A safety valve air tightness detection device

Abstract

The present invention discloses a safety valve air tightness detection device, which relates to the technical field of safety valve detection; in order to solve the problem that the air tightness of the connection part between the pressure relief branch pipe and the valve body cannot be quickly and accurately detected, which affects the overall detection efficiency of the safety valve; specifically, a protective cover, the inner wall of the protective cover is slidably connected with a movable frame, the inner wall of the movable frame is fixed with a limiting sleeve, the inner wall of the limiting sleeve is plugged with a safety valve body, the safety valve body includes a safety valve body, an outlet pipe and an inlet pipe, a blocking rod is fixed to the inner wall of one side of the protective cover, an electric hydraulic push rod is fixed to the inner wall of the top of the protective cover, and the output shaft of the electric hydraulic push rod is fixed with a first piston plate. The present invention can complete the comprehensive detection of the air tightness of the safety valve, the air tightness of the connection part between the outlet pipeline and the valve body, and the functionality of the safety valve when the electric hydraulic push rod pushes the first piston plate back and forth, thereby improving the detection efficiency of the safety valve.

Description

Technical Field

[0001] The invention relates to the technical field of safety valve detection, and in particular to a safety valve air tightness detection device. Background Art

[0002] Safety valves belong to the category of automatic valves. They can use the pressure of the medium itself in the installed pipeline system to discharge the medium of the rated flow rate, and can thereby achieve overpressure protection of the system. When producing safety valves, it is necessary to test the air tightness of the safety valves. The existing method is usually to use a pressurizing device to fill the inlet pipeline of the safety valve with gas or fluid medium of a pressure corresponding to the safety standard, observe whether there is medium overflow at the connection between the inlet pipeline and the valve body, and observe whether there is medium outflow from the outlet pipeline. If there is no medium outflow, it indicates that the air tightness of the connection between the inlet pipeline and the valve body is good, and the resistance of the spring to the valve core meets the pressure standard required by the safety valve. Then continue to increase the pressure applied to the medium so that the pressure of the medium on the valve core exceeds the resistance of the spring. If the medium filled in the inlet pipeline is discharged through the outlet pipeline, it indicates that the pressure standard of the safety valve meets the use requirements. If the medium is not discharged through the outlet pipeline, it indicates that the spring resistance in the safety valve is too large or the valve core is stuck, indicating that the safety valve does not meet the use standards.

[0003] Through the existing air tightness detection method, the air tightness of the connection between the inlet pipeline and the valve body, whether the spring resistance in the safety valve is qualified, and whether the valve core is stuck can be detected at one time. However, when the safety valve is used in certain hazardous chemicals and high-pollution fields, it is also necessary to detect the air tightness between the outlet pipeline and the valve body to prevent certain high-risk and high-pollution media from leaking through the outlet pipeline. At this time, the staff also needs to remove the safety valve, and then connect the outlet pipeline to the pressurizing equipment, and then they can detect the air tightness between the outlet pipeline and the valve body;

[0004] At the same time, by installing pressure sensors on both the inlet and outlet pipelines, and comparing whether there is a deviation between the input medium pressure and the output medium pressure, it is determined whether the air tightness of the valve body is qualified. However, this method is not convenient for the staff to determine the specific leakage location of the valve body, and it is not convenient for subsequent maintenance of the valve body.

[0005] After searching, the Chinese patent application number CN202310613830.0 discloses a water heater safety valve and its air tightness detection equipment, including a safety valve body and a pressure relief unit, etc.; the pressure relief unit is connected to the safety valve body, but the above technical scheme does not have a corresponding mechanism that can effectively detect the air tightness of the connection between the pressure relief branch pipe and the valve body. Therefore, there is still a problem that the air tightness of the connection between the pressure relief branch pipe and the valve body cannot be quickly and accurately detected, resulting in the staff having to remove the safety valve to re-test the air tightness between the pressure relief branch pipe and the valve body, thereby affecting the overall detection efficiency of the safety valve. Summary of the invention

[0006] The purpose of the present invention is to solve the shortcomings in the prior art and to propose a safety valve air tightness detection device.

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

[0008] A safety valve air tightness detection device comprises a protective cover, wherein the inner wall of the protective cover is slidably connected with a movable frame, a limiting sleeve is fixed on the inner wall of the movable frame, a safety valve body is plugged into the inner wall of the limiting sleeve, the safety valve body comprises a safety valve body, an outlet pipe and an inlet pipe, and a stop rod is fixed on the inner wall of one side of the protective cover;

[0009] An electric hydraulic push rod is fixed to the inner wall of the top of the protective cover, a first piston plate is fixed to the output shaft of the electric hydraulic push rod, a first transparent tube body is slidably connected to the outer wall of the first piston plate, a liquid infusion valve and a first hydraulic oil valve are respectively arranged on the outer wall of the first transparent tube body, a support plate is fixed to the inner wall of the bottom of the protective cover, a movable plate is slidably connected to the outer wall of the top of the support plate, a first hydraulic cylinder is fixed to the outer wall of one side of the movable plate, a second piston plate is fixed to the output shaft of the first hydraulic cylinder, a second transparent tube body is slidably connected to the outer wall of the second piston plate, and the second transparent tube body is fixed to the outer wall of the movable plate;

[0010] A rubber bellows is fixed to the outer wall of one side of the second transparent tube body, a plug is fixed to the outer wall of one side of the rubber bellows, an absorbent paper tube is arranged on the outer wall of the plug, the plug is slidably connected to the inner wall of the outlet pipe, an extrusion mechanism is arranged on the plug and the outer wall of the first transparent tube body, a second hydraulic oil valve is arranged on the outer wall of one side of the first hydraulic cylinder, and the second hydraulic oil valve is connected to the first hydraulic oil valve through a hydraulic oil pipe.

