A pantograph air path sealing detection device

Abstract

The utility model discloses a kind of pantograph gas path leakproofness detection device, including, detection end, detection end includes shell, detection probe is loaded in shell, detection probe bottom embeddedly is equipped with pressure sensor, detection probe top is fixedly connected with display end, the side not being equipped with display screen of display end is fixedly connected with control box, controller is loaded in control box, controller is connected with display end and pressure sensor respectively by wire;Test end, test end includes box body, box body is fixedly connected with gas holder in, the air inlet end of gas holder is connected with micro air pump by gas pipe, the air inlet end of micro air pump is fixedly connected with air inlet pipe, the air outlet end of gas holder is communicated with air outlet pipe;Through the pressure sensor of detection end, gas path pressure change is sensed in real time, the change of pressure value directly reflects gas path leakproofness (such as pressure continues to drop, then it is explained that air leakage), detection result is objective, quantization, avoid the error caused by subjective judgment, significantly improve detection accuracy.

Description

Technical Field

[0001] This utility model relates to the field of pantograph air circuit detection technology, and in particular to a pantograph air circuit sealing detection device. Background Technology

[0002] As a key electrical device for electric locomotives to obtain power from the overhead contact line, the pantograph's normal operation is crucial for the safe and stable operation of the locomotive. The pantograph's sliding plate contains an air chamber, which is connected to relevant pneumatic valves and other components via air passages. The pantograph's raising or lowering is achieved by the injection or release of compressed air. However, after the locomotive has been in operation for a period of time, the pantograph's sliding plate may crack due to breakage or wear, leading to air leakage. Air leakage may also occur at loose air passage connections. These air leaks can cause poor contact between the pantograph and the overhead contact line, seriously affecting the pantograph's use and even endangering train safety.

[0003] Currently, the airtightness testing of pantograph contact plates and related air lines on operating locomotives and rolling stock is mostly done manually. Inspectors must climb onto the top of the locomotive, apply soapy water to the contact plates and air line joints, and then visually inspect for bubbles and their quantity to determine if there is a leak and its severity. This traditional method has many drawbacks. For example, it relies entirely on visual inspection, requiring inspectors to check from multiple angles, which is time-consuming and inefficient. Furthermore, the results are easily influenced by the inspector's subjective factors, making accuracy difficult to guarantee. Utility Model Content

[0004] This application provides a pantograph gas circuit sealing detection device. The device uses a pressure sensor at the detection end to sense changes in gas circuit pressure in real time. The pressure change directly reflects the gas circuit sealing (if the pressure continues to drop, it indicates a leak). The detection results are objective and quantitative, avoiding errors caused by subjective judgment and significantly improving detection accuracy.

[0005] This application provides a pantograph gas circuit sealing detection device, including,

[0006] The detection end includes a housing containing a detection probe. The detection probe has a hollow structure with a pressure sensor embedded in its bottom. A display end is fixedly connected to the top of the detection probe, located on the outer top of the housing. A control box is fixedly connected to the side of the display end without a display screen. The control box contains a controller, which is connected to the display end and the pressure sensor via wires. A battery pack is also contained within the control box and connected to the controller via wires. A control switch is mounted on the outer wall of the control box and connected to both the battery pack and the controller via wires. A USB charging switch is pre-installed on the wall of the control box for charging the battery pack.

[0007] The test end includes a box, inside which a gas tank is fixedly connected. The gas tank's inlet is connected to a miniature air pump via an air pipe. The side of the miniature air pump away from the gas tank is fixedly connected to the inner wall of the box. The inlet of the miniature air pump is fixedly connected to an inlet pipe, which passes through the box and communicates with the outside air. The gas tank's outlet is connected to an outlet pipe, which passes through the box and communicates with the test end.

[0008] Furthermore, connecting pipe 1, connecting pipe 2 and connecting pipe 3 are fixedly connected to the housing respectively. Connecting pipe 2 is equipped with a manual control valve. Connecting pipe 1 and 2 are used to connect to the test interface of the pantograph air circuit. Connecting pipe 3 is used to connect to the air outlet pipe of the test end.

[0009] Furthermore, the gas storage tank is equipped with a regulating valve at the outlet, a pressure relief valve and a venting end at the top, a manual control valve at the venting end, and a pressure gauge on the outer wall of the top of the gas storage tank.

[0010] The box is further equipped with a lid on top, which is connected to the box body by a hinge. The lid and the box body are locked together by a latch. U-shaped buckles are fixed to the outer walls on both sides of the lid, and the carrying strap can be fastened through the U-shaped buckles on both sides.

