CN113675030B - Isolation grounding disconnecting link - Google Patents
Isolation grounding disconnecting link Download PDFInfo
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- CN113675030B CN113675030B CN202110971060.8A CN202110971060A CN113675030B CN 113675030 B CN113675030 B CN 113675030B CN 202110971060 A CN202110971060 A CN 202110971060A CN 113675030 B CN113675030 B CN 113675030B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H21/00—Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
- H01H21/54—Lever switches with blade-type contact co-operating with one or two spring-clip contacts, e.g. knife switch
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H21/00—Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
- H01H21/02—Details
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- 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
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- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
- Mechanisms For Operating Contacts (AREA)
Abstract
The invention provides an isolated grounding disconnecting link, which comprises the following components: the contact assembly comprises a moving contact and a plurality of fixed contacts, the plurality of fixed contacts comprise a feeder fixed contact and a grounding fixed contact, the moving contact is movably arranged and is provided with a closing position in contact with the feeder fixed contact, a grounding position in contact with the grounding fixed contact and a separating position in non-contact with the feeder fixed contact and the grounding fixed contact; the mechanism component is in driving connection with the contact component and can be arranged in a separated mode, the mechanism component can drive and control the moving contact to switch between the fixed contacts, and the mechanism component is positioned in front of the contact component and is away from the moving contact and the right front of the fixed contact of the contact component. The invention solves the problem of low safety of the three-station isolation grounding disconnecting link in the prior art.
Description
Technical Field
The invention relates to the technical field of rail transit, in particular to an isolated grounding disconnecting link.
Background
Before the maintenance of the rail transit, the isolating disconnecting link is disconnected firstly, and then the disconnecting link is grounded after the electricity is checked. Similarly, after the overhaul is completed, the grounding disconnecting link is disconnected firstly, then the disconnecting link is closed to isolate the disconnecting link, and then the subsequent power transmission work can be performed. Thus, the cooperation of the isolation and ground switches is concerned. At present, the common cooperation use of the isolating switch and the grounding switch in the industry comprises the following conditions:
1. The isolating switch cabinet and the grounding switch cabinet are respectively positioned in different cabinets and are arranged at different positions. In this case, the construction cost is relatively high, and the operation of the different positions related to the isolation switch and the grounding switch is inconvenient.
2. The isolation grounding disconnecting link, namely an isolation grounding integrated disconnecting link, is driven by two moving contacts through two motors, and realizes isolation and grounding actions respectively. Compared with the mode of the isolating switch cabinet and the grounding cabinet, the isolating switch cabinet and the grounding cabinet realize isolating grounding integrated control, two cabinet body devices are combined into one cabinet body device, the application of one cabinet body device is reduced, and the relative integration is higher.
At present, with the development of technology, the requirement for isolation and grounding integration is further put forward in the field of rail transit. Namely a moving contact (11) which realizes the operation of two processes of isolation and grounding under the action of a motor. Through the design of three-station isolation grounding disconnecting link, the mechanism is simplified, the cost is lower, and the reliability is higher. Some products of three-station isolation grounding knife switches appear in the market at present. These products, while functionally capable of achieving isolated grounding, have the following problems in the design layout of the overall knife switch:
1) A three-position isolation grounding switch is a primary + secondary device, once comprising a contact portion, typically a high voltage region, with voltage levels that differ according to the voltage level of the rail traffic, such as DC750V, DC1500V, DC3000V, etc. The secondary equipment comprises a control mechanism for the movement of the knife switch, an auxiliary node switch and the like. Most of three-station disconnecting link in the current market are designed as a whole in one time and two times, so-called one-time and two-time separation design concepts are not provided, and strong and weak currents are not provided for separation design, so that signal acquisition and corresponding signal control of secondary equipment are affected;
2) The primary and secondary of the three-station disconnecting link in the market are designed into a whole, once an operator operates secondary equipment such as maintenance or wiring collection auxiliary nodes, the high-voltage risk of the primary contact is always faced, psychological fear is generated on the operator, and certain potential safety hazards are provided;
3) Failure of knife gate products typically occurs in the actuator portion. Due to the short field maintenance time, it is usually only 2 to 3 hours. The three-station disconnecting link in the current market is not designed separately, and the disconnecting link is disassembled intelligently and integrally after sales, and comprises a primary contact and a mechanism, and a primary cable connected with the contact must be disassembled. The primary cable is disassembled, and power failure is required to be carried out on site, so that the maintenance requirement is higher, and quick and flexible problem treatment cannot be carried out;
4) Meanwhile, a three-station disconnecting link in the current market is characterized in that an operating mechanism and a disconnecting link contact part are designed in a front-back layout mode, and the middle of the operating mechanism and the disconnecting link contact part are separated by a partition plate. The operator can not see the contact state of the disconnecting link on the front side, and the adopted means is that an observation port is usually formed in the middle partition plate of the operating mechanism and the disconnecting link contact, and the observation port is smaller because devices related to the mechanism are fully distributed in the middle, so that the state of the disconnecting link is inconvenient to observe. Or directly windows on the side of the cabinet body, so that an operator can only observe from the side.
