Grounding equipment for railway contact network

Abstract

The invention discloses grounding equipment for a railway contact network, and relates to the technical field of contact network grounding, the grounding equipment for the railway contact network comprises a box body and a grounding switch assembly accommodated in the box body, the grounding switch assembly comprises a base, a static knife connected with an incoming cable and a moving knife connected with a grounding cable, the two ends of the movable cutter are a hinged end and a free end respectively, the hinged end of the movable cutter is hinged to the base through a hinged shaft, and the static cutter is installed on the base. The transmission mechanism is hinged to the position, between the hinged end and the free end, of the movable cutter; and the driving mechanism is used for driving the transmission mechanism to drive the movable cutter to rotate around the hinge shaft, so that the free end of the movable cutter swings to be connected with or separated from the static cutter. According to the technical scheme provided by the invention, the grounding wire can be automatically connected and dismounted, on one hand, one-man operation can be realized, time and labor are saved, maintenance time is not occupied, and the danger of human errors is also avoided; on the other hand, the operator does not need to operate outdoors, and the safety of the operator is improved.

Description

Technical Field

[0001] The invention relates to the technical field of contact micro-grounding, and in particular to a grounding device for a railway contact network. Background Art

[0002] The contact network of electrified railways usually carries a high voltage of 27.5kV. When the contact network inspection and maintenance personnel are performing related operations and the locomotive depot maintenance personnel are performing roof inspection and maintenance on electric locomotives, in order to ensure the personal safety of workers in the blocking operation area, the contact network must be powered off and grounding wires must be reliably installed to prevent electromagnetic induction and electrostatic induction, thereby avoiding injury or damage to the relevant workers.

[0003] The existing method of connecting and hanging ground wires is basically to manually connect and remove the ground wires. Since the ground wire lead rod is too long and has a certain weight, when manually connecting or removing the ground wire, on the one hand, it requires the cooperation of multiple people, which is time-consuming and labor-intensive, has high labor costs, and takes a long time for maintenance. There is also the risk of human error; on the other hand, it requires operators to operate outdoors, especially in winter when the operating conditions are extremely poor, which increases the danger for operators. Summary of the invention

[0004] The main purpose of the present invention is to provide a grounding device for railway contact network, which solves the problem that when manually connecting or removing the ground wire, on the one hand, there is the need for cooperative operation of multiple people, which is time-consuming and labor-intensive, has high labor costs, takes a long time for maintenance, and there is also the risk of human error; on the other hand, it requires operators to operate outdoors, especially in winter when the operating conditions are extremely poor, which increases the danger of operators.

[0005] To achieve the above-mentioned purpose, the present invention provides a grounding device for a railway overhead contact network, comprising a box and:

[0006] A grounding switch assembly, the grounding switch assembly comprising a base, a stationary knife connected to an incoming cable, and a movable knife connected to a grounding cable, the two ends of the movable knife being a hinged end and a free end respectively, the hinged end of the movable knife being hinged to the base through a hinge shaft, and the stationary knife being mounted on the base;

[0007] A transmission mechanism, the transmission mechanism is hinged to the movable knife at a position between the hinge end and the free end;

[0008] The driving mechanism is used to drive the transmission mechanism to drive the movable knife to rotate around the hinge shaft, so that the free end of the movable knife swings to connect with or disengage from the stationary knife.

[0009] In one embodiment, the stationary knife is located below the movable knife, the hinge shaft extends in the longitudinal direction, and the movable knife can rotate around the hinge shaft on a surface formed in the transverse direction and the vertical direction.

[0010] In one embodiment, the base is provided with a hinge position for hingedly connecting to the hinged end of the movable knife, and the base is provided with a connecting position for connecting to the stationary knife. The connecting position is located directly below the hinge position, and the free end of the movable knife is connected to the stationary knife when it swings to the lowest point.

[0011] In one embodiment, the transmission mechanism includes a first connecting rod and a second connecting rod, the first end of the first connecting rod and the first end of the second connecting rod are hinged to each other, the second end of the first connecting rod is connected to the output end of the driving mechanism, and the second end of the second connecting rod is hinged to the movable knife at a position between the hinge end and the free end, and the driving mechanism is used to drive the movable knife to rotate around the hinge axis by driving the first connecting rod and the second connecting rod.

