A device integrating busbar and isolating grounding switch and application equipment

Abstract

The present invention discloses a device and application equipment for integrating a busbar and an isolating earthing switch. The device for integrating a busbar and an isolating earthing switch provided by the present invention integrates the busbar and the isolating earthing switch into a tank body with a cylindrical pressure-bearing structure. The tank body with a cylindrical pressure-bearing structure has a strong ability to withstand high pressure, so that the device for integrating a busbar and an isolating earthing switch has the possibility of selecting high-pressure air as an insulating gas, thereby ensuring the environmental friendliness of the device. In addition, since at least three of the four ports of the tank body are perpendicular to each other, the size of the tank body can be miniaturized, the structure of the device for integrating a busbar and an isolating earthing switch is optimized, and the device for integrating a busbar and an isolating earthing switch can be applied to the technical field of medium-voltage inflatable switch cabinets.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power equipment, and in particular to a device integrating a busbar and an isolating grounding switch and application equipment. Background Art

[0002] In the field of power equipment, devices integrating busbars and isolating earthing switches are often too large to be used in the field of medium-voltage gas-filled switchgear technology due to environmental protection and insulation performance considerations.

[0003] Therefore, how to optimize the structure while meeting environmental protection requirements has become a technical problem that needs to be urgently solved by technical personnel in this field. Summary of the invention

[0004] In view of this, the present invention provides a device integrating a busbar and an isolating grounding switch to optimize the structure while meeting environmental protection requirements.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A device integrating a busbar and an isolating earthing switch comprises a tank body, a busbar and an isolating earthing switch, wherein the busbar and the isolating earthing switch are arranged in the tank body; the tank body is provided with four ports, at least three of the four ports are perpendicular to each other, the busbar passes through and connects the first port and the second port of the four ports, the outlet line of the isolating earthing switch is arranged at the third port of the four ports, and the grounding contact seat of the isolating earthing switch is arranged at the fourth port of the four ports.

[0007] Preferably, the tank body comprises a longitudinal portion, a transverse portion and a vertical portion which are vertically connected in pairs, the first port and the second port are arranged at two ends of the transverse portion, the third port is arranged in the vertical portion, and the fourth port is arranged in the longitudinal portion.

[0008] Preferably, the busbar is a three-phase busbar, and each phase of the busbar includes a first end, a first middle portion, and a second end connected in sequence by arc transition, the first end is connected to the first port via a first partition insulator, and the second end is connected to the second port via a second partition insulator; and the axes of the first middle portions of the three-phase busbars are all located on the first plane; the first plane is parallel to the second plane passing through the center line of the first port, the second plane is perpendicular to the center line of the fourth port, and the center line of the second port is located on the second plane; with the second plane as the boundary, the first plane is arranged in a direction away from the fourth port.

[0009] Preferably, the first ends of the three-phase busbars are arranged in a first triangle at the connection position of the first port; and the second ends of the three-phase busbars are arranged in a second triangle at the connection position of the second port.

[0010] Preferably, the first end and the second end are both arc-shaped structures.

[0011] Preferably, the first triangle and the second triangle are equilateral triangles.

[0012] Preferably, the isolating grounding switch is a three-phase isolating grounding switch, and each phase of the isolating grounding switch includes a grounding contact seat, an intermediate contact seat, a static contact seat and a moving contact, one end of the static contact seat is electrically connected to and supported by the corresponding busbar, the moving contact is driven and connected to the driving member through a transmission member, the driving member is arranged on the fourth port, the outlet line is connected to the intermediate contact seat, and is connected to the third port through a third partition insulator; the moving contact, the grounding contact seat, the intermediate contact seat and the static contact seat are coaxially arranged; the three-phase isolating grounding switches are arranged in a third triangle around the center line of the fourth port.

[0013] Preferably, the outgoing line of the isolating and earthing switch of each phase includes a third end, a second middle part and a fourth end connected in sequence with circular arc transitions, the third end is connected to the corresponding middle contact seat, and the fourth end is connected to the third port; the axes of the second middle parts of the outgoing lines of the three-phase isolating and earthing switches are all located on the third plane; the third plane is parallel to the fourth plane passing through the center line of the three ports, and the fourth plane is perpendicular to the center line of the fourth port.

[0014] Preferably, with the fourth surface as the boundary, the third surface is arranged in a direction close to the fourth port.

