Sand adding equipment for motor train unit

Abstract

The utility model discloses a motor train unit sand adding device which comprises a sand adding device and a fixing frame which are detachably connected to a moving frame, the sand adding device comprises a sand bin, and one end of the sand bin is connected with one end of a first fan assembly through a pipeline; the other end of the first fan assembly is connected with one end of the inverter; the other end of the inverter is connected with one end of the power supply; a controller is connected between the first fan assembly and the inverter; the other end of the power supply is connected with one end of the second fan assembly; the other end of the second fan assembly is respectively connected with the sand silo and the transmission pipe through a tee joint; the other end of the transmission pipe is connected with one end of the sand outlet; the other end of the sand outlet is matched with the sand adding opening to complete work; the fixing frame is of a rectangular structure, and a connecting piece is arranged on the contact face of the fixing frame and the sand silo and used for limiting the sand silo. And by using the moving frame and the fan assembly, only one operator can transport a large amount of quartz sand to carry out sand adding operation.

Description

Technical Field

[0001] This utility model relates to the field of rail transit equipment technology, specifically to a sand-adding device for high-speed trains, which is mainly applicable to the sand-adding device for the operation and maintenance of the braking system of high-speed trains. Background Technology

[0002] Generally speaking, the braking system of a high-speed train is the most crucial component among the nine key technologies of a high-speed train, directly affecting its safe operation, especially its ability to stop safely and smoothly at speeds exceeding 300 km / h. The braking system incorporates a sand-spraying device to increase the adhesion coefficient between the wheels and rails, aiding in better braking performance. Particularly during rainy and winter operations, water accumulation and icing on the rails can cause wheel slippage or spinning, affecting braking distance and seriously threatening passenger safety and property. Therefore, to ensure safety, the Brake Control Unit (BCU) controls the sand-spraying device to spray quartz sand onto the rails when wheel spinning or slipping occurs, thereby increasing the wheel-rail adhesion coefficient. However, with the use of quartz sand, high-speed train mechanics have added the maintenance task of adding quartz sand. This work is not only labor-intensive but also dirty, tiring, and time-consuming. Faced with the dual pressures of high workload for employees, especially during the Spring Festival travel rush and staff shortages, the development of a sand-spraying device for high-speed trains is urgently needed.

[0003] Regularly adding quartz sand to high-speed trains is one of the important tasks in train operation and maintenance, especially during the rainy and winter seasons. Therefore, the on-site team must prepare sufficient manpower and resources to ensure the completion of this task during each maintenance. However, because the sand box of the sand spreading device is located in the middle of the end wall of the bogie under the train, the sand adding work is extremely complicated and requires two employees to work together. One employee wears protective clothing and crawls under the bogie of the train to the sand box, while the other employee is responsible for assisting in transferring the quartz sand from the outside of the bogie. However, there is no special container for transporting quartz sand, so only discarded mineral water bottles can be used. Moreover, quartz sand is relatively heavy, so a special transfer vehicle is required. Therefore, one of the two employees adding sand must have a special vehicle driver's license.

[0004] Currently, on-site sand adding operations face numerous limitations, waste manpower and resources, and are inefficient and primitive, severely restricting overall production efficiency. Therefore, providing a sand adding device for high-speed trains has become a pressing technical challenge that needs to be addressed in this field. Summary of the Invention

[0005] In view of the many defects and shortcomings of the above-mentioned background technology, this utility model has made improvements and innovations, with the aim of providing a sand-adding device for EMU trains. One worker can independently complete the sand-adding operation, making the sand-adding process more time-saving and labor-saving. A large amount of quartz sand can be transported to a designated location at a time. The sand-adding process is made faster by setting up a fan assembly. The power supply provides the energy required for the operation of the fan assembly, which changes the original sand-adding operation method used before, reduces personnel costs, and improves maintenance efficiency.

[0006] The second objective of this invention is to make operation more flexible and adaptable to different sites by setting a remote-controlled Mecanum wheel chassis. Moreover, it can transport large amounts of quartz sand for sand addition operations with only one operator. The operation is simple, does not require a special vehicle driver's license, reduces the requirements for operators, and significantly improves both convenience and efficiency.

