Iron powder magnetic collecting device for railway ballast bed

Abstract

The invention relates to an iron powder magnetic force collecting device for a railway ballast bed. The iron powder magnetic force collecting device comprises a vehicle body, a conveying belt system, a magnetic force generating unit, a magnetic force control unit and a collecting system. The vehicle body is used for bearing the conveying belt system, the magnetic force generating unit, the magnetic force control unit and the collecting system. The conveying belt system comprises a conveying belt capable of circularly rotating; the magnetic force generating unit is arranged in the magnetic force layer of the conveying belt and used for generating magnetic attraction force so as to attract the iron powder in the attraction area; and the magnetic force control unit is configured to enable the magnetic force of the magnetic force generation unit to lose efficacy in the collection area, so that the adsorbed iron powder is separated and falls into the collection system. According to the iron powder magnetic force collecting device, through circulating rotation of the conveying belt and precise control over the magnetic force generating unit by the magnetic force control unit, the iron powder magnetic force collecting device can continuously adsorb iron powder in the adsorption area and automatically release the iron powder in the collecting area, manual intervention is not needed, continuous and automatic collection of the iron powder is achieved, and the production efficiency is improved. And the operation efficiency of cleaning the iron powder of the railway ballast bed is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of railway ballast maintenance equipment, and particularly to a magnetic iron powder collecting device for railway ballast. Background Art

[0002] After a railway line is put into operation, as trains keep passing, diseases will gradually occur to the rails. In order to maintain the state of the rails, a grinding vehicle is usually used to perform grinding operations on the rails to remove diseases and restore the rails to the best profile. During the rail grinding process, a powder collecting device is generally configured to collect the iron powder generated by grinding. However, due to the limitations of the space of the grinding vehicle and the on-site line conditions, the powder collecting device often cannot completely collect all the iron powder, and some iron powder will fall onto the tracks and ballast.

[0003] These residual iron powders have an adverse impact on the operation of the line. At present, for the iron powder that has fallen onto the ballast, the main cleaning methods are flushing or manual cleaning. However, both of these methods have obvious defects. The flushing method is not only inefficient, but also easily causes corrosion of the rails, and at the same time, a caking phenomenon of iron powder may occur on the ballast. Manual cleaning greatly increases the workload of maintenance personnel and requires occupying the skylight time, affecting the normal operation of the line. Most of the existing railway ballast iron powder cleaning devices adopt a fixed magnetic adsorption structure, and due to the accumulation of iron powder during continuous operation, the magnetic force decays, and it is necessary to frequently stop the machine for cleaning, resulting in low efficiency. Therefore, how to provide an efficient ballast iron powder collecting device to improve the cleaning efficiency of the ballast has become an urgent problem to be solved. Summary of the Invention

[0004] The object of the present invention is to provide a magnetic iron powder collecting device for railway ballast, which realizes continuous and automatic collection of iron powder and improves the operation efficiency of cleaning iron powder on railway ballast.

[0005] In order to achieve the above object, the technical solution proposed by the present invention is as follows:

[0006] A magnetic iron powder collecting device for railway ballast includes: a vehicle body, a conveyor belt system, a magnetic force generating unit, a magnetic force control unit, and a collecting system;

[0007] The vehicle body is used to carry the conveyor belt system, the magnetic force generating unit, the magnetic force control unit, and the collecting system;

[0008] The conveyor belt system includes a conveyor belt that can rotate in a cycle. The conveyor belt at least includes a magnetic layer. The conveyor belt system is provided with an adsorption area and a collecting area, and the adsorption area is located at one end of the conveyor belt close to the ballast;

[0009] The magnetic force generating unit is disposed in the magnetic layer of the conveyor belt and is configured to generate a magnetic suction force to adsorb iron powder in the adsorption area.

[0010] The magnetic force control unit is configured to deactivate the magnetic force of the magnetic force generating unit in the collection area, so that the adsorbed iron powder detaches and falls into the collection system.

[0011] In one embodiment, the conveyor belt system further includes a driving mechanism for driving the conveyor belt to rotate in a cycle.

[0012] In one embodiment, a magnetic force strengthening unit is further provided at the adsorption area, and the magnetic force strengthening unit is located inside the conveyor belt near one end close to the roadbed.