[0015] Preferably, the third end portion is integrally formed with the corresponding middle contact seat.

[0016] Preferably, the connection position between the fourth end of the outgoing line in the three-phase isolating and grounding switch and the third port is arranged in a fourth triangle.

[0017] Preferably, the third triangle and the fourth triangle are equilateral triangles.

[0018] Preferably, the third end and the fourth end are arc-shaped structures.

[0019] Preferably, the first partition insulator and the second partition insulator are pot-type insulators.

[0020] Preferably, one end of the busbar is slidably connected to the shielding cover on the insert on the concave surface of the second partition insulator through the first transition conductor, and the other end of the busbar is fixed on the insert on the convex surface of the first partition insulator.

[0021] The present invention also discloses an application device, wherein the application device uses the device of integrated busbar and isolating grounding switch as described in any one of the above items.

[0022] It can be seen from the above technical scheme that the device for integrating busbar and isolating earthing switch provided by the present invention integrates busbar and isolating earthing switch into a tank body with a cylindrical pressure-bearing structure, and the tank body with a cylindrical pressure-bearing structure has a strong ability to withstand high pressure, so that the device for integrating busbar and isolating earthing switch has the possibility of selecting high-pressure air as insulating gas, thereby ensuring the environmental protection of the device. In addition, since at least three of the four ports of the tank body are perpendicular to each other, the size of the tank body can be miniaturized, and the structure of the device for integrating busbar and isolating earthing switch is optimized, so that the device for integrating busbar and isolating earthing switch can be applied to the technical field of medium-voltage inflatable switch cabinets. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] 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 these drawings without paying creative work.

[0024] Figure 1 The device of the integrated busbar and the isolating grounding switch provided in the first embodiment of the present invention mainly reflects the axial stereoscopic structural schematic diagram of the tank body;

[0025] Figure 2 A cross-sectional structural diagram of an integrated busbar and isolating grounding switch provided in a first embodiment of the present invention;

[0026] Figure 3 A rear perspective view of the device of the integrated busbar and the isolating earthing switch provided in the first embodiment of the present invention with the tank body hidden;

[0027] Figure 4 A rear view of the device of the integrated busbar and isolating earthing switch provided in the first embodiment of the present invention with the tank hidden;

[0028] Figure 5 A schematic diagram of the axial stereoscopic structure of the device of the integrated busbar and the isolating grounding switch provided in the first embodiment of the present invention after the tank is hidden;

[0029] Figure 6A schematic diagram of the axial stereoscopic structure of the device of the integrated busbar and isolating earthing switch provided in the second embodiment of the present invention after the tank body and the flange are hidden.

[0030] Among them, 100 is the tank, 200 is the busbar, 300 is the isolating earthing switch, 400 is the driving part, and 500 is the transmission part;

[0031] 101 is the first port, 102 is the second port, 103 is the third port, 104 is the fourth port; 201 is the first end, 202 is the second end, 203 is the second end; 301 is the outlet, 302 is the moving contact, 303 is the grounding contact seat, 304 is the middle contact seat, and 305 is the static contact seat;

[0032] 1011 is the first partition insulator, 1021 is the second partition insulator, 1031 is the third partition insulator, 1041 is the flange cover; 3011 is the third end, 3012 is the second middle part, 3013 is the fourth end; 401 is the motor, 501 is the lead screw, and 502 is the fixing part;

[0033] 100a is the transverse portion, 100b is the longitudinal portion, and 100c is the vertical portion; 200a is the first transition conductor, and 200b is the second transition conductor; 1011a is the convex surface, and 1021a is the concave surface. DETAILED DESCRIPTION

[0034] Technical term explanation:

[0035] Three-position switch: A switching element with three working positions: conduction, isolation and grounding.

[0036] Gas-filled switchgear: A switchgear in which primary conductive components such as circuit breakers, disconnectors, earthing switches, busbars, etc. are sealed in one or more welded metal boxes and filled with insulating gas at a certain pressure.

[0037] Round tank structure: A sealed container cast from aluminum alloy, equipped with primary conductive components such as circuit breakers, disconnectors, grounding switches, busbars, etc., carrying insulating gas at a certain pressure.

[0038] Square box structure: a rectangular or similar shaped metal sealed container welded from stainless steel plates.

[0039] Insulating gas: a gas medium with insulating properties, such as SF6, air, nitrogen and other gases.