Disclosure of Invention
The invention mainly aims to provide an isolated grounding disconnecting link, which solves the problem of low safety of a three-station isolated grounding disconnecting link in the prior art.
In order to achieve the above object, the present invention provides an isolated grounding disconnecting link, comprising: the contact assembly comprises a moving contact and a plurality of fixed contacts, the plurality of fixed contacts comprise a feeder fixed contact and a grounding fixed contact, the moving contact is movably arranged and is provided with a closing position in contact with the feeder fixed contact, a grounding position in contact with the grounding fixed contact and a separating position in non-contact with the feeder fixed contact and the grounding fixed contact; the mechanism component is in driving connection with the contact component and can be arranged in a separated mode, the mechanism component can drive and control the moving contact to switch between the fixed contacts, and the mechanism component is positioned in front of the contact component and is away from the moving contact and the right front of the fixed contact of the contact component.
Further, the contact assembly further comprises a main mounting plate, the moving contact and the fixed contact are both arranged on the main mounting plate, the mechanism assembly comprises an auxiliary mounting plate, the main mounting plate and the auxiliary mounting plate are arranged at intervals in parallel, and the moving contact and the fixed contact are located outside the projection range of the auxiliary mounting plate on the main mounting plate.
Further, the auxiliary mounting plate is positioned in the upper area of the main mounting plate and above the movable contact and the static contact.
Further, the surface size of the secondary mounting plate is smaller than the surface size of the primary mounting plate.
Further, the contact assembly further comprises a main shaft, the main shaft penetrates through the main mounting plate and is matched with the moving contact in a driving mode, the mechanism assembly comprises a driving piece and a connecting shaft, the connecting shaft penetrates through the auxiliary mounting plate and is in driving connection with the main shaft, the driving piece drives the moving contact to rotate through the connecting shaft and the main shaft, and the main shaft and the connecting shaft are arranged in a separable mode.
Further, the mechanism assembly includes: a driving member; the connecting shaft is used for driving the moving contact to move and is in driving connection with the driving piece; the driving control switch is electrically connected with the driving piece and can control the starting and stopping of the driving piece; the auxiliary node switch is matched with the external part; the driving control cam is used for triggering the driving control switch, is in driving connection with the connecting shaft and synchronously rotates; the auxiliary node cam is used for triggering the auxiliary node switch, the auxiliary node cam is in driving connection with the connecting shaft and synchronously rotates, and the width of the triggering end of the auxiliary node cam is larger than that of the triggering end of the driving control cam, so that the auxiliary node cam triggers the auxiliary node switch to trigger the driving control switch before the driving control cam triggers the driving control switch.
Further, the width of the trigger end of the auxiliary node cam is 15-25% greater than the width of the trigger end of the drive control cam.
Further, the mechanism component comprises a connecting shaft for driving the moving contact to move, a first limiting part and a middle limiting component, wherein the first limiting part is connected with the connecting shaft and synchronously rotates, a limiting hole is formed in the first limiting part, the middle limiting component is provided with a limiting end, when the moving contact is located at the opening position, the limiting hole is aligned with the limiting end, and the limiting end can extend into the limiting hole so as to keep the moving contact at the opening position.
Further, the intermediate limiting assembly includes: a base; the marble is movably arranged on the base in a penetrating way, and is provided with a limiting end which is arc-shaped and can extend out of the base to extend into the limiting hole; the elastic piece is arranged in the base, and two ends of the elastic piece are respectively abutted with the base and the marble and provide elasticity for the marble to extend into the limiting hole.
Further, the mechanism assembly further comprises an end limiting block, the end limiting block is located on the rotating path of the first limiting piece, and when the moving contact rotates to the closing position or the grounding position, the first limiting piece is abutted with the end limiting block so as to control the rotating range of the moving contact.
Further, the plurality of stationary contacts further include a middle stationary contact, along a moving track line of the moving contact, the middle stationary contact is located between the feeder stationary contact and the ground stationary contact, and when the moving contact is located at the opening position, the moving contact is in contact with the middle stationary contact.
