Performance testing device for valve element of breathing type safety valve

Abstract

The utility model provides a breathing type safety valve element performance testing device, belongs to the technical field of safety valve element performance testing, and aims to solve the problem that a breathing type safety valve testing stand used at present can only test the performance of a breathing type safety valve after being assembled. Comprising a test bench; a test assembly is fixedly arranged on one side of the top of the test bench, and a fixing device is fixedly arranged in the test bench; a valve element structure is arranged in the test assembly, and a pressing mechanism is fixedly arranged at the top of the test bed. Under the condition that the negative pressure value is-1.5 Kpa to-2 Kpa, when the valve element circular plate is sucked to the plane of the test disc, it is judged that the negative pressure test of the suction valve and the valve element structure is qualified; if the negative pressure value is greater than-2Kpa, the pressure of the spring to the valve core circular plate can be increased; on the contrary, if the negative pressure value is smaller than-1.5 Kpa, the pressure applied to the valve element circular plate by the spring can be reduced; the valve core structure can be ensured to be completely qualified before the safety valve is assembled; and reworking of the safety valve caused by unqualified pressure is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of safety valve core performance test, more specifically, it is particularly related to the breathing type safety valve core performance test device. BACKGROUND

[0002] The railway tank car A41XP breathing type safety valve is an indispensable accessory of the tank car, which is usually fixed on the top of the tank body and serves as a ventilation device to ensure the normal state of the tank pressure, prevent the tank from being damaged due to overpressure or overvacuum in the tank, and reduce the liquid evaporation loss. The railway tank car A41XP breathing type safety valve is composed of two parts, namely the relief valve and the suction valve. The currently used breathing type safety valve test bench can only test the performance of the assembled breathing type safety valve, but during the test process, it is found that the unqualified rate of the performance of the assembled breathing type safety valve is more than 50%, and all of them are caused by unqualified assembly of the suction valve compression spring, resulting in high rework rate. In order to completely solve the problem of unqualified assembly of the suction valve compression spring, a breathing type safety valve suction valve negative pressure test bench is developed to ensure that the suction valve is 100% qualified before assembly. SUMMARY

[0003] In order to solve the above technical problems, the utility model provides a breathing type safety valve core performance test device to solve the problem that the currently used breathing type safety valve test bench can only test the performance of the assembled breathing type safety valve.

[0004] The breathing type safety valve core performance test device of the utility model is achieved by the following specific technical means:

[0005] The breathing type safety valve core performance test device comprises a test bench; a control module is fixedly arranged outside the test bench, a control switch is fixedly arranged inside one side of the test bench, and the control module and the control switch are electrically connected; and a vacuum pump is fixedly arranged at the bottom of the test bench.

[0006] A test assembly is fixedly arranged at one side of the top of the test bench, and a fixing device is fixedly arranged inside the test bench; a valve core structure is arranged inside the test assembly, and a compression mechanism is fixedly arranged at the top of the test bench; the test assembly comprises a test disc, a rubber ring, a connecting pipe and an air pressure sensor; the test disc is fixedly arranged at one side of the top of the test bench; the rubber ring is fixedly arranged inside the test disc; the connecting pipe is fixedly arranged at the top end inside the test disc, and the bottom end of the connecting pipe is connected with the air inlet of the vacuum pump; and the air pressure sensor is fixedly arranged inside the test disc.

[0007] In at least some embodiments, the valve core structure comprises: a valve core frame, a vertical rod, a valve core disc and a sealing ring; the valve core frame is movably arranged inside the test disc; the vertical rod is slidably arranged inside the top side of the valve core frame; the valve core disc is fixedly arranged at the bottom end of the vertical rod and movably arranged inside the valve core frame; and the sealing ring is press-fitted inside the valve core frame and abuts against the top of the rubber ring.