[0011] Preferably: a second pressure sensor is provided on the outer wall of the bottom of the first piston plate, a first pressure sensor is provided on the outer wall of the second transparent tube body, a first drain valve is provided on the outer wall of the second transparent tube body, a control panel is fixed on the outer wall of the protective cover, and the electric hydraulic push rod, the first drain valve, the first pressure sensor and the second pressure sensor are respectively connected to the control panel.

[0012] Further: the extrusion mechanism includes a second hydraulic cylinder, a second liquid discharge valve, a first elastic telescopic rod, an L-shaped plate, a guide groove and an L-shaped baffle, the input end of the second hydraulic cylinder passes through the outer wall of the first transparent tube body, the second liquid discharge valve is arranged on the outer wall of the second hydraulic cylinder, the L-shaped plate is fixed on the outer wall of the insert tube, the first elastic telescopic rod is fixed on one side outer wall of the second transparent tube body, the telescopic end of the first elastic telescopic rod is fixed on one side outer wall of the insert tube, the guide groove is arranged on one side outer wall of the L-shaped plate, the L-shaped baffle is slidably connected to the inner wall of the guide groove, the L-shaped baffle and the outer wall of the L-shaped plate are provided with a pushing component, and the second liquid discharge valve is electrically connected to the control panel.

[0013] Further preferred: the pushing assembly includes a second cylinder, an exhaust valve and a second elastic telescopic rod, the second cylinder is fixed on the top outer wall of the L-shaped plate, the output shaft of the second cylinder passes through the top outer wall of the L-shaped plate, a group of second elastic telescopic rods are fixed on the output shaft of the second cylinder, the telescopic end of the second elastic telescopic rod is arranged on the top outer wall of the L-shaped baffle, the exhaust valve is arranged on the outer wall of the second transparent tube body, and the exhaust valve is connected to the input end of the second cylinder through an air supply pipeline.

[0014] As a preferred embodiment of the present invention: a partition is fixed to the top outer wall of the protective cover, the movable plate is slidably connected to the top outer wall of the partition, and a pin hole is opened on the top outer wall of the partition.

[0015] As a further preferred embodiment of the present invention: a recovery pipe is fixed to the outer wall of the top of the protective cover, and the recovery pipe is connected to the first liquid discharge valve and the second liquid discharge valve respectively through pipelines.

[0016] As a further solution of the present invention: a limiting rod is fixed to the inner wall of one side of the first transparent tube body and the second transparent tube body respectively.

[0017] On the basis of the above scheme: a support block is fixed on the top outer wall of the movable frame, the top outer wall of the support block is arranged on the outer wall of the outlet pipe, and a sealing cover is fixed on the bottom outer wall of the first transparent tube body.

[0018] On the basis of the above scheme, it is preferred that: a rectangular through groove is opened on the outer wall of one side of the protective cover, a group of sliders are slidably connected to the inner wall of the rectangular through groove, the outer wall of one side of the slider is connected to a clamping ring through a torsion spring, and the inner wall of the clamping ring is provided with a water-absorbing sponge pad; a group of first cylinders are fixed to the outer wall of one side of the protective cover, the output shaft of the first cylinder is fixed on the outer wall of one side of the slider, and a group of elastic airbags are fixed to the inner wall of one side of the protective cover, and the output end of the elastic airbag is connected to the input end of one side of the first cylinder through an air supply pipeline.

[0019] Based on the above solution, it is preferred that: a hollow sponge ring is provided on the inner wall of the clamping ring, and wavy patterns are respectively formed on the outer walls on both sides of the hollow sponge ring.

[0020] The beneficial effects of the present invention are:

[0021] 1. The present invention enables the staff to accurately detect the maximum pressure value that the safety valve can withstand and whether the air tightness of the inlet pipeline and the safety valve body is qualified. At the same time, when the electric hydraulic push rod drives the first piston plate to move upward and reset, the thrust of the hydraulic oil reflux can be used when the first piston plate is reset to squeeze the colored liquid entering the second transparent tube body, and the air tightness between the outlet pipeline and the safety valve body can be detected. In the process of the electric hydraulic push rod pushing the first piston plate back and forth, the air tightness of the safety valve, the air tightness of the connection between the outlet pipeline and the valve body, and the functionality of the safety valve can be fully detected, thereby improving the detection efficiency of the safety valve.

[0022] 2. When the control panel controls the electric hydraulic push rod to push the first piston plate to move downward on the inner wall of the first transparent tube body, it can continuously apply pressure to the colored liquid inside the first transparent tube body and the inlet pipe. At this time, the squeezing mechanism will squeeze the cannula out of the outlet pipe for a certain distance. When the absorbent paper tube that follows the cannula out of the outlet pipe is dyed, it indicates that the water pressure inside the inlet pipe has reached the bearing limit of the valve core. The pressure value at this time is the safety pressure threshold of the safety valve being tested.

[0023] 3. When the first hydraulic cylinder drives the second piston plate to move backward against the inner wall of the second transparent tube body through the output shaft, the second piston plate will push the gas between the second transparent tube body and the inner wall into the pushing component of the outer wall of the L-shaped plate, so that the pushing component pushes the L-shaped baffle to move downward, thereby releasing the obstruction of the L-shaped baffle to the output shaft of the second hydraulic cylinder. At this time, the cannula will be fully reinserted into the inner wall of the outlet pipe under the elastic force of the first elastic telescopic rod, so that the connection between the cannula and the outlet pipe is tighter, and the sealing of the connection between the cannula and the outlet pipe is improved by the thrust of the first elastic telescopic rod, so that the colored liquid can smoothly pass through the cannula into the second transparent tube body.