Further, the mechanism assembly includes: the connecting shaft is in driving fit with the moving contact and synchronously rotates with the moving contact; the first manual shaft is in driving connection with the connecting shaft; the second manual shaft is in driving connection with the connecting shaft; the crank can be matched with the first manual shaft or the second manual shaft, and the position of the movable contact is switched by the first manual shaft or the second manual shaft; the second limiting piece is connected with the connecting shaft and synchronously rotates, the second limiting piece can shield or avoid the front of the first manual shaft or the second manual shaft so as to prevent or avoid the crank from abutting against the first manual shaft or the second manual shaft, when the movable contact is positioned at the closing position, the second limiting piece shields the second manual shaft while avoiding the first manual shaft, the crank can be in driving connection with the first manual shaft, and the movable contact is driven by the first manual shaft to be switched from the closing position to the opening position; when the movable contact moves to the opening position, the second limiting piece is abutted with the crank and used for preventing the crank from driving the movable contact to rotate continuously, the second limiting piece avoids the second manual shaft, the crank can be switched to the second manual shaft by the first manual shaft, and the movable contact is driven to be switched to the grounding position by the opening position by the second manual shaft.
Further, the second limiting piece is provided with a first avoidance concave part and a second avoidance concave part, the first avoidance concave part is used for avoiding the first manual shaft, the second avoidance concave part is used for avoiding the second manual shaft, when the moving contact moves to the opening position, the side wall of the first avoidance concave part is abutted with the crank and prevents the moving contact from continuing to rotate, and the second avoidance concave part is aligned with the second manual shaft so that the crank can be switched to the second manual shaft from the first manual shaft.
Further, the distance between the first escape recess and the second escape recess is equal to the distance between the first manual shaft and the second manual shaft.
Further, the second limiting piece is also provided with a stop part, and when the crank drives the moving contact to move to the grounding position, the stop part is abutted with the crank and prevents the crank from driving the moving contact to rotate continuously.
Further, the mechanism assembly further comprises: a driving member; the speed reducing mechanism is in driving connection with the driving piece; the driving piece drives the connecting shaft to rotate through the speed reducing mechanism and the transmission mechanism.
Further, the contact assembly further comprises: the movable contact and the fixed contact are arranged on the main mounting plate; an insulator is arranged between the movable contact, the fixed contact and the main mounting plate; the main shaft is arranged on the main mounting plate in a penetrating way and is in driving fit with the mechanism component; the crank connecting rod mechanism comprises a crank and a connecting rod, the crank is in driving connection with the main shaft and synchronously rotates, and two ends of the connecting rod are respectively connected with the crank and the moving contact to drive the moving contact to rotate.
By adopting the technical scheme of the invention, the contact assembly and the mechanism assembly are in modularized separation design, so that the two parts form two relatively independent assemblies, and the disassembly and the assembly can be quickly realized during the installation, and the replacement of a fault mechanism can be quickly realized on site. Due to the modularized separation type design, the contact assembly and the mechanism assembly can be independently operated according to the needs, when the operation such as maintenance is carried out subsequently, maintenance personnel only need to detach the mechanism assembly, the contact assembly and related cables are not required to be detached once, so that the safety of personnel operation is improved, the mechanism assembly can be quickly replaced, maintenance and overhaul of a disconnecting link product can be quickly realized, meanwhile, the mechanism assembly can be replaced in an electrified manner, the disconnecting link is not required to be powered off, and normal use is not influenced. Meanwhile, the mechanism component of the embodiment is arranged in front of the contact component, and is matched with the separated design mode of the contact component and the mechanism component, so that the whole disconnecting link can be installed in a primary chamber when being installed, a secondary mechanism component is installed in a secondary chamber, maintenance personnel only need to open the secondary chamber when maintaining or wiring to collect auxiliary nodes, the contact component in a high-voltage area is not required, and the design of the isolated grounding disconnecting link is safer and more reliable. In addition, the mechanism component avoids the front of the contact component, so that the mechanism component can not shade the contact component while ensuring the separation of the contact component and the mechanism component, an operator can easily observe the opening and closing condition of the contact component, and the problem that the operator can not observe the contact state due to the shielding of the contact part is solved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:
