A top shutter cylinder air tightness test system

Abstract

A top shutter cylinder air tightness test system relates to the field of cylinder production and processing, including a high-pressure gas source, the high-pressure gas source is connected to a first pressure regulating valve and a second pressure regulating valve, the first pressure regulating valve and the second pressure regulating valve are respectively connected to a first two-position three-way solenoid valve and a second two-position three-way solenoid valve, the first two-position three-way solenoid valve and the second two-position three-way solenoid valve are respectively connected to a first check valve and a second check valve, the first check valve and the second check valve are connected to a third three-way joint, the other two joints of the third three-way joint are respectively connected to the air inlet ends of the third two-position three-way solenoid valve and the fourth two-position three-way solenoid valve, and the working ends of the third two-position three-way solenoid valve and the fourth two-position three-way solenoid valve are respectively connected to the fourth three-way joint and the fifth three-way joint. The present invention can solve the problem that the detection process of the top shutter cylinder air tightness detection in the prior art is very cumbersome and the efficiency is very low.

Description

Technical Field

[0001] The invention relates to the field of cylinder production and processing, in particular to an air tightness testing system for a top shutter cylinder. Background Art

[0002] The top shutter cylinder 8 is a special cylinder for trains. The production requirements of the top shutter cylinder are relatively high, and it needs to be corrosion-resistant and pressure-resistant, high and low temperature resistant, uniform in speed, and good in buffering. The piston of the top shutter cylinder 8 divides its inner cavity into a cavity A 81 facing one end of the piston rod and a cavity B 82 away from one end of the piston rod. Both the cavity A 81 and the cavity B 82 are provided with air ports connected to an external air source. At present, the air tightness test of the cavity A 81 and the cavity B 82 adopts the bubble test method, which not only tests the air tightness of the cavity A and the cavity B at low pressure, but also tests the air tightness of the cavity A and the cavity B at high pressure. When using the bubble test method for testing, each test requires manually unplugging the test pipeline and recombining the pipeline with the pneumatic detection device to form a new test air path. The detection process is very cumbersome and the efficiency is very low. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a top shutter cylinder air tightness testing system to solve the problem that the detection process of the top shutter cylinder air tightness detection in the prior art is very cumbersome and the efficiency is very low.

[0004] The technical solution adopted by the present invention to solve its technical problem is: a top shutter cylinder air tightness testing system, including a high-pressure air source, the air outlet end of the high-pressure air source is connected to the air inlet end of the first pressure regulating valve and the second pressure regulating valve through a first three-way joint, the air outlet ends of the first pressure regulating valve and the second pressure regulating valve are respectively connected to the air inlet end of the first two-position three-way solenoid valve and the second two-position three-way solenoid valve, the working ends of the first two-position three-way solenoid valve and the second two-position three-way solenoid valve are respectively connected to the air inlet end of the first check valve and the second check valve, the air outlet ends of the first check valve and the second check valve are connected to the third three-way joint through the second three-way joint, the other two joints of the third three-way joint are respectively connected to the air inlet end of the third two-position three-way solenoid valve and the fourth two-position three-way solenoid valve, the working ends of the third two-position three-way solenoid valve and the fourth two-position three-way solenoid valve are respectively connected to the fourth three-way joint and the fifth three-way joint, and the other two joints of the fourth three-way joint are respectively connected to the air inlet end of the first solenoid valve and the fourth check valve The air outlet end of the first solenoid valve is connected, the air outlet end of the first solenoid valve and the air inlet end of the fourth one-way valve are respectively connected to the air inlet end of the third one-way valve and the air inlet end of the second solenoid valve, the air outlet end of the third one-way valve and the air outlet end of the second solenoid valve are both connected to the sixth three-way joint, the other two joints of the fifth three-way joint are respectively connected to the air outlet end of the fifth one-way valve and the air inlet end of the fourth solenoid valve, the air inlet end of the fifth one-way valve and the air outlet end of the fourth solenoid valve are respectively connected to the air inlet end of the third solenoid valve and the air inlet end of the sixth one-way valve, the air outlet end of the third solenoid valve and the air outlet end of the sixth one-way valve are both connected to the seventh three-way joint, the sixth three-way joint and the other joint of the seventh three-way joint are respectively connected to the eighth three-way joint and the ninth three-way joint, the other two joints of the eighth three-way joint are respectively connected to one of the air inlet ends of the shuttle valve and the air port of cavity A, the other two joints of the ninth three-way joint are respectively connected to the other air inlet end of the shuttle valve and the air port of cavity B, and the working end of the shuttle valve is connected to the digital pressure sensor.

