Wedge gate valve blue oil test tool

Abstract

The utility model relates to a wedge gate valve blue oil test tool, which comprises a rod assembly, a transmission assembly and a supporting seat, a first end of a transmission rod of the rod assembly is coaxially and fixedly connected with a valve clack of a wedge gate valve, and a transmission nut of the transmission assembly is sleeved at a second end of the transmission rod through screw-thread fit. The mounting structure of the supporting seat is provided with a transmission cavity for accommodating the transmission assembly; the transmission nut is rotationally installed in the transmission cavity of the installation structure, and the axial end of the transmission nut extends out of the transmission cavity and is used for being connected with a torque wrench. During testing, blue oil is smeared on the sealing face of the valve clack, the torque wrench is used for rotating the transmission nut till the sealing face of the valve clack is in complete contact with the sealing pair of the valve seat, and the torque value of the torque wrench at the moment is recorded. Therefore, the problem that the thrust of the valve clack when the sealing surface of the valve clack and the sealing pair of the valve seat reach a good state cannot be obtained in a conventional blue oil test is solved; meanwhile, the valve closing torque value can be obtained through the torque wrench, and the reliability of the electric wedge gate valve after maintenance is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of test fixtures, in particular to a blue oil test fixture for a wedge-type gate valve. Background Art

[0002] The wedge gate valve is a type of gate valve. It is named because its sealing surface forms a certain angle with the vertical center line, that is, the two sealing surfaces form a wedge shape. It generally includes a valve disc, a valve seat and a valve stem. During the disassembly and maintenance process, after the valve disc and the valve seat sealing surfaces are ground, the sealing pair between the valve disc and the valve seat needs to be inspected, usually using a blue oil test. Apply blue oil to the valve disc sealing surface, and when the valve disc and the valve seat are in contact, the state of the sealing pair is judged by observing the imprint on the valve disc sealing surface. The conventional wedge gate valve blue oil test uses the free fall of the valve stem and valve disc to provide the valve disc thrust, so that the valve disc is in full contact with the valve seat, and then lifts the valve stem assembly. The state of the valve sealing pair is judged by observing the blue oil imprint where the valve disc contacts the valve seat. This method has the risk of damaging the sealing surface, and may introduce industrial safety risks during operation.

[0003] For electric wedge gate valves, the valve seal is achieved by applying thrust to the valve stem assembly through the electric actuator, so that the valve disc is in full contact with the valve seat and produces slight elastic deformation. When the electric wedge gate valve is overhauled, the conventional blue oil test cannot obtain the thrust applied to the valve stem assembly when the sealing surface is in contact, and the sealing of the valve cannot be guaranteed under the electric operation state after the overhaul; if the output torque value of the electric head is increased, the valve seat may be deformed and cause valve failure. Utility Model Content

[0004] In view of some shortcomings of the above-mentioned prior art, the purpose of the utility model is to provide a wedge-type gate valve blue oil test tooling, which is used to solve the problem in the prior art that the valve stem assembly cannot obtain appropriate thrust during the blue oil test of the wedge-type gate valve. When the valve disc of the blue oil test of the electric wedge-type valve gate is in full contact with the valve seat sealing pair, the torque value at this time can be used as a reference value for the valve closing torque, that is, to solve the problem of optimizing the valve closing torque value of the electric wedge-type valve gate.

[0005] To achieve the above-mentioned purpose and other related purposes, the utility model provides a wedge-type gate valve blue oil test tool, including: a rod assembly, the rod assembly includes a transmission rod, the first end of the transmission rod is coaxially fixedly connected with the valve disc of the wedge-type gate valve; a transmission assembly, the transmission assembly includes a transmission nut, the transmission nut is threadedly mounted on the second end of the transmission rod opposite to the first end; and a support seat, the connection structure of the first end of the support seat is fixed on the flange surface of the wedge-type gate valve, and the mounting structure of the second end of the support seat opposite to the first end, the mounting structure is provided with a transmission cavity for accommodating the transmission assembly; wherein the transmission nut of the transmission assembly is installed in the transmission cavity of the mounting structure, and one axial end extends outside the transmission cavity, for connecting a torque wrench.

