Electronic expansion valve with long service life

Abstract

The utility model belongs to the technical field of electronic expansion valves, and particularly relates to a long-life electronic expansion valve which comprises a valve body and a valve seat, the valve body is fixed to the valve seat, a guide pipe is fixedly connected to the side wall of the valve seat, a channel is formed in the bottom face of the valve seat, micropores are formed in the side wall of the channel and communicated with the guide pipe, and the valve seat is fixed to the valve body. A channel is formed in the valve body, a sealing plate is assembled on the inner wall of the channel, a through hole is formed in the top face of the sealing plate, a blocking piece is arranged in the through hole, an elastic piece is arranged in the valve body, a control rod is assembled on the side wall of the elastic piece and connected with the blocking piece, and a connecting piece is arranged on the bottom face of the valve seat. The plugging piece comprises a conical block arranged in the through hole, the conical block abuts against the through hole, the side wall of the conical block is fixedly connected with a plurality of rubber sleeves and metal sleeves, and the rubber sleeves and the metal sleeves are alternately arranged in a sleeving mode; according to the expansion valve, the plugging piece can be conveniently replaced and maintained, the service life of the whole expansion valve is prolonged, and the use cost is reduced.

Description

Technical Field

[0001] This utility model belongs to the technical field of electronic expansion valves, and particularly relates to a long-life electronic expansion valve. Background Art

[0002] With the continuous progress and development of technology, the application field of electronic expansion valves will become more and more extensive. An electronic expansion valve is a commonly used control component in a refrigeration system. It uses the electrical signal generated by the regulated parameter to control the voltage or current applied to the expansion valve, thereby achieving the purpose of regulating the liquid supply.

[0003] However, the plugging member in the expansion valve spool is corroded by liquid for a long time and belongs to an easily damaged component. Many expansion valves often need to replace the whole expansion valve due to the damage of the plugging member, which not only easily shortens the service life of the expansion valve, but also increases the use cost. It is not convenient to replace and maintain the plugging member, and affects its sealing effect. Summary of the Utility Model

[0004] The purpose of this utility model is to provide a long-life electronic expansion valve, which can conveniently replace and maintain the plugging member, extend the overall service life of the expansion valve, and reduce the use cost.

[0005] The technical solution adopted by this utility model is specifically as follows:

[0006] A long-life electronic expansion valve includes a valve body and a valve seat. The valve body is fixed on the valve seat. A guide tube is fixedly connected to the side wall of the valve seat. A channel is opened on the bottom surface of the valve seat. Micro holes are opened on the side wall of the channel, and the micro holes are communicated with the guide tube. A sealing plate is assembled on the inner wall of the channel. A through hole is opened on the top surface of the sealing plate, and a plugging member is arranged in the through hole. An elastic member is arranged in the valve body. A control rod is assembled on the side wall of the elastic member, and the control rod is connected to the plugging member. A connecting member is arranged on the bottom surface of the valve seat.

[0007] The plugging member includes a conical block arranged in the through hole. The conical block abuts against the through hole. A plurality of rubber sleeves and metal sleeves are fixedly connected to the side wall of the conical block, and the rubber sleeves and the metal sleeves are alternately sleeved.

[0008] The bottom end of the conical block is fixedly connected with a hexagonal block, and a hexagonal hole is opened on the bottom surface of the hexagonal block.

[0009] The top end of the conical block is fixedly connected with a screw rod. A threaded hole is opened on the bottom end face of the control rod, and the screw rod is adapted to the threaded hole.

[0010] The connecting member includes an annular groove opened on the bottom of the valve seat. A connecting pipe is threadedly connected in the annular groove. An annular plate is fixedly connected to the side wall of the connecting pipe. A bolt is movably connected to the side wall of the annular plate, and the bolt is threadedly connected to the valve seat. The bottom end of the connecting pipe is fixedly connected with a flange pipe.

[0011] A sealing ring is fixedly connected to the inner wall of the connecting pipe, and the sealing ring abuts against the bottom of the valve seat.

