Under-vehicle brake pipeline teaching system and use method thereof

Abstract

The invention discloses an under-vehicle brake pipeline teaching system and a use method thereof, and belongs to the technical field of railway vehicles. The problem that in the prior art, whether the end of a pipeline abuts against the joint body or not cannot be detected, and consequently the training effect evaluation effect is poor is solved. The lower surface structure of a supporting plate is the same as that of a vehicle bottom plate, the lower surface of the supporting plate is connected with a bogie, and brake pipelines are arranged on the lower surface of the supporting plate and the bogie; a boss used for making contact with the end face of a pipeline is arranged on a connector body of a ferrule type pipe connector in the brake pipeline, a through groove is formed in the contact face, making contact with the pipeline, of the boss, a piston is slidably arranged in the through groove and connected with a piston rod, and the side, away from the piston rod, of the through groove is connected with a first gas channel. The first gas channel is connected with an air bag arranged outside the connector body. The assembly effect of the brake pipeline can be visually judged, the method is simple and clear, the cost is low, and normal assembly of the brake pipeline cannot be affected.

Description

Technical Field

[0001] The invention belongs to the technical field of rail vehicles, and in particular relates to an under-vehicle brake pipeline teaching system and a use method thereof. Background Art

[0002] The braking performance of subway vehicles guarantees the safety of train operation, and the quality of the brake pipeline assembly procedure will directly affect whether the brake system can operate stably and effectively. In order to ensure the airtightness of the brake pipeline, a ferrule-type pipe joint is generally used to connect the pipeline. Whether the ferrule-type pipe joint is correctly installed will directly affect the airtightness of the pipeline. When using a ferrule-type pipe joint, first tighten the end of the pipeline into the installation joint body to ensure that the pipe section is in contact with the pre-installed joint body, and then screw the nut into the pre-installed joint and tighten it.

[0003] Since the assembly of brake lines is very delicate, beginners generally need to undergo theoretical training first and then conduct hands-on training on brake line assembly through existing vehicles. Although assembly training through existing vehicles highly restores the actual scene of real assembly, which is conducive to improving the training effect, if assembly training is conducted through existing vehicles, the brake lines of existing vehicles need to be repeatedly disassembled and installed, which has a certain impact on the quality of existing vehicles. In addition, in the prior art, after the trainees finish the assembly, a certain pressure of gas is generally introduced into one end of the pipeline, and then the gas pressure is detected at the other end of the pipeline. If the gas pressure loss is within the set range, it means that there is no leakage and the assembly is successful; if the gas pressure loss is greater than the set value, it means that the assembly does not meet the requirements. Therefore, the prior art can only judge the air tightness of the pipeline as a whole. If the trainees do not first tighten the end of the pipeline into the installation joint body when using the ferrule-type pipe joint, although it will not cause obvious leakage at the time, it will also affect the long-term use of the brake line. Therefore, not tightening the end of the pipeline into the installation joint body first does not meet the assembly requirements, but the prior art cannot detect this process. Summary of the invention

[0004] In view of the problem in the prior art that it is impossible to detect whether the pipe end is tightly pressed against the joint body during the brake pipe assembly training, resulting in poor training effect evaluation, the present invention provides an under-vehicle brake pipe teaching system and a use method thereof.

[0005] The technical solution adopted by the present invention is as follows:

[0006] A vehicle brake line teaching system comprises a support frame, the support frame comprises a support plate and support legs, the lower surface structure of the support plate is the same as the vehicle floor structure, the lower surface of the support plate is connected to a bogie, and brake lines are arranged on the lower surface of the support plate and the bogie;

[0007] The brake pipeline includes various ferrule-type pipe joints for connecting pipelines to pipelines or pipelines to brake equipment;

[0008] The ferrule type pipe joint comprises a joint body, a ferrule and a nut;

[0009] The joint body is provided with a boss for contacting the end face of the pipeline, and the contact surface of the boss contacting the pipeline is provided with a through groove, a piston is slidably arranged in the through groove, and the piston is connected to a piston rod. The side of the through groove away from the piston rod is connected to a first gas channel, and the first gas channel is connected to an air bag arranged outside the joint body.

