Overload protection device for railway traction power supply system

Abstract

The utility model provides an overload protection device for a railway traction power supply system, and relates to the technical field of overload protection. The overload protection device for the railway traction power supply system comprises a shell, a controller and an electric control switch are installed in the shell, the electric control switch is electrically connected with the controller, and a handle part of the electric control switch penetrates through an opening formed in the shell and extends out of the shell; the electric connecting seat is connected with the outer surface of the shell; the auxiliary control mechanism is connected into the shell, the auxiliary control mechanism comprises a partition plate, the partition plate is fixedly connected into the shell, the partition plate is elastically and rotatably connected with a rotating shaft, and the outer surface of the rotating shaft is fixedly connected with a magnetic plate; a proximity switch is installed on the inner bottom wall of the shell, and triggering of the proximity switch is achieved through rotation of the magnetic plate. And electromagnets are mounted on the outer surfaces of the partition plates. The overload protection device for the railway traction power supply system provided by the utility model has the advantage of high use reliability.

Description

Technical Field

[0001] The utility model relates to the technical field of overload protection, in particular to an overload protection device for a railway traction power supply system. Background Art

[0002] The railway traction power supply system is an indispensable key facility in modern railway transportation. It provides power for trains. In order to ensure the safety and efficiency of railway transportation, it is necessary to install an overload protection device in the railway traction power supply system circuit.

[0003] The existing overload protection device of the railway traction power supply system is generally a relay, and currently, overload protection is generally achieved through a single form of relay. When the relay fails, it will affect the effect of the overload protection and further affect the reliability of the device.

[0004] Therefore, it is necessary to provide a new overload protection device for railway traction power supply system to solve the above technical problems. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a railway traction power supply system overload protection device with high reliability.

[0006] The utility model provides an overload protection device for a railway traction power supply system, comprising: a shell, a controller and an electric switch are installed in the shell, the electric switch is electrically connected to the controller, and a handle of the electric switch passes through an opening provided in the shell and extends to the outside of the shell; an electric connection seat, the electric connection seat is connected to the outer surface of the shell; an auxiliary control mechanism, the auxiliary control mechanism is connected in the shell, and the auxiliary control mechanism comprises a partition, the partition is fixedly connected in the shell, and the partition is elastically rotatably connected to a rotating shaft, and a magnetic plate is fixedly connected to the outer surface of the rotating shaft; a proximity switch is installed on the inner bottom wall of the shell, and the proximity switch is triggered by the rotation of the magnetic plate; an electromagnet is installed on the outer surface of the partition, and the electromagnet is electrically connected to the electric connection seat; the electromagnet and the magnetic plate are arranged in alignment, and the magnetism of the electromagnet and the opposite ends of the magnetic plate are the same.

[0007] Preferably, one end of the rotating shaft is fixedly connected to one end of the spiral spring, and the other end of the spiral spring is fixedly connected to the partition.

[0008] Preferably, an end plate is fixedly connected inside the shell, and the end plate, partition plate and inner wall of the shell divide the interior of the shell into two mutually sealed first installation chamber and second installation chamber, the rotating shaft, electromagnet and spiral spring are installed in the first installation chamber, and the electric control switch and controller are located in the second installation chamber.

[0009] Preferably, the shell wall of the shell is provided with an internal threaded hole interconnected with the first installation bin, the internal threaded hole is sealed with a sealing cover, and the outer surface of the sealing cover is fixedly connected with a handle.

[0010] Preferably, the shell is fixedly connected with a plurality of heat dissipation pipes with openings at both ends, the heat dissipation pipes are arranged through the shell, and the heat dissipation pipes are arranged close to the controller.

[0011] Preferably, a plurality of heat dissipation fins are fixedly connected to the upper surface of the shell and are arranged through the upper surface of the shell, and the heat dissipation fins are located directly above the controller.

[0012] Preferably, the upper surface of the shell is rotatably connected with fan blades, and the fan blades are located above the heat dissipation fins.

[0013] Compared with the related art, the railway traction power supply system overload protection device provided by the utility model has the following beneficial effects:

[0014] 1. During the use of the utility model, when one of the electric control switch or the electromagnet fails, the device can still open the railway traction power supply circuit normally. The device has two sets of protection devices, realizes two overload protection devices, and improves the reliability of the device;

[0015] 2. The first installation chamber and the second installation chamber in the utility model are sealed with each other, and the spiral spring, electromagnet, proximity switch and other components are located in the first installation chamber, and the first installation chamber is relatively sealed, which reduces the probability of failure or even damage of the above components and improves the reliability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The present invention is a schematic structural diagram of a preferred embodiment of the overload protection device for a railway traction power supply system provided by the present invention.

