Testing device for valve pressure detection

Abstract

The invention relates to the technical field of valve testing, in particular to a testing device for valve pressure detection. The device comprises a fixing assembly and a testing assembly arranged on the fixing assembly. In the period that the pressing plates make contact with the hydraulic valve and fix the two ends of the hydraulic valve, the pressing plates are extruded to overcome the elastic force of the first springs to move into the end shafts, so that the inner rings drive the first sliding parts to move, then the first sliding parts drive the second sliding parts in sliding connection with the first sliding parts to move downwards, and the second sliding parts move downwards to drive the containing table to move downwards; the hydraulic valve can be conveniently rotated to adjust the angle during subsequent testing, the driving structure is arranged, when the hydraulic body drives the pressure head to upwards separate from the hydraulic valve shell, the hydraulic valve can be driven to rotate through rotation of the end clamping structure to adjust the angle, and then the hydraulic body drives the pressure head to move downwards to make contact with the hydraulic valve shell. Therefore, the multi-point pressure test of the hydraulic valve shell is realized.

Description

Technical Field

[0001] The invention relates to the technical field of valve testing, in particular to a testing device for valve pressure detection. Background Art

[0002] A hydraulic valve is an automated component operated by pressurized oil. It is controlled by the pressure oil of a pressure regulating valve and is usually used in combination with an electromagnetic pressure regulating valve. It can be used to remotely control the on / off of oil, gas, and water pipeline systems in hydropower stations. Before installing and using the hydraulic valve, its structural strength, pressure resistance, and tightness must be tested to ensure that it can be used safely and reliably in actual work.

[0003] For example, CN212807602U involves a valve pressure testing device, comprising a frame, a hydraulic cylinder is fixedly connected to the top inner surface of the frame, two hydraulic rods are arranged on the lower surface of the hydraulic cylinder, the bottom ends of the two hydraulic rods are fixedly connected to the same mounting plate, a pressure block is fixedly connected to the lower surface of the mounting plate, a buffer pad is fixedly connected to the lower surface of the pressure block, a workbench is fixedly connected to the bottom inner surface of the frame, a placement groove is provided on the upper surface of the workbench, cavities are symmetrically provided inside the workbench, a through groove is provided on the front outer wall of the workbench, and limiting grooves are respectively provided on the upper and lower surfaces of the cavity.

[0004] The valve pressure testing device in this patent fixes the valve inside the placement groove by two fixing plates, and then uses a buffer pad to reduce the pressure of the pressure block on the valve housing, which is not easy to cause serious damage to the housing. However, when inspecting the structural strength of the valve, it is necessary to perform multi-point pressure testing on the housing. The buffer pad of this device will affect the effect of applying pressure to the housing, and the position angle of the housing needs to be manually adjusted to perform multi-point testing, which reduces the test efficiency.

[0005] In order to perform multi-point pressure testing on a valve housing and improve testing efficiency, a testing device for valve pressure detection is proposed. Summary of the invention

[0006] The object of the present invention is to provide a testing device for valve pressure detection to solve the problems raised in the above background technology.

[0007] To achieve the above object, the present invention provides a testing device for valve pressure detection, comprising a fixing component and a testing component arranged on the fixing component; The fixing assembly includes a test bench and a fixing body rotatably connected to the test bench, and the fixing body is used to fix the hydraulic valve; The test assembly includes a pressure testing piece and a hydraulic body for driving the pressure testing piece. The pressure testing piece is used to perform pressure testing on the hydraulic valve. The pressure testing piece is slidably connected to the test bench up and down, and is transmission-connected to the fixed body. When the pressure testing piece moves up along the test bench, it drives the fixed body to rotate and change the angle of the hydraulic valve housing.

[0008] As a further improvement of the present technical solution, the fixed body includes a placement table, an end clamp structure and a rotating shaft structure. The placement table is plugged into and matched with the test table in an upper and lower manner. The end clamp structure includes clamping bodies at both ends and a clamping linkage body connected to the clamping bodies at both ends. The clamping bodies at both ends are connected to the side walls of the test table through the rotating shaft structure. The clamping linkage body is slidably connected to both ends of the placement table. The clamping bodies at both ends drive the placement table to move up and down through the clamping linkage body.