[0012] In one embodiment, the driving mechanism includes an operating shaft, which extends longitudinally and is rotatably mounted on the base. The operating shaft is connected to the second end of the first connecting rod. By driving the operating shaft to rotate, the first connecting rod and the second connecting rod drive the movable knife to rotate around the hinge axis.

[0013] In one embodiment, the grounding device for railway contact network further comprises a compression spring, one end of the compression spring is connected to the base, and the other end of the compression spring is connected to a position on the movable knife close to the hinge end.

[0014] In one embodiment, the driving mechanism also includes a linear driving member and a telescopic rod, the driving member and the base are arranged in a horizontal interval, the output end of the linear driving member is hinged to the first end of the telescopic rod, the second end of the telescopic rod is connected to the operating shaft, and the linear driving member drives the first end of the telescopic rod to move vertically to drive the operating shaft to rotate, so that the first connecting rod and the second connecting rod drive the movable knife to rotate around the hinge axis.

[0015] In one embodiment, the driving mechanism also includes a rotating driving member, which is installed on the base. The output end of the rotating driving member is connected to the operating shaft. The rotating driving member drives the operating shaft to rotate, so that the first connecting rod and the second connecting rod drive the movable knife to rotate around the hinge axis.

[0016] In one embodiment, the static knife is also connected to a voltage detection unit, and the voltage detection unit is accommodated in the box. The voltage detection unit includes a high-voltage fuse and a voltage transformer. The high-voltage side of the voltage transformer is connected to the static knife through a line. The high-voltage fuse is provided on the line between the high-voltage side of the voltage transformer and the static knife. The low-voltage side of the voltage transformer is connected to a grounding switch state detection module, an electrical test module and an automatic discharge module. A control unit is installed in the box, and the control unit is electrically connected to the driving mechanism, the grounding switch state detection module, the electrical test module and the automatic discharge module, respectively.

[0017] In one embodiment, a camera is installed in the box, and / or an observation window is provided on one side of the box.

[0018] In the technical solution provided by the present invention, a grounding switch assembly, a transmission mechanism and a driving mechanism are installed in a box. The grounding switch assembly includes a base, on which a static knife connected to one end of an incoming cable is arranged, and the other end of the incoming cable passes through and extends out of the box to connect to the railway contact network, and a moving knife is connected to one end of a grounding cable, and the other end of the grounding cable passes through and extends out of the box to be grounded, so that a grounding operation can be realized. Moreover, the two ends of the moving knife are respectively a hinged end and a free end, and the hinged end of the moving knife is hinged to the base through a hinge shaft, and the static knife is installed on the base. The transmission mechanism is hinged to the position between the hinged end and the free end on the moving knife, which can meet the requirements of transmitting force to the moving knife and driving the moving knife to rotate around the hinge shaft. The driving mechanism can drive the transmission mechanism to drive the moving knife to rotate around the hinge shaft, so that the free end of the moving knife swings to automatically connect or automatically disconnect with the static knife.

[0019] The grounding device for railway contact network of the present invention arranges a driving mechanism and a transmission mechanism in a box body so that the movable knife can be automatically connected or disconnected with the static knife, thereby realizing automatic connection or removal of the ground wire, replacing the manual connection or removal process of the ground wire, and does not require multiple people to operate, thus saving time and effort, with low labor costs, and does not take up maintenance time, and also avoids the risk of human error; on the other hand, the operator starts the operation by starting the driving mechanism, does not need outdoor operation, will not be affected by the bad weather in winter, and improves the safety of the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0021] Figure 1A schematic structural diagram of an embodiment of a grounding device for a railway overhead contact network provided by the present invention;

[0022] Figure 2 A schematic diagram of the installation position of the observation window of the grounding device for the railway overhead contact network provided by the present invention;

[0023] Figure 3 A schematic diagram of the three-dimensional structure of the separation of the moving knife and the static knife of the grounding equipment for the railway contact network;

[0024] Figure 4 for Figure 3 A front view of

[0025] Figure 5 This is a schematic diagram of the connection between the moving knife and the static knife of the grounding equipment for the railway contact network.

