Permanent magnet rail demagnetizer

Abstract

The application discloses a permanent magnet rail degaussing device and relates to the technical field of rail degaussing.The permanent magnet rail degaussing device comprises a shell and a degaussing assembly arranged on the inner wall of the shell; the shell comprises a top mounting plate and first and second side mounting plates arranged on the two sides of the bottom of the top mounting plate; the bottom of the top mounting plate is provided with a pulley which slides along the rail; the degaussing assembly comprises a top degaussing group, a rail head degaussing group and a rail waist degaussing group which generate continuously commutated degaussing magnetic fields respectively; the top degaussing group is arranged on the top mounting plate; and the first and second side mounting plates are both provided with the rail head degaussing group and the rail waist degaussing group oppositely. The top degaussing group, the rail head degaussing group and the rail waist degaussing group generate continuously commutated degaussing magnetic fields respectively, so that the main circuit breaker of the motor train unit does not abnormally jump, thereby solving the problem that the existing degaussing method and degaussing device cannot be applied to the rail.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rail demagnetization, in particular to a permanent magnet rail demagnetization device. BACKGROUND

[0002] The description of the background of the present application belongs to the related art related to the present application, and is only used to illustrate and facilitate the understanding of the content of the present application, and should not be understood as the applicant's explicit recognition or presumption that the present application is the prior art on the date of the first application.

[0003] Nowadays, China's electrified railway adopts single-phase power frequency alternating current power supply system. In order to balance the three-phase power supply load, the motor train unit needs to be operated after driving a distance. The motor train unit is completed in a non-electric area, and the automatic opening and closing of the main circuit breaker is controlled by the ground magnetic steel magnetic signal sensed by the vehicle sensor. Some sections of some railways have occurred many times. The specific reason is that when the motor train unit automatically operates the neutral section, the abnormal magnetic induction signal emitted by the ground is received, causing the main circuit breaker of the motor train unit to abnormally open. According to the measurement and investigation of relevant staff, it is found that the abnormal magnetic signal of the ground comes from the magnetized rail, which is scattered in several points in the section where the accident occurred. In order to avoid the abnormal jump of the main circuit breaker and ensure the safety of passengers, the ground rail needs to be demagnetized.

[0004] The demagnetization method of oil and gas pipelines similar in size to the rail is investigated, mainly using direct current demagnetization method and alternating current demagnetization method. These two methods are convenient and efficient for steel pipe demagnetization, but they are not suitable for rail demagnetization. Because the direct current demagnetization method and the alternating current demagnetization method need to wind the coil around the steel pipe and need power supply, and for rail demagnetization, the rail is in service on the line, and cannot be wound with a coil, and the rail demagnetization often operates in the field, and the power supply is not convenient. In view of this situation, some people have designed a kind of oil and gas pipeline permanent magnet demagnetization device, that is, using N and S pole alternating magnet ring to replace the alternating current to achieve the same alternating magnetic field effect, but the demagnetization effect of the device is not good. SUMMARY

[0005] The purpose of the present application is to provide a permanent magnet rail demagnetization device to solve the problem that the existing demagnetization method and demagnetization device cannot be applied to the rail.

[0006] The technical scheme for solving the above technical problems of the present application is as follows:

[0007] The permanent magnet rail degaussing device comprises a shell and a degaussing assembly arranged on the inner wall of the shell; the shell comprises a top mounting plate and a first side mounting plate and a second side mounting plate arranged on the two sides of the bottom of the top mounting plate respectively, forming an inlet side and an outlet side; the bottom of the top mounting plate is provided with a pulley sliding along the rail; the degaussing assembly comprises a top degaussing group, a rail head degaussing group and a rail waist degaussing group generating continuously commutated degaussing magnetic fields respectively, the top degaussing group is arranged on the top mounting plate, and the first side mounting plate and the second side mounting plate are both provided with the rail head degaussing group and the rail waist degaussing group.

[0008] The beneficial effects of the above technical scheme are that the rail is located in the shell, the pulley is in contact with the top of the rail, the top degaussing group is arranged on the top of the rail, the rail head degaussing group is arranged on the two sides of the rail head of the rail, and the rail waist degaussing group is arranged on the two sides of the rail waist of the rail; under the action of the pulley, the shell slides along the rail; since the top degaussing group, the rail head degaussing group and the rail waist degaussing group generate continuously commutated degaussing magnetic fields respectively, the source of the abnormal magnetic signal on the ground can be eliminated, the main circuit breaker of the motor train unit no longer abnormally jumps, and the top, the rail head and the rail waist of the rail can be degaussed in a targeted manner, and the degaussing is more uniform.