[0005] Furthermore, the high-pressure gas source is a gas storage tank.

[0006] Further, the test system also includes a body, on which a low pressure test button, a high pressure test button, an A cavity pressure check button, an A cavity pressure relief button, a B cavity pressure check button and a B cavity pressure relief button are arranged, the PA channel conduction switch of the second two-position three-way solenoid valve is electrically connected to the low pressure test button through a contactor, the PA channel conduction switch of the first two-position three-way solenoid valve is electrically connected to the high pressure test button through a contactor, the PA channel conduction switch of the third two-position three-way solenoid valve and the conduction switch of the first solenoid valve are electrically connected to the A cavity pressure check button through a contactor, the AO channel conduction switch of the third two-position three-way solenoid valve and the conduction switch of the second solenoid valve are electrically connected to the A cavity pressure relief button through a contactor, the PA channel conduction switch of the fourth two-position three-way solenoid valve and the conduction switch of the fourth solenoid valve are electrically connected to the B cavity pressure check button through a contactor, and the AO channel conduction switch of the fourth two-position three-way solenoid valve and the conduction switch of the third solenoid valve are electrically connected to the B cavity pressure relief button through a contactor.

[0007] Furthermore, the machine body also includes a work surface, and a top shutter cylinder fixing device is arranged on the work surface.

[0008] Furthermore, the top shutter cylinder fixing device comprises a fixing plate, and the fixing plate is detachably connected to the top shutter cylinder via bolts.

[0009] The present invention has the following beneficial effects:

[0010] The present invention redesigns and optimizes the combination of the detection pipeline and the pneumatic detection device of the test system of the top shutter cylinder. When testing the air tightness of the top shutter cylinder, it is not necessary to unplug the detection pipeline and recombining the pipeline with the pneumatic detection device to form a new detection air path after each test. It is only necessary to adjust the working state of each pneumatic detection device by buttons to complete the next test. Through the top shutter cylinder air tightness test system of the present invention, the test personnel can automatically switch the high and low pressure test items and quickly complete the air tightness test of the A cavity and the B cavity. The test process is very simple and the test efficiency is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the pneumatic principle structure of the present invention;

[0012] Figure 2 This is the front view of the body. DETAILED DESCRIPTION

[0013] Embodiment 1:

[0014] like Figure 1 and 2As shown, a top shutter cylinder air tightness test system includes a high-pressure gas source 1, the gas outlet end of the high-pressure gas source 1 is connected to the gas inlet end of the first pressure regulating valve 21 and the second pressure regulating valve 22 through a first three-way joint 61, the gas outlet ends of the first pressure regulating valve 21 and the second pressure regulating valve 22 are respectively connected to the gas inlet ends of the first two-position three-way solenoid valve 31 and the second two-position three-way solenoid valve 32, the working ends of the first two-position three-way solenoid valve 31 and the second two-position three-way solenoid valve 32 are respectively connected to the gas inlet ends of the first check valve 41 and the second check valve 42, the first check valve 41 The outlet end of the second one-way valve 42 is connected to the third three-way joint 63 through the second three-way joint 62, the other two joints of the third three-way joint 63 are respectively connected to the inlet ends of the third two-position three-way solenoid valve 33 and the fourth two-position three-way solenoid valve 34, the working ends of the third two-position three-way solenoid valve 33 and the fourth two-position three-way solenoid valve 34 are respectively connected to the fourth three-way joint 64 and the fifth three-way joint 65, the other two joints of the fourth three-way joint 64 are respectively connected to the inlet end of the first solenoid valve 51 and the outlet end of the fourth one-way valve 44, the first solenoid valve The air outlet end of the fourth one-way valve 41 and the air inlet end of the fourth one-way valve 44 are connected to the air inlet end of the third one-way valve 43 and the air inlet end of the second solenoid valve 52 respectively, the air outlet end of the third one-way valve 43 and the air outlet end of the second solenoid valve 52 are both connected to the sixth three-way connector 66, the other two connectors of the fifth three-way connector 65 are connected to the air outlet end of the fifth one-way valve 45 and the air inlet end of the fourth solenoid valve 54 respectively, the air inlet end of the fifth one-way valve 45 and the air outlet end of the fourth solenoid valve 54 are connected to the air inlet end of the third solenoid valve 53 and the air inlet end of the sixth one-way valve 46 respectively, the air outlet end of the fifth one-way valve 45 and the air inlet end of the fourth solenoid valve 54 are connected to the air inlet end of the third solenoid valve 53 and the air inlet end of the sixth one-way valve 46 respectively, The outlet end of the third solenoid valve 53 and the outlet end of the sixth one-way valve 46 are both connected to the seventh three-way connector 67, the other connectors of the sixth three-way connector 66 and the seventh three-way connector 67 are respectively connected to the eighth three-way connector 68 and the ninth three-way connector 69, the other two connectors of the eighth three-way connector 68 are respectively connected to one of the air inlet ends of the shuttle valve 71 and the air port of the A chamber 81, the other two connectors of the ninth three-way connector 69 are respectively connected to the other air inlet end of the shuttle valve 71 and the air port of the B chamber 82, and the working end of the shuttle valve 71 is connected to the digital pressure sensor 72.