[0006] In one embodiment of the utility model, the rod assembly also includes a connecting head and a connecting stud, the first end of the connecting head is connected to the valve disc, the second end of the connecting head opposite to the first end is threadedly connected to one end of the connecting stud, and the other end of the connecting stud is threadedly connected to the first end of the transmission rod.

[0007] In one embodiment of the utility model, the first end of the connecting head is an inverted T-shaped portion, and is cooperated in the T-shaped groove of the corresponding end of the valve disc, the second end of the connecting head is axially provided with a second threaded blind hole, one end of the connecting stud is inserted into the second threaded blind hole and threadedly connected, and the first end of the transmission rod is axially provided with a first threaded blind hole, one end of the connecting stud is inserted into the first threaded blind hole and threadedly connected.

[0008] In one embodiment of the utility model, the transmission assembly includes a limit screw plug, a friction-reducing flat washer, a transmission nut and a thrust bearing. The limit screw plug is coaxially fixedly installed at one end of the connecting structure close to the transmission cavity. One end of the transmission nut is in active contact with the corresponding end face of the limit screw plug through the friction-reducing flat washer, and the other end of the transmission nut is in rolling contact with the inner wall of the transmission cavity through the thrust bearing, so that the transmission nut is coaxially rotatably installed in the transmission cavity, and the second end of the transmission rod passes through the transmission nut and is threadedly connected to it.

[0009] In one embodiment of the utility model, the ports at both ends of the transmission cavity extend horizontally along its radial direction toward its center to form a first limit platform and a second limit platform, the first limit platform is used for axially limiting the limit screw plug, and the second limit platform is used for axially limiting the transmission nut.

[0010] In one embodiment of the utility model, the outer cylindrical surface of the limit screw plug is a step surface, and the step surface includes a large cylindrical surface I and a small cylindrical surface I. The large cylindrical surface I of the limit screw plug is correspondingly threadedly connected to the transmission inner cavity, and one end thereof is in movably contact with the wear-reducing flat pad. The other end of the large cylindrical surface I of the limit screw plug is in contact with the first limit platform, and the small cylindrical surface I of the limit screw plug extends out of the transmission cavity at one end close to the connecting structure; the second end of the transmission rod is clearance-fitted through the plug hole of the limit screw plug.

[0011] In one embodiment of the utility model, the outer cylindrical surface of the transmission nut is a step surface, the step surface includes a large cylindrical surface II, a middle cylindrical surface and a small cylindrical surface II, one end of the large cylindrical surface II of the transmission nut contacts with a wear-reducing flat washer, the other end of the large cylindrical surface II of the transmission nut contacts with one end of a thrust bearing, and the other end of the thrust bearing contacts with the second limit platform of the transmission cavity.

[0012] In one embodiment of the utility model, the middle cylindrical surface of the transmission nut extends out of an end of the transmission cavity away from the connection structure, and a rectangular surface is provided on the small cylindrical surface II of the transmission nut for installing a torque wrench.

[0013] In one embodiment of the utility model, the support seat includes a bottom plate, four connecting columns and a top block. The bottom plate is a connecting structure and is fixed on the flange surface of the wedge-type gate valve. The top block is a mounting structure and is provided with a transmission cavity. The bottom plate and the top block are relatively parallel and arranged at intervals. The four connecting columns are evenly arranged between the bottom plate and the top block. Each connecting column is parallel to the transmission rod, and its two ends are respectively fixedly connected to the bottom plate and the top block.

