CN108807063B - Switch cabinet and three-phase grounding switch thereof - Google Patents
Switch cabinet and three-phase grounding switch thereof Download PDFInfo
- Publication number
- CN108807063B CN108807063B CN201810557385.XA CN201810557385A CN108807063B CN 108807063 B CN108807063 B CN 108807063B CN 201810557385 A CN201810557385 A CN 201810557385A CN 108807063 B CN108807063 B CN 108807063B
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- main shaft
- contact
- transmission main
- phase
- switch
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- 230000005540 biological transmission Effects 0.000 claims abstract description 55
- 230000003068 static effect Effects 0.000 abstract description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 6
- 229910052802 copper Inorganic materials 0.000 description 6
- 239000010949 copper Substances 0.000 description 6
- 238000005457 optimization Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
- H01H31/26—Air-break switches for high tension without arc-extinguishing or arc-preventing means with movable contact that remains electrically connected to one line in open position of switch
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
- H01H31/02—Details
- H01H31/04—Interlocking mechanisms
- H01H31/08—Interlocking mechanisms for interlocking two or more parts of the mechanism for operating contacts
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/30—Cabinet-type casings; Parts thereof or accessories therefor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
- H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
- H02B13/035—Gas-insulated switchgear
- H02B13/075—Earthing arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The utility model provides a switch cabinet and a three-phase grounding switch thereof, and relates to the technical field of high-voltage electrical equipment. The switch cabinet comprises a cabinet body, a three-phase grounding switch and a three-phase static contact are arranged in the cabinet body, the three-phase grounding switch comprises a base fixedly arranged with the cabinet body, a transmission main shaft is rotatably assembled on the base, a connecting arm is vertically connected to the transmission main shaft, an integrated moving contact with the length extending along the axis of the transmission main shaft is arranged at the outer end of the connecting arm, and the moving contact is simultaneously separated from and contacted with the three-phase static contact when driven to rotate by the transmission main shaft, so that opening and closing are realized. When the three-phase static contact is used, the operating mechanism drives the transmission main shaft to rotate, and the transmission main shaft drives the moving contact to conduct switching-on and switching-off actions.
Description
Technical Field
The utility model relates to the technical field of high-voltage electrical equipment, in particular to a switch cabinet and a three-phase grounding switch thereof.
Background
In high voltage circuits, the switchgear is an important control and shunt part of the overall circuit. When the switch cabinet works normally, the switch cabinet is electrified equipment, and when the switch cabinet needs to be overhauled, the switch cabinet needs to be grounded to avoid the electric shock danger of overhaulers, and the element for controlling whether the switch cabinet is grounded is a grounding switch. The function of the grounding switch is: 1. the grounding switch is arranged on the power supply side or the output load side of the switch cabinet to prevent abrupt incoming call in the overhaul process, the grounding switch can guide the output load into underground protection overhauling personnel, and residual charges are discharged completely, so that discharge danger caused by charge aggregation is avoided.
The prior art of the grounding switch is as disclosed in the Chinese patent application publication No. CN202772494U, and the rotary grounding switch for the gas-insulated switchgear comprises a bracket, a main shaft, a shaft sleeve, a crank arm, a grounding blade, a short copper bar, a grounding contact seat and an aluminum sleeve which are arranged in the bracket. The main shaft is the integral key shaft, has a plurality of high strength metal material's turning arms through the spline cover, and every two turning arms set up to a set of, and earthing knife-blade and short circuit copper bar both ends pass through screw and nut and install between every two turning arms of group, and the main shaft passes through the axle sleeve at both ends and installs in the support and can rotate on the support, and main shaft one end stretches out and is used for connecting operating device, and the ground contact seat is installed in main loop conductor, and the quick rotation of drive main shaft is moved through operating device and is made earthing knife-blade insert ground contact seat accomplish the ground connection of main loop conductor.
However, the grounding switch in the prior art has a complex structure, more parts and complex assembly process. Moreover, in actual processing, the centering of the fixed hole site cannot be ensured, and the positions of the three grounding blades fixed by the screws may deviate, so that when in use, part of the grounding blades are in a complete closing position, other grounding blades do not form good contact with the grounding contact seat, the movement synchronism of the grounding blades at each part is poor, the grounding is unreliable, and the potential shock hazard of operators cannot be completely eliminated.
