Rotary mechanism of plug valve

Abstract

The invention provides a plug valve rotating mechanism which comprises a valve element assembly and a driving assembly, and the driving assembly can drive the valve element assembly to reciprocate between a first position and a second position in the first direction and rotate in the second direction; the valve element assembly comprises a fixing plate and a valve element, the pin is movably arranged in the pin hole; the movable plate comprises a first clamping hole and a second clamping hole which are communicated with each other, the first clamping hole is used for being clamped and matched with a pin, the second clamping hole is used for being clamped and matched with a valve rod of the plug valve, and the movable plate can reciprocate between a third position and a fourth position in the third direction; when the valve element assembly moves to the first position, the pin abuts against the valve rod of the plug valve and is separated from the first clamping hole, and the movable plate is located at the third position so that the valve rod of the plug valve can be clamped into the second clamping hole. When the valve element assembly moves to the second position, the pin is separated from the valve rod of the plug valve, and the pin is matched with the first clamping hole in a clamped mode so that the movable plate can be limited to the fourth position.

Description

Technical Field

[0001] The present application relates to the technical field of stove testing, and in particular to a plug valve rotating mechanism. Background Art

[0002] The plug valve of the stove needs to be tested before leaving the factory, such as air tightness test. At present, most of the plug valve tightness tests are done manually, which is not only inefficient, but also affected by human emotions, fatigue and other factors, and the reliability of the test results is poor. Summary of the invention

[0003] The present application provides a plug valve rotation mechanism that can automatically realize the downward pressing and rotating operations of the plug valve stem, thereby realizing the air tightness detection of the plug valve and improving the detection efficiency and detection reliability.

[0004] The plug valve rotation mechanism of the present application comprises a valve core assembly and a driving assembly, wherein the driving assembly can drive the valve core assembly to reciprocate between a first position and a second position in a first direction and drive the valve core assembly to rotate in a second direction; the valve core assembly comprises: a fixed plate, the fixed plate comprises a pin hole; a pin, the pin is movably arranged in the pin hole; and a movable plate, the movable plate comprises a first clamping hole and a second clamping hole connected to each other, the first clamping hole is used for clamping with the pin, and the second clamping hole is used for clamping with the valve stem of the plug valve, and the movable plate can reciprocate between a third position and a fourth position in a third direction relative to the fixed plate; wherein, when the valve core assembly moves to the first position, the pin presses against the valve stem of the plug valve and disengages from the first clamping hole, and the movable plate is in the third position, so that the valve stem of the plug valve is clamped into the second clamping hole; when the valve core assembly moves to the second position, the pin disengages from the valve stem of the plug valve, and the pin is clamped with the first clamping hole to limit the movable plate to the fourth position.

[0005] In some embodiments, the movable plate includes an upper plate body and a lower plate body connected to each other, the first clamping hole passes through the upper plate body and the lower plate body, and the second clamping hole passes through the upper plate body and the lower plate body; the fixed plate is arranged between the upper plate body and the lower plate body; the pin includes a large cylindrical section and a small cylindrical section located below the large cylindrical section, the small cylindrical section passes through the first clamping hole and the pin hole in sequence, and the large cylindrical section is used to engage with the first clamping hole.

[0006] In some embodiments, the valve core assembly includes: a first spring, which is arranged between the fixed plate and the movable plate; and a fixed bracket, which is in contact and cooperates with the movable plate, wherein when the valve core assembly moves to the first position, the movable plate is pushed to the third position by the deformation recovery force of the first spring, and when the valve core assembly moves from the first position to the second position, the movable plate is moved to the fourth position by the fixed bracket.

[0007] In some embodiments, the fixed bracket includes a wedge-shaped surface, and the movable plate includes a contact surface that contacts and cooperates with the wedge-shaped surface.

[0008] In some embodiments, the upper plate body is provided with a receiving hole; the top surface of the fixed plate is provided with a receiving groove corresponding to the receiving hole, wherein the first spring is located in the receiving hole and the receiving groove, and one end of the first spring is against the fixed plate, and the other end is against the upper plate body.

[0009] In some embodiments, a limiting groove is provided on the bottom surface of the fixing plate, and the lower plate body can be slidably disposed in the limiting groove.