[0026] Description of Figure Numbers:

[0027] 100. Grounding equipment for railway contact network; 1. Box; 2. Grounding switch assembly; 21. Stationary knife; 22. Moving knife; 221. Articulated end; 222. Free end; 223. Articulated shaft; 23. Base; 3. Transmission mechanism; 31. First connecting rod; 32. Second connecting rod; 4. Driving mechanism; 41. Operating shaft; 42. Compression spring; 43. Lifting motor; 44. Telescopic rod; 5. Voltage transformer; 6. High-voltage fuse; 7. Observation window; 8. Grounding cable; 9. Incoming cable; 10. Camera; 11. Door.

[0028] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0031] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0032] The contact network of electrified railways usually carries a high voltage of 27.5kV. When the contact network inspection and maintenance personnel are performing related operations and the locomotive depot maintenance personnel are performing roof inspection and maintenance on electric locomotives, in order to ensure the personal safety of workers in the blocking operation area, the contact network must be powered off and grounding wires must be reliably installed to prevent electromagnetic induction and electrostatic induction, thereby avoiding injury or damage to the relevant workers.

[0033] The existing method of connecting and hanging ground wires is basically to manually connect and remove the ground wires. Since the ground wire lead rod is too long and has a certain weight, when manually connecting or removing the ground wire, on the one hand, it requires the cooperation of multiple people, which is time-consuming and labor-intensive, has high labor costs, and takes a long time for maintenance. There is also the risk of human error; on the other hand, it requires operators to operate outdoors, especially in winter when the operating conditions are extremely poor, which increases the danger for operators.

[0034] In order to solve this technical problem, the present invention provides a grounding device for railway contact network to solve the problem that when the ground wire is manually connected or removed, on the one hand, it requires the cooperation of multiple people, which is time-consuming and labor-intensive, has low labor costs, takes a long time for maintenance, and there is a risk of human error; on the other hand, it requires operators to operate outdoors, especially in winter when the operating conditions are extremely poor, which increases the danger of operators.

[0035] See also Figures 1 to 5 The grounding device 100 for railway contact network includes a box body 1 and a grounding switch assembly 2, a transmission mechanism 3 and a driving mechanism 4 accommodated in the box body 1. The grounding switch assembly 2 includes a base 23, a static knife 21 connected to the incoming cable 9 and a movable knife 22 connected to the grounding cable 8. The two ends of the movable knife 22 are respectively a hinged end 221 and a free end 222. The hinged end 221 of the movable knife 22 is hinged to the base 23 through a hinge shaft 223, and the static knife 21 is installed on the base 23; the transmission mechanism 3 is hinged to the movable knife 22 at a position between the hinged end 221 and the free end 222; the driving mechanism 4 is used to drive the transmission mechanism 3 to drive the movable knife 22 to rotate around the hinge shaft 223, so that the free end 222 of the movable knife 22 swings to connect with or disconnect from the static knife 21.

[0036] In one embodiment of the present invention, the longitudinal direction is Figure 3 The front-to-back direction is shown, and the horizontal direction is Figure 3 The left and right directions are shown, and the vertical direction is Figure 3 Up and down directions shown.

[0037] In the railway overhead contact network grounding device 100 of the present invention, and referring to Figures 1 to 5 A grounding switch assembly 2, a transmission mechanism 3 and a driving mechanism 4 are installed in the box body 1. The grounding switch assembly 2 includes a base 23, which is installed on the left side wall of the box body 1. A static knife 21 connected to one end of an incoming cable 9 is arranged on the base 23. The other end of the incoming cable 9 passes through and extends out of the box body 1 to connect to the railway contact network. The movable knife 22 is connected to one end of a grounding cable 8. The other end of the grounding cable 8 passes through and extends out of the box body 1 to be grounded, thereby realizing a grounding operation. Moreover, the two ends of the movable knife 22 are respectively a hinged end 221 and a free end 222. The hinged end 221 of the movable knife 22 is hinged to the base 23 through a hinge shaft 223. The stationary knife 21 is installed on the base 23. The transmission mechanism 3 is hinged to the movable knife 22 at a position between the hinged end 221 and the free end 222, and can meet the requirements of transmitting force to the movable knife 22 and driving the movable knife 22 to rotate around the hinge shaft 223. The driving mechanism 4 can drive the transmission mechanism 3 to drive the movable knife 22 to rotate downward or upward around the hinge shaft 223, so as to correspondingly make the free end 222 of the movable knife 22 swing downward to automatically connect with the stationary knife 21 or make the free end 222 of the movable knife 22 swing upward to automatically disengage from the stationary knife 21.