[0010] After adopting this technical solution, the present invention changes the existing method of conducting brake line assembly training directly on the existing vehicle. A support frame is set according to the structure of the existing vehicle, and a bogie is connected to the support frame to simulate the structure of a real rail vehicle, which ensures the training effect and will not affect the existing vehicle. Secondly, in order to further evaluate whether the assembly of the brake line meets the requirements, the present invention provides a through groove with a piston on the joint body. When the pipeline is inserted, the pipeline squeezes the piston inward, thereby squeezing the gas in the through groove into the airbag to expand the airbag. If the end of the pipeline does not abut against the boss, the airbag cannot expand to the set size. Therefore, the examiner can directly judge whether the operator has contacted the end of the pipeline with the boss as required based on the degree of expansion of the airbag. This method can judge the assembly effect of the brake line very intuitively. It is simple and clear, low-cost, and will not affect the normal assembly of the brake line.

[0011] Preferably, the airbag is also connected to a second gas channel, the ferrule extrusion pipe forms a sealing groove, the second gas channel is connected to the sealing groove, and a gas stop valve is provided on the second gas channel.

[0012] After adopting this technical solution, it is difficult for beginners to grasp the degree of rotating the nut, so it is easy to cause excessive clamping of the ferrule, resulting in damage to the pipeline and air leakage, which is one of the main causes of pipeline leakage. In the prior art, if you want to further know where the leak is, you need to detect it by applying soapy water. This process is time-consuming and laborious, and it is impossible to directly know the leak location, which affects the teaching effect. At the same time, after knowing the leak location, you also need to disassemble the pipeline to know the cause of the leak; in the present invention, a second gas channel is set to connect the airbag with the sealing groove formed by the clamping joint of the ferrule. When the air stop valve is opened, if the clamping joint of the ferrule is damaged or the clamping joint of the ferrule is not tightly connected to the pipeline, the airbag will be deflated, indicating that the connection of the ferrule-type pipe joint here is incorrect. The operator can recall the assembly process of the ferrule-type pipe joint here to summarize the cause of the failure; if the airbag does not deflate, it means that the airtightness here is good, and there may be cracks in the pipeline itself. Therefore, the airbag can not only determine whether the pipeline is inserted into the bottom of the joint body, but also effectively improve the efficiency of finding the leaking part and the cause of the leak, thereby improving the teaching effect.

[0013] Preferably, one end of the piston rod is connected to a limiting block, the joint body is provided with a limiting groove cooperating with the limiting block, a first sealing gasket is provided in the limiting groove, a second sealing gasket is provided at the contact point between the boss and the end face of the pipe, and the first sealing gasket is seamlessly connected to the second sealing gasket.

[0014] After adopting this technical solution, the second sealing gasket and the first sealing gasket cooperate to improve the connection tightness between the pipeline end face and the joint body, and further make the sealing groove present a sealed state.

[0015] Preferably, an openable and closable shielding cover is provided outside the airbag.

[0016] After adopting this technical solution, since there is no air bag to judge whether the pipe is inserted to the bottom of the joint body during the actual assembly process, the shielding cover can be closed during the actual assessment to prevent the operator from judging whether it is inserted to the bottom based on the air bag, which is closer to the actual assembly process; and during daily training, the air bag can be used to judge whether the pipe is inserted to the bottom to train the hand feel.

[0017] In addition, whether the airbag is inflated to the right position can be judged by whether there is contact between the airbag and the shielding cover. During the test, the shielding cover is closed. When the test is completed, the shielding cover is opened to judge whether the test is qualified by whether there is contact between the airbag and the shielding cover.

[0018] Preferably, a pressure sensor is provided on the inner surface of the shielding cover, and the pressure sensor is electrically connected to a control system.

