Air charging device, application and air charging method

Abstract

The invention discloses an air charging device, application and an air charging method, solves the problem of low pressure maintaining test efficiency caused by complex structure and limitation of operation space at components such as a car coupler in the prior art, and greatly improves the working efficiency of air charging operations such as rescue, pressure maintaining and weighing, and the specific scheme is as follows: the air charging device comprises a base, the base is provided with a clamping part so that the base can be fixed to a coupler end plate through the clamping part, the base is further provided with a protruding part, the protruding part can move relative to the base and can be clamped into a coupler groove, a supporting piece is arranged on the base, the ventilation pipe penetrates through the supporting piece, the ventilation pipe can move relative to the supporting piece, the ventilation pipe is provided with a ventilation opening, and the ventilation pipe is communicated with the base. The supporting piece is connected with the pressing piece, one side of the pressing piece can make contact with the sealing end of the ventilation pipe, the pressing piece is operated to enable the ventilation pipe to move towards the coupler end plate relative to the supporting piece so that the base can be tightly attached to the coupler end plate, and then the ventilation pipe can be connected with the coupler air inlet pipeline in a sealed mode.

Description

Technical Field

[0001] This invention relates to the field of rail transportation, and in particular to an air-filling device, its application, and an air-filling method. Background Technology

[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.

[0003] EMU trains need to undergo pressure holding tests or BP (BCCP large channel air relay valve) rescue. BP rescue refers to transmitting air pressure to the train being rescued through the BP pipe, which is similar to the pressure holding test. Currently, the pressure holding test or rescue test involves assembling the BP rescue pipe at the upper part of the coupler of the lead car. However, there is no special tooling for the air inlet of the coupler air inlet pipe, making it difficult to conduct pressure holding tests or rescue tests from the coupler. The current solution is to disassemble the air inlet pipe of the rescue conversion device on the train and install a test quick connector in the onboard electrical distribution room or the front compartment of the driver's cab to conduct the pressure holding test or rescue test. However, this method has the following disadvantages: the operating space in the onboard electrical distribution room or the front compartment of the driver's cab is small, and the staff can only squat in the electrical distribution room or the front compartment of the driver's cab to install or disassemble the pipes, which makes the pipe disassembly difficult. After the test is completed, it is necessary to disassemble the pipes to restore them to their original state, which invisibly prolongs the operation time.

[0004] In addition, the coupler end plate is uneven and irregular in structure, making it impossible to install relevant test fixtures. Even if it is installed with difficulty, it cannot guarantee a tight fit with the ventilation pipe at the coupler, resulting in air leakage.

[0005] Moreover, the weighing of high-speed trains also requires air filling, which presents the same problems; other components that require air filling will also encounter the same problems. Summary of the Invention

[0006] To address the shortcomings of existing technologies, the primary objective of this invention is to provide an air-charging device that effectively secures the air-charging device using an irregular coupler end plate, ensuring the effective conduct of pressure holding tests or rescue tests.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0008] An air-charging device includes a base with a locking part for fixing the base to a component to be charged. The base also has a protrusion that is movable relative to the base and can engage with a groove in the component to be charged. A support member is provided at the base, and a ventilation pipe passes through the support member and is movable relative to the support member. The ventilation pipe has a ventilation opening and is connected to the base. The support member is connected to a clamping member, and one side of the clamping member can contact the sealing end of the ventilation pipe. Operating the clamping member causes the ventilation pipe to move relative to the support member toward the component to be charged, so that the base and the component to be charged fit tightly together, thereby sealing the connection between the ventilation pipe and the air inlet pipe of the component to be charged, so that air can be charged to the component through the ventilation pipe and the air inlet pipe of the component to be charged.

[0009] As described above, the base is provided with a locking part, which facilitates the connection of one side of the base to the air-filled component. The base is also provided with a protrusion, which is movable relative to the base. After the locking part of the base is connected to the air-filled component, the protrusion is moved so that it engages with the groove of the air-filled component, thus making the base and the air-filled component stably connected. The operating clamping member moves the ventilation pipe relative to the support member toward the air-filled component, so that the base and the air-filled component fit tightly together, thereby making the ventilation pipe and the air inlet pipe of the air-filled component sealed and connected so that air can be supplied to the air-filled component through the ventilation pipe and the air inlet pipe of the air-filled component.

