Split type pilot safety valve on-line verification device

Abstract

The utility model discloses a split type pilot safety valve on-line verification device, which relates to the technical field of safety valve on-line verification, and comprises a valve cover and a valve core arranged at the upper end inside the valve cover, the top of the valve core is provided with a connecting groove and is provided with a plug in a penetrating manner, and the side part of the plug is provided with a rotary sealing groove. Two sealing plates which are symmetrically arranged are arranged in the rotary sealing groove in a covering mode, a bottom plate is fixedly arranged at the upper end of the outer wall of the plug, two vertical rods which are symmetrically arranged are rotatably arranged in the bottom plate in a penetrating mode, the sealing plates are rotatably connected with the vertical rods in a sleeving mode, and the rod walls of the two vertical rods are jointly provided with an opening and closing checking mechanism used for driving the sealing plates to rotate. According to the utility model, the plug and the valve body can be integrally arranged, and meanwhile, when a checking table needs to be connected, the hole in the plug can be opened, so that the plug can be conveniently matched with a pipe fitting, the loss of a valve body assembly is avoided as much as possible, and the use stability of the checked valve body is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of online calibration of safety valves, in particular to an online calibration device for a split-type pilot safety valve. Background Art

[0002] Split-type pilot safety valves play a key safety protection role in many industrial systems. If the safety valve fails, when the system pressure exceeds the design limit, it may lead to catastrophic consequences such as pipeline rupture and container explosion. Therefore, online calibration is required to promptly detect potential safety valve failure hazards.

[0003] After searching, the patent document with announcement number CN218512018U discloses a split-type pilot safety valve online calibration device. When the safety valve is operating normally, the calibration device needs to first operate the three-way valve core 2 (rotate the hexagonal head part by a wrench, counterclockwise from top to bottom) to place it in the upper limit position. At this time, the pulse pipeline flow channel is connected to the pilot control cabinet flow channel; when the safety valve is calibrated online, the three-way valve core 2 needs to be operated first (rotate the hexagonal head part by a wrench, clockwise from top to bottom) to place it in the lower limit position, that is, after isolating the pulse pipeline flow channel from the pilot control cabinet flow, remove the plug 8, and then install the pressure test bench pipeline connector 10 in the position of the original plug 8. At this time, the pressure test bench is connected to the pilot control cabinet flow channel through the three-way valve core 2 flow channel, so that online set pressure calibration can be achieved.

[0004] However, during the calibration process of the above-mentioned safety valve, the plug on the top of the valve body needs to be removed and then connected to the pipe fittings of the calibration platform. Direct separation of the plug from the valve body can easily cause the plug to be lost, resulting in incomplete valve body components after the calibration, which affects the stability of the valve body. Utility Model Content

[0005] In view of the problems existing in the above-mentioned existing split-type pilot safety valve online calibration device, the present utility model is proposed.

[0006] Therefore, the purpose of the present invention is to provide a split-type pilot safety valve online calibration device, which solves the problem that the internal plug of the safety valve needs to be removed before the safety valve is connected to the calibration platform, which easily causes the plug to be lost and affects the stability of subsequent use of the safety valve.

[0007] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0008] A split-type pilot safety valve online calibration device comprises a valve cover and a valve core arranged at the upper end of the valve cover. The top of the valve core is provided with a connecting groove and is penetrated by a plug. The plug is provided with a through hole inside. The side of the plug is provided with a rotating sealing groove. The inner cover of the rotating sealing groove is provided with two symmetrically arranged sealing plates.

[0009] A bottom plate is fixed to the upper end of the outer wall of the plug, and two symmetrically arranged vertical rods are rotatably penetrated inside the bottom plate. The sealing plate is rotatably sleeved with the vertical rods, and the rod walls of the two vertical rods are jointly provided with an opening and closing verification mechanism for driving the sealing plate to rotate.

[0010] Preferably, the opening and closing verification mechanism includes a bidirectional worm, the upper ends of the rod walls of the two vertical rods are fixed with worm wheels, the top of the base plate is fixed with a vertical plate, the bidirectional worm is rotatably arranged in the vertical plate, and is cooperated with the two worm wheels, and the end of the bidirectional worm is fixed with a rotating block.

[0011] Preferably, a support tube is fixedly provided at the outer upper end of the vertical plate, a positioning rod is slidably provided inside the support tube, a plurality of positioning grooves symmetrically arranged in a surrounding manner are opened on the outer wall of the rotating block, the end of the positioning rod is inserted into the positioning groove, and a spring is provided on the rod wall of the positioning rod, and the two ends of the spring are respectively fixedly connected to the support tube and the positioning rod.