Disclosure of Invention
The utility model aims to provide a three-phase grounding switch, which is used for solving the problems that the moving synchronism of a movable contact is poor, the grounding is unreliable and the hidden danger of electric shock of an operator cannot be completely eliminated. The utility model aims to provide a switch cabinet which is used for solving the problems that the moving synchronism of a movable contact is poor, the grounding is unreliable and the hidden danger of electric shock of an operator cannot be completely eliminated.
In order to achieve the above purpose, the technical scheme of the three-phase grounding switch of the utility model is as follows:
the three-phase grounding switch comprises a base, a transmission main shaft is rotatably assembled on the base, a connecting arm is vertically connected to the transmission main shaft, and an integrated moving contact with the length extending along the axis of the transmission main shaft and capable of being driven by the transmission main shaft to rotate and simultaneously separating from and contacting with the three-phase fixed contact is arranged at the outer end of the connecting arm.
The beneficial effects are that: when the electric switch is in use, the operating mechanism is in transmission connection with the transmission main shaft, and when the grounding is needed or disconnected, the operating mechanism drives the transmission main shaft to rotate, and the transmission main shaft drives the moving contact to conduct switching-on and switching-off actions.
In order to simplify the structure and reduce the assembly difficulty, the movable contact is further limited, the movable contact is of a strip plate-shaped structure, and the plate surface of the movable contact is perpendicular to the length extending direction of the connecting arm.
In order to ensure that interference does not occur between the connecting arms and the fixed contacts, the setting positions of the connecting arms are further limited, two connecting arms are arranged at intervals in the axial direction of the transmission main shaft, and the two connecting arms divide the moving contact into three contact parts which respectively correspond to the three-phase fixed contacts.
In order to improve the conductive reliability of the movable contact, a corresponding structure is added between the connecting arm and the movable contact, gaskets are fixedly arranged at the outer ends of the connecting arm, the plane where the gaskets are located is perpendicular to the length extending direction of the connecting arm, and the gaskets are attached and fastened with the movable contact.
In order to achieve the above purpose, the technical scheme of the switch cabinet of the utility model is as follows:
the switch cabinet comprises a cabinet body, a three-phase grounding switch is arranged in the cabinet body, the three-phase grounding switch comprises a base fixedly arranged with the cabinet body, a transmission main shaft is rotatably assembled on the base, a connecting arm is vertically connected to the transmission main shaft, an integrated moving contact with the length extending along the axis of the transmission main shaft is arranged at the outer end of the connecting arm, and the moving contact is separated from and contacted with a three-phase fixed contact in the cabinet body when driven to rotate by the transmission main shaft, so that opening and closing are realized.
The beneficial effects are that: when the electric switch is in use, the operating mechanism is in transmission connection with the transmission main shaft, and when the grounding is needed or disconnected, the operating mechanism drives the transmission main shaft to rotate, and the transmission main shaft drives the moving contact to conduct switching-on and switching-off actions.
In order to simplify the structure and reduce the assembly difficulty, the movable contact is further limited, the movable contact is of a strip plate-shaped structure, and the plate surface of the movable contact is perpendicular to the length extending direction of the connecting arm.
In order to ensure that interference does not occur between the connecting arms and the fixed contacts, the setting positions of the connecting arms are further limited, two connecting arms are arranged at intervals in the axial direction of the transmission main shaft, and the two connecting arms divide the moving contact into three contact parts which respectively correspond to the three-phase fixed contacts.
In order to improve the conductive reliability of the movable contact, a corresponding structure is added between the connecting arm and the movable contact, gaskets are fixedly arranged at the outer ends of the connecting arm, the plane where the gaskets are located is perpendicular to the length extending direction of the connecting arm, and the gaskets are attached and fastened with the movable contact.
In order to realize stable grounding of the three-phase grounding switch, the structure of the three-phase static contact is further limited, and the three-phase static contact is provided with a grounding clamp which is in clamping fit with a corresponding contact part of the moving contact.
Drawings
Fig. 1 is a schematic front view of a moving contact part of a three-phase grounding switch in the utility model during closing;
FIG. 2 is a right side schematic view of FIG. 1;
FIG. 3 is a schematic top view of the moving contact portion of the three-phase grounding switch of the present utility model when the switch is opened;
FIG. 4 is a left side schematic view of FIG. 3;
FIG. 5 is a right side view of the three-phase grounding switch of the present utility model when closed in an application;
in the figure: 1-base, 2-transmission main shaft, 3-linking arm, 4-movable contact, 5-gasket, 6-bolt, 7-ground clamp, 8-transfer line, 10-cabinet body.
