CN211295963U

CN211295963U - Disconnecting link mechanism and 10kV small-sized normal-pressure sealed air insulation switch cabinet comprising same

Info

Publication number: CN211295963U
Application number: CN202020038604.6U
Authority: CN
Inventors: 王海胜; 赵乐; 石振夏
Original assignee: Jincheng Xiang Xiang Science And Technology Electric Appliance Co ltd
Current assignee: Jincheng Xiang Xiang Science And Technology Electric Appliance Co ltd
Priority date: 2020-01-09
Filing date: 2020-01-09
Publication date: 2020-08-18
Anticipated expiration: 2030-01-09

Abstract

The utility model discloses a switch mechanism and contain its small-size ordinary pressure sealed air-insulated cubical switchboard of 10kV, switch mechanism includes inner cam, outer cam, sincere son, flat spring, hollow shaft, connecting rod and moves the sword, the coaxial suit of inner cam and outer cam is on the hollow shaft, the inner cam is connected with hollow shaft transmission, and the inner cam periphery rotates around the sincere son restriction inner cam of several, install flat spring between outer cam and the hollow shaft, outer cam can rotate around the hollow shaft and make the spring energy storage, and outer cam can rotate and dial out sincere son behind the certain angle, makes flat spring release energy storage drive hollow shaft and inner cam rotate, the hollow shaft passes through the connecting rod and moves sword fixed connection, and the hollow shaft rotates and can change and move the sword position, realizes separating brake, combined floodgate and ground connection. The utility model discloses effectively reduced mechanism thickness, compared current sulfur hexafluoride cubical switchboard, the utility model has the advantages of material cost reduction, simple to operate are swift, modularization, longe-lived.

Description

Disconnecting link mechanism and 10kV small-sized normal-pressure sealed air insulation switch cabinet comprising same

Technical Field

The utility model relates to an electrical equipment field especially relates to a switch mechanism and contain its small-size ordinary pressure sealed air insulated switchgear of 10 kV.

Background

Since the establishment of new China, the first generation of electric equipment switch cabinets adopts the drawing of the former Soviet Union, and has the advantages of extremely large volume, 2960mm high, 1200mm wide and 1200mm deep, and the occupied area is about 4.3m³。

In the later period of decades, along with the gradual improvement of domestic electric technology, the height is 2300mm, the width is 800mm, the depth is 1500mm, and the occupied area is about 2.76m³。

The improvement is opened, along with the development of urbanization, the city is changed from overhead lines into underground cables comprehensively, the power supply cable path is mainly in the street trench of the city, the position of a pedestrian passageway needs to be occupied as a controlled switch cabinet, and the size of the switch cabinet which also adopts equipment with large occupied area as a switching-on/off protection cable and power utilization equipment is particularly important to be reduced.

One sulfur hexafluoride (SF) introduced into China in the eighties₆) The insulating gas switch cabinet has the height of 1950mm, the width of 420mm and the depth of 750mm, and the occupied area is about 0.62M 3. The sulfur hexafluoride (SF6) gas insulation switch cabinet is a switch device most suitable for city development due to small volume, has the advantages of good insulation and small volume, and is used up to now. The contracting mode of the '2015 United nations climate Change frame convention' reaches a new climate agreement. China (Paris agreement) submits an independent decision contribution book describing 2030 emission reduction target, and the state requires power companies to supply CO₂And SF₆The emission control of (1). SF₆The gas discharged after the arc-extinguishing short-circuit fault occurs can cause harm to the air, personnel can not go to the site for maintenance within 8 hours of the accident site, and the more harm is SF₆Once diffused into the atmosphere, the gas can survive for 3200 years, and the existence of the gas in the air causes great harm to human beings. How to replace sulfur hexafluoride (SF) by a switch cabinet which has small volume, does not influence environmental pollution, is qualified in insulation and has electrical performance meeting electrical standard₆) Opening deviceShutting down the cabinet is a current critical task.

