CN210245337U - Track three-phase alternating current electric grounding knife switch and track three-phase alternating current grounding device - Google Patents

Abstract

The utility model provides a track three-phase alternating current electric grounding switch and track three-phase alternating current earthing device. Track three-phase alternating current electric ground connection switch includes: one fixed contact is a grounding fixed contact which can be electrically connected with a grounding rail, the other fixed contacts are three-phase fixed contacts which can be electrically connected with a power supply rail; the four moving contacts are movably arranged and electrically connected with the fixed contact, the moving contacts correspond to the fixed contacts one to one, and the moving contacts move along a straight line to be far away from or inserted into the fixed contacts so as to realize the separation or connection of the three-phase fixed contacts and the grounding fixed contacts through the moving contacts. The utility model provides a be applied to the poor problem of ground connection switch performance of APM line among the prior art.

Description

Track three-phase alternating current electric grounding knife switch and track three-phase alternating current grounding device

Technical Field

The utility model relates to a switch equipment field particularly, relates to a track three-phase alternating current electric grounding switch and track three-phase alternating current earthing device.

Background

In urban rail transit, APM rail systems are adopted in part of cities, such as Guangzhou subway APM lines, capital airport T3 terminal APM lines and Shanghai rail transit APM lines. The traditional contact network (rail) system basically adopts a direct current power supply system, the voltage grade is mostly 1500v or 750v, but an APM (active power management) line traction power supply system adopts an alternating current three-phase 600v system, and contact rails of the APM line traction power supply system are installed in a five-rail (three power supply rails and two grounding rails) mode. Three power supply rails and a grounding rail are required to be in short circuit when the three-phase grounding device is overhauled, and the three-phase grounding device is a three-phase grounding mode and is different from the grounding requirement of the traditional rail transit. The current grounding mode of the APM line mainly has the following characteristics:

1. the current APM line is overhauled in a manual grounding mode, and is generally grounded by using a three-phase grounding tool or a manual grounding wire. The main manual earth connection that carries on of maintainer has the potential safety hazard, and inefficiency, consumes man-hour.

2. The grounding device of the APM line is mainly installed in a positive line tunnel, the installation space is small, and the overall size design of a disconnecting link and the grounding device is required to be as small as possible;

3. the traditional electric knife switch is designed in a structure form that corresponding knife switches are respectively disclosed in patents CN201020244591.4 and CN 201810749026.4. The movement structural form of the device is that a motor drives a rotating shaft to rotate through a reduction gearbox, so that a moving contact of the disconnecting link is driven to swing for 0-90 degrees in space, and the disconnecting link is switched on and off. The movement structure requires that the contact of the disconnecting link has a certain swing space, and the electrical gap between the disconnecting link and the break between the moving contact and the fixed contact after the moving contact of the disconnecting link is separated is large and generally not smaller than 100 mm. The structure is widely applied to the condition that the requirement on the electric clearance at the cut-off of the knife gate is higher by high voltage (more than 750V). However, the APM wire adopts 600V three-phase alternating current, and the requirement on the gap between a dynamic contact and a static contact is not high and is usually not less than 14 mm. Therefore, when the knife switch moving structure of this type is applied to the APM line, the size of the whole grounding device is increased due to the influence of the moving space of the knife switch and the overall structural size factor of the knife switch, and the applicability is not high for the case that the APM line requires a small installation space for the grounding device.

4. The moving contact structure form of the traditional electric grounding disconnecting link is a two-piece structure. An elastic connection mode is needed between the two moving contacts, so that the moving contacts can clamp the static contact due to certain elasticity between the two moving contacts, and the contact resistance between the moving contact and the static contact is ensured to be as small as possible. The elastic connection is usually a pressure plate spring or other elastic element. Meanwhile, a certain distance must be kept between the contact position of the moving contact and the fixed contact and the pressure plate spring (the structure is similar to a cantilever beam, the longer the cantilever is, the smaller the force is under the same moment, and the shorter the cantilever is, the larger the force is under the same moment), so that the contact force is ensured not to be too large, and the moving contact cannot overcome the friction force generated by the clamping force in the closing process, so that the closing cannot be performed. Therefore, such contact structure forms involve more structural elements, and have a distance requirement for the contact position of the elastic element and the contact, so that such contact structure forms, when applied to the APM line, will inevitably increase the structural size of the whole knife switch and the size of the grounding device, and have low applicability to the APM line.

