CN211855744U - Dynamic air tightness test device - Google Patents
Dynamic air tightness test device Download PDFInfo
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- CN211855744U CN211855744U CN202020472314.2U CN202020472314U CN211855744U CN 211855744 U CN211855744 U CN 211855744U CN 202020472314 U CN202020472314 U CN 202020472314U CN 211855744 U CN211855744 U CN 211855744U
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Abstract
The utility model discloses a dynamic air tightness test device, which comprises a test box body, a pressurizing part, a pressure reducing part, a pressure collecting part and a controller; the test box body is provided with a closed inner cavity for accommodating a vehicle body to be tested; the pressurizing part is used for providing pressure gas to the inner cavity of the test box body; the pressure reducing component is used for releasing pressure gas in the inner cavity of the test box body; the pressure acquisition component is used for acquiring pressure values of the inner side and the outer side of the vehicle body to be detected; the controller is used for outputting control instructions to the control ends of the pressurizing part and the depressurizing part and determining dynamic airtightness according to the pressure value. By applying the scheme, the dynamic air tightness test in a laboratory is possible, so that the dynamic air tightness of the vehicle is determined in the vehicle design process.
Description
Technical Field
The utility model relates to a rail train's laboratory detects technical field, concretely relates to dynamic gas tightness test device.
Background
When the rail vehicle passes through the tunnel or meets in the tunnel, the pressure outside the carriage can be changed violently, the vehicle cannot be sealed effectively, and the pressure outside the carriage can be transmitted into the passenger room, so that the pressure inside the passenger room is changed. When the pressure change in the passenger compartment reaches a preset limit value, the passengers can feel uncomfortable, even nausea, vomiting and the like, so that the air tightness of the vehicle needs to be designed to reduce the severe change of the pressure in the passenger compartment.
The quality of the vehicle air tightness design needs to be verified through a static air tightness test and a dynamic air tightness test. Static air-tightness tests are generally carried out by inflating the interior of a vehicle, stopping the inflation when the pressure inside the vehicle reaches a certain desired limit, and then monitoring the progress of the pressure drop inside the vehicle. The dynamic air tightness test is to test the time-varying curve of the pressure inside and outside the vehicle through a line test and calculate the dynamic air tightness index of the vehicle according to the pressure-varying curve.
As is known, the static air-tightness test can only reflect the static pressure maintaining performance of the vehicle, and the dynamic air-tightness test can accurately reflect the real air-tightness performance of the vehicle in comparison. However, the dynamic air-tightness test needs to be performed according to the line environment and the vehicle state, and tunnels, vehicle running speeds and the like of test lines are easily limited, so that some test points cannot be tested in time. In addition, the dynamic air-tightness test of the vehicle cannot be performed until the vehicle is manufactured and the line test is not performed before the vehicle is shipped.
In view of the above, it is desirable to provide a substitute test of a dynamic air-tightness test for a vehicle design process to verify a dynamic air-tightness design effect of a vehicle.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a developments gas tightness test device for it is possible to carry out developments gas tightness test in the laboratory, with confirm vehicle developments gas tightness at vehicle design process.
The utility model provides a dynamic air tightness test device, which comprises a test box body, a pressurizing part, a pressure reducing part, a pressure collecting part and a controller; the test box body is provided with a closed inner cavity for accommodating a vehicle body to be tested; the pressurizing part is used for providing pressure gas to the inner cavity of the test box body; the pressure reducing component is used for releasing pressure gas in the inner cavity of the test box body; the pressure acquisition component is used for acquiring pressure values of the inner side and the outer side of the vehicle body to be detected; the controller is used for outputting control instructions to the control ends of the pressurizing part and the depressurizing part and determining dynamic airtightness according to the pressure value.
Preferably, the pressurizing part comprises a positive pressure air storage tank and an inflation valve, and the inflation valve is arranged on a passage between the positive pressure air storage tank and the test box body.
Preferably, the pressurizing member further comprises a first fan, and a working air port of the first fan is communicated with the positive pressure air storage tank to maintain the working pressure in the positive pressure air storage tank.
Preferably, the inflation valve and the first fan are all set to be a plurality of, and respectively follow the length direction of experimental box body is in proper order the interval arrangement.
Preferably, the decompression means includes a negative pressure gas tank and an air suction valve provided on a passage between the negative pressure gas tank and the test case.