[0024] 4. When the staff pushes the movable frame equipped with the safety valve into the inner wall of the protective cover, the movable frame will squeeze the elastic airbag. After the elastic airbag is squeezed, the internal gas will be filled into the first cylinder, so that the first cylinder pushes the slider on one side to move forward, so that a group of clamping rings connected by a torsion spring on one side of the slider can be sleeved on the bottom of the flange at the top of the inlet pipe. At this time, the absorbent sponge pad on the clamping ring can absorb the colored liquid overflowing from the connection between the inlet pipe and the first transparent tube body, so as to prevent the overflowed colored liquid from flowing to the outer wall of the safety valve body, affecting the staff's judgment on the air tightness of the safety valve, and improving the accuracy of the test results.

[0025] 5. When the detection is completed, the liquid inside the second hydraulic cylinder will be discharged through the second discharge valve, and the extended output shaft will be retracted. At the same time, the second piston plate will move forward and reset under the push of the first hydraulic cylinder. At this time, the second piston plate moving forward will re-absorb the gas filled in the second cylinder into the second transparent tube body through the exhaust valve and the gas pipeline, so that the second cylinder can drive the second elastic telescopic rod and the L-shaped baffle to move upward and reset. The second elastic telescopic rod can provide a certain buffer and elasticity to the L-shaped baffle to prevent the L-shaped baffle from colliding and getting stuck with the output shaft of the retracting second hydraulic cylinder when it rises. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the main structure of a safety valve air tightness detection device proposed by the present invention;

[0027] Figure 2 A schematic diagram of the protective cover structure of a safety valve air tightness detection device proposed by the present invention;

[0028] Figure 3 An exploded diagram of the internal structure of a protective cover of a safety valve air tightness detection device proposed by the present invention;

[0029] Figure 4 This is a schematic diagram of a first transparent tube body of a safety valve air tightness detection device proposed by the present invention descending to the top of the safety valve;

[0030] Figure 5 A schematic diagram of an electric hydraulic push rod of a safety valve air tightness detection device proposed by the present invention squeezing liquid in a first transparent tube;

[0031] Figure 6 A schematic diagram of an electric hydraulic push rod of a safety valve air tightness detection device proposed by the present invention squeezing liquid in a first transparent tube into a second transparent tube;

[0032] Figure 7 This is a schematic diagram of the driving mechanism structure of a safety valve air tightness detection device proposed by the present invention;

[0033] Figure 8 A schematic diagram of the safety valve structure of a safety valve air tightness detection device proposed by the present invention;

[0034] Fig. 9 A schematic diagram of the movable frame structure of a safety valve air tightness detection device proposed by the present invention;

[0035] Fig.10 This is a schematic diagram of the structure of a hollow sponge ring of a safety valve air tightness detection device proposed by the present invention;

[0036] Fig.11The present invention provides a circuit flow diagram of a safety valve air tightness detection device.

[0037] In the figure: 1 protective cover, 2 movable plate, 3 control panel, 4 pin hole, 5 partition, 6 sealing door, 7 first hydraulic oil valve, 8 electric hydraulic push rod, 9 infusion valve, 10 first transparent tube, 11 sealing cover, 12 clamping ring, 13 recovery tube, 14 cannula, 15 first drain valve, 16 support plate, 17 first piston plate, 18 first hydraulic cylinder, 19 exhaust valve, 20 second transparent tube, 21 first pressure sensor, 22 water-absorbing sponge pad, 23 safety valve body, 24 inlet pipe, 25 slider, 26 movable frame, 27 limiting sleeve, 28 elastic airbag, 29 rectangular through groove, 30 first cylinder, 31 support block, 32 outlet pipe, 33 absorbent paper tube, 34 first elastic telescopic rod, 35 rubber bellows, 36 second piston plate, 37 second hydraulic oil valve, 38 limiting rod, 39 second cylinder, 40 L-type plate, 41 second hydraulic cylinder, 42 second drain valve, 43 stop rod, 44 second pressure sensor, 45 second elastic telescopic rod, 46 guide groove, 47 L-type baffle, 48 hollow sponge ring. DETAILED DESCRIPTION

[0038] The technical solution of the present invention is further described in detail below in conjunction with specific implementation methods.

[0039] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0040] Embodiment 1:

[0041] A safety valve air tightness detection device, such as Figure 1-10 As shown, it includes a protective cover 1, the inner wall of the protective cover 1 is slidably connected with a movable frame 26, the inner wall of the movable frame 26 is fixed with a limiting sleeve 27, the inner wall of the limiting sleeve 27 is plugged with a safety valve body, the safety valve body includes a safety valve body 23, an outlet pipe 32 and an inlet pipe 24, and a stop rod 43 is fixed to the inner wall of one side of the protective cover 1;

[0042] An electric hydraulic push rod 8 is fixed to the inner wall of the top of the protective cover 1, and a first piston plate 17 is fixed to the output shaft of the electric hydraulic push rod 8. A first transparent tube body 10 is slidably connected to the outer wall of the first piston plate 17. A liquid infusion valve 9 and a first hydraulic oil valve 7 are respectively provided on the outer walls of the first transparent tube body 10. A support plate 16 is fixed to the inner wall of the bottom of the protective cover 1. A movable plate 2 is slidably connected to the outer wall of the top of the support plate 16. A first hydraulic cylinder 18 is fixed to the outer wall of one side of the movable plate 2. A second piston plate 36 is fixed to the output shaft of the first hydraulic cylinder 18. A second transparent tube body 20 is slidably connected to the outer wall of the second piston plate 36. The second transparent tube body 20 is fixed to the outer wall of the movable plate 2.

