Air tightness testing device for motor train unit compartment

Abstract

An air tightness testing device for a motor train unit carriage relates to the technical field of air tightness testing and comprises a support, a walking mechanism, a plugging mechanism and an electric cabinet. The front end of the support is used for arranging a blocking mechanism, the back end of the support is of a handrail step structure, and a walking mechanism and an electric cabinet are arranged at the bottom of the support. The blocking mechanism is used for blocking a vehicle door part of a compartment; the walking mechanism is used for driving the bracket to move; the electric control box is used for controlling the blocking mechanism and the walking mechanism to act; the workload of workers can be reduced, and the working efficiency of the testing device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of air tightness testing, and in particular to an air tightness testing device for an EMU carriage. Background Art

[0002] When the EMU is running at high speed, changes in the external environment (such as temperature, humidity, wind speed, etc.) will affect the internal environment of the car, and the pressure fluctuations outside the car will be transmitted into the car, causing air pressure fluctuations, thereby impacting the eardrums of the driver and passengers, causing symptoms such as tinnitus and ear pain, greatly affecting the driving comfort.

[0003] Good airtightness can reduce the impact of the external environment on the environment inside the car, keep the temperature and humidity inside the car relatively stable, and provide passengers with a comfortable riding environment. In order to ensure that the car has good airtightness, a single-car airtightness test is usually required. Single-car airtightness refers to after the train is installed, all openings that connect the train to the outside world (including openings through doors and air-conditioning equipment) are closed, and the change in the pressure inside the car relative to the pressure outside the car is detected to determine the sealing performance of the car body.

[0004] Chinese patent publication number CN217637866U discloses an EMU air tightness test device. A sliding frame on a fixture supports a blocking plate. Driven by a drive assembly, the blocking plate can be raised or lowered to a suitable position to block against the end wall, making it easy to adjust the height of the blocking plate. An air pump is connected to the interior of the carriage via an air pipe, supplying or extracting air to or from the interior of the carriage to maintain a preset positive or negative pressure inside the carriage. A locking assembly can reliably lock the blocking plate to the end wall, achieving an effective seal within the carriage, thereby determining whether the carriage's air tightness meets test requirements.

[0005] However, the device still uses a human-driven method to move the test device, which increases the workload of the operator and has low efficiency of human-driven movement, affecting the overall work efficiency of the air tightness test. Utility Model Content

[0006] The purpose of the utility model is to provide an air tightness testing device for a train compartment, which can reduce the workload of workers and improve the working efficiency of the testing device.

[0007] The utility model is achieved through the following technical solutions:

[0008] An air tightness test device for a train carriage comprises a bracket, a running mechanism, a blocking mechanism, and an electric control box; the front end of the bracket is used to set the blocking mechanism, the back end of the bracket is set as a handrail step structure, and the bottom of the bracket is provided with a running mechanism and an electric control box;

[0009] The blocking mechanism is used for blocking the door part of the carriage;

[0010] The walking mechanism is used for driving the bracket to move;

[0011] The electric control box is used for controlling the actions of the blocking mechanism and the walking mechanism.

[0012] Further, the blocking mechanism comprises a driving unit, a lifting rod, a blocking plate and clamps, wherein the driving unit is installed in the bracket, the lifting rod is slidingly installed at the front end of the bracket, and the lifting rod is drivingly connected with the driving unit;

[0013] The rod body of the lifting rod is fixedly provided with the blocking plate, the blocking plate is correspondingly matched with the door of the carriage, and the side edges of the blocking plate are uniformly provided with a plurality of clamps for tightly holding the door frame.

[0014] Further, the plate surface of the blocking plate is provided with an opening for being communicated with a suction pipe.

[0015] Further, the driving unit adopts a hand self-adapting micro hydraulic station and a hydraulic cylinder, wherein the hand self-adapting micro hydraulic station is installed at the bottom of the bracket and is used for providing power for the hydraulic cylinder, the hydraulic cylinder is located below the lifting rod, and the telescopic end of the hydraulic cylinder is fixedly connected with the lifting rod.

[0016] Further, the walking mechanism comprises walking wheels and a driving motor, wherein the walking wheels are respectively arranged at the front end and the back end of the bracket, and the driving motor is used for driving the walking wheel at the front end.

