Modularized grounding switch device for maintenance of urban rail transit overhead line system

Abstract

The utility model discloses a modularized grounding switch device for maintenance of an urban rail transit overhead line system, which comprises a switch base, a grounding knife switch, a wire holder, an insulating column, an electric / manual driving module and a transmission module, the electric / manual driving module comprises a driving motor, a gear shell, an electric driving gear, a manual driving gear, a manual transmission shaft and a manual driving cylinder, the transmission module comprises a first-stage reduction gear, a second-stage reduction worm, a second-stage reduction worm gear, a transmission shaft and an insulating transmission rod, and the electric / manual driving module and the transmission module are connected with each other. The transmission module is connected with the grounding knife-switch through the insulation transmission rod. According to the utility model, the manual control function and the electric control function are simultaneously realized, the current overhaul construction progress of the urban rail transit is not influenced, the whole machine does not need to be disassembled for maintenance or the whole machine does not need to be replaced when a fault occurs, and only a certain module related to the fault needs to be quickly maintained or replaced, so that the maintenance convenience and the maintenance efficiency are improved, and the maintenance cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a grounding switch device, especially a modular grounding switch device for catenary maintenance of urban rail transit. BACKGROUND

[0002] Urban rail transit includes ground railway, underground railway (i.e. subway), elevated railway, etc., all of which use electric energy as driving energy, and catenary (generally above the train) or contact rail (generally beside the train) is the carrier for transmitting electric energy, used for sliding contact with the power input contact on the train.

[0003] The safe operation of urban rail transit cannot be achieved without high-quality maintenance. During the maintenance of catenary or contact rail, a grounding wire needs to be installed in the operation section to ensure the safety of the maintenance personnel. The traditional operation mode of installing a grounding wire is that the maintenance personnel carry a grounding wire and an electricity tester to the site, first test the electricity, then hang the grounding wire, and then remove the grounding wire after the maintenance is completed.

[0004] In order to effectively reduce the labor intensity of the operating personnel, shorten the operation time, and improve the work efficiency, the grounding switch device fixedly installed in the electrical cabinet beside the track is more and more widely used. One terminal block of the grounding switch device is connected with the catenary or contact rail, and the other terminal block is connected with the steel rail (i.e. the running track, which is connected with the ground itself, i.e. in the grounded state). A knife switch is arranged between the two terminal blocks. During normal operation, the knife switch is opened, the catenary or contact rail is not grounded, and the electric energy is normally transmitted. When maintenance is needed, the power supply of the catenary or contact rail is first disconnected, and then the knife switch is closed to ground the catenary or contact rail, so as to avoid safety accidents of the maintenance personnel caused by high-voltage charges on the catenary or contact rail due to various reasons or incomplete disconnection of the power supply due to accidents.

[0005] The traditional grounding switch device adopts a conventional electric or manual control structure, which has the following defects: either the structure is too simple, the insulation performance is not ideal, there are safety hazards during operation, and only manual or electric control functions are available, so that the device needs to be repaired or replaced before use after a fault occurs, which affects the maintenance construction progress of urban rail transit; or the structure is complex and bulky, and all parts are connected as a whole, so that the whole machine needs to be disassembled and repaired or replaced as a whole when a fault occurs, and a certain module involved in the fault cannot be quickly repaired or replaced, so that the maintenance convenience, maintenance efficiency, and maintenance cost are low. UTILITY MODEL CONTENTS

[0006] The utility model aims to solve the above problems by providing a modular grounding switch device for catenary maintenance of urban rail transit, which integrates electric control and manual control and adopts modular connection, compact structure, and reliable insulation.

[0007] The utility model discloses the following technical scheme to realize the above-mentioned purpose:

[0008] A modular grounding switch device for urban rail transit catenary maintenance, comprising a switch base, a grounding knife switch and a terminal block, further comprising an insulating column, an electric / hand drive module and a transmission module, one end of two insulating columns is connected with the switch base respectively, the other end of two parallel insulating columns is connected with two terminal blocks respectively, the first end of the grounding knife switch in both ends is rotatably connected with one terminal block, and the second end can be in close contact with the other terminal block, the electric / hand drive module comprises a drive motor, a gear housing, an electric drive gear, a hand drive gear, a hand transmission shaft and a hand drive cylinder, the drive motor is installed on the switch base, the electric drive gear is installed on the rotating shaft of the drive motor, the gear housing is installed on one end of the drive motor, the electric drive gear and the hand drive gear are both placed in the gear housing, the hand transmission shaft is installed on the gear housing through a bearing and connected with the hand drive gear at the inner end and placed outside the gear housing at the outer end, the hand drive cylinder is connected with the outer end of the hand transmission shaft, the transmission module comprises a primary reduction gear, a secondary reduction worm, a secondary reduction worm gear, a transmission shaft and an insulating transmission rod, the primary reduction gear is placed in the gear housing and connected with the electric drive gear and the hand drive gear respectively, the secondary reduction worm is installed on the switch base through a bearing and connected with the primary reduction gear at one end, the middle section of the secondary reduction worm is connected with the secondary reduction worm gear, the secondary reduction worm gear is connected with one end of the transmission shaft, the other end of the transmission shaft is provided with a rotating connection part, one end of the insulating transmission rod is rotatably connected with the rotating connection part, and the other end of the insulating transmission rod is rotatably connected with the position close to the first end of the grounding knife switch.

[0009] As a preferred, in order to facilitate the switch state information to be transmitted to the device for the user to understand in the form of electrical signal, the modular grounding switch device for urban rail transit catenary maintenance further comprises a switch state display module, the switch state display module comprises a switch state display board, a transmission connecting rod and a switch state signal output seat, one end of two transmission connecting rods is rotatably connected, one end of the switch state display board is connected with one end of the transmission shaft close to the rotating connection part, the other end of the switch state display board is rotatably connected with the other end of one transmission connecting rod, the switch state display board is provided with a switch state mark, the switch state signal output seat is provided with a freely rotatable output shaft, the output shaft can be connected with different switch state corresponding terminal blocks provided on the switch state signal output seat in the rotating process respectively, and the other end of the other transmission connecting rod is connected with the output shaft.

[0010] As preferred, in order to further improve the integration, the modular grounding switch device for the contact network maintenance of urban rail transit further comprises a reduction mechanism shell and a transmission shell, the secondary reduction worm and the secondary reduction worm wheel are installed in the reduction mechanism shell, the reduction mechanism shell is installed on the switch base, the secondary reduction worm is installed on the reduction mechanism shell through a bearing, the transmission shaft passes through a corresponding through hole on the reduction mechanism shell, the reduction mechanism shell, the transmission shaft and the switch state display module are all placed in the transmission shell, the transmission shell is installed on the switch base and close to the gear shell, one end of the secondary reduction worm passes through a corresponding through hole on the reduction mechanism shell and a corresponding through hole on the transmission shell, and the insulating transmission rod passes through a corresponding through hole on the transmission shell.

[0011] As preferred, in order to facilitate application, the modular grounding switch device for the contact network maintenance of urban rail transit further comprises an overall shell, the opening end of the overall shell is connected with the switch base, the electric / motor-driven module, other components in the transmission module except the insulating transmission rod and the switch state display module are all placed in the overall shell, a manual operation through hole is arranged on the overall shell at a position corresponding to the manual driving cylinder, and a switch state display through hole is arranged on the overall shell at a position corresponding to the switch state display plate.

[0012] As preferred, in order to facilitate the rotation of the manual driving cylinder through a tool, a radial through hole for inserting a driving rod to drive the rotation of the manual driving cylinder is arranged on the cylinder wall of the manual driving cylinder.

[0013] As preferred, in order to ensure the insulation performance, the insulating column is an epoxy resin column.

[0014] The utility model discloses the beneficial effect lies in:

[0015] The utility model discloses a switch base, the insulating column, the grounding knife gap, the wiring seat, the electric / motor-driven module and the transmission module are integrated on the switch base, make two grounding knife gaps have enough insulation distance between, avoid the security risk in the operation process, have manual control and electric control function simultaneously, when part spare breaks down, can adopt other components to realize the temporary switch control, do not influence the maintenance construction progress of urban rail transit this time, and with the mode that a plurality of modules are connected to each other, the mechanism of different functions is designed as different modules, when breaking down, do not need to overhaul maintenance or overall replacement, only need to carry out the quick maintenance or replacement of the module of involving the fault, improve the maintenance convenience and maintenance efficiency, reduce the maintenance cost, simultaneously, the utility model discloses by adopting two -stage reduction, the rotation of driving motor is reduced significantly, increase its torque, make the grounding knife gap more stable and reliable when opening and closing. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is the main view structural schematic diagram of the modular grounding switch device for the urban rail transit contact network maintenance after being assembled, and the grounding knife switch is in the closed state in the diagram;