[0017] Figure 2 for Figure 1 The diagram shows a partial cross-sectional structural diagram of an overload protection device for a railway traction power supply system.

[0018] Figure 3 for Figure 2 The schematic diagram of the installation structure of the auxiliary control mechanism is shown.

[0019] Figure 4 for Figure 1 The schematic diagram of the structure of the overload protection device of the railway traction power supply system is shown in the oblique direction.

[0020] Numbers in the figure: 1. fan blade; 2. housing; 3. electrical connection socket; 4. heat dissipation pipe; 5. electric control switch; 6. auxiliary control mechanism; 61. magnetic plate; 62. electromagnet; 63. partition; 64. rotating shaft; 65. scroll spring; 66. proximity switch; 7. controller; 8. heat dissipation fin; 9. end plate; 101. sealing cover. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings and implementation modes.

[0022] Please refer to Figures 1 to 4 , a railway traction power supply system overload protection device comprises: a housing 2, a controller 7 and an electric control switch 5 are installed in the housing 2, the electric control switch 5 is electrically connected to the controller 7, and a handle of the electric control switch 5 passes through an opening of the housing 2 and extends to the outside of the housing 2;

[0023] An electrical connection socket 3 connected to the outer surface of the housing 2;

[0024] The auxiliary control mechanism 6 is connected in the shell 2, and the auxiliary control mechanism 6 includes a partition 63, the partition 63 is fixedly connected in the shell 2, and the partition 63 is elastically rotatably connected to a rotating shaft 64, and the outer surface of the rotating shaft 64 is fixedly connected to a magnetic plate 61; a proximity switch 66 is installed on the inner bottom wall of the shell 2, and the proximity switch 66 is triggered by the rotation of the magnetic plate 61; an electromagnet 62 is installed on the outer surface of the partition 63, and the electromagnet 62 is electrically connected to the electrical connection seat 3; the electromagnet 62 and the magnetic plate 61 are aligned, and the magnetism of the electromagnet 62 and the opposite ends of the magnetic plate 61 are the same.

[0025] It should be noted that the railway traction power supply circuit is electrically connected to the electric control switch 5 and the controller 7 through the electrical connection socket 3. When the railway traction power supply circuit is overloaded, the controller 7 disconnects the electric control switch 5, so that the railway traction power supply circuit is open, thereby achieving overload protection;

[0026] It is also necessary to explain that the railway traction power supply circuit is also electrically connected to the electromagnet 62; when the electric control switch 5 fails and the railway traction power supply circuit is overloaded, the current of the railway traction power supply circuit increases, the current passing through the electromagnet 62 increases, and then the magnetic force of the electromagnet 62 increases. Since the magnetism of the electromagnet 62 and the opposite end of the magnetic plate 61 is the same, a magnetic repulsion force is generated between the electromagnet 62 and the magnetic plate 61. Under the action of the magnetic repulsion force, the magnetic plate 61 rotates elastically, and then the proximity switch 66 is triggered through the magnetic plate 61, so that the railway traction power supply circuit is opened, and overload protection can also be achieved; conversely, when the electromagnet 62 fails and the railway traction power supply circuit is overloaded, the railway traction power supply circuit can also be opened through the electric control switch 5;

[0027] In summary, when one of the electric-controlled switch 5 or the electromagnet 62 fails, the device can still open the railway traction power supply circuit normally. The device has two sets of protection devices, realizes two overload protection devices, and improves the reliability of the device.

[0028] refer to Figure 3 As shown, one end of the rotating shaft 64 is fixedly connected to one end of the spiral spring 65, and the other end of the spiral spring 65 is fixedly connected to the partition plate 63.

[0029] It should be noted that the rotating shaft 64 is elastically rotatably connected to the partition plate 63 through the spiral spring 65 .

[0030] refer to Figure 2 and Figure 3 As shown, an end plate 9 is fixedly connected to the shell 2, and the end plate 9, the partition plate 63 and the inner wall of the shell 2 divide the interior of the shell 2 into two mutually sealed first installation chamber and second installation chamber, the rotating shaft 64, the electromagnet 62, and the spiral spring 65 are installed in the first installation chamber, and the electric control switch 5 and the controller 7 are located in the second installation chamber.

[0031] It should be noted that the handle portion of the electric control switch 5 needs to extend to the outside of the housing 2, that is, the second mounting chamber is connected to the external environment. Since the first mounting chamber and the second mounting chamber are sealed to each other, and components such as the spiral spring 65, the electromagnet 62, and the proximity switch 66 are located in the first mounting chamber, and the first mounting chamber is relatively sealed, the probability of failure or even damage of the above-mentioned components is reduced, thereby improving the reliability of the device.