[0014] In one embodiment of the utility model, the bottom plate is a square plate, a circular hole for passing the transmission rod is opened in the middle of the bottom plate, four countersunk holes are evenly opened around the circular hole, and waist-shaped grooves are correspondingly opened at four right angles of the bottom plate. The waist-shaped grooves are arranged along the length direction of the bottom plate, and the bottom plate is fixedly installed on the flange surface of the wedge gate valve by the one-to-one cooperation of bolts and waist-shaped grooves.

[0015] The beneficial technical effects of the utility model include at least:

[0016] (1) The utility model provides a wedge-type gate valve blue oil test fixture, including a rod assembly, a transmission assembly and a support seat, the rod assembly includes a transmission rod, the first end of the transmission rod is coaxially fixedly connected to the valve disc of the wedge-type gate valve, the transmission assembly includes a transmission nut, the transmission nut is threadedly sleeved on the second end of the transmission rod, the connection structure of the first end of the support seat is fixed to the flange surface of the wedge-type gate valve, the second end of the support seat is a mounting structure, the mounting structure is provided with a transmission cavity for accommodating the transmission assembly; the transmission nut is installed in the transmission cavity of the mounting structure, and one axial end extends to the outside of the transmission cavity, and is used to connect a torque wrench. During the test, apply blue oil on the sealing surface of the valve disc, use a torque wrench to rotate the transmission nut, so that the transmission rod pushes the valve disc to move vertically downward until the sealing surface of the valve disc is completely in contact with the sealing pair of the valve seat, and record the torque value of the torque wrench at this time; rotate the transmission nut in the opposite direction, the transmission rod drives the valve disc to lift, check the contact of the blue oil test on the sealing surface of the valve disc, if there is no abnormality, the recorded torque value is used as the reference value for the closing torque setting of the electric wedge gate valve; if the sealing pair inspection fails, the sealing pair of the valve seat is ground again, and the blue oil test process is repeated until the sealing pair inspection passes. Therefore, the utility model solves the problem that the conventional blue oil test cannot obtain the valve disc thrust when the sealing surface of the valve disc and the sealing pair of the valve seat are in a good state; at the same time, when the sealing surface of the valve disc and the sealing pair of the valve seat are in a good state, the valve disc thrust can be measured by a torque wrench, and the closing torque value setting of the electric actuator can be optimized to improve the reliability of the electric wedge gate valve after maintenance.

[0017] (2) The utility model is provided with a support seat, and a transmission cavity for accommodating a transmission assembly is opened on the mounting structure of the support seat; the transmission nut of the transmission assembly is installed in the transmission cavity, and the limit screw plug is fixedly installed in the transmission cavity, and is kept coaxially arranged with the transmission rod, so that the overall axial stability of the utility model is good, the force direction during the test is accurate, and the efficiency and accuracy of the blue oil test are guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a cross-sectional view of a blue oil test tool for a wedge-type gate valve in one embodiment of the utility model;

[0020] Figure 2 A cross-sectional view of a transmission nut in one embodiment of the utility model;

[0021] Figure 3 for Figure 2 A top view of

[0022] Figure 4 A cross-sectional view of a limit screw plug in one embodiment of the utility model;

[0023] Figure 5 for Figure 4 Bottom view of

[0024] Figure 6 This is a schematic diagram of a bottom plate in one embodiment of the utility model;

[0025] Component number description: transmission rod 11, connecting head 12, connecting stud 13, transmission nut 21, large cylindrical surface II 211, medium cylindrical surface 212, small cylindrical surface II 213, limit screw plug 22, large cylindrical surface I 221, small cylindrical surface I 222, wear-reducing flat washer 23, transmission nut 21, thrust bearing 24, support seat 3, connecting structure 31, round hole 311, countersunk hole 312, waist-shaped groove 313, mounting structure 32, transmission cavity 321, first limit platform 322, second limit platform 323, connecting column 33, valve disc 41, flange surface 42 of wedge-type gate valve, valve seat 43, nut 5. DETAILED DESCRIPTION

[0026] The following describes the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and the features in the embodiments can be combined with each other without conflict. It should also be understood that the terms used in the embodiments of the present invention are intended to describe specific implementation schemes, rather than to limit the scope of protection of the present invention. The test methods for which specific conditions are not specified in the following examples are usually carried out under conventional conditions or under the conditions recommended by the manufacturers.

