Comprehensive performance testing device for electromagnetic expansion valve

Abstract

The invention relates to the technical field of electromagnetic expansion valves, in particular to an electromagnetic expansion valve comprehensive performance testing device which comprises a bottom plate, two vertical plates, a valve body fixing seat, an air inlet assembly and an air outlet assembly. The air inlet assembly comprises an air inlet seat and a first driving part; the valve body fixing seat comprises a mounting seat and a clamping and positioning assembly; the clamping and positioning assembly comprises a supporting plate, a first sliding seat, a second sliding seat and a driving assembly; a plurality of sliding grooves and a plurality of protrusions are arranged on the inclined faces of the opposite faces of the first sliding seat and the second sliding seat in a staggered mode. A plurality of supporting faces are arranged on the inclined faces of the protrusions, the multiple supporting faces form a step shape, and the two supporting faces, located at the same height, of the first sliding base and the second sliding base form a clamping positioning groove. Automatic positioning and clamping of the valve body are achieved through the first sliding seat, the second sliding seat and the driving assembly, manual operation is reduced, clamping and positioning grooves of different heights are formed by the stepped supporting faces, the requirement for manually replacing clamping modules is reduced, and the overall testing efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of electromagnetic expansion valves, and in particular to a comprehensive performance testing device for electromagnetic expansion valves. Background Art

[0002] The electromagnetic expansion valve, also known as the electronic expansion valve, adjusts the liquid supply to the evaporator according to a preset program. It adapts to the development requirements of refrigeration mechatronics and has excellent characteristics that thermal expansion valves cannot match. It provides conditions for the intelligent control of the refrigeration system and is a very promising self-controlled energy-saving component.

[0003] At present, when performing performance tests on different products, operators of devices used for electronic expansion valve performance testing need to replace corresponding clamping modules, which results in low test efficiency and is not conducive to large-scale product testing. In addition, too many human factors will also affect the accuracy of the test results. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a comprehensive performance testing device for an electromagnetic expansion valve, which effectively solves the problems in the background technology.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is: a comprehensive performance testing device for an electromagnetic expansion valve, comprising: Base plate; Two vertical plates are vertically arranged on opposite sides of the bottom plate; A valve body fixing seat, arranged between the two vertical plates, for positioning and clamping the valve body; An air intake assembly, disposed between the valve body fixing seat and the vertical plate on one side, comprises an air intake seat and a first driving member for driving the air intake seat to move toward the valve body; An air outlet assembly is arranged on the outer surface of the vertical plate of the valve body fixing seat away from the air inlet assembly; Wherein, the valve body fixing seat includes a mounting seat, and a clamping and positioning assembly arranged on the mounting seat, and the clamping and positioning assembly includes a support plate, a first sliding seat and a second sliding seat arranged on the support plate, and a driving assembly for driving the first sliding seat and the second sliding seat to move closer to or away from each other; The opposing surfaces of the first sliding seat and the second sliding seat are arranged inclined, and a plurality of sliding grooves and a plurality of protrusions are arranged alternately on the inclined surface along the driving direction of the first driving member, and the sliding grooves and the protrusions on the first sliding seat and the second sliding seat are arranged correspondingly; A plurality of supporting surfaces are arranged on the inclined surface of the protrusion, and the plurality of supporting surfaces form a step shape, and the two supporting surfaces of the first sliding seat and the second sliding seat located at the same height form a clamping positioning groove.

[0006] Furthermore, a sliding track is provided on the bottom plate, and the valve body fixing seat is arranged on the sliding track; The first driving member drives the air inlet seat to abut against the valve body, and simultaneously drives the valve body fixing seat to move toward the vertical plate on one side of the air outlet component.

[0007] Furthermore, a sliding plate is provided below the air inlet seat; The sliding plate is slidably arranged on the sliding track to support and drive the air inlet seat to move toward the valve body.