[0032] refer to Figure 4 As shown, the shell wall of the shell 2 is provided with an internal threaded hole interconnected with the first installation chamber, the internal threaded hole is sealed with a sealing cover 101, and the outer surface of the sealing cover 101 is fixedly connected with a handle.

[0033] It should be noted that the sealing cover 101 can be conveniently opened by turning the handle, which is convenient for inspecting and repairing the components in the first installation chamber.

[0034] refer to Figure 1 and Figure 2 As shown, the shell 2 is fixedly connected with a plurality of heat dissipation tubes 4 with openings at both ends, the heat dissipation tubes 4 are arranged through the shell 2, and the heat dissipation tubes 4 are arranged close to the controller 7; the upper surface of the shell 2 is fixedly connected with a plurality of heat dissipation fins 8 arranged through it, and the heat dissipation fins 8 are located directly above the controller 7.

[0035] It should be noted that the heat dissipation of the controller 7 can be achieved through the heat dissipation pipe 4 and the heat dissipation fins 8, reducing the probability of the controller 7 failing due to excessive temperature, which is beneficial to the use of the device;

[0036] It is also necessary to explain that the two ends of the heat dissipation tube 4 are open, so that an air channel is formed inside the heat dissipation tube 4, which is conducive to the circulation of air and improves the heat dissipation effect.

[0037] refer to Figure 1 As shown, the upper surface of the housing 2 is rotatably connected with a fan blade 1, and the fan blade 1 is located above the heat dissipation fin 8.

[0038] It should be noted that when the device is installed outdoors, the fan blades 1 can be driven to rotate under the action of external wind. The rotation of the fan blades 1 can increase the speed of air circulation around the heat dissipation fins 8, which is beneficial to the heat dissipation of the heat dissipation fins 8 and further beneficial to the heat dissipation of the controller 7.

[0039] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A railway traction power supply system overload protection device, characterized in that: include: A housing (2), wherein a controller (7) and an electric control switch (5) are installed in the housing (2), the electric control switch (5) is electrically connected to the controller (7), and a handle portion of the electric control switch (5) passes through an opening formed in the housing (2) and extends to the outside of the housing (2); An electrical connection seat (3), the electrical connection seat (3) being connected to the outer surface of the shell (2); An auxiliary control mechanism (6), the auxiliary control mechanism (6) is connected in a housing (2), and the auxiliary control mechanism (6) comprises a partition (63), the partition (63) is fixedly connected in the housing (2), and the partition (63) is elastically rotatably connected to a rotating shaft (64), and the outer surface of the rotating shaft (64) is fixedly connected to a magnetic plate (61); a proximity switch (66) is installed on the inner bottom wall of the housing (2), and the proximity switch (66) is triggered by the rotation of the magnetic plate (61); an electromagnet (62) is installed on the outer surface of the partition (63), and the electromagnet (62) is electrically connected to an electrical connection seat (3); the electromagnet (62) and the magnetic plate (61) are arranged in alignment, and the magnetism of the opposite ends of the electromagnet (62) and the magnetic plate (61) is the same.

2. The overload protection device for railway traction power supply system according to claim 1, characterized in that: One end of the rotating shaft (64) is fixedly connected to one end of a spiral spring (65), and the other end of the spiral spring (65) is fixedly connected to a partition plate (63).

3. The overload protection device for railway traction power supply system according to claim 1, characterized in that: An end plate (9) is fixedly connected to the shell (2); the end plate (9), the partition plate (63) and the inner wall of the shell (2) divide the interior of the shell (2) into two mutually sealed first installation chambers and a second installation chamber; the rotating shaft (64), the electromagnet (62) and the spiral spring (65) are installed in the first installation chamber, and the electric control switch (5) and the controller (7) are located in the second installation chamber.

4. The overload protection device for railway traction power supply system according to claim 3, characterized in that: The shell wall of the shell (2) is provided with an internal threaded hole which is in communication with the first installation chamber, the internal threaded hole is sealed with a sealing cover (101), and the outer surface of the sealing cover (101) is fixedly connected with a handle.

5. The railway traction power supply system overload protection device according to any one of claims 1 to 4, characterized in that: The housing (2) is fixedly connected with a plurality of heat dissipation pipes (4) with openings at both ends. The heat dissipation pipes (4) are arranged to penetrate the housing (2), and the heat dissipation pipes (4) are arranged close to the controller (7).

6. The overload protection device for railway traction power supply system according to claim 5, characterized in that: A plurality of heat dissipation fins (8) are fixedly connected to the upper surface of the housing (2) and are arranged to penetrate the housing. The heat dissipation fins (8) are located directly above the controller (7).

7. The overload protection device for railway traction power supply system according to claim 6, characterized in that: The upper surface of the housing (2) is rotatably connected to a fan blade (1), and the fan blade (1) is located above the heat dissipation fin (8).

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