Sealing device for checking high-pressure safety valve of pressure vessel

Abstract

The utility model relates to the technical field of safety valve verification, in particular to a sealing device for verification of a high-pressure safety valve of a pressure vessel, which comprises a verification table, two symmetrical clamping assemblies are mounted on the verification table, a pneumatic tube is fixedly mounted on the verification table, a flange is slidably connected onto the pneumatic tube, and the flange is provided with a sealing ring. A plurality of limiting openings are formed in the flange, a plurality of notches are formed in the verification table, limiting blocks are slidably connected in the notches, the limiting blocks are slidably connected in the limiting openings, first threaded rods penetrate through the limiting blocks in a threaded mode, and the first threaded rods are rotatably connected in the notches; a first bevel gear is fixedly installed at one end of the first threaded rod, and a rotating rod is rotationally connected into the verification table. According to the utility model, the sealing flanges of the safety valves with different specifications can be quickly replaced and mounted, so that the safety valves with different specifications can be conveniently checked by workers, and the safety valves with different specifications can be stably clamped.

Description

Technical Field

[0001] This utility model relates to the field of safety valve calibration technology, and in particular to a sealing device for calibrating high-pressure safety valves of pressure vessels. Background Technology

[0002] A safety valve is an automatic valve device used to protect pressure systems from overpressure damage. Its core function is to automatically open and release the medium when the internal pressure of the system exceeds a preset safety threshold, thereby reducing the pressure to a safe range and preventing equipment from exploding or being damaged. Safety valves are an indispensable safety protection device in pressure systems.

[0003] Existing safety valve calibration devices require sealing the inlet of the safety valve with a flange during calibration to prevent leakage. However, existing calibration devices often cannot quickly replace and install flanges when sealing safety valves of different specifications, which affects the calibration work. In addition, the safety valve itself is not stably clamped after sealing, so it is necessary to stably clamp safety valves of different specifications before calibration. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a sealing device for calibrating high-pressure safety valves of pressure vessels.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A sealing device for calibrating a high-pressure safety valve of a pressure vessel includes a calibration platform. Two symmetrical clamping assemblies are mounted on the calibration platform. A pneumatic pipe is fixedly mounted on the calibration platform, and a flange is slidably connected to the pneumatic pipe. Multiple limiting ports are opened on the flange. Multiple slots are opened on the calibration platform, and limiting blocks are slidably connected within the slots. A first threaded rod is threaded through the limiting block and rotatably connected within the slot. A first bevel gear is fixedly mounted at one end of the first threaded rod. A rotating rod is rotatably connected within the calibration platform, and a second bevel gear is fixedly mounted at one end of the rotating rod. The second bevel gear meshes with the first bevel gear.

[0007] Preferably, the clamping assembly includes a fixed block fixedly connected to the calibration table, the fixed block having a lifting groove, a lifting block slidably connected in the lifting groove, a second threaded rod rotatably connected to the lifting block, a clamping block threadedly connected to the second threaded rod, a spur gear fixedly installed on one end of the second threaded rod, and a rack fixedly installed in the lifting groove, the rack meshing with the spur gear.

[0008] Preferably, the flange has multiple control ports, each of which has a spring fixedly installed inside. Each of the multiple springs has a stabilizing block fixedly installed at one end, and the multiple stabilizing blocks are slidably connected to the multiple control ports.

[0009] Preferably, a knob is fixedly installed on one end of each of the plurality of rotating rods, and anti-slip texture is installed on each of the plurality of knobs.

[0010] Preferably, a handle is fixedly installed on the side wall of both lifting blocks, and a rubber sleeve is fitted on the handle.

[0011] Preferably, the sidewalls of the plurality of stabilizing blocks that are close to each other are all installed in an inclined shape.

[0012] 1. Compared with the prior art, the beneficial effects of this utility model are: the rotation of the second bevel gear driven by the rotating rod drives the first bevel gear to rotate, thus driving the first threaded rod to rotate and causing the limiting block to enter the limiting port to complete the clamping of the flange. This structure can be adapted to safety valves of different specifications, and can quickly replace and stably operate flanges of different specifications, which is convenient for staff to perform verification.

