An air tightness detection system for EMU brake pipes and air springs

Abstract

The utility model discloses an air tightness detection system for brake pipelines and air springs of electric trains, comprising a mobile carriage, a touch integrated machine arranged on the mobile carriage, a power supply introduction reel, an air tightness detection unit and an electric control unit; the touch integrated machine, the power supply introduction reel and the air tightness detection unit are respectively connected to the electric control unit; the air tightness detection unit comprises an air source processing unit, a pneumatic unit and a test reel connected to the tested air spring or brake pipeline; a pressure sensor connected to the electric control unit is installed in the test circuit of the tested air spring or brake pipeline; a time recorder which works synchronously with the collection of the pressure sensor is connected to the electric control unit; through an automated test process, automatic recording and automatic judgment of test results are realized, and the test speed and overall work efficiency are significantly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of EMU maintenance, and more specifically relates to an air tightness detection system for EMU brake pipelines and air springs. Background Art

[0002] The air spring and brake line of the EMU are important components of the EMU bogie. The air spring plays a key role in the suspension system of the EMU. Through functions such as height adjustment, buffering and shock absorption, and stability control, it ensures the driving safety of the train and the comfort of passengers. In order to ensure the functional stability of the air spring, the air tightness test of each bogie air spring is required during the advanced repair stage. The brake line is an important component of the train braking system and is directly related to the driving safety of the train. In order to ensure the good condition of the brake line, the air tightness test of the brake line is required.

[0003] After the bogie is disassembled and overhauled and assembled, before loading, the brake line and air spring need to be tested for air tightness. Currently, all air tightness tests are completed manually. However, this manual testing method is cumbersome and cannot automatically record and judge the test results. Summary of the invention

[0004] In view of the above defects or improvement needs of the prior art, the utility model provides an air tightness detection system for EMU brake pipes and air springs. Through an automated testing process, it can automatically record and automatically judge the test results, significantly improving the test speed and overall work efficiency; through the abnormal warning and automatic shutdown functions, it can respond in time when a problem is detected to prevent potential safety risks; by performing multiple test processes simultaneously, it reduces the waiting time and makes the test process smoother; the comprehensive air tightness test bench of the utility model not only improves the efficiency and safety of the testing work, but also improves the quality of the product, providing strong technical support for the maintenance and servicing of the EMU bogie.

[0005] In order to achieve the above-mentioned object, the utility model provides an air tightness detection system for brake pipelines and air springs of EMUs, comprising a mobile vehicle, a touch integrated machine arranged on the mobile vehicle, a power supply introduction reel, an air tightness detection unit and an electronic control unit; wherein the touch integrated machine, the power supply introduction reel and the air tightness detection unit are respectively connected to the electronic control unit;

[0006] The air tightness detection unit includes an air source processing unit, at least three pneumatic units connected to the air source processing unit, and a test hose reel connected to each of the pneumatic units;

[0007] The test hose reel is connected to the air spring or brake pipeline to be tested;

[0008] The electronic control unit is connected to an air compressor; a pressure sensor connected to the electronic control unit is installed in the test circuit of the air spring or brake pipeline being tested; a time recorder that works synchronously with the pressure sensor is connected to the electronic control unit;

[0009] The touch integrated machine comprises an operation interface, an emergency stop button, an alarm light and a reset button; a central processing unit connected to the operation interface, and an emergency stop button, an alarm light and a reset button arranged on the side of the operation interface.

[0010] Furthermore, the air source processing unit includes a water separation filter for filtering compressed air, a pressure regulating valve, a pressure gauge and a pressure switch arranged at the output end of the water separation filter.

[0011] Furthermore, the pressure regulating valve, pressure gauge and pressure switch are respectively connected to the electronic control unit.

[0012] Furthermore, a pneumatic valve is provided between the air source processing unit and the pneumatic unit.

[0013] Furthermore, a safety valve is provided between the pneumatic unit and the air spring or brake line being tested.