[0008] In at least some embodiments, the valve core structure further comprises: an adjusting block and an adjusting nut; the adjusting block is movably arranged outside the top of the vertical rod, a spring member is arranged between the bottom of the adjusting block and the top of the valve core frame, and the spring member is located outside the vertical rod; and the adjusting nut is threadedly connected to the top outside of the vertical rod, and the bottom of the adjusting nut abuts against the top of the adjusting block.

[0009] In at least some embodiments, the fixing device comprises: an electric cylinder, a connecting plate and a fixing clamp jaw; the electric cylinder is fixedly arranged inside the test bench, the electric cylinder is located on both sides of the test disc, and the electric cylinder is electrically connected with the control module; the bottom of the connecting plate is rotatably arranged outside the electric cylinder; one end of the fixing clamp jaw is rotatably arranged outside the telescopic end of the electric cylinder, the fixing clamp jaw is rotatably connected with the connecting plate, and the other end of the fixing clamp jaw abuts against the outside of the valve core frame.

[0010] In at least some embodiments, the pressing mechanism comprises: a pressing frame, a gas pressure display, a hydraulic cylinder, a pressing disc and a containing disc; the pressing frame is fixedly arranged on the top of the test bench; the gas pressure display is fixedly arranged outside the pressing frame and electrically connected with the gas pressure sensor; the hydraulic cylinder is fixedly arranged on the top of the pressing frame; the pressing disc is fixedly arranged at the bottom of the telescopic end of the hydraulic cylinder; the containing disc is fixedly arranged at the bottom of the pressing frame and located directly below the pressing disc, and the valve core frame can be placed inside the containing disc.

[0011] In at least some embodiments, the pressing mechanism further comprises: a fixing rod, a guide plate and a pressing plate; the fixing rod is fixedly arranged at the bottom of the pressing frame; the guide plate is slidably arranged outside the fixing rod, and a spring member is arranged between the top of the guide plate and the top end of the fixing rod; and the pressing plate is fixedly arranged at the top of the guide plate and located directly above the containing disc.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] 1、In the utility model, through setting up the fixing device, the valve core frame can be fixed in the test disc easily and conveniently, through the vacuum pump and the connecting pipe, the valve core frame and the test disc can be extracted to the negative pressure, and through the gas pressure sensor and the gas pressure display, the negative pressure value between the valve core frame and the test disc can be read.

[0014] 2、in the utility model, when the negative pressure value is in the condition of -1.5Kpa--2Kpa, the valve core round plate is sucked to the test disc plane, and it is determined that the suction valve and the valve core structure negative pressure test are qualified;If the negative pressure value is greater than -2Kpa, then the adjusting nut can be screwed down, and the pressure of the spring to the valve core round plate is increased;Conversely, if the negative pressure value is less than -1.5Kpa, then the adjusting nut can be screwed up, and the pressure of the spring to the valve core round plate is reduced;The principle is used to test whether the assembly of the valve core structure is qualified, which can ensure that the valve core structure is 100% qualified before assembling the safety valve;The safety valve rework caused by unqualified pressure is reduced.

[0015] 3、in the utility model, the sealing ring is pre-fixed outside the valve core frame by the guide plate, the pressing plate and the spring part;The phenomenon of displacement of the sealing ring during pressing is prevented;Then the sealing ring is quickly pressed into the valve core frame by the hydraulic cylinder and the pressure plate;The assembly efficiency of the valve core structure is increased, and the functionality of the test device is enhanced. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the overall structure schematic view of the utility model.

[0017] Figure 2 It is the structure schematic view of the fixing device of the utility model.

[0018] Figure 3 It is the structure schematic view of the test assembly of the utility model.

[0019] Figure 4 It is the structure schematic view of the valve core structure of the utility model.

[0020] Figure 5 It is the structure schematic view of the pressing mechanism of the utility model.

[0021] Figure 6 It is the placement structure schematic view of the valve core frame of the utility model.