[0010] As described above, in an air-filling device, after the clamping member clamps the ventilation pipe and the component to be filled with air, the clamping member can maintain the clamping force on the ventilation pipe. Thus, during the pressure-holding test, after the clamping member is operated, the operator does not need to continue to operate the clamping member by hand, which effectively reduces the labor intensity of the operator.

[0011] As described above, in the air-charging device, considering the structural arrangement of the component to be charged, the groove of the component to be charged is located inside the component to be charged, the engaging part is a slot, and the protrusion extends beyond the slot at the position of the base.

[0012] As described above, the air-charging device includes a base plate with a bent portion on one side to form a locking part. The locking part engages with the upper edge of the component to be charged. The base plate intersects with the support member. The base plate has an opening communicating with a ventilation pipe, and one end of the ventilation pipe can pass through the opening. The protrusion is spaced apart from the support member. The support member not only facilitates the installation of the clamping member but also ensures the movement of the ventilation pipe relative to the support member.

[0013] As described above, the air-charging device further includes a second base plate connected to the first base plate. The second base plate is offset from the first base plate and has the aforementioned protrusion. When the base is fixed to the air-charging component, the distance between the second base plate and the air-charging component is less than the distance between the first base plate and the air-charging component. At this time, the first base plate and the air-charging component can fit together fully, and the second base plate can enter the circular hole of the air-charging component, which facilitates the protrusion to be engaged in the groove of the air-charging component.

[0014] As described above, in an air-charging device, the base is provided with a bracket, which supports an adjusting component. The adjusting component is located on the side of the base away from the component to be charged, so as to facilitate the operation of the adjusting component by the operator. The adjusting component is connected to the protrusion, which is located on the side of the base facing the component to be charged. The adjusting component drives the protrusion to move relative to the base.

[0015] In the air-filling device described above, the protrusion is a rack, which is movably connected to the bracket. The adjusting component includes a gear that meshes with the rack and is connected to an operating lever. The straight line of the rack is parallel to the upper edge of the component to be filled.

[0016] As described above, in an air-charging device, the support member includes a support plate connected to the clamping member. A sleeve is provided on one side of the support plate, and the ventilation pipe passes through the sleeve. The distance between the ventilation pipe and one end of the base is greater than the distance between the air inlet pipe of the component to be charged and the component to be charged. The ventilation pipe is movable relative to the sleeve. A first limiting end is provided at one end of the ventilation pipe passing through the sleeve. The width or diameter of the first limiting end is greater than the inner diameter of the ventilation pipe, and the first limiting end can contact the base.

[0017] In the air-filling device described above, a second limiting end is provided at the end of the ventilation pipe away from the first limiting end, and a distance is provided between the second limiting end and the sealing end of the ventilation pipe. An elastic element is provided between the second limiting end and the sleeve.

[0018] As described above, in an air-filling device, a ball bearing is movably disposed at the sealing end of the ventilation pipe, one side of the clamping member contacts the ball bearing, and the ventilation opening is disposed between the sealing end of the ventilation pipe and the second limiting end.

[0019] In the air-filling device described above, the clamping member is a pair of bolt clamps. One side of the opening of the bolt clamps contacts the sealing end of the ventilation pipe, the other side of the opening of the bolt clamps is removed, and one side of the hinge of the bolt clamps is fixed to the support member.

[0020] Secondly, the present invention also discloses the application of an air-charging device, which is used to charge air at the coupler of a high-speed train for pressure holding tests, rescue tests, or weighing at the coupler.

[0021] Thirdly, the present invention also provides a method for charging air at a component to be charged, using the aforementioned air charging device, comprising the following:

[0022] The operator holds the clamping part to fix the base to the air-filled component through the locking part, and moves the protrusion so that the protrusion is locked into the groove of the air-filled component, thus fixing the air-filling device to the air-filled component.

[0023] The operator uses the clamping device to press the ventilation pipe, causing the ventilation pipe to move relative to the support device toward the component to be filled with air so that the base fits tightly with the component to be filled with air.