[0014] Furthermore, the mobile vehicle includes a vehicle body, running wheels arranged at the bottom of the vehicle body, and handrails arranged at the sides of the vehicle body.

[0015] Furthermore, the touch integrated machine is arranged on the top of the vehicle body; the power supply introduction reel, the airtightness detection unit, the electronic control unit and the parts storage area are arranged inside the vehicle body.

[0016] Furthermore, the operation interface also integrates an air spring air tightness test start key, a brake line air tightness test start key, an air charging button, a parameter setting module, an air tightness identification and diagnosis module, and a data storage and analysis module connected to the central processing unit.

[0017] In general, the above technical solutions conceived by the utility model can achieve the following beneficial effects compared with the prior art:

[0018] (1) The utility model is an air tightness detection system for brake pipes and air springs of EMUs, which integrates the air tightness test functions of air springs and brake pipes, thereby improving the convenience and efficiency of the test; by integrating the various components of the air tightness test of air springs and brake pipes into a mobile trolley, the air tightness test of air springs and brake pipes can be carried out on the move, thereby achieving the convenience of measurement; by integrating the start button of the air spring air tightness test and the brake pipe air tightness test connected to the electronic control unit in the operation interface of the touch all-in-one machine, it has a one-button start function, and can display the test data and abnormal warning in real time, simplifying the user operation, so that even non-professionals can easily perform the test; the utility model is an automatic test system. The system can precisely control test conditions, such as inflation pressure and pressure holding time, and accurately record data through sensors, thereby improving the accuracy of test results; it eliminates the cumbersome steps of manual test methods, and through automated test processes, it can automatically record and automatically judge test results, significantly improving test speed and overall work efficiency; through abnormal warning and automatic shutdown functions, it can respond in time when problems are detected to prevent potential safety risks; by performing multiple test processes simultaneously, it reduces waiting time and makes the test process smoother; the comprehensive airtightness test bench of the utility model not only improves the efficiency and safety of test work, but also improves the quality of products, and provides strong technical support for the maintenance and maintenance of EMU bogies.

[0019] (2) The utility model is an air tightness detection system for EMU brake pipelines and air springs. In the air tightness test of the air spring, multiple pipelines are simultaneously tested for air tightness through one pipeline inflation pipeline and record the test data; the detection system can automatically determine the air tightness result and issue an early warning prompt in abnormal situations; the user can view the inflation time, pressure and other numerical information in real time through the operation interface, and realize efficient interaction between the user and the air tightness detection system; in the EMU brake pipeline air tightness test, the detection system can simultaneously perform air tightness tests on two brake pipelines and one balance pipeline; by clicking the inflation button, the detection system can automatically inflate and perform pressure holding tests, and automatically exhaust air after the set time is reached without manual intervention; the test system can automatically determine the air tightness result and issue an early warning prompt in abnormal situations. Automated detection reduces the intervention of human operation, thereby reducing errors caused by improper operation and improving the accuracy of test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of an air tightness detection system for brake pipes and air springs of a motor vehicle according to an embodiment of the utility model;

[0021] Figure 2This is a schematic diagram of the internal structure of an air tightness detection system for a brake pipeline and an air spring of an EMU according to an embodiment of the utility model (front view);

[0022] Figure 3 This is a schematic diagram of the internal structure of an air tightness detection system for a brake pipeline and an air spring of an EMU according to an embodiment of the utility model (rear view);

[0023] Figure 4 This is a structural schematic diagram of an air source processing unit for an air tightness detection system for a brake pipeline and an air spring of a train set according to an embodiment of the utility model.

[0024] Figure 5 The present invention is a schematic diagram of the external structure of a touch-integrated machine for an air tightness detection system for brake pipes and air springs of a motor vehicle according to an embodiment of the present invention.