[0017] Further, the electric control box comprises a power supply, a voltage reduction module, a receiver, a signal conversion module, a blocking mechanism controller and a walking mechanism controller, wherein the power output end of the power supply is electrically connected with the voltage reduction module, the power output end of the voltage reduction module is respectively electrically connected with the receiver, the signal conversion module, the blocking mechanism controller and the walking mechanism controller;

[0018] The signal conversion module is used for receiving a remote control signal, the signal output end of the signal conversion module is electrically connected with the receiver, and the signal output end of the receiver is respectively electrically connected with the blocking mechanism controller and the walking mechanism controller.

[0019] The technical scheme of the utility model has at least the following advantages and beneficial effects:

[0020] The utility model discloses a kind of motor train unit carriage gas tightness testing device, by handrail step structure, worker can reach the top of bracket, to check the blocking condition between blocking mechanism and carriage door comprehensively;And electric control box can realize the automatic control of blocking mechanism and walking mechanism, to effectively reduce the labor amount of worker, improve the working efficiency of this testing device. DRAWINGS

[0021] Figure 1 A structural diagram of the utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the electric control box of the present utility model.

[0023] Figure numerals: 1. Bracket; 2. Traveling mechanism; 21. Traveling wheel; 22. Driving motor; 3. Sealing mechanism; 31. Driving unit; 311. Manual-automatic micro hydraulic station; 312. Hydraulic cylinder; 32. Lifting rod; 33. Sealing plate; 34. Clamp; 4. Electric control box; 41. Power supply; 42. Step-down module; 43. Receiver; 44. Signal conversion module; 45. Sealing mechanism controller; 46. Traveling mechanism controller; 5. Suction tube. DETAILED DESCRIPTION

[0024] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0026] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0027] In the description of the present invention, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the application is usually placed when in use. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0028] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0029] Example 1

[0030] As attached Figure 1 An air tightness testing device for an EMU carriage is shown, comprising a bracket 1, a running mechanism 2, a sealing mechanism 3 and an electric control box 4; the front end of the bracket 1 is used to set the sealing mechanism 3, the back end of the bracket 1 is set as a handrail step structure, and the bottom of the bracket 1 is provided with a running mechanism 2 and an electric control box 4; wherein the bracket 1 is a hollow frame composed of a plurality of steel pipes, and considering the gravity balance problem, the electric control cabinet will be set at a position close to the back end of the bracket 1. In addition, since the height of the EMU carriage is generally higher than the height of an adult during the air tightness test, the handrail step structure allows workers to reach the top of the bracket 1, so that they can fully check the sealing condition between the sealing mechanism 3 and the carriage door, and ensure that the subsequent air tightness test can be carried out smoothly.

[0031] The blocking mechanism 3 is used to block the door portion of the carriage, and after the blocking mechanism 3 blocks the door portion of the carriage, gas is introduced into the carriage or gas is extracted from the carriage to keep the carriage in a high pressure or negative pressure state, thereby testing the air tightness of the train carriage;

[0032] The walking mechanism 2 is used to drive the bracket 1 to move, thereby driving the blocking mechanism 3 to move;

[0033] The electric control box 4 is used to control the action of the blocking mechanism 3 and the traveling mechanism 2. Controlling the action of the traveling mechanism 2 can drive the bracket 1 and the blocking mechanism 3 to automatically move toward the door of the train carriage, and the blocking mechanism 3 can complete the blocking of the door after the action.

[0034] Example 2

[0035] The blocking mechanism 3 includes a driving unit 31, a lifting rod 32, a blocking plate 33 and a clamp 34, wherein the driving unit 31 is installed in the bracket 1, the lifting rod 32 is slidably installed on the front end of the bracket 1, and the lifting rod 32 is drivingly connected to the driving unit 31;

[0036] The rod body of the lifting rod 32 is fixed with a blocking plate 33, which corresponds to the door of the carriage. The side of the blocking plate 33 is evenly distributed with multiple clamps 34 for holding the door frame tightly.

