Tool for measuring sealing surface of valve body of wedge-type single-gate-disc gate valve

Abstract

The invention discloses a wedge-type single-gate-plate gate valve body sealing surface measuring tool, belongs to the technical field of valve processing, and aims to solve the problem that the distance between sealing surfaces on two sides of a wedge-type single-gate-plate gate valve is difficult to measure. Comprising a reference body and a main shaft, the reference body is connected with a valve body, the axis of an inner hole of the reference body is located over the axis of the reference body, the main shaft is coaxial with the inner hole of the reference body and can move left and right, a measuring rod is connected with the main shaft in a locking mode, and the horizontal distance between the centers of the sealing faces and the axis of the measuring rod is calculated through abutting tangency of the measuring rod and the two sealing faces. And the distance change of the measuring rod when the measuring rod abuts against and is tangent to the two sealing surfaces is measured, so that the center-to-center distance between the two sealing surfaces can be accurately obtained, and the distance between the sealing surfaces of the valve body of the single-gate-plate gate valve can be efficiently and accurately measured.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of valve processing, and particularly relates to a wedge type single-gate plate gate valve body sealing surface measuring tool. BACKGROUND

[0002] In the fields of petrochemical industry and electric power industry, the wedge type single-gate plate gate valve has been widely applied due to its unique structural advantages. At present, domestic manufacturing enterprises generally adopt a valve clack thickness single-proportioning processing technology. The technology adjusts the thickness of the valve clack in the assembly stage to compensate for the measurement error of the interval between the two valve seat sealing surfaces in the processing process. Since the valve seat is fixed in the valve body by means of inlaying and welding, the welding deformation needs to be eliminated by finish machining, and the two valve seats are symmetrically arranged at a specific angle, which results in great difficulty in accurate measurement of the interval. Although the technology can ensure that the valve sealing performance meets the design requirements, it has low processing efficiency and causes poor interchangeability of valve parts. When internal leakage occurs in the field use process, the maintenance is often difficult and the cycle is long. SUMMARY

[0003] The application aims to provide a wedge type single-gate plate gate valve body sealing surface measuring tool to solve the problems of great difficulty in measuring the interval between the two sealing surfaces of the wedge type single-gate plate gate valve and poor interchangeability of the valve body. The technical scheme adopted by the application is as follows.

[0004] A wedge type single-gate plate gate valve body sealing surface measuring tool, the valve body is provided with left-right symmetrical first valve seat sealing surfaces and second valve seat sealing surfaces, the measuring tool comprises a main shaft, a locking sleeve, a measuring rod, a reference body and a main nut;

[0005] The reference body is a tubular member, the outer periphery of the reference body is provided with a reference shoulder, the outer periphery of the reference shoulder is matched with the drift diameter of the valve body, the right end of the reference body is connected with the right end flange of the valve body, the axis of the inner hole of the reference body is directly above the axis of the reference shoulder, and the main nut is coaxially arranged in the inner hole of the reference body;

[0006] The main shaft comprises a measuring section, a shaft shoulder section, a support guide section and a threaded section which are coaxially connected in sequence from left to right, the outer periphery of the shaft shoulder section is provided with a threaded structure, the measuring section is provided with a reversing groove, the locking sleeve is provided with a through waist-shaped hole in the radial direction, the locking sleeve is sleeved on the measuring section and is threadedly connected with the shaft shoulder section, the measuring rod is a round rod, the measuring rod passes through the reversing groove and the waist-shaped hole, the reversing groove is provided with at least one horizontal limiting surface, and the distance between the horizontal limiting surface and the axis of the main shaft is equal to the radius of the measuring rod, during measurement, the locking sleeve presses the measuring rod on the horizontal limiting surface through the side wall of the waist-shaped hole, the threaded section is threadedly connected with the main nut, the lower side of the support guide section is provided with a guide groove which is opened in the axial direction, and the upper end of the support positioning pin passes through the reference body and is inserted and slidably connected with the guide groove;

[0007] The included angle of the first valve seat sealing surface and the second valve seat sealing surface is θ, the distance between the inner hole axis of the reference body and the axis of the reference shoulder is a, and the radius of the auxiliary measuring rod is r, so that a and r satisfy the following formula:

[0008] .

