CN112179649A - High-temperature durability test device and method for exhaust brake valve of commercial vehicle - Google Patents
High-temperature durability test device and method for exhaust brake valve of commercial vehicle Download PDFInfo
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- CN112179649A CN112179649A CN202011053015.6A CN202011053015A CN112179649A CN 112179649 A CN112179649 A CN 112179649A CN 202011053015 A CN202011053015 A CN 202011053015A CN 112179649 A CN112179649 A CN 112179649A
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- 238000012360 testing method Methods 0.000 title claims abstract description 71
- 238000000034 method Methods 0.000 title claims description 11
- 238000001514 detection method Methods 0.000 claims abstract description 45
- 238000009413 insulation Methods 0.000 claims abstract description 18
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- 230000007704 transition Effects 0.000 claims description 14
- 238000010998 test method Methods 0.000 abstract description 2
- 230000008676 import Effects 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
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- 239000002912 waste gas Substances 0.000 description 1
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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
- G01M13/00—Testing of machine parts
- G01M13/003—Machine valves
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Abstract
The invention discloses a high-temperature durability test device and a high-temperature durability test method for an exhaust brake valve of a commercial vehicle, wherein the device comprises a power control unit and a compressed air heating unit; the power control unit comprises a first air source, a first pressure reducing valve, a first air storage tank, a first pressure gauge, an electromagnetic valve, a first exhaust brake valve and a second exhaust brake valve; the compressed air heating unit comprises a second air source, a second pressure reducing valve, a second air storage tank, a second pressure gauge, a stop valve, a temperature detection display device, a heat insulation device, a compressed air heater, a high-temperature-resistant temperature detection display device and a high-temperature-resistant air pressure detection display device. The high-temperature durability test device for the exhaust brake valve of the commercial vehicle can be controlled and adjusted according to the high-temperature and back-pressure conditions of the exhaust brake valve in the actual use condition of the vehicle, can simulate the working condition and environment of the exhaust brake valve in actual use, effectively verifies the durability of a product, reduces the test period and reduces the test cost.
Description
Technical Field
The invention belongs to the technical field of automobile part tests, and particularly relates to a device and a method for testing high-temperature durability of an exhaust brake valve of a commercial vehicle.
Background
The exhaust brake valve is mounted between an engine exhaust pipe and a muffler, and it is necessary to carry an engine and perform a high-temperature durability test on an engine test stand. The engine provides high-temperature waste gas medium and backpressure conditions for the butterfly valve in the exhaust brake valve body, one engine can only correspond to one exhaust brake valve to test, the test cost is high, the test period is long, the test conditions are not easy to adjust and control, the working condition and the environment in actual use cannot be accurately simulated, and the accuracy of the test result is low.
Therefore, a set of test device and a test method for testing the high-temperature durability of the exhaust brake valve according to the high-temperature and back-pressure conditions in the practical use condition of the vehicle are needed to be established.
Disclosure of Invention
The invention aims to solve the defects of the background technology and provides a device and a method for testing the high-temperature durability of an exhaust brake valve of a commercial vehicle.
In order to achieve the purpose, the invention adopts the technical scheme that: a high-temperature durability test device for a commercial vehicle exhaust brake valve comprises a power control unit and a compressed air heating unit; the power control unit comprises a first air source, a first pressure reducing valve, a first air storage tank, a first pressure gauge, an electromagnetic valve, a first exhaust brake valve and a second exhaust brake valve;
the first air source, the first pressure reducing valve, the first air storage tank, the first pressure gauge and the electromagnetic valve are sequentially connected, a normally closed position outlet of the electromagnetic valve is connected with the first exhaust brake valve, and a normally open position outlet of the electromagnetic valve is connected with the second exhaust brake valve;
the compressed air heating unit comprises a second air source, a second pressure reducing valve, a second air storage tank, a second pressure gauge, a stop valve, a temperature detection display device, a heat insulation device, a compressed air heater, a high-temperature-resistant temperature detection display device and a high-temperature-resistant air pressure detection display device;
the second air source, the second pressure reducing valve, the second air storage tank, the second pressure gauge, the stop valve, the temperature detection display device, the heat insulation device and the compressed air heater are sequentially connected, and the high-temperature-resistant temperature detection display device and the high-temperature-resistant air pressure detection display device are both arranged on a pipeline between the first exhaust brake valve and the second exhaust brake valve.
