CN210834054U - Air tightness test device for through passage system - Google Patents
Air tightness test device for through passage system Download PDFInfo
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- CN210834054U CN210834054U CN201921790687.8U CN201921790687U CN210834054U CN 210834054 U CN210834054 U CN 210834054U CN 201921790687 U CN201921790687 U CN 201921790687U CN 210834054 U CN210834054 U CN 210834054U
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Abstract
The utility model relates to a run-through system air tightness test device, which comprises a pneumatic control system and an electric control test system; the pneumatic control system comprises a main gas circuit, a positive pressure testing gas circuit, a negative pressure testing gas circuit, a sensor and a tested through channel unit, wherein the pneumatic control system adopts a positive pressure gas source and a vacuum pump to realize positive pressure and negative pressure functions respectively, the sensor is connected with a gas outlet of the tested through channel unit through a hose, pressure information is collected through the sensor and fed back to the electric control testing system, the opening and closing and gas tightness test of the electromagnetic valve are executed, and functions such as process data recording, curve display, report generation and the like are realized by combining with an upper computer program. The utility model discloses the device can automize and accomplish to be surveyed the sealing performance test of through-passage under two kinds of circumstances of malleation and negative pressure, has simple structure, the function is perfect, test safe and reliable's advantage.
Description
Technical Field
The utility model relates to an air tightness detects technical field, in particular to link up system air tightness test device.
Background
In recent years, with the rapid development of the high-speed rail passenger transportation industry in China, in order to avoid adverse effects on trains caused by pressure changes, the requirement of train air tightness needs to be met, wherein a through passage is used as an important component for connecting each carriage of the train, and the through passage further needs to have good air tightness, so that the safety of the high-speed rail and the comfort of passengers are guaranteed.
At present, the common air tightness detection device for the through passage system mainly has the following defects: firstly, the tested air pressure sealing performance index is single, and the evaluation on the air tightness performance of the existing train run-through system cannot be completed; secondly, the automation operation degree of the test experiment is not high, and the reliability of air tightness data acquisition and report analysis is low; with the rapid development requirement of the air tightness of a high-speed rail, the conventional air tightness detection device is difficult to effectively complete the pressure test and the air tightness evaluation of a through passage system.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model discloses a through way system gas tightness test device can accomplish and is surveyed the sealing performance test of through way under malleation and two kinds of circumstances of negative pressure, and automatic realization pressure drop test, pressurize are experimental and fatigue detection have simple structure, the function is perfect, test safe and reliable's advantage.
In order to realize the purpose, the utility model discloses a technical scheme is:
a through passage system air tightness test device comprises a pneumatic control system and an electric control test system; the pneumatic control system includes: the main gas circuit comprises a compressed gas source, a manual slide valve, a filtering and pressure regulating valve and an electromagnetic valve unit, wherein the electromagnetic valve unit comprises a first electromagnetic pressure regulating valve, a second electromagnetic pressure regulating valve, a positive pressure electromagnetic switch valve, a vacuum electromagnetic switch valve and a safety electromagnetic switch valve, the compressed gas source is connected with the gas inlet end of the manual slide valve through a guide pipe, the gas outlet end of the manual slide valve is hermetically connected with the gas inlet end of the filtering and pressure regulating valve through pipe threads, the gas outlet end of the filtering and pressure regulating valve is connected with the gas inlet end of the electromagnetic valve unit through a guide pipe, the positive pressure testing gas circuit comprises a first electromagnetic pressure regulating valve, a second electromagnetic pressure regulating valve, a positive pressure electromagnetic switch valve and a positive pressure inflation valve, the first electromagnetic pressure regulating valve is connected with the second electromagnetic pressure regulating valve in parallel through a guide pipe, and the gas outlet ends of the first electromagnetic pressure regulating valve and the second electromagnetic pressure regulating valve are connected with the gas inlet end of, the air outlet end of the positive pressure electromagnetic switch valve is connected with a control interface of the positive pressure inflation valve through a conduit, the air outlet end of the positive pressure inflation valve is connected to the through passage unit to be tested through a hose, the negative pressure test air circuit comprises a vacuum pump, a standby vacuum pump, a vacuum electromagnetic switch valve, a negative pressure air extraction valve and a manual regulating valve, the air outlet end of the vacuum electromagnetic switch valve is connected with the control interface of the negative pressure air extraction valve through a conduit, the air inlet end of the negative pressure air extraction valve is connected to the through passage unit to be tested through a hose, the air outlet end of the negative pressure air extraction valve is connected with the air extraction end of the vacuum pump, the standby vacuum pump is connected to the through passage unit to be tested through a manual;
the electric control test system comprises an industrial personal computer, a programmable logic controller, a display, a keyboard, a mouse, a printer and an electric control cabinet, wherein the industrial personal computer and the programmable logic controller are arranged in the electric control cabinet, the display, the keyboard and the mouse are connected with the industrial personal computer through data connecting lines, an electromagnetic valve unit and a sensing device are connected to the programmable logic controller through signal transmission lines, and the programmable logic controller is connected to the industrial personal computer through a communication line.