[0010] In some embodiments, a second spring is disposed between the pin and the housing.

[0011] In some embodiments, the valve core assembly further includes a shell, the fixed plate, the movable plate and the pin are arranged in the shell, the shell is provided with a avoidance opening for avoiding the fixed bracket, and the contact surface is located at the avoidance opening.

[0012] In some embodiments, the outer shell includes a lower cover plate, an upper cover plate, a left fixed plate and a right fixed plate, the left side and the right side of the lower cover plate and the upper cover plate are respectively connected by the left fixed plate and the right fixed plate, the lower cover plate and the upper cover plate are respectively provided with the avoidance, and the fixed plate is fixed to the lower cover plate.

[0013] In some embodiments, the ball valve rotation mechanism also includes a mounting frame; the driving assembly includes a cylinder, which is rotatably arranged on the mounting frame in the second direction, and the piston rod of the cylinder is connected to the valve core assembly to drive the valve core assembly to reciprocate in the first direction; the fixed bracket is arranged on the cylinder barrel of the cylinder.

[0014] In some embodiments, the mounting frame includes an upper supporting plate and a lower fixing plate, the upper supporting plate is rotatably mounted with a transmission handle, the transmission handle is disposed on the cylinder barrel of the cylinder, and the lower fixing plate is used for placing a stopcock.

[0015] In the above technical scheme, when the driving mechanism drives the valve core assembly to move in the first direction, it is movably connected through the pin and the pin hole, and while the pin contacts the valve stem to press down the valve stem, the movable plate and the valve stem are snap-fitted by moving relative to the fixed plate to rotate the valve stem. When the pin releases the downward pressure on the valve stem, the movable plate and the fixed plate are self-locked by moving relative to the fixed plate to continue the next plug valve test. That is, the downward pressure and rotation actions are closely connected, the design is ingenious, the level of automation is high, the test efficiency is greatly improved, and manual participation is reduced, thereby improving the reliability of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a structural schematic diagram of the plug valve to be tested;

[0018] Figure 2 The valve diagram of the plug valve to be tested is shown in Figure 1.

[0019] Figure 3 A schematic diagram of a plug valve rotation mechanism provided in some embodiments of the present application;

[0020] Figure 4 An exploded schematic diagram of a valve core assembly provided in some embodiments of the present application;

[0021] Figure 5 An exploded schematic diagram of a partial structure of a valve core assembly provided in some embodiments of the present application;

[0022] Figure 6 A schematic diagram of a drive assembly provided for some embodiments of the present application;

[0023] Figure 7 A schematic diagram of the cylinder installation of the plug valve rotating mechanism provided in some embodiments of the present application;

[0024] Figure 8 A schematic diagram of the exploded installation of a transmission handle and a mounting frame of a plug valve rotating mechanism provided in some embodiments of the present application;

[0025] Fig. 9 Schematic diagram of different working states of the plug valve rotating mechanism provided in some embodiments of the present application, wherein the fixing plate of the valve core assembly is removed;

[0026] Fig.10 for Fig. 9A partially enlarged schematic diagram of the rotating mechanism of the middle plug valve in state B;

[0027] Fig.11 for Fig. 9 Partially enlarged schematic diagram of the rotating mechanism of the middle plug valve in state C.

[0028] Reference numerals:

[0029] Plug valve rotating mechanism 100;

[0030] Valve core assembly 10; housing 11; lower cover plate 111; upper cover plate 112; left fixed plate 113; right fixed plate 114; avoidance openings 111a, 112a; fixed plate 12; pin hole 121; accommodating groove 122; limiting groove 123; movable plate 13; upper plate body 131; lower plate body 132; first clamping hole 133; second clamping hole 134; first upper clamping hole 1311; second upper clamping hole 1312; first lower clamping hole 1321; second lower clamping hole 1322; contact surface 1313; pin 14; large cylindrical section 141; small cylindrical section 142; second spring 15; first spring 16;

[0031] Driving assembly 20; cylinder 21; fixing bracket 22; wedge surface 221;

[0032] Mounting frame 30; upper support plate 31; lower fixing plate 32; transmission handle 23; mounting hole 311 washer 312; spring collar 313;

[0033] Plug valve 200; valve stem 210; pin flat 211. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0036] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0037] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0038] In the description of the embodiments of the present application, it should be noted that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the application is usually placed when in use, or the orientation or positional relationship commonly understood by those skilled in the art, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0039] Reference Figure 1 and Figure 2 , Figure 1 It is the structural schematic diagram of the plug valve to be tested. Figure 2 The figure is a simplified diagram of the plug valve to be tested.

