Verification tool for safety valve

Abstract

The utility model discloses a verification tool for a safety valve, and relates to the technical field of safety valves, the verification tool comprises a verification device body which is suitable for verification of the safety valve, the verification device body comprises a verification box, the top of the verification box is provided with a fixing table, the periphery of the bottom end of the verification box is fixedly provided with supporting legs, and the supporting legs are fixedly connected with the fixing table. The top of the verification box is provided with a gas transmission unit. A shifting plate drives a moving ring to move downwards to slide on the outer surface of a fixed vertical rod, at the moment, the moving ring moves downwards to extrude a reset spring, the moving ring moves downwards to drive a positioning ring to promote a pulling ring to move downwards along with the moving ring, and the pulling ring drives an L-shaped abutting plate to rotate inside a rotating shaft and gradually rotate towards the outer side; at the moment, the verified safety valve is placed in the fixing table and located at the top of the verification box, the L-shaped abutting plate can be made to rebound and reset by releasing the shifting plate, the L-shaped abutting plate is attached to and extruded on the outer surface of the safety valve, the valve body is clamped and positioned, and verification stability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of safety valves, in particular to a calibration tool for safety valves. Background Art

[0002] A safety valve is a safety protection valve. Its opening and closing parts are in a normally closed state under the action of external forces. When the medium pressure in the equipment or pipeline increases and exceeds the specified value, it automatically opens and discharges the medium outside the system to prevent the medium pressure in the pipeline or equipment from exceeding the specified value. It is a safety device to prevent overpressure in pressure vessels.

[0003] The set pressure of the safety valve is an important parameter that determines whether the safety valve can be opened in time when the equipment is under too high pressure. Therefore, it is particularly important to calibrate the safety valve before use. When calibrating existing safety valves, the placement of the safety valve is unstable, resulting in inaccurate inspection and affecting work efficiency. Utility Model Content

[0004] The utility model aims to provide a calibration tool for a safety valve to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0006] A calibration tool for a safety valve comprises a calibration device body, which is suitable for use in the calibration of the safety valve. The calibration device body comprises a calibration box, a fixed platform is arranged on the top of the calibration box, and support legs are fixedly installed around the bottom end of the calibration box.

[0007] The top of the test box is provided with a gas delivery unit, and the four sides of the fixing platform are provided with fixing units.

[0008] A further improvement of the technical solution of the utility model is that the fixed unit includes a fixed vertical rod fixedly installed on the bottom end of the fixed platform, the other end of the fixed vertical rod is fixedly installed on the top of the inspection box, and a return spring is movably sleeved on the outer surface of the bottom end of the fixed vertical rod. The fixed vertical rod can limit the position of the movable ring when it moves up and down.

[0009] A further improvement of the technical solution of the utility model is that: the outer surface of the fixed vertical rod is located above the reset spring and is slidably sleeved with a moving ring, a toggle plate is fixedly installed on the front outer surface of the moving ring, and positioning rings are welded on all four sides of the outer surface of the moving ring. The elastic potential energy of the reset spring can cause the L-shaped resistance plate to fit tightly against the outer surface of the valve body.

[0010] A further improvement of the technical solution of the utility model is that: a pulling ring is movably sleeved inside the positioning ring, an L-shaped resistance plate is movably sleeved on the top of the pulling ring, a rotating shaft is rotatably installed on the inner side of the bottom end of the L-shaped resistance plate, and the rotating shaft is fixedly installed on the top of the fixed platform to facilitate the rotation of the L-shaped resistance plate.

[0011] A further improvement of the technical solution of the utility model is that the gas delivery unit includes a gas delivery pipeline fixedly installed on the bottom input end of the calibration box, and a conical connecting port is fixedly installed on the top output end of the calibration box, and the conical connecting port can be engaged with valve body connecting ports of different diameters.

[0012] A further improvement of the technical solution of the utility model is that an air guide port is fixedly installed on the top of the conical connecting port, and a clamping groove is opened on the top of the air guide port.

[0013] A further improvement of the technical solution of the utility model is that a filter screen is arranged above the air guide port, a snap ring is fixedly installed on the bottom frame of the filter screen, the snap ring is detachably plugged into the inside of the snap groove, and the filter screen can filter the input gas.

