A double-jet sanding device for a high-speed train

Abstract

The utility model discloses a high -speed train group sanding device of double spray head to overcome the single function of existing sanding device, can only increase the insufficiency of unable to reduce the track surface friction coefficient. The device includes wire feeding mechanism and discharge mechanism. Wire feeding mechanism drives first, second wire feeding wheel through gear set, and discharge mechanism is equipped with independent first, second feeding pipeline, is equipped with discharge spray head and discharge port respectively. First pipeline conveys the friction reducing silk material of first wire feeding wheel push, and second pipeline conveys the friction increasing silk material of second wire feeding wheel push. Through this double -channel design, the increase, decrease function of train wheel rail friction is integrated, makes single device to be able to two -way regulation wheel rail friction coefficient according to the working condition needs, and has expanded the application range.

Description

Technical Field

[0001] This utility model relates to the field of wheel-rail friction control for high-speed trains, specifically to a sand-spreading device for high-speed trains with dual nozzles. Background Technology

[0002] Currently, my country's high-speed trains operate at high speeds, and track conditions are complex and variable. Especially during rain, snow, or emergency braking, the requirements for controlling wheel-rail adhesion are extremely stringent. The existing sand-spreading devices commonly used in high-speed trains have significant shortcomings: First, their mechanical structure is relatively complex, with some components exposed outside the rail skirts, making them susceptible to loosening or damage from airflow impacts and ballast collisions at high speeds, posing safety hazards. Second, their function is limited; they can only spray sand particles onto the rail surface to increase friction, failing to actively reduce friction when the wheel-rail friction coefficient is too high (such as when traversing small-radius curves), leading to increased wear and noise. They lack the ability to make bidirectional adjustments based on actual track conditions. This limitation restricts the optimization of train operating efficiency and the service life of the wheel-rail system. Therefore, there is an urgent need for a compact, well-protected sand-spreading device that can flexibly adjust the wheel-rail friction coefficient. Utility Model Content

[0003] The purpose of this utility model is to provide a dual-nozzle EMU sand spreading device to overcome the shortcomings of existing sand spreading devices that have a single function and can only increase but not reduce the friction coefficient of the rail surface.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A dual-nozzle sand-spreading device for high-speed trains, comprising: The wire feeding mechanism includes a wire feeding drive device, the output end of which is connected to a gear set, and the output end of the gear set is connected to a first wire feeding wheel and a second wire feeding wheel. When the first wire feeding wheel and the second wire feeding wheel are working, they contact the wire material and transmit power to the wire material. The discharge mechanism includes a first feeding pipe and a second feeding pipe, which are respectively located below the wire feeding mechanism. The first feeding pipe is provided with a first discharge nozzle and a first discharge port at the bottom of the first feeding pipe. The second feeding pipe is provided with a second discharge nozzle and a second discharge port at the bottom of the second feeding pipe. The first feeding pipe receives the first wire material pushed by the first wire feeding wheel to reduce the coefficient of friction between the wheel and the rail; the second feeding pipe receives the second wire material pushed by the second wire feeding wheel to increase the coefficient of friction between the wheel and the rail.

[0005] The first wire feeding wheel includes a first driven wheel and a one-way bearing arranged coaxially; the second wire feeding wheel includes a second driven wheel and a one-way bearing arranged coaxially; the first driven wheel and the second driven wheel respectively mesh with a gear set.

[0006] The side wall inside the wire feeding drive device is provided with a first pressing wheel and a second pressing wheel. The first pressing wheel cooperates with the first wire feeding wheel to clamp and push the first wire material, and the second pressing wheel cooperates with the second wire feeding wheel to clamp and push the second wire material.

[0007] A first spring is provided on the side of the first discharge nozzle near the first discharge port; a second spring is provided on the side of the second discharge nozzle near the second discharge port.

[0008] Both the first and second springs are pre-compressed.

[0009] Both the first and second discharge nozzles have a T-shaped cross-section and are equipped with through holes for the passage of filaments.

[0010] The wire feeding drive device generates power through a drive motor, and the drive motor transmits the power to the first wire feeding wheel and the second wire feeding wheel through a gear set.

[0011] The gear set can be a two-stage planetary gear set, a single-stage planetary gear set, or a spur gear set.