The measured through passage unit comprises a mounting plate and a measured through passage body, the mounting plate is provided with an air outlet hole and an air inlet and outlet exchange hole, the air outlet hole is connected with the sensing device through an air duct, and the air inlet and outlet exchange hole is respectively connected with a positive pressure inflation valve, a negative pressure air extraction valve and a safety air control valve through hoses.
As a preferred technical scheme of the design, the sensing device comprises a pressure sensor and a pressure switch, and the pressure sensor and the pressure switch are connected in parallel to the air outlet through an air duct.
As a preferable technical scheme of the design, the pressure switch is a ZSE40F-01-22L-MJ type digital display pressure switch with high cost performance.
As a preferable technical scheme of the design, the pressure sensor is a high-precision JYB-KO-HAG pressure transmitter.
As a preferable technical scheme of the design, five two-position five-way valves with the models of 7V210-08-AC220V are selected as the electromagnetic valve units, and a silencer is arranged on the two-position five-way valves.
As a preferable technical scheme of the design, the positive pressure inflation valve and the negative pressure air extraction valve are VNB401A-25A type normally closed pneumatic control valves, and the safety pneumatic control valves are VNB402A-25A type normally open pneumatic control valves.
As a preferable technical scheme of the design, the model of the programmable logic controller is selected from CP1E-NA20 DR-A.
As a preferred technical scheme of the design, the main material of the measured through passage body is nonmetal soft cloth, and the rest is an aluminum alloy supporting frame, and the soft cloth is supported, so that the structural requirement of connection between carriages of the high-speed rail is met.
As a preferred technical scheme of the design, the electric control test system adopts a programmable logic controller to carry out opening and closing of the electromagnetic valve unit and air tightness tests, and combines an upper computer program to realize functions of process data recording, curve display, report generation and the like.
Compared with the prior art, the utility model, following beneficial effect has does:
1. the utility model discloses a compressed air source realizes being surveyed respectively with the vacuum pump and link up the sealing performance test of way under malleation and two kinds of circumstances of negative pressure, has the advantage that the function is perfect, test safe and reliable.
2. The utility model discloses a programmable logic controller chooses JYB type pressure sensor of high accuracy for use, ensures high pressure test precision, easy operation, degree of automation height moreover.