[0007] The third objective of this invention is to set up a first fan assembly and a second fan assembly. When the high-pressure fan in the second fan assembly blows the quartz sand, the brushless fan in the first fan assembly balances the air pressure in the sealed sand chamber, thereby ensuring rapid sand output while reducing the splashing of small quartz sand particles.

[0008] To solve the above problems and achieve the objectives of the invention, this utility model provides a sand-adding device for high-speed trains, which is implemented by adopting the following design mechanism and the following technical solution:

[0009] A sand-adding device for high-speed trains includes a sand-adding device (1) and a fixed frame (3) detachably connected to a movable frame (2). The sand-adding device (1) includes:

[0010] Sand bin (11), one end of sand bin (11) is connected to one end of the first fan assembly (12) through a pipe;

[0011] The first wind turbine assembly (12) is connected at one end to the inverter (13);

[0012] Inverter (13), the other end of inverter (13) is connected to one end of power supply (14);

[0013] A controller (18) is connected between the first wind turbine assembly (12) and the inverter (13).

[0014] The other end of the power supply (14) is connected to one end of the second fan assembly (15);

[0015] The second fan assembly (15) is connected at the other end to the sand bin (11) and the transmission pipe (16) respectively via a tee.

[0016] The other end of the transmission pipe (16) is connected to one end of the sand outlet (17);

[0017] The sand outlet (17) is connected to the sand filling port (4) at the other end to complete the work;

[0018] The fixing frame (3) has a rectangular structure. The fixing frame (3) is provided with a connector at the contact surface with the sand bin (11) to limit the position of the sand bin (11).

[0019] Preferably, the sand bin (11) includes a sand bin body and a sand bin cover. The sand bin body is connected to the second fan assembly (15) and the transmission pipe (16) through a three-way pipe. The sand bin cover is connected to the first fan assembly (12) through a pipe.

[0020] Both the sand silo cover and the sand silo body are designed to be sealed.

[0021] Preferably, the first fan assembly (12) includes a brushless fan (121) and a housing. The brushless fan (121) is fixed inside the housing. The first fan assembly (12) is connected to the sand chamber cover through a pipe. The housing of the first fan assembly (12) has ventilation holes.

[0022] Preferably, the second fan assembly (15) includes a high-pressure fan (151) and a housing. One end of the housing is connected to the sand chamber (11) and the transmission pipe (16) via a tee, and the other end of the housing is provided with a ventilation hole.

[0023] Preferably, the power supply (14) and the inverter (13) and controller (18) are used together to provide power to the first fan assembly (12), the second fan assembly (15) and the mobile frame (2).

[0024] Preferably, one end of the sand outlet (17) is provided with an "annular screen" structure to prevent quartz sand from splashing out of the sand box, and the other end of the sand outlet (17) is connected to the transmission pipe (16).

[0025] Preferably, the sand bin (11) has a funnel-shaped structure.

[0026] Preferably, the transmission tube (16) includes a straight tube and a bent tube for adjusting different positions and angles.

[0027] Preferably, the mobile frame (2) is a remote-controlled Mecanum wheel chassis, and shock absorbers (21) and turbine motors (22) are provided on the mobile frame (2).

[0028] Preferably, the movable frame (2) further includes:

[0029] The fence (23) is used to prevent the sand-adding device (1) and the fixed frame (3) on the mobile frame (2) from falling or colliding during movement.

[0030] The working principle is as follows: Before using the above-designed sand-adding equipment for EMUs, the first step is to assemble the sand-adding equipment for EMUs. During assembly, the first step is to install the fixed frame (3) on the mobile frame (2). The second fan assembly (15), power supply (14), inverter (13), controller (18) and the first fan assembly (12) are installed sequentially within the frame structure formed by the fixed frame (3). The second fan assembly (15), power supply (14), inverter (13), controller (18) and the first fan assembly (12) are interconnected.

[0031] Then, the sand bin (11) is installed in the preset position on the fixing frame (3). A connector is provided between the fixing frame (3) and the sand bin (11) to limit the position of the sand bin (11). Then, the top sand bin cover of the sand bin (11) is connected to the first fan assembly (12) through a pipe. At the bottom of the sand bin (11), it is connected to the second fan assembly (15) and one end of the transmission pipe (16) through a tee. The other end of the transmission pipe (16) is connected to the sand outlet (17). After the connection is completed, it can be used.

[0032] When using the equipment, the operator first fills the sand bin (11) of the equipment with quartz sand before starting the equipment.