Therefore, domestic manufacturers have introduced solid insulated switch cabinets with a height of 1700mm, a width of 420mm, a depth of 900mm and a floor space of about 0.64m³The solid insulation covers the charged body part with epoxy resin to achieve the purpose of small volume, the current-carrying capacity is influenced after the charged body is covered, the epoxy resin has air gaps in the manufacturing process, the problem of partial discharge accumulation frequently occurs in the charged operation process to cause short-circuit accidents, the solid insulation has poor heat dissipation and the problem that partial discharge cannot be solved, and the manufacturer develops an environment-friendly gas insulation switch cabinet with the height of 2000mm, the width of 420mm and the depth of 950mm, the occupied area is about 0.8m³However, at present, whether the environmental protection gas can reach sulfur hexafluoride (SF)₆) The arc extinguishing effect of (2) is to be further confirmed.

Therefore, it is obvious that the conventional 10kV small-sized switch cabinet still has inconvenience and defects in structure, method and use, and further improvement is urgently needed. How to create a new 10kV small-sized switch cabinet belongs to one of the current important research and development subjects.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a switch mechanism makes it save the shared space of extension spring and gear, and the volume is littleer to overcome current switch mechanism not enough.

For solving the technical problem, the utility model provides a switch mechanism, include inner cam, outer cam, sincere son, flat spring, hollow shaft, connecting rod and move the sword, the coaxial suit of inner cam and outer cam is on the hollow shaft, inner cam is connected with the hollow shaft transmission, and inner cam periphery rotates around the sincere son restriction inner cam of several, install flat spring between outer cam and the hollow shaft, outer cam can rotate around the hollow shaft and make flat spring energy storage, and outer cam can rotate and dial out sincere son behind the certain angle, makes flat spring release energy storage drive hollow shaft and inner cam rotate, the hollow shaft passes through the connecting rod and moves sword fixed connection, and the hollow shaft rotates and can change and move the sword position, realizes separating brake, combined floodgate and ground connection.

As the utility model discloses an improvement, the quantity of sincere son is four, is the sincere son of first sincere son, second, the sincere son of third and the sincere son of fourth respectively, the sincere son of first sincere son and the sincere son symmetrical arrangement of second are located the inner cam top left and right sides, the inner cam bottom left side can be blocked in the closing position to first sincere son, the sincere son of second can block inner cam bottom right side in ground connection position, the sincere son of third and the sincere son symmetrical arrangement of fourth are located the below left and right sides of inner cam, the sincere son of third and the sincere son of fourth can block inner cam bottom both sides in the separating brake position.

The protruding portions of the inner cam and the protruding portions of the outer cam are arranged in a staggered mode, so that when the outer cam is rotated, the protruding portions of the outer cam can be used for poking and clamping the sinceres of the inner cam, and the sinceres can be simultaneously contacted with the inner cam and the outer cam in the thickness direction.

The hollow shaft is kept away from the one end fixedly connected with shaft coupling of outer cam, flat spring arranges in the hollow shaft, and outer cam is connected to one end, and the shaft coupling is connected to the other end.

The coupler and the outer cam are respectively provided with a square hole with the width matched with that of the flat spring, one end of the flat spring is embedded into the square hole on the outer cam, and the other end of the flat spring is embedded into the square hole on the coupler.

The sincere son is provided with sincere son axle, four sincere son axle erects between two backup pads, and four sincere son suit are epaxial at the sincere son, and simultaneously, outer cam and inner cam are also installed between two backup pads, it has the hole to supply the hollow shaft to pass to open in the backup pad, and two parallel arrangement's backup pad provides the support for the installation of sincere son, also installs outer cam, inner cam and sincere son integration together simultaneously.

The thickness of an operating mechanism used for controlling switching-on, switching-off and grounding in the disconnecting link mechanism is not more than 100mm, the operating mechanism comprises an inner cam, an outer cam and four sinceres, and the thickness of the operating mechanism is the maximum distance of the inner cam, the outer cam and the four sinceres after the inner cam, the outer cam and the four sinceres are overlapped in the axial direction.

Furthermore, the utility model provides a small-size ordinary pressure sealed air insulation switch cabinet of 10kV makes it reduce the volume as far as possible under the prerequisite of the air insulation distance between guaranteeing looks and phase, looks ground to overcome the not enough of current small-size switch cabinet of 10 kV.

In order to solve the technical problem, the utility model provides a small-size ordinary pressure sealed air insulation switch cabinet of 10kV, include switch mechanism.