[0024] Air is supplied to the ventilation opening, and the ventilation duct is connected to the air inlet duct of the component to be charged so that air can be supplied to the component to be charged through the ventilation duct and the air inlet duct of the component to be charged, thereby conducting pressure holding tests, rescue tests or weighing.

[0025] The beneficial effects of the present invention are as follows:

[0026] 1) The device provided by the present invention has a base with a locking part, which facilitates the connection of one side of the base to the air-filled component. The base also has a protrusion that is movable relative to the base. After the locking part of the base is connected to the air-filled component, the protrusion is moved so that it engages with the groove of the air-filled component, thus making the base and the air-filled component stably connected. The operating clamping member moves the ventilation pipe relative to the support member toward the air-filled component, so that the base and the air-filled component fit tightly together, thereby making the ventilation pipe and the air inlet pipe of the air-filled component sealed and connected so that air can be supplied to the air-filled component through the ventilation pipe and the air inlet pipe of the air-filled component. The whole device utilizes an irregular air-filled component, but can ensure that the device is fixed to the air-filled component, effectively improving the quality of operation and ensuring work efficiency.

[0027] 2) In this invention, a locking part is provided on one side of the base, and a protrusion is also provided on the base. The protrusion and the locking part are spaced apart. The edge of the top side of the air-filled component and the groove structure in the middle are cleverly utilized to ensure a stable connection between the entire device and the air-filled component. The base is provided with a first bottom plate and a second bottom plate. The second bottom plate is connected to the protrusion. The first bottom plate and the second bottom plate are staggered to ensure that the first bottom plate can effectively fit with part of the plane of the air-filled component, while the second bottom plate can enter the circular hole of the air-filled component, which is conducive to the protrusion being locked into the groove of the air-filled component.

[0028] 3) In this invention, the base is provided with a bracket, which supports an adjustment component. The adjustment component includes a gear. The gear is located on the side of the base away from the component to be filled with air. The gear engages with the protrusion, i.e., the rack. The gear rotates to drive the rack to move relative to the base, thereby allowing the protrusion to be inserted into the groove of the component to be filled with air. The structure is simple and reasonable.

[0029] 4) The support structure in this invention is reasonably designed. The support includes a support plate, which is intersected with the base. The support plate supports the sleeve. The ventilation pipe passes through the sleeve. The distance between the ventilation pipe and one end of the base is greater than the distance between the air inlet pipe of the air-to-be-charged component and the air-to-be-charged component. The clamping component is connected to the support. The movable end of the clamping component contacts the sealing end of the ventilation pipe. In this way, when the movable end of the clamping component pushes the support to move relative to the sleeve, the sealed connection between the ventilation pipe and the air inlet pipe of the air-to-be-charged component can be guaranteed.

[0030] 5) In this invention, the clamping component is a bolt clamp. After the bolt clamp clamps the ventilation pipe, the operator does not need to continue operating it. The clamping force on the ventilation pipe can be maintained. One side of the opening of the bolt clamp is removed, and the support component is equivalent to the other side of the opening. By operating the operating handle of the bolt clamp, the side that contacts the sealing end of the ventilation pipe can be pressed to make the ventilation pipe move relative to the support component.

[0031] 6) The pressure holding test method in this invention can utilize the complex structure of the component to be filled with air to ensure a stable connection between the test device and the component to be filled with air. Then, through the operation of the clamping component, the ventilation pipe can be made to move linearly relative to the support component, thereby making the base fit tightly with the component to be filled with air, and making the ventilation pipe connected to the air inlet pipe of the component to be filled with air to ensure the smooth progress of air filling projects such as pressure holding test, rescue test or weighing. Attached Figure Description

[0032] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0033] Figure 1 This is a schematic diagram of an air-charging device according to one or more embodiments of the present invention.

[0034] Figure 2 This is an enlarged schematic diagram of a portion of the structure of an air-filling device according to one or more embodiments of the present invention.

[0035] Figure 3 This is a schematic diagram of the coupler end face.

[0036] Figure 4 This is a schematic diagram of the air-charging device in use according to one or more embodiments of the present invention.