[0012] The technical effect achieved by this utility model is as follows:

[0013] A long-life electronic expansion valve of this utility model, through the mutual cooperation among the valve body, valve seat, control rod, plugging member and connecting assembly, etc., by adding multiple rubber sleeves and metal sleeves on the plugging member, one layer can be regularly removed to facilitate the wear of the rubber sleeves and metal sleeves affecting their sealing performance, so as to achieve the purpose of convenient maintenance and effectively extend the service life of the expansion valve. Description of the Drawings

[0014] Figure 1 is a perspective view of an embodiment of this utility model;

[0015] Figure 2 is a sectional structural schematic diagram of an embodiment of this utility model;

[0016] Figure 3 is a structural schematic diagram of the connecting assembly of an embodiment of this utility model;

[0017] Figure 4 is a perspective view of the plugging member of an embodiment of this utility model;

[0018] Figure 5 is a sectional structural schematic diagram of the plugging member of an embodiment of this utility model;

[0019] Figure 6 is an enlarged view at A in an embodiment of this utility model Figure 2 ;

[0020] Figure 7 is an enlarged view at B in an embodiment of this utility model Figure 2 ;

[0021] In the drawings, the list of components represented by each reference numeral is as follows:

[0022] 1, valve body; 2, valve seat; 3, guide pipe; 4, channel; 5, micropore; 6, sealing plate; 7, control rod; 8, through hole; 9, tapered block; 10, screw; 11, screw hole; 12, rubber sleeve; 13, metal sleeve; 14, hexagonal block; 15, flange pipe; 16, annular groove; 17, connecting pipe; 18, annular plate; 19, bolt; 20, sealing ring. Detailed Embodiments

[0023] In order to make the purpose and advantages of this utility model clearer, the following specifically describes this utility model in conjunction with embodiments. It should be understood that the following text only describes one or several specific implementation manners of this utility model, and does not strictly limit the scope of protection specifically claimed by this utility model.

[0024] As shown Figures 1-7 in the figure, a long-life electronic expansion valve includes a valve body 1 and a valve seat 2. The valve body 1 is fixed on the valve seat 2. A guide pipe 3 is fixedly connected to the side wall of the valve seat 2. A channel 4 is opened on the bottom surface of the valve seat 2. Micro holes 5 are opened on the side wall of the channel 4. The micro holes 5 communicate with the guide pipe 3. Among them, the internal structure of the expansion valve belongs to the prior art, and the specific internal structure thereof will not be described in detail in this solution. A sealing plate 6 is assembled on the inner wall of the channel 4. A through hole 8 is opened on the top surface of the sealing plate 6. A plugging member is arranged in the through hole 8. A resilient member is arranged in the valve body 1. A control rod 7 is assembled on the side wall of the resilient member. The control rod 7 is connected to the plugging member. A connecting member is arranged on the bottom surface of the valve seat 2.

[0025] As shown Figure 4 and Figure 5 in the figure, the plugging member includes a tapered block 9 arranged in the through hole 8. The tapered block 9 abuts against the through hole 8. A plurality of rubber sleeves 12 and metal sleeves 13 are fixedly connected to the side wall of the tapered block 9. The rubber sleeves 12 and the metal sleeves 13 are alternately sleeved.

[0026] Among them, the rubber sleeve 12 is made of any one of polytetrafluoroethylene, fluororubber and polyurethane. Such materials have excellent chemical corrosion resistance and high temperature resistance and are commonly used in high-requirement sealing occasions. Its low friction coefficient makes it suitable for valve core applications that require low friction and low wear;

[0027] The metal sleeve 13 is made of any one of stainless steel, aluminum alloy, copper alloy and titanium alloy, has good mechanical properties, is suitable for valve core applications with high weight requirements, and has excellent strength and corrosion resistance.

[0028] In actual application, the above-mentioned various materials can also be layered on the tapered block 9, and the corresponding plugging materials are exposed for plugging according to the use scenario and the liquid medium.

[0029] As shown Figure 5 in the figure, a hexagonal block 14 is fixedly connected to the bottom end of the tapered block 9. A hexagonal hole is opened on the bottom surface of the hexagonal block 14.

[0030] Among them, the rotation of the hexagonal block 14 can be controlled by a wrench or an internal hexagonal wrench to achieve the effect of convenient disassembly and installation of the tapered block 9, and the flexibility is relatively high.

[0031] As shown Figure 4 and Figure 6 in the figure, a screw rod 10 is fixedly connected to the top end of the tapered block 9. A screw hole 11 is opened on the bottom end face of the control rod 7. The screw rod 10 is adapted to the screw hole 11. The connection method of matching the screw rod 10 and the screw hole 11 has the characteristics of simple structure, good stability and not easy to be corroded, and is suitable for application in the expansion valve.