As a preferred embodiment, the power control unit further comprises an electric control box, and a control signal output end of the electric control box is connected with a control signal input end of the electromagnetic valve.
In a preferred embodiment, the compressed air heater is connected to the first exhaust brake valve by a first transition line.
In a preferred embodiment, the first exhaust brake valve and the second exhaust brake valve are connected by a second transition pipe, and the high temperature resistant temperature detection display device and the high temperature resistant air pressure detection display device are both disposed on the second transition pipe.
Preferably, an exhaust pipe is provided at an outlet of the second exhaust brake valve.
In a preferred embodiment, the first exhaust brake valve includes a first operating cylinder and a first valve body, a first butterfly valve is installed in the first valve body, and the first operating cylinder is used for controlling the first butterfly valve to rotate to close or open the first valve body.
In a preferred embodiment, the second exhaust brake valve includes a second operating cylinder and a second valve body, and a second butterfly valve is installed in the second valve body, and the second operating cylinder is used for controlling the second butterfly valve to rotate to close or open the second valve body.
The invention also provides a method for testing by using the device for testing the high-temperature durability of the exhaust brake valve of the commercial vehicle, which comprises the following steps:
1) adjusting a first pressure reducing valve to enable a first pressure gauge to meet the test pressure requirements of operating cylinders of a first exhaust brake valve and a second exhaust brake valve, wherein a first valve body of the first exhaust brake valve is opened at the moment, and a second operating cylinder of the second exhaust brake valve is pushed out to enable a second valve body to be closed;
2) opening the stop valve, and adjusting the second pressure reducing valve until the pressure value of the high-temperature-resistant air pressure detection display device reaches the test back pressure values of the first butterfly valve and the second butterfly valve in the first exhaust brake valve and the second exhaust brake valve;
3) starting the heating function of the compressed air heater to heat the compressed air until the temperature value of the high-temperature-resistant temperature detection and display device reaches the test temperature values of a first butterfly valve and a second butterfly valve in the first exhaust brake valve and the second exhaust brake valve;
4) the control electromagnetic valve is electrified, the first control cylinder of the first exhaust brake valve supplies air to close the first valve body, and the second control cylinder of the second exhaust brake valve exhausts air to open the second valve body; the electromagnetic valve is controlled to be powered off, the first control cylinder of the first exhaust brake valve exhausts air to enable the first valve body to be opened, and meanwhile the second control cylinder of the second exhaust brake valve intakes air to enable the second valve body to be closed, so that one test cycle is completed;
5) and starting the electric control box, setting time and times, enabling the first exhaust brake valve and the second exhaust brake valve to circularly act according to the test steps, and carrying out a high-temperature durability test on the exhaust brake valves.
Compared with the prior art, the invention has the beneficial effects that:
the high-temperature durability test device for the exhaust brake valve of the commercial vehicle can be controlled and adjusted according to the high-temperature and back-pressure conditions of the exhaust brake valve in the actual use condition of the vehicle, can simulate the working condition and environment of the exhaust brake valve in actual use, effectively verifies the durability of the product, reduces the test period, reduces the test cost and has high accuracy of the result of verifying the product.
Secondly, the high-temperature durability test device for the exhaust brake valve of the commercial vehicle can establish the back pressure of the butterfly valve in the valve body, and when the butterfly valve is closed, the back pressure is established in the butterfly valve in the valve body by inputting heated compressed air into the valve body; the adjustment of the back pressure value of the butterfly valve can be realized by adjusting the air pressure of compressed air, and can be monitored in real time in the test process.
Thirdly, the high-temperature durability test device for the exhaust brake valve of the commercial vehicle can play a role in heat insulation protection, the heat insulation device takes away heat conducted by the compressed air heater in a circulating water cooling mode to form a buffer belt of a normal-temperature compressed air medium and a high-temperature compressed air medium, and the buffer belt plays a role in isolating heat so as to protect the pressure reducing valve and the air storage tank; the temperature of the compressed air medium conducted from the compressed air heater is monitored through the temperature detection display device, and the heat insulation protective cover is arranged outside the pipeline and the connecting piece between the outlet of the heat insulation device and the inlet of the compressed air heater and between the outlet of the compressed air heater and the exhaust pipe.