[0037] The diagram exaggerates the spacing or dimensions between parts to show their positions; the diagram is for illustrative purposes only.

[0038] Among them: 1. Clamping part, 2. Ball bearing, 3. Ventilation pipe, 3-1. Ventilation port, 3-2. First limiting end, 3-3. Second limiting end, 4. Spring, 5. Sleeve, 6. Coupler end plate, 6-1. Coupler groove, 6-2. Coupler air inlet pipe, 6-3. Circular hole, 7. Base, 7-1. First base plate, 7-2. Second base plate, 7-3. Slot, 8. Protrusion, 8-1. Operating handle, 8-2. Bracket, 8-3. Rack, 8-4. Gear, 8-5. Limiting seat, 9. Supporting part, 9-1. Support plate. Detailed Implementation

[0039] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0040] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, unless otherwise expressly indicated by the invention, the singular form is also intended to include the plural form. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0041] As described in the background section, some existing technologies suffer from low efficiency in pressure holding tests of components to be inflated. To address these technical problems, this invention proposes an air-inflating device.

[0042] Example 1

[0043] In a typical embodiment of the present invention, reference is made to Figure 1 As shown, an air-charging device, taking the coupler end plate as an example, includes a base 7. The base 7 has a locking part, which is a slot 7-3, and is fixed to the coupler end plate 9 through the slot 7-3. The base 7 also has a protrusion 8, which is movable relative to the base 7 and can be engaged into the coupler groove 6-1. A support member 9 is provided at the base 7, and a ventilation pipe 3 passes through the support member 9 and is movable relative to the support member 9. A ventilation port 3-1 is provided on the side of the ventilation pipe 3. The ventilation port can be an existing quick connector. The opening 3-1 is used to connect with the ventilation duct. The ventilation duct 3 is connected to the base 7. The support 9 is connected to the clamping member 1. One side of the clamping member 1 can contact the sealing end of the ventilation duct 3. By operating the clamping member 1, the ventilation duct 3 moves relative to the support member toward the coupler end plate 6 so that the base 7 and the coupler end plate 6 fit tightly together. Because a sealing ring is set at the coupler air inlet duct 6-2, the ventilation duct 3 and the coupler air inlet duct 6-2 are sealed together so that pressure holding tests or rescue tests can be carried out through the ventilation duct 3 and the coupler air inlet duct 6-2.

[0044] It should be noted that after the clamping component 1 clamps the ventilation pipe 3 to the coupler end plate 6, the clamping component 1 can maintain the clamping force on the ventilation pipe 3. Thus, during the pressure holding test, after the operation of the clamping component 1 is completed, the operator does not need to continue to operate the clamping component 1 by hand, which effectively reduces the labor intensity of the operator.

[0045] Specifically, the clamping component 1 is a bolt cutter from the prior art. The bolt cutter has an operating handle, and the two sides of the bolt cutter are hinged together. One side of the bolt cutter opening (on the same side as the bolt cutter operating handle) contacts the sealing end of the ventilation pipe 3. The other side of the bolt cutter opening is removed. One side of the bolt cutter hinge is fixed to the support component 9. Thus, after the base is connected to the coupler end plate 6, operating the bolt cutter operating handle will cause one side of the bolt cutter opening to press the ventilation pipe 3, causing the ventilation pipe 3 to move toward the coupler end plate.

[0046] In this embodiment, the base 7 includes a first base plate 7-1. One side of the first base plate 7-1 is bent to form a slot 7-3. The slot is a U-shaped groove. The slot of the base can be fixed to the coupler end plate 6 from the side. The width of the U-shaped groove is adapted to the thickness of the upper edge of the coupler end plate 6. The slot 7-3 is engaged with the upper side of the coupler end plate 6. The first base plate 7-1 is intersected with the support member 9. The protrusion 8 is spaced apart from the support member 9. The support member 9 not only facilitates the setting of the clamping member, but also ensures the movement of the ventilation pipe 3 relative to the support member 9.