[0040] The stopcock 200 of the stove is provided with two valves connected in series (such as Figure 2 ), the valve stem 210 of the plug valve 200 is pressed down and maintained in the pressed state, valve A is turned on, and valve B is closed. At this time, the air tightness of the valve gas inlet to valve B section and valve B can be detected; the valve stem 210 of the plug valve is kept in the pressed state and the valve stem 210 is rotated counterclockwise, the valve stem 210 is reset to release the pressure and maintained at a certain rotation angle. In this state, valve A is closed, and valve B is turned on. At this time, the air tightness of the valve gas inlet to valve A section and valve A can be detected.

[0041] Typically, the valve stem 210 of the plug valve is designed as follows: a portion of the cylindrical valve stem 210 is circumferentially milled to form a pin plane 211 , so that the pin plane 211 is clamped to rotate the valve stem 210 .

[0042] In the related art, the operations of pressing down and rotating the valve stem 210 are all done manually, which is not only inefficient but also has poor reliability.

[0043] In view of the above-mentioned problems, an embodiment of the present application provides a plug valve rotation mechanism, which can automatically realize the pressing down and rotating operations of the plug valve stem, thereby realizing the air tightness detection of the plug valve and improving the detection efficiency and detection reliability.

[0044] Reference Figure 3-Figure 11 The present application provides a plug valve rotation mechanism 100 , including a valve core assembly 10 and a drive assembly 20 .

[0045] The driving assembly 20 can drive the valve core assembly 10 to reciprocate between a first position and a second position in a first direction, and can drive the valve core assembly 10 to rotate in a second direction.

[0046] The first direction is the direction in which the valve core assembly 10 moves toward or away from the plug valve 200. For example, when the plug valve 200 is located below the valve core assembly 10, the first direction is the up-down direction, which can also be called the vertical direction; the drive assembly 20 can drive the valve core assembly 10 to move downward to the first position to press the valve stem 210 of the plug valve, and the drive assembly 20 can also drive the valve core assembly 10 to move upward to the second position to release the downward pressure on the valve stem 210.

[0047] The second direction is the direction in which the valve core assembly 10 rotates around the axis extending in the first direction. For example, when the first direction is the up-down direction, the drive assembly 20 can drive the valve core assembly 10 to rotate around the axis extending in the up-down direction to rotate the valve stem 210 when the valve stem 210 is pressed down.

[0048] Reference Figure 4 and Figure 5 The valve core assembly 10 includes a fixed plate 12 , a movable plate 13 and a pin 14 .

[0049] The fixing plate 12 includes a pin hole 121. The pin 14 is movably disposed in the pin hole 121. The extension direction (hole depth direction) of the pin hole 121 is consistent with the first direction. For example, the pin hole 121 extending in the up-down direction is provided on the fixing plate 12. The pin 14 can move up and down in the pin hole 121.

[0050] The movable plate 13 includes a first clamping hole 133 and a second clamping hole 134 which are connected to each other. The first clamping hole 133 is used to clamp with the pin 14 to lock the movable plate 13 with the fixed plate 12. The clamping fit may be that the pin 14 contacts and interferes with the first clamping hole 133 to limit the displacement of the movable plate 13 relative to the fixed plate 12. The second clamping hole 134 is used to clamp with the valve stem 210 of the plug valve to rotate the valve stem 210. The clamping fit may be that the valve stem 210 extends into the second clamping hole 134, so that the second clamping hole 134 interferes with the pin plane 211 of the valve stem 210, thereby rotating the valve stem 210.