[0009] Further, the reversing groove is formed by two symmetrical fan-shaped cross-section grooves connected, one side of the fan-shaped cross-section groove is a vertical surface, the other side is a horizontal limiting surface, the fan-shaped openings of the two fan-shaped cross-section grooves face opposite directions, the central angles of the two fan-shaped cross-section grooves coincide, and the coincident part forms a square cross-section cavity with a side length of r.

[0010] Further, the inner hole of the reference body is composed of an avoidance hole section, a blocking ring hole section, a counterbore section and a threaded hole section connected coaxially from left to right, the diameter of the threaded hole section is larger than that of the counterbore section, the diameter of the counterbore section is larger than that of the blocking ring hole section, the main nut is rotationally arranged in the counterbore section, the outer periphery of the main nut is provided with a limiting flange, the outer periphery of the compression ring is threadedly connected with the inner periphery of the threaded hole section, two thrust bearings are sleeved on the main nut, the left end surface of the limiting flange and the bottom surface of the counterbore section abut through one thrust bearing, and the right end surface of the limiting flange and the left end surface of the compression ring abut through the other thrust bearing.

[0011] Further, the connecting threads between the compression ring and the reference body are drilled and tapped with a retreat-stop screw hole, and a retreat-stop screw is threadedly matched with the retreat-stop screw hole.

[0012] Further, a support screw hole is processed on the side wall of the reference body, the outer periphery of the support guide pin is threadedly matched with the support screw hole, the support guide pin is threadedly connected with the retreat-stop nut, and the retreat-stop nut is locked and compressed on the lower side of the reference body.

[0013] Further, the right end of the reference body is provided with a connecting flange plate, the connecting flange plate is provided with a first positioning hole, a second positioning hole, a first bolt hole and a second bolt hole, the first positioning hole is matched with the flange hole corresponding to the right end flange of the valve body through a stepped cylindrical pin, the second positioning hole is matched with the flange hole corresponding to the right end flange of the valve body through an edge-cutting pin, and the first bolt hole and the second bolt hole are both connected with the flange hole corresponding to the right end flange of the valve body through a fastening bolt and a fastening nut.

[0014] Further, the right end of the main nut protrudes from the inner hole of the compression ring, and a cross groove is arranged on the right end surface of the main nut.

[0015] Compared with the prior art, the beneficial effects of the present application are:

[0016] By ensuring that the tangent point of the axial projection of the measuring rod on the first valve seat sealing surface coincides with the center projection of the first valve seat sealing surface, and the tangent point of the axial projection of the measuring rod on the second valve seat sealing surface coincides with the center projection of the second valve seat sealing surface, the horizontal distance L1 between the center of the first valve seat sealing surface and the axis of the measuring rod in the first measurement state, and the horizontal distance L2 between the center of the second valve seat sealing surface and the axis of the measuring rod in the second measurement state, can be accurately calculated using trigonometric functions. Adding L1, L2, and the distance L between the positions of the measuring rod in the first and second measurement states yields the center distance between the first and second valve seat sealing surfaces. This invention allows for the precise determination of the distance between the sealing surfaces on both sides of a wedge-type single-gate valve. It solves the problems of low processing efficiency and difficult subsequent maintenance. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the device of the present invention;

[0018] Figure 2 This is a schematic diagram of measuring the sealing surface of the first valve seat using the tooling of this invention;

[0019] Figure 3 yes Figure 2 View from direction A;

[0020] Figure 4 yes Figure 1 DD sectional view;

[0021] Figure 5 This is a schematic diagram of the main shaft structure;

[0022] Figure 6 yes Figure 2 Enlarged view of point I;

[0023] Figure 7 yes Figure 5 EE sectional view;

[0024] Figure 8 This is a cross-sectional view of the locking sleeve;

[0025] Figure 9 yes Figure 8 GG cross-sectional view;

[0026] Figure 10 This is a schematic diagram showing that the center of the first valve seat sealing surface and the axial projection of the measuring rod coincide at the tangent point on the projection of the first valve seat sealing surface.

[0027] Figure 11 yes Figure 5 F-direction view;

[0028] Figure 12 It is a sectional view of the reference body;

[0029] Figure 13 This is a sectional view of the main nut;

[0030] Figure 14 yes Figure 3 BB section view;

[0031] Figure 15 yes Figure 3 CC section view;

[0032] Figure 16 This is an end view of the connecting flange plate.