The switch cabinet further comprises a three-phase busbar, the three-phase busbar is arranged above the movable knife in parallel, and the phase distance of the three-phase busbar is larger than or equal to 125mm so as to meet the requirement of air insulation standard distance.

The overall dimension of the switch cabinet is 1990mm in height, 450mm in width and 772mm in depth, and the occupied space is 0.69m³

After adopting such design, the utility model discloses following advantage has at least:

1. the utility model discloses an utilize flat spring and sincere son action precedence and relation to let flat spring strip reach sincere son after the certain degree and dial completion combined floodgate, divide absolutely and ground connection, saved the thickness position that traditional extension spring and gear occupied, effectual reduction mechanism thickness.

2. The utility model discloses use the air to insulate, guaranteeing under the prerequisite that phase and phase, phase and ground between the distance satisfies the air insulation distance, minimize cabinet body volume has replaced original sulfur hexafluoride (SF)₆) Insulating switch cabinet, completely eliminating sulfur hexafluoride (SF)₆) The gas leakage is not harmful, and no large amount of epoxy resin solid waste is generated. The insulating material in the whole cabinet adopts SMC, PA6 and other environment-friendly materials, the utilization rate of epoxy resin is reduced to below 80%, and the environment-friendly, low-carbon and energy-saving effects are achieved really.

3. Because the utility model adopts the normal pressure sealing and the internal medium of the cabinet is air, compared with sulfur hexafluoride (SF)₆) The gas charging cabinet must adopt stainless steel as the material of the plenum chamber, and the utility model discloses more have economical in material cost.

4. The utility model discloses the vacuum interrupter of major loop, isolation sword, female inseparable linking together of arranging have realized shortest conductive loop length, the minimum conductive loop tie point.

5. Obvious isolating switch fractures can be seen outside the cabinet, and the phase adopt an isolating design, so that the occurrence of electrical short circuit faults is effectively avoided.

6. The novel normal-pressure air insulation sealed box body, the vacuum arc extinguishing chamber assembly, the three-station isolating/grounding switch, the horizontal bus arrangement, the incoming bus bar and other main conductors are all arranged in the sealed box body.

7. The mass production can realize modular assembly.

8. The field maintenance can be performed without power outage.

9. Compared with sulfur hexafluoride (SF)₆) Aerify cabinet, the utility model discloses install convenient and fast more, life is longer.

Drawings

The foregoing is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clear, the present invention will be further described in detail with reference to the accompanying drawings and the detailed description.

Fig. 1 is the utility model provides a knife-switch mechanism's among the small-size ordinary pressure sealed air insulated switchgear of 10kV front view.

Fig. 2 is the utility model provides a three-dimensional view of knife switch mechanism in the small-size ordinary pressure sealed air insulated switchgear of 10 kV.

Fig. 3a is the utility model provides a front view of the small-size ordinary pressure sealed air insulation cubical switchboard of 10 kV.

Fig. 3b is a side view of the small-sized normal pressure sealed air insulated switchgear of 10kV provided by the present invention.

Fig. 4 is the utility model provides a side cross-sectional view of the small-size ordinary pressure sealed air insulated switchgear of 10 kV.

Fig. 5a-5b are schematic diagrams of the action process of the switching-on and switching-off of the knife-switch mechanism from the switching-off state.

Fig. 6a-6b are schematic diagrams of the action process of the knife switch mechanism switching from closing to opening.

Fig. 7a-7b are schematic diagrams of the operation process of the disconnecting link mechanism from disconnecting link to grounding link.

Fig. 8a-8b are schematic views illustrating the operation of the disconnecting link mechanism for switching from the ground to the disconnecting link.

Description of reference numerals: 1-a first core; 2-second sincere; 3-the third sincere; 4-the fourth sincere; 5-an outer cam; 6-inner cam; 7-moving the knife; 8-connecting rod; 9-an operating mechanism; 10-a hollow shaft; 11-flat spring; 12-a coupling; 13-three-phase wiring copper column.

Detailed Description

Referring to fig. 1 and 2, the present invention provides a 10kV small-sized normal pressure sealed air-insulated switchgear, which comprises a disconnecting link mechanism, wherein the disconnecting link mechanism comprises an inner cam 6, an outer cam 5, a pawl, a flat spring 11, a hollow shaft 10, a connecting rod 8 and a moving blade 7.