Detailed Description
Embodiments of the present utility model will be further described with reference to the accompanying drawings.
In the embodiment 1 of the switch cabinet of the utility model, the switch cabinet comprises three-phase grounding switches, as shown in fig. 1 to 4, and further comprises three-phase fixed contacts which are arranged on the inner wall surface of the cabinet body 10 in parallel and at equal intervals, and the operating mechanism realizes the opening and closing actions of the three-phase grounding switches by driving the transmission main shaft 2, as shown in fig. 5, wherein the transmission rod 8 moves downwards to drive the transmission crank arm to rotate anticlockwise and drive the transmission main shaft 2 to rotate synchronously, so that the closing action of the movable contact 4 is realized, and conversely, the opening and closing actions are realized.
The three-phase grounding switch comprises a base 1 and a transmission main shaft 2, wherein two main shaft supports positioned in the axial direction are fixed on the base 1, a perforation is formed in the upper portion of each main shaft support, a copper sleeve is sleeved in each perforation, the main shaft is prevented from being worn, the service life is prolonged, the shape of the inner wall of each copper sleeve is matched with the shape of the transmission main shaft 2, the copper sleeve and the transmission main shaft 2 are fixedly connected through cotter pins, the copper sleeve and the transmission main shaft are axially limited, and synchronous rotation is guaranteed.
Two parallel connecting arms 3 are fixed between two spindle supports on the transmission spindle 2, the two connecting arms 3 are perpendicular to the extending direction of the axis of the transmission spindle 2, a moving contact 4 with the length extending along the axis of the transmission spindle 2 is arranged at the outer end of the connecting arm 3, the moving contact 4 is of an integrated strip plate structure, the simultaneous switching-on of all the same contacts is ensured, the reliability of grounding connection is improved, and the electric shock hidden danger of operators is completely eliminated. Corresponding gaskets 5 are fixedly arranged at the outer ends of the connecting arms 3, the upper end faces of the gaskets 5 are attached and fastened with the lower plate faces of the moving contacts 4 through bolts 6 and nuts, so that the moving contacts 4 are mounted, and the conductive reliability of the moving contacts is improved. Two connecting arms 3 and three-phase fixed contact on the transmission main shaft 2 are arranged at intervals, and the two connecting arms 3 isolate the moving contact 4 into three contact parts which respectively correspond to the three-phase fixed contact, so that interference during closing is avoided. The three-phase fixed contact is provided with the grounding clamp 7 which is in clamping fit with the corresponding contact part of the moving contact 4, when the transmission main shaft 2 rotates, the moving contact 4 moves synchronously in an arc, the moving contact 4 is always tangent to a moving path of the moving contact, and is clamped into the corresponding grounding clamp 7 of the three-phase fixed contact along the tangential direction, and stable grounding of the switch cabinet can be realized by conducting electricity through the cabinet body 10.
The two ends of the transmission main shaft 2 extend out of the main shaft support, a shaft sleeve is fixedly arranged at one end of the transmission main shaft, a crank arm and a hanging spring shaft are fixedly arranged on the shaft sleeve, the shaft sleeve and the hanging spring shaft are respectively arranged at two end positions of the crank arm, the axis extending direction of the hanging spring shaft is parallel to the axis of the transmission main shaft 2, and a circumferential annular groove is formed in the hanging spring shaft for hanging one end of a spring. The position corresponding to the hanging spring shaft on the base 1 is also provided with a hanging spring support, a reinforcing rib is fixed between the side surface of the hanging spring support and the upper plate surface of the base 1, a threaded hole is formed in the upper portion of the hanging spring support, the threaded hole is matched with a threaded rod of the hanging spring ring in a tapping mode, on one hand, the effect of fixing the hanging spring ring is achieved, on the other hand, the distance adjustment can be carried out on the hanging spring ring, and the expansion and contraction amount of a spring is changed.