[0033] In the diagram, 1. Main shaft, 2. Locking sleeve, 3. Measuring rod, 4. First valve seat sealing surface, 5. Second valve seat sealing surface, 6. Support guide pin, 7. Thrust bearing, 8. Reference body, 9. Pressure ring, 10. Valve body, 11. Main nut, 12. Anti-reverse screw, 13. Anti-reverse nut, 14. Stepped cylindrical pin, 15. Fastening bolt, 16. Chamfered pin, 17. Fastening nut, 18. Reference shoulder, 19. First positioning hole, 20. First bolt hole, 21. Second positioning hole, 22. Second bolt hole, 23. Guide groove, 24. Sector-shaped groove, 25. Threaded section, 26. Waist-shaped hole, 27. Reversing groove, 28. Measuring section, 29. Shoulder section, 30. Support guide section, 31. Horizontal limiting surface, 32. Connecting flange plate, 33. 34. Threaded hole section, 35. Countersunk hole section, 36. Support screw hole, 37. Limiting flange, 38. Cross groove, 39. Clearance hole section, 30. Retaining ring hole section. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this invention clearer, the invention is described below with reference to specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0035] The connections mentioned in this invention are divided into fixed connections and detachable connections. Fixed connections, also known as non-detachable connections, include but are not limited to conventional fixed connection methods such as folded connections, riveted connections, adhesive connections, and welded connections. Detachable connections include but are not limited to conventional disassembly methods such as bolted connections, snap-fit ​​connections, pin connections, and hinged connections. When a specific connection method is not explicitly defined, it is assumed that at least one existing connection method can be found to achieve this function, and those skilled in the art can choose according to their needs. For example, a welded connection can be chosen for fixed connections, and a bolted connection can be chosen for detachable connections.

[0036] The present invention will be further described in detail below with reference to the accompanying drawings. The following embodiments are explanations of the present invention, but the present invention is not limited to the following embodiments.

[0037] Example: Figures 1-16 As shown, a wedge-type single-gate valve body sealing surface measuring fixture is provided. The valve body 10 is three-way shaped, and the valve body 10 is set to be left and right with the flow diameter. The valve body 10 is provided with a first valve seat sealing surface 4 and a second valve seat sealing surface 5 that are symmetrically arranged on the left and right. The measuring fixture includes a main shaft 1, a locking sleeve 2, a measuring rod 3, a reference body 8 and a main nut 11.

[0038] The reference body 8 is a tubular component. The outer periphery of the reference body 8 is provided with a reference shoulder 18. The outer periphery of the reference shoulder 18 is adapted to the through diameter of the valve body 10. The right end of the reference body 8 is connected to the right end flange of the valve body 10. The inner hole of the reference body 8 is an eccentric hole. The axis of the inner hole of the reference body 8 is directly above the axis of the reference shoulder 18. The main nut 11 is coaxially rotatably installed in the inner hole of the reference body 8, that is, the axis of the main nut 11 is directly above the axis of the reference shoulder 18.

[0039] The main spindle 1 includes a measuring section 28, a shoulder section 29, a support and guide section 30, and a threaded section 25, which are coaxially connected from left to right. The diameter of the shoulder section 29 is larger than that of the measuring section 28. The outer circumference of the shoulder section 29 is provided with a threaded structure. A reversing groove 27 is provided on the measuring section 28. A through oblong hole 26 is provided on the locking sleeve 2 along the radial direction. The locking sleeve 2 is sleeved on the measuring section 28 and threadedly connected to the shoulder section 29. The measuring rod 3 is a round rod that passes through the reversing groove 27. The oblong hole 26 and the reversing groove 27 are provided with at least one horizontal limiting surface 31, and the distance between the horizontal limiting surface 31 and the axis of the main shaft 1 is equal to the radius of the measuring rod 3. During measurement, the locking sleeve 2 presses the measuring rod 3 onto the horizontal limiting surface 31 through the side wall of the oblong hole 26. The threaded section 25 is threadedly connected to the main nut 11. The lower side of the support guide section 30 is provided with a guide groove 23 opened along the axial direction. The upper end of the support positioning pin 6 passes through the reference body 8 and is inserted and slidably engaged with the guide groove 23.

[0040] Let the included angle between the first valve seat sealing surface 4 and the second valve seat sealing surface 5 be 2θ, the distance between the inner hole axis of the reference body 8 and the axis of the reference shoulder 18 be a, and the radius of the auxiliary measuring rod 3 be r. Then a and r satisfy the following formula:

[0041] .