Therefore, the problem that the grounding knife switch applied to the APM wire is poor in service performance exists in the prior art.

SUMMERY OF THE UTILITY MODEL

A primary object of the utility model is to provide an electronic ground connection switch of track three-phase alternating current and track three-phase alternating current earthing device to solve the poor problem of ground connection switch performance who is applied to the APM line among the prior art.

In order to achieve the above object, according to an aspect of the present invention, there is provided an orbital three-phase ac electric grounding switch, comprising: one fixed contact is a grounding fixed contact which can be electrically connected with a grounding rail, the other fixed contacts are three-phase fixed contacts which can be electrically connected with a power supply rail; the four moving contacts are movably arranged and electrically connected with the fixed contact, the moving contacts correspond to the fixed contacts one by one, and the moving contacts move along a straight line to be far away from or inserted into the fixed contacts so as to realize the separation or connection of the three-phase fixed contacts and the grounding fixed contacts through the moving contacts; and the driving device and one end of the moving contact, which is far away from the fixed contact, are connected with each other to drive the moving contact to move.

Further, the driving device includes: a drive section; one end of the transmission part is connected with the driving part, and the other end of the transmission part is connected with one end, far away from the fixed contact, of the moving contact and drives the moving contact to move.

Further, the transmission portion includes: the rotating shaft of the driving part is meshed with the first transmission gear and drives the first transmission gear to rotate; the transmission shaft penetrates through the rotating center of the first transmission gear and is in rotation stopping connection with the first transmission gear; the connecting shaft is in threaded connection with one end, far away from the first transmission gear, of the transmission shaft, the moving contact is connected with one end, far away from the transmission shaft, of the connecting shaft, and when the transmission shaft rotates, the connecting shaft moves along the axial direction of the transmission shaft so as to enable the moving contact to move horizontally.

Further, the transmission part further includes: the second transmission gear is meshed with the first transmission gear; and the rotating handle is matched with the second transmission gear and can drive the second transmission gear to rotate by operating the rotating handle.

Furthermore, one end of the static contact, which is in contact with the moving contact, is an insertion groove, and the circumferential side wall of the insertion groove is provided with a plurality of deformation joints which are arranged at intervals along the circumferential direction of the insertion groove, so that the insertion groove is provided with a deformation space, and when the moving contact is inserted into the static contact, at least one part of the moving contact extends into the insertion groove.

Furthermore, the four fixed contacts are arranged at equal intervals.

Further, track three-phase alternating current electric-powered earthing switch still includes: the driving device is arranged on the fixed plate; the fixed contact is fixedly arranged on the fixed plate through the first mounting part; and the moving contact is movably arranged on the fixed plate through the second mounting parts respectively and is connected with the connecting shaft of the transmission part of the driving device through the second mounting parts.

Furthermore, the first mounting part and/or the second mounting part are of a plate-shaped structure, wherein four moving contacts are arranged on the second mounting part at intervals; the second installation part and the first installation part are arranged in parallel, the four static contacts are arranged on one side, close to the second installation part, of the first installation part, the second installation part is provided with a switch-off position and a switch-on position, when the second installation part is located at the switch-on position, the moving contact is connected with the static contacts, and when the second installation part is located at the switch-off position, the moving contact is separated from the static contacts.

Further, the rail three-phase alternating current electric grounding disconnecting link further comprises a guide rail, the guide rail is arranged on the fixing plate, and the second mounting portion is slidably arranged on the guide rail.

Furthermore, two ends of the guide rail are connected with the fixed plate, and a gap is formed between the middle part of the guide rail and the fixed plate so that the second mounting part is arranged on the guide rail in a penetrating manner; and/or the guide rails are two and are respectively positioned at two sides of the second mounting part.