[0009] As a further improvement of the present technical solution, the clamping bodies at both ends include slides located at both ends of the placing table and an end shaft rotatably connected to the top of the slide, the bottom end of the slide is horizontally slidably connected to the test table, one end of the end shaft is plugged in with a pressure plate, the pressure plate is connected to the inner wall of the end shaft through a first spring, the rotating shaft structure includes a connecting shaft rotatably connected to both ends of the test table, a first screw shaft is rotatably connected in the connecting shaft, the other end of the end shaft is plugged in with the connecting shaft, a threaded groove is provided at the other end of the end shaft, and the first screw shaft is threadedly connected to the threaded groove.

[0010] As a further improvement of the present technical solution, the surface of the pressure plate is provided with a bracket passing through the outer wall of the end shaft, and an inner ring is provided on the periphery of the bracket. The clamping linkage body includes a first sliding member and a second sliding member slidably connected to the first sliding member, the inner ring is rotatably connected to the first sliding member, the bottom end of the second sliding member passes through the slide plate, and the bottom end of the second sliding member is slidably connected to the placement table.

[0011] As a further improvement of the present technical solution, the pressure testing part includes a diaphragm connected to the hydraulic body, the two ends of the diaphragm are slidably connected to the inner wall of the test bench up and down, a bottom column is provided in the middle of the bottom of the diaphragm, and a pressure head for testing the structural strength of the hydraulic valve housing is provided at the bottom of the bottom column.

[0012] As a further improvement of the present technical solution, an elastic module is provided at the top of the pressure head, and the elastic module includes a release rod and a plurality of release springs arranged at the top of the pressure head. The top of the pressure head is plugged into and matched with the bottom of the base column through the set release rod, and the pressure head is connected to the bottom of the pressure head through the set release spring.

[0013] As a further improvement of the present technical solution, end plates are provided at both ends of the bottom of the diaphragm, and a connecting handle is plugged into the bottom of the end plate, and the connecting handle is connected to the inner wall of the end plate through a second spring. The fixed body also includes a driving structure, and the driving structure includes a second screw shaft and a driving wheel. The second screw shaft is rotatably connected to the test bench, and the middle part of the driving wheel is rotatably connected to the driving shaft, and the driving shaft is connected to the inner wall of the driving wheel through a volute spring arranged on the surface, one end of the driving shaft is meshed with the bottom end of the second screw shaft, and the second screw shaft is threadedly connected to the diaphragm, and an outer edge disk is provided on the surface of the connecting shaft, the outer wall of the driving wheel is in contact with the outer wall of the outer edge disk, and a guide groove is provided on the side of the outer edge disk, and the bottom end of the connecting handle is located in the guide groove.

[0014] As a further improvement of the technical solution, the guide groove is an "r"-shaped groove with multiple sections connected.

[0015] As a further improvement of the technical solution, a unidirectionally rotating ratchet is provided at the bottom end of the second screw shaft, and the ratchet is engaged with the driving shaft.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. In the test device for valve pressure detection, while the pressure plate contacts and fixes the two ends of the hydraulic valve, the pressure plate is squeezed to overcome the elastic force of the first spring and move inwardly to the end shaft, so that the inner ring drives the first sliding member to move, and then the first sliding member drives the second sliding member slidably connected thereto to move downward, and the downward movement of the second sliding member drives the placement table downward, so that the placement table does not contact the hydraulic valve, which is convenient for rotating the hydraulic valve to adjust the angle during subsequent tests.

[0017] 2. In the test device for valve pressure detection, a slow-release spring is provided. When pressure is applied to the hydraulic valve housing, the slow-release spring is compressed, so that the pressure applied by the pressure head to the housing rises slowly. When the hydraulic body is reset, the slow-release spring releases its elastic force, thereby avoiding structural damage caused by too fast pressure release.