[0013] 2. The lifting block drives the spur gear to rotate on the rack. Therefore, when the lifting block descends, it can drive the second threaded rod to rotate, thereby driving the clamping block to stably clamp the safety valve and can be adapted to safety valves of different specifications. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of a sealing device for calibrating a high-pressure safety valve of a pressure vessel, as proposed in this utility model.

[0015] Figure 2 This is a three-dimensional cross-sectional view of the limiting block of a sealing device for calibrating a high-pressure safety valve of a pressure vessel, as proposed in this utility model.

[0016] Figure 3 This is a three-dimensional structural diagram of the clamping block of a sealing device for calibrating a high-pressure safety valve of a pressure vessel, as proposed in this utility model.

[0017] In the diagram: 1. Calibration platform, 2. Air pressure pipe, 3. Flange, 4. Restriction port, 5. Restriction block, 6. First threaded rod, 7. First bevel gear, 8. Rotating rod, 9. Second bevel gear, 10. Fixing block, 11. Lifting groove, 12. Lifting block, 13. Second threaded rod, 14. Clamping block, 15. Spur gear, 16. Rack, 17. Spring, 18. Stabilizing block, 19. Knob, 20. Handle. Detailed Implementation

[0018] Reference Figures 1-3A sealing device for calibrating a high-pressure safety valve of a pressure vessel includes a calibration table 1. Two symmetrical clamping assemblies are installed on the calibration table 1. Each clamping assembly includes a fixed block 10 fixedly connected to the calibration table 1. The fixed block 10 has a lifting groove 11. A lifting block 12 is slidably connected in the lifting groove 11. A handle 20 is fixedly installed on the side wall of the two lifting blocks 12. A rubber sleeve is fitted on the handle 20. Through the handle 20, the operator can pull the lifting handle 20 to simultaneously raise and lower the two lifting blocks 12, ensuring the synchronicity of clamping and releasing the safety valve. A second threaded rod 13 is rotatably connected to the lifting block 12. A clamping block 14 is threadedly connected to the second threaded rod 13. A spur gear 15 is fixedly installed on one end of the second threaded rod 13.

[0019] A rack 16 is fixedly installed inside the lifting groove 11. The rack 16 meshes with a spur gear 15. Through the above structure, when the two lifting blocks 12 are lowered by the handle 20, the two spur gears 15 descend and rotate on the rack 16, thereby driving the two fixedly installed second threaded rods 13 to rotate. This causes the two clamping blocks 14 to move closer to each other and stably clamp the safety valve. Since the size of safety valves of different specifications is different, the smaller the specification of the safety valve, the smaller its clamping width and the lower its clamping height. Therefore, the structure meets the above requirements. At the same time, the rubber sleeve protects the staff from injury. A pneumatic pipe 2 is fixedly installed on the calibration table 1. A flange 3 is slidably connected to the pneumatic pipe 2. Multiple control ports are opened on the flange 3. Springs 17 are fixedly installed in each of the multiple control ports. A stabilizing block 18 is fixedly installed at one end of each of the multiple springs 17. The side walls of the multiple stabilizing blocks 18 that are close to each other are installed in an inclined shape. Through the inclined installation of the stabilizing blocks 18, the stabilizing blocks 18 can be squeezed more quickly when the safety valve is placed down.

[0020] Multiple stabilizing blocks 18 are slidably connected to multiple control ports. Through the above structure, when the safety valve is pressed down to allow the flange 3 to enter the inlet, the stabilizing blocks 18 are squeezed and moved outward until the safety valve reaches the bottom. At this time, the stabilizing blocks 18, under the elastic force of the spring 17, initially clamp and stabilize the safety valve. Multiple limiting ports 4 are opened on the flange 3, and multiple slots are opened on the calibration table 1. Limiting blocks 5 are slidably connected in the slots. The limiting blocks 5 are slidably connected in the limiting ports 4. A first threaded rod 6 is threaded through the limiting blocks 5. The first threaded rod 6 is rotatably connected in the slot. A first bevel gear 7 is fixedly installed at one end of the first threaded rod 6. A rotating rod 8 is rotatably connected in the calibration table 1.