[0038] The grounding device for railway contact network of the present invention arranges a driving mechanism 4 and a transmission mechanism 3 in a box body 1, so that the movable knife 22 can be automatically connected to or disconnected from the stationary knife 21, thereby realizing automatic connection or removal of the ground wire, replacing the manual connection or removal of the ground wire process, and does not require multiple people to operate, saving time and effort, low labor cost, and no maintenance time is taken up, and the risk of human error is avoided; on the other hand, the operator starts the operation of the driving mechanism, does not need outdoor operation, will not be affected by the bad weather in winter, and improves the safety of the operator.

[0039] In one embodiment of the present invention, please refer to Figure 1 An opening is provided at the top of the box body 1, and a cover plate is provided at the opening to cover the opening to protect the parts inside the box body 1.

[0040] In one embodiment of the present invention, the box body 1 is in the shape of a rectangular parallelepiped, and movable wheels are provided at the four corners of the bottom of the box body 1 to facilitate moving to a suitable working position, saving time and effort.

[0041] In one embodiment of the present invention, the box body 1 may be made of stainless steel, which has low cost, high mechanical strength and long service life.

[0042] In one embodiment of the present invention, the base 23 is connected to the inner wall of the box body 1 by bolts. The base 23 is U-shaped, and the opening of the U-shape is set to the right. The movable knife 22 is hinged at the first end of the U-shaped base 23 by a hinge, and the second end of the U-shaped base 23 is connected to the stationary knife 21 by bolts. The layout is reasonable, which is convenient for cooperating with the transmission mechanism 3 and the drive mechanism 4 to realize grounding operation.

[0043] In one embodiment of the present invention, the stationary knife 21 is located below the movable knife 22 , the hinge shaft 223 extends in the longitudinal direction, and the movable knife 22 can rotate around the hinge shaft 223 on a surface formed in the transverse and vertical directions.

[0044] like Figure 1 and Figure 3 As shown, the stationary knife 21 is located below the movable knife 22, and the hinge shaft 223 extends in the front-to-back direction. The movable knife 22 can rotate downward or upward around the hinge shaft 223 on the surface formed in the left-right direction and the up-down direction. The layout is reasonable and can realize grounding operation.

[0045] In one embodiment of the present invention, a hinge position is provided on the base 23 for hinged connection with the hinged end 221 of the movable knife 22, and a connecting position is provided on the base 23 for connecting with the stationary knife 21. The connecting position is located directly below the hinge position, and the free end 222 of the movable knife 22 is connected with the stationary knife 21 when it swings to the lowest point.

[0046] like Figure 3 As shown, a hinge position is provided on the first end of the base 23, which is convenient for hinged connection with the hinge end 221 of the movable knife 22 through a hinge, and a connecting position is provided on the second end of the base 23, which is convenient for connection with the stationary knife 21 through a bolt. The connecting position is located directly below the hinge position, so that the free end 222 of the movable knife 22 can be connected with the stationary knife 21 when it swings downward to the lowest point. The hinge position and the connecting position are symmetrically arranged up and down, and the layout is reasonable, and can ensure that the free end 222 of the movable knife 22 is well connected with the stationary knife 21 when it swings to the lowest point.

[0047] In one embodiment of the present invention, the transmission mechanism 3 includes a first connecting rod 31 and a second connecting rod 32, the first end of the first connecting rod 31 and the first end of the second connecting rod 32 are hinged to each other, the second end of the first connecting rod 31 is connected to the output end of the driving mechanism 4, and the second end of the second connecting rod 32 is hinged to the movable knife 22 at a position between the hinge end 221 and the free end 222. The driving mechanism 4 is used to drive the movable knife 22 to rotate downward or upward around the hinge shaft 223 by driving the first connecting rod 31 and the second connecting rod 32.