[0042] During measurement, by tightening the locking sleeve 2, the measuring rod 3 is pressed onto the horizontal limiting surface 31 through the side wall of the oblong hole 26. Since the distance between the horizontal limiting surface 31 and the axis of the main shaft 1 is equal to the radius of the measuring rod 3, the measuring rod 3 will necessarily be horizontal when measuring the center distance between the first valve seat sealing surface 4 and the second valve seat sealing surface 5, and the axis of the measuring rod 3 will necessarily intersect the axis of the main shaft 1 perpendicularly. Furthermore, since the centers of the first valve seat sealing surface 4 and the second valve seat sealing surface 5 are both on the axis of the valve body 10's diameter, the axis of the measuring rod 3 is directly above the centers of the first valve seat sealing surface 4 and the second valve seat sealing surface 5, at a distance of 'a'. When the main nut 11 is rotated, the main shaft 1, guided by the support positioning pin 6, It can remain stationary and only move left and right. Therefore, by rotating the main nut 11, the main shaft 1 can press the measuring rod 3 onto the first valve seat sealing surface 4 or the second valve seat sealing surface 5 through the end of the reversing groove 27, so that the outer circumferential surface of the measuring rod 3 is tangent to the first valve seat sealing surface 4 or the second valve seat sealing surface 5. The state when the measuring rod 3 is tangent to the first valve seat sealing surface 4 is defined as the first measurement state, and the state when the measuring rod 3 is tangent to the second valve seat sealing surface 5 is defined as the second measurement state. The distance between the position of the measuring rod 3 in the first measurement state and the position in the second measurement state is L. L can be accurately measured by the position change of the right end face of the main shaft 1 in the first measurement state and the second measurement state.

[0043] To accurately measure the center distance between the first valve seat sealing surface 4 and the second valve seat sealing surface 5, the tangent point of the axial projection of the measuring rod 3 on the first valve seat sealing surface 4 should coincide with the center projection of the first valve seat sealing surface 4, and the tangent point of the axial projection of the measuring rod 3 on the second valve seat sealing surface 5 should coincide with the center projection of the second valve seat sealing surface 5. The horizontal distance L1 between the center of the first valve seat sealing surface 4 and the axis of the measuring rod 3 in the first measurement state, and the horizontal distance L2 between the center of the second valve seat sealing surface 5 and the axis of the measuring rod 3 in the second measurement state can be accurately calculated using trigonometric functions. The center distance between the first valve seat sealing surface 4 and the second valve seat sealing surface 5 can be obtained by adding L1, L2 and L.

[0044] Therefore, the inner hole of the reference body 8 is set as an eccentric hole. Based on the wedge angle θ of the first valve seat sealing surface 4 and the second valve seat sealing surface 5 and the radius r of the measuring rod 3, the eccentricity a between the inner hole of the reference body 8 and the reference shoulder 18 is determined, so that the ratio of a to r is equal to the sine of the wedge angle θ. The center distance between the first valve seat sealing surface 4 and the second valve seat sealing surface 5 can be accurately measured by the above method.

[0045] The reversing groove 27 is formed by connecting two symmetrical fan-shaped cross-section grooves 24. One side of the fan-shaped cross-section groove 24 is a vertical surface, and the other side is a horizontal limiting surface 31. The fan-shaped openings of the two fan-shaped cross-section grooves 24 face opposite directions, and their central angles coincide, forming a square cross-section cavity with a side length of 2r. With this configuration, the measuring rod 3 can be inserted through the upper opening of the valve body 10, and pass through the waist-shaped hole 26 and the annular groove 27 while conforming to the vertical side of the two fan-shaped cross-section grooves 24. After passing through, the locking sleeve 2 is screwed on, and the measuring rod 3 can be turned from the side of the fan-shaped cross-section groove 24 closer to the vertical surface to conform to the horizontal limiting surface 31, and finally locked by the locking sleeve 2. This facilitates the insertion of the measuring rod 3 and makes it easier for the measuring rod 3 to be in a horizontal position.