[0017] Figure 2 is the local view main view structural schematic diagram of the modular grounding switch device for the urban rail transit contact network maintenance after being assembled, and the grounding knife switch is in the closed state in the diagram;

[0018] Figure 3 is the three-dimensional structural schematic diagram of the modular grounding switch device for the urban rail transit contact network maintenance after being partially assembled and removing the overall shell, and the grounding knife switch is in the closed state in the diagram;

[0019] Figure 4 is the three-dimensional structural schematic diagram of the modular grounding switch device for the urban rail transit contact network maintenance before being assembled and removing the overall shell, and the grounding knife switch is in the closed state in the diagram. DETAILED DESCRIPTION

[0020] The utility model will be further described in connection with the drawings:

[0021] As Figures 1-4As shown, the modular grounding switch device for maintenance of urban rail transit contact networks according to this utility model includes a switch base 1, a grounding knife switch 5, a terminal block 2, an insulating column 4, an electric / manual drive module, and a transmission module. One end of two parallel insulating columns 4 is connected to the switch base 1, and the other end of the two insulating columns 4 is connected to two terminal blocks 2. The first end of the grounding knife switch 5 is rotatably connected to one terminal block 2, and the second end can be in close contact with the other terminal block 2. The electric / manual drive module includes a drive motor 17, a gear housing 16, an electric drive gear (located inside the gear housing 16, not visible in the figure but easy to understand), a manual drive gear (located inside the gear housing 16, not visible in the figure but easy to understand), a manual transmission shaft 9, and a manual drive cylinder 8. The drive motor 17 is mounted on the switch base 1, and the electric drive gear is mounted on the rotating shaft of the drive motor 17 (located inside the gear housing 16, not visible in the figure but easy to understand). The gear housing 16 is mounted on one end of the drive motor 17. Both the electric drive gear and the manual drive gear are located on the gear housing 16. Inside the gear housing 16, the manual drive shaft 9 is mounted on the gear housing 16 via a bearing (not visible in the figure but easy to understand), with its inner end connected to the manual drive gear and its outer end outside the gear housing 16. The manual drive cylinder 8 is connected to the outer end of the manual drive shaft 9. The radial cross-section of the manual drive shaft 9 is square, and it cannot rotate relative to the manual drive cylinder 8. The transmission module includes a first-stage reduction gear 15, a second-stage reduction worm gear 13, a second-stage reduction worm wheel 14, a drive shaft 18, and an insulated transmission rod 6. The first-stage reduction gear 15 is located inside the gear housing 16. The secondary reduction worm gear 13 is mounted on the switch base 1 via bearings and one end is connected to the primary reduction gear 15. The middle section of the secondary reduction worm gear 13 is meshed with the secondary reduction worm wheel 14. The secondary reduction worm wheel 14 is connected to one end of the transmission shaft 18. The other end of the transmission shaft 18 is provided with a rotating connection part 19. One end of the insulating transmission rod 6 is rotatably connected to the rotating connection part 19. The other end of the insulating transmission rod 6 is rotatably connected to the grounding switch 5 near the first end.

[0022] like Figures 1-4 As shown, this utility model also discloses the following more optimized specific structures:

[0023] In order to facilitate the transmission of switch state information to the device for the user to understand, the modular grounding switch device for urban rail transit catenary maintenance further comprises a switch state display module, the switch state display module comprises a switch state display plate 21 (L-shaped in the figure), a transmission connecting rod 11, and a switch state signal output seat 10, one end of the two transmission connecting rods 11 is rotatably connected to each other, one end of the switch state display plate 21 is connected to the transmission shaft 18 near the rotating connection part 19, the other end of the switch state display plate 21 is rotatably connected to the other end of one of the transmission connecting rods 11, the switch state display plate 21 is provided with switch state labels (such as "on" and "off"), and the switch state signal output seat 10 is provided with a freely rotatable output shaft (not marked in the figure), the output shaft can be connected to different switch state corresponding wiring ends (not shown in the figure, but a conventional electrical signal output structure) provided on the switch state signal output seat 10 during rotation, and the other end of the other transmission connecting rod 11 is connected to the output shaft.