[0040] At present, in the field of 40.5kV medium-voltage gas-filled switch technology, the mainstream products use SF6 as the insulating medium and the vacuum interrupter as the box-type metal enclosed structure of the breaking element. From the development trend of environmentally friendly alternative products, using air (dry air, clean air) to replace SF6 as the insulating medium and using the vacuum interrupter as the breaking element is the most feasible and promising technical solution. However, since the insulation performance of air is only about one-third of that of SF6, the inventors have found through research that when the pressure of the insulating gas is increased, its insulation performance will be enhanced. The SF6 filling pressure of the existing 40.5kV gas-filled switch cabinet is generally 1.2 to 1.4 bar (absolute pressure). If SF6 is directly replaced with air, the size of the switch cabinet will be very large. Therefore, under the requirement of maintaining the size equivalent to that of SF6 products, using air as the insulating gas can only increase the filling pressure of the air. However, for the square box structure welded with stainless steel plates in the prior art, the gas box cannot withstand excessively high filling pressure (generally speaking, when the absolute pressure of the gas exceeds 2 bar, the square box will undergo serious permanent deformation or even leak). Although the deformation of the air box can be improved by increasing the number of reinforcing ribs, this method leads to increased costs, complex processing and manufacturing, and poor appearance, and still cannot avoid the hidden dangers caused by the deformation of the air box. Therefore, the inventor believes that in the field of 40.5kV medium-voltage inflatable switch technology, the square box structure is not suitable for air as an insulating medium.

[0041] The use of a round can shell commonly used in the field of high-voltage gas-filled switch technology as a metal shell can better solve the problem of withstanding high gas pressure. However, the switchgear using a round can shell adopts a flange structure for connecting the inlet and outlet lines with the pot-type insulator, which will occupy a certain size. Therefore, the design size of the switch components that can be used in the round can shell will be smaller than the utilization rate of the box-type container of the same size, which conflicts with the compact requirements of the 40.5kV medium-voltage gas-filled switch. In addition, in order to make it easier for users and operation and maintenance personnel of traditional medium-voltage switchgear to accept the round can shell, the inflation pressure should not be too high, which is contrary to the insulation requirements of the 40.5kV medium-voltage gas-filled switch.

[0042] Based on the above factors, the technical core of the present invention is to provide a device and application equipment of an integrated busbar and an isolating earthing switch, so as to optimize the structure while meeting environmental protection requirements, so that the device of the integrated busbar and the isolating earthing switch can be applied to the field of 40.5kV medium-voltage inflatable switch technology.

[0043] 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.

[0044] See also Figure 1-Figure 6 In some embodiments of the present invention, a device integrating a busbar and an isolating earthing switch is disclosed, which may include a tank body 100 with a cylindrical pressure-bearing structure, a busbar 200 and an isolating earthing switch 300, wherein the busbar 200 and the isolating earthing switch 300 are arranged in the tank body 100; four ports are arranged on the tank body 100, at least three of the four ports are perpendicular to each other, the busbar 200 penetrates and connects a first port 101 and a second port 102 of the four ports, an outlet line 301 of the isolating earthing switch 300 is arranged at a third port 103 of the four ports, and a grounding contact seat 303 of the isolating earthing switch 300 is arranged at a fourth port 104 of the four ports.

[0045] The device for integrating busbar and isolating earthing switch provided by the present invention integrates busbar 200 and isolating earthing switch 300 into a tank body 100 with a cylindrical pressure-bearing structure, and the tank body 100 with a cylindrical pressure-bearing structure has a strong ability to withstand high pressure, so that the device for integrating busbar and isolating earthing switch has the possibility of selecting high-pressure air as insulating gas, thereby ensuring the environmental protection of the device. In addition, since at least three of the four ports of the tank body 100 are perpendicular to each other, the space utilization rate of the tank body 100 is improved, so the size of the tank body 100 can be miniaturized, and the structure of the device for integrating busbar and isolating earthing switch is optimized, so that the device for integrating busbar and isolating earthing switch can be applied to the technical field of medium-voltage inflatable switch cabinets.

[0046] The tank body 100 supports the busbar 200 and the isolating grounding switch 300 and is sealed with insulating gas. In order to improve the high-pressure resistance of the tank body 100, the tank body 100 in the embodiment of the present invention is a cylindrical pressure-bearing structure. Therefore, the pressure of the insulating gas filled in the tank body 100 can be relatively large without damaging the tank body 100.

