High-pressure safety valve dismounting tool

Abstract

The utility model relates to the technical field of high-pressure safety valves, in particular to a high-pressure safety valve dismounting tool which comprises a valve, a valve element, a valve rod and a fixing mechanism, the valve element is connected with the valve in a sliding mode, the valve rod is fixedly connected with the valve element, and the fixing mechanism comprises two mounting plates, two motors, two threaded rods, a pressing plate, two nuts and a pressing assembly. The two mounting plates are connected with the valve through bolts, the two motors are fixedly connected with the corresponding mounting plates, the two threaded rods are fixedly connected with the output ends of the corresponding motors, the pressing plate is in threaded connection with the two threaded rods, the two nuts are in threaded connection with the corresponding threaded rods and located above the pressing plate, and the downward pressing assembly is arranged between the valve element and the pressing plate. Through the arrangement of the structure, the problems that in the prior art, a pressing plate needs to be pressed downwards through a hydraulic cylinder, a nut can be taken down, the nut and the hydraulic cylinder need to be disassembled together in the disassembling process, operation is tedious, and labor intensity is large are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of high-pressure safety valves, in particular to a high-pressure safety valve disassembly tool. Background Art

[0002] High-pressure safety valves are mainly used in occasions where pipeline pressure is relatively high. The spring in the clamping device directly above the valve provides a certain clamping force to hold the valve core against the valve. One end of the spring rests on the valve core, and the other end rests on the limit boss at the end of the valve stem. The limit boss rests on the pressure plate above it, and both ends of the pressure plate are sleeved on the yoke rods that are vertically and symmetrically arranged on both sides. When the valve fails and needs to be stopped and disassembled for maintenance, the gas in the pipeline is at normal temperature and pressure, resulting in a large force equally divided on the two locking nuts. The current disassembly method is to manually loosen the locking nuts slowly with a wrench, but the manual disassembly method is inefficient and labor-intensive, and will also affect the accuracy of the yoke rod, which is not conducive to multiple disassembly.

[0003] In the prior art, the patent (CN203125460U) mentions a high-pressure safety valve disassembly tool, wherein a clamping device is provided on the valve, including a pressure plate, a locking nut, a valve stem, a spring and two symmetrical and vertically arranged yoke rods, the two ends of the pressure plate pass through the yoke rods, the locking nut is sleeved on the yoke rods and abuts against the top surface of the pressure plate, the lower end of the valve stem abuts against the valve core, and the spring is arranged on the valve stem between the pressure plate and the valve core, characterized in that: the high-pressure safety valve disassembly tool is vertically installed directly above the valve clamping device, including a hydraulic pump, a hydraulic cylinder and a sleeve coupling, the hydraulic cylinder is vertically placed on the pressure plate, the hydraulic pump is connected to the oil inlet of the hydraulic cylinder, the sleeve coupling passes through the center hole of the hydraulic cylinder core, the bottom of which is threadedly connected to the valve stem, and the top of which is a convex shoulder structure. By arranging an oil cylinder directly above the clamping device, the oil cylinder is used to provide a downward force, so that the locking nut does not bear the force from the spring, so that the locking nut can be easily unscrewed.

[0004] However, the above-mentioned prior art requires that the pressing plate be pressed down by a hydraulic cylinder before the nut can be removed. When disassembling, the nut needs to be disassembled together with the hydraulic cylinder, which results in complicated operation and high labor intensity. Utility Model Content

[0005] The utility model aims to provide a high-pressure safety valve disassembly tool, which solves the problem in the prior art that the nut can only be removed by pressing the pressure plate down through a hydraulic cylinder, and when disassembling, the nut needs to be disassembled together with the hydraulic cylinder, resulting in cumbersome operation and high labor intensity.

[0006] To achieve the above-mentioned purpose, the utility model provides a high-pressure safety valve disassembly tool, including a valve, a valve core, a valve stem and a fixing mechanism, the valve core is slidably connected to the valve and is located above the valve, the valve stem is fixedly connected to the valve core and is located above the valve core, the fixing mechanism includes two mounting plates, two motors, two threaded rods, a pressure plate, two nuts and a pressing assembly, the two mounting plates are bolted to the valve and are located on both sides of the valve core, the two motors are fixedly connected to the corresponding mounting plates and are located above the corresponding mounting plates, the two threaded rods are fixedly connected to the output ends of the corresponding motors and are located above the corresponding motors, the pressure plate is threadedly connected to the two threaded rods and are located above the valve, the two nuts are threadedly connected to the corresponding threaded rods and are located above the pressure plate, and the pressing assembly is arranged between the valve core and the pressure plate.

[0007] Among them, the downward pressure assembly includes a pressure ring, a connecting ring and a spring. The connecting ring is rotatably connected to the pressure plate and is located below the pressure plate. One end of the spring is fixedly connected to the connecting ring, and the other end of the spring is fixedly connected to the pressure ring and covers the top of the valve stem. The pressure ring is arranged above the valve core.

[0008] A clamping ring is arranged at the upper end of the connecting ring, one end of the clamping ring is fixedly connected to the connecting ring, and the other end of the clamping ring is clamped to the pressure plate, and the cross section of the clamping ring is arranged in an L shape.