[0014] Due to the adoption of the above technical solution, the utility model has achieved the following technical progress compared with the prior art:

[0015] 1. The utility model provides a calibration fixture for a safety valve, wherein a moving ring is driven to move downward and slide on the outer surface of a fixed vertical rod by a toggle plate. At this time, the downward movement of the moving ring squeezes a reset spring, and the downward movement of the moving ring simultaneously drives a positioning ring to prompt a pulling ring to follow the downward movement. The pulling ring drives an L-shaped resistance plate to rotate inside a rotating shaft and gradually rotates outward. At this time, the calibrated safety valve is placed inside a fixed platform and on the top of a calibration box. Releasing the toggle plate can prompt the L-shaped resistance plate to rebound and reset, fit and squeeze on the outer surface of the safety valve, clamp the valve body, and improve the calibration stability.

[0016] 2. The utility model provides a calibration tool for a safety valve, which can correspond to the safety valve connection ports of different diameters through the conical connection port. A filter screen is arranged on the top of the air guide port to filter the gas entering the safety valve to prevent impurities mixed in the gas from damaging the valve body, thereby extending the service life of the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the check box of the utility model;

[0019] Figure 3This is a schematic diagram of the fixed platform structure of the utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the conical connection port of the utility model;

[0021] Figure 5 For the utility model Figure 4 A is an enlarged schematic diagram of the structure.

[0022] In the figure: 1. calibration device body; 2. calibration box; 21. gas pipeline; 22. conical connection port; 23. gas guide port; 24. snap-fit ​​groove; 25. filter screen; 26. snap-fit ​​ring; 3. fixed platform; 31. fixed vertical rod; 32. reset spring; 33. moving ring; 34. toggle plate; 35. positioning ring; 36. pulling ring; 37. L-shaped resistance plate; 38. rotating shaft; 4. supporting leg. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Example 1

[0025] like Figure 1-5 As shown, the utility model provides a calibration tool for a safety valve, including a calibration device body 1, which is suitable for use in the calibration of a safety valve. The calibration device body 1 includes a calibration box 2, a fixed platform 3 is provided on the top of the calibration box 2, and support legs 4 are fixedly installed around the bottom end of the calibration box 2. A gas transmission unit is provided on the top of the calibration box 2, and a fixing unit is provided around the fixing platform 3. The gas transmission unit includes a gas transmission pipeline 21 fixedly installed on the input end of the bottom end of the calibration box 2, a conical connecting port 22 is fixedly installed on the top output end of the calibration box 2, and an air guide port 23 is fixedly installed on the top of the conical connecting port 22. A clamping groove 24 is opened on the top of the air guide port 23, and a filter screen plate 25 is provided above the air guide port 23. A clamping ring 26 is fixedly installed on the bottom end frame of the filter screen plate 25, and the clamping ring 26 is detachably plugged into the inside of the clamping groove 24.

[0026] Furthermore, the gas is delivered to the interior of the calibration box 2 through an external air pump in cooperation with the gas pipeline 21, and then introduced into the interior of the safety valve for continuous inflation to calibrate the safety valve. The gas can be filtered while being continuously delivered in cooperation with the filter screen 25 to prevent impurities in the gas from entering the safety valve and causing damage to the valve body.

[0027] Example 2

[0028] like Figure 1-5 As shown, on the basis of Example 1, the utility model provides a technical solution: preferably, the fixed unit includes a fixed vertical rod 31 fixedly mounted on the bottom end of the fixed platform 3, the other end of the fixed vertical rod 31 is fixedly mounted on the top of the inspection box 2, a reset spring 32 is movably sleeved on the outer surface of the bottom end of the fixed vertical rod 31, a moving ring 33 is slidably sleeved on the outer surface of the fixed vertical rod 31 above the reset spring 32, a toggle plate 34 is fixedly mounted on the front outer surface of the moving ring 33, a positioning ring 35 is welded on the outer surface of the moving ring 33, a pulling ring 36 is movably sleeved inside the positioning ring 35, an L-shaped resistance plate 37 is movably sleeved on the top of the pulling ring 36, a rotating shaft 38 is rotatably mounted on the inner side of the bottom end of the L-shaped resistance plate 37, and the rotating shaft 38 is fixedly mounted on the top of the fixed platform 3.