[0024] In order to further improve the integration, the modular grounding switch device for urban rail transit catenary maintenance further comprises a reduction mechanism housing 22 and a transmission housing 12, the secondary reduction worm 13 and the secondary reduction worm gear 14 are installed in the reduction mechanism housing 22, the reduction mechanism housing 22 is installed on the switch base 1, the secondary reduction worm 13 is installed on the reduction mechanism housing 22 through a bearing, the transmission shaft 18 passes through the corresponding through hole on the reduction mechanism housing 22, the reduction mechanism housing 22, the transmission shaft 18, and the switch state display module are all placed in the transmission housing 12, the transmission housing 12 is installed on the switch base 1 and close to the gear housing 16, one end of the secondary reduction worm 13 passes through the corresponding through hole on the reduction mechanism housing 22 and the corresponding through hole on the transmission housing 12, and the insulating transmission rod 6 passes through the corresponding through hole on the transmission housing 12.

[0025] In order to facilitate application, the modular grounding switch device for urban rail transit catenary maintenance further comprises a whole housing 3, the opening end of the whole housing 3 is connected with the switch base 1, the electric / motor-driven module, the components in the transmission module except the insulating transmission rod 6, and the switch state display module are all placed in the whole housing 3, the whole housing 3 is provided with a manual operation through hole 7 at a position corresponding to the manual driving cylinder 8, and the whole housing 3 is provided with a switch state display through hole (not marked in the figure) at a position corresponding to the switch state display plate 21.

[0026] In order to facilitate the rotation of the manual driving cylinder 8 by the tool, the cylinder wall of the manual driving cylinder 8 is provided with a radial through hole (not marked in the figure) for inserting a driving rod to drive the rotation.

[0027] In order to ensure the insulation performance, the insulating column 4 is an epoxy resin column.

[0028] Figure 3 and Figure 4 The diagram also shows a limiting block 20 located on the drive shaft 18, which cooperates with the corresponding structure on the drive housing 12 to achieve the function of limiting the rotation angle, and is a conventional adaptive structure.

[0029] like Figures 1-4 As shown, in application, this modular grounding switch device is fixedly installed in an electrical cabinet (not shown in the figure) next to the track (which can be underground, ground, or elevated rails). One terminal block 2 is connected to the contact wire or contact rail, and the other terminal block 2 is connected to the track, which is equivalent to grounding through the track. When the rail transit is running normally, the grounding switch 5 is disconnected, such as... Figure 1 As shown, the overhead contact line or contact rail is not grounded and is connected to the AC power supply, which is normal for the train to transmit electrical energy. When it is necessary to inspect the overhead contact line or contact rail, first disconnect the AC power supply to the overhead contact line or contact rail, and then close the grounding switch 5 to ground the overhead contact line or contact rail, so as to avoid safety accidents caused by high voltage charge on the overhead contact line or contact rail due to various reasons or by the failure to completely disconnect the power supply due to accidents.

[0030] In the closing operation of the grounding switch 5, the closing method is first electrically controlled. The rotation of the drive motor 17 shaft is controlled by the switch button installed on the electrical cabinet. The electric drive gear and the first-stage reduction gear 15 cooperate to achieve first-stage reduction, and the second-stage reduction worm gear 13 and the second-stage reduction worm wheel 14 cooperate to achieve second-stage reduction. After that, the transmission shaft 18 and the insulating transmission rod 6 are rotated, thereby driving the grounding switch 5 to close. If the drive motor 17 fails, the grounding switch 5 is manually controlled. The manual drive cylinder 8 is rotated by a tool (if the tool can rotate the drive cylinder 8 without opening the overall housing 3, then the overall housing 3 is not opened; otherwise, the overall housing 3 is opened, and a simple tool such as a screwdriver can be inserted into the radial through hole on the manual drive cylinder 8 to rotate the manual drive cylinder 8), thereby driving the first-stage reduction gear 15 to rotate. The grounding switch 5 is closed through the same transmission process. After this maintenance is completed, the drive motor 17 can be repaired or replaced without affecting the progress of this maintenance.

[0031] When a module of this modular grounding switch device (such as an electric / manual drive module, transmission module, or switch status display module) malfunctions, it is only necessary to separate the faulty module from the associated module, remove the faulty module for repair or replacement, without having to disassemble or replace the entire switch device, thus improving maintenance convenience and efficiency and reducing maintenance costs.