The track three-phase alternating current electric grounding disconnecting link further comprises at least one travel switch, the first travel switch is arranged on one side, close to the moving contact, of the static contact, when the second mounting part moves to the switching-on position, the second mounting part triggers the first travel switch, the first travel switch controls the driving part to be powered off, and the second mounting part stops moving; and/or the second travel switch is arranged on one side of the driving device close to the second mounting part, the first travel switch is arranged close to the static contact relative to the second travel switch, when the second mounting part moves to the brake separating position, the second mounting part triggers the second travel switch, the second travel switch controls the driving part to be powered off, and the second mounting part stops moving.

Furthermore, the moving contact is of a reducing structure and comprises a large-diameter section and a small-diameter section, the large-diameter section is inserted into the fixed contact, and the small-diameter section extends into the second mounting portion.

According to the utility model discloses an on the other hand provides a track three-phase alternating current earthing device, including foretell track three-phase alternating current electronic earthing switch and ground connection cabinet, the ground connection cabinet includes: the rail three-phase alternating current electric grounding disconnecting link is arranged in the first accommodating cavity; the second accommodating cavity is internally provided with an air switch, an alternating current electroscopy locking controller and a remote locking controller; the first accommodating cavity, the second accommodating cavity and the cable bin are arranged at intervals; the first sliding door is movably arranged at the opening of the first accommodating cavity and is provided with a first visual window, the switching-off position and the switching-on position of the second mounting part of the rail three-phase alternating current electric grounding disconnecting link are both positioned in the visual range of the first visual window, and one side of the first sliding door, which is far away from the first accommodating cavity, is also provided with an electricity testing lock connected with the rail three-phase alternating current electric grounding disconnecting link; the second sliding door is movably arranged at the opening of the second accommodating cavity and provided with a first display screen, and a display of the alternating current electricity testing locking controller is positioned in the visual range of the first display screen; and the third sliding door is movably covered on the outer sides of the first sliding door and the second sliding door and is provided with a second visual window, and the first visual window and the first display screen are both positioned in the visual range of the second visual window.

Use the technical scheme of the utility model, track three-phase alternating current electronic ground switch in this application includes four static contacts and four moving contacts that the activity set up and be connected with the static contact electricity. One static contact is a grounding static contact which can be electrically connected with a grounding rail, the other static contacts are three-phase static contacts which can be electrically connected with a power supply rail; the moving contacts correspond to the static contacts one to one, and the moving contacts move along a straight line to be far away from or inserted into the static contacts so as to realize the separation or connection of the three-phase static contacts and the grounding static contacts through the moving contacts.

When the track three-phase alternating current electric grounding disconnecting link with the structure is used, the static contacts and the moving contacts which are in one-to-one correspondence are arranged, so that the three-phase static contacts and the grounding static contacts can be connected after the moving contacts are inserted into the corresponding static contacts, grounding operation is completed, and maintenance efficiency can be improved. In addition, in the process of connecting the moving contact and the fixed contact, the moving contact can move along a straight line, so that the movement space can be effectively reduced, and compared with the traditional swing type grounding disconnecting link, the volume of the multiple alternating current grounding disconnecting link is smaller. Thereby effectively improving the service performance of the track three-phase alternating current electric grounding disconnecting link.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows a schematic structural view of a rail three-phase ac electric grounding switch according to an embodiment of the present invention;

FIG. 2 shows a rear view of the rail three-phase AC electric ground switch of FIG. 1;

fig. 3 is a schematic structural diagram illustrating the movable contact of the three-phase ac electric grounding switch of the rail in fig. 1 without inserting a fixed contact;

FIG. 4 is a schematic diagram of the driving mechanism of the three-phase AC electric earthing switch of the rail of FIG. 1;

fig. 5 is a schematic structural diagram illustrating the three-phase ac electric grounding switch of the rail in fig. 1 when a movable contact is driven by a rotating handle;

fig. 6 shows a schematic structural diagram of a movable contact of the rail three-phase alternating current electric grounding disconnecting link in fig. 1;

fig. 7 is a schematic structural diagram illustrating a stationary contact of the three-phase ac electric grounding switch of the rail in fig. 1;

fig. 8 is a schematic diagram illustrating a position relationship when a movable contact of the three-phase ac electric grounding switch of the rail in fig. 1 is inserted into a stationary contact;

FIG. 9 shows a schematic structural diagram of a rail three-phase AC grounding device in the present application;

FIG. 10 is a schematic diagram of the internal structure of the rail three-phase AC grounding assembly of the present application;

fig. 11 is a schematic diagram showing the position relationship between the first sliding door and the second sliding door of the three-phase ac grounding device for the rail of the present application.