FIG. 1 shows a schematic structural diagram of an isolated grounding knife switch of the present application;
FIG. 2 shows a schematic structural view of the contact assembly of the isolated ground knife switch of FIG. 1;
FIG. 3 shows a schematic structural view of the mechanical assembly of the isolated earthing knife-switch of FIG. 1;
FIG. 4 shows a schematic structural view of the back of the mechanism assembly of FIG. 1;
fig. 5 shows a schematic structural diagram of the isolated grounding disconnecting link in fig. 1 during closing;
FIG. 6 shows a schematic diagram of the isolated earthing knife-switch of FIG. 1 in a switch-off configuration;
FIG. 7 is a schematic view of the isolated grounding switch of FIG. 1 when grounded;
FIG. 8 shows a side view of the isolated grounding switch of FIG. 1;
FIG. 9 is a schematic diagram showing the drive connection of the main shaft and the connecting shaft of the isolated earth blade of FIG. 1;
FIG. 10 is an exploded view of the mechanical assembly part of the isolated earthing knife-switch of FIG. 1;
FIG. 11 is a schematic diagram showing the magnitude relationship between the drive control cam and the auxiliary node cam of FIG. 10;
FIG. 12 is a schematic view of the intermediate stop assembly of the isolated ground knife switch of FIG. 1 mated with a first stop;
FIG. 13 is a schematic view showing the structure of the first stopper in FIG. 12;
FIG. 14 shows a schematic view of the intermediate stop assembly of FIG. 12;
FIG. 15 shows a schematic structural view of a second stop member of the isolated ground knife switch of FIG. 1;
FIG. 16 is a schematic view of the isolated grounding switch of FIG. 1 showing the crank interfacing with a first manual shaft during closing;
FIG. 17 is a schematic view showing the structure of the isolating earthing knife in FIG. 1 in which the crank is in abutment with the first relief recess during opening;
FIG. 18 shows a schematic view of the isolated earthing knife switch of FIG. 1 with the crank switched to interface with a second manual shaft;
FIG. 19 is a schematic view showing the structure of the isolation grounding switch in FIG. 1 in which the crank abuts against the stopper when the isolation grounding switch is grounded;
FIG. 20 is a schematic diagram showing the configuration of the drive member of the isolated earthing knife-switch of FIG. 1 in cooperation with a reduction mechanism and a transmission mechanism;
fig. 21 shows a schematic structural view of the first manual shaft and the second manual shaft of the isolated earthing knife-switch in fig. 1, which are matched with the connecting shaft.
Wherein the above figures include the following reference numerals:
10. a contact assembly; 11. a moving contact; 12. a feeder fixed contact; 13. a grounding static contact; 14. a main mounting plate; 15. a main shaft; 16. a middle fixed contact; 17. an insulator; 18. a crank; 19. a connecting rod; 20. a mechanism assembly; 21. a secondary mounting plate; 22. a driving member; 23. a connecting shaft; 24. driving a control switch; 25. an auxiliary node switch; 26. driving a control cam; 27. an auxiliary node cam; 28. a first limiting member; 281. a limiting hole; 29. a middle limit component; 291. a base; 292. a marble; 293. an elastic member; 210. an end limiting block; 220. a first manual shaft; 230. a second manual shaft; 240. a crank; 250. a second limiting piece; 2501. a first relief recess; 2502. a second relief recess; 2503. a stop portion; 260. a speed reducing mechanism; 270. a transmission mechanism; 280. an auxiliary mounting plate; 30. and (5) connecting the columns.
Detailed Description
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.
It is noted that all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs unless otherwise indicated.
In the present application, unless otherwise indicated, terms of orientation such as "upper, lower, top, bottom" are used generally with respect to the orientation shown in the drawings or with respect to the component itself in the vertical, upright or gravitational direction; also, for ease of understanding and description, "inner and outer" refers to inner and outer relative to the profile of each component itself, but the above-mentioned orientation terms are not intended to limit the present application.
The application provides an isolated grounding disconnecting link, which aims to solve the problem of low safety of a three-station isolated grounding disconnecting link in the prior art.
The isolating and grounding disconnecting link as shown in fig. 1 to 21 comprises a contact assembly 10 and a mechanism assembly 20, wherein the contact assembly 10 comprises a moving contact 11 and a plurality of fixed contacts, the plurality of fixed contacts comprise a feeder fixed contact 12 and a grounding fixed contact 13, the moving contact 11 is movably arranged and has a closing position in contact with the feeder fixed contact 12, a grounding position in contact with the grounding fixed contact 13 and a disconnecting position in non-contact with the feeder fixed contact 12 and the grounding fixed contact 13; the mechanism assembly 20 is in driving connection with the contact assembly 10, the mechanism assembly 20 and the contact assembly 10 are arranged in a separable manner, the mechanism assembly 20 can drive and control the moving contact 11 to switch between the fixed contacts, and the mechanism assembly 20 is positioned in front of the contact assembly 10 and is away from the moving contact 11 and the right front of the fixed contact of the contact assembly 10.