[0048] like Figure 1 and Figure 3As shown, the transmission mechanism 3 includes a first connecting rod 31 and a second connecting rod 32, the first end of the first connecting rod 31 and the first end of the second connecting rod 32 are hinged to each other through a hinge, the second end of the first connecting rod 31 is connected to the output end of the driving mechanism 4, and the second end of the second connecting rod 32 is hinged to the movable knife 22 through a hinge at a position between the hinge end 221 and the free end 222. The driving mechanism 4 can drive the movable knife 22 to rotate around the hinge shaft 223 by driving the first connecting rod 31 and the second connecting rod 32, thereby realizing the connection or disconnection of the free end 222 of the movable knife 22 with the stationary knife 21. Only the first connecting rod 31 and the second connecting rod 32 need to be set, the structure is simple, and the manufacturing cost is low.

[0049] In one embodiment, the driving mechanism 4 includes an operating shaft 41, which extends longitudinally and is rotatably mounted on the base 23. The operating shaft 41 is connected to the second end of the first connecting rod 31. By driving the operating shaft 41 to rotate, the first connecting rod 31 and the second connecting rod 32 drive the movable knife 22 to rotate downward or upward around the hinge shaft 223.

[0050] like Figure 3 As shown, the driving mechanism 4 includes an operating shaft 41, which extends in the front-to-back direction and is mounted on the base 23 by rotation, so that the operating shaft 41 can be rotated manually and electrically, and the operation is convenient. The operating shaft 41 is connected to the second end of the first connecting rod 31. By driving the operating shaft 41 to rotate, the first connecting rod 31 and the second connecting rod 32 can drive the movable knife 22 to rotate downward or upward around the hinge shaft 223, so that the free end 222 of the movable knife 22 is connected or disconnected from the stationary knife 21.

[0051] In one embodiment of the present invention, the railway contact network grounding device 100 further includes a compression spring 42 , one end of the compression spring 42 is connected to the base 23 , and the other end of the compression spring 42 is connected to the movable knife 22 at a position close to the hinge end 221 .

[0052] like Figure 2 As shown, the grounding device 100 for railway contact network also includes a compression spring 42, one end of the compression spring 42 is connected to the base 23, and the position of the connection of one end of the compression spring 42 on the base 23 is not limited. As long as it does not affect the rotation of the first connecting rod 31 and the second connecting rod 32, the compression spring 42 can support the moving knife 22 in a disengaged state from the stationary knife 21, and can effectively prevent the moving knife 22 from being accidentally connected to the stationary knife 21. The other end of the compression spring 42 is connected to the moving knife 22 at a position close to the hinge end 221. When the compression spring 42 is deformed less, it can support the moving knife 22 and the stationary knife 21 to prevent accidental connection, and the reliability is high.

[0053] In one embodiment of the present invention, the driving mechanism 4 also includes a driving member and a telescopic rod 44. The driving member and the base 23 are arranged in a horizontal interval. The output end of the driving member is hinged to the first end of the telescopic rod 44, and the second end of the telescopic rod 44 is connected to the operating shaft 41. The driving member drives the first end of the telescopic rod 44 to move vertically to drive the operating shaft 41 to rotate, so that the first connecting rod 31 and the second connecting rod 32 drive the movable knife 22 to rotate around the hinge shaft 223.

[0054] like Figure 1 As shown, the driving mechanism 4 also includes a driving member and a telescopic rod 44. The driving member and the base 23 are spaced apart in the left and right directions and are reasonably arranged to avoid interference. Since the left end of the telescopic rod 44 is connected to the rotatable operating shaft 41, and the right end of the telescopic rod 44 is hinged to the output end of the driving member, the operating shaft 44 rotates around the left end of the telescopic rod 44, so that the first connecting rod 31 and the second connecting rod 32 drive the movable knife 22 to rotate upward or downward around the hinge shaft 223, thereby realizing the connection or disconnection of the free end 222 of the movable knife 22 with the static knife 21.

[0055] In one embodiment of the present invention, the telescopic rod 44 is a multi-group telescopic structure composed of a plurality of hollow rods of gradually decreasing sizes nested together. The output end of the driving member is hinged to the right end of the telescopic rod 44 through an output shaft, so that when the output shaft moves up and down, the telescopic rod 44 will change its own length accordingly and will not interfere with the output end of the driving member.

[0056] In one embodiment of the present invention, the driving member may be a lifting motor or an oil cylinder, or may be a hydraulic cylinder.