[0022] In the drawing, the corresponding relationship between the component name and the drawing number is as follows:

[0023] 1, test bench;101, control module;102, vacuum pump;103, control switch;

[0024] 2, test assembly;201, test disc;202, rubber ring;203, connecting pipe;204, air pressure sensor;

[0025] 3, valve core structure;301, valve core frame;302, vertical rod;303, valve core round plate;304, adjusting block;305, adjusting nut;306, sealing ring;

[0026] 4, fixing device; 401, electric cylinder; 402, connecting plate; 403, fixed jaw;

[0027] 5, pressing mechanism; 501, pressing frame; 502, air pressure display; 503, hydraulic cylinder; 504, pressing plate; 505, containing plate; 506, fixed rod; 507, guide plate; 508, pressing plate. DETAILED DESCRIPTION

[0028] The embodiment of the utility model is further described in detail below in combination with the drawings and examples.

[0029] Example one:

[0030] As shown in the accompanying Figure 1 to the accompanying Figure 6 As shown in the accompanying

[0031] The utility model provides breath formula safety valve core performance test device, including test board 1, test board 1 outside fixed setting has control module 101, and test board 1 one side inside fixed setting has control switch 103, and control module 101 is connected with control switch 103 electrically, test board 1 bottom fixed setting has vacuum pump 102,

[0032] In the embodiment of the present application, the test bench 1 is fixedly provided with a test assembly 2 on one side of the top of the test bench 1, and the test bench 1 is fixedly provided with a fixing device 4 inside; the test assembly 2 is provided with a valve core structure 3 inside, and the test bench 1 is fixedly provided with a pressing mechanism 5 on the top of the test bench 1; the test assembly 2 comprises a test disc 201, a rubber ring 202, a connecting pipe 203 and an air pressure sensor 204; the test disc 201 is fixedly provided on one side of the top of the test bench 1; the rubber ring 202 is fixedly provided inside the test disc 201; the connecting pipe 203 is fixedly provided at the top end inside the test disc 201, and the bottom end of the connecting pipe 203 is connected with the air port of the vacuum pump 102; the air pressure sensor 204 is fixedly provided inside the test disc 201; the valve core structure 3 comprises a valve core frame 301, a vertical rod 302, a valve core circular plate 303 and a sealing ring 306; the valve core frame 301 is movably arranged inside the test disc 201; the vertical rod 302 is slidably arranged inside the top side of the valve core frame 301; the valve core circular plate 303 is fixedly arranged at the bottom end of the vertical rod 302, and the valve core circular plate 303 is movably arranged inside the valve core frame 301; the sealing ring 306 is pressed into the valve core frame 301, and the sealing ring 306 is in contact with the top of the rubber ring 202; the valve core structure 3 further comprises an adjusting block 304 and an adjusting nut 305; the adjusting block 304 is movably arranged on the top outside of the vertical rod 302, a spring member is arranged between the bottom of the adjusting block 304 and the top of the valve core frame 301, and the spring member is located outside the vertical rod 302; the adjusting nut 305 is threadedly connected to the top outside of the vertical rod 302, and the bottom of the adjusting nut 305 is in contact with the top of the adjusting block 304; the specific function is that the valve core frame 301 and the test disc 201 can be pumped to negative pressure through the vacuum pump 102 and the connecting pipe 203; at the same time, the negative pressure value between the valve core frame 301 and the test disc 201 can be read by using the air pressure sensor 204 in cooperation with the air pressure display 502.

[0033] Embodiment two

[0034] As shown in the accompanying drawings Figure 1 and the accompanying drawings Figure 2 On the basis of embodiment one, the fixing device 4 comprises an electric cylinder 401, a connecting plate 402 and a fixed jaw 403; the electric cylinder 401 is fixedly arranged inside the test bench 1, and the electric cylinder 401 is located on both sides of the test disc 201, and the electric cylinder 401 and the control module 101 are electrically connected; the bottom of the connecting plate 402 is rotatably arranged outside the electric cylinder 401; one end of the fixed jaw 403 is rotatably arranged outside the telescopic end of the electric cylinder 401, the fixed jaw 403 and the connecting plate 402 are rotatably connected, and the other end of the fixed jaw 403 is in contact with the outside of the valve core frame 301; the specific function is that the valve core frame 301 can be easily and conveniently fixed inside the test disc 201 by arranging the fixing device 4.