[0012] It also includes a support structure, installed on top of the wire feeding drive device, for the installation of the dual-nozzle train sand spreading device.

[0013] The end of the support structure furthest from the wire feeding drive device is also equipped with a structural mounting port for filling with wire.

[0014] Compared with the prior art, the present invention has the following beneficial technical effects: This invention provides a dual-nozzle sand-spreading device for high-speed trains, which fundamentally expands the device's functional range by integrating two independent and parallel wire feeding and discharge channels. Driven by a single drive source, the first and second wire feeding wheels in the wire feeding mechanism can respectively push two types of solid wires with different physical properties. These two types of wires are transported through their respective dedicated first and second feeding pipes, and finally act on the wheel-rail contact area through independent first and second discharge ports. Since the first feeding pipe is dedicated to transporting the first wire, which reduces the wheel-rail friction coefficient, while the second feeding pipe is dedicated to transporting the second wire, which increases the wheel-rail friction coefficient, the device can flexibly select and apply friction-increasing or friction-reducing materials according to the actual adhesion requirements of the track. This modular integration of friction-increasing and friction-reducing functions gives the single device the ability to actively adjust the wheel-rail friction coefficient in both directions, thus completely overcoming the technical limitations of traditional sand-spreading devices that can only increase friction in one direction and have a single function. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a dual-nozzle sand-spreading device for high-speed trains, as described in an embodiment of this utility model.

[0016] Figure 2 This is an exploded view of the gear assembly in an embodiment of this utility model.

[0017] Figure 3 This is a front view of the assembly of a dual-nozzle sand-spreading device for high-speed trains, as described in an embodiment of this utility model.

[0018] Figure 4 This is a top view of the assembly of a dual-nozzle sand-spreading device for a high-speed train, according to an embodiment of this utility model.

[0019] In the diagram, 1. Structural mounting port; 2. Support structure; 3. Second wire; 4. Second driven wheel; 5. Second clamping wheel; 6. First wire; 7. First driven wheel; 8. First clamping wheel; 9. Second wire feeding wheel; 10. First wire feeding wheel; 11. Gear set; 12. Wire feeding drive device; 13. First feeding pipe; 14. Second feeding pipe; 15. First discharge nozzle; 16. Second discharge nozzle; 17. First spring; 18. Second spring; 19. 20. First discharge port; 21. Second discharge port; 22. Planetary gear ring; 23. Second-stage sun gear; 24. Second-stage planetary gear; 25. Second-stage planetary carrier; 26. First-stage sun gear; 27. First-stage planetary gear; 28. First-stage planetary carrier; 29. ​​Gear motor connection port; 30. Input shaft; 31. Drive motor; 32. Train wheelset; 33. Dual-nozzle EMU sand spreading device; 34. Control system; 35. Lead wire; 36. Axle box; 37. Output wheel. Detailed Implementation

[0020] Currently, my country's high-speed trains operate at high speeds, and the track conditions are complex, placing stringent requirements on wheel-rail adhesion control. Existing sand-spreading devices have complex structures, with some components exposed outside the skirts, making them susceptible to damage from airflow impacts; their function is limited, only able to spray sand particles to increase friction, unable to reduce the friction coefficient when needed, and lacking bidirectional adjustment capabilities, thus restricting operating efficiency and the lifespan of the wheel-rail system.

[0021] Based on the above background, this utility model proposes a dual-nozzle sand-spreading device for high-speed trains. By setting up dual feed rollers for conveying friction-increasing and friction-reducing materials respectively, and independent feeding pipes, a complete bidirectional friction adjustment system is constructed. The first feeding pipe is dedicated to conveying materials that reduce the friction coefficient, while the second feeding pipe is dedicated to conveying materials that increase the friction coefficient. The two conveying systems operate independently and are integrated into the same device, realizing the ability to flexibly select between friction-increasing and friction-reducing functions according to line conditions, fundamentally solving the technical deficiency of traditional sand-spreading devices with only one function.

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0024] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "several" means two or more, unless otherwise explicitly specified.