[0013] In one embodiment, the magnetic force generating unit is a permanent magnet, and the magnetic force control unit is a demagnetizing device. The demagnetizing device is disposed inside the conveyor belt at the collection area, and the demagnetizing device generates a magnetic field opposite to the magnetic field of the permanent magnet.

[0014] In one embodiment, the magnetic force generating unit is an electromagnet, and the magnetic force control unit is disposed at the adsorption area and extends to the outer edge of the collection area. The magnetic force control unit supplies power to the electromagnet.

[0015] In one embodiment, the way the magnetic force control unit supplies power to the electromagnet is contact power supply. The magnetic force control unit includes a power supply slide rail disposed on the side of the conveyor belt, and a power connection contact is provided on the side of the electromagnet to cooperate with the power supply slide rail. When the power connection contact touches the power supply slide rail, the electromagnet is energized to generate a magnetic field.

[0016] In one embodiment, the magnetic force generating unit is an electromagnet, and the electromagnet is connected with a capacitor energy storage module. The magnetic force control unit is disposed at the collection area and extends along the transmission direction of the conveyor belt to before the adsorption area. The magnetic force control unit is configured to charge the capacitor energy storage module. The electromagnet generates a magnetic force through the discharge of the capacitor energy storage module in the adsorption area, and the magnetic force fails due to the depletion of the electric energy stored in the capacitor energy storage module in the collection area.

[0017] In one embodiment, the way the magnetic force control unit charges the capacitor energy storage module is contact charging. The magnetic force control unit includes a charging slide rail disposed on the side of the conveyor belt, and a power connection contact is provided on the side of the electromagnet to cooperate with the charging slide rail.

[0018] In one embodiment, a groove for cooperating with the top of the rail is provided on the outer surface of the conveyor belt along its length direction, and the magnetic layer is arranged conformally.

[0019] In one embodiment, the collection system includes a dust collection box, a negative pressure conveying system, and a storage box. The dust collection box is located below the collection area, and the negative pressure conveying system is connected to the dust collection box and the storage box through a pipeline.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] The iron powder magnetic collection device for railway ballast provided by the present invention enables the iron powder magnetic collection device to continuously adsorb iron powder in the adsorption area and automatically release iron powder in the collection area through the cyclic rotation of the conveyor belt and the precise control of the magnetic force control unit over the magnetic force generation unit, without manual intervention, realizing the continuous and automatic collection of iron powder and improving the operation efficiency of cleaning iron powder on railway ballast. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Hereinafter, the present invention will be described in more detail based on embodiments and with reference to the drawings.

[0023] Figure 1 is a schematic structural diagram of the iron powder magnetic collection device for railway ballast provided by an embodiment of the present invention;

[0024] Figure 2 is a schematic installation structure diagram of the magnetic force strengthening unit;

[0025] Figure 3 is a schematic connection structure diagram of the power supply slide rail and the power connection contact;

[0026] Figure 4 is a schematic structural diagram of the iron powder magnetic collection device with a charging slide rail;

[0027] Figure 5 is a schematic connection structure diagram of the charging slide rail and the power connection contact;

[0028] Figure 6 is a schematic structural diagram of the conveyor belt with grooves;

[0029] Figure 7 is a schematic structural diagram of the conveyor belt with grooves and the driven roller with an intermediate support wheel;

[0030] Reference Signs:

[0031] 1, conveyor belt; 1-1, outer layer of the conveyor belt; 1-1-1, groove; 1-2, magnetic layer; 1-3, inner layer of the conveyor belt;

[0032] 2, driving roller;

[0033] 3, driven roller; 3-1, support wheel;

[0034] 4, driving reduction motor;

[0035] 5. Lifting cylinder;

[0036] 6. Sleeper;

[0037] 7. Ballast bed;

[0038] 8. Rail;

[0039] 9. Electrical control box;

[0040] 10. Storage box;

[0041] 11. Vacuum amplifier;

[0042] 12. Pipeline;

[0043] 13. Dust collection box bell mouth;

[0044] 14. Scraping blade;

[0045] 15. Dust collection box;

[0046] 16. Degaussing device;

[0047] 17. Power supply slide rail;

[0048] 18. Electromagnet; 18-1. Power connection contact; 18-2. Elastic member;

[0049] 19. Charging slide rail;

[0050] 20. Magnetic force strengthening unit. Detailed implementation manners

[0051] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0052] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0053] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it 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, and it can also be the communication inside two components. It can be a wireless connection or a wired connection. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0055] As Figures 1 to 6 shown, this embodiment provides an iron powder magnetic collection device for railway ballast, which realizes the continuous and automatic collection of iron powder and improves the operation efficiency of cleaning the iron powder on the railway ballast.