In the embodiment, the contact assembly 10 and the mechanism assembly 20 are in a modularized separation type design, so that two parts form two relatively independent assemblies, the disassembly and the assembly can be quickly realized during the installation, and the replacement of a fault mechanism can be quickly realized on site. Due to the modularized separation type design, the contact assembly 10 and the mechanism assembly 20 can be independently operated according to the needs, when the subsequent maintenance and other operations are carried out, maintenance personnel only need to detach the mechanism assembly 20, the once contact assembly 10 and related cables are not required to be detached, the safety of personnel operation is improved, the mechanism assembly 20 can be quickly replaced, the maintenance and overhaul of a disconnecting link product can be quickly realized, meanwhile, the live replacement of the mechanism assembly 20 can be realized, the disconnecting link is not required to be subjected to power-off treatment, and the normal use is not influenced. Meanwhile, the mechanism assembly 20 of the embodiment is arranged in front of the contact assembly 10, and the contact assembly 10 and the mechanism assembly 20 are matched in a separated design manner, so that the whole disconnecting link can be installed in a primary chamber when being installed, the secondary mechanism assembly 20 is installed in a secondary chamber, maintenance personnel only need to open the secondary chamber when maintaining or wiring collecting auxiliary nodes, and the contact assembly 10 facing a high-voltage area is not needed, so that the design of the isolated grounding disconnecting link is safer and more reliable. In addition, the mechanism assembly 20 avoids the front of the contact assembly 10, so that the contact assembly 10 is separated from the mechanism assembly 20, the mechanism assembly 20 can not shield the contact assembly 10, an operator can easily observe the opening and closing condition of the contact assembly 10, and the problem that the operator cannot observe the contact state due to shielding of the contact part is solved.
It should be noted that, in this embodiment, the front and rear directions are the directions in which the isolation grounding switch is normally used, that is, the directions close to the maintainer are the front directions and the directions far away from the maintainer are the rear directions when the maintainer is normally used.
As shown in fig. 1 and 2, the contact assembly 10 further includes a main mounting plate 14, the moving contact 11 and the fixed contact are both disposed on the main mounting plate 14, the fixed contact of this embodiment is fixedly disposed on the main mounting plate 14, the moving contact 11 is communicated with the contact net, one end of the moving contact 11 is rotatably disposed on the main mounting plate 14, and the other end of the moving contact 11 can be matched with each fixed contact. The mechanism assembly 20 comprises a secondary mounting plate 21, wherein the primary mounting plate 14 and the secondary mounting plate 21 are arranged at intervals in parallel, a connecting column 30 is arranged between the primary mounting plate 14 and the secondary mounting plate 21 in the embodiment, the end part of the connecting column 30 is connected with the primary mounting plate 14 and the secondary mounting plate 21 through fasteners such as bolts, so that the two are connected into a whole, when the mechanism assembly 20 needs to be replaced, the fasteners can be detached, the secondary mounting plate 21 and parts on the secondary mounting plate can be taken down integrally, the mechanism assembly 20 and the contact assembly 10 are separated, and maintenance and replacement of the mechanism assembly 20 are realized. In addition, the moving contact 11 and the fixed contact in the embodiment are located outside the projection range of the auxiliary mounting plate 21 on the main mounting plate 14, so that the auxiliary mounting plate 21 does not shield the moving contact 11 and the fixed contact, maintenance personnel can intuitively observe the matching relationship between the moving contact 11 and the fixed contact, and the state of the isolated grounding disconnecting link is judged.
As shown in fig. 1 and 8, the surface size of the sub-mounting plate 21 of the present embodiment is smaller than the surface size of the main mounting plate 14, and the sub-mounting plate 21 is located in the upper region of the main mounting plate 14, and the moving contact 11 and the fixed contact are located in the middle and lower regions of the main mounting plate 14, so that the sub-mounting plate 21 is located above the moving contact 11 and the fixed contact, and the mechanism assembly 20 is convenient to detach while avoiding the moving contact 11 and the fixed contact. Of course, the positional relationship between the sub-mounting plate 21 and the main mounting plate 14 and the moving contact 11 and the fixed contact may be adjusted as needed, as long as the mechanism assembly 20 is ensured to be positioned in front of the main mounting plate 14 and to avoid the moving contact 11 and the fixed contact.
