A valve bore diameter detection device

Abstract

The application belongs to the technical field of valve aperture detection, and particularly discloses a valve aperture detection device, which comprises a detection table, a valve centering clamping mechanism and a self-marking aperture detection mechanism. The valve centering clamping mechanism is arranged on the detection table, and the self-marking aperture detection mechanism is arranged on the detection table. Without any electrical sensing element, the full-range circumferential detection and marking of the valve aperture are realized through the elastic fitting triggering mode.

Description

Technical Field

[0001] This invention belongs to the field of valve orifice diameter detection technology, specifically referring to a valve orifice diameter detection device. Background Technology

[0002] In the field of valve manufacturing and repair, the sealing performance of valves is of paramount importance, and the roundness of the valve orifice (i.e., the roundness and smoothness of the orifice wall) is one of the key indicators affecting sealing performance. If the orifice has defects such as ellipticity, local depressions, or protrusions, it will directly cause the valve to fail to seal completely when closed, leading to media leakage and affecting system safety and efficiency.

[0003] Currently, the inspection of valve orifice roundness largely relies on traditional methods. A common approach is to use calipers, inside micrometers, and other measuring tools to perform multiple manual measurements, estimating roundness error by comparing measurements in different diameter directions. This method is not only cumbersome and inefficient, but also has limited measurement points, failing to reflect the continuous variation of the orifice diameter across the entire circumference. It is prone to missing local defects, and the measurement results are heavily influenced by the operator's experience, making them highly subjective.

[0004] Therefore, there is an urgent need in the field for a valve orifice diameter detection device that can achieve rapid, accurate, comprehensive, automated and non-destructive testing to overcome the above-mentioned deficiencies of the prior art. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, the present invention provides a valve orifice diameter detection device. Without any electrical sensing components, it achieves multiple technical effects of omnidirectional circumferential detection and marking of valve orifice diameter by simply setting an elastic contact trigger.

[0006] The technical solution adopted by this invention is as follows: This invention provides a valve orifice diameter detection device, including a detection platform, a valve centering clamping mechanism, and a self-marking orifice diameter detection mechanism. The valve centering clamping mechanism is disposed on the detection platform, and the self-marking orifice diameter detection mechanism is disposed on the detection platform. The self-marking orifice diameter detection mechanism includes a frame, a self-marking orifice diameter detection component, and a rotating motor. The frame is disposed on the detection platform, the self-marking orifice diameter detection component is rotatably disposed on the frame, and the rotating motor is disposed on the frame. The output end of the rotating motor is connected to the self-marking orifice diameter detection component.

[0007] Furthermore, the self-marking aperture detection component includes an aperture adaptation adjustment device and an aperture detection mark. The aperture adaptation adjustment device is mounted on the frame, and the aperture detection mark is connected to the aperture adaptation adjustment device. The aperture detection mark includes a fixed plate, an aperture wall fit detection component, and an automatic marking component. The fixed plate is connected to the aperture adaptation adjustment device, the aperture wall fit detection component is mounted on the fixed plate, and the automatic marking component is slidably mounted on the fixed plate.

[0008] Preferably, the fixing plate includes a fixing plate, a support plate, and a support locking plate. The fixing plate is connected to the aperture adaptation adjustment device. The support plate is disposed on the fixing plate, the support locking plate is disposed on the fixing plate, and the support locking plate is disposed above the support plate.

[0009] Furthermore, the support locking plate is provided with a sliding groove.

[0010] The hole wall fitting detection component includes a spring, a trigger post, and a fitting detection head. The fixed plate is provided with a trigger hole, the trigger post is telescopically slidably disposed in the trigger hole, one end of the spring is disposed on the fixed plate, and the fitting detection head is connected to the other end of the spring.

[0011] Furthermore, the automatic marking component includes a telescopic marking rod, a marking adjustment rod, a marking pen, and a marking ring. The telescopic marking rod is engaged and slidably disposed in a groove, the marking adjustment rod is disposed on the telescopic marking rod, and the marking pen is connected to the movable end of the marking adjustment rod. The marking ring includes a pull-out support rod, a marking ring, and a support column. The pull-out support rod is disposed on the frame, the marking ring is disposed on the pull-out support rod, the support column is disposed on the aperture adaptation adjustment device, and a limiting groove is provided on the bottom wall of the marking ring. The support column is engaged and slidably disposed in the limiting groove.