[0027] See also Figures 1 to 6. It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the utility model, so they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects and purposes that can be achieved by the utility model, should still fall within the scope of the technical content disclosed by the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the utility model. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the utility model without substantially changing the technical content.

[0028] When numerical ranges are given in the embodiments, it should be understood that unless otherwise specified in the present invention, both endpoints of each numerical range and any value between the two endpoints can be selected. Unless otherwise defined, all technical and scientific terms used in the present invention are in accordance with the prior art mastery of those skilled in the art and the description of the present invention, and any prior art methods, equipment and materials similar or equivalent to the methods, equipment and materials in the embodiments of the present invention can also be used to implement the present invention.

[0029] See also Figure 1 The technical solution of the utility model is described in detail below in conjunction with specific embodiments:

[0030] The utility model provided by the embodiment of the utility model provides a wedge-type gate valve blue oil test tool, including a rod assembly, a transmission assembly and a support seat 3, the rod assembly includes a transmission rod 11, the first end of the transmission rod 11 is coaxially fixedly connected with the valve disc 41 of the wedge-type gate valve, the transmission assembly includes a transmission nut 21, the transmission nut 21 is sleeved on the second end of the transmission rod 11 opposite to the first end thereof through threaded matching, and the connection structure 31 of the first end of the support seat 3 is fixed on the flange surface 42 in the wedge-type gate valve. The mounting structure 32 of the second end of the support seat 3 opposite to the first end thereof, the mounting structure 32 is provided with a transmission cavity 321 for accommodating the transmission assembly. Among them, the transmission nut 21 of the transmission assembly is rotatably mounted in the transmission cavity 321 of the mounting structure 32, and one axial end extends to the outside of the transmission cavity 321, for connecting a torque wrench. During the blue oil test, apply blue oil on the sealing surface of the valve disc 41, use a torque wrench to rotate the transmission nut 21, so that the transmission rod 11 pushes the valve disc 41 to move vertically downward until the sealing surface of the valve disc 41 is completely in contact with the sealing pair of the valve seat 43, and record the torque value of the torque wrench at this time; rotate the transmission nut 21 in the opposite direction, and the transmission rod 11 drives the valve disc 41 to lift, and check the blue oil test contact of the sealing surface of the valve disc 41. If there is no abnormality, the recorded torque value is used as a reference value for the closing torque setting of the electric wedge gate valve; if the sealing pair inspection fails, grind the sealing pair of the valve seat 43 again, and repeat the blue oil test process until the sealing pair inspection passes. Therefore, the utility model solves the problem that the conventional blue oil test cannot obtain the thrust of the valve flap 41 when the sealing surface of the valve flap 41 and the sealing pair of the valve seat 43 are in a good state; at the same time, the thrust of the valve flap 41 when the sealing surface of the valve flap 41 and the sealing pair of the valve seat 43 are in a good state can be measured by a torque wrench, the valve closing torque value setting of the electric actuator can be optimized, and the reliability of the electric wedge gate valve after maintenance is improved.

[0031] In one embodiment of the utility model, the rod assembly further includes a connector 12 and a connecting stud 13, the first end of the connector 12 is connected to the valve disc 41, the second end of the connector 12 opposite to the first end is threadedly connected to one end of the connecting stud 13, and the other end of the connecting stud 13 is threadedly connected to the first end of the transmission rod 11. The first end of the connector 12 is an inverted T-shaped portion, and is matched and arranged in the T-shaped groove at the corresponding end of the valve disc 41, the second end of the connector 12 is axially provided with a second threaded blind hole, one end of the connecting stud 13 is inserted into the second threaded blind hole and threadedly connected, the first end of the transmission rod 11 is axially provided with a first threaded blind hole, one end of the connecting stud 13 is inserted into the first threaded blind hole and threadedly connected.