[0008] Furthermore, both sides of the valve body fixing seat and the sliding plate along the sliding direction are provided with sliding guide strips; One end of the sliding guide bar is fixed to the sliding plate, and the other end is provided with a guide groove that cooperates with the guide column on the side of the valve body fixing seat; Wherein, one end of the guide groove facing the valve body fixing seat is open, and a strip-shaped adjustment hole is provided at the connection with the sliding plate.

[0009] Furthermore, the top surface of the mounting seat is provided with a first mounting groove and a second mounting groove; The support plate is arranged in the first mounting groove; The first sliding seat and the second sliding seat are provided with guide holes for the support plate to pass through, and the partial blocks of the first sliding seat and the second sliding seat located below the support plate are embedded in the second mounting groove; Wherein, the oppositely-facing surfaces of the first sliding seat and the second sliding seat are provided with a step surface for supporting the support plate, and at least one needle roller row is provided on the step surface; At least one needle roller row is disposed on the bottom surface of the first sliding seat and the bottom surface of the second sliding seat.

[0010] Furthermore, at least two supporting columns are provided between the two vertical plates.

[0011] Further, the driving assembly includes two screw nut groups, bearings arranged at both ends of the screw nut groups, a transmission member for driving the two screw nut groups to move synchronously, and a second driving member providing a power source for the transmission member; The two screw nut groups are respectively arranged on the first sliding seat and the second sliding seat, and the distal ends are rotatably arranged on the mounting seat through the bearings, and two support frames are arranged on the bottom surface of the middle position of the support plate, and the proximal ends are rotatably arranged on the support frames through the bearings; The transmission member is located on the two support frames, and the proximal ends of the two screw nut groups extend between the two support frames and are connected to the second driving member through the transmission member.

[0012] Further, the first driving member includes a driving cylinder and a connecting portion for connecting the driving cylinder and the air inlet seat; The connecting portion includes a connecting block fixed on the air inlet seat and a connecting head arranged at the end of the driving rod of the driving cylinder; The connecting block is provided with a stepped mounting groove, the opening of the stepped mounting groove is arranged to penetrate upward, and the connecting head is provided with an annular protrusion matched with the stepped mounting groove.

[0013] Further, the gas outlet assembly includes a gas outlet seat arranged on the outer side of the vertical plate away from the valve body; The air outlet seat and the air inlet seat are provided with corresponding air inlet passages and air outlet passages.

[0014] Furthermore, a lateral ventilation seat is provided on the mounting seat; The lateral vent seat and the mounting seat are provided with a matching T-shaped slide groove structure, and a third driving member is provided on the side of the lateral vent seat away from the valve body, and the third driving member drives the lateral vent seat to move toward the valve body.

[0015] The beneficial effects of the present invention are as follows: in the present invention, the first sliding seat, the second sliding seat and the driving assembly work in coordination to achieve automatic positioning and clamping of the valve body, reduce manual operation, reduce the influence of human factors on the test results, and the stepped support surface forms clamping positioning grooves of different heights, so that the test device can adapt to the testing requirements of different products, reduce the need for manual replacement of clamping modules, is suitable for large-scale product testing, and improves the overall test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a structural schematic diagram of a comprehensive performance testing device for an electromagnetic expansion valve according to an embodiment of the present invention; Figure 2 A top view of a comprehensive performance testing device for an electromagnetic expansion valve according to an embodiment of the present invention; Figure 3 It is a front view of a comprehensive performance testing device for an electromagnetic expansion valve according to an embodiment of the present invention; Figure 4 It is a schematic diagram of the installation of the valve body fixing seat and the air intake assembly on the sliding track in an embodiment of the present invention; Figure 5 It is a schematic diagram of the installation of the first sliding seat, the second sliding seat and the support plate in an embodiment of the present invention; Figure 6 It is a schematic diagram of the structure of the driving component in an embodiment of the present invention; Figure 7 This is a schematic diagram of the installation of the driving assembly on the support plate in an embodiment of the present invention; Figure 8 It is a transmission schematic diagram of the second driving assembly and two screw nut groups in an embodiment of the present invention; Fig. 9 Schematic diagram of the internal passages of the air inlet seat and the air outlet seat in the embodiment of the present invention; Fig.10 It is a schematic diagram of the structure of the lateral vent seat and the support plate in an embodiment of the present invention; Fig.11 It is a schematic diagram of the structure of the first sliding seat and the second sliding seat in an embodiment of the present invention; Fig.12 Schematic diagram of the installation of the needle roller row in the embodiment of the present invention.