[0057] In other embodiments, the driving mechanism 4 also includes a driving member, which is installed on the base 23. The output end of the driving member is connected to the operating shaft 41. The driving member drives the operating shaft 41 to rotate, so that the first connecting rod 31 and the second connecting rod 32 drive the movable knife 22 to rotate around the hinge shaft 223.

[0058] The driving mechanism 4 also includes a driving member, which is fixedly mounted on the base 23. The output end of the driving member is connected to the operating shaft 41. The driving member drives the operating shaft 41 to rotate, so that the first connecting rod 31 and the second connecting rod 32 drive the movable knife 22 to rotate upward or downward around the hinge shaft 223, thereby realizing the connection or disconnection of the free end 222 of the movable knife 22 with the stationary knife 21.

[0059] In one embodiment of the present invention, the driving member may be a servo motor, a stepper motor or an asynchronous motor, or a rotary hydraulic cylinder. The driving member directly drives the operating shaft 41 without the need for an adapter, thereby simplifying the structure and facilitating manufacture.

[0060] In one embodiment of the present invention, one end of the operating shaft 41 is a hand-held end, and anti-slip grooves can be provided on the hand-held end to increase the friction with the human hand. When the driving component of this embodiment, for example, the driving component is a lifting motor, an oil cylinder, a hydraulic cylinder, a servo motor, a stepping motor, an asynchronous motor or a rotating hydraulic cylinder, is damaged, a tool can be used to disassemble the connection between the driving component and the operating shaft 41, and the ground wire can be connected or removed directly by manually rotating the operating shaft 41.

[0061] In one embodiment of the present invention, the static knife 21 is also connected to a voltage detection unit, which is accommodated in the box 1. The voltage detection unit includes a high-voltage fuse 6 and a voltage transformer 5. The high-voltage side of the voltage transformer 5 is connected to the static knife 21 through a line. A high-voltage fuse 6 is provided on the line between the high-voltage side of the voltage transformer 5 and the static knife 21. The low-voltage side of the voltage transformer 5 is connected to a grounding switch state detection module, an electrical testing module and an automatic discharge module. A control unit is installed in the box 1, and the control unit is electrically connected to the driving mechanism 4, the grounding switch state detection module, the electrical testing module and the automatic discharge module respectively.

[0062] The static knife 21 is also connected to a voltage detection unit through a line. The voltage detection unit is installed at the bottom of the box 1. The voltage detection unit includes a high-voltage fuse 6 and a voltage transformer 5. The high-voltage side of the voltage transformer 5 is connected to the static knife 21 through a line. A high-voltage fuse 6 is provided on the line between the high-voltage side of the voltage transformer 5 and the static knife 21 to protect the voltage transformer 5 from damage by overload and short-circuit current. The low-voltage side of the voltage transformer 5 is connected to a grounding switch state detection module, an electrical test module and an automatic discharge module. A control unit is installed in the box 1. The control unit is electrically connected to the driving mechanism 4, the grounding switch state detection module, the electrical test module and the automatic discharge module, respectively, to realize the functions of automatic electrical test and discharge, automatic connection or removal of the ground wire and intelligent detection of the grounding state.

[0063] It should be noted that the grounding switch status detection module, the electrical test module, the automatic discharge module and the control unit are all existing technologies. The control unit can select PLC, and the control circuit between it and the grounding switch status detection module, the electrical test module and the automatic discharge module is existing technology.

[0064] In one embodiment of the present invention, the voltage detection unit can be a post insulator sensor, a wireless voltage transformer or a voltage transformer 5, which can be selected according to actual conditions. The difference is that the post insulator sensor and the voltage transformer 5 need to be directly connected to the contact network to detect the voltage value of the contact network, while the wireless voltage transformer does not need to be directly connected to the contact network, but is installed at the corresponding sensing position to detect the voltage value of the contact network. The post insulator sensor, the wireless voltage transformer or the voltage transformer 5 are all existing technologies and can be purchased commercially.

[0065] In one embodiment, a camera 10 is installed in the box 1. Specifically, Figure 1 As shown, a camera 10 is installed at the lower part of the side wall of the box body 1. The camera 10 is a 360° rotating camera that can monitor the operation status of various components in the box body 1.

[0066] In one embodiment, a viewing window 7 is provided on one side of the box body 1. Figure 1 As shown, an observation window 7 is provided on the right side of the box body 1 to facilitate manual observation of the operation of various components in the box body 1.