[0012] As a further preferred embodiment of the present invention, the aperture adaptation adjustment device includes a height adjustment rod, a fixing block, and an aperture wall fitting adjustment rod. The height adjustment rod is mounted on the frame, the fixing block is connected to the movable end of the height adjustment rod, the aperture wall fitting adjustment rod is mounted on the fixing block, and the support column is mounted on the fixing block.

[0013] Furthermore, the valve centering clamping mechanism includes a linkage clamping device and an adaptive clamping device. The linkage clamping device includes a hydraulic push rod, a linkage rod, a hinged limiting member, a linkage push rod, and a clamping slider. The linkage rod is symmetrically rotated on the testing table. One end of the hydraulic push rod is hinged to one end of one of the linkage push rods, and the other end of the hydraulic push rod is hinged to one end of the other linkage push rod. The hinged limiting member is located on the testing table. One end of the linkage push rod is hinged to the other end of the linkage push rod. The clamping slider is hinged to the other end of the linkage push rod. The clamping slider is engaged and slidably disposed in the testing table.

[0014] The hinged limiting component includes a fixed plate, a fixed post, a limiting ring, an ear plate, and a hinge rod. The fixed plate is disposed on the testing platform, the fixed post is disposed on the bottom wall of the fixed plate, the limiting ring is slidably disposed on the fixed post, the ear plate is symmetrically disposed on the outer circumferential wall of the limiting ring, a connecting plate is provided in the middle part of the linkage rod, one end of the hinge rod is hinged to the ear plate, and the other end of the hinge rod is hinged to the connecting plate.

[0015] Furthermore, the adaptive clamping device includes an adjusting rod, a movable plate, a guide telescopic column, an adaptive spring, and a flexible clamping head. The detection platform is provided with a locking groove. The adjusting rod is rotatably disposed in the locking groove. The adjusting rod is a cylindrical rod with one threaded end and one unthreaded end. The movable plate is slidably disposed in the locking groove and is sleeved on the adjusting rod. The guide telescopic column is disposed on the movable plate. The adaptive spring is disposed on the movable plate and located outside the guide telescopic column. The flexible clamping head is disposed at the movable end of the guide telescopic column, and the adaptive spring is disposed between the flexible clamping head and the movable plate.

[0016] The beneficial effects achieved by the present invention using the above structure are as follows:

[0017] 1. It achieves efficient and comprehensive automated detection, avoiding missed detections: By setting up a detection marking mechanism driven by a rotating motor, the detection head can automatically adhere to the inner wall of the orifice and make a circular motion under the spring preload, realizing 360° continuous and dead-angle-free scanning detection of the valve orifice. This completely changes the limitation of traditional manual measurement, which can only obtain discrete point data. It can accurately capture any local ellipticity or concave-convex deformation, greatly improving the comprehensiveness and reliability of the detection.

[0018] 2. Provides intuitive and permanent test records, facilitating quality traceability and analysis: This invention creatively adopts a mechanical synchronous marking mechanism. During the test, the real-time change in aperture is synchronously amplified and converted into the vertical displacement of the marking pen on the recording paper through a linkage mechanism such as a trigger column and a telescopic marking rod, thereby automatically drawing a complete aperture change curve. This curve is a direct and objective graphical record of aperture roundness, which is not only intuitive to judge, but can also be permanently saved as a product quality archive, greatly facilitating subsequent quality analysis, problem traceability and process improvement.

[0019] 3. A multi-directional adaptive flexible clamping mechanism is adopted to achieve stable and damage-free clamping: Addressing the pain point of easy damage during valve clamping, this invention designs a multi-directional linkage clamping scheme; one side achieves rigid clamping of both sides through hydraulic drive to ensure accurate positioning of the valve center; the other side uses a guide telescopic column with adaptive spring and a flexible clamping head to adaptively and flexibly clamp the other two sides of the valve; this clamping method that combines rigidity and flexibility can not only ensure the absolute stability of the valve during high-speed rotation testing, but also effectively avoid pressure damage or scratches on the valve surface caused by excessive or uneven clamping force, which is particularly suitable for valves with high precision or high surface finish requirements;

[0020] 4. High integration and simple operation, significantly improving detection efficiency: This invention integrates functions such as center positioning, multi-directional clamping, height adjustment, aperture fitting, rotation detection and automatic marking into one, forming a complete detection pipeline. It eliminates tedious manual measurement and recording steps, and the efficiency of a single person's work is revolutionaryly improved, making it very suitable for industrial batch detection scenarios. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of a valve orifice diameter detection device proposed in this invention;