[0047] In addition, the base 7 also includes a second base plate 7-2, which is connected to the first base plate 7-1. The second base plate 7-2 and the first base plate 7-1 are arranged parallel to each other. The first base plate can be a flat plate. The width of the second base plate is smaller than the width of the first base plate 7-1. The second base plate 7-2 and the first base plate 7-1 are offset, so that the second base plate extends beyond the first base plate. The second base plate 7-2 is provided with a protrusion 8. When the base 7 is fixed to the coupler end plate 6, the distance between the second base plate 7-2 and the coupler end plate 6 is smaller than the distance between the first base plate 7-1 and the coupler end plate 6. At this time, the first base plate 7-1 and the coupler end plate 6 can fit together fully, and the second base plate can enter the circular hole of the coupler, which facilitates the protrusion 8 to be inserted into the coupler groove.

[0048] Considering the structural design of the coupler end plate 6, refer to Figure 3 As shown, the coupler groove 6-1 is located inside the coupler end plate 6 and is located on one side of the circular hole 6-3. Therefore, the protrusion 8 and the slot 7-2 are spaced apart, and the position of the protrusion 8 on the base extends beyond the position of the slot 7-3 so that the protrusion can penetrate into the circular hole 6-3 at the coupler end plate.

[0049] It should be noted that a bracket 8-2 is provided at the second base plate of the base 7. The bracket 8-2 supports the adjusting component. The adjusting component is located on the side of the base 7 away from the coupler end plate 6 to facilitate the operation of the adjusting component by the operator. The adjusting component is connected to the protrusion 8, which is located on the side of the base 7 facing the coupler end plate 6. The adjusting component drives the protrusion 8 to move relative to the base 7.

[0050] In this embodiment, the bracket 8-2 is frame-shaped to support the adjusting component, and the protrusion 8 is a rack 8-3, which is movably connected to the bracket 8-2. (See reference) Figure 2 As shown, the adjusting component includes a gear 8-4, which is supported by a bracket 8-2. The gear 8-4 meshes with a rack 8-3. The straight line of the rack 8-3 is parallel to the upper edge of the coupler end plate 6. A limiting seat 8-5 is provided on the side of the second base plate facing the coupler end plate 6. The limiting seat 8-5 has an opening through which the rack 8-3 passes. The center hole of the gear 8-4 is connected to the operating rod 8-1. Rotating the operating rod 8-1 will drive the gear 8-4 to rotate, thereby pushing the rack 8-3 to move along the second base plate.

[0051] refer to Figure 1 As shown, the support member 9 includes a support plate 9-1, which is fixed to the first base plate 7-1. The support plate and the first base plate 7-1 are perpendicularly connected. The support plate 9-1 is spaced apart from the end of the first base plate away from the protrusion 8. The distance between the support plate 9-1 and the end of the first base plate away from the protrusion 8 is greater than the distance between the coupler air inlet pipe and the upper edge of the coupler end plate. The distance between the coupler air inlet pipe and the upper edge of the coupler end plate plus the thickness of the first base plate is the distance between the support plate 9-1 and the end of the first base plate away from the protrusion 8. In this way, when the slot 7-2 is connected to the base, the ventilation pipe and the coupler air inlet pipe can be aligned without adjustment.

[0052] It is easy to understand that the support plate 9-1 is connected to the clamping member 1. A sleeve 5 is provided on one side of the support plate 9-1, and the sleeve 5 is spaced apart from the first base plate 7-1. The support plate 9-1 extends beyond one end of the sleeve 5. The ventilation pipe 3 passes through the sleeve 5. Under the action of the clamping member 1, the ventilation pipe 3 is movable relative to the sleeve 5. A first limiting end 3-2 is provided at the end of the ventilation pipe 3 that passes through the sleeve 5. The first limiting end 3-2 can be a limiting plate with a set thickness. The limiting plate can be a circular plate or a rectangular plate. The width or diameter of the first limiting end 3-2 is greater than... The inner diameter of the ventilation pipe 3 is such that the limiting plate extends beyond the sleeve 5 under normal conditions, preventing the ventilation pipe from detaching from the sleeve 5. The first limiting end 3-2 can contact the base. An opening is provided at the first base plate 7-1 of the base. The first limiting end 3-2 is hollow. The width or diameter of the first limiting end 3-2 is smaller than the inner diameter of the opening. The width or diameter of the first limiting end 3-2 is greater than or equal to the outer diameter of the coupler air inlet pipe 6-2. After the first limiting end passes through the opening, it can communicate with the coupler air inlet pipe. The opening and the ventilation pipe 3 can be aligned with the coupler air inlet pipe 6-2.