[0056] An iron powder magnetic collection device for railway ballast includes: a vehicle body, a conveyor belt system, a magnetic force generation unit, a magnetic force control unit, and a collection system. In order to more clearly show the main innovative structure of the present invention, Figure 1 the part of the vehicle body is omitted. The vehicle body structure is a prior art, mostly a frame vehicle body structure with four wheels. The four wheels enable the iron powder magnetic collection device to move along the rail 8 on the ballast 7. There are sleepers 6 on the ballast 7, and the rail 8 is on the sleepers.

[0057] The vehicle body is used to carry the conveyor belt system, the magnetic force generation unit, the magnetic force control unit, and the collection system.

[0058] A conveyor belt system is provided on the vehicle body, which includes a conveyor belt 1 that can rotate in a cycle. The conveyor belt 1 at least includes a magnetic layer 1-2. In this embodiment, the magnetic layer 1-2 and the outer conveyor belt layer 1-1 of the conveyor belt 1 are arranged in an inner and outer layer. The magnetic layer 1-2 is located inside the outer conveyor belt layer 1-1. By setting the conveyor belt 1 with a multi-layer structure containing the magnetic layer 1-2, during the cyclic rotation of the conveyor belt 1, the outer conveyor belt layer 1-1 contacts the rail 8, while adsorbing the iron powder at the ballast 7 and the rail 8, avoiding the wear of the magnetic layer 1-2 and improving the overall service life of the conveyor belt 1. In order to reduce the wear inside the conveyor belt 1, a conveyor belt inner layer 1-3 is also provided at the innermost layer of the conveyor belt 1 in this embodiment.

[0059] The conveyor belt system is provided with an adsorption area and a collection area. As Figure 1 shown, the conveyor belt 1 is inclined. The adsorption area is located at one end of the conveyor belt 1 close to the ballast 7. The conveyor belt 1 at the adsorption area contacts the rail 8. The collection area is located below the other end of the conveyor belt 1. A collection system is provided in the collection area;Figure 1 The conveyor belt 1 rotates in a clockwise direction. In the adsorption area, the magnetic force of the magnetic layer 1-2 of the conveyor belt 1 adsorbs the iron powder, and the iron powder is transported to the collection area with the conveyor belt 1. In the collection area, a structure is required to be designed to make the iron powder separate from the conveyor belt 1 and fall into the collection system. In the prior art, in order to separate the material adsorbed on the conveyor belt 1, a mechanical scraper is usually provided, for example, Figure 1 As shown, a scraper 14 can be provided at the end of the collection area of ​​the present embodiment, so that the iron powder adsorbed on the conveyor belt 1 can be separated from the conveyor belt 1 by the action of the scraper 14. However, if the iron powder is removed only by means of a mechanical scraper, in order to ensure that the scraping is clean, it is necessary to maintain a large contact pressure between the scraper 14 and the conveyor belt 1, which will increase the wear of both and reduce the service life. Therefore, the present invention proposes a new structural design idea, that is, by providing a magnetic force generating unit and a magnetic force control unit, the magnetic layer 1-2 of the conveyor belt 1 is demagnetized when it rotates to the collection area to achieve automatic separation of the iron powder under the action of its own weight. At the same time, in order to clean up a small amount of iron powder that may be stuck to the conveyor belt 1 because the iron powder is damp or has a spike shape, the present example also retains the structure of providing the scraper 14 at the end of the collection area, but the contact pressure between it and the conveyor belt 1 can be relatively set to be smaller, thereby extending the service life of the conveyor belt 1 and the scraper 14.