[0015] The present invention redesigns and optimizes the combination of the detection pipeline and the pneumatic detection device of the test system of the top shutter cylinder. When testing the air tightness of the top shutter cylinder, it is not necessary to unplug the detection pipeline and recombining the pipeline with the pneumatic detection device to form a new detection air path after each test. It is only necessary to adjust the working state of each pneumatic detection device by buttons to complete the next test. Through the top shutter cylinder air tightness test system of the present invention, the test personnel can automatically switch the high and low pressure test items and quickly complete the air tightness test of the A cavity and the B cavity. The test process is very simple and the test efficiency is greatly improved.

[0016] The high-pressure gas source 1 is a gas storage tank.

[0017] The test system also includes a body 9, on which a low-pressure test button 91, a high-pressure test button 92, an A-cavity pressure check button 93, an A-cavity pressure relief button 94, a B-cavity pressure check button 95 and a B-cavity pressure relief button 96 are arranged. The PA channel conduction switch of the second two-position three-way solenoid valve 32 is electrically connected to the low-pressure test button 91 through a contactor, the PA channel conduction switch of the first two-position three-way solenoid valve 31 is electrically connected to the high-pressure test button 92 through a contactor, and the PA channel conduction switch of the third two-position three-way solenoid valve 33 is electrically connected to the conduction switch of the first solenoid valve 51. The switch is electrically connected to the A cavity pressure detection button 93 through a contactor, the AO channel conduction switch of the third two-position three-way solenoid valve 33 and the conduction switch of the second solenoid valve 52 are electrically connected to the A cavity pressure relief button 94 through a contactor, the PA channel conduction switch of the fourth two-position three-way solenoid valve 34 and the conduction switch of the fourth solenoid valve 54 are electrically connected to the B cavity pressure detection button 95 through a contactor, the AO channel conduction switch of the fourth two-position three-way solenoid valve 34 and the conduction switch of the third solenoid valve 53 are electrically connected to the B cavity pressure relief button 96 through a contactor.

[0018] The machine body 9 further comprises a work surface 97 , on which a top shutter cylinder fixing device 971 is arranged.

[0019] The top shutter cylinder fixing device 971 includes a fixing plate 9711 , and the fixing plate 9711 is detachably connected to the top shutter cylinder 8 via bolts 9712 .

[0020] When using the present invention to test the air tightness of the top shutter cylinder, the following steps are followed:

[0021] 1. Fix the top shutter cylinder on the top shutter cylinder fixing device 971, connect all the air tightness detection pipelines and pneumatic detection devices, set the pressure values ​​of the second pressure regulating valve and the first pressure regulating valve to 0.2Mpa and 1.04Mpa respectively, so that the first pressure regulating valve is used to measure the air tightness of the top shutter cylinder under low pressure state, and the second pressure regulating valve is used to measure the air tightness of the top shutter cylinder under high pressure state.

[0022] 2. Press the low-pressure test button 91 and the A-cavity pressure detection button 93 in sequence, the PA channel of the second two-position three-way solenoid valve 32 is turned on, the PA channel of the third two-position three-way solenoid valve 33 is turned on, and the first solenoid valve 51 is turned on. The gas in the gas storage tank enters the shuttle valve 71, the digital pressure sensor 72 and the A-cavity 81 through the first three-way connector 61, the second pressure regulating valve 22, the second two-position three-way solenoid valve 32, the second one-way valve 42, the second three-way connector 62, the third three-way connector 63, the third two-position three-way solenoid valve 33, the fourth three-way connector 64, the first solenoid valve 51, the third one-way valve 43, the sixth three-way connector 66 and the eighth three-way connector 68 at the same time. At this time, the A-cavity 81 is in a low-pressure detection state, and the high-pressure circuit is blocked due to the reverse cut-off effect of the first one-way valve 41.