Drawings
FIG. 1 is a block diagram of an electronically controlled test system;
FIG. 2 is a schematic diagram of a pneumatic control system;
fig. 3 is a structural view of a through passage unit to be measured.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 to 3, a through passage system airtightness testing apparatus includes a pneumatic control system and an electric control testing system; the pneumatic control system includes: the pressure testing gas circuit comprises a first electromagnetic pressure regulating valve 4-1, a second electromagnetic pressure regulating valve 4-2, a positive pressure electromagnetic switch valve 4-3, a vacuum electromagnetic switch valve 4-4 and a safety electromagnetic switch valve 4-5, wherein the compressed gas source 1 is connected with the gas inlet end of the manual sliding valve 2 through a guide pipe, the gas outlet end of the manual sliding valve 2 is hermetically connected with the gas inlet end of the filtering and pressure regulating valve 3 through a pipe thread, the gas outlet end of the filtering and pressure regulating valve 3 is connected with the gas inlet end of the electromagnetic valve unit 4 through a guide pipe, and the positive pressure testing gas circuit comprises a first electromagnetic pressure regulating valve 4-1, a second electromagnetic pressure regulating valve 4-2, a sensing device and a tested through passage unit 12, A positive pressure electromagnetic switch valve 4-3 and a positive pressure charging valve 5, wherein a first electromagnetic pressure regulating valve 4-1 is connected with a second electromagnetic pressure regulating valve 4-2 in parallel through a conduit, the air outlet ends of the first electromagnetic pressure regulating valve 4-1 and the second electromagnetic pressure regulating valve 4-2 are connected with the air inlet end of the positive pressure charging valve 5, the air outlet end of the positive pressure electromagnetic switch valve 4-3 is connected with the control interface of the positive pressure charging valve 5 through a conduit, the air outlet end of the positive pressure charging valve 5 is connected with a through passage unit 12 to be tested through a hose 11, the negative pressure testing air path comprises a vacuum pump 7, a standby vacuum pump 14, a vacuum electromagnetic switch valve 4-4, a negative pressure air suction valve 6 and a manual regulating valve 13, the air outlet end of the vacuum electromagnetic switch valve 4-4 is connected with the control interface of the negative pressure air suction valve 6 through a conduit, the air inlet end of the negative pressure air suction, the air outlet end of the negative pressure air extraction valve 6 is connected with the air extraction end of the vacuum pump 7, the standby vacuum pump 14 is connected to the to-be-detected through passage unit 12 through a manual regulating valve 13, and the sensing device is connected to the to-be-detected through passage unit 12 through a conduit;
the electric control test system comprises an industrial personal computer, a programmable logic controller, a display, a keyboard, a mouse, a printer and an electric control cabinet, wherein the industrial personal computer and the programmable logic controller are arranged in the electric control cabinet, the display, the keyboard and the mouse are connected with the industrial personal computer through data connecting lines, the electromagnetic valve unit 4 and the sensing device are connected to the programmable logic controller through signal transmission lines, and the programmable logic controller is connected to the industrial personal computer through communication lines.
The through passage unit 12 to be tested comprises a mounting plate 12-1 and a through passage body 12-2 to be tested, wherein the through passage body 12-2 to be tested is fixed on the mounting plate 12-1, the mounting plate 12-1 is provided with an air outlet 12-3 and an air inlet and outlet exchange hole 12-4, the air outlet 12-3 is connected with the sensing device through a conduit, and the air inlet and outlet exchange hole is respectively connected with a positive pressure inflation valve 5, a negative pressure air extraction valve 6 and a safety air control valve 8 through a hose 11.
The sensing device comprises a pressure sensor 9 and a pressure switch 10, wherein the pressure sensor 9 and the pressure switch 10 are connected to the air outlet 12-3 in parallel through a guide pipe.
As a preferred technical scheme of the design, the pressure switch 10 is a ZSE40F-01-22L-MJ type digital display pressure switch with high cost performance.
As a preferable technical scheme of the design, the pressure sensor 9 is a high-precision JYB-KO-HAG pressure transmitter.
As a preferred technical solution of the present design, five two-position five-way valves with the models of 7V210-08-AC220V are selected for the electromagnetic valve unit 4, and a silencer is arranged on the two-position five-way valves.
As a preferable technical scheme of the design, the positive pressure inflation valve 5 and the negative pressure air extraction valve 6 are VNB401A-25A type normally closed pneumatic control valves, and the safety pneumatic control valve 8 is VNB402A-25A type normally open pneumatic control valves.
As a preferable technical scheme of the design, the model of the programmable logic controller is selected from CP1E-NA20 DR-A.
As a preferred technical scheme of the design, the main material of the measured through passage body 12-2 is nonmetal soft cloth, and the rest is an aluminum alloy supporting frame, and the soft cloth is supported, so that the structural requirement of connection between carriages of the high-speed rail is met.
As a preferred technical solution of the present design, the electronic control testing system adopts the above programmable logic controller to perform the opening and closing and air-tightness experiments of the electromagnetic valve unit 4, collects the gas pressure information through the pressure sensor 9, combines with the upper computer program to realize the functions of process data recording, curve display, report generation, and the like, and finally prints out the test report through the printer.