[0018] 1. Bottom plate; 11. Sliding track; 2. Vertical plate; 3. Valve body fixing seat; 31. Mounting seat; 311. First mounting groove; 312. Second mounting groove; 32. Support plate; 321. Support frame; 33. First sliding seat; 331. Slide groove; 332. Protrusion; 332a. Support surface; 333. Step surface; 334. Needle roller row; 34. Second sliding seat; 35. Drive assembly; 351. Screw nut assembly; 352. Bearing; 353. Transmission member; 354. Second drive member; 4. Air intake assembly; 41. Air intake seat; 411. Air intake passage; 42. First drive member; 421. Drive cylinder; 422. Connecting part; 43. Sliding plate; 5. Air outlet assembly; 51. Air outlet seat; 511. Air outlet passage; 6. Sliding guide strip; 7. Lateral ventilation seat; 8. Third drive member. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0022] like Figures 1 to 12 The electromagnetic expansion valve comprehensive performance test device shown comprises: a bottom plate 1, two vertical plates 2, a valve body fixing seat 3, an air inlet assembly 4 and an air outlet assembly 5, wherein the two vertical plates 2 are vertically arranged on opposite sides of the bottom plate 1; the valve body fixing seat 3 is arranged between the two vertical plates 2, and is used to position and clamp the valve body; the air inlet assembly 4 is arranged between the valve body fixing seat 3 and the vertical plate 2 on one side, and comprises an air inlet seat 41, and a first driving member 42 for driving the air inlet seat 41 to move toward the valve body; the air outlet assembly 5 is arranged on the outer facade of the vertical plate 2 of the valve body fixing seat 3 away from the air inlet assembly 4; Among them, the valve body fixing seat 3 includes a mounting seat 31, and a clamping and positioning assembly arranged on the mounting seat 31, the clamping and positioning assembly includes a support plate 32, a first sliding seat 33 and a second sliding seat 34 arranged on the support plate 32, and a driving assembly 35 for driving the first sliding seat 33 and the second sliding seat 34 to move closer to or away from each other; the relative surfaces of the first sliding seat 33 and the second sliding seat 34 are inclined, and a plurality of slide grooves 331 and a plurality of protrusions 332 are staggeredly arranged on the inclined surface along the driving direction of the first driving member 42, and the slide grooves 331 and the protrusions 332 on the first sliding seat 33 and the second sliding seat 34 are correspondingly arranged; a plurality of supporting surfaces 332a are provided on the inclined surface of the protrusion 332, and the plurality of supporting surfaces 332a form a stepped shape, and the two supporting surfaces 332a of the first sliding seat 33 and the second sliding seat 34 located at the same height form a clamping and positioning groove.

[0023] In the present invention, the first sliding seat 33, the second sliding seat 34 and the driving assembly 35 work together to achieve automatic positioning and clamping of the valve body, reduce manual operation, and reduce the influence of human factors on the test results. The stepped support surface 332a forms clamping positioning grooves of different heights, so that the test device can adapt to the testing requirements of different products, reduce the need for manual replacement of clamping modules, is suitable for large-scale product testing, and improves overall test efficiency.

[0024] In a preferred embodiment of the present invention, a sliding track 11 is provided on the base plate 1, and the valve body fixing seat 3 is arranged on the sliding track 11; the first driving member 42 drives the air inlet seat 41 to abut against the valve body, and simultaneously drives the valve body fixing seat 3 to move toward the vertical plate 2 on the side of the air outlet component 5.