[0009] Wherein, the high-pressure safety valve disassembly tool also includes a guide assembly, and the guide assembly is arranged between the pressure ring and the connecting ring.

[0010] Wherein, the guide assembly includes a first sleeve and a second sleeve, the first sleeve is slidably connected to the connecting ring and is located below the connecting ring, one end of the second sleeve is fixedly connected to the pressure ring, the other end of the second sleeve is slidably connected to the first sleeve and is located above the first sleeve, and the first sleeve and the second sleeve are both sleeved on the surface of the valve stem.

[0011] The utility model discloses a high-pressure safety valve disassembly tool, the two mounting plates are connected with the valve bolts and are located at both sides of the valve core, the two motors are fixedly connected with the corresponding mounting plates and are located above the corresponding mounting plates, the two threaded rods are fixedly connected with the output ends of the corresponding motors and are located above the corresponding motors, the pressure plate is threadedly connected with the two threaded rods and are located above the valve, the two nuts are threadedly connected with the corresponding threaded rods and are located above the pressure plate, the pressing assembly is arranged between the valve core and the pressure plate, the two threaded rods fix the pressure plate, and the pressing assembly fixes the valve core inside the valve, when disassembling the valve core, the two nuts are removed, the two motors respectively drive the corresponding threaded rods to rotate, so that the pressure plate moves accordingly, and the pressure plate and the pressing assembly are removed, so that the valve core can be disassembled, and the function of the two nuts is to limit the position of the pressure plate, thereby improving stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] 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.

[0013] Figure 1 It is a schematic diagram of the overall structure of the first embodiment of the utility model.

[0014] Figure 2 It is a front view of the first embodiment of the utility model.

[0015] Figure 3 The utility model Figure 2 AA line section view.

[0016] Figure 4 It is an overall structural diagram of the second embodiment of the utility model.

[0017] Figure 5 It is a front view of the second embodiment of the utility model.

[0018] 101-valve, 102-valve core, 103-valve stem, 104-mounting plate, 105-motor, 106-threaded rod, 107-pressure plate, 108-nut, 109-pressure ring, 110-connecting ring, 111-spring, 112-circlip, 201-first sleeve, 202-second sleeve. DETAILED DESCRIPTION

[0019] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0020] First embodiment:

[0021] See also Figure 1 to Figure 3 ,in, Figure 1 It is a schematic diagram of the overall structure of the first embodiment of the utility model. Figure 2 It is a front view of the first embodiment of the utility model. Figure 3 The utility model Figure 2 AA line section view.

[0022] The utility model provides a high-pressure safety valve disassembly tool, including a valve 101, a valve core 102, a valve stem 103 and a fixing mechanism, the fixing mechanism includes two mounting plates 104, two motors 105, two threaded rods 106, a pressure plate 107, two nuts 108 and a pressing component, the pressing component includes a pressure ring 109, a connecting ring 110 and a spring 111. The above-mentioned scheme solves the problem in the prior art that the pressure plate needs to be pressed down by a hydraulic cylinder to remove the nut, and when disassembling, the nut needs to be disassembled together with the hydraulic cylinder, resulting in cumbersome operation and high labor intensity.

[0023] According to the present specific implementation, the valve core 102 is slidably connected to the valve 101 and is located above the valve 101. The valve stem 103 is fixedly connected to the valve core 102 and is located above the valve core 102. The two mounting plates 104 are bolted to the valve 101 and are located on both sides of the valve core 102. The two motors 105 are fixedly connected to the corresponding mounting plates 104 and are located above the corresponding mounting plates 104. The two threaded rods 106 are fixedly connected to the output ends of the corresponding motors 105 and are located above the corresponding motors 105. The pressure plate 107 is connected to the two threaded rods. 106 is threadedly connected and is located above the valve 101. The two nuts 108 are threadedly connected to the corresponding threaded rods 106 and are located above the pressure plate 107. The pressing assembly is arranged between the valve core 102 and the pressure plate 107. When disassembling the valve core 102, the two nuts 108 are removed, and the two motors 105 respectively drive the corresponding threaded rods 106 to rotate, so that the pressure plate 107 moves accordingly. The pressure plate 107 and the pressing assembly are removed, and the valve core 102 can be disassembled. The function of the two nuts 108 is to limit the position of the pressure plate 107, thereby improving stability.

[0024] Among them, the connecting ring 110 is rotatably connected to the pressure plate 107 and is located below the pressure plate 107. One end of the spring 111 is fixedly connected to the connecting ring 110, and the other end of the spring 111 is fixedly connected to the pressure ring 109 and is covered above the valve stem 103. The pressure ring 109 is arranged above the valve core 102. The pressure plate 107 pushes the connecting ring 110, and the spring 111 contracts accordingly, pushing the pressure ring 109, squeezing the valve core 102, and fixing the valve core 102 in the valve 101.