[0032] The above embodiments are only preferred embodiments of the present application, and are not a limitation on the technical solutions of the present application. Any technical solutions that can be realized on the basis of the above embodiments without creative labor should be considered to fall within the scope of protection of the present application.

Claims

1. A modular grounding switch device for maintenance of urban rail transit overhead contact lines, comprising a switch base, a grounding switch, and a terminal block, characterized in that: It also includes insulating posts, an electric / manual drive module, and a transmission module. One end of two parallel insulating posts is connected to the switch base, and the other end of the two insulating posts is connected to two terminal blocks. The first end of the grounding switch is rotatably connected to one terminal block, and the second end is in close contact with the other terminal block. The electric / manual drive module includes a drive motor, a gear housing, an electric drive gear, a manual drive gear, a manual transmission shaft, and a manual drive cylinder. The drive motor is mounted on the switch base, the electric drive gear is mounted on the drive motor's shaft, the gear housing is mounted on one end of the drive motor, and both the electric drive gear and the manual drive gear are housed within the gear housing. The manual transmission shaft is mounted on the gear housing via a bearing, and its inner end is connected to the... The manual drive gear is connected with its outer end located outside the gear housing. The manual drive cylinder is connected to the outer end of the manual transmission shaft. The transmission module includes a primary reduction gear, a secondary reduction worm gear, a secondary reduction worm wheel, a transmission shaft, and an insulated transmission rod. The primary reduction gear is located inside the gear housing and meshes with both the electric drive gear and the manual drive gear. The secondary reduction worm gear is mounted on the switch base via bearings, with one end connected to the primary reduction gear. The middle section of the secondary reduction worm gear meshes with the secondary reduction worm wheel. The secondary reduction worm wheel is connected to one end of the transmission shaft. The other end of the transmission shaft has a rotating connection part. One end of the insulated transmission rod is rotatably connected to the rotating connection part, and the other end of the insulated transmission rod is rotatably connected to a position near the first end of the grounding switch.

2. The modular grounding switch device for maintenance of urban rail transit contact networks according to claim 1, characterized in that: The modular grounding switch device for maintenance of urban rail transit catenary also includes a switch status display module. The switch status display module includes a switch status display board, a transmission link, and a switch status signal output base. One end of the two transmission links is rotatably connected to each other. One end of the switch status display board is connected to the end of the transmission shaft near the rotatable connection part. The other end of the switch status display board is rotatably connected to the other end of one of the transmission links. The switch status display board is provided with a switch status indicator. The switch status signal output base is provided with a freely rotatable output shaft. The output shaft can connect to the terminals corresponding to different switch states on the switch status signal output base during rotation. The other end of the other transmission link is connected to the output shaft.

3. The modular grounding switch device for maintenance of urban rail transit contact networks according to claim 2, characterized in that: The modular grounding switch device for maintenance of urban rail transit catenary also includes a reduction mechanism housing and a transmission housing. The secondary reduction worm and the secondary reduction worm wheel are installed inside the reduction mechanism housing, which is mounted on the switch base. The secondary reduction worm is mounted on the reduction mechanism housing via bearings. The transmission shaft passes through a corresponding through hole on the reduction mechanism housing. The reduction mechanism housing, the transmission shaft, and the switch status display module are all placed inside the transmission housing. The transmission housing is mounted on the switch base and close to the gear housing. One end of the secondary reduction worm passes through the corresponding through hole on the reduction mechanism housing and the corresponding through hole on the transmission housing. The insulated transmission rod passes through the corresponding through hole on the transmission housing.

4. The modular grounding switch device for maintenance of urban rail transit contact networks according to claim 3, characterized in that: The modular grounding switch device for maintenance of urban rail transit contact network also includes an overall housing. The open end of the overall housing is connected to the switch base. The electric / manual drive module, the other components of the transmission module except for the insulating transmission rod, and the switch status display module are all placed inside the overall housing. A manual operation through hole is provided on the overall housing at the position corresponding to the manual drive cylinder, and a switch status display through hole is provided on the overall housing at the position corresponding to the switch status display panel.

5. The modular grounding switch device for maintenance of urban rail transit contact networks according to any one of claims 1-4, characterized in that: The manual drive cylinder has a radial through hole on its wall for driving its rotation by inserting a drive rod.

6. The modular grounding switch device for maintenance of urban rail transit contact networks according to any one of claims 1-4, characterized in that: The insulating column is an epoxy resin column.

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