A safety valve online detection device

Abstract

The present invention discloses an online detection device for a safety valve, which belongs to the technical field of safety valve verification and detection. It comprises a valve body installation device, and the valve body installation device comprises a mounting plate and a fixing device, wherein the mounting plate is used to support the safety valve, and the fixing device is used to fix the safety valve to the mounting plate. A vertical pipe is connected through the bottom of the mounting plate, and a pressure detection device is provided on the vertical pipe. The vertical pipe is connected through a main gas pipe, and the air inlet end of the main gas pipe is connected to a high-pressure gas providing device. The fixing device for fixing the safety valve of the present invention is controlled by the high-pressure gas used to verify the safety valve. After the high-pressure gas is ventilated, the fixing device will fix the safety valve, which can ensure that the safety valve is definitely in a fixed state before detection, thereby eliminating safety hazards.

Description

Technical Field

[0001] The invention belongs to the technical field of safety valve verification and detection, and specifically relates to an online detection device for a safety valve. Background Art

[0002] The opening pressure of the safety valve needs to be tested before it leaves the factory and after it has been used for a period of time to ensure its working reliability.

[0003] The patent with the authorization announcement number CN221198935U discloses a safety valve calibration device, including a test bench body, a fixture plate is arranged on the top of the test bench body, a fixed claw is symmetrically arranged on the top of the fixture plate, a screw is inserted and connected on the top of the fixed claw, a fixing nut is sleeved on the outside of the screw and located at the top of the fixed claw, and a buffer component is arranged at the bottom of the screw and located at the bottom of the fixed claw; the utility model is provided with a buffer component at the bottom of the fixed claw, and the operator adjusts the initial length of the compression spring in the compression sleeve by rotating the fixing nut. When the fixed claw works, the side top of the safety valve is clamped and fixed by the rubber sleeve, and the moving block moves into the moving groove, driving the moving rod to squeeze the compression spring through the push block, and the deformation and compression of the rubber sleeve and the compression spring realize the flexible clamping of the safety valve. The patent requires manual operation when fixing the safety valve. In the process of long-term repeated operation, the operator is prone to negligence and forgets to operate the fixed claw. When the safety valve is not fixed, high-pressure gas is introduced to calibrate the safety valve, which poses a great safety hazard. Summary of the invention

[0004] The technical problem to be solved by the present invention is: to overcome the shortcomings of the prior art and provide an online detection device for a safety valve. The fixer for fixing the safety valve of the present invention is controlled by high-pressure gas used to calibrate the safety valve. After the high-pressure gas is ventilated, the fixer will fix the safety valve, which can ensure that the safety valve is definitely in a fixed state before detection, thereby eliminating safety hazards.

[0005] The technical solution adopted by the present invention to solve the problems existing in the prior art is:

[0006] An online detection device for a safety valve comprises a valve body installation device, wherein the valve body installation device comprises a mounting plate and a fixer, wherein the mounting plate is used for supporting the safety valve, and the fixer is used for fixing the safety valve to the mounting plate.

[0007] The bottom of the installation plate is connected with a vertical pipe, a pressure detection device is arranged on the vertical pipe, the vertical pipe is connected with a main gas pipe, and the air inlet end of the main gas pipe is connected with a high-pressure gas providing device.

[0008] Preferably, a second stop valve is connected in series on the main gas pipe, and a position detection device is provided on the fixture, the position detection device is used to detect whether the fixture fixes the safety valve, and when the fixture fixes the safety valve, the second stop valve opens.

[0009] Preferably, an open-ended vent pipe is connected in series to the vertical pipe, and a first stop valve is connected in series to the vent pipe. After the position detection device detects that the fixer contacts the safety valve, the second stop valve is closed and the first stop valve is opened.

[0010] Preferably, the fixer comprises an arc-shaped rod, both ends of which are connected to downwardly arranged pressure blocks via connecting rods, and two symmetrically arranged rotating shafts are provided on the outer side of the arc-shaped rod, which are rotatably connected to the vertical tube.

[0011] The arc-shaped rod is sleeved with a sleeve, and the sleeve is connected to a cylinder. The cylinder controls the sleeve to move up and down, thereby driving the pressure block to rotate around the axis of the rotating shaft to achieve the compression and unlocking of the safety valve.

[0012] Preferably, the control air of the cylinder is supplied by a main air pipe.