[0022] Figure 2 This is a left view of a valve orifice diameter detection device proposed in this invention;

[0023] Figure 3 This is a front view of a valve orifice diameter detection device proposed in this invention;

[0024] Figure 4 This is a top view of a valve orifice diameter detection device proposed in this invention;

[0025] Figure 5 This is a bottom view of a valve orifice diameter detection device proposed in this invention;

[0026] Figure 6 This is a cross-sectional view of a valve orifice diameter detection device proposed in this invention;

[0027] Figure 7 This is a schematic diagram of a self-marking aperture detection mechanism;

[0028] Figure 8 This is a schematic diagram of the structure of a self-marking aperture detection device.

[0029] The components include: 1. Testing table; 2. Valve alignment clamping mechanism; 3. Self-marking aperture testing mechanism; 4. Frame; 5. Self-marking aperture testing component; 6. Rotary motor; 7. Aperture adaptation adjustment device; 8. Aperture testing marker; 9. Fixing plate; 10. Aperture wall fitting testing component; 11. Automatic marking component; 12. Fixing plate; 13. Support plate; 14. Support locking plate; 15. Slide groove; 16. Spring; 17. Trigger pin; 18. Fitting testing head; 19. Trigger hole; 20. Telescopic marking rod; 21. Marking adjustment rod; 22. Marking pen; 23. Marking ring; 24. Pull-out support. 25. Rod, Marking Ring, 26. Support Column, 27. Limiting Slide, 28. Height Adjusting Rod, 29. Fixing Block, 30. Hole Wall Fitting Adjusting Rod, 31. Linkage Clamping Device, 32. Adaptive Clamping Device, 33. Hydraulic Push Rod, 34. Linkage Rod, 35. Hinge Limiting Component, 36. Linkage Push Rod, 37. Clamping Slider, 38. Fixing Plate, 39. Fixing Column, 40. Limiting Ring, 41. Ear Plate, 42. Hinge Rod, 43. Connecting Plate, 44. Adjusting Rotary Rod, 45. Moving Plate, 46. Guide Telescopic Column, 47. Adaptive Spring, 48. Flexible Clamping Head, 49. Engaging Slot.

[0030] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. Detailed Implementation

[0031] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0032] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0033] like Figure 1 , Figure 3 , Figure 5 As shown, the present invention provides a valve orifice diameter detection device, including a detection platform 1, a valve alignment clamping mechanism 2, and a self-marking orifice diameter detection mechanism 3. The valve alignment clamping mechanism 2 is disposed on the detection platform 1, and the self-marking orifice diameter detection mechanism 3 is disposed on the detection platform 1.

[0034] like Figure 1 , Figure 4 , Figure 6 As shown, the valve centering clamping mechanism 2 includes a linkage clamping device 31 and an adaptive clamping device 32. The linkage clamping device 31 includes a hydraulic push rod 33, a linkage rod 34, a hinge limiter 35, a linkage push rod 36, and a clamping slider 37. The linkage rod 34 is symmetrically rotated on the testing table 1. One end of the hydraulic push rod 33 is hinged to one end of one of the linkage push rods 36, and the other end of the hydraulic push rod 33 is hinged to one end of the other linkage push rod 36. Positioning component 35 is mounted on the testing table 1. One end of the linkage push rod 36 is hinged to the other end of the linkage push rod 36, and the clamping slider 37 is hinged to the other end of the linkage push rod 36. The clamping slider 37 is engaged and slidably mounted in the testing table 1. The hinged limiting component 35 includes a fixed plate 38, a fixed post 39, a limiting ring 40, an ear plate 41, and a hinge rod 42. The fixed plate 38 is mounted on the testing table 1, the fixed post 39 is mounted on the bottom wall of the fixed plate 38, and the limiting ring 40 is sleeved and slidably mounted on the fixed post 39. On the upper part 9, ear plates 41 are symmetrically arranged on the outer circumferential wall of the limiting ring 40. A connecting plate 43 is provided in the middle part of the linkage rod 34. One end of the hinge rod 42 is hinged to the ear plate 41, and the other end of the hinge rod 42 is hinged to the connecting plate 43. The adaptive clamping device 32 includes an adjusting rotating rod 44, a moving plate 45, a guide telescopic column 46, an adaptive spring 47, and a flexible clamping head 48. The detection table 1 is provided with a locking groove 49, and the adjusting rotating rod 44 is rotatably disposed in the locking groove 49. The adjusting rod 44 is a cylindrical rod with a thread at one end and no thread at the other end. The moving plate 45 is engaged and slidably disposed in the engaging groove 49. The moving plate 45 is sleeved on the adjusting rod 44. The guide telescopic column 46 is disposed on the moving plate 45. The adaptive spring 47 is disposed on the moving plate 45 and is disposed outside the guide telescopic column 46. The flexible clamping head 48 is disposed at the movable end of the guide telescopic column 46. The adaptive spring 47 is disposed between the flexible clamping head 48 and the moving plate 45.