Fourthly, the compressed air heater in the high-temperature durability test device for the exhaust brake valve of the commercial vehicle is a temperature-resistant and pressure-resistant electric heater, can be set at any temperature and keep the temperature constant, and can heat the compressed air entering the butterfly valve inside the valve body of the exhaust brake valve so as to simulate the high-temperature state of the exhaust gas of the engine and realize the real-time detection and control of the test temperature.
Fifthly, in the high-temperature durability test device for the exhaust brake valve of the commercial vehicle, a high-temperature resistant temperature detection display device and a high-temperature resistant air pressure detection display device are designed on a pipeline between the first exhaust brake valve and the second exhaust brake valve, and can be used for detecting and displaying the pressure and the temperature of compressed air input into the valve body of the exhaust brake valve.
Sixth, the high-temperature durability test device for the exhaust brake valve of the commercial vehicle can input high-temperature compressed air to the butterfly valve inside the valve body, the high-temperature compressed air is heated by the compressed air heater and input to the butterfly valve inside the exhaust brake valve body, and test temperature is detected and controlled in real time.
Seventhly, the first exhaust brake valve and the second exhaust brake valve designed by the commercial vehicle exhaust brake valve high-temperature durability test device can be connected in series, so that the high-temperature durability test of the first exhaust brake valve and the second exhaust brake valve can be carried out, and the first exhaust brake valve and the second exhaust brake valve can also be connected in parallel at the outlet end of the compressed air heater to carry out the high-temperature durability test of two exhaust brake valves.
Drawings
FIG. 1 is a schematic structural diagram of a commercial vehicle exhaust brake valve high-temperature durability test device of the invention;
in the figure, 1-a first air source, 2-a first pressure reducing valve, 3-a first air storage tank, 4-a first pressure gauge, 5-an electromagnetic valve, 6-a first exhaust brake valve, 6.1-a first operating cylinder, 6.2-a first valve body, 6.3-a first butterfly valve, 7-a second exhaust brake valve, 7.1-a second operating cylinder, 7.2-a second valve body, 7.3-a second butterfly valve, 8-a second air source, 9-a second pressure reducing valve, 10-a second air storage tank, 11-a second pressure gauge, 12-a stop valve, 13-a temperature detection display device, 14-a heat insulation device, 15-a compressed air heater, 16-a high temperature resistant temperature detection display device, 17-a high temperature resistant air pressure detection display device, 18-an electric control box, 19-a first transition pipe, 20-a second transition pipe, 21-an exhaust pipe.
Detailed Description
The invention will be further described in detail with reference to the following drawings and specific examples, which are not intended to limit the invention, but are for clear understanding.
The high-temperature durability test device for the exhaust brake valve of the commercial vehicle, as shown in FIG. 1, comprises a power control unit and a compressed air heating unit; the power control unit comprises a first air source 1, a first pressure reducing valve 2, a first air storage tank 3, a first pressure gauge 4, an electromagnetic valve 5, a first exhaust brake valve 6, a second exhaust brake valve 7 and an electric cabinet 18; the first air source 1, the first pressure reducing valve 2, the first air storage tank 3, the first pressure gauge 4 and the electromagnetic valve 5 are sequentially connected, a normally closed position outlet of the electromagnetic valve 5 is connected with the first exhaust brake valve 6, a normally open position outlet of the electromagnetic valve 5 is connected with the second exhaust brake valve 7, and a control signal output end of the electric cabinet 18 is connected with a control signal input end of the electromagnetic valve 5. An exhaust pipe 21 is provided at an outlet of the second exhaust brake valve 7. First exhaust brake valve 6 includes first manipulation jar 6.1 and first valve body 6.2, install first butterfly valve 6.3 in the first valve body 6.2, first manipulation jar 6.1 is used for controlling first butterfly valve 6.3 and rotates in order to close or open first valve body 6.2. The second exhaust brake valve 7 comprises a second operating cylinder 7.1 and a second valve body 7.2, a second butterfly valve 7.3 is installed in the second valve body 7.2, and the second operating cylinder 7.1 is used for controlling the second butterfly valve 7.3 to rotate so as to close or open the second valve body 7.2.