As shown in fig. 2, the contact assembly 10 of the present embodiment includes a main shaft 15, a crank link mechanism, and an insulator 17 in addition to the moving contact 11, the fixed contact, and the main mounting plate 14. The main shaft 15 is arranged on the main mounting plate 14 in a penetrating manner, the main shaft 15 is in driving connection with the connecting shaft 23 of the mechanism assembly 20, a non-circular protrusion and a non-circular groove are respectively formed on the main shaft 15 and the connecting shaft 23, as shown in fig. 9, the non-circular protrusion extends into the non-circular groove, so that driving connection between the main shaft 15 and the connecting shaft 23 is realized, the mechanism assembly 20 can drive the main shaft 15 to rotate through the connecting shaft 23, meanwhile, separable arrangement is realized between the main shaft 15 and the connecting shaft 23 in the above-mentioned matching manner, when the mechanism assembly 20 is detached, the non-circular protrusion is separated from the non-circular groove, and the main shaft 15 and the connecting shaft 23 can be separated, so that the mechanism assembly 20 and the contact assembly 10 are separated. The crank-link mechanism comprises a crank 18 and a link 19, one end of the crank 18 is in driving connection with the main shaft 15, the crank 18 and the link 19 rotate synchronously, one end of the link 19 is connected with one end of the crank 18 far away from the main shaft 15, and the other end of the link 19 is connected with the middle part of the moving contact 11, so that when the mechanism assembly 20 drives the main shaft 15 to rotate through the connecting shaft 23, the main shaft 15 drives the crank 18 to rotate, the crank 18 drives the link 19 to rotate, and the link 19 can drive the moving contact 11 to rotate around one end to realize the matching of the other end and each static contact. An insulator 17 is arranged between the moving contact 11 and each fixed contact and the main mounting plate 14, and the insulator 17 can isolate the conduction relation between the moving contact 11 and the fixed contact and the main mounting plate 14, so that the main mounting plate 14 is prevented from being electrified due to the influence of the moving contact 11 and the fixed contact. Of course, the manner of engagement between the contact assembly 10 and the mechanism assembly 20 may also be varied as desired, such as by gear engagement or the like.
The mechanism assembly 20 of the present embodiment includes a driving member 22 and a connecting shaft 23, the driving member 22 is a motor, and is installed in front of the auxiliary mounting plate 21, the connecting shaft 23 is penetratingly arranged on the auxiliary mounting plate 21 and is in driving connection with the main shaft 15, and when the moving contact 11 is required to rotate, the driving member 22 drives the moving contact 11 to rotate through the connecting shaft 23 and the main shaft 15.
As shown in fig. 10 and 11, the mechanism assembly 20 of the present embodiment further includes a drive control switch 24, an auxiliary node switch 25, a drive control cam 26 for triggering the drive control switch 24, and an auxiliary node cam 27 for triggering the auxiliary node switch 25. The driving control switch 24 is electrically connected with the driving member 22 and can control the driving member 22 to start or stop, and when the driving control cam 26 triggers the driving control switch 24, the driving control switch 24 can control the driving member 22 to stop. The auxiliary node switch 25 is matched with the external part, and is used for transmitting the rotation position of the connecting shaft 23 to the external part and judging the state of the isolated grounding disconnecting link so that the external part is matched with the state of the isolated grounding disconnecting link. The driving control cam 26 and the auxiliary node cam 27 are sleeved on the connecting shaft 23 and are in driving connection with the connecting shaft 23, and the driving control cam 26 and the auxiliary node cam synchronously rotate. When the connecting shaft 23 rotates, the driving control cam 26 and the auxiliary node cam 27 on the connecting shaft 23 rotate together, so that when the moving contact 11 rotates to the closing position, the grounding position and the opening position, the driving control cam 26 and the auxiliary node cam 27 can trigger the driving control switch 24 and the auxiliary node switch 25 respectively. And the width of the trigger end of the auxiliary node cam 27 of the present embodiment is larger than the width of the trigger end of the drive control cam 26, so that the action of the auxiliary node cam 27 to trigger the auxiliary node switch 25 precedes the action of the drive control cam 26 to trigger the drive control switch 24. The arrangement is that the drive control cam 26 and the auxiliary node cam 27 cannot be completely consistent due to the limitation of the processing technology during processing, and errors exist, so that the drive control cam 26 and the auxiliary node cam 27 are difficult to trigger the drive control switch 24 and the auxiliary node switch 25 simultaneously during rotation of the connecting shaft 23. When the connecting shaft 23 rotates fast, the error has little influence on detection, and the driving control switch 24 and the auxiliary node switch 25 are triggered almost simultaneously and can be ignored; in a low-temperature environment, the speed of the driving member 22 is slow, and the rotation speed of the connecting shaft 23 is slow, so that an error between the driving control cam 26 and the auxiliary node cam 27 is amplified, the driving control switch 24 is triggered before the auxiliary node switch 25, the driving member 22 is stopped, once the driving member 22 is stopped, the auxiliary node cam 27 cannot continuously trigger the auxiliary node switch 25, and the auxiliary node state acquired by the background is inconsistent with the actual state of the motor, so that the cooperation between the external part and the isolated grounding disconnecting link is affected, and even a safety accident occurs. To avoid this, the present embodiment makes the width of the trigger end of the auxiliary node cam 27 larger than that of the trigger end of the drive control cam 26, so that the action of the auxiliary node cam 27 to trigger the auxiliary node switch 25 must be prioritized over the action of the drive control cam 26 to trigger the drive control switch 24, thereby ensuring the reliability of the triggering of the auxiliary node switch 25.