[0035] Embodiment three

[0036] As attached Figure 5 With appendix Figure 6 As shown: Based on Embodiments 1 and 2, the clamping mechanism 5 includes: a clamping frame 501, a pressure display 502, a hydraulic cylinder 503, a pressure plate 504, a holding tray 505, a fixing rod 506, a guide plate 507, and a pressure plate 508; the clamping frame 501 is fixedly mounted on the top of the test bench 1; the pressure display 502 is fixedly mounted on the outside of the clamping frame 501, and the pressure display 502 and the pressure sensor 204 are electrically connected; the hydraulic cylinder 503 is fixedly mounted on the top of the clamping frame 501; the pressure plate 504 is fixedly mounted at the bottom of the telescopic end of the hydraulic cylinder 503; the holding tray 505 is fixedly mounted on the bottom of the clamping frame 501, and the holding tray 505 is located directly below the pressure plate 504, and holds... The valve core holder 301 can be placed inside the tray 505; the fixing rod 506 is fixedly set at the bottom of the clamping frame 501; the guide plate 507 is slidably set on the outside of the fixing rod 506, and a spring is set between the top of the guide plate 507 and the top of the fixing rod 506; the pressure plate 508 is fixedly set on the top of the guide plate 507, and the pressure plate 508 is located directly above the tray 505; its specific function is: by setting the guide plate 507, the pressure plate 508 and the spring, the sealing ring 306 can be pre-fixed on the outside of the valve core holder 301; it can prevent the sealing ring 306 from shifting during pressing; then, by using the hydraulic cylinder 503 and the pressure plate 504, the sealing ring 306 can be quickly pressed into the inside of the valve core holder 301.

[0037] The specific usage and function of this embodiment are as follows:

[0038] The utility model discloses a valve core structure 3 is placed in test tray 201 inside, makes valve core frame 301 bottom sealing ring 306 with rubber ring 202 top mutually fits, through control switch 103 and control module 101 start electric cylinder 401, and electric cylinder 401 telescopic end stretches out, makes fixed jaw 403 bottom and valve core frame 301 outside close fitting, makes valve core frame 301 fixed in test tray 201 inside, then starts vacuum pump 102, and vacuum pump 102 utilizes connecting pipe 203 and draws between valve core frame 301 and test tray 201 to negative pressure, utilizes air pressure sensor 204 cooperation air pressure display 502, can read the negative pressure value between valve core frame 301 and test tray 201, when negative pressure value is in -1.5Kpa -2Kpa case, will valve core round plate 303 suction to test tray 201 plane, judges this suction valve and valve core structure 3 negative pressure test to be eligible, if when negative pressure value is greater than -2Kpa, will valve core round plate 303 suction to test tray 201 plane, can then screw down adjusting nut 305, increases the pressure that spring gives valve core round plate 303, contrarily if when negative pressure value is less than -1.5Kpa, can then screw up adjusting nut 305, reduces the pressure that spring gives valve core round plate 303, utilizes this principle to test whether valve core structure 3 assembly is eligible, can ensure that valve core structure 3 is 100 percent eligible before assembling safety valve, reduces the safety valve rework that causes because of unqualified pressure.