[0033] During operation, railway maintenance personnel control the movement of the mobile frame (2) via remote control. When it moves to the designated position, the railway maintenance personnel open the sand filling port (4) cover of the EMU car bottom and insert the sand outlet (17) of the device into the sand filling port (4). The operation controller (18) controls the power supply to the first fan assembly (12) and the second fan assembly (15), so that the high-pressure fan (151) in the second fan assembly (15) blows air, blowing the quartz sand in the sand bin (11) through the transmission pipe (16) and the sand outlet (17) into the sand filling port (4) of the EMU car bottom. When the high-pressure fan (151) in the second fan assembly (15) starts to work, the brushless fan (121) in the first fan assembly (12) works at the same time to balance the air pressure in the sand bin (11), making the sand discharge smoother and preventing small particles of quartz sand from splashing. When the filling is about to be full, the operator operates the controller (18) to stop the first fan assembly (12) and the second fan assembly (15) from working, and the sand filling stops. The operator pulls the sand outlet (17) out from the sand filling port (4), closes the sand filling port (4) cover, puts the transmission pipe (16) on the mobile frame (2), uses the remote control to move the sand filling equipment of the EMU to the designated position, turns off the power (14), and finally, the operator cleans it up and waits for the next use.

[0034] During use, the power supply (14) provides power to the first fan assembly (12) and the mobile frame (2), and the power supply (14) and the inverter (13) are connected and cooperate to provide power to the second fan assembly (15).

[0035] In summary, the beneficial effects of this utility model compared with the prior art are as follows:

[0036] 1. The sand adding device allows the operator to complete the sand adding work by himself. The sand bin can store more quartz sand at one time. The second fan assembly improves work efficiency. The design of the transmission pipe can meet the sand adding port at different locations during the sand adding process.

[0037] 2. Due to the installation of a mobile frame, which is a remote-controlled Mecanum wheel chassis powered by electricity, the operator uses a remote control to control the movement of the mobile frame, making operation more convenient and requiring less skill from the operator. Moreover, by installing shock-absorbing components, this type of sand-addition equipment for high-speed trains will not be damaged when crossing complex roads.

[0038] 3. The present invention is equipped with a "ring-shaped screen" structure at the sand outlet to prevent quartz sand from splashing and to ensure the quality of the quartz sand added to the train set.

[0039] 4. This utility model is equipped with a first fan assembly, which works in conjunction with a sealed sand chamber. When the high-pressure fan in the second fan assembly is working, the brushless fan in the first fan assembly balances the pressure in the sand chamber, making the sand discharge smoother and reducing the splashing of small particles of quartz sand.

[0040] 5. This utility model solves all the above problems through its self-developed EMU sand-adding equipment. It not only enables one employee to complete the sand-adding work, but also utilizes a self-designed omnidirectional mobile trolley to transfer quartz sand and sand-adding equipment, making on-site operations more convenient and efficient. It also saves time and labor, while ensuring efficiency. The workload of employees is significantly reduced, and the working environment is significantly improved. It reduces personnel input under heavy workload conditions, thereby reducing personnel costs and improving maintenance efficiency. It is of great significance to the daily operation and maintenance of EMUs. Attached Figure Description

[0041] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein:

[0042] Figure 1 This is a schematic diagram of the usage state of this utility model;

[0043] Figure 2 This is one of the connection diagrams of this utility model;

[0044] Figure 3This is the second schematic diagram of the connection relationship of this utility model;

[0045] Figure 4 This is a partial structural perspective view of the present invention;

[0046] Figure 5 This is a schematic diagram of the sand outlet 17 structure of this utility model;

[0047] In the figure, the numbers are: 1—sand adding device, 11—sand bin, 12—first fan assembly, 13—inverter, 14—power supply, 15—second fan assembly, 16—transmission pipe, 17—sand outlet, 18—controller, 121—brushless fan, 151—high pressure fan.