Preferably, the pressure reducing part further comprises a second fan, and a working air port of the second fan is communicated with the negative pressure air storage tank to maintain the working pressure in the negative pressure air storage tank.
Preferably, the air suction valves and the second fans are arranged in a plurality of numbers and are sequentially arranged at intervals along the length direction of the test box body respectively.
Preferably, the pressure acquisition component comprises a plurality of pressure sensors which are respectively used for being arranged at the positions of inner and outer pressure measuring points of the vehicle body.
Aiming at the dynamic air tightness test mode of the existing vehicle, the utility model discloses a new method has proposed the dynamic air tightness test device of laboratory, specifically, adopt the test box to hold the airtight inner cavity of the automobile body that awaits measuring, pressure component and the decompression part of the internal pressure environment of test box are established in the configuration simultaneously, realize the quick increase of inner cavity pressure through controlling the pressure component, realize the quick reduction of inner cavity pressure through the decompression part, can realize that test box pressure can change along with time according to the experimental requirement from this; in the test process, the pressure change of the inner side and the outer side of the vehicle body to be tested is obtained in real time through the pressure acquisition component. By the arrangement, dynamic sealing detection of the vehicle body to be detected can be carried out in an experimental test, and therefore, the dynamic air tightness index of the vehicle is calculated according to the change curve of the pressure inside and outside the carriage along with the time, and reliable design data support is provided for judging the reasonability of the air tightness design of the vehicle.
In the preferred scheme of the utility model, the positive pressure gas storage tank and the charging valve are used for rapid pressurization, and the negative pressure gas storage tank and the air extraction valve are used for rapid decompression, the configuration is simple, the performance is reliable, and the test cost can be effectively controlled; meanwhile, the positive pressure gas storage tank, the inflation valve, the negative pressure gas storage tank and the air extraction valve are respectively arranged in a plurality of modes and are respectively arranged along the length direction of the test box body at intervals in sequence, so that on one hand, a pressurization or decompression detection environment can be quickly established, and simultaneously, the consistent pressure detection environment of each area in the test box body can be ensured to the maximum extent, so that the gas tightness detection precision is improved.
Drawings
FIG. 1 is a schematic view of a dynamic gas tightness test apparatus according to an embodiment.
In the figure:
the device comprises a test box body 1, a controller 2, a pressure sensor 3, a positive pressure air storage tank 4, an inflation valve 5, a negative pressure air storage tank 6, an air extraction valve 7, a first fan 8 and a second fan 9.
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.
Without loss of generality, the present embodiment describes in detail the specific embodiment of the dynamic gas tightness test device with the test box shown in the drawings as a description main body, and it should be understood that the specific shape and size of the test box do not substantially limit the dynamic gas tightness test device claimed in the present application.
Please refer to fig. 1, which is a schematic diagram of the dynamic air-tightness testing apparatus according to the present embodiment.
As shown in the figure, the dynamic air tightness test device adopts a test box body 1 to establish a test environment. Here, the test box 1 has a sealed inner cavity for accommodating a vehicle body (not shown in the figure) to be tested, and it can be understood that, based on the function, the door body and the box of the test box 1 should have a relative sealing relationship in addition to being capable of being opened and closed relatively. Of course, the opening and closing adapting structure between the door body and the box body can be realized in different manners, such as but not limited to, sliding opening and closing or side pulling opening and closing.
In the scheme, the test box body 1 provides pressure gas through the pressurizing part so as to realize rapid pressurization of the inner cavity; the pressure gas in the inner cavity is released through the pressure reducing component so as to realize the rapid pressure reduction of the test box body 1. Specifically, control commands are output to the control ends of the pressurizing part and the depressurizing part through the controller 2, so that the pressure environment outside the railway vehicle during running is simulated.
Wherein, arrange pressure acquisition part 3 respectively in the automobile body inboard that awaits measuring and the outside to the pressure value of the automobile body inboard that awaits measuring and the outside that obtains in real time at the experimentation. On this basis, the controller 2 may further determine the dynamic airtightness according to the pressure value acquired in real time. In the rapid pressurization and rapid decompression processes, the pressure inside and outside the vehicle body to be detected changes at any time, the internal and external pressure values monitored by the pressure acquisition component change, specifically, the dynamic air tightness index of the vehicle is determined by calculation based on the change curve, and then the dynamic air tightness of the vehicle body to be detected is judged. It is understood that the determination of the dynamic airtightness index can be implemented by using the prior art, but is not at the core invention point of the present application, and therefore, the detailed description thereof is omitted.