[0051] The movable plate 13 can reciprocate between a third position and a fourth position in a third direction relative to the fixed plate 12. The third direction is a direction perpendicular or substantially perpendicular to the first direction. For example, when the first direction is an up-and-down direction, the third direction is a horizontal direction, such as a horizontal front-to-back direction. The first clamping hole 133 and the second clamping hole 134 are arranged in the third direction, for example, the second clamping hole 134 is in front of the first clamping hole 133, so that when the movable plate 13 moves to the fourth position, the first clamping hole 133 corresponds to the pin 14, and when the movable plate 13 moves to the third position, the second clamping hole 134 corresponds to the pin 14.

[0052] For example, the fixed plate 12 is a fixed part, and the movable plate 13 is a movable part. The movable plate 13 can move in a substantially horizontal forward and backward direction. When the movable plate 13 moves horizontally backward to the third position, the second clamping hole 134 corresponds to the valve stem 210 of the plug valve and is clamped and matched with the valve stem 210 to rotate the valve stem 210. When the movable plate 13 moves horizontally forward to the fourth position, the first clamping hole 133 corresponds to the pin 14 and is clamped and matched with the pin 14 to lock the movable plate 14 and the fixed plate 12.

[0053] Among them, when the valve core assembly 10 moves to the first position, the pin 14 presses the valve stem 210 of the plug valve and disengages from the first clamping hole 133, and the movable plate 13 moves to the third position so that the valve stem 210 of the plug valve is clamped into the second clamping hole 134; when the valve core assembly 10 moves to the second position, the pin 14 disengages from the valve stem 210 of the plug valve, and the pin 14 is clamped and cooperated with the first clamping hole 133 to limit the movable plate 14 to the fourth position.

[0054] For ease of description, the first direction in this application is described by taking the up-down (vertical) direction as an example, and the third direction in this application is described by taking the horizontal front-back direction as an example. It is understandable that the first direction is not limited to the up-down direction, and can be the left-right direction or other possible directions, depending on the placement position of the plug valve 200 relative to the valve core assembly 10 during the test. It is also understandable that the third direction is not limited to the horizontal front-back direction, and can also be the horizontal left-right direction or other possible horizontal directions.

[0055] For example, in the initial state, refer to Fig. 9 As shown in A, the valve core assembly 10 is not in contact with the plug valve 200, and the pin 14 is engaged with the first clamping hole 133 to limit the movable plate 13 to the fourth position. Fig. 9 Medium B and Fig.10 , the driving assembly 20 drives the valve core assembly 10 to move downward so that the pin 14 contacts the valve stem 210 of the plug valve. When it continues to move downward to the first position, the pin 14 generates downward pressure on the valve stem 210 of the plug valve to open valve A and close valve B. At this time, the air tightness of the valve gas inlet to valve B section and valve B can be detected; in the first position, that is, when the valve stem 210 of the plug valve is kept pressed down, the valve stem 210 of the plug valve simultaneously generates a reaction force on the pin 14, pushing the pin 14 upward along the pin hole 121. At this time, the pin 14 is disengaged from the first clamping hole 133, thereby releasing the restriction on the movable plate 13, and the movable plate 13 moves horizontally backward relative to the fixed plate 12. When it moves to the third position, the valve stem 210 of the plug valve is clamped into the second clamping hole 134 (see Fig. 9 Middle C and Fig.11As shown), in this state, the driving assembly 20 drives the valve core assembly 10 to rotate around the axis extending up and down to rotate the valve stem 210, thereby opening valve B. Then, the driving assembly 20 drives the valve core assembly 10 to move upward, so that the pin 14 gradually disengages from the valve stem 210 of the plug valve, thereby releasing the downward pressure on the valve stem 210, thereby closing valve A. At this time, the air tightness of the gas inlet to valve A section and valve A can be detected; since there is no force between the valve stem 210 and the pin 14, the pin 14 moves downward at this time, and the movable plate 13 moves forward horizontally relative to the fixed plate 12. When it moves to the fourth position, the first clamping hole 133 is engaged with the pin 14, and the movable plate 13 and the fixed plate 12 are locked by the pin 14 to be restricted in the fourth position; then continue to test the next plug valve.