[0018] 3. In the test device for valve pressure detection, a driving structure is provided. When the hydraulic body drives the pressure head upward to separate from the hydraulic valve housing, the hydraulic valve can be driven to rotate to adjust the angle through the rotation of the end clamp structure. The hydraulic body then drives the pressure head downward to contact the hydraulic valve housing, thereby realizing multi-point pressure testing of the hydraulic valve housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a cross-sectional structural diagram of the fixing assembly of the present invention; Figure 3It is a cross-sectional structural diagram of a fixed body of the present invention; Figure 4 It is a cross-sectional exploded view of the end clamp structure of the present invention; Figure 5 It is a cross-sectional view of the rotating shaft structure of the present invention; Figure 6 is a cross-sectional view of the driving structure of the present invention; Figure 7 It is a cross-sectional structural diagram of the test assembly of the present invention; Figure 8 It is a schematic diagram of the movement of the connecting handle of the present invention.

[0020] The meaning of each number in the figure is: 1. Fixing assembly; 11. Test bench; 12. Fixing body; 121. Placing table; 122. End clamp structure; 1221. Slide plate; 1222. End shaft; 1223. Press plate; 1224. Threaded groove; 1225. Inner ring; 1226. First sliding member; 1227. Second sliding member; 123. Rotating shaft structure; 1231. Connecting shaft; 1232. First screw shaft; 1233. Outer edge disk; 1234. Guide groove; 124. Driving structure; 1241. Second screw shaft; 1242. Driving wheel; 1243. Driving shaft; 1244. Volute spring; 1245. Ratchet; 2. Test assembly; 21. Diaphragm; 22. Bottom column; 221. Pressure head; 222. Elastic module; 23. End plate; 231. Connecting handle. DETAILED DESCRIPTION

[0021] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] Embodiment 1: See also Figure 1 , Figure 2 , Figure 7 As shown, the purpose of this embodiment is to provide a test device for valve pressure detection, including a fixing component 1 and a test component 2 arranged on the fixing component 1; The fixing assembly 1 comprises a test bench 11 and a fixing body 12 arranged on the test bench 11 and rotatably connected to the test bench 11, wherein the fixing body 12 is used to fix the hydraulic valve; The test assembly 2 includes a pressure testing piece and a hydraulic body for driving the pressure testing piece. The pressure testing piece is used to perform pressure testing on the hydraulic valve. The pressure testing piece is slidably connected to the test bench 11 up and down, and is transmission-connected to the fixed body 12. After the hydraulic valve is placed on the test bench 11 and fixed by the fixed body 12, the pressure testing piece is driven by the hydraulic body to move up and down along the test bench 11. The pressure testing piece first moves downward to contact and perform pressure testing on the hydraulic valve housing, and then moves upward to detach from the hydraulic valve housing. In the process of the pressure testing piece moving upward along the test bench 11, the pressure testing piece drives the fixed body 12 transmission-connected to it to rotate and change the angle of the hydraulic valve housing, and then the pressure testing piece moves downward to contact the hydraulic valve housing, thereby realizing multi-point pressure testing of the hydraulic valve housing.

[0023] The above structure is disclosed as follows: like Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, first, the hydraulic valve to be tested needs to be fixed. A lifting groove is provided at the bottom of the test bench 11. The fixed body 12 includes a placement table 121, an end clamping structure 122 and a rotating shaft structure 123. The placement table 121 is located in the lifting groove of the test bench 11 and is plugged into and matched with the test bench 11 up and down. The placement table 121 is used to carry the hydraulic valve. The end clamping structure 122 includes clamping bodies at both ends and a clamping linkage body connected to the clamping bodies at both ends. The clamping bodies at both ends are connected to the side wall of the test bench 11 through the rotating shaft structure 123. The clamping linkage body and the placement table 121 are connected to each other. The two ends of the platform 121 are slidably connected, and the clamping bodies at both ends drive the placement platform 121 to move up and down through the clamping linkage body. After the hydraulic valve is placed on the placement platform 121, the two ends of the hydraulic valve are contacted and fixed by the clamping bodies at both ends. In the process of fixing the hydraulic valve by the clamping bodies at both ends, the clamping bodies at both ends and the hydraulic valve are squeezed mutually, so that the clamping bodies at both ends drive the clamping linkage body, and then drive the placement platform 121 to move downward through the clamping linkage body, so that the placement platform 121 does not contact the hydraulic valve, thereby avoiding interference of the placement platform 121 during subsequent tests.