[0035] like Figure 1 , Figure 2 , Figure 7 , Figure 8As shown, the self-marking aperture detection mechanism 3 includes a frame 4, a self-marking aperture detection component 5, and a rotating motor 6. The frame 4 is mounted on the detection table 1, the self-marking aperture detection component 5 is rotatably mounted on the frame 4, and the rotating motor 6 is mounted on the frame 4. The output end of the rotating motor 6 is connected to the self-marking aperture detection component 5. The self-marking aperture detection component 5 includes an aperture adaptation adjustment device 7 and an aperture detection mark 8. The aperture adaptation adjustment device 7 is mounted on the frame 4, and the aperture detection mark 8 is connected to the aperture adaptation adjustment device 7. The aperture detection mark 8 includes a fixing plate 9 and an aperture wall fitting detection component. 10 and automatic marking component 11, fixed plate 9 is connected to aperture adaptation adjustment device 7, aperture wall fit detection component 10 is disposed on fixed plate 9, automatic marking component 11 is engaged and slidably disposed on fixed plate 9; fixed plate 9 includes fixed plate 12, support plate 13 and support engagement plate 14, fixed plate 12 is connected to aperture adaptation adjustment device 7, support plate 13 is disposed on fixed plate 12, support engagement plate 14 is disposed on fixed plate 12, support engagement plate 14 is disposed above support plate 13; support engagement plate 14 is provided with sliding groove 15; aperture wall fit detection component 10 includes spring 16 and trigger post. The 17 and the bonding detection head 18 are mounted on the fixed plate 12, which has a trigger hole 19. The trigger post 17 is telescopically slidably disposed in the trigger hole 19. One end of the spring 16 is disposed on the fixed plate 12, and the bonding detection head 18 is connected to the other end of the spring 16. The automatic marking component 11 includes a telescopic marking rod 20, a marking adjustment rod 21, a marking pen 22, and a marking ring 23. The telescopic marking rod 20 is engaged and slidably disposed in the slide groove 15. The marking adjustment rod 21 is disposed on the telescopic marking rod 20, and the marking pen 22 is connected to the movable end of the marking adjustment rod 21. The marking ring 23 includes a pull-out support rod 24 and a marking ring 23. 5 and support column 26, pull-out support rod 24 is set on frame 4, marking ring 25 is set on pull-out support rod 24, support column 26 is set on aperture adaptation adjustment device 7, the bottom wall of marking ring 25 is provided with limiting slide groove 27, support column 26 is engaged and slidably set in limiting slide groove 27; aperture adaptation adjustment device 7 includes height adjustment rod 28, fixing block 29, and aperture wall fitting adjustment rod 30. Height adjustment rod 28 is set on frame 4, fixing block 29 is connected to the movable end of height adjustment rod 28, aperture wall fitting adjustment rod 30 is set on fixing block 29, and support column 26 is set on fixing block 29.