[0032] In one embodiment of the utility model, the transmission assembly includes a stopper screw plug 22, a friction-reducing flat washer 23, a transmission nut 21 and a thrust bearing 24. The stopper screw plug 22 is coaxially fixedly installed at one end of the connection structure 31 close to the transmission cavity 321. One end of the transmission nut 21 is in active contact with the corresponding end face of the stopper screw plug 22 through the friction-reducing flat washer 23. The other end of the transmission nut 21 is in rolling contact with the inner wall of the transmission cavity 321 through the thrust bearing 24, so that the transmission nut 21 is coaxially rotatably installed in the transmission cavity 321. The second end of the transmission rod 11 passes through the transmission nut 21 and is threadedly connected thereto. The ports at both ends of the transmission cavity 321 extend horizontally along the radial direction toward the center thereof to form a first stopper 322 and a second stopper 323. The first stopper 322 is used for axially limiting the stopper screw plug 22, and the second stopper 323 is used for axially limiting the transmission nut 21.

[0033] See also Figure 2-Figure 3 The outer cylindrical surface of the transmission nut 21 is a step surface, and the step surface includes a large cylindrical surface II211, a middle cylindrical surface 212, and a small cylindrical surface II213. One end of the large cylindrical surface II211 of the transmission nut 21 contacts the anti-friction flat washer 23, and the other end of the large cylindrical surface II211 of the transmission nut 21 contacts one end of the thrust bearing 24. The other end of the thrust bearing 24 contacts the second limit platform 323 of the transmission cavity 321. The middle cylindrical surface 212 of the transmission nut 21 extends out of the end of the transmission cavity 321 away from the connection structure 31, and a rectangular surface is provided on the small cylindrical surface II213 of the transmission nut 21 for mounting a torque wrench.

[0034] See also Figure 4-Figure 5 The outer circumference of the limit screw plug 22 is a step surface, which includes a large cylindrical surface Ⅰ221 and a small cylindrical surface Ⅰ222. The large cylindrical surface Ⅰ221 of the limit screw plug 22 is correspondingly threaded with the transmission inner cavity 321, and one end thereof is in active contact with the anti-friction flat washer 23. The other end of the large cylindrical surface Ⅰ221 of the limit screw plug 22 is in contact with the first limit platform 322. The small cylindrical surface Ⅰ222 of the limit screw plug 22 extends out of the end of the transmission cavity 321 close to the connecting structure 31, and the outer circumference of the small cylindrical surface Ⅰ222 is milled into a flat surface for easy installation and tightening. The second end of the transmission rod 11 passes through the plug hole of the limit screw plug 22 with clearance fit.

[0035] See also Figure 6In one embodiment of the utility model, the support seat 3 includes a bottom plate, four connecting columns 33 and a top block. The bottom plate is a connecting structure 31 and is fixed on the flange surface 42 of the wedge gate valve. The top block is a mounting structure 32 and is provided with a transmission cavity 321. The bottom plate and the top block are relatively parallel and arranged at intervals. The four connecting columns 33 are evenly arranged between the bottom plate and the top block. Each connecting column 33 is parallel to the transmission rod 11, and the two ends are respectively fixedly connected to the bottom plate and the top block. The bottom plate is a square plate. A circular hole 311 for passing the transmission rod is opened in the middle of the bottom plate. Four countersunk holes 312 are evenly opened around the circular hole 311. The four right angles of the bottom plate are correspondingly provided with waist-shaped grooves 313. The waist-shaped grooves 313 are arranged along the length direction of the bottom plate. The bottom plate is fixedly installed on the flange surface 42 of the wedge gate valve by the one-to-one matching of bolts and waist-shaped grooves 313.