[0025] Through the cooperation of the sliding track 11 and the driving member, the sliding track 11 allows the valve body fixing seat 3 to move flexibly on the bottom plate 1, reducing the need for manual adjustment and alignment, ensuring that the valve body and the air hole of the air outlet component 5 are connected reliably, and improving the adaptability and flexibility of the test device. Preferably, the sliding track 11 adopts a guide rail slider structure.

[0026] Based on the above solution, preferably, a sliding plate 43 is provided under the air inlet seat 41; the sliding plate 43 is slidably provided on the sliding track 11, supporting and driving the air inlet seat 41 to move toward the valve body. The sliding plate 43 moves along the preset sliding track 11, and the position of the air inlet seat 41 can be more accurately controlled, and the position of the air inlet seat 41 can be quickly adjusted to ensure accurate docking between the valve body and the air inlet seat 41, which is essential for accurately testing the performance of the electromagnetic expansion valve, further reducing the test preparation time and improving the test work efficiency.

[0027] As a preferred embodiment of the above, both sides of the valve body fixing seat 3 and the sliding plate 43 along the sliding direction are provided with sliding guide strips 6; one end of the sliding guide strip 6 is fixed on the sliding plate 43, and the other end is provided with a guide groove that cooperates with the guide column on the side of the valve body fixing seat 3; the end of the guide groove facing the valve body fixing seat 3 is open, and a strip-shaped adjustment hole is provided at the connection with the sliding plate 43. The design of the sliding guide strip 6 helps to reduce the creeping phenomenon during low-speed movement, and ensures the precise positioning and stability of the valve body fixing seat 3 and the sliding plate 43 when moving along the sliding direction. This design helps to reduce errors caused by manual adjustment or improper operation, thereby improving the accuracy of the test.

[0028] In a preferred embodiment of the present invention, a first mounting groove 311 and a second mounting groove 312 are provided on the top surface of the mounting seat 31; the support plate 32 is arranged in the first mounting groove 311; the first sliding seat 33 and the second sliding seat 34 are provided with guide holes for the support plate 32 to pass through, and the partial blocks of the first sliding seat 33 and the second sliding seat 34 located below the support plate 32 are embedded in the second mounting groove 312; the oppositely facing surfaces of the first sliding seat 33 and the second sliding seat 34 are provided with a step surface 333, and at least one row of roller needles 334 is provided on the step surface 333; and at least one row of roller needles 334 is provided on the bottom surfaces of the first sliding seat 33 and the second sliding seat 34.

[0029] By setting the needle roller row 334, sliding friction is converted into rolling friction, which reduces the wear of the sliding seat and extends the service life of the sliding seat. In addition, by setting the double-sided needle roller row 334, smooth sliding is ensured to avoid jamming, which helps to improve the continuity and reliability of the test.

[0030] In the present invention, at least two support columns are provided between the two vertical plates 2. The support columns are located between the two vertical plates 2, which can effectively prevent the vertical plates 2 from tilting and enhance the stability of the entire testing device.

[0031] In a preferred embodiment of the present invention, the driving assembly 35 includes two screw nut groups 351, bearings 352 arranged at both ends of the screw nut groups 351, a transmission member 353 for driving the two screw nut groups 351 to move synchronously, and a second driving member 354 that provides a power source for the transmission member 353; the two screw nut groups 351 are respectively arranged on the first sliding seat 33 and the second sliding seat 34, and the distal ends are rotatably arranged on the mounting seat 31 through bearings 352, and two support frames 321 are provided on the bottom surface of the middle position of the support plate 32, and the proximal ends are rotatably arranged on the support frames 321 through bearings 352; the transmission member 353 is located on the two support frames 321, and the proximal ends of the two screw nut groups 351 extend between the two support frames 321 and are connected to the second driving member 354 through the transmission member 353.

