CN114216631B - High-low temperature air tightness test system for automobile brake hose - Google Patents
High-low temperature air tightness test system for automobile brake hose Download PDFInfo
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- CN114216631B CN114216631B CN202110035692.3A CN202110035692A CN114216631B CN 114216631 B CN114216631 B CN 114216631B CN 202110035692 A CN202110035692 A CN 202110035692A CN 114216631 B CN114216631 B CN 114216631B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/32—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators
- G01M3/34—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators by testing the possibility of maintaining the vacuum in containers, e.g. in can-testing machines
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- General Physics & Mathematics (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
A high-low temperature air tightness test system for an automobile brake hose comprises an automobile brake hose high-low temperature air tightness test device and a brake hose; the high-low temperature air tightness test device for the automobile brake hose comprises a connecting pipe, a high-low pressure control device, a temperature control device, an electric control module and a time control module; the first end of the connecting pipe is communicated with the air source, the second end of the connecting pipe is provided with more than one port, and each port is provided with a stop valve and a pressure sensor; the high-low pressure control system comprises a pneumatic three element, a residual pressure release valve, a booster pump, an air storage tank, a high-pressure air pipe, a low-pressure air pipe, a shuttle valve and a quick exhaust valve which are communicated in sequence on a connecting pipe; the temperature control device comprises a high-low temperature test bed and a temperature control module, and a temperature sensor is arranged in the high-low temperature test bed; the electric control module comprises a control panel and a controller, an editing module is arranged in the control panel, and the control panel is communicated with the controller through a signal line; accurate test data and good test repeatability.
Description
Technical Field
The invention relates to a quality detection technology of special parts for an automobile, in particular to a high-low temperature air tightness test system of an automobile brake hose.
Technical Field
Good air tightness is required for various brake pipes on various motor vehicles, such as a hydraulic brake pipe or a pneumatic brake pipe. In the prior art, a test bed is provided, which includes a host and a slave, wherein the host and the slave are provided with at least one pair of fixed supports for fixing brake pipes and at least one pair of sealing devices for plugging the orifices of the brake pipes, and the sealing devices are provided with air charging devices connected with pressure detection devices. During the test, only need to install the brake pipe on fixed bolster fixed, for programmable controller input control signal again, programmable controller blocks up the brake pipe mouth of pipe with regard to steerable sealing device, because fill the wind device and set up on sealing device, can fill the wind for the brake pipe this moment, fill the wind and finish, because sealing device blocks up the brake pipe mouth of pipe, realize the pressurize, then reuse pressure detection device to detect the pressure value, and through two or more pressure values that obtain, programmable controller judges out the brake pipe gas tightness automatically. The test bed is simple in function, only after the brake pipe is inflated, the opening of the brake pipe is blocked by the sealing device, pressure maintaining is achieved, then the pressure detection device is used for detecting pressure values, and the programmable controller automatically judges the air tightness of the brake pipe through the obtained two or more pressure values. The test working condition of the brake pipe air tightness test bed is simple, and only the air tightness of the brake pipe after stamping can be tested.
However, the Chinese industry standard QC/T1113-2019 technical requirements and test method of a quick connector for an automobile air brake system standardizes the test procedure of the automobile brake hose, designs more complicated working conditions for the air tightness test of the automobile brake hose, and the existing test platform cannot meet the requirements.
Technical scheme
The invention aims to solve the defects of the prior art, and provides the high-low temperature air tightness test device for the automobile brake hose, which has the advantages of simple structure, convenience in operation, accurate test data and good test repeatability.