[0060] The magnetic force generating unit is arranged in the magnetic layer 1-2 of the conveyor belt 1, and is used to generate magnetic attraction to adsorb iron powder in the adsorption area; in this embodiment, Figure 1 As shown, the magnetic force generating unit is composed of a plurality of magnetic bodies with a transverse length arranged along the length direction of the conveyor belt 1. By such an arrangement, the flexibility of the magnetic layer 1-2 can be achieved while ensuring sufficient magnetic force is provided.

[0061] The magnetic force control unit is configured to disable the magnetic force of the magnetic force generating unit in the collection area, so that the adsorbed iron powder is separated and falls into the collection system.

[0062] like Figure 1As shown, the conveyor belt system further includes a driving mechanism for driving the conveyor belt 1 to rotate in a cycle. If the driving mechanism is not provided, a pushing handle can also be provided on the vehicle body, and the device can be set to be manually pushed, and the friction force between the conveyor belt 1 and the rail 8 is used to drive the conveyor belt 1 to rotate, which can be used in field operation scenarios where it is inconvenient to connect to electricity, but the operation efficiency is relatively low. In this embodiment, the driving mechanism is a driving reduction motor 4 connected to the driving roller 2. The driving reduction motor 4 is fixed on the vehicle body. The driving roller 2 is arranged at one end of the conveyor belt 1 to drive the conveyor belt 1 to rotate in a cycle, and a driven roller 3 is arranged at the other end of the conveyor belt 1. In this embodiment, a lifting cylinder 5 is also arranged at the driven roller 3. The lifting cylinder 5 is connected to the driven roller 3. By controlling the action of the lifting cylinder 5, the lifting and lowering of the driven end of the conveyor belt 1 can be controlled. When adsorption operation is required, the driven roller 3 is lowered, and after the operation is completed, the driven roller 3 is raised to facilitate the overall movement of the device.

[0063] As Figure 2 shown, a magnetic force strengthening unit 20 is also provided at the adsorption area. The magnetic force strengthening unit 20 is located inside the conveyor belt 1 near one end of the roadbed 7. Specifically, in this embodiment, the magnetic force strengthening unit 20 is a permanent magnet arranged on the rotating shaft of the driven roller 3. By providing the magnetic force strengthening unit 20 at the adsorption area, the device has double magnetism of the magnetic force strengthening unit 20 and the magnetic layer 1-2 of the conveyor belt 1 when in the adsorption area, increasing the magnetic suction force for separating the iron powder from the roadbed 7 and the rail 8 and enhancing the effect of adsorbing the iron powder.

[0064] In one embodiment, the magnetic force generating unit is a permanent magnet. As Figure 1 shown, the magnetic force control unit is a demagnetizing device 16. The demagnetizing device 16 is arranged inside the conveyor belt 1 at the collection area. The demagnetizing device 16 generates a magnetic field opposite to the magnetic field of the permanent magnet, and the magnetic field of the permanent magnet is reduced by setting the demagnetizing device 16, so that the magnetic suction force received by the iron powder is reduced or even disappears to achieve the automatic separation of the iron powder.

[0065] In another embodiment, the magnetic force generating unit is an electromagnet 18. The magnetic force control unit is designed to make the magnetic force generating unit energized at the adsorption area and extending to the outer edge of the collection area. As Figure 1 and Figure 3As shown, the magnetic force control unit is arranged in the adsorption area and extends to the outer edge of the collection area. The magnetic force control unit supplies power to the electromagnet 18. Specifically, the way the magnetic force control unit supplies power to the electromagnet 18 is contact power supply. The magnetic force control unit includes a power supply slide rail 17 arranged on the side of the conveyor belt 1. A power connection contact 18-1 is provided on the side of the electromagnet 18 to cooperate with the power supply slide rail 17. When the power connection contact 18-1 contacts the power supply slide rail 17, the electromagnet 18 is energized to generate a magnetic field. The power supply slide rail 17 is arranged in the adsorption area on the side of the conveyor belt 1 and extends to the outer edge of the collection area. The power supply slide rail 17 is fixed to the support frame of the conveyor belt 1. When the conveyor belt 1 rotates in the area of the power supply slide rail 17, the power connection contact 18-1 contacts the power supply slide rail 17. To improve the stability of contact power taking, as Figure 3 shown, a spherical part is provided at the end of the power connection contact 18-1, and an elastic part 18-2 is provided at the rear of the end of the power connection contact 18-1.