[0013] Preferably, the cylinder comprises a vertically arranged piston chamber, the bottom of the piston chamber is connected to the main air pipe through a joint control air pipe, and the joint between the joint control air pipe and the main air pipe is located at the air inlet end of the second stop valve.

[0014] A piston is arranged inside the piston cavity, a telescopic rod is fixed on the piston, the top of the telescopic rod is fixedly connected to the sleeve, a first spring is sleeved on the telescopic rod inside the piston cavity, and the piston cavity is fixedly connected to the vertical tube.

[0015] Preferably, the position detection device is connected to the piston chamber.

[0016] Preferably, the position detection device adopts a through-beam photoelectric sensor or a touch switch.

[0017] Preferably, the main air pipe and the vertical pipe are connected via a flow guide pipe with a variable diameter.

[0018] Preferably, a mounting groove is recessed in the middle of the mounting plate, a through hole is provided at the center of the mounting groove, the through hole is connected to the vertical pipe, the mounting flange at the bottom of the safety valve is clamped in the mounting groove, and the pressure block is pressed above the mounting flange.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] (1) The fixer is linked to the second stop valve that controls whether high-pressure gas is passed into the safety valve. Only when the fixer fixes the safety valve will the second stop valve be opened, eliminating safety hazards and ensuring that the safety valve calibration work is safer.

[0021] (2) The opening pressure of the safety valve is determined by the pressure curve output by the pressure detection device, and the detection effect is more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0023] Figure 1 This is a structural diagram of an online detection device for a safety valve according to the present invention.

[0024] Figure 2 This is a front view of an online detection device for a safety valve according to the present invention.

[0025] Figure 3 This is a structural diagram of a valve body installation device in an online detection device for a safety valve of the present invention.

[0026] Figure 4 for Figure 3 Structural diagram after the pressure plate is opened.

[0027] Figure 5 for Figure 3 An exploded diagram of

[0028] Figure 6 This is a cross-sectional view of a fixture in the valve body fixing device of the present invention.

[0029] Figure 7 for Figure 6 A partial enlarged view of the middle A.

[0030] Figure 8 for Figure 6 A partial enlarged view of point B in the middle.

[0031] Fig. 9 This is a cross-sectional view of a support platform and a buffer box in an online detection device for a safety valve of the present invention.

[0032] Fig.10 for Fig. 9 A partial enlarged view of point C in the middle.

[0033] Fig.11 This is a structural diagram of a buffer box in an online detection device for a safety valve of the present invention.

[0034] Fig.12 This is the opening pressure detection curve diagram of the present invention.

[0035] In the figure: 1-vertical pipe, 101-rotating shaft bracket, 102-venting pipe, 103-first stop valve, 2-installation plate, 201-sealing groove, 202-positioning groove, 203-sealing ring, 3-reducing ring, 301-block, 4-pressing block, 5-connecting rod, 6-adjusting rod, 7-arc rod, 8-rotating shaft, 9-sleeve, 10-telescopic rod, 1001-piston, 11-guide sleeve, 12-fixed frame, 13-piston chamber, 1301-joint control air pipe, 14-first spring, 15-position detection device, 16-pressure detection device, 17-high-pressure gas providing device, 18-main gas pipe, 19-second stop valve, 20-guide pipe, 21-support platform, 22-base cabinet, 2201-waist-shaped hole, 23-limiting frame, 2301-front baffle, 24-buffer box, 2401-guide plate, 2402-through hole, 25-second spring, 26-safety valve, 2601-mounting flange, 2602-exhaust port. DETAILED DESCRIPTION

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the technical field of the present application. The terms used herein are only for the purpose of describing specific implementation methods and are not intended to limit the present application embodiments.

[0037] In addition, in the specification and claims of the present invention, terms indicating directions, such as "front", "rear", "up", "down", "left", "right", "side", "top", "bottom", etc., are used to describe various exemplary structural parts and elements of the present invention, but these terms are used here only for the purpose of convenience of description and are determined based on the exemplary orientations shown in the drawings. Therefore, these terms indicating directions are only for illustration and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0038] The following is a further detailed description of an online detection device for a safety valve of the present invention in conjunction with the accompanying drawings.

[0039] A safety valve online detection device, comprising Figures 1 to 12 As shown, it includes a valve body installation device arranged on a support platform 21, and the valve body installation device includes a mounting plate 2 and a fixture. The mounting plate 2 is used to support the safety valve 26, and the fixture is used to fix the safety valve 26 to the mounting plate 2.