[0011] A filter screen is fixedly connected to the outer side of the box wall on the side of the box body that extends through the air inlet pipe. A vent hole is opened on the box cover, and a filter screen is also installed at the position of the vent hole on the box cover. The filter screen is fixedly connected to the outer wall of the top of the box cover.

[0012] The box is further equipped with a second battery pack, which is connected to a micro air pump via wires. The outer wall of the box is equipped with a second control switch, which is connected to the second battery pack and the micro air pump via wires. A USB charging switch is provided on the box wall for charging the second battery pack later.

[0013] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0014] 1. The pressure sensor at the detection end senses changes in the gas path pressure in real time. After converting the pressure signal into an electrical signal, it is processed by the controller and displayed intuitively as a numerical value. Changes in the pressure value directly reflect the gas path sealing performance (for example, a continuous drop in pressure indicates a leak). The detection results are objective and quantitative, avoiding errors caused by subjective judgment and significantly improving detection accuracy.

[0015] 2. A stable air source is formed by the miniature air pump and air tank at the test end, which can quickly form a closed loop with the pantograph air circuit; during the pressure holding stage, the pressure sensor monitors in real time, and the staff does not need to observe continuously. They only need to judge the sealing performance by observing the changes in the values ​​on the display end, which greatly reduces the manual operation steps and observation time and significantly improves the testing efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram showing the connection between the detection end and the testing end in this application. Figure 1 ;

[0017] Figure 2 This is a schematic diagram showing the connection between the detection end and the testing end in this application. Figure 2 ;

[0018] Figure 3 This is a schematic diagram showing the separation of the detection end and the testing end in this application;

[0019] Figure 4 This is a schematic diagram of the internal structure of the box in this application;

[0020] Figure 5 This is a schematic diagram of the air circuit connecting the detection end and the test end of this application to the pantograph;

[0021] Figure 6 This is a main view of the gas circuit connecting the detection end and the test end of this application to the pantograph.

[0022] In the diagram: 10 Housing, 11 Connecting pipe one, 12 Connecting pipe two, 13 Connecting pipe three, 20 Display terminal, 21 Control box, 22 Detection probe, 30 Box body, 31 Air outlet pipe, 32 Box cover, 33 Air inlet pipe, 34 Filter screen, 35 U-shaped buckle, 36 Miniature air pump, 37 Air storage tank, 38 Air release end, 39 Pressure relief valve, 310 Pressure gauge. Detailed Implementation

[0023] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0024] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0026] Example 1

[0027] Please see Figure 1-6 A pantograph gas circuit sealing test device includes a detection end and a test end connected to the detection end;

[0028] Specifically, the detection end includes a housing 10, which is made of high-strength insulating plastic (such as ABS material). Inside the housing 10 is a detection probe 22, a hollow structure with a pressure sensor embedded at its bottom. The pressure sensor is fixed to the inner wall of the detection probe 22 with sealant to prevent gas leakage from affecting detection accuracy. The pressure sensor is a silicon-type pressure sensor (the measurement range can be set according to the actual working pressure of the pantograph's gas path), ensuring it can capture minute pressure changes for sensing pressure variations in the gas path. A display end 20 is fixedly connected to the top of the detection probe 22, located on the outer top of the housing 10. This display end shows the pressure values, allowing operators to easily judge pressure changes in the gas path. The display end 20 uses an LCD screen. A control box 21 is fixedly connected to the side of the display end 20 without the display screen. The control box 21 contains a controller, which serves as the main control unit and uses an STM32 microcontroller. The series of microcontrollers (such as STM32F103) have the characteristics of fast data processing speed and low power consumption. They are connected to the display terminal 20 and the pressure sensor respectively through wires. The pressure sensor converts the detected changes in the air path into electrical signals and transmits them to the controller. The controller converts the received electrical signals into values ​​and displays them on the display terminal 20 in real time.