[0032] The second driving member 354 uses the transmission member 353 to synchronize the two screw nut groups 351, so that the first sliding seat 33 and the second sliding seat 34 are moved closer to or farther from each other, forming a clamping positioning groove that meets the valve body. In addition, the second driving member 354 adopts a servo motor, and the transmission member 353 can choose a meshing form of a main gear and two bevel gears, or the second driving member 354 adopts a cylinder or an oil cylinder, and the transmission member 353 can choose a gear rack transmission form. In order to adapt to the sliding of the mounting seat 31, the second driving member 354 is arranged on the side of the mounting seat 31, and the vertical plate 2 is provided with an avoidance hole through which the second driving member 354 passes, so that the second driving member 354 and the mounting seat 31 can move synchronously, ensuring the transmission stability of the transmission member 353.

[0033] The first sliding seat 33 and the second sliding seat 34 are driven by a separate screw nut set 351, and the initial position of the sliding seat on one side can be adjusted separately to change the central clamping position, thereby ensuring that the air inlet and the air outlet correspond to the valve body, thereby improving the practicality of the test device.

[0034] In the preferred embodiment, the first driving member 42 includes a driving cylinder 421 and a connecting portion 422 for connecting the driving cylinder 421 and the air inlet seat 41; the connecting portion 422 includes a connecting block fixed on the air inlet seat 41 and a connecting head arranged at the end of the driving rod of the driving cylinder 421; the connecting block is provided with a stepped mounting groove, the opening of the stepped mounting groove is arranged to pass upward, and the connecting head is provided with an annular protrusion 332 that cooperates with the stepped mounting groove.

[0035] The stepped mounting groove of the connecting portion 422 cooperates with the annular protrusion 332 on the connecting head to provide a floating joint function, which can absorb the "eccentricity" and lack of parallelism (angle) between the driving body and the cylinder, thereby improving the convenience of connection.

[0036] In the preferred embodiment of the present invention, the air outlet assembly 5 includes an air outlet seat 51 arranged on the outer vertical surface of the vertical plate 2 away from the valve body; the air outlet seat 51 and the air inlet seat 41 are provided with corresponding air inlet passages 411 and air outlet passages 511 .

[0037] By setting up independent air inlet passage 411 and air outlet passage 511, it is possible to adapt to different test requirements and conditions, thereby improving the adaptability and flexibility of the test device. By controlling the air inlet and air outlet passage 511, the gas pressure and flow rate during the test can be flexibly adjusted to meet the requirements of different test conditions.

[0038] In order to adapt to the valve body structure of the double valve body, a lateral vent seat 7 is provided on the mounting seat 31; the lateral vent seat 7 and the mounting seat 31 are provided with a matching T-shaped slide groove 331 structure, and a third driving member 8 is provided on the side of the lateral vent seat 7 away from the valve body, and the third driving member 8 drives the lateral vent seat 7 to move toward the valve body. The application of the lateral vent seat 7 is determined according to the valve body structure. When vent holes are provided on both sides of the valve body, two lateral vent seats 7 need to be provided to ensure the real-time performance of the test.

[0039] Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A comprehensive performance test device for electromagnetic expansion valves, characterized in that: include: Base plate; Two vertical plates are vertically arranged on opposite sides of the bottom plate; A valve body fixing seat, arranged between the two vertical plates, for positioning and clamping the valve body; An air intake assembly, disposed between the valve body fixing seat and the vertical plate on one side, comprises an air intake seat and a first driving member for driving the air intake seat to move toward the valve body; An air outlet assembly is arranged on the outer surface of the vertical plate of the valve body fixing seat away from the air inlet assembly; Wherein, the valve body fixing seat includes a mounting seat, and a clamping and positioning assembly arranged on the mounting seat, and the clamping and positioning assembly includes a support plate, a first sliding seat and a second sliding seat arranged on the support plate, and a driving assembly for driving the first sliding seat and the second sliding seat to move closer to or away from each other; The opposing surfaces of the first sliding seat and the second sliding seat are arranged inclined, and a plurality of sliding grooves and a plurality of protrusions are arranged alternately on the inclined surface along the driving direction of the first driving member, and the sliding grooves and the protrusions on the first sliding seat and the second sliding seat are arranged correspondingly; A plurality of supporting surfaces are arranged on the inclined surface of the protrusion, and the plurality of supporting surfaces form a step shape, and the two supporting surfaces of the first sliding seat and the second sliding seat located at the same height form a clamping positioning groove.