[0012] Preferably, a pull plate is fixedly provided on the rod wall of the positioning rod.

[0013] Furthermore, a sealing gasket is provided at the bottom of each of the two sealing plates, and the sealing gasket contacts and cooperates with the bottom of the rotating sealing groove.

[0014] Preferably, the support tube is an L-shaped support tube.

[0015] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0016] 1. The utility model can integrate the plug with the valve body through the valve core, plug, rotating sealing groove, bottom plate, vertical rod, sealing plate and opening and closing calibration mechanism. At the same time, when it is necessary to connect to the calibration table, the internal opening of the plug can be opened to facilitate the cooperation with the pipe fitting, thereby avoiding the loss of the valve body assembly as much as possible and ensuring the stability of the valve body after calibration.

[0017] 2. The utility model can determine the position of the bidirectional worm gear through the vertical rod, sealing plate, opening and closing verification mechanism, rotating block, support tube, positioning rod and spring, ensuring that the sealing plate can stably seal and open the plug for use, thereby improving the stability of the safety valve before and after verification. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is a structural diagram of the utility model;

[0020] Figure 2 This is a top cross-sectional view of the plug of the utility model;

[0021] Figure 3 For the utility model Figure 1 A magnified schematic diagram of part A;

[0022] Figure 4 For the utility model Figure 3 An enlarged schematic diagram of part B;

[0023] Figure 5 It is a schematic diagram of the three-dimensional structure of the support tube of the present utility model.

[0024] Description of reference numerals:

[0025] 1. Valve cover; 2. Valve core; 3. Plug; 4. Rotating sealing groove; 5. Sealing plate; 6. Bottom plate; 7. Vertical rod; 8. Bidirectional worm; 9. Worm gear; 10. Vertical plate; 11. Rotating block; 12. Support tube; 13. Positioning rod; 14. Spring; 15. Pull plate; 16. Sealing gasket. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0027] The embodiment of the utility model discloses a split-type pilot safety valve online calibration device.

[0028] Example 1

[0029] The utility model provides Figure 1-5 The illustrated device for online calibration of a split-type pilot safety valve includes a valve cover 1 and a valve core 2 disposed at the upper end of the valve cover 1. A connecting groove is formed on the top of the valve core 2 and is penetrated by a plug 3. A through hole is formed inside the plug 3. A rotating sealing groove 4 is formed on the side of the plug 3. The inner cover of the rotating sealing groove 4 is provided with two symmetrically arranged sealing plates 5. The bottom of each sealing plate 5 is provided with a sealing gasket 16, which contacts and cooperates with the bottom of the rotating sealing groove 4.

[0030] A bottom plate 6 is fixedly provided at the upper end of the outer wall of the plug 3 , and two symmetrically arranged vertical rods 7 are rotatably penetrated inside the bottom plate 6 , and the sealing plate 5 is rotatably sleeved with the vertical rods 7 .

[0031] When the valve body is in normal use, the two sealing plates 5 contact each other and seal the inside of the rotating sealing groove 4. At the same time, the setting of the sealing gasket 16 can ensure good connection sealing. When the valve body needs to be calibrated, the two sealing plates 5 can be rotated in opposite directions under the support of the vertical rod 7, and the through hole inside the plug 3 can be opened, and the position of the sealing plate 5 can be determined. At this time, the through hole at the top of the plug is opened, which can be connected with the internal pipe fittings of the calibration table, and the inside of the valve body can be inspected to avoid the plug 3 from separating from the valve body and being lost, so as to ensure the stability of the subsequent valve body. After the calibration, the two sealing plates 5 can be rotated to their original position and the through hole can be sealed.

[0032] Example 2

[0033] In Example 2, based on Example 1, the through hole is opened in order to simultaneously drive the two sealing plates 5 to rotate. Figure 1-3 As shown, the rod walls of the two vertical rods 7 are jointly provided with an opening and closing verification mechanism for driving the sealing plate 5 to rotate. The opening and closing verification mechanism includes a bidirectional worm 8. The upper ends of the rod walls of the two vertical rods 7 are fixedly sleeved with worm wheels 9, and the top of the bottom plate 6 is fixedly provided with a vertical plate 10. The bidirectional worm 8 is rotatably arranged in the vertical plate 10 and is cooperated with the two worm wheels 9. The end of the bidirectional worm 8 is fixedly provided with a rotating block 11.