Wherein the figures include the following reference numerals:

10. a grounding static contact; 11. inserting the groove; 12. deformation joints; 20. a three-phase static contact; 30. a moving contact; 31. a large diameter section; 32. a small diameter section; 40. a fixing plate; 50. a first mounting portion; 60. a second mounting portion; 70. a guide rail; 80. a drive device; 81. a drive section; 82. a transmission section; 821. a first drive gear; 822. a drive shaft; 823. a connecting shaft; 824. a second transmission gear; 825. rotating the handle; 90. a travel switch; 100. a grounding cabinet; 110. a first accommodating chamber; 120. a second accommodating chamber; 130. a cable compartment; 140. a first sliding door; 141. a first visual window; 150. a second sliding door; 151. a first display screen; 160. a third sliding door; 161. a second viewable window; 170. testing the electricity lock; 180. an air switch; 190. an AC electroscopic latching controller; 200. the controller is remotely closed.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

It is noted that, unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

In the present application, where the contrary is not intended, the use of directional words such as "upper, lower, top and bottom" is generally with respect to the orientation shown in the drawings, or with respect to the component itself in the vertical, perpendicular or gravitational direction; likewise, for ease of understanding and description, "inner and outer" refer to the inner and outer relative to the profile of the components themselves, but the above directional words are not intended to limit the invention.

In order to solve the problem that the grounding switch using performance of the APM line is poor in the prior art, the application provides a track three-phase alternating current electric grounding switch and a track three-phase alternating current grounding device.

In addition, the rail three-phase ac electric earthing switch in the present application may be an earthing switch of an APM line, or may be another kind of multi-phase ac electric earthing switch.

As shown in fig. 1 to 8, the rail three-phase ac electric grounding switch in the present application includes four fixed contacts and four movable contacts 30 movably disposed and electrically connected to the fixed contacts. One static contact is a grounding static contact 10, the grounding static contact 10 can be electrically connected with a grounding rail, the other static contacts are three-phase static contacts 20, and the three-phase static contacts 20 can be electrically connected with a power supply rail; the moving contacts 30 correspond to the fixed contacts one to one, and the moving contacts 30 move along a straight line to be away from or inserted into the fixed contacts, so that the moving contacts 30 can separate or connect the three-phase fixed contacts 20 from the grounding fixed contacts 10.

When the track three-phase alternating current electric grounding disconnecting link with the structure is used, the static contacts and the moving contacts 30 which are in one-to-one correspondence are arranged, so that grounding operation is further completed after the moving contacts 30 are inserted into the corresponding static contacts, a manual grounding mode can be effectively replaced, and the overhauling efficiency can be improved. In addition, in the process of connecting the moving contact 30 with the fixed contact, the moving contact 30 can move along a straight line, so that the movement space can be effectively reduced, and compared with the traditional swing type grounding disconnecting link in a movement form, the volume of the multiple alternating current grounding disconnecting link is relatively smaller. Thereby effectively improving the service performance of the track three-phase alternating current electric grounding disconnecting link.

Specifically, four stationary contacts are disposed at equal intervals from each other. By such an arrangement, the three-phase stationary contact 20 can be effectively prevented from being electrically connected with each other.