[0066] In other embodiments, the way the magnetic force control unit supplies power to the electromagnet 18 can also be inductive power supply. The magnetic force control unit includes an excitation coil arranged in the adsorption area and extending to the outer edge of the collection area. An induction coil is provided on the electromagnet 18 to cooperate with the excitation coil. The excitation coil is energized to generate an excitation magnetic field, and the excitation coil supplies power to the induction coil on the electromagnet 18 through electromagnetic induction to make the electromagnet 18 generate magnetism.

[0067] In another embodiment, the magnetic force generating unit is the electromagnet 18. The electromagnet 18 is connected with a capacitor energy storage module. By designing the magnetic force control unit, the capacitor energy storage module of the magnetic force generating unit is charged in the collection area and extends along the transmission direction of the conveyor belt 1 before reaching the adsorption area. The capacitor energy storage module discharges in the adsorption area and extends to the outer edge of the collection area. The electromagnet 18 generates magnetism to provide magnetic suction. When the magnetic force generating unit rotates to the collection area, the discharge of the capacitor energy storage module is completed, and the electromagnet 18 loses magnetism, realizing the automatic separation of iron powder. As Figure 4 shown, the magnetic force control unit is arranged in the collection area and extends along the transmission direction of the conveyor belt 1 before reaching the adsorption area. The magnetic force control unit is used to charge the capacitor energy storage module. The electromagnet 18 generates magnetic force through the discharge of the capacitor energy storage module in the adsorption area and loses magnetic force in the collection area due to the depletion of the electrical energy stored in the capacitor energy storage module. The way the magnetic force control unit charges the capacitor energy storage module can also be contact charging. As Figure 5 shown, the magnetic force control unit includes a charging slide rail 19 arranged on the side of the conveyor belt 1. A power connection contact 18-1 is provided on the side of the electromagnet 18 to cooperate with the charging slide rail. When the power connection contact 18-1 contacts the charging slide rail 19, the electromagnet 18 is energized to charge the capacitor energy storage module. When the power connection contact 18-1 disengages from the charging slide rail 19, the capacitor energy storage module discharges to the electromagnet 18 to make the electromagnet 18 generate a magnetic field. To improve the stability of contact power taking, asFigure 5 As shown, the end of the power connection contact 18-1 is provided with a spherical part, and an elastic member 18-2 is provided at the rear of the end of the power connection contact 18-1.

[0068] In order to further improve the adsorption effect on the iron powder scattered on the roadbed 7 and the rail 8, as Figure 6 and Figure 7 shown, the outer surface of the conveyor belt 1 can be provided with a groove 1-1-1 that fits the top of the rail 8 along its length direction, and the magnetic layer 1-2 is arranged conformally. With such a setting, the magnetic layer 1-2 can be closer to both sides of the rail 8 and the roadbed 7, enhancing the adsorption effect on the iron powder. As Figure 6 shown in the setting, the force exerted by the top of the rail 8 on the conveyor belt 1 will cause the magnetic layer 1-2 to be stressed. In order to improve the stress condition of the magnetic layer 1-2 and extend the service life of the device, a support wheel 3-1 can be provided at the corresponding position inside the conveyor belt 1 above the top of the rail 8.

[0069] As Figure 1 shown, the collection system includes a dust collection box 15, a negative pressure conveying system, and a storage box 10. The dust collection box 15 is located below the collection area, and the negative pressure conveying system is connected to the dust collection box 15 and the storage box 10 through a pipeline 12. In this embodiment, the negative pressure conveying system is a vacuum amplifier 11. The top of the dust collection box 15 is provided with a dust collection box bell mouth 13 to expand the collection area. An electrical control box 9 is provided beside the dust collection box 15. By setting the negative pressure conveying system, the collection effect when the iron powder falls can be enhanced, avoiding environmental pollution.

[0070] The working principle of this device is as follows:

[0071] By setting a magnetic force generation unit and a magnetic force control unit, the magnetic layer 1-2 of the conveyor belt 1 is demagnetized when it rotates to the collection area, realizing the automatic separation of the iron powder under the action of its own weight, so that the iron powder magnetic collection device realizes the continuous and automatic collection of the iron powder, improving the operation efficiency of cleaning the iron powder on the roadbed 7.