The utility model discloses can realize the gas tightness test experiment under two kinds of circumstances of malleation and negative pressure, the working pressure scope sets up when-7000 ~ 8000Pa, carries out the analysis to two kinds of circumstances:
(1) positive pressure air tightness test experiment
Setting pressure within the range of 0-8000 Pa, setting corresponding test parameters in measurement and control software, when a test is started, automatically opening a first electromagnetic pressure regulating valve 4-1, a second electromagnetic pressure regulating valve 4-2 and a positive pressure electromagnetic switch valve 4-3 by the programmable logic controller at the same time, keeping other electromagnetic valves closed, enabling a compressed air source 1 to flow through the positive pressure electromagnetic switch valve 4-3 to enter a control interface of a positive pressure inflating valve 5, enabling the positive pressure inflating valve 5 to be automatically opened, enabling the compressed air source 1 to flow through the first electromagnetic pressure regulating valve 4-1, the second electromagnetic pressure regulating valve 4-2 and then through the positive pressure inflating valve 5 to enter a to-be-tested through passage unit 12, and automatically closing the first electromagnetic pressure regulating valve 4-1, the second electromagnetic pressure regulating valve 4-2 and the positive pressure electromagnetic switch valve 4-3 when the pressure in the to-be-tested through passage body 12-2 reaches a set value, the positive pressure inflation valve 5 is automatically closed along with the positive pressure inflation valve;
(2) negative pressure air tightness test experiment
a. Setting the pressure within the range of-4000 Pa-0, setting corresponding test parameters in measurement and control software, automatically opening a vacuum pump 7 when a test is started, simultaneously and automatically opening a vacuum electromagnetic switch valve 4-4 by a programmable logic controller, keeping other electromagnetic valves closed, enabling a compressed air source 1 to enter a control interface of a negative pressure air extraction valve 6 through the vacuum electromagnetic switch valve 4-4, automatically opening the negative pressure air extraction valve 6, starting the vacuum pump 7 to extract air in a measured through passage unit 12, automatically closing the vacuum electromagnetic switch valve 4-4 by the programmable logic controller when the pressure in the measured through passage body 12-2 reaches a set value, and automatically closing the negative pressure air extraction valve 6;
b. and (3) when the set pressure is between-7000 and-4000 Pa, setting corresponding test parameters in the measurement and control software, manually opening the standby vacuum pump 14 and the manual regulating valve 13 at first, reducing the air pressure value in the through passage body 12-2 to be tested to be close to the set pressure value (about 500Pa away from the set pressure value), and repeating the step a when the test is started.
Because the safety pneumatic control valve 8 is a normally open pneumatic control valve, in the experimental process, the programmable logic controller can automatically open the safety electromagnetic switch valve 4-5, the compressed air source 1 enters the control interface of the safety pneumatic control valve 8 through the safety electromagnetic switch valve 4-5, so that the safety pneumatic control valve 8 is closed, the pressure switch 10 is responsible for displaying the air pressure in the measured through passage body 12-2 in real time, and when the air pressure in the measured through passage body 12-2 exceeds the normal range, the pressure switch 10 can be triggered to send a danger signal to the programmable logic controller, so that the safety electromagnetic switch valve 4-5 is automatically closed, at the moment, the safety pneumatic control valve 8 is in an open state, and the measured through passage body 12-2 is communicated with the atmosphere through the safety pneumatic control valve 8, so that danger is relieved. The utility model discloses degree of automation is high, the function is perfect and link up a system gas tightness test safe and reliable.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the invention without departing from the spirit and scope of the invention.