The compressed air heating unit comprises a second air source 8, a second pressure reducing valve 9, a second air storage tank 10, a second pressure gauge 11, a stop valve 12, a temperature detection display device 13, a heat insulation device 14, a compressed air heater 15, a high temperature resistant temperature detection display device 16 and a high temperature resistant air pressure detection display device 17; the second air source 8, the second pressure reducing valve 9, the second air storage tank 10, the second pressure gauge 11, the stop valve 12, the temperature detection display device 13, the heat insulation device 14 and the compressed air heater 15 are sequentially connected, and the high-temperature-resistant temperature detection display device 16 and the high-temperature-resistant air pressure detection display device 17 are both arranged on a pipeline between the first exhaust brake valve 6 and the second exhaust brake valve 7. The compressed air heater 15 is connected to the first exhaust brake valve 6 via a first transition line 19. The first exhaust brake valve 6 is connected with the second exhaust brake valve 7 through a second transition pipe 20, and the high-temperature resistant temperature detection display device 16 and the high-temperature resistant air pressure detection display device 17 are both arranged on the second transition pipe 20.
In this embodiment, the inlet of first relief pressure valve 2 links to each other with first air supply 1, its export links to each other with 3 imports of first gas holder, 3 exports of first gas holder are equipped with first manometer 4, and be connected to 5 imports of solenoid valve, through the adjustable 5 inlet pressure of solenoid valve 5 of monitoring of first relief pressure valve 2 and first manometer 4, solenoid valve 5 is two four-way solenoid valve, the control cylinder import of first exhaust brake valve 6 is received to 5 normally closed position exports of solenoid valve, the control cylinder import of second exhaust brake valve 7 is received to the normally open position export of solenoid valve, solenoid valve 5 is controlled by electric cabinet 18, electric cabinet 18 mainly includes timer and counter, can set up experimental frequency and count. The action control unit can operate the cylinder working pressure, frequency and times according to the test conditions to carry out action circulation on the first exhaust brake valve 6 and the second exhaust brake valve 7.
The inlet of a second pressure reducing valve 9 is connected with a second air source 8, the outlet of the second pressure reducing valve is connected with the inlet of a second air storage tank 10, a second pressure gauge 11 is installed at the outlet of the second air storage tank 10, a stop valve 12 is installed at the outlet of the second pressure gauge 11, the stop valve 12 is used for cutting off the input of compressed air, a heat insulation device 14 is connected to the rear end of the stop valve 12, a temperature detection display device 13 is connected to the inlet of the heat insulation device 14, the heat insulation device 14 comprises a stainless steel coil pipe and a circulating water tank, the stainless steel coil pipe sends the compressed air to the input end of a compressed air heater 15, the coil pipe is immersed in the circulating water tank, and when the temperature detection display device 13. The outlet of the heat insulation device 14 is connected with the inlet of a compressed air heater 15, the compressed air heater is a temperature-resistant and pressure-resistant electric heater, the temperature can be set at will, and the temperature value is kept constant. The high temperature resistant temperature detection display means 16 and the high temperature resistant air pressure detection display means 17 are used to detect and display the pressure and temperature of the compressed air input to the inside of the exhaust brake valve.
The outlet of the compressed air heater 15 is connected with the valve body inlet mounting surface of the first exhaust brake valve 6 through a first transition pipe 19, the valve body inlet mounting surface of the second exhaust brake valve 7 is connected through a second transition pipe 20, the valve body outlet mounting surface of the second exhaust brake valve 7 is connected with an exhaust pipe 21, and the second transition pipe 20 is provided with a high temperature resistant temperature detection display device 16 and a high temperature resistant air pressure detection display device 17 for detecting and displaying the pressure and temperature of the compressed air input into the main test exhaust brake valve. The pipelines and the connecting pieces between the outlet of the heat insulation device 14 and the inlet of the compressed air heater 15 and between the outlet of the compressed air heater 15 and the exhaust pipe 21 are made of stainless steel materials, and heat insulation protective covers are arranged outside the pipelines and the connecting pieces; the other pipelines can adopt nylon quick inserting air pipes. The compressed air heater 15 can simulate the actual vehicle state of the first exhaust brake valve 6 and the second exhaust brake valve 7 according to the test conditions of exhaust temperature and exhaust back pressure.