[0047] The tank body 100 has four ports, at least three of which are perpendicular to each other. For ease of understanding, a three-dimensional rectangular coordinate system is established. The first port 101 is located on the ox axis, the third port 103 is located on the oy axis, and the fourth port 104 is located on the oz axis. Then, the first port 101, the third port 103 and the fourth port 104 are perpendicular to each other, and the second port 102 is set at any angle to the first port 101, the third port 103 and / or the fourth port 104. From the perspective of the ox axis, the size of the entire tank body 100 does not exceed the distance between the first port 101 and the second port 102, from the perspective of the oy axis, the size of the entire tank body 100 does not exceed the distance between the third port 103 and the second port 102, and from the perspective of the oz axis, the size of the entire tank body 100 does not exceed the distance between the fourth port 104 and the second port 102. Therefore, the size of the tank body 100 is more compact.

[0048] In some embodiments of the present invention, the first port 101, the third port 103 and the fourth port 104 of the tank body 100 are perpendicular to each other, the second port 102, the third port 103 and the fourth port 104 are perpendicular to each other, and the first port 101 and the second port 102 are coaxially arranged. For ease of understanding, a three-dimensional rectangular coordinate system is established. The first port 101 and the second port 102 are both located on the ox axis, the third port 103 is located on the oy axis, and the fourth port 104 is located on the oz axis. From the perspective of the ox axis, the size of the entire tank body 100 is equal to the distance between the first port 101 and the second port 102. From the perspective of the oy axis, the size of the entire tank body 100 does not exceed the distance between the third port 103 and the tank wall opposite to the third port 103. From the perspective of the oz axis, the size of the entire tank body 100 does not exceed the distance between the fourth port 104 and the tank wall opposite to the fourth port 104. Therefore, the size of the tank body 100 is more compact.

[0049] In some embodiments of the present invention, the tank body 100 may include a longitudinal portion 100b, a transverse portion 100a, and a vertical portion 100c that are vertically connected in pairs, a first port 101 and a second port 102 are arranged at both ends of the transverse portion 100a, a third port 103 is arranged in the vertical portion 100c, and a fourth port 104 is arranged in the longitudinal portion 100b. For ease of understanding, a three-dimensional rectangular coordinate system is established, wherein the transverse portion 100a extends along the ox axis, the vertical portion 100c extends along the oy axis, and the longitudinal portion 100b extends along the oz axis, so that the transverse portion 100a, the vertical portion 100c, and the longitudinal portion 100b are perpendicular to each other.

[0050] To further optimize the structure of the tank 100, in some embodiments of the present invention, the transverse portion 100a, the vertical portion 100c and the longitudinal portion 100b are arranged perpendicular to each other, and the vertical portion 100c is located at the transition area between the transverse portion 100a and the longitudinal portion 100b. This arrangement can make the size of the tank 100 more compact.

[0051] In some embodiments of the present invention, the busbar 200 may be a three-phase busbar 200. When the busbar 200 is a three-phase busbar 200, each phase busbar 200 includes a first end 201, a first middle portion 202, and a second end 203 connected in sequence by arc transition. The first end 201 is connected to the first port 101 through a first partition insulator 1011, and the second end 203 is connected to the second port 102 through a second partition insulator 1021; and the axes of the first middle portion 202 of the three-phase busbar 200 are all located on the first plane α. Since the first middle portion 202 of the three-phase busbar 200 is located on the first plane α, the effective area occupied by the three-phase busbar 200 is reduced along the extension direction of the three-phase busbar 200, thereby optimizing the arrangement of the busbar 200 and reducing the effective occupied space of the busbar 200. Therefore, the size of the tank 100 can be designed to be more compact.

[0052] The angle between the first surface α and the center line O1 of the fourth port 104 is 0° to 90°. When the angle is 90°, the first surface α is parallel to the second surface β passing through the center line of the first port 101, the second surface β is perpendicular to the center line O1 of the fourth port 104, and the center line of the second port 102 is located on the second surface β. In this way, the distance between the first surface α and the tank wall of the transverse portion 100a is minimized, thereby further optimizing the arrangement of the busbar 200 and improving the utilization rate of the internal space of the transverse portion 100a.