[0043] A rubber bellows 35 is fixed to the outer wall of one side of the second transparent tube body 20, a plug 14 is fixed to the outer wall of one side of the rubber bellows 35, a water-absorbing paper tube 33 is arranged on the outer wall of the plug 14, the plug 14 is slidably connected to the inner wall of the outlet pipe 32, a squeezing mechanism is arranged on the outer wall of the plug 14 and the first transparent tube body 10, a second hydraulic oil valve 37 is arranged on the outer wall of one side of the first hydraulic cylinder 18, and the second hydraulic oil valve 37 is connected to the first hydraulic oil valve 7 through a hydraulic oil pipe;

[0044] The bottom outer wall of the first piston plate 17 is provided with a second pressure sensor 44, the inner wall of the second transparent tube body 20 is provided with a first pressure sensor 21, the outer wall of the second transparent tube body 20 is provided with a first drain valve 15, the outer wall of the protective cover 1 is fixed with a control panel 3, and the electric hydraulic push rod 8, the first drain valve 15, the first pressure sensor 21 and the second pressure sensor 44 are respectively connected to the control panel 3;

[0045] The squeezing mechanism includes a second hydraulic cylinder 41, a second liquid discharge valve 42, a first elastic telescopic rod 34, an L-shaped plate 40, a guide groove 46 and an L-shaped baffle 47. The input end of the second hydraulic cylinder 41 passes through the outer wall of the first transparent tube body 10, the second liquid discharge valve 42 is arranged on the outer wall of the second hydraulic cylinder 41, the L-shaped plate 40 is fixed on the outer wall of the insertion tube 14, the first elastic telescopic rod 34 is fixed on one side outer wall of the second transparent tube body 20, the telescopic end of the first elastic telescopic rod 34 is fixed on one side outer wall of the insertion tube 14, the guide groove 46 is arranged on one side outer wall of the L-shaped plate 40, the L-shaped baffle 47 is slidably connected to the inner wall of the guide groove 46, the L-shaped baffle 47 and the outer wall of the L-shaped plate 40 are provided with a pushing component, and the second liquid discharge valve 42 is electrically connected to the control panel 3.

[0046] The staff first inserts the safety valve to be tested into the limit sleeve 27, then opens the sealing door 6 to insert the limit sleeve 27 and the movable frame 26 into the protective cover 1, so that the inlet pipe 24 of the safety valve inside the limit sleeve 27 can be aligned with the first transparent tube body 10 at the bottom of the electric hydraulic push rod 8, and then the staff closes the sealing door 6, and pushes the first hydraulic cylinder 18 and the second transparent tube body 20 forward through the movable plate 2 until the cannula 14 on one side of the second transparent tube body 20 is inserted into the outlet pipe 32, and then the staff transports the colored liquid to the inside of the infusion valve 9 through the pipeline until the top liquid level of the colored liquid stops transporting after the corresponding distance is between the first piston plate 17, and then the staff The operator starts the electric hydraulic push rod 8 through the control panel 3, pushes the first piston plate 17 downward, and squeezes the colored liquid entering the first transparent tube body 10, the inlet pipe 24 and the safety valve body 23. The second pressure sensor 44 at the bottom of the first piston plate 17 can detect the pressure. According to the real-time pressure value monitored by the pressure sensor, it is observed whether there is colored liquid seeping out of the connection between the inlet pipe 24 and the safety valve body 23, at what pressure the colored liquid can flow out of the outlet pipe 32, and whether there is colored liquid seeping out of the connection between the outlet pipe 32 and the safety valve body 23, so as to judge whether the safety valve is qualified;

[0047] When the first piston plate 17 squeezes the liquid inside the first transparent tube body 10 and the inlet pipe 24, a part of the pressurized liquid inside the first transparent tube body 10 will be squeezed into the second hydraulic cylinder 41, so that the output shaft of the second hydraulic cylinder 41 pushes the L-shaped baffle 47 and the L-shaped plate 40 to drive the cannula 14 to move backward a certain distance, so that a part of the cannula 14 inserted into the outlet pipe 32 is moved out of the outlet pipe 32, and a part of the absorbent paper tube 33 wrapped around the outer wall of the cannula 14 can leak out. When the liquid inside the first transparent tube body 10 and the safety valve body 23 penetrates into the outlet pipe 32 through the valve core inside the safety valve body 23 under the current pressure, it will be immediately absorbed by the absorbent paper tube 33, so that the corresponding part of the outer wall of the absorbent paper tube 33 is quickly stained, so that the staff can judge whether the valve core is leaking under the corresponding pressure by relying on a section of the absorbent paper tube 33 pushed out by the second hydraulic cylinder 41.

[0048] Then the control panel 3 will continue to control the electric hydraulic push rod 8 to push the first piston plate 17 to pressurize the liquid inside the first transparent tube body 10 and the safety valve body 23. When the pressure reaches the safety value, the electric hydraulic push rod 8 can push the first piston plate 17 to descend at a uniform speed inside the first transparent tube body 10, and fill the liquid inside the first transparent tube body 10 and the inlet pipe 24 into the outlet pipe 32 through the opened valve core. While moving downward, the first piston plate 17 will suck the hydraulic oil inside the first hydraulic cylinder 18 into the space between the top of the first piston plate 17 and the first transparent tube body 10 through the first hydraulic oil valve 7 and the hydraulic oil pipe on one side of the first transparent tube body 10, so that the output shaft of the first hydraulic cylinder 18 drives the second piston plate 36 to move backward, providing space for the liquid to enter the second transparent tube body 20 through the outlet pipe 32. The staff can judge whether the safety valve will open when the safety threshold is reached by observing the amount of colored liquid filled into the second transparent tube body 20.