[0024] The structures of the placement table 121, the clamping bodies at both ends, and the clamping linkage body are disclosed: The clamping bodies at both ends include slide plates 1221 located at both ends of the placement table 121 and an end shaft 1222 rotatably connected to the top of the slide plate 1221. The bottom end of the slide plate 1221 is horizontally slidably connected to the top of the lifting slot of the test table 11. One end of the end shaft 1222 is plugged with a pressing plate 1223. The pressing plate 1223 is connected to the inner wall of the end shaft 1222 through a first spring. The rotating shaft structure 123 includes a connecting shaft 1231 rotatably connected to both ends of the test table 11. A first screw shaft 1232 is rotatably connected inside the connecting shaft 1231. The other end of the end shaft 1222 is plugged into the connecting shaft 1231, and a threaded groove 1224 is provided at the other end of the end shaft 1222. One end of the first screw shaft 1232 is located in the threaded groove 1224 and is threadedly connected to the threaded groove 1224. After the hydraulic valve is placed on the placement table 121, the end shaft 1222 threadedly connected to it is driven to move by rotating the first screw shaft 1232, so that the end shaft 1222 drives the slide plate 1221 to slide horizontally along the test bench 11 until the pressure plate 1223 contacts and clamps the two ends of the hydraulic valve.

[0025] The surface of the pressure plate 1223 is provided with a bracket passing through the outer wall of the end shaft 1222, and an inner ring 1225 is provided on the periphery of the bracket. The inner ring 1225 is a circular ring with an annular protrusion on the outer wall. The clamping linkage includes a first sliding member 1226 and a second sliding member 1227 slidably connected to the bottom end of the first sliding member 1226. The first sliding member 1226 is a partial annular structure with a groove on the inner wall. The annular protrusion of the inner ring 1225 is stuck in the groove of the first sliding member 1226. The inner ring 1225 is rotatably connected to the first sliding member 1226. Extension frames are provided at both ends of the placement table 121. The bottom end of the second sliding member 1227 The slide plate 1221 passes through the extension frame, and the bottom end of the second sliding member 1227 is slidably connected to the placement table 121. During the period when the pressure plate 1223 contacts and fixes the two ends of the hydraulic valve, the pressure plate 1223 is squeezed to overcome the elastic force of the first spring and move toward the end shaft 1222, so that the inner ring 1225 drives the first sliding member 1226 to move, and then the first sliding member 1226 drives the second sliding member 1227 slidably connected to it to move downward, and the second sliding member 1227 moves downward and drives the placement table 121 downward, so that the placement table 121 is not in contact with the hydraulic valve, which is convenient for rotating the hydraulic valve to adjust the angle during subsequent tests.

[0026] Embodiment 2: like Figure 7As shown, after the hydraulic valve is fixed, it is necessary to perform a structural strength test on the hydraulic valve housing. The pressure test piece includes a diaphragm 21 connected to the hydraulic body. Both ends of the diaphragm 21 are slidably connected to the inner wall of the test bench 11 up and down. A bottom column 22 is provided in the middle of the bottom of the diaphragm 21. A pressure head 221 for testing the structural strength of the hydraulic valve housing is provided at the bottom of the bottom column 22. The hydraulic body drives the diaphragm 21 to move downward along the test bench 11 until the pressure head 221 contacts the hydraulic valve housing, and pressure is applied to the hydraulic valve housing to perform a structural strength test. After the structural strength test is completed, the hydraulic body is reset to drive the pressure head 221 to reset and detach from the surface of the hydraulic valve housing. Due to excessive pressure release, The structure may be damaged due to stress release, so an elastic module 222 is provided on the top of the pressure head 221. The elastic module 222 includes a release rod and a plurality of release springs arranged on the top of the pressure head 221. The top of the pressure head 221 is plugged into and matched with the bottom of the bottom column 22 through the release rod, and the pressure head 221 is connected to the bottom of the pressure head 221 through the release spring. By setting the release spring, when pressure is applied to the hydraulic valve housing, the release spring is compressed, so that the pressure applied by the pressure head 221 to the housing rises slowly. When the hydraulic body is reset, the release spring releases its elastic force, thereby avoiding the problem of structural damage caused by too fast pressure release.