[0032] As shown Figure 2 andFigure 7 As shown, the connecting piece includes an annular groove 16 opened at the bottom of the valve seat 2. A connecting pipe 17 is threadedly connected in the annular groove 16. An annular plate 18 is fixedly connected to the side wall of the connecting pipe 17. A bolt 19 is movably connected to the side wall of the annular plate 18. The bolt 19 is threadedly connected to the valve seat 2. A flange pipe 15 is fixedly connected to the bottom end of the connecting pipe 17.

[0033] Specifically, by setting the connecting piece, it is convenient to dock with an external pipeline and has good sealing performance. The flange pipe 15 can be selected for embedded installation or flange installation according to the characteristics of the external pipeline, thereby increasing its flexibility.

[0034] As Figure 7 shown, a sealing ring 20 is fixedly connected to the inner wall of the connecting pipe 17, and the sealing ring 20 abuts against the bottom of the valve seat 2. The sealing ring 20 can further increase the sealing effect inside the connecting pipe 17 and avoid phenomena such as leakage or uneven pressure when the pressure inside the connecting pipe 17 is too high.

[0035] The working principle of this utility model is as follows: When the sealing of the plugging piece is poor, the connecting pipe 17 can be disassembled. Then, a wrench is inserted on the hexagonal block 14 and rotated. The conical block 9 can be driven to rotate through the hexagonal block 14. The conical block 9 drives the screw rod 10 to rotate, so that it disengages from the screw hole 11 and releases the fixation of the conical block 9. Then, the conical block 9 is taken out and the surface state of the conical block 9 is checked. If the rubber sleeve 12 or the metal sleeve 13 on its surface is corroded and uneven, a layer of the rubber sleeve 12 or the metal sleeve 13 can be removed to increase the sealing effect of the conical block 9. Then, the conical block 9 is fixed on the control rod 7 by using the hexagonal block 14, effectively extending the service life of the expansion valve.

[0036] The above are only the preferred embodiments of this utility model. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of this utility model, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of this utility model. The structures, devices, and operation methods not specifically described and explained in this utility model, unless otherwise specified and limited, are implemented according to the conventional means in this field.

Claims

1. A long-life electronic expansion valve, characterized in that: It includes a valve body (1) and a valve seat (2). The valve body (1) is fixed on the valve seat (2). A guide pipe (3) is fixedly connected to the side wall of the valve seat (2). A channel (4) is formed in the bottom surface of the valve seat (2). Micro holes (5) are formed in the side wall of the channel (4). The micro holes (5) communicate with the guide pipe (3). A sealing plate (6) is assembled on the inner wall of the channel (4). A through hole (8) is formed in the top surface of the sealing plate (6). A plugging member is arranged in the through hole (8). An elastic member is arranged in the valve body (1). A control rod (7) is assembled on the side wall of the elastic member. The control rod (7) is connected to the plugging member. A connecting member is arranged on the bottom surface of the valve seat (2).

2. The long-life electronic expansion valve according to claim 1, characterized in that: The plugging member includes a conical block (9) arranged in the through hole (8). The conical block (9) abuts against the through hole (8). A plurality of rubber sleeves (12) and metal sleeves (13) are fixedly connected to the side wall of the conical block (9). The rubber sleeves (12) and the metal sleeves (13) are alternately sleeved.

3. The long-life electronic expansion valve according to claim 2, wherein: A hexagonal block (14) is fixedly connected to the bottom end of the conical block (9). A hexagonal hole is formed in the bottom surface of the hexagonal block (14).

4. A long-life electronic expansion valve according to claim 2, characterized in that: A screw rod (10) is fixedly connected to the top end of the conical block (9). A threaded hole (11) is formed in the bottom end face of the control rod (7). The screw rod (10) is adapted to the threaded hole (11).

5. The long-life electronic expansion valve according to claim 1, wherein: The connecting member includes an annular groove (16) formed in the bottom of the valve seat (2). A connecting pipe (17) is threadedly connected in the annular groove (16). An annular plate (18) is fixedly connected to the side wall of the connecting pipe (17). A bolt (19) is movably connected to the side wall of the annular plate (18). The bolt (19) is threadedly connected to the valve seat (2). A flange pipe (15) is fixedly connected to the bottom end of the connecting pipe (17).

6. The long-life electronic expansion valve according to claim 5, wherein: A sealing ring (20) is fixedly connected to the inner wall of the connecting pipe (17). The sealing ring (20) abuts against the bottom of the valve seat (2).

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