[0029] The test unit includes a housing 30, with a lid 32 on top. The lid 32 is hinged to the housing 31. Both the housing 30 and lid 32 are made of aluminum alloy. A gas tank 37 is fixedly connected inside the housing 30. The gas tank 37 is a cylindrical aluminum alloy tank (approximately 2L in volume). The gas inlet of the gas tank 37 is connected to a miniature air pump 36 via an air pipe (a one-way valve is installed at the connection between the gas inlet of the gas tank 37 and the miniature air pump 36 to prevent backflow). The miniature air pump 36 is located away from the gas tank 31. One side of the gas tank 37 is fixedly connected to the inner wall of the housing 30. The air inlet end of the micro air pump 36 is fixedly connected to the air inlet pipe 33. The air inlet pipe 33 passes through the housing 30 and communicates with the outside air. The air outlet end of the gas tank 37 is connected to the air outlet pipe 31. The air outlet pipe 31 passes through the housing 30 and communicates with the detection end. The air outlet pipe 31 is a high-pressure braided tube with a certain length reserved to facilitate long-distance connection between the detection end and the test end on the top of the locomotive. The air outlet end of the gas tank 37 is equipped with a regulating valve to adjust the output pressure and ensure that the pressure entering the pantograph air circuit is stable.

[0030] The control box 21 contains a battery pack (which can be a 12V rechargeable lithium battery with a capacity of 2000mAh). The battery pack is connected to the controller via wires to provide power to the controller and other electrical components. The outer wall of the control box 21 is equipped with a control switch, which is connected to the battery pack and the controller via wires. A USB charging switch is reserved on the wall of the control box 21 for charging the battery pack later.

[0031] The housing 10 is fixedly connected to connecting pipe 11, connecting pipe 2 12, and connecting pipe 3 13. Connecting pipes 1, 2, and 3 are all made of pressure-resistant PU tubing and equipped with standard quick-connect fittings (such as pagoda fittings) at the ends, which can be quickly matched with the pantograph gas circuit interface. Connecting pipes 1 and 2 are used to connect to the interface to be tested in the pantograph gas circuit (such as the air inlet of the slide plate air chamber or the pneumatic valve connector). Single or double pipe connection can be flexibly selected according to the actual number of interfaces. Connecting pipe 3 13 is used to connect to the air outlet pipe 31 of the test end to form a closed detection circuit. Connecting pipe 2 12 is equipped with a manual control valve (the manual control valve is a ball valve, which can completely cut off the pipeline when closed to ensure the air circuit sealing). When the test end is connected to the pantograph gas circuit, if only one end is connected (that is, not connecting pipe 2 12 to the gas circuit), simply use the manual control valve to close connecting pipe 2 12 to avoid gas leakage in the test gas circuit, which helps to improve the overall practicality.

[0032] The lid 32 and the box body 30 are locked together by a locking assembly (the locking assembly can be a common lock, which will not be discussed in detail in this application), which prevents the lid 32 from opening suddenly when carrying the box body 30; U-shaped buckles 35 are fixedly connected to the outer walls on both sides of the lid 32, and a shoulder strap can be fastened through the U-shaped buckles 35 on both sides, making it convenient for staff to carry the box body 30.

[0033] A filter screen 37 is fixedly connected to the outer side of the box wall of the box body 30 that protrudes from the air inlet pipe 33, which can achieve a simple filtration effect.

[0034] A pressure relief valve 39 is installed on the top of the gas tank 37 to prevent the gas pressure inside the gas tank 37 from being too high and to ensure its safety during use; similarly, a vent is opened on the cover 32 to facilitate the gas in the gas tank 37 to be discharged outward. A filter screen is also installed at the location of the vent on the cover 32, and the filter screen is fixedly connected to the top outer wall of the cover 32.

[0035] The top of the gas storage tank 37 is also equipped with a vent end 38, which is equipped with a manual control valve (a manual ball valve can be used). After the gas circuit test is completed, the cover 32 is opened and the manual control valve of the vent end 38 is opened to discharge the gas in the gas circuit.

[0036] The top outer wall of the gas storage tank 37 is also equipped with a pressure gauge 310, which is used to display the pressure changes inside the gas storage tank 37.

[0037] The box 30 is pre-installed with battery block 2 (battery block 1 can be a 12V rechargeable lithium battery with a capacity of 4000mAh). Battery block 2 is connected to the micro air pump 36 via wires to provide power for the micro air pump 36. The outer wall of the box 30 is equipped with control switch 2, which is connected to battery block 2 and micro air pump 36 via wires. A USB charging switch is reserved on the wall of the box 30 for charging battery block 2 later.

[0038] In actual operation of the embodiments of this application,

[0039] Connect the detection end to the pantograph air circuit (the port of the detection end of the pantograph air circuit can be disassembled in advance). For example, the pantograph air circuit has two interfaces to be tested (interface A: the main air inlet of the slide plate air chamber, interface B: the joint where the air chamber connects to the pneumatic valve). Select the connection pipe 11 of the detection end to connect to interface A, and the connection pipe 2 12 to connect to interface B (to ensure that the connection between the connection pipe and the interface is sealed, a sealing joint or tape can be used for auxiliary sealing).