[0046] The inner hole of the reference body 8 is composed of a clearance hole section 38, a retaining ring hole section 39, a countersunk hole section 34, and a threaded hole section 33, which are coaxially connected from left to right. The diameter of the threaded hole section 33 is larger than the diameter of the countersunk hole section 34, and the diameter of the countersunk hole section 34 is larger than the diameter of the retaining ring hole section 39. The main nut 11 is rotatably mounted inside the countersunk hole section 34. The outer circumference of the main nut 11 is provided with a limiting flange 36. The side wall of the threaded hole section 33 is provided with an internal thread structure. The outer circumference of the pressure ring 9 is threadedly connected to the inner circumference of the threaded hole section 33. Two thrust bearings 7 are sleeved on the main nut 11. The left end face of the limiting flange 36 abuts against the bottom surface of the countersunk hole section 34 through one thrust bearing 7, and the right end face of the limiting flange 36 abuts against the left end face of the pressure ring 9 through the other thrust bearing 7. The main nut 11 and the reference body 8 are rotatably engaged through the thrust bearings 7, which not only allows the main nut 11 to rotate flexibly but also enables it to bear axial thrust.

[0047] A locking screw hole is drilled and tapped between the connecting threads of the pressure ring 9 and the reference body 8. The locking screw 12 is threadedly engaged with the locking screw hole to prevent the pressure ring 9 from loosening.

[0048] The side wall of the reference body 8 is machined with a support screw hole 35. The outer periphery of the support guide pin 6 is threadedly engaged with the support screw hole 35. The support guide pin 6 is threadedly connected to the anti-reverse nut 13. The anti-reverse nut 13 is locked and pressed against the lower side of the reference body 8 to prevent the support guide pin 6 from loosening.

[0049] The right end of the reference body 8 is provided with a connecting flange plate 32. The connecting flange plate 32 has a first positioning hole 19, a second positioning hole 21, a first bolt hole 20, and a second bolt hole 22. The first positioning hole 19 is engaged with the flange hole corresponding to the right end flange of the valve body 10 through a stepped cylindrical pin 14. The second positioning hole 21 is engaged with the flange hole corresponding to the right end flange of the valve body 10 through a chamfered pin 16. The first bolt hole 20 and the second bolt hole 22 are both connected to the flange holes corresponding to the right end flange of the valve body 10 through fastening bolts 15 and fastening nuts 17. The flange of the valve body 10 makes it easier and more convenient to install and fix the reference body 8, and the stepped cylindrical pin 14 and the chamfered pin 16 facilitate the precise fit between the reference body 8 and the valve body.

[0050] The right end of the main nut 11 protrudes from the inner hole of the pressure ring 9. A cross groove 37 is provided on the right end face of the main nut 11. By inserting a tool into the cross groove 37 and then rotating it, the main nut can be rotated.

[0051] By ensuring that the tangent point of the axial projection of the measuring rod on the first valve seat sealing surface coincides with the center projection of the first valve seat sealing surface, and the tangent point of the axial projection of the measuring rod on the second valve seat sealing surface coincides with the center projection of the second valve seat sealing surface, the horizontal distance L1 between the center of the first valve seat sealing surface and the axis of the measuring rod in the first measurement state, and the horizontal distance L2 between the center of the second valve seat sealing surface and the axis of the measuring rod in the second measurement state, can be accurately calculated using trigonometric functions. Adding L1, L2, and the distance L between the positions of the measuring rod in the first and second measurement states yields the center distance between the first and second valve seat sealing surfaces. This invention allows for the precise determination of the distance between the sealing surfaces on both sides of a wedge-type single-gate valve. It solves the problems of low processing efficiency and difficult subsequent maintenance.

[0052] The above embodiments are merely illustrative examples of the present invention and do not limit its scope of protection. Those skilled in the art can make partial changes to them, as long as they do not exceed the spirit and essence of the present invention, they are all within the scope of protection of the present invention.