A high-low temperature air tightness test system for an automobile brake hose comprises an automobile brake hose high-low temperature air tightness test device and a brake hose;
the high-low temperature air tightness test device for the automobile brake hose comprises a connecting pipe, a high-low pressure control device, a temperature control device, an electric control module and a time control module;
the first end of the connecting pipe is communicated with an air source, the second end of the connecting pipe is provided with more than one port, and each port is provided with a stop valve and a pressure sensor;
the high-low pressure control system comprises a pneumatic three-element, a residual pressure release valve, a booster pump, an air storage tank, a high-pressure air pipe, a low-pressure air pipe, a shuttle valve and a quick exhaust valve which are communicated in sequence on a connecting pipe, wherein the high-pressure air pipe is provided with a second pressure reducing valve and a second electromagnetic valve;
the temperature control device comprises a high-low temperature test bed and a temperature control module, and a temperature sensor is arranged in the high-low temperature test bed;
the electric control module comprises a control panel and a controller used for controlling the temperature control module and the high-low voltage control system, an editing module is arranged in the control panel, the control panel is communicated with the controller through a signal line and used for setting working parameters of the high-low voltage control system, the temperature control module and the time control module and respectively realizing parameter control of the high-low voltage control system, the temperature control module and the time control module through the controller; the temperature control module is communicated with the control panel through a signal wire to realize temperature control in the box body of the high-low temperature test bed; the first electromagnetic valve and the second electromagnetic valve of the high-low pressure control system are electrically connected with the controller to realize air pressure control on an air source; the time control module is arranged in the electric control box and is communicated with the control panel through a signal wire, so that high-pressure/low-pressure gas can be switched within set time.
The brake hose is arranged in the high-low temperature test bed, one end of the brake hose is provided with a plug, and the other end of the brake hose is connected with one port of the connecting pipe, wherein the port is provided with a stop valve.
And a safety valve and a first pressure gauge are arranged on the gas storage tank.
And a second pressure gauge is arranged on a pipeline between the quick exhaust valve and the shuttle valve.
The beneficial technical effects of the invention are as follows: because the high-low pressure control system, the temperature control module and the time control module are connected with the control panel through the controller, the control panel can edit a temperature-time curve required by a test standard, so that a high-temperature state and a low-temperature state alternately act on the brake hose to be tested; various parameters (pressure, temperature and time) in the test can be set through a panel of the control panel part and are executed through the controller; the invention also has the advantages of simple structure, convenient operation, accurate test data and good test repeatability.
Drawings
FIG. 1 is a first schematic structural diagram of the present invention;
FIG. 2 is a second schematic structural view of the present invention;
FIG. 3 is a schematic diagram of the gas supply of the present invention;
FIG. 4 is a control schematic of the present invention;
FIG. 5 is a graph of temperature versus time for a gas tightness test;
in the figure: 1. a gas source; 2. an intake valve; 3. a pneumatic three element; 4. a booster pump; 5. a gas storage tank; 6. a tee joint; 7. a first pressure reducing valve; 8. a second pressure reducing valve; 9. a first electromagnetic valve; 10. a second electromagnetic valve; 11. an electronic control box; 12. a control panel; 13. a shuttle valve; 14. a stop valve; 15. a brake hose; 16. a plug; 17. a power source; 18. high low temperature test bench.
A high-low temperature rapid change damp-heat test box, the model HRT 730Q-5 is a mature product; the temperature and time control function is realized;
Detailed Description
The air-tightness testing device of the present invention will be further described with reference to the accompanying drawings.
In fig. 1, 2 and 3, the invention comprises a high-low temperature air tightness test device of an automobile brake hose and a brake hose 15; the high-low temperature air tightness test device for the automobile brake hose comprises a connecting pipe, a high-low pressure control device, a temperature control module, an electric control module, a time control module and a time relay: DH48S; the first end of the connecting pipe is communicated with the air source 1, the second end of the connecting pipe is provided with more than one port, and each port is provided with a stop valve 14 and a pressure sensor; the high-low pressure control system comprises a pneumatic three element 3, a pressure alarm element and a high-low pressure sound-light pressure alarm which are sequentially communicated with the connecting pipe: and t794C, simultaneously prompting and alarming by sound and light. The residual pressure release valve, the booster pump 4, the gas storage tank 5, the high-pressure gas pipe and the low-pressure gas pipe which are communicated side by side, the shuttle valve 13 and the quick exhaust valve, wherein a gas source in the gas storage tank 5 enters a first reducing valve 7 and a first electromagnetic valve 9 on the low-pressure gas pipe through one end of a tee joint, enters one end of the shuttle valve 13 and then reaches a brake hose 15 to be detected through the quick exhaust valve; the air source in the air storage tank 