[0025] In all the drawings, the same figure marks represent the same technical features, specifically: 1-mobile vehicle, 11-vehicle body, 12-wheels, 13-handrails, 2-touch all-in-one machine, 21-operation interface, 211-emergency stop button, 212-warning light, 213-reset button, 3-power supply introduction reel, 4-air tightness detection unit, 41-air source processing unit, 411-water separation filter, 412-pressure regulating valve, 413-pressure gauge, 414-pressure switch, 42-pneumatic unit, 43-test hose reel, 5-electronic control unit. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model. In addition, the technical features involved in each embodiment of the utility model described below can be combined with each other as long as they do not conflict with each other.

[0027] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, when an element is referred to as being "fixed on", "disposed on" or "provided on" another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or indirectly connected to the other element; the terms "installed", "connected", "connected" and "provided with" should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal connection of the two elements or the interaction relationship between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0028] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0029] like Figure 1-Figure 5 As shown, the utility model provides an air tightness detection system for brake pipelines and air springs of EMUs, comprising a mobile vehicle 1, a touch integrated machine 2 arranged on the mobile vehicle 1, a power supply introduction reel 3, an air tightness detection unit 4 and an electric control unit 5; wherein the touch integrated machine 2, the power supply introduction reel 3, and the air tightness detection unit 4 are respectively connected to the electric control unit 5; the air tightness detection unit 4 comprises an air source processing unit 41, at least three pneumatic units 42 connected to the air source processing unit 41, and a test hose reel 43 connected to each of the pneumatic units 42; the test hose reel 43 is connected to the tested air spring or brake pipeline through a quick connector or a special interface. A pressure sensor connected to the electric control unit is installed in the test circuit of the tested air spring or brake pipeline; a time recorder that works synchronously with the collection of the pressure sensor is connected to the electric control unit; through an automated test process, automatic recording and automatic judgment of test results are achieved, which significantly improves the test speed and overall work efficiency.

[0030] Furthermore, if Figure 1-Figure 5As shown, the power supply introduction reel 3 is used to provide power to the electronic control unit; the reel can roll up the cable so that the test equipment will not drag the loose cable when moving, avoiding damage and entanglement of the cable; the mobile vehicle 1 includes a vehicle body 11, wheels 12 arranged at the bottom of the vehicle body 11, and handrails 13 arranged on the sides of the vehicle body 11; the touch all-in-one machine 2 is arranged on the top of the vehicle body 11; the power supply introduction reel 3, the airtightness detection unit 4 and the electronic control unit 5 are arranged inside the vehicle body 11.

[0031] Furthermore, if Figure 1-Figure 5 As shown, the electronic control unit 5 serves as the brain of the entire detection system. It is connected to all components such as the touch all-in-one machine 2, the air source processing unit 41, the pneumatic unit 42, etc. through control lines to coordinate their work; the electronic control unit 5 provides power for the entire detection system; a pneumatic valve is provided between the air source processing unit 41 and the pneumatic unit 42, and the pneumatic valve can accurately control the airflow to achieve key steps such as inflation, pressure maintenance, and exhaust in the automated test process of air tightness test of air springs and brake lines; a safety valve is provided between the pneumatic unit 42 and the air spring or brake line being tested; the pneumatic valve and the safety valve both communicate with the electronic control unit 5 connected; when working, set preset parameters in the parameter setting module according to test requirements, such as inflation pressure, pressure holding time, test duration, etc.; select the type of test through the air spring air tightness test start button or the brake line air tightness test start button, and send the signal to the electronic control unit 5; after receiving the start signal, the electronic control unit 5 controls the pneumatic valve between the air source processing unit 41 and the pneumatic unit 42 to open, so that compressed air flows into the tested air spring or brake line; if the pressure of the tested air spring or brake line abnormally rises to a dangerous level, the safety valve will automatically open to release the pressure to prevent system rupture or failure.