[0036] In practical use, the valve to be tested is placed at the center of the testing platform 1, aligning the valve's core with the center of the fixed plate. The flexible clamping head of the moving plate activates the hydraulic push rod 33 via the adaptive spring guide telescopic column. The hydraulic push rod 33 extends, causing the linkage rod 34 to rotate. The rotation of the linkage rod 34 causes the linkage push rod 36 to move closer to the valve. The movement of the linkage push rod 36 pushes the clamping slider 37 closer to the valve. Simultaneously, the rotation of the linkage rod 34 causes the connecting plate 43 to move. The movement of the connecting plate 43 causes the hinge rod 42 to move. The movement of the hinge rod 42 causes the ear plate 41 to move. The movement of the ear plate 41 causes the limiting ring 40 to move down along the fixed column 39, achieving the technical effect of concentric clamping and fixing the valve on both sides. The adjustable rotating rod 44 can be rotated to adjust... The rotation of the pivot rod 44 drives the moving plate 45 to move along the engaging groove 49. The movement of the moving plate 45 drives the guide telescopic column 46 to move, which in turn drives the flexible clamping head 48 to move. Under the combined action of the adaptive spring 47 and the guide telescopic column 46, the other two sides of the valve are adaptively clamped, achieving a multi-directional stable clamping and fixing effect on the valve. A ring of paper is pasted on the outer circumferential wall of the marking ring 25. The height adjustment rod 28 is activated. The extension and retraction of the height adjustment rod 28 drives the fixing block 29 to rise and fall. The rise and fall of the fixing block 29 drives the hole wall fitting adjustment rod 30 to rise and fall. The rise and fall of the hole wall fitting adjustment rod 30 drives the hole diameter detection mark 8 to rise and fall until the hole diameter detection mark 8 moves into the valve hole to be detected. The hole wall fitting adjustment rod 30 is then activated. The hole wall fitting adjustment rod 30 extends and retracts, causing the hole diameter detection mark 8 to move until the fitting detection head 18 in the hole diameter detection mark 8 fits against the inner wall of the valve hole to be tested, and the spring 16 is in a slightly compressed state. The mark adjustment rod 21 is pressed against the support plate 13. The mark adjustment rod 21 is activated, and the extension and retraction of the mark adjustment rod 21 causes the mark pen 22 to extend and retract until the mark pen 22 touches the mark ring 25. The rotation motor 6 is activated, and the rotation of the rotation motor 6 causes the height adjustment rod 28 to rotate. The rotation of the height adjustment rod 28 causes the fixing block 29 to rotate. The rotation of the fixing block 29 causes the hole wall fitting adjustment rod 30 to rotate. The rotation of the hole wall fitting adjustment rod 30 causes the fixing plate 9 to rotate. The rotation of the fixing plate 9 causes the trigger post 17 to rotate. The rotation of the trigger post 17 causes the fitting detection head 18 to move. 8. Rotate the contact detection head 18 to perform a circumferential all-around inspection of the valve's orifice diameter. When the valve's orifice diameter decreases, the contact detection head 18 is compressed. At this time, the spring 16 contracts, and the contact detection head 18 is compressed to push the trigger pin 17 to move along the trigger hole 19. The movement of the trigger pin 17 causes the telescopic marking rod 20 to rise along the slide groove 15. The rise of the telescopic marking rod 20 drives the marking adjustment rod 21 to rise, and the rise of the marking adjustment rod 21 drives the marking pen 22 to rise. At this time, the line drawn by the marking pen 22 on the paper will move upward. When the valve orifice diameter increases, the process is reversed. After the inspection is completed, the paper on the marking ring 25 can be removed, and the roundness of the valve orifice diameter can be clearly observed. The above is the specific working process of this invention. This step can be repeated next time it is used.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0038] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the foregoing and its equivalents.