Claims (3)
1. The utility model provides a through system gas tightness test device which characterized in that: the system comprises a pneumatic control system and an electric control test system; the pneumatic control system includes: the main gas circuit comprises a compressed gas source (1), a manual slide valve (2), a filtering and pressure regulating valve (3) and an electromagnetic valve unit (4), wherein the electromagnetic valve unit (4) comprises a first electromagnetic pressure regulating valve (4-1), a second electromagnetic pressure regulating valve (4-2), a positive pressure electromagnetic switch valve (4-3), a vacuum electromagnetic switch valve (4-4) and a safety electromagnetic switch valve (4-5), the compressed gas source (1) is connected with the gas inlet end of the manual slide valve (2) through a guide pipe, the gas outlet end of the manual slide valve (2) is connected with the gas inlet end of the filtering and pressure regulating valve (3) in a sealing mode through pipe threads, the gas outlet end of the filtering and pressure regulating valve (3) is connected with the gas inlet end of the electromagnetic valve unit (4) through a guide pipe, and the positive pressure testing gas circuit comprises a first electromagnetic pressure regulating valve (4-1), A second electromagnetic pressure regulating valve (4-2), a positive pressure electromagnetic switch valve (4-3) and a positive pressure inflation valve (5), wherein the first electromagnetic pressure regulating valve (4-1) is connected with the second electromagnetic pressure regulating valve (4-2) in parallel through a conduit, the air outlet ends of the first electromagnetic pressure regulating valve (4-1) and the second electromagnetic pressure regulating valve (4-2) are connected with the air inlet end of the positive pressure inflation valve (5), the air outlet end of the positive pressure electromagnetic switch valve (4-3) is connected with the control interface of the positive pressure inflation valve (5) through a conduit, the air outlet end of the positive pressure inflation valve (5) is connected to a through passage unit (12) to be tested through a hose (11), the negative pressure testing air circuit comprises a vacuum pump (7), a standby vacuum pump (14), a vacuum electromagnetic switch valve (4-4), a negative pressure air extraction valve (6) and a manual regulating, the air outlet end of a vacuum electromagnetic switch valve (4-4) is connected with a control interface of a negative pressure air extraction valve (6) through a guide pipe, the air inlet end of the negative pressure air extraction valve (6) is connected to a to-be-detected through passage unit (12) through a hose (11), the air outlet end of the negative pressure air extraction valve (6) is connected with the air extraction end of a vacuum pump (7), a standby vacuum pump (14) is connected to the to-be-detected through passage unit (12) through a manual regulating valve (13), a sensing device comprises a pressure sensor (9) and a pressure switch (10), the sensing device is connected to the to-be-detected through passage unit (12) through a guide pipe, the to-be-detected through passage unit (12) comprises a mounting plate (12-1) and a to-be-detected through passage body (12-2), wherein the to-be-detected through passage body (12-2) is fixed on the mounting plate (12-1), and the, The air inlet and outlet exchange holes (12-4), the air outlet holes (12-3) are connected with the sensing devices through guide pipes, and the air inlet and outlet exchange holes are respectively connected with the positive pressure inflation valve (5), the negative pressure air extraction valve (6) and the safety air control valve (8) through hoses (11);
the electric control test system comprises an industrial personal computer, a programmable logic controller, a display, a keyboard, a mouse, a printer and an electric control cabinet, wherein the industrial personal computer and the programmable logic controller are arranged in the electric control cabinet, the display, the keyboard and the mouse are connected with the industrial personal computer through data connecting lines, the electromagnetic valve unit (4) and the sensing device are connected to the programmable logic controller through signal transmission lines, and the programmable logic controller is connected to the industrial personal computer through a communication line.
2. The through passage system airtightness test apparatus according to claim 1, wherein: the pressure sensor (9) and the pressure switch (10) are connected to the air outlet (12-3) in parallel through a guide pipe.
3. The through passage system airtightness test apparatus according to claim 1, wherein: and the pressure sensor (9) is a high-precision JYB type pressure transmitter.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921790687.8U CN210834054U (en) | 2019-10-23 | 2019-10-23 | Air tightness test device for through passage system |
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| CN201921790687.8U CN210834054U (en) | 2019-10-23 | 2019-10-23 | Air tightness test device for through passage system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112834130A (en) * | 2020-12-31 | 2021-05-25 | 湖北诚胜测控科技有限公司 | High pressure and vacuum circuit leakproofness testing arrangement |
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2019
- 2019-10-23 CN CN201921790687.8U patent/CN210834054U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112834130A (en) * | 2020-12-31 | 2021-05-25 | 湖北诚胜测控科技有限公司 | High pressure and vacuum circuit leakproofness testing arrangement |
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Address after: 310000 rooms 106 and 107, 1f, Yifu science and technology building, East District, China University of metrology, 258 Xueyuan street, Qiantang New District, Hangzhou, Zhejiang Patentee after: Hangzhou Qinhu Technology Co.,Ltd. Address before: Yifu science and technology building, East District, China University of metrology, 258 Xueyuan street, Hangzhou Economic and Technological Development Zone, Zhejiang Province, 310018 Patentee before: Hangzhou Qinhu Intelligent Equipment Co.,Ltd. |
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