[0026] Reference Figure 1 The image shows a specific embodiment of the dual-nozzle sand-spreading device for high-speed trains provided by this utility model, comprising: The wire feeding mechanism includes a wire feeding drive device 12. The output end of the wire feeding drive device 12 is connected to a gear set 11. The output end of the gear set 11 is connected to a first wire feeding wheel 10 and a second wire feeding wheel 9. When the first wire feeding wheel 10 and the second wire feeding wheel 9 are working, they contact the wire material and transmit power to the wire material. The discharge mechanism includes a first feeding pipe 13 and a second feeding pipe 14, which are respectively located below the wire feeding mechanism. The first feeding pipe 13 is provided with a first discharge nozzle 15 and a first discharge port 19 at the bottom of the first feeding pipe 13. The second feeding pipe 14 is provided with a second discharge nozzle 16 and a second discharge port 20 at the bottom of the second feeding pipe 14. The first feeding pipe 13 receives the first wire material 6 pushed by the first wire feeding wheel 10 to reduce the coefficient of friction between the wheel and the rail; the second feeding pipe 14 receives the second wire material 3 pushed by the second wire feeding wheel 9 to increase the coefficient of friction between the wheel and the rail.

[0027] In this specific embodiment, the wire feeding drive device 12 transmits power synchronously to the first wire feeding wheel 10 and the second wire feeding wheel 9 via the gear set 11, establishing a stable dual-channel power output foundation. The first wire feeding wheel 10 is dedicated to pushing the first wire material 6, which has a friction-reducing function, while the second wire feeding wheel 9 is dedicated to pushing the second wire material 3, which has a friction-increasing function, thus achieving independent supply and precise control of the two functional materials. In the discharge mechanism, the first feeding pipe 13 and the second feeding pipe 14 respectively receive materials from their corresponding wire feeding wheels, forming a non-interfering conveying path; the first discharge nozzle 15 and the second discharge nozzle 16, set inside the pipes, ensure that the material is directionally guided to the wheel-rail contact surface. This technical solution, through the coordinated cooperation of the wire feeding mechanism and the discharge mechanism, highly integrates the two functional modules of friction-increasing and friction-reducing into a single device, not only simplifying the structure but also achieving bidirectional active adjustment of the wheel-rail friction coefficient, thereby overcoming the inherent defect of the single function of traditional sand-spreading devices.

[0028] In another specific embodiment provided by this utility model, the first wire feeding wheel 10 includes a first driven wheel 7 and a one-way bearing arranged coaxially; and the second wire feeding wheel 9 includes a second driven wheel 4 and a one-way bearing arranged coaxially; the first driven wheel 7 and the second driven wheel 4 respectively mesh with the gear set 11.

[0029] The inner side wall of the wire feeding drive device 12 is provided with a first pressing wheel 8 and a second pressing wheel 5. The first pressing wheel 8 cooperates with the first wire feeding wheel 10 to clamp and push the first wire material 6, and the second pressing wheel 5 cooperates with the second wire feeding wheel 9 to clamp and push the second wire material 3.

[0030] A first spring 17 is provided on the side of the first discharge nozzle 15 near the first discharge port 19; a second spring 18 is provided on the side of the second discharge nozzle 16 near the second discharge port 20.

[0031] Both the first spring 17 and the second spring 18 are pre-compressed.

[0032] Both the first discharge nozzle 15 and the second discharge nozzle 16 have a T-shaped cross-section and are provided with through holes for the passage of filaments. The inner walls of the through holes of the first discharge nozzle 15 and the second discharge nozzle 16 can be coated with a particle-reinforced resin coating.

[0033] The configuration of gear set 11 can be changed depending on the situation; it can be a double-stage planetary gear set, a single-stage planetary gear set, or a spur gear set. When the required thrust of the wire is small, gear set 11 can also be replaced with a single-stage planetary gear set or a single spur gear that directly meshes with the left driven wheel 7 and the right driven wheel 4, thereby optimizing the wire feeding structure.