[0040] The air outlet pipe 31 at the test end is sealed and connected to the connecting pipe 313 at the detection end to form a closed air path of "test end → detection end → pantograph air path".

[0041] The micro air pump 36 is activated by control switch 2, drawing in air through the air inlet pipe 33 and compressing it into the air tank 37 (the pressure relief valve 39 automatically ensures the safety of the pressure inside the tank). The compressed air in the air tank 37 is stably output to the detection end through the regulating valve, inflating the pantograph air circuit until the pantograph air circuit pressure is balanced with the output pressure of the air tank 37 (by comparing the value on the pressure gauge 310 on the air tank 37 with the value on the display terminal 20). The micro air pump 36 is then turned off, at which point the air tank 37 stops supplying air, and the pantograph air circuit enters the pressure holding stage. The pressure sensor begins to detect pressure changes in real time and converts the pressure signal into an electrical signal, which is then transmitted to the controller. After processing, the controller displays the pressure value in real time on the display screen of the display terminal 20, allowing operators to visually observe the pressure changes.

[0042] If the pantograph's air circuit is well-sealed, the pressure value at display end 20 will remain stable (or fluctuate within the normal error range). If there is an air leak in the air circuit (such as cracks in the slide plate, loose connections, etc.), the pressure value will continue to drop. The faster the drop, the more serious the leak. Workers can judge the location and severity of the leak by the pressure change trend.

[0043] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. For those skilled in the art, various modifications and variations are possible with this utility model. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A pantograph gas circuit sealing test device, characterized in that: include, The detection end includes a housing, inside which is installed a detection probe. The detection probe has a hollow structure and a pressure sensor is embedded in its bottom. A display end is fixedly connected to the top of the detection probe. The display end is located on the outer side of the top of the housing. A control box is fixedly connected to the side of the display end without a display screen. The control box contains a controller, which is connected to the display end and the pressure sensor respectively through wires. The test end includes a box, inside which a gas tank is fixedly connected. The gas tank's inlet is connected to a miniature air pump via an air pipe. The side of the miniature air pump away from the gas tank is fixedly connected to the inner wall of the box. The inlet of the miniature air pump is fixedly connected to an inlet pipe, which passes through the box and communicates with the outside air. The gas tank's outlet is connected to an outlet pipe, which passes through the box and communicates with the test end.

2. The pantograph gas circuit sealing test device as described in claim 1, characterized in that: The control box contains a battery pack, which is connected to the controller via wires. A control switch is mounted on the outer wall of the control box, which is connected to the battery pack and the controller via wires. A USB charging switch is provided on the wall of the control box for charging the battery pack later.

3. The pantograph gas circuit sealing test device as described in claim 1, characterized in that: Connecting pipe one, connecting pipe two, and connecting pipe three are fixedly connected to the housing. Connecting pipe one and two are used to connect to the test interface of the pantograph air circuit, and connecting pipe three is used to connect to the air outlet pipe of the test end.

4. The pantograph gas circuit sealing test device as described in claim 3, characterized in that: The second connecting pipe is equipped with a manual control valve.

5. The pantograph gas circuit sealing test device as described in claim 1, characterized in that: The gas storage tank is equipped with a regulating valve at the outlet end, a pressure relief valve and a venting end at the top of the gas storage tank, a manual control valve at the venting end, and a pressure gauge at the outer wall of the top of the gas storage tank.

6. The pantograph gas circuit sealing test device as described in claim 1, characterized in that: The box body is equipped with a lid on top, which is connected to the box body by a hinge. The lid and the box body are locked together by a buckle. U-shaped buckles are fixedly connected to the outer walls on both sides of the lid, and the carrying strap can be fastened through the U-shaped buckles on both sides.

7. The pantograph gas circuit sealing test device as described in claim 6, characterized in that: A filter screen is fixedly connected to the outer side of the box wall on the side where the air inlet pipe passes through. A vent hole is opened on the box cover, and a filter screen is also installed at the position of the vent hole on the box cover. The filter screen is fixedly connected to the outer wall of the top of the box cover.

8. The pantograph gas circuit sealing test device as described in claim 7, characterized in that: The box contains a second battery pack, which is connected to a micro air pump via wires. The outer wall of the box is equipped with a second control switch, which is connected to the second battery pack and the micro air pump via wires. A USB charging switch is provided on the box wall for charging the second battery pack later.

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