Specifically, the rail three-phase alternating current electric-powered earthing switch further comprises a fixing plate 40, a first mounting part 50 and a second mounting part 60. The static contact is fixedly arranged on the fixing plate 40 through the first mounting part 50; the movable contacts 30 are movably disposed on the fixed plate 40 through the second mounting portions 60, respectively. Through setting up fixed plate 40, can play limiting displacement to four static contacts and four moving contacts 30 effectively to can prevent that four static contacts and four moving contacts 30 from appearing rocking, and then guarantee the stability of track three-phase alternating current electric ground switch effectively. By fixedly arranging the static contacts on the first mounting portion 50, the problem of shaking of the static contacts is effectively prevented when the four movable contacts 30 are inserted into the corresponding static contacts. Moreover, the moving contacts 30 are arranged on the second mounting portion 60, so that the four moving contacts 30 can be simultaneously operated through the second mounting portion 60, and further, the three-phase fixed contacts 20 are ensured to be simultaneously electrically connected with the grounding fixed contact 10.

Specifically, the first mounting portion 50 and/or the second mounting portion 60 have a plate-shaped structure, wherein four movable contacts 30 are arranged on the second mounting portion 60 at intervals. Through the arrangement, four fixed contacts or four moving contacts 30 can be effectively arranged on the same plane, and then the four moving contacts 30 can be more easily inserted into the four fixed contacts simultaneously.

In this application, the second mounting portion 60 and the first mounting portion 50 are disposed in parallel, and four fixed contacts are disposed on one side of the first mounting portion 50 close to the second mounting portion 60, the second mounting portion 60 has a switch-off position and a switch-on position, when the second mounting portion 60 is located at the switch-on position, the movable contact 30 is connected to the fixed contact, and when the second mounting portion 60 is located at the switch-off position, the movable contact 30 is separated from the fixed contact. By means of the arrangement, four movable contacts 30 can be further ensured to be inserted into four fixed contacts at the same time.

Optionally, the rail three-phase ac electric-powered earthing switch further comprises a guide rail 70, the guide rail 70 being disposed on the fixing plate 40, and the second mounting portion 60 being slidably disposed on the guide rail 70. By arranging the guide rails 70, the second mounting portion 60 can be limited in the movement process of the second mounting portion 60, so that the four moving contacts 30 can be inserted into the four corresponding static contacts one by one.

Alternatively, both ends of the guide rail 70 are connected to the fixing plate 40, and a gap is formed between the middle portion of the guide rail 70 and the fixing plate 40, so that the second mounting portion 60 is inserted into the guide rail 70. By so arranging, the second mounting portion 60 can be effectively prevented from being disconnected from the guide rail 70 when the second mounting portion 60 slides along the guide rail 70.

In one embodiment of the present application, the guide rails 70 are two and located on both sides of the second mounting portion 60. By this arrangement, the stability of the second mounting portion 60 when moving along the guide rail 70 can be effectively improved. Moreover, the arrangement can also ensure that the second mounting part 60 does not deflect in the process of moving along the guide rail 70, and further, can effectively ensure that the four movable contacts 30 can be simultaneously inserted into corresponding fixed contacts.

Specifically, the rail three-phase ac electric grounding switch further includes a driving device 80 to drive the four movable contacts 30 to move, and the driving device 80 is disposed on the fixed plate 40, and the driving device 80 includes a driving portion 81 and a transmission portion 82. One end of the transmission portion 82 is connected to the driving portion 81, and the other end of the transmission portion 82 is connected to one end of the second mounting portion 60 away from the movable contact 30 and drives the second mounting portion 60 to move. Through the arrangement, the mode that the driving device 80 drives the moving contact 30 to move can be used for replacing the manual operation mode, so that the automation of the communication of the guide alternating-current switch can be realized, and the safety performance of the rail three-phase alternating-current electric grounding disconnecting link is ensured.

Specifically, as shown in fig. 4, the transmission section 82 includes a first transmission gear 821, a transmission shaft 822, and a connection shaft 823. The rotating shaft of the driving part 81 is meshed with the first transmission gear 821 and drives the first transmission gear 821 to rotate; the transmission shaft 822 passes through the rotation center of the first transmission gear 821 and is in rotation stopping connection with the first transmission gear 821; the connecting shaft 823 is in threaded connection with one end of the transmission shaft 822, which is far away from the first transmission gear 821, and the second mounting portion 60 is connected with one end of the connecting shaft 823, which is far away from the transmission shaft 822, so that when the transmission shaft 822 rotates, the connecting shaft 823 moves along the axial direction of the transmission shaft 822 to enable the movable contact 30 to translate. By such an arrangement, the stability of the transmission part 82 can be effectively ensured, and thus the movable contact 30 can be accurately controlled.