[0009] Further, the top degaussing group, the rail head degaussing group and the rail waist degaussing group each comprise a plurality of magnets and fixing assemblies used in combination, and the two ends of the magnet are connected to the corresponding mounting plate through the fixing assembly.

[0010] Further, the magnets on the same mounting plate are arranged in a straight line, and the adjacent magnets repel each other.

[0011] The beneficial effects of the above technical scheme are that the type of the magnet is determined according to the magnetic field distribution characteristics of the magnet, so that the material, shape and size of the permanent magnet are determined through numerical calculation and simulation analysis of the magnet, and then the layout of the magnet is designed based on the structure of the rail using the hysteresis loops corresponding to different residual magnetism of the rail, and further the structure shape of the degaussing device is designed.

[0012] Further, the fixing member comprises a pressing plate and a fastener, the pressing plate is provided with a groove for pressing the magnet, and the two ends of the pressing plate are connected to the corresponding mounting plate through the fastener.

[0013] Further, a plurality of limiting blocks for limiting the magnet are arranged on the top mounting plate, the first side mounting plate and the second side mounting plate respectively, and the plurality of limiting blocks form a limiting cavity.

[0014] Further, the top mounting plate, the first side mounting plate and the second side mounting plate are each provided with a stepped plate with a height decreasing from the inlet side to the outlet side, and the magnet is arranged on each step of the stepped plate.

[0015] The beneficial effects of the above technical scheme are that: the step plates are arranged on the top mounting plate, the first side mounting plate and the second side mounting plate, so that a certain height difference is formed between the magnets of the top demagnetization group, the rail head demagnetization group and the rail waist demagnetization group, and adjacent magnets repel each other, so as to equivalently realize the traditional demagnetization magnetic field which is continuously commutated and gradually reduced.

[0016] Further, the outer walls of the top mounting plate, the first side mounting plate and the second side mounting plate are respectively provided with handles.

[0017] Further, the length of the top mounting plate extends out of the first side mounting plate and the second side mounting plate, the number of pulleys is 2, and the two pulleys are respectively arranged at the extension positions.

[0018] Further, shockproof clamping strips are respectively arranged on the two sides of the two pulleys, and the top ends of the shockproof clamping strips are connected with the top mounting plate.

[0019] Further, pull rods are arranged on the inlet side or the outlet side, and the two end sidewalls of the top mounting plate are respectively provided with hinged seats for connecting the pull rods.

[0020] The present application has the following beneficial effects:

[0021] The present application can eliminate the source of abnormal magnetic signals on the ground, so that the abnormal jump of the motor train unit main circuit breaker no longer occurs, and the demagnetization of the top, rail head and rail waist of the steel rail can be targeted and more uniform. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a structural schematic view of the permanent magnet steel rail demagnetization device.

[0023] Figure 2 It is a structural schematic view of the top mounting plate.

[0024] Figure 3 It is a structural schematic view of the first side mounting plate.

[0025] Figure 4 It is a structural schematic view of the shockproof clamping strip.

[0026] In the figure: 1 - shell; 11 - inlet side; 12 - outlet side; 101 - top mounting plate; 102 - first side mounting plate; 103 - second side mounting plate; 2 - pulley; 31 - top demagnetization group; 32 - rail head demagnetization group; 33 - rail waist demagnetization group; 301 - magnet; 302 - fixing assembly; 321 - pressing sheet; 322 - fastener; 323 - limiting block; 303 - step plate; 4 - handle; 5 - shockproof clamping strip; 6 - pull rod; 601 - hinged seat; 7 - steel rail. DETAILED DESCRIPTION

[0027] The principles and features of the present application are described below in conjunction with the accompanying drawings, in which the examples are used to explain the present application and are not intended to limit the scope of the present application.

[0028] Please refer to Figure 1 A permanent magnet rail degaussing device, comprising a shell 1 and a degaussing assembly arranged on the inner wall of the shell 1, the shell 1 is provided with an inlet side 11 and an outlet side 12, and the bottom of the shell 1 is provided with a pulley 2 sliding along the rail 7. The degaussing assembly comprises a plurality of top degaussing groups 31, rail head degaussing groups 32 and rail waist degaussing groups 33 respectively generating continuously commutated degaussing magnetic fields, the top degaussing groups 31 are arranged at the top of the shell 1, and the rail head degaussing groups 32 and the rail waist degaussing groups 33 are arranged on both sides of the shell 1. The rail 7 is located in the shell 1, the pulley 2 is in contact with the top of the rail 7, the top degaussing groups 31 are arranged at the top of the rail 7, the rail head degaussing groups 32 are arranged on both sides of the rail head of the rail 7, and the rail waist degaussing groups 33 are arranged on both sides of the rail waist of the rail 7. Under the action of the pulley 2, the shell 1 slides along the rail 7, and since the top degaussing groups 31, the rail head degaussing groups 32 and the rail waist degaussing groups 33 respectively generate continuously commutated degaussing magnetic fields, the source of the abnormal magnetic signal on the ground can be eliminated, the main circuit breaker of the motor train set no longer abnormally jumps, and the top, rail head and rail waist of the rail 7 can be degaussed in a targeted manner, the degaussing is more uniform, and the problem that the existing degaussing method and degaussing device cannot be applied to the rail is solved.