[0032] Furthermore, if Figure 1-Figure 5 As shown, the electronic control unit 5 is connected to the air compressor, and can control the air compressor to fill the air into the air tightness detection unit 4; a pressure sensor connected to the electronic control unit 5 is installed in the test circuit of the tested air spring or brake line, which is used to monitor and record the pressure changes during the test in real time and detect whether there is a leak; the electronic control unit 5 is connected to a time recorder that works synchronously with the acquisition of the pressure sensor, which is used to record the start and end time of the test, as well as various key time points in the test process, such as the start of inflation, the start of pressure maintenance, the end of pressure maintenance, etc. In the entire air tightness test process of the present invention, the pressure and pressure maintenance time data in the tested air spring or brake line are recorded in real time by the pressure sensor and the time recorder and fed back to the electronic control unit 5.

[0033] Furthermore, if Figure 1-Figure 5As shown, the touch all-in-one machine 2 includes a central processing unit, an operation interface 21 connected to the central processing unit, an emergency stop button 211, an alarm light 212, and a reset button 213; the operation interface 21 integrates display and touch screen functions, and the user can view the inflation time, pressure and other numerical information in real time through the operation interface 21. The user can control the test process, select test items, input parameters, start and stop the test through touch operation. The central processing unit is connected to the electronic control system 5 and is used to receive and execute the instructions of the electronic control system 5; the operation interface 21 also integrates an air spring air tightness test start key, a brake pipeline air tightness test start key, an air charging button, a parameter setting module, an air tightness identification and diagnosis module, and a data storage and analysis module connected to the central processing unit; the air spring air tightness test start key, the brake pipeline air tightness test start key, the air charging button, the parameter setting module, the air tightness identification and diagnosis module, and the data storage and analysis module are all connected to the central processing unit; when working, the preset parameters of the air tightness test, such as inflation pressure, pressure holding time, test duration, etc., are set in the parameter setting module according to the test requirements, and the signal is sent to the central processing unit; the air spring air tightness test start key or the brake pipeline air tightness test start key is started, and the central processing unit sends a signal to the electronic control unit 5. After receiving the start signal, the electronic control unit 5 controls the pneumatic valve between the air source processing unit 41 and the pneumatic unit 42 to open, and presses the air charging button to start the air compressor, so that compressed air flows into the air spring being tested. spring or brake line; the pressure regulating valve adjusts the output pressure of the water separation filter 411 according to the preset parameters. After the pressure sensor in the test circuit of the tested air spring or brake line detects that the tested air spring or brake line reaches the preset inflation pressure, it feeds back the signal to the central processing unit, and the central processing unit sends the signal to the electronic control unit 5; then the electronic control unit 5 controls the pneumatic valve between the air source processing unit 41 and the pneumatic unit 42 to close; entering the pressure holding stage, the pressure sensor is used to check whether there is a pressure drop in the tested air spring or brake line. If the pressure drop exceeds the preset threshold during the pressure holding stage, the leakage rate is recorded by the data storage and analysis module; the air tightness identification and diagnosis module automatically determines whether the air tightness is qualified according to the recorded leakage rate and the preset qualified standard; if the pressure drop of the air spring or brake line is very small or within the acceptable range after being maintained under the test pressure for a period of time, it can be considered that its air tightness is good; if the pressure drop exceeds the specified range, it indicates that there is a leakage problem; after reaching the preset pressure holding time, the exhaust valve is opened to release the pressure and the test is ended.