Specifically, as shown in fig. 4 and 5, the transmission section 82 further includes a second transmission gear 824 and a rotation handle 825. The second transmission gear 824 is meshed with the first transmission gear 821; the rotating handle 825 is engaged with the second transmission gear 824, and the second transmission gear 824 can be driven to rotate by operating the rotating handle 825. With this arrangement, when the driving unit 81 cannot operate normally, the movable contacts 30 can be driven manually. The specific way is to manually rotate the rotating handle 825 to drive the second transmission gear 824 to rotate and drive the first transmission gear 821 to rotate, so as to complete the control of the movable contact 30.

Specifically, as shown in fig. 1 and fig. 3, the rail three-phase ac electric grounding switch further includes at least one travel switch 90, the first travel switch 90 is disposed on one side of the fixed contact close to the movable contact 30, when the second mounting portion 60 moves to the switching-on position, the second mounting portion 60 triggers the first travel switch 90, the first travel switch 90 controls the power-off of the driving portion 81, and the second mounting portion 60 stops moving; the second travel switch 90 is disposed on a side of the driving device 80 close to the second mounting portion 60, and the first travel switch 90 is disposed close to the stationary contact relative to the second travel switch 90, when the second mounting portion 60 moves to the brake-separating position, the second mounting portion 60 triggers the second travel switch 90, the second travel switch 90 controls the driving portion 81 to be powered off, and the second mounting portion 60 stops moving. By this arrangement, it is possible to realize intelligent adjustment of the driving device 80 by detecting the position of the second mounting portion 60 by the stroke switch 90 and controlling the driving device 80 by the detection result.

Specifically, as shown in fig. 7, one end of the fixed contact, which is in contact with the movable contact 30, is an insertion groove 11, and a circumferential side wall of the insertion groove 11 has a plurality of deformation joints 12 arranged at intervals along the circumferential direction thereof, so that the insertion groove 11 has a deformation space, and when the movable contact 30 is inserted into the fixed contact, at least a portion of the movable contact 30 extends into the insertion groove 11. Through setting up like this, can guarantee that the static contact can realize the formula of relying on oneself locking to the moving contact 30 after inserting the insertion groove 11 of static contact 30 to compare with driven track three-phase alternating current electric grounding switch, the community has used elastic element, thereby makes the overall structure of track three-phase alternating current electric grounding switch in this application simpler, and has guaranteed the reliability of being connected between moving contact 30 and the static contact.

Specifically, as shown in fig. 6, the movable contact 30 has a diameter-variable structure and includes a large-diameter section 31 and a small-diameter section 32, the large-diameter section 31 is inserted into the stationary contact, and the small-diameter section 32 extends into the second mounting portion 60. With this arrangement, the length of the movable contact 30 inserted into the second mounting portion 60 can be limited by the connection between the large-diameter section 31 and the small-diameter section 32.

Specifically, as shown in fig. 9 to 11, the rail three-phase ac grounding device in the present application includes the rail three-phase ac electric grounding switch and the grounding cabinet 100, and the grounding cabinet 100 includes: the track three-phase alternating-current electric grounding disconnecting link is arranged in the first accommodating cavity 110; the second accommodating cavity 120 is internally provided with an air switch 180, an alternating current electroscopy locking controller 190 and a remote locking controller 200; the cable bin 130 is arranged among the first accommodating cavity 110, the second accommodating cavity 120 and the cable bin 130 at intervals; the first sliding door 140 is movably arranged at the opening of the first accommodating cavity 110, the first sliding door 140 is provided with a first visual window 141, the switching-off position and the switching-on position of the second mounting part 60 of the rail three-phase alternating current electric grounding disconnecting link are both positioned in the visual range of the first visual window 141, and one side of the first sliding door 140, which is far away from the first accommodating cavity 110, is further provided with an electricity testing lock 170 connected with the rail three-phase alternating current electric grounding disconnecting link; the second sliding door 150 is movably arranged at the opening of the second accommodating cavity 120, the second sliding door 150 is provided with a first display screen 151, and a display of the alternating current electroscopic locking controller 190 is positioned in a visible range of the first display screen 151; the third sliding door 160, the third sliding door 160 is movably covered on the outer side of the first sliding door 140 and the second sliding door 150, and the third sliding door 160 has a second visual window 161, and the first visual window 141 and the first display screen 151 are both located within the visual range of the second visual window 161.