[0040] A vertical pipe 1 is connected through the bottom of the installation plate 2 , and a pressure detection device 16 is provided on the vertical pipe 1 .

[0041] The mounting plate 2 has a mounting groove in the middle, a through hole in the center of the mounting groove, and the through hole is connected to the vertical pipe 1, and the mounting flange 2601 at the bottom of the safety valve 26 is clamped inside the mounting groove. The fixing device acts on the mounting flange 2601, and fixes the mounting flange 2601 to the mounting plate 2 by pressing down.

[0042] In order to be suitable for mounting flanges 2601 with different outer diameters, in this embodiment, a coaxially arranged reducing ring 3 is sleeved inside the mounting groove, the inner diameter of the reducing ring 3 is the same as the outer diameter of the mounting flange 2601, and the reducing ring 3 is sleeved outside the mounting flange 2601.

[0043] The reducer ring 3 and the mounting groove can be connected by threading or plugging. In order to facilitate replacement, in this embodiment, the reducer ring 3 and the mounting groove are connected by plugging. Therefore, a plurality of positioning grooves 202 are concavely provided on the inner wall of the mounting groove, and a clamping block 301 is convexly provided on the outer circumferential surface of the reducer ring 3, and the clamping block 301 is plugged into the positioning groove 202.

[0044] Since high pressure gas needs to be injected into the safety valve 26 when the opening pressure is detected, the sealing effect between the mounting flange 2601 and the contact surface of the mounting plate 2 must be ensured to prevent leakage from affecting the detection effect. To this end, in this embodiment, an annular sealing groove 201 is concavely provided at the bottom of the mounting groove, and a sealing ring 203 is provided inside the sealing groove 201. The sealing ring 203 is an annular sheet, and its top surface is higher than the bottom surface of the mounting groove.

[0045] The fixer comprises an arc rod 7, the arc rod 7 has an arc of 180° and is arranged in a semicircle. The two ends of the arc rod 7 are connected to the downwardly arranged pressing blocks 4 through the connecting rod 5. The outer side of the arc rod 7 is provided with two symmetrically arranged rotating shafts 8, and the rotating shafts 8 are rotatably connected to the vertical tube 1 through the rotating shaft bracket 101. The rotating shaft bracket 101 is fixedly connected to the vertical tube 1, and the rotating shaft 8 is inserted into the socket on the rotating shaft bracket 101, and the two are rotatably connected.

[0046] The arc rod 7 is sleeved with a sleeve 9, which is located at the vertex of the arc plate 7. The sleeve 9 is connected to a cylinder, which controls the sleeve 9 to move up and down, thereby driving the pressing block 4 to rotate around the axis of the rotating shaft 8 to achieve the compression and unlocking of the safety valve 26. The shape of the pressing block 4 is an arc plate, which increases the contact area and thus improves the compression effect.

[0047] The arc plate 7 drives the pressing block 4 to move up and down through the lever principle, so the connection between the arc rod 7 and the sleeve 9 will not only produce vertical displacement, but also horizontal displacement. In order to prevent the sleeve 9 from interfering with the movement of the arc rod 7, the inner hole of the sleeve 9 is a waist-shaped hole, and the cross-section of the arc rod 7 is a circle.

[0048] For mounting flanges 2601 with different outer diameters, it is necessary to adjust the position of the pressing block 4 to optimize the escort effect. In order to adjust the position of the pressing block 4, the connecting rod 5 includes a vertical rod, a horizontal rod, and an inclined rod connected between the vertical rod and the horizontal rod. The vertical rod is fixedly connected to the pressing block 4, and the horizontal rod of the connecting rod 5 is rotatably connected to the adjusting rod 6. An adjusting hole is provided on the arc plate 7, and the adjusting rod 6 passes through the adjusting hole. The adjusting hole can be a threaded hole, and the adjusting rod 6 is a screw, and the two are threadedly connected.

[0049] The vertical pipe 1 is connected to a main gas pipe 18, and the main gas pipe 18 is connected to the vertical pipe 1 through a variable diameter flow guide pipe 20. The air inlet end of the main gas pipe 18 is connected to a high-pressure gas providing device 17, which can be a high-pressure gas cylinder or an air compressor. In this embodiment, an air compressor is used.