[0021] A knob 19 is fixedly installed on one end of each of the multiple rotating rods 8. Each knob 19 has anti-slip texture. By rotating the knob 19, the rotating rod 8 can be easily rotated, which in turn drives the second bevel gear 9 to rotate, thus driving the meshing first bevel gear 7 to rotate, thereby enabling the flange 3 to be stably installed. The second bevel gear 9 is fixedly installed on one end of the rotating rod 8, and the second bevel gear 9 meshes with the first bevel gear 7.

[0022] In this invention, the working principle is as follows: Using the safety valve that needs to be calibrated, the operator takes out a suitable flange 3 as a sealing device. Then, the operator places the flange 3 on the outside of the air pressure pipe 2. At this time, rotating the knob 19 rotates the rotating rod 8, which in turn rotates the second bevel gear 9, which in turn rotates the meshing first bevel gear 7, thereby rotating the first threaded rod 6. This causes the limiting block 5 to slide into the limiting port 4. Repeating the above operation completes the fixing and installation of the flange 3. Then, the inlet of the safety valve is aligned with the flange 3 and inserted. During the pressing process, the safety valve... The valve presses against the stabilizing block 18, which moves outward until the safety valve descends to the bottom and completes the seal. Under the tension of the spring 17, the stabilizing block 18 initially stabilizes the safety valve. At this time, the operator pulls the handle 20 to move it downward, and the lifting block 12 moves downward. The spur gear 15 on it rotates and descends on the rack 16, thereby driving the second threaded rod 13 to rotate and drive the clamping block 14 threaded to it to approach and clamp and stabilize the safety valve. The operation is convenient, and the flange 3 can be quickly installed. It can also be replaced according to the current specification of the safety valve, and the safety valve can be quickly fixed.

Claims

1. A sealing device for calibrating a high-pressure safety valve of a pressure vessel, comprising a calibration bench (1), characterized in that, The calibration table (1) is equipped with two symmetrical clamping components. A pneumatic pipe (2) is fixedly installed on the calibration table (1). A flange (3) is slidably connected to the pneumatic pipe (2). Multiple limiting ports (4) are opened on the flange (3). Multiple slots are opened on the calibration table (1). A limiting block (5) is slidably connected in the slot. The limiting block (5) is slidably connected in the limiting port (4). A first threaded rod (6) is threaded through the limiting block (5). The first threaded rod (6) is rotatably connected in the slot. A first bevel gear (7) is fixedly installed at one end of the first threaded rod (6). A rotating rod (8) is rotatably connected in the calibration table (1). A second bevel gear (9) is fixedly installed at one end of the rotating rod (8). The second bevel gear (9) meshes with the first bevel gear (7).

2. The sealing device for calibrating a high-pressure safety valve of a pressure vessel according to claim 1, characterized in that, The clamping assembly includes a fixed block (10) fixedly connected to the calibration table (1), a lifting groove (11) is opened on the fixed block (10), a lifting block (12) is slidably connected in the lifting groove (11), a second threaded rod (13) is rotatably connected to the lifting block (12), a clamping block (14) is threadedly connected to the second threaded rod (13), a spur gear (15) is fixedly installed on one end of the second threaded rod (13), a rack (16) is fixedly installed in the lifting groove (11), and the rack (16) meshes with the spur gear (15).

3. The sealing device for calibrating a high-pressure safety valve of a pressure vessel according to claim 1, characterized in that, The flange (3) has multiple control ports, each of which is fixedly installed with a spring (17). Each of the multiple springs (17) has a stabilizing block (18) fixedly installed at one end. The multiple stabilizing blocks (18) are slidably connected to the multiple control ports respectively.

4. A sealing device for calibrating a high-pressure safety valve of a pressure vessel according to claim 1, characterized in that, A knob (19) is fixedly installed on one end of each of the multiple rotating rods (8), and anti-slip texture is installed on each of the multiple knobs (19).

5. A sealing device for calibrating a high-pressure safety valve of a pressure vessel according to claim 2, characterized in that, A handle (20) is fixedly installed on the side wall of both lifting blocks (12), and a rubber sleeve is fitted on the handle (20).

6. A sealing device for calibrating a high-pressure safety valve of a pressure vessel according to claim 3, characterized in that, The sidewalls of the multiple stabilizing blocks (18) that are close to each other are all installed in a sloping shape.

Images