[0019] After adopting this technical solution, since there are multiple ferrule-type pipe joints in the brake line, it is not objective and troublesome to observe the expansion state of the airbag with the naked eye. Therefore, a pressure sensor is directly set in the shielding cover. The airbag can only contact the pressure sensor when it expands to a set degree, causing the pressure value to change. The control system can analyze the pressure value detected by the pressure sensor to determine whether the airbag has expanded to the set range, thereby improving the evaluation efficiency of the brake line assembly.

[0020] Preferably, a spring is provided on a side of the piston close to the first gas channel.

[0021] After adopting this technical solution, since the teaching system is used repeatedly, a spring is provided to push the piston to reset after the pipeline is disassembled, so as to facilitate the next assembly.

[0022] A method for using an under-vehicle brake pipe teaching system is provided, and the method comprises the following steps:

[0023] Step 1: The operator assembles the brake lines on the support plate and bogie;

[0024] Step 2: The examiner determines whether the pipe is in contact with the boss on the joint body according to the expansion degree of the airbags on each ferrule-type pipe joint. If all the airbags are expanded to the set size, it means that the pipe is in contact with the boss on the joint body, and then proceed to step 3. If at least one airbag does not expand to the set range, it means that the pipe is not in contact with the boss on the joint body, and then the assessment is judged to have failed, and then proceed to step 3 or directly end the assessment;

[0025] Step 3: Introduce gas into one end of the connected brake pipe, detect the gas pressure at the other end of the brake pipe, and obtain the air pressure loss. If the air pressure loss is within the set range, it means that the air tightness meets the requirements. If the air pressure loss is not within the set range, it means that the air tightness does not meet the requirements.

[0026] Preferably, the airbag is further connected to a second gas channel, the ferrule extrusion pipeline forms a sealing groove, the second gas channel is connected to the sealing groove, and a gas stop valve is provided on the second gas channel;

[0027] The method further includes step 4, wherein the specific steps of step 4 are as follows: when the air tightness does not meet the requirements, each air stop valve is opened, and if there is air leakage from the air bag, it indicates that the ferrule connection of the pipeline is damaged or not tightly connected.

[0028] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0029] 1. The present invention changes the existing method of conducting brake line assembly training directly on the existing vehicle. A support frame is set according to the structure of the existing vehicle, and a bogie is connected to the support frame to simulate the structure of a real rail vehicle, which ensures the training effect and will not affect the existing vehicle.

[0030] 2. In order to further evaluate whether the assembly of the brake line meets the requirements, the present invention provides a through groove with a piston on the joint body. When the pipe is inserted, the pipe squeezes the piston inward, thereby squeezing the gas in the through groove into the airbag to expand the airbag. If the end of the pipe does not abut against the boss, the airbag cannot expand to the set size. Therefore, the examiner can directly judge whether the operator has contacted the end of the pipe with the boss as required based on the degree of expansion of the airbag. This method can very intuitively judge the assembly effect of the brake line, is simple and clear, has low cost, and will not affect the normal assembly of the brake line.

[0031] 3. In the present invention, a second gas channel is provided to connect the airbag with the sealing groove formed at the ferrule joint. When the air stop valve is opened, if the ferrule joint is damaged or the ferrule joint is not tightly connected to the pipeline, the airbag will deflate, indicating that the ferrule pipe joint here is incorrectly connected. The operator can recall the assembly process of the ferrule pipe joint here to summarize the cause of the failure; if the airbag does not deflate, it means that the airtightness here is good, and there may be cracks in the pipeline itself. Therefore, the airbag can not only determine whether the pipeline is inserted into the bottom of the joint body, but also effectively improve the efficiency of finding the leakage location and the cause of the leakage, thereby improving the teaching effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of the present invention;

[0033] Figure 2 It is a structural schematic diagram of the ferrule type pipe joint of the present invention when the ferrule is not engaged;

[0034] Figure 3 for Figure 2 The structural diagram at A in the middle;