[0034] Specifically, the upper part of the wire feeding mechanism housing has two identical rectangular wire inlets, equidistant from a short axis of symmetry about the top surface of the housing, used to feed solid materials with altered friction coefficients. The thrust of the wire feeding is generated by a single drive motor 30 in the single wire feeding drive device 12, and the torque is amplified by a gear set 11. The gears ultimately output from the gear set 11 mesh with the first driven wheel 7 and the second driven wheel 4. The wire feeding wheel shaft adopts a one-way bearing principle, and the forward and reverse rotation of the drive motor 30 controls the wire feeding direction during operation. The discharge mechanism adopts a dual-nozzle self-retracting design, with a first spring 17 and a second spring 18 attached to the T-shaped discharge nozzles on both sides, respectively. During discharge, the friction between the wire and the through holes inside the discharge nozzles compresses the springs, causing the corresponding nozzles to extend and apply the wire onto the train wheels. After discharge, the pressure of the clamping wheel is released, the wire feeding thrust disappears, the springs return to their original length, and the nozzles retract to their initial positions.

[0035] The one-way bearing in the wire feeding mechanism is a special mechanism that allows only unidirectional relative rotation. In this specific embodiment, the second wire feeding wheel 9, which has a one-way bearing on one side, only allows counterclockwise relative movement, while the first wire feeding wheel 10, which has a one-way bearing on the other side, only allows clockwise relative movement. When the second driven wheel 4 rotates counterclockwise, the second wire feeding wheel 9 will not rotate. When the second driven wheel 4 rotates clockwise, due to the limiting effect of the one-way bearing, it acts as a force transmission shaft, driving the second wire feeding wheel 9 to rotate, and rotating together with the second pressing wheel 5, pushing the wire material downwards into the second discharge nozzle 16 for discharge. For the wire feeding mechanism on the other side, the one-way bearing only allows clockwise relative rotation. Therefore, when the first driven wheel 7 rotates counterclockwise, the wire material can be pushed downwards, and the first discharge nozzle 15 discharges the wire material; otherwise, no wire is fed. In this specific embodiment, since the gear set 11 and the left and right driven wheels are all in a first-order meshing relationship, the rotation directions of the two driven wheels must be the same. Therefore, when the drive motor 30 rotates clockwise, the two driven wheels rotate counterclockwise, and only the left wheel feeds wire; when the motor rotates counterclockwise, the two driven wheels rotate clockwise, and only the right wheel feeds wire.

[0036] The discharge mechanism adopts a spring self-extension and non-powered control principle, allowing control of the nozzle position without additional power. In one specific embodiment of this invention, the spring cavity is a hollow, closed cavity with an opening at the top facing the wire feeding path. The tops of the first discharge nozzle 15 and the second discharge nozzle 16 are the wire inlets. The upper end of the pre-compressed spring is connected to the top of the first discharge nozzle 15 and the second discharge nozzle 16, and the lower end is connected to the spring cavity. When the wire is pushed into the first discharge nozzle 15 and the second discharge nozzle 16 by the wire feeding mechanism, the friction between the wire and the inner wall of the through hole inside the discharge nozzle forces the spring to compress, causing the entire nozzle to extend and move downwards, allowing the wire to be delivered to the tread of the train wheel through the nozzle. After the wire feeding and discharge from one side of the pipe is completed, the pressure roller is released, the pressure on the pressure roller is released, the thrust of the wire feeding mechanism disappears, the spring releases its elastic potential energy and returns to its original length, and the nozzle retracts to the non-working state. This ensures that the nozzle extends for precise feeding during operation and retracts when not in operation.

[0037] In this specific embodiment, the gear set 11 is preferably a double-acting planetary gear set, the internal structure of which is as follows: Figure 2 As shown, the gear set 11 is internally divided into two-stage planetary systems. The first-stage planetary gear system consists of a first-stage sun gear 25, a first-stage planetary gear 26, and a first-stage planetary carrier 27. The second-stage planetary gear system consists of a second-stage sun gear 22, a second-stage planetary gear 23, and a second-stage planetary carrier 24. The first-stage sun gear is connected to the motor 30 via the motor input shaft 29. The first-stage and second-stage planetary gear systems are arranged in the planetary ring gear 21. When the drive motor 30 starts, its power is transmitted to the first-stage sun gear 25 via the motor output shaft 29 and the gear motor connection port 28.

[0038] First stage of transmission: The first stage sun gear 25 drives the first stage planetary gear 26 mounted on the first stage planetary carrier 27. Each first stage planetary gear 26 meshes and rolls within the fixed planetary ring gear 21, thereby driving the first stage planetary carrier 27 to rotate at a reduced speed.