[0048] 2—Mobile frame, 21—Shock absorber, 22—Turbine motor, 23—Fence;

[0049] 3—Fixed bracket;

[0050] 4—Sand filling port. Detailed Implementation

[0051] To make the technical means, inventive features, and achieved objectives and effects of this utility model readily understandable, the technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0052] Example 1

[0053] As per the instruction manual Figure 1 To the instruction manual Figure 5 The sand-adding equipment shown includes a sand-adding device 1 and a fixed frame 3 detachably connected to a movable frame 2. The sand-adding device 1 includes:

[0054] Sand bin 11, one end of which is connected to one end of the first fan assembly 12 via a pipe;

[0055] The first wind turbine assembly 12, the other end of which is connected to one end of the inverter 13;

[0056] Inverter 13, the other end of inverter 13 is connected to one end of power supply 14;

[0057] A controller 18 is connected between the first wind turbine assembly 12 and the inverter 13;

[0058] Power supply 14, the other end of which is connected to one end of the second fan assembly 15;

[0059] The second fan assembly 15, the other end of the second fan assembly 15 is connected to the sand bin 11 and the transmission pipe 16 respectively via a tee;

[0060] Transmission pipe 16, the other end of which is connected to one end of sand outlet 17;

[0061] Sand outlet 17, the other end of which is matched with sand inlet 4 to complete the work;

[0062] The fixing frame 3 has a rectangular structure, and a connector is provided at the contact surface between the fixing frame 3 and the sand hopper 11 to limit the position of the sand hopper 11.

[0063] Furthermore, the sand silo 11 includes a sand silo body and a sand silo cover. The sand silo body is connected to the second fan assembly 15 and the transmission pipe 16 through a three-way pipe, and the sand silo cover is connected to the first fan assembly 12 through a pipe.

[0064] Both the sand silo cover and the sand silo body are designed to be sealed.

[0065] In the above-described design of a sand-addition device for high-speed trains, before use, the fixed frame 3 is first fixed onto the movable frame 2. The second fan assembly 15, power supply 14, inverter 13, controller 18, and first fan assembly 12 are then connected. The sand bin 11 is then fixed at a preset position on the fixed frame 3 to limit its movement. The top sand bin cover of the sand bin 11 is connected to the first fan assembly 12 via a pipe. The bottom of the sand bin 11 is connected to the second fan assembly 15 and one end of the transmission pipe 16 via a tee. The other end of the transmission pipe 16 is connected to the sand outlet 17.

[0066] Example 2

[0067] Furthermore, such as Figure 3-4 As shown, the first fan assembly 12 includes a brushless fan 121 and a housing. The brushless fan 121 is fixed inside the housing. The first fan assembly 12 is connected to the sand chamber cover through a pipe. The housing of the first fan assembly 12 has ventilation holes.

[0068] Furthermore, the second fan assembly 15 includes a high-pressure fan 151 and a housing. One end of the housing is connected to the sand chamber 11 and the transmission pipe 16 via a tee, and the other end of the housing is provided with a vent.

[0069] Furthermore, the power supply 14 works in conjunction with the inverter 13 and the controller 18 to provide power to the first fan assembly 12, the second fan assembly 15, and the mobile frame 2.

[0070] In this invention, during operation, the power supply 14 and inverter 13 work together to provide power to the equipment, causing the high-pressure blower 151 inside the second blower assembly 15 to blow the quartz sand accumulated at the bottom of the sand bin 11 through the three-way pipe into the transmission pipe 16, and then transport it to the sand outlet 17 through the transmission pipe 16. The sand outlet 17 is connected to the sand filling port 4 to realize the sand filling operation. During the above process, the sand bin 11 is a sealed structure. When the second blower assembly 15 starts, the first blower assembly 12 connected to the top sand bin cover of the sand bin 11 starts simultaneously. The brushless fan 121 inside the first blower assembly 12 runs to balance the pressure inside the sand bin 11, making the sand discharge smoother and reducing the splashing of small quartz sand particles.

[0071] Example 3

[0072] This embodiment 3 is the same as embodiment 1 and embodiment 2, except that the mobile frame 2 is a transfer trolley with an open cargo compartment, in which the sand adding device 1 and the fixed frame 3 can be placed and transported by the transfer trolley.

[0073] Furthermore, such as Figure 5 As shown, one end of the sand outlet 17 is provided with an "annular screen" structure to prevent quartz sand from splashing out of the sand box, and the other end of the sand outlet 17 is connected to the transmission pipe 16.

[0074] Furthermore, the sand bin 11 has a funnel-shaped structure.

[0075] Furthermore, the transmission pipe 16 includes a straight pipe and a curved pipe for adjusting different positions and angles.