Preferably, the width of the trigger end of the auxiliary node cam 27 is 15-25% greater than the width of the trigger end of the drive control cam 26. Further preferably 20%, and the auxiliary node cam 27 is prevented from damaging the auxiliary node switch 25 due to an excessive movement distance of the auxiliary node cam 27 on the premise that the auxiliary node cam 27 is ensured to trigger the auxiliary node switch 25 preferentially.
The number of the drive control switch 24, the auxiliary node switch 25, the drive control cam 26, and the auxiliary node cam 27 may be set as needed.
As shown in fig. 4 and 12 to 14, in the present embodiment, the mechanism assembly 20 further includes a first stopper 28, an intermediate stopper assembly 29, and an end stopper 210. The first limiting member 28 is disposed on the back surface of the sub-mounting plate 21, and is connected to the connecting shaft 23, and the first limiting member 28 in this embodiment is disposed in a fan-shaped structure. The first limiting member 28 has three positions corresponding to the three positions of the moving contact 11. Specifically, two end limiting blocks 210 are provided, and the two end limiting blocks 210 are respectively located on the rotation paths of the first limiting member 28 in two directions, and when the moving contact 11 rotates to the closing position or the grounding position, the first limiting member 28 abuts against the end limiting block 210 to control the rotation range of the moving contact 11, wherein the position is the limit position of the first limiting member 28, that is, the rotatable limit position of the moving contact 11. The middle limiting component 29 controls the first limiting member 28 to be kept at a position between two limiting positions, the first limiting member 28 of the embodiment is provided with a limiting hole 281, the middle limiting component 29 is provided with a movable limiting end, when the moving contact 11 is located at the opening position, the limiting hole 281 is aligned with the limiting end, and the limiting end can extend into the limiting hole 281, so that the position of the first limiting member 28 is kept, namely the moving contact 11 is kept at the opening position, and the moving contact 11 can be accurately and reliably switched between three positions.
In this embodiment, the middle limiting component 29 includes a base 291, a marble 292 and an elastic member 293, where the base 291 is provided with a mounting hole, the marble 292 is columnar, and movably passes through the mounting hole, one end of the marble 292 can extend out of the mounting hole and thus extend into the limiting hole 281 of the first limiting component 28, the end is a limiting end of the middle limiting component 29, and the end is set to be arc-shaped, and the embodiment is set to be hemispherical, so that when the moving contact 11 rotates to the opening position, the marble 292 aligns with the limiting hole 281, and the marble 292 can extend out of the base 291 and extend into the limiting hole 281 to realize the stabilization of the position of the first limiting component 28, so that the moving contact 11 can be stabilized at the opening position and cannot move at will. It should be noted that, the limiting action of the marble 292 on the first limiting member 28 is limited, and the movement of the first limiting member 28 is not completely blocked, in other words, when the moving contact 11 moves from the opening position to the closing position or the grounding position, the connecting shaft 23 drives the first limiting member 28 to rotate, at this time, the first limiting member 28 presses the limiting end of the marble 292, and the limiting end is hemispherical, so that the limiting end exits the limiting hole 281 under the pressing of the first limiting member 28, and thus the limiting action on the first limiting member 28 is not performed any more, so that the first limiting member 28 can rotate freely. The elastic member 293 of this embodiment adopts a spring, which is disposed in the base 291, and two ends of the elastic member 293 respectively abut against the base 291 and the marble 292, so that the elastic member 293 makes the marble 292 have an elastic force extending out of the base 291 and extending into the limiting hole 281 all the time, and when the moving contact 11 rotates to the opening position, the marble 292 can automatically extend into the limiting hole 281 under the action of the elastic member 293.