[0037] Since the heights of carriages of different motor vehicles are different, the driving unit 31 drives the lifting rod 32 to move up and down, thereby driving the blocking plate 33 to move up and down, correspondingly adapting to doors of different heights;

[0038] In addition, when the blocking plate 33 is matched with the vehicle door, the driving unit 31 controls the movement of the clamp 34, thereby achieving a sealed blocking of the vehicle door, facilitating subsequent air tightness testing.

[0039] As needed, the surface of the sealing plate 33 is provided with an opening for communicating with the suction pipe 5. Compared with introducing gas into the car compartment or extracting gas from the car compartment from other places, the suction pipe 5 set on the surface of the sealing plate 33 allows the air pressure to be mostly concentrated on the sealing plate 33 during the air tightness test, and will not cause damage to the car compartment as a whole.

[0040] In addition, the driving unit 31 adopts a manual-automatic micro hydraulic station 311 and a hydraulic cylinder 312, wherein the manual-automatic micro hydraulic station 311 is installed at the bottom of the bracket 1 to provide power for the hydraulic cylinder 312. The hydraulic cylinder 312 is located below the lifting rod 32, and the telescopic end of the hydraulic cylinder 312 is fixedly connected to the lifting rod 32.

[0041] The lifting mechanism as a whole can be operated manually and controlled automatically, which improves the flexibility of implementation. In addition, the lifting stroke provided by the hydraulic cylinder 312 is relatively stable, which facilitates fine-tuning of the height of the blocking plate 33.

[0042] Example 3

[0043] The walking mechanism 2 includes walking wheels 21 and a drive motor 22, wherein the walking wheels 21 are respectively arranged at the bottom of the front end and the back end of the bracket 1, and the drive motor 22 is used to drive the walking wheels 21 at the bottom of the front end; since the front end of the bracket 1 where the blocking mechanism 3 is located is heavy, the front drive form is adopted to more easily drive the bracket 1 to move;

[0044] It should be noted that, in this embodiment, the running wheels 21 can only drive the bracket 1 to move in a straight line, so a worker is required to assist the bracket 1 in turning. The wheelbase of the running wheels 21 at the bottom of the back end of the bracket 1 is smaller than the wheelbase of the running wheels 21 at the bottom of the front end of the bracket 1. The running wheels 21 with a smaller wheelbase can facilitate subsequent workers to assist the bracket 1 in turning.

[0045] In addition, the use of a traveling wheel 21 with an enlarged wheel diameter and a widened wheel rim can effectively prevent the traveling wheel 21 from getting stuck in the sewage trough next to the track, ensuring that the device can cope with various complex road conditions.

[0046] Example 4

[0047] As attached Figure 2 As shown, the electric control box 4 includes a power supply 41, a voltage reduction module 42, a receiver 43, a signal conversion module 44, a blocking mechanism controller 45 and a walking mechanism controller 46, wherein the power output end of the power supply 41 is electrically connected to the voltage reduction module 42, and the power output end of the voltage reduction module 42 is electrically connected to the receiver 43, the signal conversion module 44, the blocking mechanism controller 45 and the walking mechanism controller 46 respectively;

[0048] The signal conversion module 44 is used to receive the remote control signal. The signal output end of the signal conversion module 44 is electrically connected to the receiver 43. The signal output end of the receiver is electrically connected to the blocking mechanism controller 45 and the walking mechanism controller 46 respectively.

[0049] The power supply 41 is a lithium battery pack with a charging function. After being started, the power supply 41 is used to supply power to the receiver 43, the signal conversion module 44, the blocking mechanism controller 45 and the walking mechanism controller 46;

[0050] The signal conversion module 44 is used to receive the remote control signal and convert the remote control signal into a voltage control signal for controlling the drive motor 22 and the manual-automatic micro hydraulic station 311;

[0051] The receiver 43 receives the voltage control signal, which controls the corresponding contactor to conduct and energize, so that the corresponding contact of the energized contactor actuates. The actuated contact energizes the corresponding pin of the blocking mechanism controller 45 or the traveling mechanism controller 46, and finally the blocking mechanism controller 45 or the traveling mechanism controller 46 controls the blocking mechanism 3 or the traveling mechanism 2 to perform the corresponding operation.