[0049] At the same time, when the first hydraulic cylinder 18 drives the second piston plate 36 to move backward on the inner wall of the second transparent tube body 20 through the output shaft, the second piston plate 36 will push the gas between the inner wall of the second transparent tube body 20 into the pushing component of the outer wall of the L-shaped plate 40, so that the pushing component pushes the L-shaped baffle 47 to move downward, thereby releasing the obstruction of the L-shaped baffle 47 to the output shaft of the second hydraulic cylinder 41. At this time, the cannula 14 will be fully reinserted into the inner wall of the outlet pipe 32 under the elastic force of the first elastic telescopic rod 34, so that the connection between the cannula 14 and the outlet pipe 32 is tighter, and the thrust of the first elastic telescopic rod 34 improves the sealing of the connection between the cannula 14 and the outlet pipe 32, so that the colored liquid can smoothly pass through the cannula 14 into the second transparent tube body 20.

[0050] When the electric hydraulic push rod 8 pushes the first piston plate 17 downward to the corresponding position of the inner wall of the first transparent tube body 10, the staff can judge whether the safety valve is opened after reaching the corresponding pressure value by observing the amount of colored liquid inside the second transparent tube body 20. Then the control panel 3 will control the electric hydraulic push rod 8 to drive the first piston plate 17 to move upward. When the first piston plate 17 moves upward, the hydraulic oil at the top will push the first transparent tube body 10 to move upward as a whole, so that the bottom of the first transparent tube body 10 is pulled out from the inside of the inlet pipe 24. When the outer wall of the top of the first transparent tube body 10 rises to the bottom of the blocking rod 43, the blocking rod 43 will block the top of the first transparent tube body 10, so that the continuously rising first piston plate 17 will push the top hydraulic oil through the first hydraulic oil valve 7, the hydraulic oil pipe and the second hydraulic oil valve 37 back into the first hydraulic cylinder 18. At this time, the first hydraulic cylinder 18 will push the second piston plate 36 through the output shaft. When the inner wall of the second transparent tube body 20 moves forward, the colored liquid entering the second transparent tube body 20 is squeezed through the second piston plate 36. The first pressure sensor 21 located inside the second transparent tube body 20 can detect the pressure inside the second transparent tube body 20. When the pressure reaches the set value, the staff can observe whether there is colored liquid seeping out of the connection part between the outlet pipe 32 and the safety valve body 23, and detect the air tightness of the connection part between the outlet pipe 32 and the safety valve body 23. When the pressure value monitored by the first pressure sensor 21 reaches the set value, the control panel 3 will control the first drain valve 15 and the second drain valve 42 to open, and the colored liquid inside the second hydraulic cylinder 41 and the second transparent tube body 20 is discharged and recovered through the pipeline, thereby completing the air tightness and functionality detection of various parts of the safety valve at one time. After the staff opens the sealing door 6, the safety valve after the detection is completed can be pulled out.

[0051] The colored liquid may be red, black, or other color that is clearly different from the surface of the safety valve.

[0052] like Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown, the pushing assembly includes a second cylinder 39, an exhaust valve 19 and a second elastic telescopic rod 45, the second cylinder 39 is fixed on the top outer wall of the L-shaped plate 40, the output shaft of the second cylinder 39 passes through the top outer wall of the L-shaped plate 40, a group of second elastic telescopic rods 45 are fixed on the output shaft of the second cylinder 39, the telescopic end of the second elastic telescopic rod 45 is arranged on the top outer wall of the L-shaped baffle 47, the exhaust valve 19 is arranged on the outer wall of the second transparent tube body 20, and the exhaust valve 19 is connected to the input end of the second cylinder 39 through a gas pipeline;

[0053] When the first piston plate 17 pushes the liquid inside the first transparent tube body 10 to push open the valve core and enter the second transparent tube body 20, the first hydraulic cylinder 18 will drive the second piston plate 36 to move backward, so that the gas inside the second transparent tube body 20 is squeezed into the second cylinder 39 through the exhaust valve 19 and the gas pipeline through the second piston plate 36, and the second elastic telescopic rod 45 is pushed downward by the second cylinder 39, so that the L-shaped baffle 47 is pushed downward by the second elastic telescopic rod 45, so that the L-shaped baffle 47 is moved out of one end of the output shaft of the second hydraulic cylinder 41, and the obstruction to the second hydraulic cylinder 41 is released. At this time, the cannula 14 will move forward under the elastic force of the first elastic telescopic rod 34 and be reinserted into the outlet pipe 32. At the same time, the output shaft extended from the second hydraulic cylinder 41 will pass through the gap between the guide groove 46 and the two second elastic telescopic rods 45 to avoid collision with the guide groove 46 and the second elastic telescopic rod 45 when moving forward;

[0054] When the detection is completed, the liquid inside the second hydraulic cylinder 41 will be discharged through the second drain valve 42, thereby retracting the extended output shaft. At the same time, the second piston plate 36 will also move forward and reset under the push of the first hydraulic cylinder 18. At this time, the second piston plate 36 moving forward will re-absorb the gas filled in the second cylinder 39 into the second transparent tube body 20 through the exhaust valve 19 and the air supply pipeline, so that the second cylinder 39 can drive the second elastic telescopic rod 45 and the L-shaped baffle 47 to move upward and reset. The second elastic telescopic rod 45 can provide a certain buffer and elasticity to the L-shaped baffle 47 to prevent the L-shaped baffle 47 from colliding and getting stuck with the output shaft of the retracting second hydraulic cylinder 41 when it rises.