[0034] Furthermore, if Figure 1-Figure 5As shown, the air source processing unit 41 is an important component of the pneumatic unit 42, which ensures the stability and cleanliness of the compressed air, thereby providing a high-quality air source for the pneumatic unit 42; the air source processing unit 41 includes a water separation filter 411 for filtering the compressed air, a pressure regulating valve 412, a pressure gauge 413 and a pressure switch 414 arranged at the output end of the water separation filter 411; the pressure regulating valve 412, the pressure gauge 413 and the pressure switch 414 are respectively connected to the electronic control unit 5 through pipelines and control lines, so as to realize the regulation and monitoring of the air source on the pneumatic unit 42; the compressed air after pressure regulation and monitoring by the water separation filter 411, the pressure regulating valve 412 and the pressure gauge 413 is finally output through the output pipeline It is sent to various parts of the pneumatic unit, and finally enters the test hose reel 43 connected to the air spring or brake pipeline through the pneumatic valve between the air source processing unit 41 and the pneumatic unit 42 to detect the air tightness of the air spring or brake pipeline; the pressure regulating valve 412, the pressure gauge 413 or the pressure switch 414 all have the function of outputting electrical signals, which will convert the pressure signal into an electrical signal and send it to the electronic control unit 5 for further monitoring and control; the water separation filter 411 is connected to the air compressor, and usually has one or more layers of filter material inside to capture moisture and solid particles, thereby purifying the air source; the water separation filter 411 is equipped with an automatic or manual drainage device to regularly discharge the collected moisture to ensure The filter efficiency; the pressure regulating valve 412 is used to adjust the output pressure of the water separation filter 411; the pressure gauge 413 is used to display the output pressure of the water separation filter 411; the pressure switch 414 is used to detect the output pressure of the water separation filter 411; the purified compressed air enters the pressure regulating valve 412, and the function of the pressure regulating valve 412 is to adjust the input compressed air pressure to the required working pressure. The operator can set the required pressure value by adjusting the knob or handle; the pressure gauge 413 is installed downstream of the pressure regulating valve 412 and is used to display the output pressure in real time, which allows the operator to monitor the system pressure to ensure that it is within the safety and working requirements; the pressure switch 414 is usually provided with two pressure thresholds Value: an upper limit and a lower limit. When the pressure exceeds or falls below these thresholds, the pressure switch 414 can send a signal, trigger an alarm or automatically shut down to prevent equipment damage or safety accidents; the pressure gauge is usually installed downstream of the pressure regulating valve to monitor and display the output pressure in real time; the operator can clearly see whether the compressed air pressure after pressure regulation meets the requirements; the pressure switch can be installed after the pressure gauge to monitor whether the pressure is within the preset safety range; if the pressure exceeds the set range, the pressure switch can trigger an alarm or automatically shut down to protect the safety of the system; the safety valve, as the last line of defense, is usually installed after the pressure switch. If the system pressure abnormally rises to a dangerous level, the safety valve will open to release the pressure.

[0035] The utility model provides an air tightness detection system for brake pipelines and air springs of EMUs, which connects each pneumatic unit 42 with the air spring or brake pipeline; sets preset parameters of the air tightness test in the parameter setting module according to the test requirements, such as inflation pressure, pressure holding time, test duration, etc.; starts the air spring air tightness test start button or the brake pipeline air tightness test start button, and sends a signal to the electronic control unit 5. After receiving the start signal, the electronic control unit 5 controls the pneumatic valves between the air source processing unit 41 and each pneumatic unit 42 to open, presses the air charging button, starts the air compressor to make compressed air flow into the tested air spring or brake pipeline; the pressure regulating valve adjusts the output pressure of the water separation filter 411 according to the preset parameters, and the pressure sensor in the test circuit of the tested air spring or brake pipeline detects that the tested air spring or brake pipeline reaches the preset inflation pressure, and then feeds back the signal to the electronic control unit 5; then the electronic control unit 5 controls the pneumatic valve between the air source processing unit 41 and the pneumatic unit 42 to close; enters the pressure holding stage, and the pressure sensor is used to control the pressure of the air spring or brake pipeline to enter the pressure holding stage. The sensor checks whether there is a pressure drop in the tested air spring or brake line. If the pressure drop exceeds the preset threshold during the pressure holding stage, the leakage rate is recorded by the data storage and analysis module; the air tightness identification and diagnosis module automatically determines whether the air tightness is qualified based on the recorded leakage rate and the preset qualification standard; if the pressure drop of the air spring or brake line is very small or within an acceptable range after being maintained under the test pressure for a period of time, it can be considered that its air tightness is good; if the pressure drop exceeds the specified range, it indicates that there is a leakage problem; after the preset pressure holding time is reached, the exhaust valve is opened to release the pressure and the test is ended; if the pressure of the air spring or brake line exceeds the set range, the pressure switch can trigger the alarm light 212 to issue a warning, the detection system automatically shuts down or the emergency stop button 211 is used to control the detection system to stop working; if the pressure of the air spring or brake line abnormally rises to a dangerous level, the electronic control unit 5 will control the safety valve to open and release the pressure to protect the safe use of the detection system; after the fault is eliminated, the reset button 213 is activated to resume the air tightness test process.