[0029] Furthermore, by pressing the toggle plate 34 downward, the toggle plate 34 is used to drive the moving ring 33 to move downward and slide on the outer surface of the fixed vertical rod 31. At this time, the downward movement of the moving ring 33 squeezes the reset spring 32. The moving ring 33 moves downward and simultaneously drives the positioning ring 35 to prompt the pulling ring 36 to move downward. The pulling ring 36 drives the L-shaped contact plate 37 to rotate inside the rotating shaft 38 and gradually rotate outward. At this time, the calibrated safety valve is placed inside the fixed table 3 on the top of the calibration box 2. Releasing the toggle plate 34 can prompt the L-shaped contact plate 37 to rebound and reset, and fit and squeeze on the outer surface of the safety valve.

[0030] The following is a detailed description of the working principle of the calibration tooling for safety valves.

[0031] like Figure 1-5As shown, when in use, by pressing the toggle plate 34 downward, the toggle plate 34 drives the moving ring 33 to move downward and slide on the outer surface of the fixed vertical rod 31. At this time, the moving ring 33 moves downward to squeeze the reset spring 32. The moving ring 33 moves downward and drives the positioning ring 35 to prompt the pulling ring 36 to move downward. The pulling ring 36 drives the L-shaped contact plate 37 to rotate inside the rotating shaft 38 and gradually rotate outward. At this time, the calibrated safety valve is placed inside the fixed platform 3 at the top of the calibration box 2 and plugged into the outer surface of the tapered connecting port 22. The tapered connecting port 22 can be used to correspondingly engage with safety valve connecting ports of different diameters. After installation, release the toggle plate 34. At this time, the moving ring 33 rebounds and resets under the elastic reverse thrust of the reset spring 32. The moving ring 33 drives the positioning ring 35 to prompt the pulling ring 36 to push the L-shaped contact plate 37 to rotate inward, and then fits and squeezes on the outer surface of the safety valve to fix it. The gas is transported to the inside of the verification box 2 through an external air pump in conjunction with the gas pipeline 21, and then introduced into the inside of the safety valve for continuous inflation to verify the safety valve. When the gas is continuously transported, it can be filtered by the filter screen 25 to prevent impurities in the gas from entering the safety valve and causing damage to the valve body.

[0032] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not deviate from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A calibration tool for a safety valve, comprising a calibration device body (1), suitable for use in calibrating a safety valve, characterized in that: The calibration device body (1) comprises a calibration box (2), a fixing platform (3) is arranged on the top of the calibration box (2), and supporting legs (4) are fixedly installed around the bottom end of the calibration box (2); The top of the test box (2) is provided with a gas transmission unit, and the four sides of the fixing platform (3) are provided with fixing units; The gas delivery unit comprises a gas delivery pipeline (21) fixedly mounted on the bottom input end of the calibration box (2), and a conical connection port (22) fixedly mounted on the top output end of the calibration box (2); An air guide port (23) is fixedly mounted on the top of the conical connecting port (22), and a locking groove (24) is provided on the top of the air guide port (23); A filter screen plate (25) is arranged above the air guide port (23), and a clamping ring (26) is fixedly mounted on the bottom frame of the filter screen plate (25), and the clamping ring (26) is detachably plugged into the inside of the clamping groove (24).

2. A check fixture for a safety valve according to claim 1, characterized in that: The fixing unit comprises a fixing vertical rod (31) fixedly mounted on the periphery of the bottom end of the fixing platform (3), the other end of the fixing vertical rod (31) being fixedly mounted on the periphery of the top of the inspection box (2), and a return spring (32) being movably sleeved on the outer surface of the bottom end of the fixing vertical rod (31).

3. A check fixture for a safety valve according to claim 2, characterized in that: The outer surface of the fixed vertical rod (31) is located above the reset spring (32) and is slidably sleeved with a moving ring (33), a toggle plate (34) is fixedly installed on the front outer surface of the moving ring (33), and positioning rings (35) are welded around the outer surface of the moving ring (33).

4. A check fixture for a safety valve according to claim 3, characterized in that: A pulling ring (36) is movably sleeved inside the positioning ring (35), an L-shaped contact plate (37) is movably sleeved on the top of the pulling ring (36), a rotating shaft (38) is rotatably mounted on the inner side of the bottom end of the L-shaped contact plate (37), and the rotating shaft (38) is fixedly mounted on the top and around the fixed platform (3).

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