[0055] like Figure 1-2 As shown, a partition 5 is fixed to the top outer wall of the protective cover 1, and a movable plate 2 is slidably connected to the top outer wall of the partition 5, and a pin hole 4 is opened on the top outer wall of the partition 5; when the staff pushes the movable plate 2 to insert the insert tube 14 on one side of the second transparent tube body 20 into the outlet pipe 32 on one side of the safety valve body 23, the movable plate 2 can be fixed in the pin hole 4 on the top of the partition 5 by the pin, and the movable plate 2 is fixed and limited as a whole in cooperation with the support plate 16, so that the first hydraulic cylinder 18 and the second transparent tube body 20 as a whole can stably complete the detection of the safety valve.

[0056] like Figure 2 As shown, a recovery pipe 13 is fixed to the top outer wall of the protective cover 1, and the recovery pipe 13 is connected to the first drain valve 15 and the second drain valve 42 through pipelines respectively; after the detection is completed, the first drain valve 15 and the second drain valve 42 respectively discharge the internal liquid into the recovery pipe 13 through the pipeline, and the staff can conveniently recover the colored liquid used for detection through the recovery pipe 13.

[0057] like Figure 3 , Figure 6As shown, a limiting rod 38 is fixed to the inner wall of one side of the first transparent tube body 10 and the second transparent tube body 20 respectively; the limiting rod 38 can limit the moving position of the first piston plate 17 and the second piston plate 36 to prevent the first piston plate 17 and the second piston plate 36 from being too close to the inner wall of one side of the first transparent tube body 10 and the second transparent tube body 20 when they are retracted inward, causing the liquid inside the first transparent tube body 10 and the second transparent tube body 20 to flow out through the first hydraulic oil valve 7 and the exhaust valve 19, thereby improving the stability of the detection equipment during operation.

[0058] like Fig. 9 As shown, a support block 31 is fixed to the top outer wall of the movable frame 26, and the top outer wall of the support block 31 is arranged on the outer wall of the outlet pipe 32. A sealing cover 11 is fixed to the bottom outer wall of the first transparent tube body 10; the support block 31 can support the outlet pipe 32 on one side of the safety valve body 23, thereby cooperating with the limiting sleeve 27 to support and limit the safety valve body 23 and the outlet pipe 32 as a whole, thereby improving the stability of the safety valve when being detected, and the sealing cover 11 can improve the sealing performance of the connection between the bottom of the first transparent tube body 10 and the top of the inlet pipe 24.

[0059] When the present embodiment is used, the staff first inserts the safety valve to be tested into the limiting sleeve 27, then opens the sealing door 6 to insert the limiting sleeve 27 and the movable frame 26 into the protective cover 1, so that the inlet pipe 24 of the safety valve inside the limiting sleeve 27 can be aligned with the first transparent tube body 10 at the bottom of the electric hydraulic push rod 8, then the staff closes the sealing door 6, and pushes the first hydraulic cylinder 18 and the second transparent tube body 20 forward through the movable plate 2 until the cannula 14 on one side of the second transparent tube body 20 is inserted into the outlet pipe 32, and then the staff transports the colored liquid into the infusion valve 9 through the pipeline until the top liquid level of the colored liquid is spaced a corresponding distance from the first piston plate 17 and then stops the infusion. Then the staff starts the electric hydraulic push rod 8 through the control panel 3 to push the first piston plate 17 downward to squeeze the colored liquid entering the first transparent tube body 10, the inlet pipe 24 and the safety valve body 23. The second pressure sensor 44 at the bottom of the first piston plate 17 can detect the pressure. According to the real-time pressure value monitored by the pressure sensor, it is observed whether there is any colored liquid seeping out of the connection between the inlet pipe 24 and the safety valve body 23, at what pressure the colored liquid can flow out from the outlet pipe 32, and whether there is any colored liquid seeping out of the connection between the outlet pipe 32 and the safety valve body 23, so as to judge whether the safety valve is qualified.

[0060] Embodiment 2:

[0061] A safety valve air tightness detection device, such as Figure 2 , Figure 8 , Fig. 9As shown, this embodiment makes the following improvements on the basis of embodiment 1: a rectangular through groove 29 is opened on the outer wall of one side of the protective cover 1, and a group of sliders 25 are slidably connected to the inner wall of the rectangular through groove 29, and the outer wall of one side of the slider 25 is connected to the clamping ring 12 through a torsion spring, and the inner wall of the clamping ring 12 is provided with a water-absorbing sponge pad 22; a group of first cylinders 30 are fixed to the outer wall of one side of the protective cover 1, and the output shaft of the first cylinder 30 is fixed to the outer wall of one side of the slider 25, and a group of elastic air bags 28 are fixed to the inner wall of one side of the protective cover 1, and the output end of the elastic air bag 28 is connected to the input end of one side of the first cylinder 30 through the air supply pipeline; when the staff pushes the movable frame 26 equipped with the safety valve into the protective cover 1, the movable frame 26 will squeeze the elastic airbag 28. After the elastic airbag 28 is squeezed, the internal gas will be filled into the first cylinder 30, so that the first cylinder 30 pushes the slider 25 on one side to move forward, so that a group of clamping rings 12 connected by a torsion spring on one side of the slider 25 can be sleeved on the bottom of the top flange of the inlet pipe 24. At this time, the water-absorbing sponge pad 22 located on the clamping ring 12 can absorb the colored liquid overflowing from the connection between the inlet pipe 24 and the first transparent tube body 10, so as to prevent the overflowed colored liquid from flowing to the outer wall of the safety valve body 23, affecting the staff's judgment of the air tightness of the safety valve, and improving the accuracy of the detection result.