[0036] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. An air tightness detection system for brake pipes and air springs of EMUs, characterized in that: The invention comprises a mobile vehicle (1), a touch integrated machine (2) arranged on the mobile vehicle (1), a power supply introduction reel (3), an airtightness detection unit (4) and an electric control unit (5); wherein the touch integrated machine (2), the power supply introduction reel (3) and the airtightness detection unit (4) are respectively connected to the electric control unit (5); The air tightness detection unit (4) comprises an air source processing unit (41), at least three pneumatic units (42) connected to the air source processing unit (41), and a test hose reel (43) connected to each of the pneumatic units (42); The test hose reel (43) is connected to the air spring or brake pipeline to be tested; The electronic control unit (5) is connected to an air compressor; a pressure sensor connected to the electronic control unit (5) is installed in a test circuit of the air spring or brake pipeline being tested; and a time recorder is connected to the electronic control unit (5) and works synchronously with the pressure sensor; The touch all-in-one machine (2) comprises an operation interface (21), an emergency stop button (211), an alarm light (212) and a reset button (213); a central processing unit connected to the operation interface (21), and the emergency stop button (211), the alarm light (212) and the reset button (213) arranged on the side of the operation interface (21).

2. The air tightness detection system for brake pipes and air springs of a train set according to claim 1, characterized in that: The air source processing unit (41) comprises a water separation filter (411) for filtering compressed air, a pressure regulating valve (412) provided at the output end of the water separation filter (411), a pressure gauge (413), and a pressure switch (414).

3. The air tightness detection system for brake pipes and air springs of a train set according to claim 2, characterized in that: The pressure regulating valve (412), the pressure gauge (413) and the pressure switch (414) are respectively connected to the electronic control unit (5).

4. An air tightness detection system for brake pipes and air springs of a train set according to any one of claims 1 to 3, characterized in that: A pneumatic valve is provided between the air source processing unit (41) and the pneumatic unit (42).

5. An air tightness detection system for brake pipes and air springs of a train set according to any one of claims 1 to 3, characterized in that: A safety valve is provided between the pneumatic unit (42) and the air spring or brake pipeline being tested.

6. An air tightness detection system for brake pipes and air springs of a train set according to any one of claims 1 to 3, characterized in that: The mobile vehicle (1) comprises a vehicle body (11), running wheels (12) arranged at the bottom of the vehicle body (11), and handrails (13) arranged at the sides of the vehicle body (11).

7. The air tightness detection system for brake pipes and air springs of a train set according to claim 6 is characterized in that: The touch integrated machine (2) is arranged on the top of the vehicle body (11); the power supply introduction reel (3), the air tightness detection unit (4), the electric control unit (5) and the parts storage area (6) are arranged inside the vehicle body (11).

8. An air tightness detection system for brake pipes and air springs of a train set according to any one of claims 1 to 3, characterized in that: The operation interface (21) is also integrated with an air spring air tightness test start key connected to the central processing unit, a brake pipeline air tightness test start key, an air charging button, a parameter setting module, an air tightness identification and diagnosis module, and a data storage and analysis module.

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