[0023] 3. Close the A cavity pressure detection button 93, close the PA channel of the third two-position three-way solenoid valve 33, close the first solenoid valve 51, and the gas in the A cavity 81 cannot reverse through the third one-way valve 43 and is in a pressure-maintaining state. At this time, the A cavity 81 is only connected to the shuttle valve 71 and the digital pressure sensor 72. The air pressure value in the A cavity 81 is read through the digital pressure sensor 72. If the air pressure value in the A cavity 81 gradually decreases, there is a leakage in the A cavity 81 under low pressure conditions. If the air pressure value in the A cavity 81 remains unchanged, the A cavity 81 has good air tightness under low pressure conditions.

[0024] 4. Press the A cavity pressure relief button 94, the AO channel of the third two-position three-way solenoid valve 33 is turned on, the second solenoid valve 52 is turned on, and the gas in the A cavity 81 enters the third two-position three-way solenoid valve 33 through the eighth three-way connector 68, the sixth three-way connector 66, the second solenoid valve 52, the fourth one-way valve 44, and the fourth three-way connector 64 and is discharged from the O port of the third two-position three-way solenoid valve 33 through the AO channel of the third two-position three-way solenoid valve 33, and the A cavity 81 is depressurized.

[0025] 5. Press the B cavity pressure detection button 95, the PA channel of the fourth two-position three-way solenoid valve 34 is turned on, the fourth solenoid valve 54 is turned on, and the gas in the gas storage tank enters the shuttle valve 71, the digital pressure sensor 72 and the B cavity 82 through the first three-way connector 61, the second pressure regulating valve 22, the second two-position three-way solenoid valve 32, the second one-way valve 42, the second three-way connector 62, the third three-way connector 63, the fourth two-position three-way solenoid valve 34, the fifth three-way connector 65, the fourth solenoid valve 54, the sixth one-way valve 46, the seventh three-way connector 67, and the ninth three-way connector 69 at the same time. At this time, the B cavity 82 is in a low-pressure detection state, and the high-pressure circuit is blocked due to the reverse cut-off effect of the first one-way valve 41.

[0026] 6. Close the B cavity pressure detection button 95, close the PA channel of the fourth two-position three-way solenoid valve 34, close the fourth solenoid valve 54, and the gas in the B cavity 82 cannot reversely pass through the sixth one-way valve 46 and is in a pressure-maintaining state. At this time, the B cavity 82 is only connected to the shuttle valve 71 and the digital pressure sensor 72. The air pressure value in the B cavity 82 is read through the digital pressure sensor 72. If the air pressure value in the B cavity 82 gradually decreases, there is a leakage in the B cavity 82 under low pressure conditions. If the air pressure value in the B cavity 82 remains unchanged, the B cavity 82 has good air tightness under low pressure conditions.

[0027] 7. Press the B chamber pressure relief button 96, the AO channel of the fourth two-position three-way solenoid valve 34 is turned on, and the third solenoid valve 53 is turned on. The gas in the B chamber 82 enters the fourth two-position three-way solenoid valve 34 through the ninth three-way connector 69, the seventh three-way connector 67, the third solenoid valve 53, the fifth one-way valve 45, and the fifth three-way connector 65, and is discharged from the O port of the fourth two-position three-way solenoid valve 34 through the AO channel of the fourth two-position three-way solenoid valve 34, and the B chamber 82 is depressurized.

[0028] 8. Turn off the low-pressure test button 91, and the PA channel of the second two-position three-way solenoid valve 32 is closed.

[0029] 9. Press the high-voltage test button 92, and the PA channel of the first two-position three-way solenoid valve 31 is turned on.

[0030] 10. The other procedures for the air tightness test of the top shutter cylinder under high pressure are the same as those for the air tightness test under low pressure.

[0031] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any technician familiar with the profession can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent replacement and improvement of the above embodiments made according to the technical essence of the present invention, within the spirit and principles of the present invention, without departing from the content of the technical solution of the present invention, still fall within the protection scope of the technical solution of the present invention.