From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects:

1. the automatic grounding operation of the disconnecting link can be effectively realized by replacing manual operation;

2. the operation time can be effectively saved, the working efficiency is improved, and the operation safety is improved;

3. compact structure and space saving.

It is obvious that the above described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (13)

1. An orbital three-phase alternating current electric grounding switch, comprising:

one fixed contact is a grounding fixed contact (10), the grounding fixed contact (10) can be electrically connected with a grounding rail, the rest fixed contacts are three-phase fixed contacts (20), and the three-phase fixed contacts (20) can be electrically connected with a power supply rail;

the four moving contacts (30) are movably arranged and electrically connected with the fixed contact, the moving contacts (30) correspond to the fixed contacts one by one, and the moving contacts (30) move along a straight line to be far away from or inserted into the fixed contacts so as to realize the separation or connection of the three-phase fixed contact (20) and the grounding fixed contact (10) through the moving contacts (30);

and the driving device (80) is connected with one end, far away from the fixed contact, of the movable contact (30) so as to drive the movable contact (30) to move.

2. The orbital three-phase alternating current electric grounding switch according to claim 1, characterized in that said driving means (80) comprises:

a drive unit (81);

one end of the transmission part (82) is connected with the driving part (81), and the other end of the transmission part (82) is connected with one end, far away from the fixed contact, of the movable contact (30) and drives the movable contact (30) to move.

3. The orbital three-phase alternating current electric grounding switch according to claim 2, characterized in that the transmission part (82) comprises:

a first transmission gear (821), wherein the rotating shaft of the driving part (81) is meshed with the first transmission gear (821) and drives the first transmission gear (821) to rotate;

the transmission shaft (822) penetrates through the rotation center of the first transmission gear (821) and is in rotation stopping connection with the first transmission gear (821);

the connecting shaft (823) is in threaded connection with one end, far away from the first transmission gear (821), of the transmission shaft (822), the moving contact (30) is connected with one end, far away from the transmission shaft (822), of the connecting shaft (823), and when the transmission shaft (822) rotates, the connecting shaft (823) moves along the axial direction of the transmission shaft (822) so that the moving contact (30) can move in a horizontal moving mode.

4. The orbital three-phase alternating current electric grounding switch according to claim 3, characterized in that the transmission part (82) further comprises:

a second transmission gear (824), the second transmission gear (824) meshing with the first transmission gear (821);

the rotating handle (825), the rotating handle (825) with the second transmission gear (824) cooperation, through operating the rotating handle (825) can drive the second transmission gear (824) and rotate.

5. The rail three-phase alternating current electric grounding disconnecting link according to claim 1, wherein one end of the static contact contacting the moving contact (30) is an insertion groove (11), and a plurality of deformation joints (12) are arranged on a circumferential side wall of the insertion groove (11) at intervals along the circumferential direction of the insertion groove, so that the insertion groove (11) has a deformation space, and when the moving contact (30) is inserted into the static contact, at least one part of the moving contact (30) extends into the insertion groove (11).

6. The orbital three-phase alternating current electric grounding switch as set forth in claim 1, wherein four of said stationary contacts are arranged at equal intervals from each other.

7. The orbital three-phase alternating current electric grounding switch according to any one of claims 1 to 6, further comprising:

a fixed plate (40), the driving device (80) being arranged on the fixed plate (40);

the fixed contact is fixedly arranged on the fixing plate (40) through the first mounting part (50);

the moving contact (30) is movably arranged on the fixing plate (40) through the second mounting part (60), and the moving contact (30) is connected with a connecting shaft (823) of a transmission part (82) of the driving device (80) through the second mounting part (60).