[0029] Please refer to Figure 2 and Figure 3 , the shell 1 comprises a top mounting plate 101 and first and second side mounting plates 102 and 103 arranged on both sides of the bottom of the top mounting plate 101 respectively, and the top mounting plate 101 is connected with the first and second side mounting plates 102 and 103 by bolts. One side of the top mounting plate 101, the first side mounting plate 102 and the second side mounting plate 103 forms the inlet side 11, and the other side forms the outlet side 12. The top mounting plate 101, the first side mounting plate 102 and the second side mounting plate 103 are all provided with stepped plates 303 with heights decreasing in sequence along the direction from the inlet side 11 to the outlet side 12, that is, the height of the stepped plate 303 on the inlet side 11 is higher, and the stepped plate 303 is a plate provided with three steps. It is worth noting that in this embodiment, the optimal size of the top mounting plate 101 is 40mm*20mm*10mm, which can cover the top surface of the rail 7.

[0030] Please refer to Figure 4The outer walls of the top mounting plate 101, the first side mounting plate 102 and the second side mounting plate 103 are respectively provided with handles 4, and handles 4 are additionally provided on the three plates to facilitate disassembly and assembly of the degaussing device. The length of the top mounting plate 101 extends the first side mounting plate 102 and the second side mounting plate 103, and the number of pulleys 2 is 2, and the two pulleys 2 are respectively arranged at the extension. Two shockproof clamping strips 5 are respectively arranged on the two sides of the two pulleys 2, the top end of the shockproof clamping strip 5 is connected with the top mounting plate 101, and the bottom end of the shockproof clamping strip 5 extends to the rail waist of the steel rail. The pulley 2 is used to facilitate the sliding of the degaussing device on the steel rail 7, because the bottom of the steel rail 7 on the railway site is often hindered by other fixed facilities, so the pulley 2 is arranged at the top, and the shockproof clamping strip 5 can be clamped on the top of the steel rail 7, so that the degaussing device does not shake left and right during walking on the steel rail 7, and can move straight. The pulley 2 and the shockproof clamping strip 5 are respectively arranged on the import side 11 and the export side 12, and are fixed on the top mounting plate 101 by fixing bolts.

[0031] The two end side walls of the top mounting plate 101 are respectively used to connect the hinge seats 601 of the pull rods 6, and the interfaces for connecting the pull rods 6 are arranged on the import side 11 and the export side 12 of the degaussing device, and the pull rods 6 can be used by being bolted.

[0032] The top degaussing group 31, the rail head degaussing group 32 and the rail waist degaussing group 33 all include multiple groups of matched magnets 301 and fixing assemblies 302, the magnets 301 are arranged on the corresponding mounting plates, the two ends of the magnet 301 are connected with the corresponding mounting plate through the fixing assembly 302, the magnets 301 on the same mounting plate are arranged in a straight line, and the adjacent magnets 301 repel each other. According to the magnetic field distribution characteristics of the magnet 301, the type of the magnet 301 is determined, so that the material, shape and size of the permanent magnet 301 are determined through numerical calculation and simulation analysis of the magnet 301. The layout of the magnet 301 is designed based on the structure of the steel rail 7 by using the different residual magnetism corresponding hysteresis loops of the steel rail 7, and then the structure shape of the degaussing device is designed.

[0033] In the embodiment, the top degaussing group 31, the rail head degaussing group 32 and the rail waist degaussing group 33 are respectively provided with three groups of matched magnets 301 and fixing assemblies 302, the top mounting plate 101 is provided with one step plate 303, the first side mounting plate 102 and the second side mounting plate 103 are respectively provided with two step plates 303, and one group of matched magnets 301 and fixing assemblies 302 are arranged on the three steps of the step plate 303. In other embodiments, more or less than three groups of matched magnets 301 and fixing assemblies 302 can be arranged according to the use requirement. In order to meet the requirement that the magnetic field gradually decreases when the magnet 301 passes through the surface of the rail 7, the top mounting plate 101, the first side mounting plate 102 and the second side mounting plate 103 are respectively provided with the step plate 303. In order to meet the requirement that the direction of the magnetic field changes when the magnet 301 passes through the surface of the rail 7, the magnets 301 are arranged in an N-S-N arrangement. In this way, the degaussing device passes through the surface of the rail 7 to generate a magnetic field which is reversed and has a decreasing amplitude.