[0025] Secondly, one end of the clamping ring 112 is fixedly connected to the connecting ring 110, and the other end of the clamping ring 112 is clamped with the pressure plate 107. The cross-section of the clamping ring 112 is L-shaped. The clamping ring 112 fixes the pressure plate 107 and the connecting ring 110 together. When installing or disassembling, the pressure ring 109 and the connecting ring 110 can be moved together for easy operation.

[0026] When using the utility model, the two motors 105 drive the threaded rod 106 to rotate, so that the pressure plate 107 pushes the connecting ring 110, and the spring 111 contracts accordingly, pushing the pressure ring 109 to squeeze the valve core 102 and fix the valve core 102 in the valve 101. When disassembling the valve core 102, the two nuts 108 are removed, and the two motors 105 respectively drive the corresponding threaded rod 106 to rotate, so that the pressure plate 107 moves accordingly. The pressure plate 107 and the downward pressure assembly are removed, and the valve core 102 can be disassembled.

[0027] Second embodiment:

[0028] See also Figure 4-5 ,in, Figure 4 It is a schematic diagram of the overall structure of the second embodiment of the utility model. Figure 5 It is a front view of the second embodiment of the utility model.

[0029] On the basis of the first embodiment, the utility model provides a high-pressure safety valve disassembly tool, which also includes a guide assembly, wherein the guide assembly includes a first sleeve 201 and a second sleeve 202. Through the arrangement of the above structure, the position of the spring 111 is restricted to prevent the spring 111 from bending and colliding with the valve stem 103 when it contracts.

[0030] According to this specific embodiment, the guide assembly is disposed between the pressure ring 109 and the connecting ring 110 , and the guide assembly is wrapped around the outer side of the valve stem 103 to prevent the spring 111 from contacting the valve stem 103 .

[0031] Among them, the first sleeve 201 is slidably connected to the connecting ring 110 and is located below the connecting ring 110, one end of the second sleeve 202 is fixedly connected to the pressure ring 109, the other end of the second sleeve 202 is slidably connected to the first sleeve 201 and is located above the first sleeve 201, the first sleeve 201 and the second sleeve 202 are both sleeved on the surface of the valve stem 103, the first sleeve 201 and the second sleeve 202 are covered on the outside of the valve stem 103, when the spring 111 contracts, the first sleeve 201 extends into the interior of the second sleeve 202, which can effectively prevent the spring 111 from hitting the valve stem 103.

[0032] When using the utility model, the two motors 105 drive the threaded rod 106 to rotate, so that the pressure plate 107 pushes the connecting ring 110, and the spring 111 contracts accordingly, pushing the pressure ring 109, squeezing the valve core 102, and fixing the valve core 102 in the valve 101. At the same time, the first sleeve 201 and the second sleeve 202 are covered on the outside of the valve stem 103, and the first sleeve 201 extends into the interior of the second sleeve 202, which can effectively prevent the spring 111 from hitting the valve stem 103.

[0033] What is disclosed above is only one or more preferred embodiments of the present application, and cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of implementing the above embodiments and equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A high-pressure safety valve disassembly tool, comprising a valve, a valve core and a valve stem, wherein the valve core is slidably connected to the valve and is located above the valve, and the valve stem is fixedly connected to the valve core and is located above the valve core, characterized in that: It also includes a fixing mechanism, which includes two mounting plates, two motors, two threaded rods, a pressure plate, two nuts and a pressing assembly. The two mounting plates are bolted to the valve and are located on both sides of the valve core. The two motors are fixedly connected to the corresponding mounting plates and are located above the corresponding mounting plates. The two threaded rods are fixedly connected to the output ends of the corresponding motors and are located above the corresponding motors. The pressure plate is threadedly connected to the two threaded rods and is located above the valve. The two nuts are threadedly connected to the corresponding threaded rods and are located above the pressure plate. The pressing assembly is arranged between the valve core and the pressure plate.

2. The high pressure safety valve disassembly tool as claimed in claim 1, characterized in that: The pressure assembly includes a pressure ring, a connecting ring and a spring. The connecting ring is rotatably connected to the pressure plate and is located below the pressure plate. One end of the spring is fixedly connected to the connecting ring, and the other end of the spring is fixedly connected to the pressure ring and covers the top of the valve stem. The pressure ring is arranged above the valve core.

3. The high pressure safety valve disassembly tool as claimed in claim 2, characterized in that: A clamping ring is arranged at the upper end of the connecting ring, one end of the clamping ring is fixedly connected to the connecting ring, and the other end of the clamping ring is clamped to the pressing plate, and the cross section of the clamping ring is arranged in an L shape.

4. The high pressure safety valve disassembly tool as claimed in claim 3, characterized in that: The high-pressure safety valve disassembly tool also includes a guide assembly, and the guide assembly is arranged between the pressure ring and the connecting ring.

5. The high pressure safety valve disassembly tool as claimed in claim 4, characterized in that: The guide assembly includes a first sleeve and a second sleeve, the first sleeve is slidably connected to the connecting ring and is located below the connecting ring, one end of the second sleeve is fixedly connected to the pressure ring, the other end of the second sleeve is slidably connected to the first sleeve and is located above the first sleeve, and the first sleeve and the second sleeve are both sleeved on the surface of the valve stem.

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