[0027] like Figure 5 , Figure 6 , Figure 7 As shown, after completing the structural strength test of one point on the surface of the hydraulic valve housing, it is necessary to adjust the angle of the hydraulic valve to achieve pressure testing of other points on the surface of the housing. End plates 23 are provided at both ends of the bottom of the diaphragm 21. A connecting handle 231 is plugged into the bottom of the end plate 23. The connecting handle 231 is connected to the inner wall of the end plate 23 through a second spring. The fixed body 12 also includes a driving structure 124. The driving structure 124 includes a second screw shaft 1241 and a driving wheel 1242. The second screw shaft 1241 is provided in the test bench 11 and is rotatably connected to the test bench 11. The middle part of the driving wheel 1242 is rotatably connected to the driving shaft 1243. The shaft 1243 is connected to the inner wall of the driving wheel 1242 through the volute spring 1244 arranged on the surface. One end of the driving shaft 1243 is meshed with the bottom end of the second screw shaft 1241. The top end of the second screw shaft 1241 passes through the diaphragm 21 and is threadedly connected to the diaphragm 21. An outer edge disk 1233 is arranged on the surface of the connecting shaft 1231. The outer wall of the driving wheel 1242 contacts the outer wall of the outer edge disk 1233. A guide groove 1234 is arranged on the side of the outer edge disk 1233. The bottom end of the connecting handle 231 is located in the guide groove 1234. The guide groove 1234 is an "r"-shaped groove that is connected in multiple sections. When the hydraulic body drives the pressure head 221 to contact the hydraulic valve housing, as shown in FIG. Figure 8As shown by the solid arrow a, the diaphragm 21 slides downward and drives the second screw shaft 1241 threadedly connected thereto to rotate. At this time, since the bottom end of the connecting handle 231 moves to the bottom end of the "r"-shaped groove in the guide groove 1234, the outer edge disk 1233 is stuck and cannot rotate. The driving wheel 1242 in contact with the surface of the outer edge disk 1233 is also unable to rotate. The driving shaft 1243 meshing with the second screw shaft 1241 can only drive the volute spring 1244 to contract. When the hydraulic body drives the pressure head 221 away from the hydraulic valve housing, the bottom end of the connecting handle 231 moves up along the "r"-shaped groove of the guide groove 1234 to the inflection point, and under the elastic force of the volute spring 1244, the driving wheel 1242 rotates in the direction indicated by the solid arrow b, driving the outer edge disk 1233 to rotate in the direction indicated by the solid arrow c. The second screw shaft 1241 is provided with a one-way rotating ratchet 1245 at the bottom end, and the ratchet 1245 is meshed with the drive shaft 1243. By providing the one-way rotating ratchet 1245, it is possible to avoid the problem that the second screw shaft 1241 is reversed when the diaphragm 21 moves upward, which affects the rotation of the outer edge disk 1233 by the drive wheel 1242, so that when the hydraulic body drives the pressure head 221 to move upward and separate from the hydraulic valve housing, the hydraulic valve can be driven to rotate to adjust the angle, and the hydraulic body then drives the pressure head 221 to move downward and contact the hydraulic valve housing, thereby realizing multi-point pressure testing of the hydraulic valve housing.

[0028] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A test device for valve pressure detection, characterized in that: It comprises a fixing component (1) and a testing component (2) arranged on the fixing component (1); The fixing assembly (1) comprises a test bench (11) and a fixing body (12) rotatably connected to the test bench (11), wherein the fixing body (12) is used to fix the hydraulic valve; The test assembly (2) comprises a pressure testing piece and a hydraulic body for driving the pressure testing piece. The pressure testing piece is used to perform a pressure test on the hydraulic valve. The pressure testing piece is slidably connected to the test bench (11) up and down. The pressure testing piece is transmission-connected to the fixed body (12). When the pressure testing piece moves upward along the test bench (11), it drives the fixed body (12) to rotate and change the angle of the hydraulic valve housing.