[0035] Figure 4 It is a structural schematic diagram of the ferrule type pipe joint in the present invention when the ferrule is clamped;

[0036] Figure 5 for Figure 4 Schematic diagram of the structure at B in the middle;

[0037] Figure 6 It is a schematic diagram of the structure when a shielding cover is provided in the present invention;

[0038] Among them, 1-support plate, 2-support leg, 3-brake pipeline, 4-bogie, 5-nut, 6-ferrule, 7-connector body, 8-second gas channel, 9-stop valve, 10-air bag, 11-first gas channel, 12-piston, 13-piston rod, 14-spring, 15-sealing groove, 16-shielding cover. DETAILED DESCRIPTION

[0039] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0040] In the description of the embodiments of the present application, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or are the positions or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0041] Example 1

[0042] A vehicle brake line teaching system comprises a support frame, the support frame comprises a support plate 1 and a support leg 2, the lower surface structure of the support plate 1 is the same as the vehicle floor structure, the lower surface of the support plate 1 is connected to a bogie 4, and a brake line 3 is arranged on the lower surface of the support plate 1 and the bogie 4;

[0043] The brake pipeline 3 includes various ferrule-type pipe joints for connecting pipelines to pipelines or pipelines to brake equipment;

[0044] The ferrule type pipe joint comprises a joint body 7, a ferrule 6 and a nut 5;

[0045] The joint body 7 is provided with a boss for contacting the end face of the pipeline, and a through groove is provided on the contact surface of the boss contacting the pipeline. A piston 12 is slidably arranged in the through groove, and the piston 12 is connected to a piston rod 13. The side of the through groove away from the piston rod 13 is connected to a first gas channel 11, and the first gas channel 11 is connected to an air bag 10 arranged outside the joint body 7.

[0046] In this embodiment, the structure related to the brake line on the bogie 4 is the same as the structure, position and size of the existing vehicle, and irrelevant structures may not be provided to reduce the manufacturing cost of the teaching system.

[0047] In this embodiment, the airbag 10 is an elastic airbag that can expand as the gas increases.

[0048] Example 2

[0049] This embodiment is basically the same as the embodiment 1, except that: the airbag 10 is also connected to the second gas channel 8, the ferrule 6 squeezes the pipeline to form a sealing groove 15, the second gas channel 8 is connected to the sealing groove 15, and the second gas channel 8 is provided with a stop valve 9. The second gas channel 8 is partially arranged in the connector body 7, and the other part is arranged outside the connector body 7. The stop valve 9 is arranged on the second gas channel 8 arranged outside. The structure of the stop valve 9 is the same as the structure of the flow regulating valve during infusion, and the second gas channel 8 can be opened or closed by the stop valve. One end of the piston rod 13 is connected to a limiting block, and a limiting groove cooperating with the limiting block is arranged on the connector body 7. A first sealing gasket is arranged in the limiting groove, and a second sealing gasket is arranged at the contact point between the boss and the end face of the pipeline, and the first sealing gasket and the second sealing gasket are seamlessly connected. The second gas channel 8 is set to connect the airbag 10 with the sealing groove 15 formed at the clamping point of the ferrule 6. When the air stop valve 9 is opened, if the clamping contact of the ferrule 6 is damaged or the clamping point of the ferrule 6 is not tightly connected to the pipeline, the airbag will be deflated, which means that the connection of the ferrule type pipe joint here is incorrect. The operator can recall the assembly process of the ferrule type pipe joint here to summarize the cause of the failure; if the airbag 10 does not deflate, it means that the airtightness here is good, and there may be cracks in the pipeline itself. Therefore, the airbag 10 can not only determine whether the pipeline is inserted into the bottom of the joint body, but also effectively improve the efficiency of finding the leakage location and the cause of the leakage, thereby improving the teaching effect.