The pressure acquisition component preferably adopts a pressure sensor 3, and the pressure sensors 3 are respectively arranged at the positions of pressure measuring points inside and outside the vehicle body. It should be understood that the configuration positions and the number of the pressure measuring points are determined according to the specific detection strategies of different vehicle types so as to meet the functional requirement of calculating the dynamic air tightness index of the vehicle.
It should be noted that different configurations for the pressurizing member and the depressurizing member can be implemented, and it is within the scope of the claimed application as long as the functional requirements of rapid depressurization for rapid pressurization are satisfied. For example, and not by way of limitation, the particular arrangements shown in the figures.
As further shown in fig. 1, it is preferable to perform rapid pressurization using a positive pressure gas tank 4 and an inflation valve 5, and rapid depressurization using a negative pressure gas tank 6 and an air suction valve 7. Wherein, the inflation valve 5 sets up on the route between malleation gas holder 4 and experimental box 1, and the opening state of the steerable inflation valve 5 of controller 2 to utilize inflation valve 5 to adjust the conducting state of malleation gas holder 4 and experimental box 1, realize quick pressure boost function. Wherein, bleeder valve 7 sets up on the route between negative pressure gas holder 6 and experimental box 1, and the open mode of the steerable bleeder valve 7 of controller 2 to utilize bleeder valve 7 to adjust the on-state of negative pressure gas holder 6 and experimental box 1, realize the quick decompression function.
The inflation valve 5 and the suction valve 7 may be matched with standard components, and the specific structural implementation manner is not the core invention point of the present application, and therefore, the detailed description is omitted here. Preferably, the inflation valves 5 and the air extraction valves 7 are respectively provided in a plurality and are respectively arranged along the length direction of the test box body 1 at intervals in sequence, so that a pressurization or decompression detection environment can be quickly established, and meanwhile, the consistent pressure detection environment of each area in the test box body 1 can be ensured to the maximum extent.
In order to maintain the test operation for a long time, it is preferable to maintain the operating pressures of the positive pressure air tank 4 and the negative pressure air tank 6 by using the fans, respectively. As shown in the figure, the working air port of the first fan 8 is communicated with the positive pressure air storage tank 4 to maintain the working pressure in the positive pressure air storage tank 4; the working air port of the second fan 9 is communicated with the negative pressure air storage tank 6 to maintain the working pressure in the negative pressure air storage tank 6.
In addition, the first fan 8 and the second fan 9 can be respectively provided in a plurality of numbers and are respectively arranged along the length direction of the test box body 1 at intervals in sequence so as to quickly and evenly establish the working pressure of the corresponding gas storage tank.
The following briefly describes the experimental procedure for dynamic airtightness testing using the apparatus of this example:
(1) conveying a vehicle to be tested into a test box body 1, and arranging pressure sensors inside a carriage and outside a vehicle body;
(2) sealing the through passages at two ends of the vehicle to be tested;
(3) sealing the test box body 1;
(4) controlling the air inflow and the air extraction of the test box body 1 and the required time by using a control program according to the environmental pressure change requirement required by the dynamic air tightness test;
(5) starting pressure acquisition;
(6) starting a pressure control program of the test box body 1, and starting a dynamic air tightness test of rapid pressurization and rapid decompression;
(7) and the pressure application of the test box body 1 is finished, and the test is finished.
It should be noted that the above-mentioned examples provided by the present embodiment are not limited to the number of components and the specific positions shown in the figures, for example, the inflation valve 5, the suction valve 7, the first fan 8 and the second fan 9 may be set according to specific operating parameters; for another example, the shape of the end of the test case 1 is not limited to that shown in the drawings. It should be understood that the application of the scheme can also perform dynamic air tightness tests on key large components such as air conditioners, windows, doors, through passages and the like, and can also perform dynamic air tightness tests on other test objects such as automobiles and the like, as long as equivalent changes according to the core concept of the application are within the protection scope of the application.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements should also be considered as the protection scope of the present invention.
