Military product chassis brake system sealing test equipment

Abstract

The invention discloses military product chassis brake system sealing test equipment which comprises a cabinet, a PLC, an industrial personal computer, a test pipeline and a pressure signal automatic acquisition system. The test pipeline is installed in the cabinet, one end of the test pipeline is connected with a brake main valve air source control interface in the chassis brake system, the other end of the test pipeline is connected with a compressed air source, the test pipeline is provided with a regulating valve and a pressure signal automatic acquisition system, the pressure signal automatic acquisition system is connected with the PLC, the PLC is connected with the industrial personal computer, and the PLC and the industrial personal computer are installed on the cabinet. The military product chassis brake system airtightness test equipment is simple to operate and convenient and fast to use, effectively improves the airtightness detection efficiency of a military product chassis brake system, realizes integration of test detection and information recording, solves the problems of difficult manual detection implementation, poor detection result accuracy, poor test result traceability and the like, and improves the detection efficiency of the military product chassis brake system. The test quality and reliability of the chassis brake system are improved, and the quality risk is controllable.

Description

Technical Field

[0001] The invention relates to the field of automobile brake system sealing test and detection, and in particular to a military chassis brake system sealing test device. Background Art

[0002] The brake system is an important component of the military chassis (car), and involves the safety performance of the military chassis (car). At present, the military chassis brake system mainly uses two braking methods: pneumatic brake and air-liquid brake. Both brake systems use compressed air as the system power source, so the sealing requirements of the brake system are relatively high. If the air tightness of the brake system is not up to standard, it will affect the braking performance of the military chassis (car).

[0003] In the prior art, the air tightness test of the brake system is manually tested by connecting a pressure gauge. Since the military chassis brake system is a dual-line brake system, two pressure gauges need to be installed to test the two lines of the system at the same time, and multiple people need to cooperate: one person is responsible for reading the timer and pressure gauge to manually control the test time and read the initial test pressure, and the other person is responsible for stepping on the test chassis (or car) brake pedal in the cab to adjust the initial test pressure and cooperate with the air tightness test. There are many problems in this test, mainly: first, due to the working characteristics of the air pressure system itself, the system pressure fluctuates violently during the inflation and deflation process, and then slowly tends to stabilize after the inflation and deflation are completed. Therefore, after inflation and deflation, it is necessary to stabilize the pressure for a period of time before testing and testing, but the manual detection and control method is difficult to control the system pressure stabilization time and test time, resulting in the difficulty in ensuring the accuracy of the test results; second, the accuracy of the initial test pressure is difficult to ensure by adjusting the initial test pressure by stepping on the chassis brake pedal; third, the traceability of the test results is poor. Summary of the invention

[0004] The present invention provides a military chassis brake system sealing test device, which effectively solves the problems of manual detection of military model chassis brake system airtightness test, difficulty in controlling system pressure stabilization time and test time, poor accuracy of test results, inability to accurately adjust the initial pressure of the test, poor traceability of the test results, etc.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A military chassis brake system sealing test equipment comprises a cabinet, a PLC, an industrial computer, a test pipeline, and an automatic pressure signal acquisition system; the test pipeline is installed in the cabinet, one end of which is connected to the brake master valve air source control interface in the chassis brake system, and the other end is connected to the compressed air source, a regulating valve and an automatic pressure signal acquisition system are installed on the test pipeline, the automatic pressure signal acquisition system is connected to the PLC, the PLC is connected to the industrial computer, and the PLC and the industrial computer are installed on the cabinet.

[0007] As a preferred embodiment of the above solution, a filter is installed at the air inlet end of the test pipeline.

[0008] As a preferred embodiment of the above solution, a pressure gauge is installed on the test pipeline, and the pressure gauge is fixed on the cabinet.

[0009] As a preferred embodiment of the above solution, a muffler is installed at the exhaust end of the test pipeline.

[0010] As a preferred embodiment of the above scheme, the regulating valve includes a manual ball valve, an electric ball valve, and a high-voltage electrical proportional valve, and the high-voltage electrical proportional valve is connected to the PLC.

[0011] As a preferred embodiment of the above solution, the automatic pressure signal acquisition system may adopt a pressure transmitter.

[0012] As a preferred embodiment of the above solution, a UPS power supply is configured in the cabinet, and an external power cord is also configured on the cabinet.

[0013] As a preferred embodiment of the above scheme, the cabinet is provided with a buzzer, a control power switch, an emergency stop switch, and a computer power switch.

[0014] Due to the above structure, the beneficial effects of the present invention are:

[0015] The military chassis brake system sealing test equipment of the present application is simple to operate, convenient and quick to use, effectively improves the airtightness detection efficiency of the military chassis brake system, realizes the integration of test detection and information recording, solves the problems of difficulty in implementing manual detection, poor accuracy of test results, poor traceability of test results, etc., improves the test quality and reliability of the chassis brake system, and realizes controllable quality risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for describing the embodiments are briefly introduced below.

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 It is the schematic diagram of the device of the present invention;

[0019] Figure 3 This is a flow chart of the five brake sealing tests of the present invention;

[0020] Figure 4 This is a flow chart of the 3-minute static sealing test of the present invention;

[0021] Figure 5 It is a flow chart of the 3-minute working sealing test of the present invention. DETAILED DESCRIPTION

[0022] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0023] like Figure 1 , Figure 2 As shown, this embodiment provides a military chassis brake system sealing test equipment, including a cabinet 20, a PLC 15, an industrial computer (touch screen all-in-one machine) 16, a test pipeline 10, an electrical control system, a power supply system (UPS power supply) and auxiliary configurations.