[0050] Example 3

[0051] This embodiment is basically the same as embodiment 2, except that: Figure 6As shown, the airbag 10 is provided with an openable and closable shielding cover 16 on the outside, and a through slot is provided on the shielding cover 16 for allowing the second gas channel 8 to extend from the shielding cover, and the second gas channel 8 extends from the through slot. The shielding cover 16 is made of black opaque plastic material, which is light in weight and can cover the airbag 10 therein. One end of the shielding cover 16 is hinged to the joint body 7, and a clamp is provided at the other end. A clamping slot that cooperates with the clamp is provided on the joint body 7, and the closing of the shielding cover 16 is achieved by the clamping slot and the clamping slot. In other embodiments, the shielding cover 16 can also be made of other opaque materials as long as it can play a shielding role.

[0052] Example 4

[0053] This embodiment is basically the same as the embodiment 3, except that: in this embodiment, a pressure sensor is provided on the inner surface of the shielding cover 16, and the pressure sensor is electrically connected to a control system. Since there are multiple ferrule-type pipe joints in the brake pipe 3, it is not objective and troublesome to observe the expansion state of the airbag with the naked eye. Therefore, a pressure sensor is directly provided in the shielding cover 16. When the airbag expands to a set degree, it can contact the pressure sensor to cause a pressure value change. The control system can analyze the pressure value detected by the pressure sensor to determine whether the airbag expands to a set range, thereby improving the evaluation efficiency of the brake pipe assembly.

[0054] Example 5

[0055] A method for using an under-vehicle brake line teaching system is provided, using the under-vehicle brake line teaching system described in Example 4, and includes the following steps:

[0056] Daily training:

[0057] Step 1: During daily training, the operator assembles the brake pipe 3 on the support plate 1 and the bogie 4 according to the theoretical training content. During assembly, the end of the pipe is inserted into the bottom of the joint body 7, and it is judged whether the end face of the pipe is abutted against the boss according to the expansion state of the airbag 10 to train the hand feeling. When the end face of the pipe is abutted against the boss, the nut 5 is rotated according to the requirements to make the ferrule 6 inserted into the pipe;

[0058] Step 2: Open the air stop valve 9 and check whether the air bag 10 is deflated. If deflated, it means that the clamping joint of the ferrule 6 of the pipeline is damaged or not tightly connected. In this case, adjust the assembly process and replace the pipeline for the next training.

[0059] Training results assessment:

[0060] Step 1: With the shielding cover 16 covering the airbag 10, the operator assembles the brake pipe 3 on the support plate 1 and the bogie 4 according to the theoretical training content;

[0061] Step 2: The examiner determines whether the airbag 10 is in contact with the boss on the joint body 7 according to the pressure values ​​of each pressure sensor obtained by the control system. If all the airbags 10 are expanded to the set size, it means that the pipeline is in contact with the boss on the joint body 7, and then proceed to step 3. If at least one airbag 10 is not expanded to the set range, it means that the pipeline is not in contact with the boss on the joint body 7, and then the assessment is judged to have failed, and then proceed to step 3 or directly end the assessment;

[0062] Step 3: Introduce gas into one end of the connected brake pipe 3, detect the gas pressure at the other end of the brake pipe 3, and obtain the loss of gas pressure. If the loss of gas pressure is within the set range, it means that the air tightness meets the requirements. If the loss of gas pressure is not within the set range, it means that the air tightness does not meet the requirements.

[0063] Step 4: When the air tightness does not meet the requirements, open each air stop valve 9. If there is air leakage from the air bag 10, it means that the clamping part of the ferrule 6 of the pipeline at that place is damaged or the connection is not tight.

[0064] In other embodiments, the air stop valve 9 can also be set as an electric valve, and the opening of each air stop valve 9 can be controlled by a control system, and the pressure change can be monitored in real time by a pressure sensor. If the pressure monitored by the pressure sensor becomes smaller after the air stop valve 9 is opened, it indicates a leak. If the detected pressure hardly changes, it indicates that the air tightness is good, so as to realize automatic monitoring of the leaking part and save manpower.

[0065] The above-mentioned embodiments only express the specific implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the protection scope of the present application. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the technical solution concept of the present application, and these all belong to the protection scope of the present application.