[0036] In summary, the working principle of the wedge-type gate valve blue oil test fixture of the utility model is as follows: screw the threaded ends of the four connecting columns 33 into the threaded holes of the mounting structure 32, install the thrust bearing 24, the transmission nut 21 and the anti-friction flat washer 23 into the transmission cavity 321 in sequence, and then manually screw the limit screw plug 22 into the transmission cavity 321 and tighten it manually so that it is fixedly installed in the transmission cavity 321 through the thread. Install the other end of each connecting column 33 into the countersunk hole 312 of the base plate, and use the bolt 5 to connect and tighten the base plate with each connecting column 33. Connect the transmission rod 11 and the connector 12 using the connecting stud 13, and insert the transmission rod 11, the connecting stud 13 and the connector 12 from the circular hole 311 of the base plate until the second end of the transmission rod 11 contacts the transmission nut 21, and then rotate the transmission rod 11 counterclockwise to screw the thread into the transmission nut 21 until the transmission rod 11 cannot rise. Apply blue oil on the sealing surface of the valve disc 41, fit the first end of the connector 12 into the T-shaped portion in the T-slot at the corresponding end of the valve disc 41, place the bottom plate on the flange surface 42 of the wedge gate valve, and use the studs and nuts provided with the valve to fix the bottom plate to the flange in the valve. Use a torque wrench to rotate the transmission nut 21 clockwise to convert its rotational motion into the linear motion of the transmission rod 11. The transmission rod assembly pushes the valve disc 41 to move vertically downward until the valve disc 41 is in full contact with the valve seat 43 sealing pair, and record the torque value of the torque wrench at this time; rotate the transmission nut 21 counterclockwise to lift the valve disc 41 and check the contact of the sealing surface blue oil test. If there is no abnormality, the recorded torque value is used as a reference value for the closing torque setting of the electric wedge gate valve, which can optimize the closing torque value setting of the electric actuator and improve the reliability of the electric wedge gate valve after maintenance. If the sealing pair inspection fails, grind the sealing pair again and repeat the blue oil test process until the sealing pair inspection passes.

[0037] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A wedge gate valve blue oil test tool, characterized in that: include: A rod assembly, the rod assembly comprising a transmission rod (11), a first end of the transmission rod (11) being coaxially fixedly connected to a valve disc (41) of a wedge-type gate valve; A transmission assembly, the transmission assembly comprising a transmission nut (21), the transmission nut (21) being sleeved on a second end of the transmission rod (11) opposite to the first end thereof through threaded engagement; and A support seat (3), a connection structure (31) at a first end of the support seat (3) being fixed on a flange surface (42) in a wedge-type gate valve, and a mounting structure (32) at a second end of the support seat (3) opposite to the first end thereof, wherein the mounting structure (32) is provided with a transmission cavity (321) for accommodating the transmission assembly; The transmission nut (21) of the transmission assembly is installed in the transmission cavity (321) of the installation structure (32), and one end of the transmission nut 21 extends axially outside the transmission cavity (321) for connecting a torque wrench.

2. The wedge gate valve blue oil test tooling according to claim 1 is characterized in that: The rod assembly also includes a connecting head (12) and a connecting stud (13), the first end of the connecting head (12) is connected to the valve flap (41), the second end of the connecting head (12) opposite to the first end is threadedly connected to one end of the connecting stud (13), and the other end of the connecting stud (13) is threadedly connected to the first end of the transmission rod (11).

3. The wedge gate valve blue oil test tooling according to claim 2 is characterized in that: The first end of the connecting head (12) is an inverted T-shaped portion and is arranged in a T-shaped groove at the corresponding end of the valve disc (41); the second end of the connecting head (12) is axially provided with a second threaded blind hole, one end of the connecting stud (13) is inserted into the second threaded blind hole and is threadedly connected; the first end of the transmission rod (11) is axially provided with a first threaded blind hole, one end of the connecting stud (13) is inserted into the first threaded blind hole and is threadedly connected.