[0072] In summary, the iron powder magnetic collection device for railway roadbed provided by the present invention enables the iron powder magnetic collection device to continuously adsorb iron powder in the adsorption area and automatically release the iron powder in the collection area through the cyclic rotation of the conveyor belt 1 and the precise control of the magnetic force control unit over the magnetic force generation unit, without manual intervention, realizing the continuous and automatic collection of the iron powder and improving the operation efficiency of cleaning the iron powder on the railway roadbed.

[0073] Although the present invention has been described with reference to the preferred embodiments, various modifications can be made thereto and components thereof can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An iron powder magnetic collection device for railway track bed, characterized in that: include: Car body, conveyor belt system, magnetic force generating unit, magnetic force control unit and collection system; The vehicle body is used to carry the conveyor belt system, the magnetic force generating unit, the magnetic force control unit and the collection system; The conveyor belt system comprises a rotatable conveyor belt, the conveyor belt at least comprises a magnetic layer, the conveyor belt system is provided with an adsorption area and a collection area, the adsorption area is located at one end of the conveyor belt close to the ballast bed; The magnetic force generating unit is arranged in the magnetic layer of the conveyor belt and is used to generate magnetic attraction to adsorb iron powder in the adsorption area; The magnetic force control unit is configured to disable the magnetic force of the magnetic force generating unit in the collecting area, so that the adsorbed iron powder is separated and falls into the collecting system.

2. The iron powder magnetic collection device for railway track bed according to claim 1, characterized in that: The conveyor belt system also includes a driving mechanism for driving the conveyor belt to cyclically rotate.

3. The iron powder magnetic collection device for railway track bed according to claim 2, characterized in that: A magnetic force strengthening unit is also provided at the adsorption area, and the magnetic force strengthening unit is located on the inner side of one end of the conveyor belt close to the roadbed.

4. The iron powder magnetic collection device for railway track bed according to claim 2, characterized in that: The magnetic force generating unit is a permanent magnet, the magnetic force controlling unit is a demagnetizing device, the demagnetizing device is arranged on the inner side of the conveyor belt at the collecting area, and the demagnetizing device generates a magnetic field opposite to the magnetic field of the permanent magnet.

5. The iron powder magnetic collection device for railway track bed according to claim 2, characterized in that: The magnetic force generating unit is an electromagnet, the magnetic force control unit is arranged in the adsorption area and extends to the outer edge of the collection area, and the magnetic force control unit supplies power to the electromagnet.

6. The iron powder magnetic collection device for railway track bed according to claim 5, characterized in that: The magnetic control unit supplies power to the electromagnet in a contact-type manner. The magnetic control unit includes a power supply rail arranged on the side of the conveyor belt. The side of the electromagnet is provided with a power contact that cooperates with the power supply rail. When the power contact contacts the power supply rail, the electromagnet is energized to generate a magnetic field.

7. The iron powder magnetic collection device for railway track bed according to claim 2, characterized in that: The magnetic force generating unit is an electromagnet, which is connected to a capacitor energy storage module. The magnetic force control unit is arranged in the collection area and extends along the transmission direction of the conveyor belt to before the adsorption area. The magnetic force control unit is used to charge the capacitor energy storage module. The electromagnet generates magnetic force by discharging through the capacitor energy storage module in the adsorption area. The magnetic force fails in the collection area due to the exhaustion of the electric energy stored in the capacitor energy storage module.

8. The iron powder magnetic collection device for railway track bed according to claim 7, characterized in that: The magnetic control unit charges the capacitive energy storage module by contact charging. The magnetic control unit includes a charging slide rail arranged on the side of the conveyor belt, and the side of the electromagnet is provided with an electrical contact point that cooperates with the charging slide rail.

9. The iron powder magnetic collection device for railway track bed according to claim 2, characterized in that: The outer surface of the conveyor belt is provided with a groove matching the top of the rail along its length direction, and the magnetic layer is arranged in accordance with the shape.

10. The iron powder magnetic collection device for railway track bed according to any one of claims 1 to 9, characterized in that: The collection system comprises a dust box, a negative pressure conveying system and a storage box. The dust box is located below the collection area. The negative pressure conveying system connects the dust box and the storage box through a pipeline.

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