[0056] The plug valve rotation mechanism of the present application is movably connected with the pin and the pin hole when the driving mechanism drives the valve core assembly to move in the first direction, and at the same time when the pin contacts the valve stem to press the valve stem downward, the movable plate and the valve stem are snap-fitted by the movement of the movable plate relative to the fixed plate to rotate the valve stem, and when the pin releases the downward pressure on the valve stem, the movable plate and the fixed plate are self-locked by the movement of the movable plate relative to the fixed plate to continue the next plug valve test, that is, the downward pressure and the rotation actions are closely connected, the design is ingenious, the level of automation is high, the test efficiency is greatly improved, and manual participation is reduced, thereby improving the reliability of the test results.

[0057] In some embodiments, see Figure 4 and Figure 5 The movable plate 13 includes an upper plate body 131 and a lower plate body 132 connected to each other, a first clamping hole 133 passes through the upper plate body 131 and the lower plate body 132, a second clamping hole 134 passes through the upper plate body 131 and the lower plate body 132, and the first clamping hole 133 is larger than the second clamping hole 134. The fixed plate 12 is arranged between the upper plate body 131 and the lower plate body 132. The pin 14 includes a large cylindrical section 141 and a small cylindrical section 142 located below the large cylindrical section 141, the small cylindrical section 142 passes through the first clamping hole 133 and the pin hole 121 in sequence, and the large cylindrical section 141 is used to engage with the first clamping hole 133. For example, the large cylindrical section 141 can be integrally formed with the small cylindrical section 142.

[0058] When the pin 14 is lifted up by the valve stem 211 , the large cylindrical section 141 is disengaged from the first engaging hole 133 , and when the movable plate 13 moves horizontally backward to the third position, the small cylindrical section 142 is located in the second engaging hole 134 .

[0059] By way of example, the movable plate 13 is U-shaped, and includes an upper plate body 131 and a lower plate body 132, and the fixed plate 12 is located between the upper plate body 131 and the lower plate body 132. The first clamping hole 133 includes a first upper clamping hole 1311 provided on the upper plate body 131 and a first lower clamping hole 1321 provided on the lower plate body 132. The second clamping hole 134 includes a second upper clamping hole 1312 provided on the upper plate body 131 and a second lower clamping hole 1322 provided on the lower plate body 132, the first upper clamping hole 1311 is communicated with the second upper clamping hole 1312, and the first upper clamping hole 1311 is larger than the second upper clamping hole 1312, the first lower clamping hole 1321 is communicated with the second lower clamping hole 1322, and the first lower clamping hole 1321 is larger than the second lower clamping hole 1322. The small cylindrical section 142 passes through the first upper clamping hole 1311 , the pin hole 121 and the first lower clamping hole 1321 in sequence, the large cylindrical section 141 is used to be clamped and matched with the first upper clamping hole 1411 , and the second lower clamping hole 1322 is used to be clamped and matched with the valve stem 121 .

[0060] In some embodiments, reference Figure 3 , Figure 4 and Figure 5 The valve core assembly 10 includes: a first spring 16 and a fixing bracket 22 .

[0061] The first spring 16 is disposed between the fixed plate 12 and the movable plate 13 , and the first spring 16 can be deformed in the third direction, that is, the first spring 16 has an elastic restoring force in the third direction.

[0062] The fixed bracket 22 cooperates with the movable plate 13, wherein when the valve core assembly 10 moves to the first position, the movable plate 13 is pushed to the third position by the deformation recovery force of the first spring 16, and when the valve core assembly 10 moves from the first position to the second position, the movable plate 13 is moved to the fourth position by the fixed bracket 22.

[0063] For example, when the valve core assembly 10 moves to the first position, the pin 14 is lifted by the valve stem 210, the large cylindrical section 141 is disengaged from the first clamping hole 133, and the movable plate 13 moves to the third position under the elastic restoring force of the first spring 16. When the valve core assembly 10 moves from the first position to the second position, the fixed bracket 22 is a fixed part, the movable plate 13 is a movable part, the pin 14 gradually disengages from the valve stem 210, and the movable plate 13 moves upward relative to the fixed bracket 22, and the movable plate 13 is moved to the fourth position by the fixed bracket 22. At the same time, the large cylindrical section 141 of the pin 14 is engaged with the first clamping hole 133 to limit the movable plate 13 to the fourth position, and the first spring 16 is compressed.