The inner cam 6 and the outer cam 5 are coaxially and parallelly arranged, central holes are formed in the central positions of the inner cam 6 and the outer cam 5 respectively, and the hollow shaft 10 penetrates through the central holes of the inner cam 6 and the outer cam 5 and is coaxially arranged with the inner cam 6 and the outer cam 5. The inner cam 6 is in transmission connection with the hollow shaft 10, and when the hollow shaft 10 rotates, the inner cam 6 can be driven to rotate together. The outer cam 5 is movably sleeved on the hollow shaft 10 and can rotate around the hollow shaft 10, and a flat spring 11 is arranged between the outer cam 5 and the hollow shaft 10.

Preferably, a coupler 12 is arranged at one end of the hollow shaft 10 far away from the outer cam 5, the flat spring 11 is installed in the hollow shaft 10, square holes corresponding to the width of the flat spring 11 are respectively formed in the coupler 12 and the outer cam 5, one end of the flat spring 11 is embedded into the square hole in the outer cam 5, the other end of the flat spring 11 is embedded into the square hole in the coupler 12, and the flat spring 11 is connected between the outer cam 5 and the coupler 12. When the outer cam 5 rotates, the flat spring 11 can store energy; when the flat spring 11 releases the stored energy, the coupling 12 can be driven, so that the hollow shaft 10 is driven to rotate.

Four sincere son are provided with around the inner cam 6, are first sincere son 1, the sincere son 2 of second, the sincere son 3 of third and the sincere son 4 of fourth respectively, first sincere son 1 and the sincere son 2 of second are symmetrically arranged in the left and right sides of inner cam 6 top, the left and right sides of cam 6 below is arranged in the sincere son 3 of third and the sincere son 4 of fourth symmetry, and the effect of four sincere sons is the rotation of restriction inner cam 6, realizes the function that moves 7 positions of sword keep. Each latch is provided with a latch shaft, the latches can rotate around the latch shafts to complete the swinging motion of the latches, and the latches can be simultaneously contacted with the inner cam 6 and the outer cam 5 in the thickness direction, so that when the outer cam 5 rotates, the protruding part of the outer cam 5 is contacted with the latches to toggle the latches. The inner cam 6 rotates with the outer cam 5 by a certain angle, and the inner cam 6 can be clamped again by the aid of the spring. Four sincere son axles are erect between two backup pads, and four sincere son suit are epaxial at sincere son, and simultaneously, outer cam and inner wheel are also installed between two backup pads, still open the hole in the backup pad and supply the hollow shaft to pass, and two parallel arrangement's backup pad not only provides the support for the installation of sincere son, also installs outer cam, inner cam and sincere son integration together simultaneously. The four catches mounted between the two plates, as well as the external cam and the internal cam, are collectively referred to as the operating mechanism 9.

Specifically, when the movable blade 7 is in the opening position, the third detent 3 and the fourth detent 4 catch the inner cam 6 from below to keep the movable blade 7 in the opening position; when the movable knife 7 is at the switch-on position, the inner cam 6 is clamped by the first latch 1 at the upper left side so as to keep the movable knife 7 at the switch-on position; when the movable knife 7 is in the grounding position, the second latch 2 catches the inner cam 6 at the upper right side so as to keep the movable knife 7 in the grounding position.

Preferably, the convex parts of the outer cam 5 and the convex parts of the inner cam 6 are arranged in a staggered manner, so that after the outer cam 5 rotates for a certain angle, the latch can be pulled to enable the inner cam 6 to rotate along with the rotation.

The connecting rod 8 is installed between the hollow shaft 10 and the movable knife 7, the connecting rod 8 and the hollow shaft 10 are in transmission connection, in the embodiment, a plurality of protrusions are arranged on the periphery of the hollow shaft 10, the connecting rod 8 is sleeved outside the hollow shaft 10 and provided with grooves matched with the protrusions on the periphery of the hollow shaft 10, the hollow shaft 10 rotates to drive the connecting rod 8 to rotate, and the connecting rod 8 drives the movable knife 7 to move. When the movable knife 7 is in a completely vertical position, the movable knife is communicated with an upper three-phase busbar contact and is in a closing state; the moving knife 7 is in a brake-off state when in an upward inclined position; when the movable knife 7 is in the downward inclined position, the movable knife is connected with the grounding contact at the lower part, and is in a grounding state.