[0053] On the basis of some of the above embodiments, with the second surface β as the boundary, the first surface α is arranged in a direction away from the fourth port 104; that is, the first middle portion 202 of the three-phase busbar 200 is closer to the tank wall of the transverse portion 100a, thereby further improving the utilization rate of the internal space of the transverse portion 100a.

[0054] In some embodiments of the present invention, the first end 201 of the three-phase busbar 200 is arranged in a triangular shape at the connection position of the first port 101. On the premise of meeting the wiring requirements, the diameter of the first port 101 can be reduced, and the diameter of the first partition insulator 1011 arranged at the first port 101 can also be reduced; and / or the second end 203 of the three-phase busbar 200 is arranged in a triangular shape at the connection position of the second port 102. On the premise of meeting the wiring requirements, the diameter of the second port 102 can be reduced, and the diameter of the second partition insulator 1021 arranged at the second port 102 can also be reduced.

[0055] Furthermore, the first end 201 of the three-phase busbar 200 is arranged in an equilateral triangle at the connection position of the first port 101. On the premise of meeting the wiring requirements, the diameter of the first port 101 can be further reduced, and the diameter of the first partition insulator 1011 arranged at the first port 101 can also be further reduced; and / or the second end 203 of the three-phase busbar 200 is arranged in an equilateral triangle at the connection position of the second port 102. On the premise of meeting the wiring requirements, the diameter of the second port 102 can be further reduced, and the diameter of the second partition insulator 1021 arranged at the second port 102 can also be further reduced.

[0056] The following is a detailed introduction to the three-phase busbar 200:

[0057] The three-phase busbars 200 are respectively the first busbar, the second busbar and the third busbar. The first ends 201 of the first busbar, the second busbar and the third busbar are electrically connected to the first partition insulator 1011 , and the second ends 203 of the first busbar, the second busbar and the third busbar are electrically connected to the second partition insulator 1021 .

[0058] The axis of the first middle portion 202 of the first busbar, the axis of the first middle portion 202 of the second busbar and the axis of the first middle portion 202 of the third busbar are located within the first plane α; the first end portion 201 of the first busbar is electrically connected to the second partition insulator 1021 through the first transition conductor 200a, the first end portion 201 of the second busbar is electrically connected to the second partition insulator 1021 through the second transition conductor 200b and the first end portion 201 of the third busbar is electrically connected to the second partition insulator 1021 through the third transition conductor.

[0059] It should be noted that the first partition insulator 1011 and the second partition insulator 1021 may be pot-type insulators. One end of the busbar 200 is slidably connected to the shielding cover on the insert of the concave surface 1021a of the second partition insulator 1021 through the first transition conductor 200a, and the other end of the busbar 200 is fixed to the insert of the convex surface 1011a of the first partition insulator 1011. With such a configuration, when the busbar 200 is installed, there is a certain adjustable space between the first partition insulator 1011 and the second partition insulator 1021, thereby facilitating the installation of the busbar 200.

[0060] The isolating grounding switch 300 may be a three-phase isolating grounding switch 300. When the isolating grounding switch 300 is used, each phase of the isolating grounding switch 300 includes a grounding contact seat 303, an intermediate contact seat 304, a static contact seat 305 and a moving contact 302. The moving contact 302 is driven and connected to the driving member 400 through a transmission member 500. The driving member 400 is arranged on the fourth port 104. The outlet line 301 is connected to the intermediate contact seat 304 and is connected to the third port 103 through a third partition insulator 1031. The moving contact 302, the grounding contact seat 303, the intermediate contact seat 304 and the static contact seat 305 are coaxially arranged, and one end of the static contact seat 305 is electrically connected to and supported by the corresponding busbar 200. The three-phase isolating grounding switch 300 is arranged in a triangle around the center line O1 of the fourth port 104. It can be seen that the isolating grounding switch 300 in the embodiment of the present invention is a linear drive form of the driving member 400.

[0061] The moving contact 302, the grounding contact seat 303, the intermediate contact seat 304, and the stationary contact seat 305 are described in detail below:

[0062] The grounding contact is provided with contact fingers, contact sheets or spiral contacts. The grounding contact seats 303 of the three-phase isolating grounding switch 300 are respectively the first grounding contact seat 303, the second grounding contact seat 303 and the third grounding contact seat 303.

[0063] The first, second and third grounding contact sockets 303, 303 are fixed on the flange cover 1041 of the fourth port 104. In a specific embodiment of this solution, the first, second and third grounding contact sockets 303, 303 are arranged in a triangle around the center line O1 of the fourth port 104.