[0076] Furthermore, the mobile frame 2 is a remote-controlled Mecanum wheel chassis, and shock absorbers 21 and turbine motors 22 are installed on the mobile frame 2.

[0077] Furthermore, the movable frame 2 also includes:

[0078] The fence 23 is used to prevent the sand-adding device 1 and the fixed frame 3 on the mobile frame 2 from falling or colliding during movement.

[0079] When the above-mentioned sand-adding equipment for high-speed trains is in use, the 17 "ring-shaped screen" structures at the sand outlet can prevent quartz sand from splashing out of the sand box, allowing the quartz sand to be added into the sand box more effectively and ensuring the anti-slip requirement.

[0080] In this utility model, the design of the straight pipe and the curved pipe of the transmission pipe 16 enables this EMU sand adding equipment to meet the sand adding operation of the sand adding port 4 at different positions and angles.

[0081] Example 4

[0082] This embodiment 4 is the same as embodiments 1-3, except that a sand suction pipe is also connected to the vent of the first fan assembly 12. One end of the sand suction pipe is connected to the vent of the first fan assembly 12, and the other end of the sand suction pipe is a "funnel-shaped" suction head, which is connected to one end of the sand outlet 17 through a fixing bracket. The middle part of the sand suction pipe is connected to the transmission pipe 16 through a fixing component. During the sand adding process, when the first fan assembly 12 is working, the vent of the first fan assembly 12 draws air into the outer shell, so that the "funnel-shaped" suction head at one end of the sand outlet 17 sucks up the small particles of quartz sand that float and overflow from the sand adding port 4 during the sand adding process. The sucked small particles of quartz sand are transferred to the first fan assembly 12 through the sand suction pipe, and the small particles of quartz sand are blown into the sand chamber by the balancing effect of the first fan assembly 12 on the internal pressure of the sand chamber 11, reducing the risk of small particles of quartz sand splashing and being inhaled by the operator during the sand adding process.

[0083] In summary, a more specific embodiment of this utility model is as follows:

[0084] like Figure 1-2 As shown, a sand-adding device for high-speed trains includes a sand-adding device 1, a movable frame 2, and a fixed frame 3.

[0085] Before use, the sand-adding equipment for high-speed trains is first assembled. A fixed frame 3 is installed on the mobile frame 2. Within the frame structure formed by the fixed frame 3, the second fan assembly 15, power supply 14, inverter 13, controller 18, and first fan assembly 12 are sequentially installed. These components are interconnected and fixed to the fixed frame 3. Then, the sand bin 11 is installed at a predetermined position on the fixed frame 3. A connector is provided between the fixed frame 3 and the sand bin 11 to limit its movement. Next, a pipe connects the top of the sand bin 11 to the first fan assembly 12 via the sand bin cover. At the bottom of the sand bin 11, a T-junction connects the second fan assembly 15 and one end of the transmission pipe 16. The other end of the transmission pipe 16 is connected to the sand outlet 17.

[0086] During operation, power supply 14 provides power to the first fan assembly 12 and the mobile frame 2. Power supply 14 is connected to inverter 13, and power supply 14 and inverter 13 cooperate to provide power to the second fan assembly 15. The operator opens the sand hopper cover, fills the sand hopper 11 with quartz sand, closes the sand hopper cover to seal the sand hopper 11, and starts the equipment for operation. During operation, the mobile frame 2 is moved by remote control. The design of the shock absorber 21 and turbine motor 22 under the mobile frame 2 allows the mobile frame 2 to adapt to complex road environments and prevents damage to the sand filling device 1 on the mobile frame 2 due to road bumps. The design of the remote-controlled Mecanum wheel chassis makes the mobile frame 2 more flexible and can meet all-round movement requirements. Once moved to the designated position, the operator opens the cover of sand filling port 4, connects sand outlet 17 to sand filling port 4, and operates controller 18 to supply power to the first fan assembly 12 and the second fan assembly 15. This causes the high-pressure fan 151 in the second fan assembly 15 to operate, blowing air through the transmission pipe 16 and sand outlet 17 to the sand filling port 4 via the airflow from the tee connection below sand bin 11. While the high-pressure fan 151 in the second fan assembly 15 is operating, the brushless fan 121 in the first fan assembly 12 operates simultaneously to balance the air pressure within sand bin 11, ensuring smoother sand discharge and preventing small particles of quartz sand from splashing. The sand outlet is equipped with a ring-shaped screen structure to prevent quartz sand from splashing out of the sand box, allowing the quartz sand to be better added to the sand box under the train car, ensuring anti-slip requirements are met. When the tank is almost full, the operator operates the controller 18 to stop the first fan assembly 12 and the second fan assembly 15 from working, thus stopping the sand filling. The operator then pulls the sand outlet 17 out of the sand filling port 4, closes the sand filling port 4 cover, stores the transmission pipe 16 on the mobile frame 2, uses the remote control to move the sand filling equipment of this type of train set to the designated position, turns off the equipment switch, and finally cleans it up before waiting for the next use.