[0034] Before calibration, the rotating block 11 can be pushed so that the rotating block 11 drives the bidirectional worm 8 to rotate. At this time, through the cooperation of the bidirectional worm 8 and the two worm wheels 9, the two worm wheels 9 can rotate in opposite directions at the same time, and drive the sealing plate 5 to rotate with the help of the vertical rod 7, so that the inside of the plug 3 can be opened for stable calibration work.

[0035] Example 3

[0036] Example 3 is based on Example 1-2 to ensure that the position of the sealing plate 5 is fixed before and after opening and closing. Figure 4-5 As shown, a support tube 12 is fixedly provided at the outer upper end of the vertical plate 10. The support tube 12 is an L-shaped support tube. A positioning rod 13 is slidably passed through the interior of the support tube 12. The outer wall of the rotating block 11 is provided with a plurality of positioning grooves that are symmetrically arranged around. The ends of the positioning rods 13 are inserted into the positioning grooves. A spring 14 is provided on the rod wall of the positioning rod 13. The two ends of the spring 14 are fixedly connected to the support tube 12 and the positioning rod 13 respectively. A pull plate 15 is fixed on the rod wall of the positioning rod 13.

[0037] When it is necessary to rotate the sealing plate 5 to open the plug 3, the positioning rod 13 can be pulled horizontally by pulling the plate 15, so that the positioning rod 13 squeezes the spring 14 and enters the support tube 12. At this time, the positioning rod 13 is separated from the positioning groove, and then the rotating block 11 can be rotated to control the rotation of the sealing plate 5. After the rotation position of the sealing plate 5 is determined, the pulling plate 15 is released, and the positioning rod 13 quickly rebounds under the elastic force of the spring 14 and continues to be inserted into the rotating block 11, thereby completing the fixing of the matching position of the bidirectional worm 8 and the worm wheel 9, and determining the position of the sealing plate 5 to ensure the stability of use before and after the valve body is checked.

[0038] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A split-type pilot safety valve online calibration device, comprising a valve cover (1) and a valve core (2) arranged at the upper end of the valve cover (1), characterized in that: The top of the valve core (2) is provided with a connecting groove and is penetrated by a plug (3), the interior of the plug (3) is provided with a through hole, the side of the plug (3) is provided with a rotating sealing groove (4), and the inner cover of the rotating sealing groove (4) is provided with two symmetrically arranged sealing plates (5); A bottom plate (6) is fixedly provided at the upper end of the outer wall of the plug (3), two symmetrically arranged vertical rods (7) are rotatably penetrated inside the bottom plate (6), the sealing plate (5) and the vertical rods (7) are rotatably sleeved, and the rod walls of the two vertical rods (7) are jointly provided with an opening and closing calibration mechanism for driving the sealing plate (5) to rotate.

2. The split-type pilot safety valve online calibration device according to claim 1 is characterized in that: The opening and closing verification mechanism includes a bidirectional worm (8), the upper ends of the rod walls of the two vertical rods (7) are fixedly sleeved with worm wheels (9), the top of the bottom plate (6) is fixedly provided with a vertical plate (10), the bidirectional worm (8) is rotatably arranged in the vertical plate (10) and is arranged in conjunction with the two worm wheels (9), and the end of the bidirectional worm (8) is fixedly provided with a rotating block (11).

3. The online calibration device for a split-type pilot safety valve according to claim 2 is characterized in that: A support tube (12) is fixedly provided at the upper end of the outer edge of the vertical plate (10), a positioning rod (13) is slidably penetrated inside the support tube (12), a plurality of positioning grooves symmetrically arranged around the outer wall of the rotating block (11) are opened, the ends of the positioning rods (13) are inserted into the positioning grooves, a spring (14) is sleeved on the rod wall of the positioning rod (13), and the two ends of the spring (14) are fixedly connected to the support tube (12) and the positioning rod (13) respectively.

4. The online calibration device for a split-type pilot safety valve according to claim 3 is characterized in that: A pull plate (15) is fixedly provided on the rod wall of the positioning rod (13).

5. The online calibration device for a split-type pilot safety valve according to claim 1 is characterized in that: The bottoms of the two sealing plates (5) are each provided with a sealing gasket (16), and the sealing gasket (16) is in contact with and fits the bottom of the rotating sealing groove (4).

6. The online calibration device for a split-type pilot safety valve according to claim 3 is characterized in that: The support tube (12) is an L-shaped support tube.

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