Claims (8)
1. A dynamic air tightness test device is characterized by comprising;
the test box body is provided with a closed inner cavity body for accommodating the vehicle body to be tested;
the pressurizing part is used for providing pressure gas to the inner cavity of the test box body;
the pressure reducing component is used for releasing pressure gas in the inner cavity of the test box body;
the pressure acquisition component is used for acquiring pressure values of the inner side and the outer side of the vehicle body to be detected; and
and the controller is used for outputting control instructions to the control ends of the pressurizing part and the depressurizing part and determining dynamic airtightness according to the pressure value.
2. The dynamic gas-tight test apparatus according to claim 1, wherein said pressurizing member comprises a positive pressure gas tank and an inflation valve, said inflation valve being provided on a passage between said positive pressure gas tank and said test case.
3. The dynamic air-tightness testing device according to claim 2, wherein said pressurizing member further comprises a first blower having a working air port communicating with said positive pressure air tank for maintaining the working pressure in said positive pressure air tank.
4. The dynamic air-tightness test device according to claim 3, wherein the inflation valve and the first fan are provided in plurality and are respectively arranged along the length direction of the test box body at intervals in sequence.
5. The dynamic gas-tightness test device according to claim 1, wherein the decompression means includes a negative pressure gas tank and a suction valve provided on a passage between the negative pressure gas tank and the test box body.
6. The dynamic air-tightness testing device according to claim 5, wherein said pressure reducing member further comprises a second fan having a working air port communicating with said negative pressure air tank for maintaining the working pressure in said negative pressure air tank.
7. The dynamic air-tightness test device according to claim 6, wherein the air extraction valve and the second fan are provided in plurality and are respectively arranged at intervals along the length direction of the test box body.
8. The dynamic gas tightness test device according to claim 7, wherein the pressure collecting member comprises a plurality of pressure sensors for being arranged at inner and outer pressure measuring point positions of the vehicle body, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020472314.2U CN211855744U (en) | 2020-04-02 | 2020-04-02 | Dynamic air tightness test device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020472314.2U CN211855744U (en) | 2020-04-02 | 2020-04-02 | Dynamic air tightness test device |
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| CN211855744U true CN211855744U (en) | 2020-11-03 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112729725A (en) * | 2021-01-08 | 2021-04-30 | 中车青岛四方机车车辆股份有限公司 | Vehicle dynamic sealing index determination method, device, medium, equipment and vehicle |
| CN112765814A (en) * | 2021-01-20 | 2021-05-07 | 中车唐山机车车辆有限公司 | Airtight performance maintaining design method based on full life cycle |
| CN113295350A (en) * | 2021-05-28 | 2021-08-24 | 中南大学 | System for obtaining dynamic air tightness index of train model and method, device and equipment for obtaining dynamic air tightness index of train |
| CN114323453A (en) * | 2021-12-29 | 2022-04-12 | 武汉泰格尔科技发展有限公司 | Negative pressure test device in cabin and operation method thereof |
| CN116558736A (en) * | 2023-07-06 | 2023-08-08 | 苏州宇薄新能源科技有限公司 | Tightness detection method and system based on negative pressure |
-
2020
- 2020-04-02 CN CN202020472314.2U patent/CN211855744U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112729725A (en) * | 2021-01-08 | 2021-04-30 | 中车青岛四方机车车辆股份有限公司 | Vehicle dynamic sealing index determination method, device, medium, equipment and vehicle |
| CN112765814A (en) * | 2021-01-20 | 2021-05-07 | 中车唐山机车车辆有限公司 | Airtight performance maintaining design method based on full life cycle |
| CN113295350A (en) * | 2021-05-28 | 2021-08-24 | 中南大学 | System for obtaining dynamic air tightness index of train model and method, device and equipment for obtaining dynamic air tightness index of train |
| CN113295350B (en) * | 2021-05-28 | 2022-09-16 | 中南大学 | System for obtaining dynamic air tightness index of train model and method, device and equipment for obtaining dynamic air tightness index of train |
| CN114323453A (en) * | 2021-12-29 | 2022-04-12 | 武汉泰格尔科技发展有限公司 | Negative pressure test device in cabin and operation method thereof |
| CN116558736A (en) * | 2023-07-06 | 2023-08-08 | 苏州宇薄新能源科技有限公司 | Tightness detection method and system based on negative pressure |
| CN116558736B (en) * | 2023-07-06 | 2023-09-19 | 苏州宇薄新能源科技有限公司 | Tightness detection method and system based on negative pressure |
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