[0039] Second-stage transmission: The first-stage planetary carrier 27 is rigidly connected coaxially to the second-stage sun gear 22, transmitting power to the second-stage sun gear 22. The second-stage sun gear 22 drives the second-stage planetary gears 23 mounted on the second-stage planetary carrier 24. Each second-stage planetary gear 23 meshes and rolls within a fixed planetary ring gear 21, thereby driving the second-stage planetary carrier 24 to rotate at a reduced speed.

[0040] The secondary planetary carrier 24 is rigidly connected to the output wheel 36 on the same axis. The output wheel 36 transmits the amplified torque to the first driven wheel 7 and the second driven wheel 4 meshing with it, thereby driving the wire feeding wheel to press and feed the wire.

[0041] The wire feeding drive device 12 generates power through the drive motor 30. In this specific embodiment, the drive motor 30 is selected as a DC motor. The drive motor 30 transmits power to the first wire feeding wheel 10 and the second wire feeding wheel 9 through the gear set 11. The drive motor 30 is connected to the input shaft 29 of the gear set 11. The end of the gear set 11 has a spur gear that meshes with the first driven wheel 7 and the second driven wheel 4 respectively. The first wire feeding wheel 10 and the second driven wheel 7 are coaxially connected through the first one-way bearing 10. The second wire feeding wheel 4 and the second driven wheel 5 are coaxially connected through the second one-way bearing 9. The first clamping wheel 8 cooperates with the first wire feeding wheel 10 to clamp the first wire material. The second clamping wheel 5 cooperates with the second wire feeding wheel 9 to clamp the second wire material. The discharge mechanism is symmetrically arranged along the central axis of the device. Each discharge mechanism includes a T-shaped discharge nozzle. Its top is connected to one end of a spring, and the other end of the spring is connected to the spring cavity, that is, the part below the T-shaped discharge nozzle in the feeding pipe. The T-shaped discharge nozzle can perform reciprocating piston movement in the spring cavity. In another specific embodiment of this utility model, the first spring 17 and the second spring 18 can also be arranged above the discharge nozzle in the feeding pipe, that is, the space of the feeding pipe above the discharge nozzle is used as the spring cavity.

[0042] The drive motor 30 can be installed inside the wire feeding drive device 12 or extended outside the device via the input shaft 29.

[0043] In another specific embodiment of this utility model, a support structure 2 is also included, which is installed on the top of the wire feeding drive device 12 and is used to fix the entire dual-nozzle train sand spreading device 32 at a designated position on the train. A structural mounting port 1 is provided at the end of the support structure 2 away from the wire feeding drive device 12. This structural mounting port 1 serves as a wire filling channel, allowing the wire to pass smoothly through the support structure 2 and accurately reach the wire feeding inlet located on the outer shell of the wire feeding drive device 12.

[0044] The dual-nozzle sand-spreading device 32 for high-speed trains provided by this utility model is installed in the running gear of the train during formal use, as detailed in the following reference. Figure 3 , Figure 4As shown, the control system 33 can also be connected via lead wire 34. It should be noted that the control system 33 mentioned in this specific embodiment is an existing braking control unit of the train or an independent programmable logic controller (PLC). Its hardware configuration, programming method, and communication interface with other train systems are all mature existing technologies in this field. The improvement of this utility model lies in the mechanical structure of the sand-spreading device body. The control system 33 is only used to receive train operating status signals and send start, stop, and steering commands to the drive motor 30; it does not involve any improvement to the computer program or control method. The control system 33 controls the amount of wire feed via lead wire 34. The dual-nozzle EMU sand-spreading device 32 sprays wire onto the train wheelset 31 to adjust the friction of specific road sections. Except for the nozzles, the dual-nozzle EMU sand-spreading device 32 is hidden inside the skirt. The nozzles of the dual-nozzle EMU sand-spreading device 32 are arranged on both sides of the train wheelset 31, as shown... Figure 4 As shown.