[0062] like Fig.10 As shown, a hollow sponge ring 48 is provided on the inner wall of the clamping ring 12, and wavy patterns are respectively provided on the outer walls on both sides of the hollow sponge ring 48; the hollow sponge ring 48 has good elasticity and extensibility due to its hollow structure. When the clamping ring 12 is sleeved on the bottom of the inlet pipe 24, the hollow sponge ring 48 located inside the clamping ring 12 can be tightly attached to the bottom of the gap between the inlet pipe 24 and the sealing cover 11 through its own elastic force. At the same time, after the hollow sponge ring 48 is squeezed, the contact surface between the inlet pipe 24 and the sealing cover 11 will increase, thereby better shielding and sealing the gap between the inlet pipe 24 and the sealing cover 11 to prevent colored liquid from seeping out.

[0063] When this embodiment is in use, the absorbent sponge pad 22 and the hollow sponge ring 48 located on the clamping ring 12 can absorb the colored liquid overflowing from the connection between the inlet pipe 24 and the first transparent tube body 10, thereby preventing the overflowed colored liquid from flowing onto the outer wall of the safety valve body 23.

[0064] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A safety valve air tightness detection device, comprising a protective cover (1), characterized in that: The inner wall of the protective cover (1) is slidably connected to a movable frame (26), a limiting sleeve (27) is fixed to the inner wall of the movable frame (26), a safety valve body is plugged into the inner wall of the limiting sleeve (27), and the safety valve body comprises a safety valve body (23), an outlet pipe (32) and an inlet pipe (24), and a stop rod (43) is fixed to the inner wall of one side of the protective cover (1); An electric hydraulic push rod (8) is fixed to the inner wall of the top of the protective cover (1), a first piston plate (17) is fixed to the output shaft of the electric hydraulic push rod (8), a first transparent tube (10) is slidably connected to the outer wall of the first piston plate (17), a liquid infusion valve (9) and a first hydraulic oil valve (7) are respectively arranged on the outer wall of the first transparent tube (10), a support plate (16) is fixed to the inner wall of the bottom of the protective cover (1), a movable plate (2) is slidably connected to the outer wall of the top of the support plate (16), a first hydraulic cylinder (18) is fixed to the outer wall of one side of the movable plate (2), a second piston plate (36) is fixed to the output shaft of the first hydraulic cylinder (18), a second transparent tube (20) is slidably connected to the outer wall of the second piston plate (36), and the second transparent tube (20) is fixed to the outer wall of the movable plate (2); A rubber bellows (35) is fixed to the outer wall of one side of the second transparent tube body (20), a plug tube (14) is fixed to the outer wall of one side of the rubber bellows (35), an absorbent paper tube (33) is arranged on the outer wall of the plug tube (14), the plug tube (14) is slidably connected to the inner wall of the outlet pipe (32), a squeezing mechanism is arranged on the outer wall of the plug tube (14) and the first transparent tube body (10), a second hydraulic oil valve (37) is arranged on the outer wall of one side of the first hydraulic cylinder (18), and the second hydraulic oil valve (37) is connected to the first hydraulic oil valve (7) via a hydraulic oil pipe; A second pressure sensor (44) is arranged on the outer wall of the bottom of the first piston plate (17), a first pressure sensor (21) is arranged on the inner wall of the second transparent tube (20), a first liquid discharge valve (15) is arranged on the outer wall of the second transparent tube (20), a control panel (3) is fixed to the outer wall of the protective cover (1), and the electric hydraulic push rod (8), the first liquid discharge valve (15), the first pressure sensor (21) and the second pressure sensor (44) are respectively connected to the control panel (3); The squeezing mechanism comprises a second hydraulic cylinder (41), a second liquid discharge valve (42), a first elastic telescopic rod (34), an L-shaped plate (40), a guide groove (46) and an L-shaped baffle (47); the input end of the second hydraulic cylinder (41) penetrates the outer wall of the first transparent tube (10); the second liquid discharge valve (42) is arranged on the outer wall of the second hydraulic cylinder (41); the L-shaped plate (40) is fixed to the outer wall of the insertion tube (14); the first elastic telescopic rod (34) is fixed to one side outer wall of the second transparent tube (20); the telescopic end of the first elastic telescopic rod (34) is fixed to one side outer wall of the insertion tube (14); the guide groove (46) is arranged on one side outer wall of the L-shaped plate (40); the L-shaped baffle (47) is slidably connected to the inner wall of the guide groove (46); the L-shaped baffle (47) and the outer wall of the L-shaped plate (40) are provided with a pushing component; and the second liquid discharge valve (42) is electrically connected to the control panel (3); The pushing assembly comprises a second cylinder (39), an exhaust valve (19) and a second elastic telescopic rod (45), the second cylinder (39) being fixed on the top outer wall of the L-shaped plate (40), the output shaft of the second cylinder (39) penetrating the top outer wall of the L-shaped plate (40), a group of second elastic telescopic rods (45) being fixed on the output shaft of the second cylinder (39), the telescopic ends of the second elastic telescopic rods (45) being arranged on the top outer wall of the L-shaped baffle (47), the exhaust valve (19) being arranged on the outer wall of the second transparent tube body (20), and the exhaust valve (19) being connected to the input end of the second cylinder (39) via an air supply pipeline; The bottom of the first transparent tube (10) and the top of the inlet pipe (24) are sealed and connected, and the liquid delivery valve (9) is used to deliver liquid to the first transparent tube (10), the inlet pipe (24) and the safety valve body (23); When the first piston plate (17) squeezes the liquid inside the first transparent tube (10) and the inlet pipe (24), part of the pressurized liquid inside the first transparent tube (10) is squeezed into the second hydraulic cylinder (41), so that the output shaft of the second hydraulic cylinder (41) pushes the L-shaped baffle plate (47) and the L-shaped plate (40) to drive the insert tube (14) to move backward a certain distance, so that a part of the insert tube (14) inserted into the outlet pipe (32) moves out of the outlet pipe (32), allowing a part of the absorbent paper tube (33) covered by the outer wall of the insert tube (14) to leak out; When the pressure reaches a safe value, the electric hydraulic push rod (8) can push the first piston plate (17) to descend at a uniform speed inside the first transparent tube (10), and the liquid inside the first transparent tube (10) and the inlet pipe (24) is filled into the outlet pipe (32) through the opened valve core. When the first piston plate (17) moves downward, it will suck the hydraulic oil inside the first hydraulic cylinder (18) into the space between the top of the first piston plate (17) and the first transparent tube (10) through the first hydraulic oil valve (7) and the hydraulic oil pipe on one side of the first transparent tube (10), so that the output shaft of the first hydraulic cylinder (18) drives the second piston plate (36) to move backward; The gas inside the second transparent tube (20) is squeezed into the second cylinder (39) through the exhaust valve (19) and the gas pipeline by the second piston plate (36), and the second elastic telescopic rod (45) is pushed downward by the second cylinder (39), thereby pushing the L-shaped baffle (47) downward by the second elastic telescopic rod (45), so that the L-shaped baffle (47) moves out of one end of the output shaft of the second hydraulic cylinder (41), thereby releasing the obstruction to the second hydraulic cylinder (41). At this time, the cannula (14) will move forward under the elastic force of the first elastic telescopic rod (34) and be reinserted into the outlet pipe (32), and at the same time, the output shaft extended from the second hydraulic cylinder (41) will pass through the gap between the guide groove (46) and the two second elastic telescopic rods (45); When the electric hydraulic push rod (8) pushes the first piston plate (17) to move downward to a position corresponding to the inner wall of the first transparent tube (10), the control panel (3) controls the electric hydraulic push rod (8) to drive the first piston plate (17) to move upward. When the first piston plate (17) moves upward, the hydraulic oil at the top pushes the first transparent tube (10) to move upward as a whole, thereby pulling the bottom of the first transparent tube (10) out of the inlet pipe (24). When the outer wall at the top of the first transparent tube (10) rises to the bottom of the stop rod (43), the first transparent tube (10) is pulled out of the inlet pipe (24). When the first transparent tube (10) is lowered, the blocking rod (43) blocks the top of the first transparent tube (10), thereby allowing the first piston plate (17) to continuously rise and push the hydraulic oil at the top back into the first hydraulic cylinder (18) through the first hydraulic oil valve (7), the hydraulic oil pipe and the second hydraulic oil valve (37). At this time, the first hydraulic cylinder (18) pushes the second piston plate (36) to move forward on the inner wall of the second transparent tube (20) through the output shaft, thereby squeezing the colored liquid entering the second transparent tube (20) through the second piston plate (36).