5 enters a second reducing valve 8 and a second electromagnetic valve 10 on the high-pressure air pipe through one end of the other end of the tee joint, enters the other end of the shuttle valve 13, and then reaches a brake hose 15 to be detected through a quick exhaust valve; the conduction of the high-pressure/low-pressure pipeline is controlled by controlling the on-off of the first electromagnetic valve 9 and the second electromagnetic valve 10; the pressure alarm element can be arranged to ensure the safety of the air-tight test, when the pressure does not reach or exceed a set value, the pressure alarm element can be triggered, the whole system can automatically stop working and send out buzzing sound to alarm. The booster pump 4 is used to boost the pressure of the air supply 1 to a pressure slightly above the maximum pressure of the test and then to feed the boosted pressure air supply to the air reservoir 5. The temperature control device comprises a high-low temperature test bed 18, a temperature control module is arranged in the high-low temperature test bed 18 (model HRT 730Q-5), and a temperature sensor is arranged in the high-low temperature test bed 18. The brake hose 15 is arranged in the high-low temperature test bed 18, one end of the brake hose 15 is provided with a plug 16, and the other end of the brake hose 15 is connected with one port of the connecting pipe, wherein the port is provided with a stop valve 14. The electric control module comprises a control panel 12, a controller for controlling the temperature control module and the high-low voltage control system, and a time control module, wherein an editing module is arranged in the control panel 12, the control panel 12 is communicated with the controller through a signal wire and used for setting working parameters of the high-low voltage control system, the temperature control module and the time control module, and parameter control of the high-low voltage control system, the temperature control module and the time control module is realized through the controller respectively; the temperature control module is communicated with the controller through a signal wire respectively to realize the temperature control of the air source 1; the first electromagnetic valve 9 and the second electromagnetic valve 10 of the high-low pressure control system are electrically connected with the controller, and the time control module is arranged in the electric control box 11 and is communicated with the control panel 12 through a signal wire, so that high-pressure/low-pressure gas can be switched within a set time.
And a second pressure gauge is arranged on a pipeline between the quick exhaust valve and the shuttle valve 13.
After the power supply 17 is connected, the electric control box 11 and the control panel 12 are powered on, a controller in the electric control box 11 carries out self-checking on the first pressure reducing valve 7, the second pressure reducing valve 8, the first electromagnetic valve 9, the second electromagnetic valve 10 and the booster pump 4, a system reads a pressure value passing through the booster pump for self-checking, pressure reduction and self-checking are simulated on the first pressure reducing valve 7 and the second pressure reducing valve 8, high and low pressures are simulated and switched on the first electromagnetic valve 9 and the second electromagnetic valve 10, and the pressure value is self-checked. After confirming that no fault exists, setting editing (including pressure, temperature and time) of air tightness test parameters on the control panel 12, respectively realizing parameter control on a high-low pressure control system, a temperature control module and a time control module through a controller, monitoring test pressure and temperature through a pressure sensor and a temperature sensor, and when the air pressure and the temperature do not reach or exceed set values, giving an alarm on the pressure and the temperature, displaying the alarm on the control panel 12, and when the air pressure is insufficient, automatically stopping the work of the system through a pressure alarm element and giving a buzzer sound; after the self-checking of the electric control box 11 is normal, the gas source 1 flows through the gas inlet valve 2 and the pneumatic element 3, and reaches the booster pump 4, the gas is increased from low pressure to high pressure and is stored in the gas storage tank 5. The air source pressure of the common air compressor is insufficient, and the booster pump 4 can increase the air source pressure to the pressure required by the test.
The high-pressure gas in the gas storage tank 5 is divided into two paths by the tee joint 6, and enters the gas pressure control part to generate the gas pressures required by two test standards. The high-pressure gas in the gas storage tank 5 enters the first pressure reducing valve 7 through the tee joint, the pressure of a gas source is reduced to low pressure (required by test standards), the low-pressure gas enters the shuttle valve 13 through the second electromagnetic valve 10, the reduced-pressure gas source is connected with the brake hose 15 with the plug 16 through the quick exhaust and quick exhaust valve 14, and the gas tightness test is carried out to realize the low-pressure test. The other path of the high-pressure gas in the gas storage tank 5 enters a second pressure reducing valve 8 through a tee joint, the gas source pressure is reduced to high pressure (the high pressure required by the test standard is still lower than the gas source pressure in the gas storage tank 5), the high-pressure gas enters a shuttle valve 13 through a first electromagnetic valve 9, the reduced-pressure gas source is connected with a brake hose 15 with a plug 16 through a quick exhaust valve 14, and the gas tightness test is carried out to realize the high-pressure test. The pressure control part can directly switch low pressure to high pressure, and needs to firstly release pressure and then add low pressure when switching high pressure to low pressure.