[0064] The first grounding contact seat 303, the second grounding contact seat 303 and the third grounding contact seat 303 may be directly connected to the flange cover 1041, or may be connected to the flange cover 1041 through a connecting piece. In the embodiment where the first grounding contact seat 303, the second grounding contact seat 303 and the third grounding contact seat 303 are connected to the flange cover 1041 through a connecting piece, the connecting piece includes a connecting column and a connecting piece coaxially arranged with the flange cover 1041, the surface where the connecting piece is located is perpendicular to the axis of the connecting column, the connecting pieces are evenly distributed along the circumference of the connecting column, one end of the connecting piece is connected to the connecting column, and the other end of the connecting piece is connected to the first grounding contact seat 303, the second grounding contact seat 303 or the third grounding contact seat 303.

[0065] The middle contact seat 304 is connected to the outlet line 301, and a moving channel is formed inside the middle contact seat along the axial direction. The moving channel is provided with contact fingers, contact sheets or spiral contacts. The moving contact 302 is provided in the moving channel and can slide in the extension direction of the slideway. There are three functional positions of the moving contact 302, namely the first position, the middle position and the second position, and the middle position is located between the first position and the second position; when the moving contact 302 is located in the first position, the middle contact seat 304 is conductively connected to the grounding contact seat 303 through the moving contact 302, and this is the grounding position; when the moving contact 302 is located in the second position, the middle contact seat 304 is conductively connected to the static contact seat 305 through the moving contact 302, and this is the connection position; when the moving contact 302 is located in the middle position, the middle contact seat 304 is in a disconnected state with the grounding contact seat 303 and the static contact seat 305, and this is the isolation position. The moving contact 302 cannot contact the grounding contact seat 303 and the static contact seat 305 at the same time.

[0066] The intermediate contacts 304 of the three-phase isolating and grounding switch 300 are respectively the first intermediate contact 304 , the second intermediate contact 304 and the third intermediate contact 304 , wherein the first intermediate contact 304 , the second intermediate contact 304 and the third intermediate contact 304 are arranged in a triangle around the center line O1 of the fourth port 104 .

[0067] The static contact seat 305 is connected to the corresponding busbar 200, and the connection part of the static contact seat 305 is provided with a contact finger, a contact sheet or a spiral contact. The static contact seats 305 of the three-phase isolating and grounding switch 300 are respectively the first static contact seat 305, the second static contact seat 305 and the third static contact seat 305; the first static contact seat 305, the second static contact seat 305 and the third static contact seat 305 are arranged in a triangle around the center line O1 of the fourth port 104.

[0068] The driving member 400 drives the moving contact 302 to move linearly and move between the first position, the middle position and the second position through the transmission member, so as to realize the switching of the three positions. The driving member 400 is a linear motor or a motor 401. When the driving member 400 is a motor 401, and the motor outputs a rotational motion, the transmission member 500 is a transmission mechanism capable of converting the rotational motion into a linear motion, such as a lead screw nut transmission mechanism. Specifically, the transmission member 500 includes a lead screw 501 and a fixing member 502, wherein one end of the lead screw 501 is transmission-connected to the motor 401, and is fixed to the flange cover 1041 through the fixing member 502, and sequentially passes through the grounding contact seat 303 and the middle contact seat 304 to connect with the moving contact 302, and the moving contact 302 performs a linear motion under the action of the lead screw 501.

[0069] For the convenience of explanation, the transmission members 500 are respectively the first linear transmission member, the second linear transmission member and the third linear transmission member, and the lead screws 501 are respectively the first lead screw, the second lead screw and the third lead screw.

[0070] The first grounding contact seat 303, the first middle contact seat 304 and the first static contact seat 305 of the three-phase isolating grounding switch 300 are coaxially arranged, the second grounding contact seat 303, the second middle contact seat 304 and the second static contact seat 305 are coaxially arranged, and the third grounding contact seat 303, the third middle contact seat 304 and the third static contact seat 305 are coaxially arranged. The second grounding contact seat 303 and the third grounding contact seat 303 are located on the same plane and the plane is parallel to the flange cover 1041. The first grounding contact seat 303, the second grounding contact seat 303 and the third grounding contact seat 303 are distributed in an equilateral triangle relative to the axis of the flange cover 1041. At this time, the triangle formed by the first grounding contact seat 303, the second grounding contact seat 303 and the third grounding contact seat 303 occupies a small space, which is conducive to reducing the volume of the grounding contact seat 303, thereby reducing the size of the tank body 100 corresponding to the position of the grounding contact seat 303.