Claims

1. A measuring tool for a wedge-type single-disk gate valve body sealing surface, the valve body (10) is provided with a left-right symmetrical first valve seat sealing surface (4) and a second valve seat sealing surface (5), characterized in that: The measuring tool comprises a main shaft (1), a locking sleeve (2), a measuring rod (3), a reference body (8) and a main nut (11); The reference body (8) is a tubular member, the outer periphery of the reference body (8) is provided with a reference shoulder (18), the outer periphery of the reference shoulder (18) is adapted to the drift diameter of the valve body (10), the right end of the reference body (8) is connected with the right end flange of the valve body (10), the axis of the inner hole of the reference body (8) is directly above the axis of the reference shoulder (18), and the main nut (11) is coaxially arranged in the inner hole of the reference body (8); The main shaft (1) comprises a measuring section (28), a shaft shoulder section (29), a supporting and guiding section (30) and a threaded section (25) which are coaxially connected in sequence from left to right, the outer periphery of the shaft shoulder section (29) is provided with a threaded structure, the measuring section (28) is provided with a reversing groove (27), the locking sleeve (2) is provided with a through waist-shaped hole (26) in the radial direction, the locking sleeve (2) is sleeved on the measuring section (28) and is threadedly connected with the shaft shoulder section (29), the measuring rod (3) is a circular rod, the measuring rod (3) passes through the reversing groove (27) and the waist-shaped hole (26), the reversing groove (27) is provided with at least one horizontal limiting surface (31), and the distance between the horizontal limiting surface (31) and the axis of the main shaft (1) is equal to the radius of the measuring rod (3), during measurement, the locking sleeve (2) presses the measuring rod (3) on the horizontal limiting surface (31) through the side wall of the waist-shaped hole (26), the threaded section (25) is threadedly connected with the main nut (11), the lower side of the supporting and guiding section (30) is provided with an axial guiding groove (23), the upper end of the supporting and positioning pin (6) passes through the reference body (8) and is in sliding fit with the guiding groove (23); The included angle of the first valve seat sealing surface (4) and the second valve seat sealing surface (5) is 2θ, the distance between the axis of the inner hole of the reference body (8) and the axis of the reference shoulder (18) is a, and the radius of the auxiliary measuring rod (3) is r, and a and r satisfy the following formula: 。 2. A wedge-type single-disk gate valve body seal face measuring tool according to claim 1, characterized in that: The reversing groove (27) is formed by two symmetrical fan-shaped cross-section grooves (24) connected with each other, one side of the fan-shaped cross-section groove (24) is a vertical surface, the other side is a horizontal limiting surface (31), the fan-shaped openings of the two fan-shaped cross-section grooves (24) face opposite directions, the centers of the two fan-shaped cross-section grooves (24) are coincided, and the coincided part forms a square cross-section cavity with a side length of 2r.

3. A wedge-type single-disk gate valve body seal face measuring tool as defined in claim 1, wherein: The inner hole of the reference body (8) is composed of an avoiding hole section (38), a blocking ring hole section (39), a counterbore section (34) and a threaded hole section (33) connected coaxially from left to right, the diameter of the threaded hole section (33) is larger than that of the counterbore section (34), the diameter of the counterbore section (34) is larger than that of the blocking ring hole section (39), the main nut (11) is rotationally arranged in the counterbore section (34), the outer periphery of the main nut (11) is provided with a limiting flange (36), the outer periphery of the pressing ring (9) is threadedly connected with the inner periphery of the threaded hole section (33), two thrust bearings (7) are sleeved on the main nut (11), the left end surface of the limiting flange (36) abuts against the bottom surface of the counterbore section (34) through one thrust bearing (7), and the right end surface of the limiting flange (36) abuts against the left end surface of the pressing ring (9) through the other thrust bearing (7).

4. A wedge-type single-disk gate valve body seal face measuring tool according to claim 3, wherein: The connecting threads between the pressing ring (9) and the reference body (8) are drilled and tapped with retreat-stop screw holes, and the retreat-stop screw (12) is threadedly matched with the retreat-stop screw holes.

5. A wedge-type single-disk gate valve body seal face measuring tool according to claim 3, wherein: The side wall of the reference body (8) is processed with support screw holes (35), the outer periphery of the support guide pin (6) is threadedly matched with the support screw holes (35), the support guide pin (6) is threadedly connected with the retreat-stop nut (13), and the retreat-stop nut (13) is locked and compressed on the lower side of the reference body (8).

6. A wedge-type single-disk gate valve body seal face measuring tool as defined in claim 3, wherein: The right end of the reference body (8) is provided with a connecting flange plate (32), the connecting flange plate (32) is provided with a first positioning hole (19), a second positioning hole (21), a first bolt hole (20) and a second bolt hole (22), the first positioning hole (19) is matched with the flange hole corresponding to the right end flange of the valve body (10) through the stepped cylindrical pin (14), the second positioning hole (21) is matched with the flange hole corresponding to the right end flange of the valve body (10) through the chamfered pin (16), and the first bolt hole (20) and the second bolt hole (22) are both connected with the flange hole corresponding to the right end flange of the valve body (10) through the fastening bolt (15) and the fastening nut (17).

7. A wedge-type single-disk gate valve body seal face measuring tool according to any one of claims 1-6, characterized in that: The right end of the main nut (11) protrudes from the inner hole of the pressing ring (9), and the right end surface of the main nut (11) is provided with a cross slot (37).

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