[0064] Furthermore, the upper plate body 131 is provided with a receiving hole 1314, and the top surface of the fixed plate 12 is provided with a receiving groove 122 corresponding to the receiving hole 1314, wherein the first spring 16 is located in the receiving hole 1314 and the receiving groove 122, and one end of the first spring 16 is against the fixed plate 12, and the other end is against the upper plate body 131.

[0065] The receiving hole 1314 and the receiving groove 122 together receive the first spring 16 , so that the valve core assembly 10 is more compact in structure.

[0066] Furthermore, a limiting groove 123 is provided on the bottom surface of the fixed plate 12, and the lower plate body 132 is slidably disposed in the limiting groove 123. The limiting groove 123 limits the movement of the movable plate 13 relative to the fixed plate 12, so that the movable plate 13 moves in a horizontal direction to prevent it from falling out.

[0067] In some embodiments, reference Figure 4 , Figure 5 , Fig.10 and Fig.11 The valve core assembly 10 further includes a housing 11, and the fixed plate 12, the movable plate 13 and the pin 14 are arranged in the housing 11. The fixed bracket 22 includes a wedge surface 221, and the movable plate 13 includes a contact surface 1313 that contacts and cooperates with the wedge surface 221. The housing 11 is provided with an avoidance opening for avoiding the fixed bracket 22, and the contact surface 1313 is located at the avoidance opening.

[0068] During the up and down movement of the valve core assembly 10, the movable plate 13 moves up and down relative to the fixed bracket 22, and the inclined surface of the wedge surface 221 of the fixed bracket 22 is always in contact with the contact surface 1313 of the movable plate 13 to generate interference. During the downward movement of the movable plate 13 relative to the fixed bracket 22, the interference of the wedge surface 221 with the contact surface 1313 at the horizontal rear gradually decreases, so that the first spring 16 gradually recovers its deformation to push the movable plate 13 to move backward. During the upward movement of the movable plate 13 relative to the fixed plate 22, the interference of the wedge surface 221 with the contact surface 1313 at the horizontal front gradually increases, so that the fixed bracket 22 drives the movable plate 13 to move forward, forcing the first spring 16 to compress.

[0069] In some embodiments, a second spring 15 is provided between the pin 14 and the housing 11. When the pin 14 presses down the valve stem 210, the second spring 15 is compressed, and when the pin 14 is separated from the valve stem 210, the second spring 15 recovers its deformation. The second spring 15 acts as a buffer for the pin 14 to press down the valve stem 210, preventing the valve stem 210 from being damaged by excessive downward pressure. In addition, when the pin 14 is separated from the valve stem 210, the second spring 15 acts to push the pin 14 to fall, preventing the pin 14 from being stuck during the falling process.

[0070] In some embodiments, reference Figure 4The housing 11 includes a lower cover plate 111, an upper cover plate 112, a left fixing plate 113 and a right fixing plate 114. The left and right sides of the lower cover plate 111 and the upper cover plate 112 are detachably connected through the left fixing plate 113 and the right fixing plate 114, respectively. The lower cover plate 111 and the upper cover plate 112 are respectively provided with avoidance openings 111a and 112a. The fixing plate 12 is fixed to the lower cover plate 111. The housing 11 is a detachable split structure, which is convenient for installation and maintenance.

[0071] In some embodiments, see Figure 6 , Figure 7 and Figure 8 The plug valve rotation mechanism also includes a mounting frame 30, and the driving assembly 20 includes a cylinder 21. The cylinder 21 is arranged on the mounting frame 30 and can rotate in the second direction relative to the mounting frame 21. The piston rod 211 of the cylinder 21 is connected to the valve core assembly 10 and is used to drive the valve core assembly 10 to move in the first direction; the fixed bracket 22 is arranged on the cylinder barrel of the cylinder 21.

[0072] The piston rod 211 of the cylinder 21 is extended and retracted to drive the valve core assembly 10 to move up and down relative to the fixed bracket 22. The fixed bracket 22 is arranged on the cylinder barrel of the cylinder 21, and the overall structure is more compact.