[0053] In addition, a second limiting end 3-3 is provided at the end of the ventilation pipe 3 away from the first limiting end 3-2. The diameter of the second limiting end 3-3 is larger than the diameter of the ventilation pipe 3. The second limiting end 3-3 is spaced apart from the sealing end of the ventilation pipe 3. An elastic element, which is a spring 4, is provided between the second limiting end 3-3 and the sleeve 5. The spring 4 is sleeved around the sleeve 5 in the circumferential direction. The second limiting end limits the elastic element. The second limiting end 3-3 is spaced apart from the sealing end of the ventilation pipe.

[0054] In some examples, a recess is provided at the sealing end of the ventilation pipe 3, and a ball bearing 2 is movably disposed in the recess. The ball bearing 2 is disposed so that the clamping member and the ball bearing 2 are in point contact, which is conducive to the transmission of force. The ball bearing 2 can rotate relative to the sealing end of the ventilation pipe 3. When the ball bearing 2 is pressed on one side of the clamping member, the force can be transmitted to the ventilation pipe 3. One side of the clamping member is in contact with the ball bearing 2. The ventilation opening 3-1 is disposed between the sealing end of the ventilation pipe and the second limiting end.

[0055] The device provided in this embodiment has a base 7 with a slot 7-3, which facilitates the connection of one side of the base 7 to the coupler end plate 6. The base 7 also has a protrusion 8, which is movable relative to the base 7. After the base slot 7-3 is connected to the coupler end plate 6, the protrusion 8 is moved so that it engages with the coupler groove 6-1. The protrusion 8 is a rack 8-3. By cleverly utilizing the top edge of the coupler and the structure of the coupler groove, the base 7 of the rescue test device is effectively fixed by combining the slot 7-3 with the gear 8-4 and the rack 8-3. The operating clamping member moves the ventilation pipe 3 relative to the support member toward the coupler end plate, so that the base 7 and the coupler end plate 6 are tightly fitted. This allows the ventilation pipe 3 to be sealed and connected to the coupler air inlet pipe 6-2 for pressure holding tests or rescue tests. The whole device can ensure that it is fixed to the coupler end plate 6, effectively improving the quality of operation and ensuring work efficiency.

[0056] Example 2

[0057] This embodiment provides a method for charging air into a component to be charged. Taking a train coupler as an example, it employs a charging device described in Embodiment 1, with reference to... Figure 4 As shown, it includes the following:

[0058] The operator holds the clamping part 1, i.e., the pliers, and fixes the base 7 to the coupler end plate 6 through the slot 7. The operator rotates the operating lever, and the rack rotates and moves the rack 8-3 to the coupler groove 6-1. The air charging device is fixed to the coupler end plate 6 through the slot and the protrusion 8-3.

[0059] The operator uses a pair of pliers to transmit force through the ball bearing 2 and the ventilation pipe 3, causing the ventilation pipe 3 to move relative to the sleeve 5 toward the coupler end plate 6, so that the first limiting end presses against the base 7, and the base 7 is tightly fitted with the coupler end plate 6.

[0060] Air is supplied to the ventilation opening 3-1, and the ventilation pipe 3 is connected to the air inlet pipe 6-2 of the coupler for air-filling projects such as pressure holding test, rescue test or weighing.

[0061] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An air filling device, characterized in that: The invention comprises a base, wherein a clamping part is provided on the base so that the base is fixed to the component to be filled with air through the clamping part, and a convex part is also provided on the base, which is movable relative to the base and can be inserted into the groove of the component to be filled with air. A support is provided on the base, and a ventilation pipe passes through the support and is movable relative to the support. A vent is provided on the ventilation pipe, and the ventilation pipe is connected with the base, and the support is connected with a clamping part, and one side of the clamping part can contact with the sealing end of the ventilation pipe. The clamping part is operated to move the ventilation pipe relative to the support toward the component to be filled with air so that the base and the component to be filled with air are closely fitted, thereby making the ventilation pipe and the air inlet pipeline of the component to be filled with air in a sealed connection so as to fill the component to be filled with air through the ventilation pipe and the air inlet pipeline of the component to be filled with air.