[0045] The dual-nozzle train sand-spreading device 32 provided in this specific embodiment is used to spray materials that increase and decrease the wheel-rail friction coefficient respectively. Therefore, the inner wall material of the internal through-hole and the spring stiffness coefficient of the discharge nozzles on different sides can be designed differently to meet the optimal thrust requirements. For example, graphite can be used as the material to reduce the friction coefficient, and semi-molten material can be used as the material to increase the friction coefficient. When the inner wall material and spring of the through-hole of the discharge nozzles on both sides are the same, graphite has less friction on the inner wall of the through-hole compared to semi-molten material, so the thrust required by the wire feeding mechanism is smaller. According to the self-extension design principle of the nozzle, the compression of the spring of the discharge nozzle on the graphite side is smaller at this time, and the nozzle is difficult to extend. In summary, the inner wall of the nozzle tube on the graphite side should use a material with a higher friction coefficient, and at the same time, a spring with a smaller stiffness coefficient should be used to ensure that the extension of the nozzles on both sides is sufficient and similar.

[0046] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A dual-nozzle sand-spreading device for high-speed trains, characterized in that, include: The wire feeding mechanism includes a wire feeding drive device (12), the output end of which is connected to a gear set (11), the output end of which is connected to a first wire feeding wheel (10) and a second wire feeding wheel (9). When the first wire feeding wheel (10) and the second wire feeding wheel (9) are working, they contact the wire material and transmit power to the wire material. The discharge mechanism includes a first feeding pipe (13) and a second feeding pipe (14), which are respectively located below the wire feeding mechanism. The first feeding pipe (13) is provided with a first discharge nozzle (15) and a first discharge port (19) is provided at the bottom of the first feeding pipe (13); the second feeding pipe (14) is provided with a second discharge nozzle (16) and a second discharge port (20) is provided at the bottom of the second feeding pipe (14). The first feeding pipe (13) receives the first wire material (6) pushed by the first wire feeding wheel (10) to reduce the coefficient of friction between the wheel and the rail; the second feeding pipe (14) receives the second wire material (3) pushed by the second wire feeding wheel (9) to increase the coefficient of friction between the wheel and the rail.

2. The dual-nozzle sand-spreading device for high-speed trains according to claim 1, characterized in that, The first wire feeding wheel (10) includes a first driven wheel (7) and a one-way bearing arranged coaxially; the second wire feeding wheel (9) includes a second driven wheel (4) and a one-way bearing arranged coaxially; the first driven wheel (7) and the second driven wheel (4) respectively mesh with the gear set (11).

3. The dual-nozzle sand-spreading device for high-speed trains according to claim 1, characterized in that, The inner side wall of the wire feeding drive device (12) is provided with a first pressing wheel (8) and a second pressing wheel (5). The first pressing wheel (8) cooperates with the first wire feeding wheel (10) to clamp and push the first wire material (6), and the second pressing wheel (5) cooperates with the second wire feeding wheel (9) to clamp and push the second wire material (3).

4. A dual-nozzle sand-spreading device for high-speed trains according to claim 1, characterized in that, The first discharge nozzle (15) is provided with a first spring (17) on the side near the first discharge port (19); the second discharge nozzle (16) is provided with a second spring (18) on the side near the second discharge port (20).

5. A dual-nozzle sand-spreading device for high-speed trains according to claim 4, characterized in that, Both the first spring (17) and the second spring (18) are pre-compressed.

6. A dual-nozzle sand-spreading device for high-speed trains according to claim 1, characterized in that, The first discharge nozzle (15) and the second discharge nozzle (16) both have a T-shaped cross-section and are provided with through holes for the passage of filaments.

7. A dual-nozzle sand-spreading device for high-speed trains according to claim 1, characterized in that, The wire feeding drive device (12) generates power through a drive motor (30), and the drive motor (30) transmits the power to the first wire feeding wheel (10) and the second wire feeding wheel (9) through a gear set (11).

8. A dual-nozzle sand-spreading device for high-speed trains according to claim 1, characterized in that, The gear set (11) is a two-stage planetary gear set, a single-stage planetary gear set, or a spur gear set.

9. A dual-nozzle sand-spreading device for high-speed trains according to claim 1, characterized in that, It also includes a support structure (2), which is installed on top of the wire feeding drive device (12) to realize the installation of the dual-nozzle train sand spreading device.

10. A dual-nozzle sand-spreading device for high-speed trains according to claim 9, characterized in that, The support structure (2) is also equipped with a structural mounting port (1) at the end away from the wire feeding drive device (12) for filling with wire.

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