[0034] A plurality of limiting blocks 323 for limiting the magnet 301 are arranged on the top mounting plate 101, the first side mounting plate 102 and the second side mounting plate 103, and the plurality of limiting blocks 323 form a limiting cavity. The fixing member includes a pressing sheet 321 and a fastener 322, and the fastener 322 is a bolt. The pressing sheet 321 is provided with a groove for pressing the magnet 301. The two ends of the pressing sheet 321 are respectively connected to the corresponding mounting plate through the fastener 322. During the installation of the magnet 301, the magnet 301 is first placed in the limiting cavity, then the magnet 301 is pressed by the pressing sheet 321, and finally the magnet 301 is fixed on the corresponding plate by the fastener 322. The strength of the pressing sheet 321 can withstand the suction force of the magnet 301 during the degaussing process.

[0035] When simulating the degaussing device and processing the physical diagram, the material should be a metal material which does not affect the magnetic field.

[0036] The above is only a preferred embodiment of the present application, and is not used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A demagnetizing device for permanent magnet rails, characterized in that, include: The housing (1) and the demagnetizing assembly disposed on the inner wall of the housing (1); The housing (1) includes a top mounting plate (101) and a first side mounting plate (102) and a second side mounting plate (103) respectively disposed on the bottom sides of the top mounting plate (101), forming an inlet side (11) and an outlet side (12). The bottom of the top mounting plate (101) is provided with a pulley (2) that slides along the rail (7); The demagnetizing assembly includes a top demagnetizing group (31), a rail head demagnetizing group (32), and a rail waist demagnetizing group (33) that generate demagnetizing magnetic fields that continuously change direction. The top demagnetizing group (31) is disposed on the top mounting plate (101), and the first side mounting plate (102) and the second side mounting plate (103) are both provided with the rail head demagnetizing group (32) and the rail waist demagnetizing group (33). The top demagnetizing group (31), the rail head demagnetizing group (32), and the rail waist demagnetizing group (33) each include multiple sets of matching magnets (301) and fixing components (302). The two ends of the magnets (301) are respectively connected to the corresponding mounting plates through the fixing components (302). The magnets (301) on the same mounting plate are arranged in a straight line, and the magnetic poles of adjacent magnets (301) repel each other; The top mounting plate (101), the first side mounting plate (102) and the second side mounting plate (103) are all provided with step plates (303) whose height decreases sequentially from the inlet side (11) to the outlet side (12), and each step of the step plate (303) is provided with the magnet (301).

2. The permanent magnet rail demagnetization device according to claim 1, characterized in that, The fixing component (302) includes a pressure plate (321) and a fastener (322). The pressure plate (321) is provided with a groove for pressing the magnet (301). Both ends of the pressure plate (321) are respectively connected to the corresponding mounting plate through the fastener (322).

3. The permanent magnet rail demagnetization device according to claim 1, characterized in that, The top mounting plate (101), the first side mounting plate (102) and the second side mounting plate (103) are respectively provided with a plurality of limiting blocks (323) for limiting the magnet (301), and the plurality of limiting blocks (323) form a limiting cavity.

4. The permanent magnet rail demagnetization device according to claim 1, characterized in that, The outer walls of the top mounting plate (101), the first side mounting plate (102) and the second side mounting plate (103) are respectively provided with handles (4).

5. The permanent magnet rail demagnetization device according to claim 1, characterized in that, The length of the top mounting plate (101) extends to the first side mounting plate (102) and the second side mounting plate (103), and the number of pulleys (2) is 2, with the two pulleys (2) respectively disposed at the extension.

6. The permanent magnet rail demagnetization device according to claim 1, characterized in that, Two anti-vibration strips (5) are provided on both sides of the two pulleys (2), and the top of the anti-vibration strips (5) are connected to the top mounting plate (101).

7. The permanent magnet rail demagnetization device according to any one of claims 1 to 6, characterized in that, A pull rod (6) is provided on the inlet side (11) or the outlet side (12), and hinge seats (601) for connecting the pull rod (6) are respectively provided on the two side walls of the top mounting plate (101).

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