[0050] The main gas pipe 18 is connected in series with a second stop valve 19, and the fixture is provided with a position detection device 15, which is used to detect whether the fixture fixes the safety valve 26. When the fixture fixes the safety valve 26, the second stop valve 19 opens.

[0051] The vertical pipe 1 is connected in series with an open vent pipe 102, and the vent pipe 102 is connected in series with a first stop valve 103. The first stop valve 103 and the second stop valve 19 are both electrically controlled valves. After the position detection device 15 detects that the fixer contacts the safety valve 26, the second stop valve 19 is closed and the first stop valve 103 is opened. The main function of the vent pipe 102 is that after the test of the safety valve 26 is completed, the safety valve needs to be removed. Before removing it, it is necessary to ensure that the air pressure inside the vertical pipe 1 is reduced to avoid high-pressure gas from spraying out when the safety valve 26 is removed, which may cause safety hazards.

[0052] The control gas of the cylinder is supplied by the main gas pipe 18. In order to ensure that the pressing block 4 can press the mounting flange 2601 before the second stop valve 19 is opened to realize the linkage between the two, in this embodiment, the cylinder includes a vertically arranged piston chamber 13, the bottom of the piston chamber 13 is connected to the main gas pipe 18 through the joint control gas pipe 1301, and the joint connection between the joint control gas pipe 1301 and the main gas pipe 18 is located at the air inlet end of the second stop valve 19, and the air outlet end of the second stop valve 19 is connected to the vertical pipe 1.

[0053] A piston 1001 is provided inside the piston chamber 13, a telescopic rod 10 is fixed on the piston 1001, the top of the telescopic rod 10 is fixedly connected to the sleeve 9, a first spring 14 is sleeved on the telescopic rod 10 located inside the piston chamber 13, and the piston chamber 13 is fixedly connected to the vertical tube 1.

[0054] The position detection device 15 is connected to the piston chamber 13. The position detection device 15 adopts a through-beam photoelectric sensor or a touch switch.

[0055] Therefore, when the high-pressure gas providing device 17 provides high-pressure gas, the high-pressure gas first flows into the main gas pipe 18. At this time, the second stop valve 19 is closed and cannot enter the vertical pipe 1. The high-pressure gas is first injected into the piston chamber 13 through the joint control gas pipe 1301, pushing the piston 1001 to overcome the thrust of the first spring 14 and move upward, and then pushing the arc rod 7 upward, so that the pressure block 4 moves downward and presses the mounting flange 2601. When the piston 1001 moves to the top, the position detection device 15 detects the piston 1001. If the position detection device 15 uses a photoelectric sensor, the piston 1001 blocks the transmitting end and the receiving end of the photoelectric sensor; if the position detection device 15 uses a touch switch, the piston 1001 contacts the touch switch. At this time, the second stop valve 19 is opened, and the high-pressure gas flows into the vertical pipe 1, and the pressure is continued to complete the calibration of the safety valve 26.

[0056] In order to prevent the telescopic rod 10 from bending, a guide sleeve 11 is sleeved on the outside of the telescopic rod 10 , and the guide sleeve 11 is fixedly connected to the vertical tube 1 through a fixing frame 12 .

[0057] When the air pressure reaches the opening pressure of the safety valve 26, the safety valve 26 opens and the gas is discharged through the exhaust port 2602 of the safety valve 26. Then the high-pressure gas supply device 17 stops working and the pressure inside the main gas pipe 18 decreases. Fig.12 As shown, the highest point of the pressure curve is the opening pressure of the safety valve 26.

[0058] Therefore, when the pressure curve starts to go down, the first stop valve 103 can be opened electrically, the vent pipe 102 is vented, the air pressure inside the main air pipe 18 is reduced, the piston 1001 moves down, the pressing block 4 moves up, and the pressure on the mounting flange 2601 is released.

[0059] Since both the vent pipe 102 and the exhaust port 2602 will discharge high-pressure gas, in order to avoid the discharged high-pressure gas from causing harm to the operating personnel. In this embodiment, a bottom cabinet 22 with heat dissipation holes is fixed on the support platform 21, and the high-pressure gas providing device 17 is arranged inside the bottom cabinet 22. A limiting frame 23 is fixed above the bottom cabinet 22, and a front baffle 2301 is provided on the end of the limiting frame 23 facing the exhaust port 2602. A buffer box 24 is provided inside the limiting frame 23, and the buffer box 24 is openly arranged on one side facing the exhaust port 2602, and the high-pressure gas discharged from the exhaust port 2602 and the vent pipe 102 is sprayed into the buffer box 24.