2. The electromagnetic expansion valve comprehensive performance testing device according to claim 1, characterized in that: A sliding track is provided on the bottom plate, and the valve body fixing seat is arranged on the sliding track; The first driving member drives the air inlet seat to abut against the valve body, and simultaneously drives the valve body fixing seat to move toward the vertical plate on one side of the air outlet component.

3. The electromagnetic expansion valve comprehensive performance testing device according to claim 2, characterized in that: A sliding plate is arranged below the air inlet seat; The sliding plate is slidably arranged on the sliding track to support and drive the air inlet seat to move toward the valve body.

4. The electromagnetic expansion valve comprehensive performance testing device according to claim 3, characterized in that: Both sides of the valve body fixing seat and the sliding plate along the sliding direction are provided with sliding guide strips; One end of the sliding guide bar is fixed to the sliding plate, and the other end is provided with a guide groove that cooperates with the guide column on the side of the valve body fixing seat; Wherein, one end of the guide groove facing the valve body fixing seat is open, and a strip-shaped adjustment hole is provided at the connection with the sliding plate.

5. The electromagnetic expansion valve comprehensive performance testing device according to claim 1, characterized in that: The top surface of the mounting seat is provided with a first mounting groove and a second mounting groove; The support plate is arranged in the first mounting groove; The first sliding seat and the second sliding seat are provided with guide holes for the support plate to pass through, and the partial blocks of the first sliding seat and the second sliding seat located below the support plate are embedded in the second mounting groove; Wherein, the oppositely-facing surfaces of the first sliding seat and the second sliding seat are provided with a step surface for supporting the support plate, and at least one needle roller row is provided on the step surface; At least one needle roller row is disposed on the bottom surface of the first sliding seat and the bottom surface of the second sliding seat.

6. The electromagnetic expansion valve comprehensive performance testing device according to claim 1, characterized in that: At least two supporting columns are arranged between the two vertical plates.

7. The electromagnetic expansion valve comprehensive performance testing device according to claim 1, characterized in that: The driving assembly includes two screw nut groups, bearings arranged at both ends of the screw nut groups, a transmission member for driving the two screw nut groups to move synchronously, and a second driving member providing a power source for the transmission member; The two screw nut groups are respectively arranged on the first sliding seat and the second sliding seat, and the distal ends are rotatably arranged on the mounting seat through the bearings, and two support frames are arranged on the bottom surface of the middle position of the support plate, and the proximal ends are rotatably arranged on the support frames through the bearings; The transmission member is located on the two support frames, and the proximal ends of the two screw nut groups extend between the two support frames and are connected to the second driving member through the transmission member.

8. The electromagnetic expansion valve comprehensive performance testing device according to claim 1, characterized in that: The first driving member includes a driving cylinder and a connecting portion for connecting the driving cylinder and the air inlet seat; The connecting portion includes a connecting block fixed on the air inlet seat and a connecting head arranged at the end of the driving rod of the driving cylinder; The connecting block is provided with a stepped mounting groove, the opening of the stepped mounting groove is arranged to penetrate upward, and the connecting head is provided with an annular protrusion matched with the stepped mounting groove.

9. The electromagnetic expansion valve comprehensive performance testing device according to claim 1, characterized in that: The gas outlet assembly comprises a gas outlet seat arranged on the outer side of the vertical plate away from the valve body; The air outlet seat and the air inlet seat are provided with corresponding air inlet passages and air outlet passages.

10. The electromagnetic expansion valve comprehensive performance testing device according to claim 1, characterized in that: A lateral ventilation seat is arranged on the mounting seat; The lateral vent seat and the mounting seat are provided with a matching T-shaped slide groove structure, and a third driving member is provided on the side of the lateral vent seat away from the valve body, and the third driving member drives the lateral vent seat to move toward the valve body.

Images