2. The test device for valve pressure detection according to claim 1, characterized in that: The fixed body (12) comprises a placement platform (121), an end clamp structure (122) and a rotating shaft structure (123); the placement platform (121) is plugged into and matched with the test platform (11) in an up-and-down manner; the end clamp structure (122) comprises clamping bodies at both ends and a clamping linkage body connected to the clamping bodies at both ends; the clamping bodies at both ends are connected to the side walls of the test platform (11) via the rotating shaft structure (123); the clamping linkage body is slidably connected to both ends of the placement platform (121); and the clamping bodies at both ends drive the placement platform (121) to move up and down via the clamping linkage body.

3. The test device for valve pressure detection according to claim 2, characterized in that: The clamping bodies at both ends comprise slide plates (1221) located at both ends of the placement platform (121) and an end shaft (1222) rotatably connected to the top of the slide plate (1221); the bottom end of the slide plate (1221) is horizontally slidably connected to the test platform (11); one end of the end shaft (1222) is plugged with a pressure plate (1223); the pressure plate (1223) is connected to the inner wall of the end shaft (1222) via a first spring; the rotating shaft structure (123) comprises a connecting shaft (1231) rotatably connected to both ends of the test platform (11); a first screw shaft (1232) is rotatably connected inside the connecting shaft (1231); the other end of the end shaft (1222) is plugged with the connecting shaft (1231); a threaded groove (1224) is provided at the other end of the end shaft (1222); the first screw shaft (1232) is threadedly connected to the threaded groove (1224).

4. The test device for valve pressure detection according to claim 3, characterized in that: The surface of the pressure plate (1223) is provided with a bracket passing through the outer wall of the end shaft (1222), and the outer periphery of the bracket is provided with an inner ring (1225). The clamping linkage body includes a first sliding member (1226) and a second sliding member (1227) slidably connected to the first sliding member (1226), the inner ring (1225) is rotatably connected to the first sliding member (1226), the bottom end of the second sliding member (1227) passes through the slide plate (1221), and the bottom end of the second sliding member (1227) is slidably connected to the placement table (121).

5. The test device for valve pressure detection according to claim 3, characterized in that: The pressure test piece comprises a diaphragm (21) connected to the hydraulic body, the two ends of the diaphragm (21) being slidably connected to the inner wall of the test bench (11) up and down, a bottom column (22) being provided in the middle of the bottom of the diaphragm (21), and a pressure head (221) for testing the structural strength of the hydraulic valve housing being provided at the bottom of the bottom column (22).

6. The test device for valve pressure detection according to claim 5, characterized in that: An elastic module (222) is provided at the top of the pressure head (221), and the elastic module (222) comprises a release rod and a plurality of release springs arranged at the top of the pressure head (221); the top of the pressure head (221) is plug-fitted with the bottom of the bottom column (22) via the release rod, and the pressure head (221) is connected to the bottom of the pressure head (221) via the release spring.

7. The testing device for valve pressure detection according to claim 5, characterized in that: End plates (23) are provided at both ends of the bottom of the transverse partition (21); a connecting handle (231) is plugged into the bottom of the end plate (23); the connecting handle (231) is connected to the inner wall of the end plate (23) via a second spring; the fixed body (12) further comprises a driving structure (124); the driving structure (124) comprises a second screw shaft (1241) and a driving wheel (1242); the second screw shaft (1241) is rotatably connected to the test bench (11); the middle of the driving wheel (1242) is rotatably connected to a driving shaft (1243); the driving shaft (1243) ) is connected to the inner wall of the driving wheel (1242) through a volute spring (1244) arranged on the surface, one end of the driving shaft (1243) is meshed with the bottom end of the second screw shaft (1241), the second screw shaft (1241) is threadedly connected to the transverse partition (21), an outer edge disk (1233) is provided on the surface of the connecting shaft (1231), the outer wall of the driving wheel (1242) is in contact with the outer wall of the outer edge disk (1233), a guide groove (1234) is provided on the side of the outer edge disk (1233), and the bottom end of the connecting handle (231) is located in the guide groove (1234).

8. The test device for valve pressure detection according to claim 7, characterized in that: The guide groove (1234) is an "R"-shaped groove with multiple interconnected sections.

9. The testing device for valve pressure detection according to claim 7, characterized in that: A unidirectionally rotatable ratchet (1245) is provided at the bottom end of the second screw shaft (1241), and the ratchet (1245) is meshed with the driving shaft (1243).

Images