The two ends of the spring are respectively buckled and hung on the hanging spring shaft and the hanging spring ring, when the moving contact 4 deviates from the closing position and is not at the dead point, the distance between the hanging spring shaft and the hanging spring ring is prolonged, the spring stretches and deforms to generate corresponding elastic acting force, the crank arm and the transmission main shaft 2 are driven to reset, and then the moving contact 4 is driven to restore to the closing position. The problem of grounding failure caused by false touching or insufficient closing in actual work is avoided, the hidden danger of electric shock of workers is eliminated, and the safety of operators is ensured. When the moving contact 4 is in a complete closing position, a limiting block is fixed on the base 1 and close to the transmission main shaft 2, a protruding screw is fixed on the limiting block, the outer end face of the screw is in propping fit with the protruding part of the connecting arm 3, limiting of the moving contact 4 is achieved, the moving contact 4 is prevented from striking the fixed contact during closing, and durability of the whole three-phase grounding switch is protected.
The above specific embodiment 1 is a preferred embodiment of the switch cabinet of the present utility model, and in other embodiments, the corresponding structure may be adjusted, simplified or further optimized according to needs, and specifically the following adjustment variations may be available:
in the embodiment 2 of the switch cabinet, the switch cabinet comprises a cabinet body, wherein a three-phase grounding switch and a three-phase static contact are arranged in the cabinet body, the three-phase grounding switch comprises a base fixedly arranged with the cabinet body, a transmission main shaft is rotatably assembled on the base, a connecting arm is vertically connected to the transmission main shaft, an integrated moving contact with the length extending along the axis of the transmission main shaft is arranged at the outer end of the connecting arm, and the moving contact is simultaneously separated from and contacted with the three-phase static contact when driven to rotate by the transmission main shaft, so that switching-on and switching-off are realized. The movable contact in this embodiment may take other forms besides the form in the specific embodiment 1, for example: the movable contact is a bow-shaped plate, the lower end part of the movable contact is fixed with the connecting arm, and the upper end part of the movable contact is used as a contact part to be in clamping connection with the three-phase fixed contact so as to realize closing.
In the embodiment 3 of the switch cabinet according to the present utility model, as a further optimization of the embodiment 2, in order to simplify the structure and reduce the assembly difficulty, the moving contact has a long strip-shaped plate structure, and the plate surface of the moving contact is perpendicular to the length extension direction of the connecting arm.
In embodiment 4 of the switch cabinet according to the present utility model, as a further optimization of embodiment 2, in order to ensure that no interference occurs between the connecting arms and the fixed contacts, two connecting arms are arranged at intervals in the axial direction of the transmission main shaft, and the two connecting arms divide the moving contact into three contact portions corresponding to the three-phase fixed contacts respectively, and in other embodiments, the two connecting arms may be arranged on two outer sides of the transmission main shaft corresponding to the three-phase fixed contacts.
In the embodiment 5 of the switch cabinet according to the present utility model, as a further optimization of any one of embodiments 2 to 4, in order to improve the reliability of the electrical conduction of the movable contact, the outer ends of the connecting arms are fixedly provided with gaskets, the plane where the gaskets are located is perpendicular to the length extension direction of the connecting arms, and the connecting arms are attached and fastened to the movable contact through the gaskets, and in other embodiments, the connecting arms may be welded together with the movable contact, or bent into a right angle, and attached and fastened to the movable contact through the bent portion.
In the embodiment 6 of the switch cabinet according to the present utility model, as a further optimization of the embodiment 4, in order to realize stable grounding of the three-phase grounding switch, the three-phase stationary contact is provided with a grounding clip that is in clamping fit with a corresponding contact portion of the moving contact, and in other embodiments, the grounding clip may be replaced with a connector contact, and is in single-sided contact with the moving contact during closing.
The embodiments of the three-phase grounding switch of the present utility model are the same as the embodiments of the three-phase grounding switch in the embodiment of the switch cabinet of the present utility model, and are not described herein again.
Claims (5)
1. The three-phase grounding switch comprises a base, wherein a transmission main shaft is rotatably assembled on the base, and is characterized in that a connecting arm is vertically connected to the transmission main shaft, and an integrated moving contact which extends along the axis of the transmission main shaft in length and is driven by the transmission main shaft to rotate and is simultaneously separated from and contacted with a three-phase fixed contact so as to realize opening and closing is arranged at the outer end of the connecting arm; the movable contact is of a strip plate-shaped structure, and the plate surface of the movable contact is perpendicular to the length extending direction of the connecting arm; the two connecting arms are arranged at intervals in the axial direction of the transmission main shaft, and divide the moving contact into three contact parts which respectively correspond to the three-phase fixed contact.