8. The orbital three-phase alternating current electric-powered earthing switch according to claim 7, characterized in that the first mounting part (50) and/or the second mounting part (60) is a plate-like structure, wherein,

the four moving contacts (30) are arranged on the second mounting part (60) at intervals;

the second installation part (60) with first installation part (50) parallel arrangement, and four the static contact sets up first installation part (50) is close to one side of second installation part (60), second installation part (60) have and divide floodgate position and closing position, work as second installation part (60) are in during the closing position, moving contact (30) with the static contact is connected, work as second installation part (60) are in during the branch floodgate position, moving contact (30) with the static contact separation.

9. The orbital three-phase alternating current electric grounding switch according to claim 8, further comprising a guide rail (70), wherein the guide rail (70) is disposed on the fixing plate (40), and wherein the second mounting portion (60) is slidably disposed on the guide rail (70).

10. The orbital three-phase alternating current electric-powered earthing switch according to claim 9,

two ends of the guide rail (70) are connected with the fixing plate (40), and a gap is formed between the middle part of the guide rail (70) and the fixing plate (40) so that the second mounting part (60) penetrates through the guide rail (70); and/or

The guide rails (70) are two and are respectively located on two sides of the second installation portion (60).

11. The orbital three-phase AC electric grounding switch of claim 8, further comprising at least one travel switch (90),

the first travel switch (90) is arranged on one side, close to the movable contact (30), of the fixed contact, when the second mounting part (60) moves to the switching-on position, the second mounting part (60) triggers the first travel switch (90), the first travel switch (90) controls the driving part (81) to be powered off, and the second mounting part (60) stops moving; and/or

The second travel switch (90) is arranged on one side, close to the second mounting portion (60), of the driving device (80), the first travel switch (90) is arranged close to the fixed contact relative to the second travel switch (90), when the second mounting portion (60) moves to the brake separating position, the second mounting portion (60) triggers the second travel switch (90), the second travel switch (90) controls the driving portion (81) to be powered off, and the second mounting portion (60) stops moving.

12. The rail three-phase alternating current electric grounding switch as claimed in claim 7, wherein the movable contact (30) is of a diameter-variable structure and comprises a large-diameter section (31) and a small-diameter section (32), the large-diameter section (31) is inserted into the fixed contact, and the small-diameter section (32) extends into the second mounting portion (60).

13. A rail three-phase ac earthing device, characterized in that it comprises the rail three-phase ac electric earthing knife-switch and earthing cabinet (100) of any one of claims 1 to 12, said earthing cabinet (100) comprising:

the rail three-phase alternating current electric grounding disconnecting link is arranged in the first accommodating cavity (110);

the second accommodating cavity (120) is internally provided with an air switch (180), an alternating current electroscopy locking controller (190) and a remote locking controller (200);

the cable bin (130) is arranged among the first accommodating cavity (110), the second accommodating cavity (120) and the cable bin (130) at intervals;

the first sliding door (140) is movably arranged at an opening of the first accommodating cavity (110), the first sliding door (140) is provided with a first visual window (141), the switching-off position and the switching-on position of the second installation part (60) of the rail three-phase alternating current electric grounding disconnecting link are both positioned in the visual range of the first visual window (141), and one side, far away from the first accommodating cavity (110), of the first sliding door (140) is further provided with an electricity testing lock (170) connected with the rail three-phase alternating current electric grounding disconnecting link;

the second sliding door (150), the second sliding door (150) is movably arranged at the opening of the second accommodating cavity (120), the second sliding door (150) is provided with a first display screen (151), and a display of the alternating current electroscopic locking controller (190) is positioned in the visual range of the first display screen (151);

the third sliding door (160), the movable cover of the third sliding door (160) is arranged at the outer side of the first sliding door (140) and the second sliding door (150), the third sliding door (160) is provided with a second visual window (161), and the first visual window (141) and the first display screen (151) are both positioned in the visual range of the second visual window (161).

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