[0060] The rear end of the buffer box 24 is spaced apart from the limiting frame 23 , and a second spring 25 is provided therebetween. High-pressure gas is sprayed into the buffer box 24 , or the buffer box 24 moves backward to compress the second spring 25 to consume the energy of the high-pressure gas.

[0061] The buffer box 24 is provided with an inclined guide plate 2401 inside, the bottom surface of the buffer box 24 is provided with a plurality of through holes 2402, and the top surface of the bottom cabinet 22 is provided with a plurality of waist-shaped holes 2201, and the through holes 2402 are arranged corresponding to the waist-shaped holes 2201. The high-pressure gas sprayed into the buffer box 24 is guided by the guide plate 2401 and blown downward, and then flows into the bottom cabinet 22 through the through holes 2402 and the waist-shaped holes 2201, and blows to the high-pressure gas providing device 17, which is forced to be air-cooled.

[0062] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A safety valve online detection device, characterized in that: The valve body installation device comprises a mounting plate (2) and a fixing device, wherein the mounting plate (2) is used to support the safety valve (26), and the fixing device is used to fix the safety valve (26) to the mounting plate (2); The bottom of the installation plate (2) is connected to a vertical pipe (1), the vertical pipe (1) is provided with a pressure detection device (16), the vertical pipe (1) is connected to a main gas pipe (18), and the air inlet end of the main gas pipe (18) is connected to a high-pressure gas providing device (17); A second stop valve (19) is connected in series to the main gas pipe (18), and a position detection device (15) is provided on the fixture. The position detection device (15) is used to detect whether the fixture fixes the safety valve (26). When the fixture fixes the safety valve (26), the second stop valve (19) is opened. The fixing device comprises an arc-shaped rod (7), the two ends of which are connected to downwardly arranged pressing blocks (4) via connecting rods (5), and two symmetrically arranged rotating shafts (8) are arranged outside the arc-shaped rod (7), and the rotating shafts (8) are rotatably connected to the vertical tube (1); The arc-shaped rod (7) is sleeved with a sleeve (9), and the sleeve (9) is connected to a cylinder. The cylinder controls the sleeve (9) to move up and down, thereby driving the pressure block (4) to rotate around the axis of the rotating shaft (8), thereby achieving the tightening and unlocking of the safety valve (26).

2. The safety valve online detection device according to claim 1, characterized in that: The vertical pipe (1) is connected in series with an open-ended vent pipe (102), and the vent pipe (102) is connected in series with a first stop valve (103). After the position detection device (15) detects that the fixer releases the fixation of the safety valve (26), the second stop valve (19) is closed and the first stop valve (103) is opened.

3. The safety valve online detection device according to claim 2, characterized in that: The control air of the cylinder is supplied by the main air pipe (18).

4. The safety valve online detection device according to claim 3 is characterized in that: The cylinder comprises a vertically arranged piston chamber (13), the bottom of the piston chamber (13) is connected to the main air pipe (18) through a joint control air pipe (1301), and the joint connection between the joint control air pipe (1301) and the main air pipe (18) is located at the air inlet end of the second stop valve (19); A piston (1001) is provided inside the piston chamber (13), a telescopic rod (10) is fixed on the piston (1001), the top of the telescopic rod (10) is fixedly connected to the sleeve (9), a first spring (14) is sleeved on the telescopic rod (10) located inside the piston chamber (13), and the piston chamber (13) is fixedly connected to the vertical tube (1).

5. The safety valve online detection device according to claim 4, characterized in that: The position detection device (15) is connected to the piston chamber (13).

6. The safety valve online detection device according to claim 5, characterized in that: The position detection device (15) adopts a photoelectric sensor or a touch switch.

7. An online detection device for a safety valve according to any one of claims 3 to 6, characterized in that: The main gas pipe (18) and the vertical pipe (1) are connected via a flow guide pipe (20) with a variable diameter.

8. An online detection device for a safety valve according to any one of claims 3 to 6, characterized in that: The installation plate (2) is provided with an installation groove in the middle, and a through hole is provided in the center of the installation groove, which is connected to the vertical pipe (1). The installation flange (2601) at the bottom of the safety valve (26) is clamped in the installation groove, and the pressure block (4) is pressed above the installation flange (2601).

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