2. The three-phase grounding switch according to claim 1, wherein gaskets are fixedly arranged at the outer ends of the connecting arms, the planes of the gaskets are perpendicular to the length extending direction of the connecting arms, and the gaskets are attached and fastened with the movable contact.
3. The switch cabinet comprises a cabinet body, wherein a three-phase grounding switch is arranged in the cabinet body, the three-phase grounding switch comprises a base fixedly arranged with the cabinet body, and a transmission main shaft is rotatably assembled on the base; the movable contact is of a strip plate-shaped structure, and the plate surface of the movable contact is perpendicular to the length extending direction of the connecting arm; the two connecting arms are arranged at intervals in the axial direction of the transmission main shaft, and divide the moving contact into three contact parts which respectively correspond to the three-phase fixed contact.
4. The switch cabinet of claim 3, wherein gaskets are fixedly arranged at the outer ends of the connecting arms, the planes of the gaskets are perpendicular to the length extending direction of the connecting arms, and the gaskets are attached and fastened with the movable contacts.
5. A switch cabinet according to claim 3, characterized in that the three-phase stationary contact is provided with a grounding clip which is in clamping engagement with a corresponding contact portion of the moving contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810557385.XA CN108807063B (en) | 2018-06-01 | 2018-06-01 | Switch cabinet and three-phase grounding switch thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810557385.XA CN108807063B (en) | 2018-06-01 | 2018-06-01 | Switch cabinet and three-phase grounding switch thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108807063A CN108807063A (en) | 2018-11-13 |
| CN108807063B true CN108807063B (en) | 2023-11-28 |
Family
ID=64090190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810557385.XA Active CN108807063B (en) | 2018-06-01 | 2018-06-01 | Switch cabinet and three-phase grounding switch thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108807063B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006309997A (en) * | 2005-04-27 | 2006-11-09 | Mitsubishi Electric Corp | Switching apparatus |
| JP2008091271A (en) * | 2006-10-04 | 2008-04-17 | Toshiba Corp | Three-phase package type grounding switch |
| CN201112231Y (en) * | 2007-10-22 | 2008-09-10 | 厦门协成实业有限公司 | Three-station isolation ground switch |
| CN102176396A (en) * | 2011-03-17 | 2011-09-07 | 上海思源高压开关有限公司 | Three-phase common-box type high-speed earthing switch device |
| CN203056444U (en) * | 2013-02-04 | 2013-07-10 | 深圳市金博联电力技术有限公司 | Isolating ground switch used for solid insulation switch cabinet |
| CN104715957A (en) * | 2013-12-13 | 2015-06-17 | 昆山瑞普电气有限公司 | Improved structure of isolation phase-changing switch |
| WO2017190490A1 (en) * | 2016-05-05 | 2017-11-09 | 国家电网公司 | High-voltage switch and circuit breaker unit thereof |
-
2018
- 2018-06-01 CN CN201810557385.XA patent/CN108807063B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006309997A (en) * | 2005-04-27 | 2006-11-09 | Mitsubishi Electric Corp | Switching apparatus |
| JP2008091271A (en) * | 2006-10-04 | 2008-04-17 | Toshiba Corp | Three-phase package type grounding switch |
| CN201112231Y (en) * | 2007-10-22 | 2008-09-10 | 厦门协成实业有限公司 | Three-station isolation ground switch |
| CN102176396A (en) * | 2011-03-17 | 2011-09-07 | 上海思源高压开关有限公司 | Three-phase common-box type high-speed earthing switch device |
| CN203056444U (en) * | 2013-02-04 | 2013-07-10 | 深圳市金博联电力技术有限公司 | Isolating ground switch used for solid insulation switch cabinet |
| CN104715957A (en) * | 2013-12-13 | 2015-06-17 | 昆山瑞普电气有限公司 | Improved structure of isolation phase-changing switch |
| WO2017190490A1 (en) * | 2016-05-05 | 2017-11-09 | 国家电网公司 | High-voltage switch and circuit breaker unit thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108807063A (en) | 2018-11-13 |
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