The temperature control part of the air tightness test device controls the temperature change of the high and low temperature test bed 18 through the electric control box 11 by placing the brake hose 15 with the plug 16 on the high and low temperature test bed 18. Specifically, the software editing part is edited according to different temperature-time standard curves required by the test through the control panel 12 and executed through the electronic control box 11. The air tightness test device can synchronously switch the pressure and the temperature of the brake hose to be tested on the control panel 12.
FIG. 4 is a control schematic; the electric control module comprises a control panel 12, a controller for controlling the temperature control module and the high-low voltage control system, and a time control module, wherein an editing module is arranged in the control panel 12, the control panel 12 is communicated with the controller through a signal wire and used for setting working parameters of the high-low voltage control system, the temperature control module and the time control module, and parameter control of the high-low voltage control system, the temperature control module and the time control module is realized through the controller respectively; the temperature control module is communicated with the controller through a signal wire respectively to realize the temperature control of the air source 1; the first electromagnetic valve 9 and the second electromagnetic valve 10 of the high-low pressure control system are electrically connected with the controller, and the time control module is arranged in the electric control box 11 and is communicated with the control panel 12 through a signal wire, so that high-pressure/low-pressure gas can be switched within a set time.
In fig. 5, the pressure applied to the brake hose 15 is changed alternately with time according to the present invention, and the temperature applied to the brake hose 15 may be changed alternately with time. The high pressure and the low pressure which are preset in pressure are already divided, and the air pressure flowing through the stop valve 14 is switched within the set time and temperature by setting the high-low pressure value, the switching time and the temperature of the high-low temperature test bed 18 of the control panel 12; timing, constant temperature and constant pressure are all operated by the control panel 12; the temperature rise and the temperature fall of the high-low temperature test bed 18 take time, and the system can be used for turning off a valve firstly and then starting the test after the set equal temperature and pressure reach the specified values. The pressure and time alternation applied to the brake hose 15 makes the test device suitable for detecting the air tightness of the automobile brake hose under more complicated working conditions. The control panel 12 can edit temperature condition changes in the air tightness test process, the temperature condition changes are executed through the controller, and the control panel 12 and the controller are jointly controlled, so that the automobile brake hose to be detected can be subjected to the air tightness test under more complicated temperature conditions. The controller (programmable logic controller PLC) can accurately control the pressure and temperature conditions in the air tightness test process through the control panel 12, so that the test error can be reduced, and the repeatability of the test can be enhanced.
Claims (3)
1. The utility model provides a high low temperature gas tightness test system of car brake hose which characterized in that: comprises a high-low temperature air tightness test device of an automobile brake hose and a brake hose (15);
the high-low temperature air tightness test device for the automobile brake hose comprises a connecting pipe, a high-low pressure control device, a temperature control device, an electric control module and a time control module;
the first end of the connecting pipe is communicated with the air source (1), the second end of the connecting pipe is provided with more than one port, and each port is provided with a stop valve (14) and a pressure sensor;
the high-low pressure control system comprises a pneumatic three element (3), a residual pressure release valve, a booster pump (4), an air storage tank (5), a high-pressure air pipe, a low-pressure air pipe, a shuttle valve (13) and a quick exhaust valve which are communicated in sequence, wherein the high-pressure air pipe and the low-pressure air pipe are communicated side by side, the high-pressure air pipe is provided with a second reducing valve (8) and a second electromagnetic valve (10), and the low-pressure air pipe is provided with a first reducing valve (7) and a first electromagnetic valve (9);
the temperature control device comprises a high-low temperature test bed (18) and a temperature control module, and a temperature sensor is arranged in the high-low temperature test bed (18);
the electric control module comprises a control panel (12) and a controller for controlling the temperature control module and the high-low voltage control system, an editing module is arranged in the control panel (12), the control panel (12) is communicated with the controller through a signal line and used for setting working parameters of the high-low voltage control system, the temperature control module and the time control module and respectively realizing parameter control of the high-low voltage control system, the temperature control module and the time control module through the controller; the temperature control module is communicated with the control panel (12) through a signal wire to realize the temperature control of the inside of the box body of the high-low temperature test bed (18); a first electromagnetic valve (9) and a second electromagnetic valve (10) of the high-low pressure control system are electrically connected with the controller to realize the air pressure control of the air source (1); the time control module is arranged in the electric control box (11) and is communicated with the control panel (12) through a signal wire, so that high-pressure/low-pressure gas can be switched within a set time;
the brake hose (15) is arranged in the high-low temperature test bed (18), one end of the brake hose (15) is provided with a plug (16), and the other end of the brake hose is connected with one port of the connecting pipe, wherein the port is provided with a stop valve (14).