Claims

1. A vehicle brake line teaching system, characterized by: The vehicle comprises a support frame, wherein the support frame comprises a support plate (1) and a support leg (2); the lower surface structure of the support plate (1) is the same as the vehicle floor structure; the lower surface of the support plate (1) is connected to a bogie (4); and a brake pipeline (3) is arranged on the lower surface of the support plate (1) and the bogie (4); The brake pipeline (3) comprises various ferrule-type pipe joints for connecting pipelines to pipelines or pipelines to brake equipment; The ferrule-type pipe joint comprises a joint body (7), a ferrule (6) and a nut (5); The connector body (7) is provided with a boss for contacting the end face of a pipeline, a through groove is provided on the contact surface of the boss contacting the pipeline, a piston (12) is slidably arranged in the through groove, the piston (12) is connected to a piston rod (13), a side of the through groove away from the piston rod (13) is connected to a first gas channel (11), and the first gas channel (11) is connected to an air bag (10) arranged outside the connector body (7).

2. The under-vehicle brake line teaching system according to claim 1, characterized in that: The air bag (10) is also connected to a second gas channel (8), the ferrule (6) extrude the pipeline to form a sealing groove (15), the second gas channel (8) is communicated with the sealing groove (15), and a gas stop valve (9) is provided on the second gas channel (8).

3. The under-vehicle brake line teaching system according to claim 2, characterized in that: One end of the piston rod (13) is connected to a limiting block, the joint body (7) is provided with a limiting groove cooperating with the limiting block, a first sealing gasket is provided in the limiting groove, a second sealing gasket is provided at the contact point between the boss and the end face of the pipe, and the first sealing gasket and the second sealing gasket are seamlessly connected.

4. The under-vehicle brake line teaching system according to claim 1, characterized in that: An openable and closable shielding cover (16) is arranged outside the airbag (10).

5. The under-vehicle brake line teaching system according to claim 4, characterized in that: The inner surface of the shielding cover (16) is provided with a pressure sensor, and the pressure sensor is electrically connected to a control system.

6. The under-vehicle brake line teaching system according to claim 1, characterized in that: A spring (14) is provided on one side of the piston (12) close to the first gas channel (11).

7. A method for using an under-vehicle brake line teaching system, characterized in that: The method is carried out using the under-vehicle brake line teaching system according to any one of claims 1 to 6, comprising the following steps: Step 1: An operator assembles the brake pipeline (3) on the support plate (1) and the bogie (4); Step 2: The examiner determines whether the pipe is in contact with the boss on the joint body (7) according to the expansion degree of the airbags (10) on each ferrule-type pipe joint. If all the airbags (10) are expanded to a set size, it means that the pipe is in contact with the boss on the joint body (7), and then the process proceeds to step 3. If at least one airbag (10) is not expanded to a set range, it means that the pipe is not in contact with the boss on the joint body (7), and then the examination is judged to have failed. Then the process proceeds to step 3 or the examination evaluation is terminated directly. Step 3: Introduce gas into one end of the connected brake pipe (3), detect the gas pressure at the other end of the brake pipe (3), and obtain the loss of gas pressure. If the loss of gas pressure is within the set range, it means that the air tightness meets the requirements; if the loss of gas pressure is not within the set range, it means that the air tightness does not meet the requirements.

8. The method for using the under-vehicle brake line teaching system according to claim 7 is characterized in that: The air bag (10) is also connected to a second gas channel (8), the ferrule (6) squeezes the pipeline to form a sealing groove (15), the second gas channel (8) is communicated with the sealing groove (15), and a gas stop valve (9) is provided on the second gas channel (8); The method further comprises step 4, wherein the specific steps of step 4 are as follows: when the air tightness does not meet the requirements, each air stop valve (9) is opened, and if there is air leakage from the air bag (10), it indicates that the clamping part of the clamping sleeve (6) of the pipeline at that location is damaged or the connection is not tight.

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