent leakage, and the anti-slip groove 20 can facilitate the removal of the threaded cover 21.

[0051] Compared with the related art, the electromagnetic expansion valve pre-filter provided by the utility model has the following beneficial effects:

[0052] In order to facilitate the cleaning of impurities filtered inside the filter tube 3, it is only necessary to open a discharge port 23 at the bottom of the filter tube 3, and install the threaded docking tube 22 at the position corresponding to the discharge port 23. After that, it is only necessary to connect the placement tube 19 through the threaded cover 21 and the bottom thread of the docking tube 22. In actual use, the dust cleaned by the cleaning rod 12 will enter the spiral track 24 from the discharge port 23, and then enter the placement tube 19 through the spiral track 24 for storage. The spiral track 24 is assembled to a certain extent to prevent the backflow of impurities that have fallen. In the later stage, the staff only needs to clean the impurities inside the placement tube 19 regularly. This mechanism can facilitate the cleaning of impurities in the filter tube 3, reducing the difficulty of cleaning.

[0053] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A pre-filter for an electromagnetic expansion valve, characterized in that: include: Solenoid expansion valve body; A connector, the connector being installed below the solenoid expansion valve body, the bottom end of the connector being fixedly connected to a discharge pipe, the outer surface of the connector being fixedly connected to a connecting pipe, the other end of the connecting pipe being installed with a filter tube via a connecting assembly, the other end of the filter tube being threadedly connected to a sealing cap via an externally threaded pipe, and a first sealing ring being installed on the outer surface of the externally threaded pipe near one end; An internal thread groove is provided on the inner surface of the filter tube at the other end, a second sealing ring is arranged inside the internal thread groove, a support ring is fixedly connected to the inside of the filter tube, a filter disc is arranged at one end of the support ring, a fluid fan is rotatably connected to the middle position of the other end of the filter disc through a rotating shaft, a connecting rod is installed on the side of the fluid fan close to the filter disc, and a cleaning rod is fixedly connected to the other end of the connecting rod.

2. The electromagnetic expansion valve pre-filter according to claim 1, characterized in that: One end of the filter tube and the sealing cover is provided with a penetrating mounting hole, and the other end of the sealing cover is provided with an inlet pipe via a connecting assembly.

3. The electromagnetic expansion valve pre-filter according to claim 1, characterized in that: The connecting assembly includes a flange, and a plurality of mounting bolts are installed at a position close to the outer surface of one end of the flange.

4. The electromagnetic expansion valve pre-filter according to claim 3, characterized in that: The other end of the flange is fixedly connected with a sealing tube, an outer surface of the sealing tube is provided with a mounting groove, and a sealing ring is provided inside the mounting groove.

5. The electromagnetic expansion valve pre-filter according to claim 1, characterized in that: A discharge port is provided at the bottom of the filter tube, a butt joint is fixedly connected to the bottom of the filter tube, and a spiral track is installed inside the butt joint.

6. The electromagnetic expansion valve pre-filter according to claim 5, characterized in that: The bottom end of the butt-joint pipe is threadedly connected to a threaded cover, the bottom end of the threaded cover is fixedly connected to a placement pipe, and the outer surface of the placement pipe is provided with anti-slip grooves.

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