[0067] In one embodiment, if Figure 1 and Figure 2 As shown, a door 11 is provided on one side of the box body 1. Specifically, the door 11 is hinged on the right side of the box body 1 to facilitate the staff to install and repair the equipment.

[0068] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A grounding device for railway contact network, characterized in that: The railway contact network grounding device comprises a box body and: A grounding switch assembly, the grounding switch assembly comprising a base, a stationary knife connected to an incoming cable, and a movable knife connected to a grounding cable, the two ends of the movable knife being a hinged end and a free end respectively, the hinged end of the movable knife being hinged to the base through a hinge shaft, and the stationary knife being mounted on the base; A transmission mechanism, the transmission mechanism is hinged to the movable knife at a position between the hinge end and the free end; The driving mechanism is used to drive the transmission mechanism to drive the movable knife to rotate around the hinge shaft, so that the free end of the movable knife swings to connect with or disengage from the stationary knife.

2. The grounding device for railway overhead contact network according to claim 1, characterized in that: The stationary knife is located below the moving knife, the hinge shaft extends in the longitudinal direction, and the moving knife can rotate around the hinge shaft on a surface formed in the transverse direction and the vertical direction.

3. The grounding device for railway overhead contact network according to claim 2, characterized in that: The base is provided with a hinged position for hingedly connecting with the hinged end of the movable knife, and the base is provided with a connecting position for connecting with the stationary knife. The connecting position is located directly below the hinged position, and the free end of the movable knife is connected with the stationary knife when it swings to the lowest point.

4. The grounding device for railway overhead contact network according to claim 1, characterized in that: The transmission mechanism includes a first connecting rod and a second connecting rod, the first end of the first connecting rod and the first end of the second connecting rod are hinged to each other, the second end of the first connecting rod is connected to the output end of the driving mechanism, and the second end of the second connecting rod is hinged to the movable knife at a position between the hinge end and the free end. The driving mechanism is used to drive the movable knife to rotate around the hinge axis by driving the first connecting rod and the second connecting rod.

5. The grounding device for railway overhead contact network according to claim 4, characterized in that: The driving mechanism includes an operating shaft, which extends longitudinally and is rotatably mounted on the base. The operating shaft is connected to the second end of the first connecting rod. By driving the operating shaft to rotate, the first connecting rod and the second connecting rod drive the movable knife to rotate around the hinge axis.

6. The grounding device for railway overhead contact network according to claim 5, characterized in that: The grounding device for railway contact network also includes a compression spring, one end of which is connected to the base, and the other end of which is connected to a position on the movable knife close to the hinged end.

7. The grounding device for railway overhead contact network according to claim 5, characterized in that: The driving mechanism also includes a driving member and a telescopic rod. The driving member and the base are arranged in a horizontal interval. The output end of the driving member is hinged to the first end of the telescopic rod. The second end of the telescopic rod is connected to the operating shaft. The driving member drives the first end of the telescopic rod to move vertically to drive the operating shaft to rotate, so that the first connecting rod and the second connecting rod drive the movable knife to rotate around the hinge axis.

8. The grounding device for railway overhead contact network according to claim 5, characterized in that: The driving mechanism also includes a driving member, which is installed on the base. The output end of the driving member is connected to the operating shaft. The driving member drives the operating shaft to rotate, so that the first connecting rod and the second connecting rod drive the movable knife to rotate around the hinge shaft.

9. The railway overhead contact network grounding device according to any one of claims 1 to 8, characterized in that: The static knife is also connected to a voltage detection unit, which is accommodated in the box. The voltage detection unit includes a high-voltage fuse and a voltage transformer. The high-voltage side of the voltage transformer is connected to the static knife through a line. The high-voltage fuse is provided on the line between the high-voltage side of the voltage transformer and the static knife. The low-voltage side of the voltage transformer is connected to a grounding switch state detection module, an electrical test module and an automatic discharge module. A control unit is installed in the box, and the control unit is electrically connected to the driving mechanism, the grounding switch state detection module, the electrical test module and the automatic discharge module respectively.

10. The railway overhead contact network grounding device according to any one of claims 1 to 8, characterized in that: A camera is installed in the box, and / or an observation window is provided on one side of the box.

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