The lowest end of the movable cutter 7 is connected with a three-phase wiring copper column 13, and the three-phase wiring copper column 13 is wrapped by epoxy resin to meet the insulation requirement.

Referring to fig. 3a and 3b, the size of the 10kV small-sized normal pressure sealed air-insulated switch cabinet provided by the present invention is 1990mm high, 450mm wide, 772mm deep, and 0.69m of occupied space³。

Preferably, the cabinet body is sealed in a normal-pressure sealing mode, and the internal pressure and the external pressure of the cabinet are consistent.

Referring to fig. 4, the utility model provides a small-size ordinary pressure sealed air insulated switchgear of 10kV is in 772mm thick size, guarantees earlier that the female inter-phase distance that arranges of three-phase is more than or equal to 125mm in order to satisfy the requirement of air insulation standard distance, and then is used for holding the switch mechanism with the planning design of remaining space, the operating device 9's that is used for controlling combined floodgate, separating brake and ground connection among the switch mechanism thickness portion is no more than 100 mm.

The utility model discloses realize that the work flow of combined floodgate, separating brake and ground connection as follows:

1. switching on or off by switching off

Referring to fig. 5a and 5b, in the open state, the outer cam 5 is rotated clockwise, the protruding portion of the outer cam 5 rotates a certain angle and then pulls the fourth detent 4, and at this time, the flat spring 11 is twisted by 65 degrees, so as to reach the energy storage state. Along with the stirring and lifting of the fourth pawl 4, the inner cam 6 is no longer limited by the fourth pawl 4, the flat spring 11 releases stored energy and drives the hollow shaft 10 to rotate through the coupler 12, the hollow shaft 10 drives the connecting rod 8 to rotate the movable knife 7 to a completely vertical position, and at the moment, the movable knife 7 is in contact with a three-phase busbar contact positioned right above, so that a switching-on function is realized. When the movable knife 7 is in the completely vertical position, the stored energy of the flat spring 11 is completely released, and meanwhile, the first pawl 1 clamps the inner cam 6 again, so that the movable knife 7 is kept in the switch-on position.

2. Switching from closed to open

Referring to fig. 6a and 6b, in a closing state, the outer cam 5 is rotated counterclockwise, so as to drive the flat spring 11 to rotate by 65 degrees to reach an energy storage state, the protruding portion of the outer cam 5 toggles the first pawl 1, the inner cam 6 loses the limit, the flat spring 11 releases the stored energy and drives the hollow shaft 10 to rotate through the coupler 12, the hollow shaft 10 drives the connecting rod 8 to rotate the movable knife 7 to reach a opening position, after the stored energy of the flat spring 11 is released, the inner cam 6 resets, the inner cam 6 is clamped by the third pawl 3 and the fourth pawl 4 again, and the movable knife 7 is kept in the opening state.

3. Is switched to ground by the brake-separating

Referring to fig. 7a and 7b, in the opening state, the outer cam 5 is rotated counterclockwise, so as to drive the flat spring 11 to rotate 65 degrees to reach the energy storage state, the protruding portion of the outer cam 5 pulls the third latch 3, the inner cam 6 loses the limit, the flat spring 11 releases the stored energy and drives the hollow shaft 10 to rotate through the coupler 12. The hollow shaft 10 drives the connecting rod 8 to rotate the movable knife 7 to the grounding contact position, and the second latch 2 clamps the right side of the inner cam 6 again to keep the movable knife 7 at the grounding position.

4. Switching off from ground

Referring to fig. 8a and 8b, in the grounding state, the outer cam 5 is rotated clockwise, the convex part of the outer cam 5 rotates a certain angle and then stirs the second latch 2, and at this time, the flat spring 11 is twisted and deformed by 65 degrees and reaches the energy storage state. Along with the second sincere son 2 is stirred by the outer cam 5 and is completely lifted up, the inner cam 6 loses the spacing, the flat spring 11 releases the stored energy and drives the hollow shaft 10 to rotate through the coupler 12, the hollow shaft 10 drives the connecting rod 8 to rotate the movable knife 7 to the opening position, after the stored energy of the flat spring 11 is released, the inner cam 6 resets, the inner cam 6 is clamped by the third sincere son 3 and the fourth sincere son 4 again, and the movable knife 7 is kept in the opening state.