[0087] In this utility model, the connection is either a fixed connection or a detachable connection. The fixed connection is either a welded connection or a directly machined integral structure, while the detachable connection is either an internal or external threaded connection, a snap-fit ​​connection, or a plug-in structure connection.

[0088] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from its technical solution shall still fall within the protection scope of this utility model.

Claims

1. A sand-adding device for high-speed trains, comprising a sand-adding device (1) and a fixed frame (3) detachably connected to a movable frame (2), characterized in that: The sand adding device (1) includes: Sand bin (11), one end of which is connected to one end of the first fan assembly (12) via a pipe; The first wind turbine assembly (12) is connected at one end to the inverter (13); Inverter (13), the other end of inverter (13) is connected to one end of power supply (14); A controller (18) is connected between the first wind turbine assembly (12) and the inverter (13); Power supply (14), the other end of power supply (14) is connected to one end of the second fan assembly (15); The second fan assembly (15) is connected at the other end to the sand bin (11) and the transmission pipe (16) respectively via a tee. The other end of the transmission pipe (16) is connected to one end of the sand outlet (17); The sand outlet (17) is connected to the sand filling port (4) at the other end to complete the work; The fixing frame (3) has a rectangular structure. A connector is provided at the contact surface between the fixing frame (3) and the sand bin (11) to limit the position of the sand bin (11).

2. The sand-adding equipment for high-speed trains according to claim 1, characterized in that: The sand bin (11) includes a sand bin body and a sand bin cover. The sand bin body is connected to the second fan assembly (15) and the transmission pipe (16) through a three-way pipe. The sand bin cover is connected to the first fan assembly (12) through a pipe. Both the sand silo cover and the sand silo body are designed to be sealed.

3. The sand-adding equipment for high-speed trains according to claim 1, characterized in that: The first fan assembly (12) includes a brushless fan (121) and a housing. The brushless fan (121) is fixed inside the housing. The first fan assembly (12) is connected to the sand chamber cover through a pipe. The housing of the first fan assembly (12) has ventilation holes.

4. The sand-adding equipment for high-speed trains according to claim 1, characterized in that: The second fan assembly (15) includes a high-pressure fan (151) and a housing. One end of the housing is connected to the sand chamber (11) and the transmission pipe (16) via a tee, and the other end of the housing is provided with a vent.

5. A sand-adding device for high-speed trains according to claim 1, characterized in that: The power supply (14) works in conjunction with the inverter (13) and controller (18) to provide power to the first fan assembly (12), the second fan assembly (15), and the mobile frame (2).

6. The sand-adding equipment for high-speed trains according to claim 1, characterized in that: One end of the sand outlet (17) is provided with a "ring screen" structure to prevent quartz sand from splashing out of the sand box, and the other end of the sand outlet (17) is connected to the transmission pipe (16).

7. A sand-adding device for high-speed trains according to claim 2, characterized in that: The sand bin (11) has a funnel-shaped structure.

8. A sand-adding device for high-speed trains according to claim 1, characterized in that: The transmission tube (16) includes a straight tube and a bent tube, which are used to adjust different positions and angles.

9. A sand-adding device for high-speed trains according to claim 1, characterized in that: The mobile frame (2) is a remote-controlled Mecanum wheel chassis, and shock absorbers (21) and a turbine motor (22) are installed on the mobile frame (2).

10. A sand-adding device for high-speed trains according to claim 9, characterized in that: The mobile frame (2) also includes: The fence (23) is used to prevent the sand-adding device (1) and the fixed frame (3) on the mobile frame (2) from falling or colliding during movement.

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