Claims

1. A device for testing the performance of a poppet of a respiratory safety valve, characterized in that, Include: Test bench (1), the control module (101) is fixedly arranged outside the test bench (1), and the control switch (103) is fixedly arranged inside one side of the test bench (1), and the control module (101) is electrically connected with the control switch (103); the vacuum pump (102) is fixedly arranged at the bottom of the test bench (1); The test bench (1) is fixedly arranged on one side of the test bench (1), and the fixing device (4) is fixedly arranged inside the test bench (1); the test assembly (2) is provided with the valve core structure (3) inside, and the test bench (1) is fixedly arranged on the top; The test assembly (2) comprises: test disc (201), rubber ring (202), connecting pipe (203) and air pressure sensor (204); the test disc (201) is fixedly arranged on one side of the top of the test bench (1); the rubber ring (202) is fixedly arranged inside the test disc (201); the connecting pipe (203) is fixedly arranged at the top of the test disc (201), and the bottom of the connecting pipe (203) is connected with the air port of the vacuum pump (102); the air pressure sensor (204) is fixedly arranged inside the test disc (201).

2. The device of claim 1, wherein: The valve core structure (3) comprises: valve core frame (301), vertical rod (302), valve core round plate (303) and sealing ring (306); the valve core frame (301) is movably arranged inside the test disc (201); the vertical rod (302) is slidably arranged inside the top side of the valve core frame (301); the valve core round plate (303) is fixedly arranged at the bottom of the vertical rod (302), and the valve core round plate (303) is movably arranged inside the valve core frame (301); the sealing ring (306) is pressed into the valve core frame (301), and the sealing ring (306) is attached to the top of the rubber ring (202).

3. The device of claim 2, wherein: The valve core structure (3) further comprises: adjusting block (304) and adjusting nut (305); the adjusting block (304) is movably arranged outside the top of the vertical rod (302), and the spring piece is arranged between the bottom of the adjusting block (304) and the top of the valve core frame (301), and the spring piece is located outside the vertical rod (302); the adjusting nut (305) is arranged outside the top of the vertical rod (302) by thread connection, and the bottom of the adjusting nut (305) is attached to the top of the adjusting block (304).

4. The device of claim 2, wherein: The fixing device (4) comprises: electric cylinder (401), connecting plate (402) and fixed jaw (403); the electric cylinder (401) is fixedly arranged inside the test bench (1), and the electric cylinder (401) is located on both sides of the test disc (201), and the electric cylinder (401) and the control module (101) are electrically connected; the connecting plate (402) is rotatably arranged at the bottom of the electric cylinder (401) outside; one end of the fixed jaw (403) is rotatably arranged outside the telescopic end of the electric cylinder (401), and the fixed jaw (403) and the connecting plate (402) are rotatably connected, and the other end of the fixed jaw (403) is attached to the outside of the valve core frame (301).

5. The device of claim 2, wherein: The pressing mechanism (5) comprises a pressing frame (501), a gas pressure display (502), a hydraulic cylinder (503), a pressing disc (504) and a containing disc (505); the pressing frame (501) is fixedly arranged on the top of the test bench (1); the gas pressure display (502) is fixedly arranged on the outside of the pressing frame (501), and the gas pressure display (502) and the gas pressure sensor (204) are electrically connected; the hydraulic cylinder (503) is fixedly arranged on the top of the pressing frame (501); the pressing disc (504) is fixedly arranged on the bottom of the telescopic end of the hydraulic cylinder (503); the containing disc (505) is fixedly arranged on the bottom of the pressing frame (501), and the containing disc (505) is located directly below the pressing disc (504), and the inside of the containing disc (505) can accommodate the valve core frame (301).

6. The device of claim 5, wherein: The pressing mechanism (5) further comprises a fixing rod (506), a guide plate (507) and a pressing plate (508); the fixing rod (506) is fixedly arranged on the bottom of the pressing frame (501); the guide plate (507) is slidingly arranged on the outside of the fixing rod (506), and a spring piece is arranged between the top of the guide plate (507) and the top end of the fixing rod (506); the pressing plate (508) is fixedly arranged on the top of the guide plate (507), and the pressing plate (508) is located directly above the containing disc (505).

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