2. The high and low temperature air tightness test system of the automobile brake hose according to claim 1, characterized in that: and a safety valve and a first pressure gauge are arranged on the gas storage tank (5).
3. The high and low temperature air tightness test system for the automobile brake hose according to claim 1 or 2, characterized in that: a second pressure gauge is arranged on a pipeline between the quick exhaust valve and the shuttle valve (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110035692.3A CN114216631B (en) | 2021-01-12 | 2021-01-12 | High-low temperature air tightness test system for automobile brake hose |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110035692.3A CN114216631B (en) | 2021-01-12 | 2021-01-12 | High-low temperature air tightness test system for automobile brake hose |
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| Publication Number | Publication Date |
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| CN114216631A CN114216631A (en) | 2022-03-22 |
| CN114216631B true CN114216631B (en) | 2022-10-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110035692.3A Active CN114216631B (en) | 2021-01-12 | 2021-01-12 | High-low temperature air tightness test system for automobile brake hose |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116907789B (en) * | 2023-09-12 | 2023-11-28 | 中国航空工业集团公司沈阳空气动力研究所 | Multi-system synchronous identification method and device based on pressure measurement |
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| WO2014090134A1 (en) * | 2012-12-14 | 2014-06-19 | 唐山轨道客车有限责任公司 | Device, system and method for detecting air tightness of backup brake system of high-speed motor train unit |
| CN204064590U (en) * | 2014-07-31 | 2014-12-31 | 上海远梓电子科技有限公司 | A kind of air-brake coupling hose air pressure level pressure detection experiment machine |
| CN107576458A (en) * | 2017-09-26 | 2018-01-12 | 安徽安凯汽车股份有限公司 | A kind of brake line of automobile air-tightness automatic detection device and its detection method |
| CN110702336A (en) * | 2019-09-11 | 2020-01-17 | 烟台施丹普汽车零部件有限公司 | Brake hose high-pressure air-tight seal flow detection device |
| CN110940468A (en) * | 2019-05-05 | 2020-03-31 | 山西永有制冷科技有限公司 | Intelligent airtight detection test bed |
| CN112179583A (en) * | 2020-09-10 | 2021-01-05 | 中车长春轨道客车股份有限公司 | Bogie brake pipe air tightness automatic test device |
-
2021
- 2021-01-12 CN CN202110035692.3A patent/CN114216631B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014090134A1 (en) * | 2012-12-14 | 2014-06-19 | 唐山轨道客车有限责任公司 | Device, system and method for detecting air tightness of backup brake system of high-speed motor train unit |
| CN204064590U (en) * | 2014-07-31 | 2014-12-31 | 上海远梓电子科技有限公司 | A kind of air-brake coupling hose air pressure level pressure detection experiment machine |
| CN107576458A (en) * | 2017-09-26 | 2018-01-12 | 安徽安凯汽车股份有限公司 | A kind of brake line of automobile air-tightness automatic detection device and its detection method |
| CN110940468A (en) * | 2019-05-05 | 2020-03-31 | 山西永有制冷科技有限公司 | Intelligent airtight detection test bed |
| CN110702336A (en) * | 2019-09-11 | 2020-01-17 | 烟台施丹普汽车零部件有限公司 | Brake hose high-pressure air-tight seal flow detection device |
| CN112179583A (en) * | 2020-09-10 | 2021-01-05 | 中车长春轨道客车股份有限公司 | Bogie brake pipe air tightness automatic test device |
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