2. The air-filling device according to claim 1, characterized in that: After the compression piece has compressed the ventilation pipe and the component to be filled with air, the compression piece can maintain the compression force on the ventilation pipe.

3. The air-filling device according to claim 1, characterized in that: The engaging portion is a slot, and the position of the protrusion on the base exceeds the position of the slot.

4. The air-filling device according to claim 1, characterized in that: The base includes a first bottom plate, one side of which is bent to form the clamping portion, the clamping portion is clamped and connected with the upper edge of the component to be filled with air, the first bottom plate is intersected with the support member, the first bottom plate is provided with an opening connected to the ventilation pipe, one end of the ventilation pipe can pass through the opening, and the protrusion is set at a distance from the support member.

5. The air-filling device according to claim 4, characterized in that: The base also includes a second bottom plate, which is connected to the first bottom plate, and the second bottom plate is staggered with the first bottom plate. The second bottom plate is provided with the protrusion. When the base is fixed to the component to be filled with air, the distance between the second bottom plate and the component to be filled with air is smaller than the distance between the first bottom plate and the component to be filled with air.

6. The air-filling device according to claim 1, characterized in that: The base is provided with a bracket, the bracket supports the adjusting member, the adjusting member is located on the side of the base away from the component to be filled with air, the adjusting member is connected to the convex portion, the convex portion is located on the side of the base facing the component to be filled with air, and the convex portion is driven to move relative to the base by the adjusting member.

7. The air-filling device according to claim 6, characterized in that: The protrusion is a rack, the rack is movably connected to the bracket, the adjustment member includes a gear, the gear is meshed with the rack, and the gear is connected to the operating rod.

8. The air-filling device according to claim 1, characterized in that: The support member includes a support plate, which is connected to the clamping member. A sleeve is arranged on one side of the support plate. The ventilation pipe is arranged through the sleeve. The distance between the ventilation pipe and one end of the base is greater than the distance between the air inlet pipeline of the component to be filled with air and the component to be filled with air. The ventilation pipe is movable relative to the sleeve. A first limit end is arranged at one end of the ventilation pipe passing through the sleeve. The width or diameter of the first limit end is greater than the inner diameter of the ventilation pipe.

9. The air-filling device according to claim 8, characterized in that: A second limiting end is arranged at one end of the ventilation pipe away from the first limiting end, the second limiting end is arranged at a distance from the sealing end of the ventilation pipe, and an elastic member is arranged between the second limiting end and the sleeve.

10. The air-filling device according to claim 9, characterized in that: A ball is movably arranged at the sealing end of the ventilation pipe, one side of the pressing member is in contact with the ball, and the ventilation opening is arranged between the sealing end and the second limiting end of the ventilation pipe.

11. The air-filling device according to claim 1, characterized in that: The clamping member is a locking pliers, one side of the opening of the locking pliers contacts the sealing end of the ventilation pipe, the other side of the opening of the locking pliers is removed, and one side of the hinge of the locking pliers is fixed to the supporting member.

12. Use of an air-filling device according to any one of claims 1 to 11, characterized in that: It is used to fill air at the coupler of EMU to carry out pressure test, rescue test or weighing at the coupler.

13. A method for filling a component to be filled with air, characterized in that: An air-filling device according to any one of claims 1 to 11, comprising the following contents: The operator holds the pressing piece and fixes the base to the component to be filled with air through the clamping part, and moves the convex part so that the convex part is clamped into the groove of the component to be filled with air, so that the air charging device is fixed to the component to be filled with air; The operator operates the pressing member to press the ventilation pipe, so that the ventilation pipe moves relative to the support member toward the component to be filled with air, so that the base is closely fitted with the component to be filled with air; Air is supplied to the ventilation port, and the ventilation pipe is connected to the air inlet pipeline of the component to be filled with air so as to fill the component to be filled with air through the ventilation pipe and the air inlet pipeline of the component to be filled with air, thereby performing a pressure holding test, a rescue test or a weighing test.

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