[0071] In some embodiments of the present invention, the outgoing line 301 of each phase isolating and grounding switch 300 includes a third end 3011, a second middle part 3012 and a fourth end 3013 connected in sequence with arc transitions, the third end 3011 is connected to the corresponding middle contact seat 304, and the fourth end 3013 is connected to the third port 103; the axis of the second middle part 3012 of the outgoing line 301 of the three-phase isolating and grounding switch 300 is located on the third plane γ. Along the extension direction of the second middle part 3012 of the outgoing line 301 of the three-phase isolating and grounding switch 300, the effective occupied area of ​​the second middle part 3012 of the outgoing line 301 of the three-phase isolating and grounding switch 300 is reduced, thereby reducing the effective occupied space of the outgoing line 301 of the three-phase isolating and grounding switch 300, and therefore, the size of the tank body 100 can be designed to be more compact.

[0072] On the basis of some of the above embodiments, the third surface γ is parallel to the fourth surface δ passing through the center line of the three ports, and the fourth surface δ is perpendicular to the center line O1 of the fourth port 104. The distance between the third surface γ and the tank wall of the vertical portion 100c is minimal, thereby further optimizing the arrangement of the outlet line 301 and improving the utilization rate of the internal space of the vertical portion 100c.

[0073] On the basis of some of the above embodiments, with the fourth surface δ as the boundary, the third surface γ is arranged toward the fourth port 104. That is, the second middle portion 3012 of the three-phase outgoing line 301 is closer to the tank wall of the longitudinal portion 100b near the fourth port 104, thereby further improving the utilization rate of the internal space of the longitudinal portion 100b.

[0074] In some embodiments of the present invention, the connection position between the fourth end 3013 of the outgoing line 301 in the three-phase isolating and grounding switch 300 and the third port 103 is arranged in a triangle, which can reduce the diameter of the third port 103 while meeting the wiring requirements. Further, the connection position between the fourth end 3013 of the outgoing line 301 in the three-phase isolating and grounding switch 300 and the third port 103 is arranged in an equilateral triangle, which can further reduce the diameter of the third port 103 while meeting the wiring requirements.

[0075] The following is a detailed introduction to the outlet 301:

[0076] One end of the outgoing line 301 is connected to the third port 103 through the third partition insulator 1031, and the other end of the outgoing line 301 is connected to the middle contact seat 304, and the connection part of the outgoing line 301 and the third partition insulator 1031 is connected by an arc transition. The outgoing lines 301 of the three-phase isolating and grounding switch 300 are the first outgoing line, the second outgoing line and the third outgoing line. The axis of the second middle part 3012 of the first outgoing line, the axis of the second middle part 3012 of the second outgoing line and the axis of the second middle part 3012 of the third outgoing line are all located on the third plane γ.

[0077] It should be noted that by optimizing the size of the integrated busbar and isolating earthing switch device, the integrated busbar and isolating earthing switch device can be applied to the field of 40.5kV medium-voltage pneumatic switch technology. However, the integrated busbar and isolating earthing switch device of the present invention can be applied not only to the field of 40.5kV medium-voltage pneumatic switch technology, but also to the field of pneumatic switch technology of other voltage levels.

[0078] In some embodiments of the present invention, an application device is also disclosed, which uses any of the above-mentioned integrated busbar and isolating grounding switch devices. Since the above-mentioned integrated busbar and isolating grounding switch device has the above effects, the device using the integrated busbar and isolating grounding switch also has corresponding effects, which will not be repeated here.

[0079] It should be noted that, for the convenience of description, only the parts related to the present invention of the related application are shown in the drawings. In the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other.

[0080] It should be understood that the "system", "device", "unit" and / or "module" used in this application is a method for distinguishing different components, elements, parts, portions or assemblies at different levels. However, if other words can achieve the same purpose, the word can be replaced by other expressions.

[0081] As shown in this application and claims, unless the context clearly indicates an exception, the words "a", "an", "a kind" and / or "the" do not refer to the singular, but also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of clearly identified steps and elements, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements. The elements defined by the sentence "includes a..." do not exclude the existence of other identical elements in the process, method, commodity or device that includes the elements.