[0052] It should be noted that the electric control box 4 is installed at the bottom of the bracket 1. Since the large number of battery packs in the box provide secondary counterweight to the device, the center of gravity of the device is lowered, making it less likely to overturn when going over a slope or a bump.

[0053] According to the above embodiment, the specific control process when the device needs to move forward is given. That is, the worker presses the forward button of the remote control, the receiver 43 receives the forward signal, and then the coil of the KA2 contactor is energized, and the contact of the KA2 contactor at the walking mechanism controller 46 is closed, thereby controlling the motor in the walking mechanism 2 to rotate forward, that is, realizing the forward movement. The rest of the operations are similar.

[0054] It should be noted that when the driving unit 31 of the sealing mechanism 3 is in hydraulic drive form, the sealing mechanism controller 45 adopts an oil pump motor relay for controlling the operation of the oil pump motor of the manual-automatic micro hydraulic station 311 in the driving unit 31, and then realizes the lifting and lowering actions of the hydraulic rod.

[0055] And when the driving of the walking mechanism 2 is completed by the driving motor, the walking mechanism controller 46 adopts a motor controller for changing the forward and reverse rotation of the driving motor to realize the forward or backward movement of the walking mechanism 2.

[0056] The above is only the preferred embodiment of the present application, and is not used to limit the present application. For those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An airtightness test device for a train compartment, characterized by: It comprises a bracket (1), a walking mechanism (2), a blocking mechanism (3) and an electric control box (4); the front end of the bracket (1) is used to set the blocking mechanism (3), the back end of the bracket (1) is set as a handrail step structure, and the bottom of the bracket (1) is provided with the walking mechanism (2) and the electric control box (4); The blocking mechanism (3) is used to block the door portion of the carriage; The walking mechanism (2) is used to drive the bracket (1) to move; The electric control box (4) is used to control the actions of the blocking mechanism (3) and the traveling mechanism (2).

2. The air tightness testing device for a train compartment according to claim 1, characterized in that: The blocking mechanism (3) comprises a driving unit (31), a lifting rod (32), a blocking plate (33) and a clamp (34), wherein the driving unit (31) is installed in the bracket (1), the lifting rod (32) is slidably installed on the front end of the bracket (1), and the lifting rod (32) is drivingly connected to the driving unit (31); The rod body of the lifting rod (32) is fixedly provided with a blocking plate (33), which corresponds to the door of the carriage, and a plurality of clamps (34) for holding the door frame are evenly distributed on the side of the blocking plate (33).

3. The air tightness testing device for a train compartment according to claim 2, characterized in that: The plate surface of the blocking plate (33) is provided with an opening for communicating with the suction pipe (5).

4. The air tightness testing device for a train compartment according to claim 2, characterized in that: The driving unit (31) adopts a manual-automatic micro hydraulic station (311) and a hydraulic cylinder (312), wherein the manual-automatic micro hydraulic station (311) is installed at the bottom of the bracket (1) and is used to provide power for the hydraulic cylinder (312), the hydraulic cylinder (312) is located below the lifting rod (32), and the telescopic end of the hydraulic cylinder (312) is fixedly connected to the lifting rod (32).

5. The air tightness testing device for a train compartment according to claim 1, characterized in that: The walking mechanism (2) comprises walking wheels (21) and a driving motor (22), wherein the walking wheels (21) are respectively arranged at the bottom of the front end and the back end of the bracket (1), and the driving motor (22) is used to drive the walking wheels (21) located at the bottom of the front end.

6. The air tightness testing device for a train compartment according to claim 1, characterized in that: The electric control box (4) comprises a power supply (41), a voltage reduction module (42), a receiver (43), a signal conversion module (44), a blocking mechanism controller (45) and a walking mechanism controller (46), wherein the power output end of the power supply (41) is electrically connected to the voltage reduction module (42), and the power output end of the voltage reduction module (42) is electrically connected to the receiver (43), the signal conversion module (44), the blocking mechanism controller (45) and the walking mechanism controller (46) respectively; The signal conversion module (44) is used to receive remote control signals. The signal output end of the signal conversion module (44) is electrically connected to the receiver (43), and the signal output end of the receiver is electrically connected to the blocking mechanism controller (45) and the walking mechanism controller (46).

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