[0039] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A valve orifice diameter detection device, characterized in that: The device includes a testing platform (1), a valve centering clamping mechanism (2), and a self-marking aperture detection mechanism (3). The valve centering clamping mechanism (2) is mounted on the testing platform (1), and the self-marking aperture detection mechanism (3) is mounted on the testing platform (1). The self-marking aperture detection mechanism (3) includes a frame (4), a self-marking aperture detection component (5), and a rotating motor (6). The frame (4) is mounted on the testing platform (1), the self-marking aperture detection component (5) is rotatably mounted on the frame (4), and the rotating motor (6) is mounted on the frame (4). The output end of the rotating motor (6) is connected to the self-marking aperture... The aperture detection component (5) is connected to the aperture measuring component (5); the self-marking aperture measuring component (5) includes an aperture adaptation adjustment device (7) and an aperture measuring mark (8). The aperture adaptation adjustment device (7) is mounted on the frame (4), and the aperture measuring mark (8) is connected to the aperture adaptation adjustment device (7); the aperture measuring mark (8) includes a fixing plate (9), an aperture wall fitting detection component (10), and an automatic marking component (11). The fixing plate (9) is connected to the aperture adaptation adjustment device (7), the aperture wall fitting detection component (10) is mounted on the fixing plate (9), and the automatic marking component (11) engages with the sliding device. The fixed plate (9) is located on a fixed plate (12), a support plate (13), and a support locking plate (14). The fixed plate (12) is connected to the aperture adaptation adjustment device (7). The support plate (13) is located on the fixed plate (12), and the support locking plate (14) is located on the fixed plate (12) and above the support plate (13). The support locking plate (14) is provided with a sliding groove (15). The aperture wall fitting detection component (10) includes a spring (16), a trigger post (17), and a fitting detection head (18). The fixed plate (12) is located on the fixed plate (9). The upper part is provided with a trigger hole (19), the trigger post (17) is telescopically slidably disposed in the trigger hole (19), one end of the spring (16) is disposed on the fixed plate (12), and the fitting detection head (18) is connected to the other end of the spring (16); the automatic marking component (11) includes a telescopic marking rod (20), a marking adjustment rod (21), a marking pen (22) and a marking ring (23), the telescopic marking rod (20) is engaged and slidably disposed in the slide groove (15), the marking adjustment rod (21) is disposed on the telescopic marking rod (20), and the marking pen (22) is connected to the movable end of the marking adjustment rod (21);The marking ring component (23) includes a pull-out support rod (24), a marking ring (25), and a support column (26). The pull-out support rod (24) is mounted on the frame (4), the marking ring (25) is mounted on the pull-out support rod (24), and the support column (26) is mounted on the aperture adaptation adjustment device (7). A limiting groove (27) is provided on the bottom wall of the marking ring (25), and the support column (26) is engaged and slidably mounted in the limiting groove (27). The trigger column (17) moves to drive the telescopic marking rod (20) to move up and down.

2. The valve orifice diameter detection device according to claim 1, characterized in that: The aperture adaptation adjustment device (7) includes a height adjustment rod (28), a fixing block (29), and a hole wall fitting adjustment rod (30). The height adjustment rod (28) is mounted on the frame (4). The fixing block (29) is connected to the movable end of the height adjustment rod (28). The hole wall fitting adjustment rod (30) is mounted on the fixing block (29). The support column (26) is mounted on the fixing block (29).

3. The valve orifice diameter detection device according to claim 2, characterized in that: The valve centering clamping mechanism (2) includes a linkage clamping device (31) and an adaptive clamping device (32). The linkage clamping device (31) includes a hydraulic push rod (33), a linkage rod (34), a hinge limiter (35), a linkage push rod (36), and a clamping slider (37). The linkage rod (34) is symmetrically rotated on the testing table (1). One end of the hydraulic push rod (33) is hinged to one end of one of the linkage push rods (36), and the other end of the hydraulic push rod (33) is hinged to one end of another linkage push rod (36). The hinge limiter (35) is located on the testing table (1). One end of the linkage push rod (36) is hinged to the other end of the linkage push rod (36). The clamping slider (37) is hinged to the other end of the linkage push rod (36). The clamping slider (37) is engaged and slidably disposed in the testing table (1).

4. The valve orifice diameter detection device according to claim 3, characterized in that: The hinge limiting component (35) includes a fixed plate (38), a fixed post (39), a limiting ring (40), an ear plate (41), and a hinge rod (42). The fixed plate (38) is located on the testing table (1). The fixed post (39) is located on the bottom wall of the fixed plate (38). The limiting ring (40) is slidably mounted on the fixed post (39). The ear plate (41) is symmetrically located on the outer circumferential wall of the limiting ring (40). The middle part of the linkage rod (34) is provided with a connecting plate (43). One end of the hinge rod (42) is hinged to the ear plate (41), and the other end of the hinge rod (42) is hinged to the connecting plate (43).

5. The valve orifice diameter detection device according to claim 4, characterized in that: The adaptive clamping device (32) includes an adjusting rod (44), a moving plate (45), a guide telescopic column (46), an adaptive spring (47), and a flexible clamping head (48). The detection table (1) is provided with a locking groove (49). The adjusting rod (44) is rotatably disposed in the locking groove (49). The adjusting rod (44) is a cylindrical rod with a thread on one end and no thread on the other end. The moving plate (45) is locked and slidably disposed in the locking groove (49). The moving plate (45) is sleeved on the adjusting rod (44). The guide telescopic column (46) is disposed on the moving plate (45). The adaptive spring (47) is disposed on the moving plate (45) and is disposed outside the guide telescopic column (46). The flexible clamping head (48) is disposed at the movable end of the guide telescopic column (46). The adaptive spring (47) is disposed between the flexible clamping head (48) and the moving plate (45).

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