4. The wedge gate valve blue oil test tooling according to claim 1 is characterized in that: The transmission assembly comprises a limit screw plug (22), a friction-reducing washer (23), a transmission nut (21) and a thrust bearing (24); the limit screw plug (22) is coaxially fixedly mounted on one end of the transmission cavity (321) close to the connecting structure (31); one end of the transmission nut (21) is in active contact with the corresponding end faces of the limit screw plug (22) through the friction-reducing washer (23); the other end of the transmission nut (21) is in rolling contact with the inner wall of the transmission cavity (321) through the thrust bearing (24), so that the transmission nut (21) is coaxially rotatably mounted in the transmission cavity (321); the second end of the transmission rod (11) passes through the transmission nut (21) and is threadedly connected thereto.

5. The wedge gate valve blue oil test tooling according to claim 4 is characterized in that: The ports at both ends of the transmission cavity (321) extend horizontally along its radial direction toward its center to form a first limit platform (322) and a second limit platform (323), wherein the first limit platform (322) is used for axially limiting the limit screw plug (22), and the second limit platform (323) is used for axially limiting the transmission nut (21).

6. The wedge gate valve blue oil test tooling according to claim 5 is characterized in that: The outer cylindrical surface of the limit screw plug (22) is a stepped surface, and the stepped surface includes a large cylindrical surface I (221) and a small cylindrical surface I (222); the large cylindrical surface I (221) of the limit screw plug (22) is correspondingly threadedly connected to the transmission cavity (321), one end of which is in active contact with the anti-friction flat washer (23); the other end of the large cylindrical surface I (221) of the limit screw plug (22) is in contact with the first limit platform (322), and the small cylindrical surface I (222) of the limit screw plug (22) extends out of the transmission cavity (321) at one end close to the connecting structure (31); the second end of the transmission rod (11) passes through the plug hole of the limit screw plug (22) with clearance fit.

7. The wedge gate valve blue oil test tooling according to claim 5 is characterized in that: The outer cylindrical surface of the transmission nut (21) is a stepped surface, and the stepped surface includes a large cylindrical surface II (211), a middle cylindrical surface (212) and a small cylindrical surface II (213); one end of the large cylindrical surface II (211) of the transmission nut (21) contacts the wear-reducing flat washer (23); the other end of the large cylindrical surface II (211) of the transmission nut (21) contacts one end of the thrust bearing (24); and the other end of the thrust bearing (24) contacts the second limit platform (323) of the transmission cavity (321).

8. The wedge gate valve blue oil test tooling according to claim 7 is characterized in that: The middle cylindrical surface (212) of the transmission nut (21) extends out of the transmission cavity (321) at one end away from the connection structure (31), and a rectangular surface is provided on the small cylindrical surface II (213) of the transmission nut (21) for mounting a torque wrench.

9. The wedge gate valve blue oil test tooling according to claim 1 is characterized in that: The support seat (3) comprises a bottom plate, four connecting columns (33) and a top block, wherein the bottom plate is the connecting structure (31) and is fixed on the flange surface (42) in the wedge-type gate valve, and the top block is the mounting structure (32) and is provided with the transmission cavity (321); the bottom plate and the top block are relatively parallel and arranged at intervals, and the four connecting columns (33) are evenly arranged between the bottom plate and the top block, and each connecting column (33) is parallel to the transmission rod (11), and the two ends of the connecting column (33) are respectively fixedly connected to the bottom plate and the top block.

10. The wedge gate valve blue oil test tooling according to claim 9, characterized in that: The bottom plate is a square plate, a circular hole (311) for passing the transmission rod is provided in the middle of the bottom plate, four countersunk holes (312) are evenly provided around the circular hole (311), waist-shaped grooves (313) are provided at four right angles of the bottom plate, and the waist-shaped grooves (313) are arranged along the length direction of the bottom plate. The bottom plate is fixedly mounted on the flange surface (42) of the wedge-type gate valve by the one-to-one matching of bolts and waist-shaped grooves (313).

Images