[0024] The test pipeline 10 is installed in the cabinet 20, one end of which is connected to the brake main valve air source control interface (test interface 1, test interface 2) in the chassis brake system, and the other end is connected to the compressed air source, and the test system is filled with compressed air through the self-inflation function of the chassis brake system (using the engine air compressor) or an external compressed air source. A filter 1 is installed at the air inlet end of the test pipeline 10, and a regulating valve 30 (including a manual ball valve 2, an electric ball valve 3, and a high-voltage electrical proportional valve 4, wherein the high-voltage electrical proportional valve 4 is connected to the PLC15) is installed on the pipeline. A pressure gauge 5 (the pressure gauge is fixed on the cabinet 20) and a pressure signal automatic acquisition system 6, and a muffler 7 is installed at the exhaust end of the test pipeline 10, and the air pressure of the test system is adjusted by controlling the opening degree of the regulating valve 30.

[0025] The pressure signal automatic acquisition system 6 can use a pressure transmitter, and the system pressure can be monitored in real time through the pressure transmitter to ensure the accurate control of the initial pressure of the test. The pressure signal automatic acquisition system is connected to PLC15, PLC15 is connected to industrial computer 16, PLC15 and industrial computer 16 are installed on the cabinet 20, and the pressure-time curve display, test data storage, and test report output can be realized on the industrial computer 16 to avoid manual timing and misjudgment of readings. The number (or VIN code) of each test chassis can be recorded, and the number can be associated with the real-time storage test detection data and the pressure-time curve to form a chassis test record report, thereby improving the traceability of the test results.

[0026] The cabinet 20 is provided with a UPS power supply 17, and the cabinet 20 is also provided with an external power cord, which can also be used to connect an external power supply, with two power supply modes, which can meet the use of various working conditions. The cabinet 20 is also provided with a buzzer 21, a control power switch 22, an emergency stop switch 23, and a computer power switch 24.

[0027] The working steps and principles of the above structure are as follows:

[0028] (1) Test preparation:

[0029] a) Connect the equipment test interface to the brake master valve air source control interface (port 11, port 12) of the chassis brake system to be tested;

[0030] b) Equipment startup and operation inspection;

[0031] c) Set or confirm the test item parameters and enter the chassis (vehicle) number information.

[0032] (2) Test: Select the corresponding test items and carry out the test. The test process of each test item is as follows: Figure 3 , Figure 4 , Figure 5 After each test item is completed, you can select another test item and click Start Test.

[0033] a) Pre-charge the brake system: Start the engine of the chassis to be tested to charge the brake system and charge the brake system pressure to the test pressure or above. If necessary, external compressed air can also be used for charging.

[0034] b) Adjust the system pressure: After the system air pressure stabilizes, operate the pressure relief ball valve handle on the equipment test interface to adjust the system air pressure to within the allowable deviation range of the initial test air pressure according to the stabilized air pressure value.

[0035] c) 5 brakes: Select to start "5 brake sealing tests", and immediately step on the brake pedal for a total of 5 consecutive times. Each time, you need to step on the pedal to the bottom and then release it completely. For the first 4 brakes, pause for 1 to 2 seconds after each release of the pedal before stepping on the brake. After 5 brakes, the software system automatically stops the test after the pressure maintenance ends, and records the test data to determine whether the test is qualified.

[0036] d) Static pressure test for 3 minutes: After selecting to start the "3-minute static sealing test", the system automatically maintains pressure for 3 minutes. The software records the start and end time, air pressure and other parameters, and stops after 3 minutes.

[0037] e) Working pressure test for 3 minutes: Select to start "3-minute working sealing test", press the brake pedal to the bottom, and immediately click to start pressure holding for 3 minutes. The software records the start and end time and air pressure parameters after the brake pedal is pressed, and stops after 3 minutes. Release the brake pedal after the pressure holding is completed.

[0038] f) End of test: After the test is completed, the equipment automatically ends and stores the test data. If the test fails, the test system pipeline needs to be checked for leaks and then retested.

[0039] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A military chassis brake system sealing test equipment, characterized by: It includes a cabinet, a PLC, an industrial computer, a test pipeline, and an automatic pressure signal acquisition system; the test pipeline is installed in the cabinet, one end of which is connected to the air source control interface of the main brake valve in the chassis brake system, and the other end is connected to the compressed air source. A regulating valve and an automatic pressure signal acquisition system are installed on the test pipeline. The automatic pressure signal acquisition system is connected to the PLC, the PLC is connected to the industrial computer, and the PLC and the industrial computer are installed on the cabinet.

2. The military chassis brake system sealing test equipment according to claim 1 is characterized by: A filter is installed at the air inlet end of the test pipeline.

3. The military chassis brake system sealing test equipment according to claim 1 is characterized by: A pressure gauge is installed on the test pipeline and is fixed on the cabinet.

4. The military chassis brake system sealing test equipment according to claim 1 is characterized by: A muffler is installed at the exhaust end of the test pipeline.

5. The military chassis brake system sealing test equipment according to claim 1 is characterized by: The regulating valve comprises a manual ball valve, an electric ball valve and a high-voltage electrical proportional valve, and the high-voltage electrical proportional valve is connected to a PLC.

6. The military chassis brake system sealing test equipment according to claim 1 is characterized by: The pressure signal automatic acquisition system may adopt a pressure transmitter.

7. The military chassis brake system sealing test equipment according to claim 1 is characterized by: A UPS power supply is arranged in the cabinet, and an external power line is also arranged on the cabinet.

8. The military chassis brake system sealing test equipment according to claim 1 is characterized by: The cabinet is provided with a buzzer, a control power switch, an emergency stop switch and a computer power switch.

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