[0073] In some embodiments, see Figure 7 and Figure 8 The mounting frame 30 includes an upper supporting plate 31 and a lower fixing plate 32 . The upper supporting plate 31 is rotatably mounted with a transmission handle 23 , which is fixedly connected to the cylinder barrel of the cylinder 21 . The lower fixing plate 32 is used to place the plug valve 200 .

[0074] The transmission handle 23 may be connected to a power mechanism to drive the transmission handle 23 to rotate relative to the upper support plate 31, thereby driving the cylinder 21, the fixing bracket 22 and the valve core assembly 10 to rotate together. The power mechanism may be, for example, a rotary motor.

[0075] For example, a mounting hole 311 is provided on the upper support plate 31, and the top of the transmission handle 23 is rotatably mounted on the mounting hole 311. For example, the top rotating shaft of the transmission handle 23 is provided with an annular groove, and the top of the transmission handle 23 is rotatably mounted on the mounting hole 311 by cooperating with the spring retaining ring 313 and the annular groove. A gasket 312 can also be provided between the spring retaining ring 313 and the upper support plate 31.

[0076] In some preferred embodiments, see Fig. 9 , Fig.10 and Fig.11 , in the initial state, refer to Fig. 9As shown in A, the valve core assembly 10 is not in contact with the plug valve 200, the valve core assembly 10 is in the second upper position, the pin 14 is engaged with the first engaging hole 133 to limit the movable plate 13 to the fourth position, the first spring 16 is compressed, and the wedge surface 221 of the fixed bracket 22 is in contact with the contact surface 1313 of the movable plate 13.

[0077] When testing the plug valve is required, refer to Fig. 9 Medium B and Fig.10 , the driving assembly 20 drives the valve core assembly 10 to move downward, so that the small cylindrical section 142 of the pin 14 contacts the valve stem 210 of the plug valve. When it continues to move downward to the first position, the pin 14 generates downward pressure on the valve stem 210 of the plug valve to open valve A and close valve B. At this time, the air tightness of the valve gas inlet to valve B and valve B can be detected; in the first position, that is, the valve stem 210 of the plug valve is kept pressed down, and the valve stem 210 of the plug valve generates a reaction force on the pin 14 at the same time, pushing the pin 14 upward along the pin hole 121, and the second The spring 15 is compressed, and the large cylindrical section 141 of the pin 14 is disengaged from the first clamping hole 133, thereby releasing the restriction on the movable plate 13; as the valve core assembly 10 moves downward, the movable plate 13 moves downward relative to the fixed bracket 22, and the horizontal backward interference between the wedge surface 221 of the fixed bracket 22 and the contact surface 1313 of the movable plate 13 gradually decreases, so that the movable plate 13 moves horizontally backward under the elastic restoring force of the first spring 16. When it moves to the third position, the valve stem 210 of the plug valve is clamped in the second clamping hole 134, and the two interfere with each other (see Fig. 9 Middle C and Fig.11 As shown in the figure, in this state, the driving assembly 20 drives the valve core assembly 10 to rotate around the axis extending up and down to rotate the valve stem 210, thereby opening the valve B; then, the driving assembly 20 drives the valve core assembly 10 to move upward, so that the pin 14 gradually separates from the valve stem 210 of the plug valve, and the downward pressure on the valve stem 210 is released, thereby closing the valve A. At this time, the air tightness of the section from the gas inlet to the valve A and the valve A can be detected; since there is no force between the valve stem 210 and the pin 14, at this time the pin 14 is in the second spring 15 restoring force , and because the movable plate 13 moves upward relative to the fixed bracket 22, the horizontal forward interference between the wedge surface 221 of the fixed bracket 22 and the contact surface 1313 of the movable plate 13 gradually increases, and the movable plate 13 moves horizontally forward under the toggle of the fixed bracket 22. When it moves to the fourth position, the first clamping hole 133 is engaged with the large cylindrical section 141 of the pin 14, and the movable plate 13 and the fixed plate 12 are locked by the pin 14 to be restricted to the fourth position; then continue to test the next plug valve.