The invention also provides a method for testing by using the device for testing the high-temperature durability of the exhaust brake valve of the commercial vehicle, which comprises the following steps:
1) adjusting the first pressure reducing valve 2 to enable the first pressure gauge 4 to meet the test pressure requirements of the operating cylinders of the first exhaust brake valve 6 and the second exhaust brake valve 7, wherein at the moment, the first valve body 6.2 of the first exhaust brake valve 6 is opened, and the second operating cylinder 7.1 of the second exhaust brake valve 7 is pushed out to enable the second valve body 7.2 to be closed;
2) opening the stop valve 12, adjusting the second pressure reducing valve 9 until the pressure value of the high temperature resistant air pressure detection display device 17 reaches the test back pressure value (for example, set to 400kPa) of the first butterfly valve 6.3 and the second butterfly valve 7.3 in the first exhaust brake valve 6 and the second exhaust brake valve 7;
3) starting the heating function of the compressed air heater 15, heating the compressed air until the temperature value of the high temperature resistant temperature detection display device 16 reaches the test temperature values (for example, set as 450 ℃) of the first butterfly valve 6.3 and the second butterfly valve 7.3 in the first exhaust brake valve 6 and the second exhaust brake valve 7;
4) the control electromagnetic valve 5 is electrified, the first operating cylinder 6.1 of the first exhaust brake valve 6 supplies air to close the first valve body 6.2, and the second operating cylinder 7.1 of the second exhaust brake valve 7 exhausts air to open the second valve body 7.2; the control electromagnetic valve 5 is powered off, the first control cylinder 6.1 of the first exhaust brake valve 6 exhausts to open the first valve body 6.2, and the second control cylinder 7.1 of the second exhaust brake valve 7 intakes to close the second valve body 7.2, so that a test cycle is completed;
5) and starting the electric control box 18, setting time and times, enabling the first exhaust brake valve 6 and the second exhaust brake valve 7 to circularly act according to the test steps, and carrying out a high-temperature durability test of the exhaust brake valves.
The device and the method for testing the high-temperature durability of the exhaust brake valve of the commercial vehicle can control and adjust the high-temperature and back-pressure conditions of the exhaust brake valve in the using working condition of the actual vehicle, can simulate the working condition and environment of the exhaust brake valve in actual use, effectively verify the durability of the product, reduce the testing period, reduce the testing cost and effectively verify the product.
The above description is only for the specific embodiments of the present invention, and it should be noted that the remaining detailed descriptions are related to the prior art, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the protection scope of the present invention.
Claims (8)
1. The utility model provides a commercial car exhaust brake valve high temperature durability test device which characterized in that: comprises a power control unit and a compressed air heating unit; the power control unit comprises a first air source (1), a first pressure reducing valve (2), a first air storage tank (3), a first pressure gauge (4), an electromagnetic valve (5), a first exhaust brake valve (6) and a second exhaust brake valve (7);
the first air source (1), the first pressure reducing valve (2), the first air storage tank (3), the first pressure gauge (4) and the electromagnetic valve (5) are sequentially connected, a normally closed position outlet of the electromagnetic valve (5) is connected with the first exhaust brake valve (6), and a normally open position outlet of the electromagnetic valve (5) is connected with the second exhaust brake valve (7);
the compressed air heating unit comprises a second air source (8), a second pressure reducing valve (9), a second air storage tank (10), a second pressure gauge (11), a stop valve (12), a temperature detection display device (13), a heat insulation device (14), a compressed air heater (15), a high-temperature-resistant temperature detection display device (16) and a high-temperature-resistant air pressure detection display device (17);
the second air source (8), the second pressure reducing valve (9), the second air storage tank (10), the second pressure gauge (11), the stop valve (12), the temperature detection display device (13), the heat insulation device (14) and the compressed air heater (15) are sequentially connected, and the high-temperature-resistant temperature detection display device (16) and the high-temperature-resistant air pressure detection display device (17) are arranged on a pipeline between the first exhaust brake valve (6) and the second exhaust brake valve (7).
2. The commercial vehicle exhaust brake valve high-temperature durability test device according to claim 1, characterized in that: the power control unit further comprises an electric cabinet (18), and a control signal output end of the electric cabinet (18) is connected with a control signal input end of the electromagnetic valve (5).