Claims

1. A top shutter cylinder air tightness test system, characterized in that: The invention comprises a high-pressure gas source (1), wherein the gas outlet end of the high-pressure gas source (1) is connected to the gas inlet ends of a first pressure regulating valve (21) and a second pressure regulating valve (22) through a first three-way joint (61), the gas outlet ends of the first pressure regulating valve (21) and the second pressure regulating valve (22) are respectively connected to the gas inlet ends of a first two-position three-way solenoid valve (31) and a second two-position three-way solenoid valve (32), the working ends of the first two-position three-way solenoid valve (31) and the second two-position three-way solenoid valve (32) are respectively connected to the gas inlet ends of a first one-way valve (41) and a second one-way valve (42), the gas outlet ends of the first one-way valve (41) and the second one-way valve (42) are connected to a third three-way joint (63) through a second three-way joint (62), and the other end of the third three-way joint (63) is connected to the gas outlet end of the first one-way valve (41) and the second one-way valve (42). The two outer joints are respectively connected to the air inlet ends of the third two-position three-way solenoid valve (33) and the fourth two-position three-way solenoid valve (34); the working ends of the third two-position three-way solenoid valve (33) and the fourth two-position three-way solenoid valve (34) are respectively connected to the fourth three-way joint (64) and the fifth three-way joint (65); the other two joints of the fourth three-way joint (64) are respectively connected to the air inlet end of the first solenoid valve (51) and the air outlet end of the fourth one-way valve (44); the air outlet end of the first solenoid valve (51) and the air inlet end of the fourth one-way valve (44) are respectively connected to the air inlet end of the third one-way valve (43) and the air inlet end of the second solenoid valve (52); the air outlet end of the third one-way valve (43) and the air outlet end of the second solenoid valve (52) are both connected to the sixth one-way joint (64); The third and the sixth three-way connector (66) are connected to the third and the sixth three-way connector (67). The other two connectors of the fifth three-way connector (65) are connected to the outlet end of the fifth one-way valve (45) and the inlet end of the fourth solenoid valve (54) respectively. The inlet end of the fifth one-way valve (45) and the outlet end of the fourth solenoid valve (54) are connected to the inlet end of the third solenoid valve (53) and the inlet end of the sixth one-way valve (46) respectively. The outlet end of the third solenoid valve (53) and the outlet end of the sixth one-way valve (46) are both connected to the seventh three-way connector (67). The other connectors of the sixth three-way connector (66) and the seventh three-way connector (67) are connected to the eighth three-way connector (68) and the ninth three-way connector (69) respectively. The other two connectors of the eighth three-way connector (68) are connected to the shuttle valve ( The test system comprises a first air inlet end (124) and a second air inlet end (125) of the shuttle valve (71) connected to one of the air inlets of the shuttle valve (71) and the air port of the A chamber (81), the other two joints of the ninth three-way joint (69) are respectively connected to the other air inlet end of the shuttle valve (71) and the air port of the B chamber (82), the working end of the shuttle valve (71) is connected to the digital pressure sensor (72), the high-pressure air source (1) is a gas storage tank, the test system further comprises a body (9), the body (9) is provided with a low-pressure test button (91), a high-pressure test button (92), an A chamber pressure detection button (93), an A chamber pressure relief button (94), a B chamber pressure detection button (95) and a B chamber pressure relief button (96), the PA channel conduction switch of the second two-position three-way solenoid valve (32) is electrically connected to the low-pressure test button (91) via a contactor,The PA channel conduction switch of the first two-position three-way solenoid valve (31) is electrically connected to the high-voltage test button (92) through a contactor; the PA channel conduction switch of the third two-position three-way solenoid valve (33) and the conduction switch of the first solenoid valve (51) are electrically connected to the A chamber pressure detection button (93) through a contactor; the AO channel conduction switch of the third two-position three-way solenoid valve (33) and the conduction switch of the second solenoid valve (52) are electrically connected to the A chamber pressure relief button (94) through a contactor; the PA channel conduction switch of the fourth two-position three-way solenoid valve (34) and the conduction switch of the fourth solenoid valve (54) are electrically connected to the B chamber pressure detection button (95) through a contactor; and the AO channel conduction switch of the fourth two-position three-way solenoid valve (34) and the conduction switch of the third solenoid valve (53) are electrically connected to the B chamber pressure relief button (96) through a contactor.

2. A top shutter cylinder air tightness test system as claimed in claim 1, characterized in that: The machine body (9) further comprises a work surface (97), on which a top shutter cylinder fixing device (971) is arranged.

3. A top shutter cylinder air tightness test system as claimed in claim 2, characterized in that: The top shutter cylinder fixing device (971) comprises a fixing plate (9711), and the fixing plate (9711) is detachably connected to the top shutter cylinder (8) via bolts (9712).

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