2. A safety valve air tightness detection device according to claim 1, characterized in that: A partition plate (5) is fixed to the top outer wall of the protective cover (1), the movable plate (2) is slidably connected to the top outer wall of the partition plate (5), and a pin hole (4) is opened on the top outer wall of the partition plate (5).

3. A safety valve air tightness detection device according to claim 2, characterized in that: A recovery pipe (13) is fixed to the outer wall of the top of the protective cover (1), and the recovery pipe (13) is connected to the first liquid discharge valve (15) and the second liquid discharge valve (42) respectively through pipelines.

4. The safety valve air tightness detection device according to claim 1, characterized in that: Limiting rods (38) are respectively fixed to the inner walls of one side of the first transparent tube body (10) and the second transparent tube body (20).

5. The safety valve air tightness detection device according to claim 1, characterized in that: A support block (31) is fixed to the top outer wall of the movable frame (26), the top outer wall of the support block (31) is arranged on the outer wall of the outlet pipe (32), and a sealing cover (11) is fixed to the bottom outer wall of the first transparent tube body (10).

6. A safety valve air tightness detection device according to claim 3, characterized in that: A rectangular through groove (29) is formed on the outer wall of one side of the protective cover (1), and a group of sliders (25) are slidably connected to the inner wall of the rectangular through groove (29). The outer wall of one side of the slider (25) is connected to a clamping ring (12) via a torsion spring, and a water-absorbing sponge pad (22) is arranged on the inner wall of the clamping ring (12); a group of first cylinders (30) are fixed to the outer wall of one side of the protective cover (1), and the output shaft of the first cylinder (30) is fixed to the outer wall of one side of the slider (25); a group of elastic air bags (28) are fixed to the inner wall of one side of the protective cover (1), and the output end of the elastic air bag (28) is connected to the input end of one side of the first cylinder (30) via an air supply pipeline.

7. A safety valve air tightness detection device according to claim 6, characterized in that: The inner wall of the clamping ring (12) is provided with a hollow sponge ring (48), and the outer walls on both sides of the hollow sponge ring (48) are respectively provided with wavy patterns.

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