3. The commercial vehicle exhaust brake valve high-temperature durability test device according to claim 2, characterized in that: the compressed air heater (15) is connected with the first exhaust brake valve (6) through a first transition pipe (19).
4. The commercial vehicle exhaust brake valve high-temperature durability test device according to claim 3, characterized in that: the first exhaust brake valve (6) is connected with the second exhaust brake valve (7) through a second transition pipe (20), and the high-temperature-resistant temperature detection display device (16) and the high-temperature-resistant air pressure detection display device (17) are both arranged on the second transition pipe (20).
5. The commercial vehicle exhaust brake valve high-temperature durability test device according to claim 4, characterized in that: an exhaust pipe (21) is arranged at the outlet of the second exhaust brake valve (7).
6. The commercial vehicle exhaust brake valve high-temperature durability test device according to claim 5, characterized in that: first exhaust brake valve (6) include first manipulation jar (6.1) and first valve body (6.2), install first butterfly valve (6.3) in first valve body (6.2), first manipulation jar (6.1) are used for controlling first butterfly valve (6.3) and rotate in order to close or open first valve body (6.2).
7. The commercial vehicle exhaust brake valve high-temperature durability test device according to claim 6, characterized in that: the second exhaust brake valve (7) comprises a second control cylinder (7.1) and a second valve body (7.2), a second butterfly valve (7.3) is installed in the second valve body (7.2), and the second control cylinder (7.1) is used for controlling the second butterfly valve (7.3) to rotate so as to close or open the second valve body (7.2).
8. A method for testing the high-temperature durability of the exhaust brake valve of the commercial vehicle according to claim 7, wherein the method comprises the following steps: the method comprises the following steps:
1) adjusting a first pressure reducing valve (2) to enable a first pressure gauge (4) to meet the requirements of the operating cylinder test pressure of a first exhaust brake valve (6) and a second exhaust brake valve (7), wherein at the moment, a first valve body (6.2) of the first exhaust brake valve (6) is opened, and a second operating cylinder (7.1) of the second exhaust brake valve (7) is pushed out to enable a second valve body (7.2) to be closed;
2) opening the stop valve (12), and adjusting the second pressure reducing valve (9) until the pressure value of the high-temperature-resistant air pressure detection display device (17) reaches the test back pressure values of the first butterfly valve (6.3) and the second butterfly valve (7.3) in the first exhaust brake valve (6) and the second exhaust brake valve (7);
3) starting the heating function of a compressed air heater (15) to heat the compressed air until the temperature value of a high-temperature-resistant temperature detection display device (16) reaches the test temperature values of a first butterfly valve (6.3) and a second butterfly valve (7.3) in a first exhaust brake valve (6) and a second exhaust brake valve (7);
4) the control electromagnetic valve (5) is electrified, the first control cylinder (6.1) of the first exhaust brake valve (6) supplies air to close the first valve body (6.2), and meanwhile, the second control cylinder (7.1) of the second exhaust brake valve (7) exhausts air to open the second valve body (7.2); the electromagnetic valve (5) is controlled to be powered off, the first control cylinder (6.1) of the first exhaust brake valve (6) exhausts to open the first valve body (6.2), and meanwhile, the second control cylinder (7.1) of the second exhaust brake valve (7) intakes to close the second valve body (7.2), so that a test cycle is completed;
5) and starting the electric control box (18), setting time and times, and enabling the first exhaust brake valve (6) and the second exhaust brake valve (7) to circularly act according to the test steps to perform a high-temperature durability test of the exhaust brake valves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011053015.6A CN112179649A (en) | 2020-09-29 | 2020-09-29 | High-temperature durability test device and method for exhaust brake valve of commercial vehicle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011053015.6A CN112179649A (en) | 2020-09-29 | 2020-09-29 | High-temperature durability test device and method for exhaust brake valve of commercial vehicle |
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| CN112179649A true CN112179649A (en) | 2021-01-05 |
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| CN202011053015.6A Pending CN112179649A (en) | 2020-09-29 | 2020-09-29 | High-temperature durability test device and method for exhaust brake valve of commercial vehicle |
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Application publication date: 20210105 |