[0078] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A plug valve rotating mechanism, characterized in that: The invention comprises a valve core assembly and a driving assembly, wherein the driving assembly can drive the valve core assembly to reciprocate between a first position and a second position in a first direction and drive the valve core assembly to rotate in a second direction; the valve core assembly comprises: a fixing plate, the fixing plate comprising a pin hole; a pin, the pin being movably disposed in the pin hole; and A movable plate, the movable plate comprising a first clamping hole and a second clamping hole which are connected to each other, the first clamping hole being used for clamping with the pin, the second clamping hole being used for clamping with the valve stem of the plug valve, and the movable plate being able to reciprocate between a third position and a fourth position in a third direction relative to the fixed plate; Wherein, when the valve core assembly moves to the first position, the pin presses against the valve stem of the plug valve and disengages from the first clamping hole, and the movable plate is in the third position, so that the valve stem of the plug valve is clamped into the second clamping hole; when the valve core assembly moves to the second position, the pin disengages from the valve stem of the plug valve, and the pin is engaged with the first clamping hole to limit the movable plate to the fourth position.

2. The plug valve rotating mechanism according to claim 1, characterized in that: The movable plate comprises an upper plate body and a lower plate body connected to each other, the first clamping hole passes through the upper plate body and the lower plate body, and the second clamping hole passes through the upper plate body and the lower plate body; The fixing plate is arranged between the upper plate body and the lower plate body; The pin includes a large cylindrical section and a small cylindrical section located below the large cylindrical section. The small cylindrical section passes through the first clamping hole and the pin hole in sequence, and the large cylindrical section is used for clamping and matching with the first clamping hole.

3. The plug valve rotating mechanism according to claim 2, characterized in that: The valve core assembly comprises: a first spring, the first spring being arranged between the fixed plate and the movable plate; A fixed bracket is in contact with the movable plate, wherein when the valve core assembly moves to the first position, the movable plate is pushed to the third position by the deformation recovery force of the first spring, and when the valve core assembly moves from the first position to the second position, the movable plate is moved to the fourth position by the fixed bracket.

4. The plug valve rotating mechanism according to claim 3, characterized in that: The fixed bracket includes a wedge-shaped surface, and the movable plate includes a contact surface that contacts and cooperates with the wedge-shaped surface.

5. The plug valve rotating mechanism according to claim 4, characterized in that: The upper plate body is provided with a receiving hole; The top surface of the fixing plate is provided with a receiving groove corresponding to the receiving hole. Wherein, the first spring is located in the accommodating hole and the accommodating groove, and one end of the first spring abuts against the fixing plate, and the other end abuts against the upper plate body.

6. The plug valve rotating mechanism according to claim 5, characterized in that: The bottom surface of the fixing plate is provided with a limiting groove, and the lower plate body is slidably arranged in the limiting groove.

7. The plug valve rotating mechanism according to claim 4, characterized in that: The valve core assembly also includes a shell, the fixed plate, the movable plate and the pin are arranged in the shell, the shell is provided with a avoidance opening for avoiding the fixed bracket, and the contact surface is located at the avoidance opening.

8. The plug valve rotating mechanism according to claim 7, characterized in that: The shell includes a lower cover plate, an upper cover plate, a left fixed plate and a right fixed plate. The left and right sides of the lower cover plate and the upper cover plate are detachably connected through the left fixed plate and the right fixed plate respectively. The lower cover plate and the upper cover plate are respectively provided with the avoidance opening, and the fixed plate is fixed to the lower cover plate.

9. The plug valve rotating mechanism according to claim 7, characterized in that: A second spring is arranged between the pin and the housing.

10. The plug valve rotating mechanism according to any one of claims 3 to 9, characterized in that: The plug valve rotation mechanism also includes a mounting frame; the driving assembly includes a cylinder, which can be rotatably arranged on the mounting frame in the second direction, and the piston rod of the cylinder is connected to the valve core assembly to drive the valve core assembly to reciprocate in the first direction; the fixed bracket is arranged on the cylinder barrel of the cylinder.

11. The plug valve rotating mechanism according to claim 10, characterized in that: The mounting frame comprises an upper supporting plate and a lower fixing plate, wherein the upper supporting plate is provided with a transmission handle rotatably connected to the upper supporting plate, the transmission handle is arranged on the cylinder barrel of the cylinder, and the lower fixing plate is used for placing a plug valve.

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