[0082] In the description of the embodiments of the present application, unless otherwise specified, " / " means or, for example, A / B can mean A or B; "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, "multiple" means two or more than two.

[0083] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0084] Flowcharts are used in the present application to illustrate the operations performed by the system according to the embodiments of the present application. It should be understood that the preceding or following operations are not necessarily performed accurately in order. On the contrary, the various steps may be processed in reverse order or simultaneously. At the same time, other operations may also be added to these processes, or one or more operations may be removed from these processes.

[0085] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A device integrating a busbar and an isolating grounding switch, characterized in that: It comprises a tank body with a cylindrical pressure-bearing structure, a busbar and an isolating grounding switch, wherein the busbar and the isolating grounding switch are arranged in the tank body; the tank body is provided with four ports, at least three of the four ports are perpendicular to each other, the busbar penetrates and connects the first port and the second port of the four ports, the outlet line of the isolating grounding switch is arranged at the third port of the four ports, and the grounding contact seat of the isolating grounding switch is fixedly arranged at the fourth port of the four ports; The isolating grounding switch is a three-phase isolating grounding switch, and each phase of the isolating grounding switch includes a grounding contact seat, an intermediate contact seat, a static contact seat and a moving contact. One end of the static contact seat is electrically connected to and supported by the corresponding busbar, and the moving contact is driven and connected to the driving member through a transmission member. The driving member is arranged on the fourth port, and the outlet line is connected to the intermediate contact seat and is connected to the third port through a third partition insulator; the grounding contact seat, the intermediate contact seat, the static contact seat and the moving contact are coaxially arranged; the three-phase isolating grounding switches are arranged in a triangle around the center line of the fourth port; the transmission member is a screw nut transmission mechanism.

2. The device of integrated busbar and isolating grounding switch according to claim 1, characterized in that: The tank body includes a longitudinal portion, a transverse portion and a vertical portion which are vertically connected in pairs, the first port and the second port are arranged at two ends of the transverse portion, the third port is arranged at the vertical portion, and the fourth port is arranged at the longitudinal portion.

3. The device of integrated busbar and isolating grounding switch according to claim 1, characterized in that: The busbar is a three-phase busbar, and each phase of the busbar comprises a first end, a first middle portion, and a second end connected in sequence by arc transition, the first end portion is connected to the first port via a first partition insulator, and the second end portion is connected to the second port via a second partition insulator; and the axes of the first middle portions of the three-phase busbars are all located on the first surface; the first surface is parallel to the second surface passing through the center line of the first port, the second surface is perpendicular to the center line of the fourth port, and the center line of the second port is located on the second surface; With the second surface as the boundary, the first surface is arranged in a direction away from the fourth port; the first ends of the three-phase busbars are arranged in a triangle at the connection position of the first port; the second ends of the three-phase busbars are arranged in a triangle at the connection position of the second port.

4. The device of integrated busbar and isolating grounding switch according to claim 3, characterized in that: The first spacer insulator and the second spacer insulator are pot-type insulators.

5. The device of integrated busbar and isolating grounding switch according to claim 4, characterized in that: One end of the busbar is slidably connected to the shielding cover on the insert on the concave surface of the second partition insulator through the first transition conductor, and the other end of the busbar is fixed on the insert on the convex surface of the first partition insulator.

6. The device of integrated busbar and isolating grounding switch according to claim 1, characterized in that: The outgoing line of the isolating and earthing switch of each phase comprises a third end, a second middle part and a fourth end connected in arc transition sequence, the third end is connected to the corresponding middle contact seat, and the fourth end is connected to the third port; the axes of the second middle parts of the outgoing lines of the three-phase isolating and earthing switches are all located on the third plane; the third plane is parallel to the fourth plane passing through the center line of the three ports, and the fourth plane is perpendicular to the center line of the fourth port; with the fourth plane as the boundary, the third plane is arranged in the direction close to the fourth port.

7. The device of integrated busbar and isolating grounding switch according to claim 6, characterized in that: The connection positions of the fourth ends of the outgoing lines in the three-phase isolating and grounding switches and the third ports are arranged in a triangle.

8. The device of integrated busbar and isolating grounding switch according to claim 7, characterized in that: The triangle is an equilateral triangle.

9. An application device, characterized in that: The application equipment uses the device of integrated busbar and isolating earthing switch according to any one of claims 1 to 8.

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