The above description is only for the preferred embodiment of the present invention, and not intended to limit the present invention in any way, and those skilled in the art can make various modifications, equivalent changes and modifications using the above-described technical content, all of which fall within the scope of the present invention.

Claims

1. The utility model provides a knife switch mechanism, its characterized in that includes inner cam, outer cam, sincere son, flat spring, hollow shaft, connecting rod and moves the sword, the coaxial suit of inner cam and outer cam is on the hollow shaft, inner cam is connected with the hollow shaft transmission, and inner cam periphery is around the sincere son restriction inner cam rotation of several, install flat spring between outer cam and the hollow shaft, outer cam can rotate around the hollow shaft and make flat spring energy storage, and outer cam can rotate and dial out sincere son behind the certain angle, makes flat spring release energy storage drive hollow shaft and inner cam rotate, the hollow shaft passes through the connecting rod and moves sword fixed connection, and the hollow shaft rotates and can change and move the sword position, realizes separating brake, combined floodgate and ground connection.

2. The disconnecting link mechanism according to claim 1, wherein the number of the latches is four, and the first latch, the second latch, the third latch and the fourth latch are respectively provided, the first latch and the second latch are symmetrically arranged and located on the left and right sides above the inner cam, the first latch can clamp the left side of the bottom of the inner cam at a closing position, the second latch can clamp the right side of the bottom of the inner cam at a grounding position, the third latch and the fourth latch are symmetrically arranged and located on the left and right sides below the inner cam, and the third latch and the fourth latch can clamp the two sides of the bottom of the inner cam at a opening position.

3. The disconnecting link mechanism according to claim 1, wherein the projections of the inner cam and the projections of the outer cam are arranged alternately, so that when the outer cam is rotated, the projections of the outer cam can be pulled apart from the catches that catch the inner cam, and the catches can be simultaneously brought into contact with the inner cam and the outer cam in the thickness direction.

4. The disconnecting link mechanism according to claim 1, wherein a coupling is fixedly connected to an end of the hollow shaft remote from the outer cam, the flat spring is disposed in the hollow shaft, one end is connected to the outer cam, and the other end is connected to the coupling.

5. The disconnecting link mechanism according to claim 4, wherein the coupling and the outer cam are each formed with a square hole corresponding to the width of the flat spring, one end of the flat spring is inserted into the square hole of the outer cam, and the other end of the flat spring is inserted into the square hole of the coupling.

6. The disconnecting link mechanism according to claim 1, wherein the latch is provided with latch shafts, four of the latch shafts are erected between two support plates, the four latches are sleeved on the latch shafts, the outer cam and the inner cam are also installed between the two support plates, holes are formed in the support plates for the hollow shaft to pass through, the two support plates arranged in parallel provide support for the installation of the latch, and the outer cam, the inner cam and the latch are also integrally installed together.

7. The knife-switch mechanism according to claim 1, characterized in that the thickness of the operating mechanism for controlling the closing, opening and grounding in the knife-switch mechanism is not more than 100mm, the operating mechanism comprises an inner cam, an outer cam and four detents, and the thickness of the operating mechanism is the maximum distance after the inner cam, the outer cam and the four detents are overlapped in the axial direction.

8. A10 kV small-sized atmospheric-pressure sealed air-insulated switchgear, characterized by comprising the disconnecting link mechanism of any one of claims 1 to 6.

9. The 10kV small-sized atmospheric-pressure sealed air-insulated switchgear according to claim 8, further comprising a three-phase busbar, wherein the three-phase busbar is arranged above the moving blade in parallel, and the phase distance between the three-phase busbar is larger than or equal to 125mm so as to meet the standard distance requirement of air insulation.

10. The 10kV small-sized atmospheric pressure sealed air-insulated switchgear cabinet according to claim 8, wherein the overall dimensions of the switchgear cabinet are 1990mm high, 450mm wide and 772mm deep, and the occupied space is 0.69m³。