As shown in fig. 5 to 7, the fixed contacts include a feeder fixed contact 12, a ground fixed contact 13 and an intermediate fixed contact 16, and the intermediate fixed contact 16 is located between the feeder fixed contact 12 and the ground fixed contact 13 along a moving track line of the moving contact 11, wherein the feeder fixed contact 12 is conducted with the feeder, the ground fixed contact 13 is conducted with the ground line, and the intermediate fixed contact 16 is not conducted with the line. Generally, the motor of the isolating grounding disconnecting link needs to realize the movement from the isolating switch-on to the middle switch-off or from the grounding position to the middle switch-off within the range of 45 degrees, which brings forth the requirement on the movement speed of the motor, otherwise, the motor cannot cause the too fast movement of the switch-off position to generate larger impact and can not stop at the switch-off position accurately, and based on the embodiment, the middle fixed contact 16 is arranged, the movable contact 11 contacts with the middle fixed contact 16 when the movable contact 11 moves to the switch-off position, and the middle fixed contact 16 is used as an auxiliary structure design for motor deceleration to realize the braking of the movable contact 11, so that the movable contact 11 stops at the switch-off position stably and accurately. The above-mentioned middle stationary contact 16 and middle spacing subassembly 29 both function effect similar, can make moving contact 11 stabilize in the separating brake position to guarantee moving contact 11 position's reliability. Of course, one of the above two structures may be selectively provided as needed.
As shown in fig. 16 to 21, the mechanism assembly 20 includes, in addition to the sub-mount plate 21 and the connection shaft 23, a first manual shaft 220, a second manual shaft 230, a crank 240, and a second stopper 250. Wherein, the first manual shaft 220 and the second manual shaft 230 are in driving connection with the connecting shaft 23; the crank 240 can be inserted into the first manual shaft 220 or the second manual shaft 230, and is matched with the first manual shaft 220 or the second manual shaft 230, the first manual shaft 220 or the second manual shaft 230 drives the movable contact 11 to switch positions, and the manual shaft specifically matched with the crank 240 is adjusted according to actual needs. The second limiting member 250 is connected with the connecting shaft 23, and the two rotate synchronously, the second limiting member 250 is located in front of the first manual shaft 220 and the second manual shaft 230, and the second limiting member 250 can block or avoid the front of the first manual shaft 220 or the second manual shaft 230, so as to prevent or avoid the crank 240 from abutting against the first manual shaft 220 or the second manual shaft 230.
The specific matching process among the components is as follows: when the isolated earthing knife-switch is normally used, as shown in fig. 16, the moving contact 11 is located at the closing position, and at this time, the second limiting member 250 is away from the first manual shaft 220 and shields the second manual shaft 230, so that the crank 240 can only be inserted onto the first manual shaft 220, and is in driving connection with the first manual shaft 220, but cannot cooperate with the second manual shaft 230, thus, the crank 240 drives the moving contact 11 to switch from the closing position to the opening position through the first manual shaft 220, the connecting shaft 23, the main shaft 15, the crank 18, the connecting rod 19 and other components, and in the rotating process, the second limiting member 250 is gradually close to the crank 240. Until the moving contact 11 moves to the opening position, as shown in fig. 17, the second limiting member 250 abuts against the crank 240, at this time, the second limiting member 250 cannot rotate continuously, and the connecting shaft 23, the first manual shaft 220 and the crank 240 cannot rotate, so that the effect of preventing the crank 240 from driving the moving contact 11 to rotate continuously is achieved, meanwhile, the second limiting member 250 avoids the second manual shaft 230, the crank 240 can abut against the second manual shaft 230, at this time, an operator manually pulls out the crank 240 from the first manual shaft 220 and switches the crank 240 to the second manual shaft 230, as shown in fig. 18, the second limiting member 250 does not stop the crank 240, the connecting shaft 23 and other parts can rotate continuously, and the operator can drive the moving contact 11 to rotate continuously through the second manual shaft 230 by rotating the crank 240 and switch the moving contact 11 to the grounding position. The above arrangement mode makes the crank 240 and the second limiting member 250 form a mutual self-locking and limiting relationship, so that the crank 240 can independently control two processes from the closing position to the opening position and from the opening position to the grounding position, thereby being simpler and more convenient in the design of preventing misoperation in manual operation.
In this embodiment, the second limiting member 250 has a non-circular disc shape, and two opposite sides thereof are respectively provided with a first avoidance recess 2501 and a second avoidance recess 2502, as shown in fig. 15, where the first avoidance recess 2501 is used for avoiding the first manual shaft 220, and the second avoidance recess 2502 is used for avoiding the second manual shaft 230. Specifically, when the movable contact 11 is in the closing position, the first escape recess 2501 is offset from the first manual shaft 220, and the second escape recess 2502 is offset from the second manual shaft 230, but the second stopper 250 is in front of the first manual shaft 220, and the second stopper 250 shields the second manual shaft 230, so that the crank 240 can be only driven to connect with the first manual shaft 220, but cannot be abutted with the second manual shaft 230, and the crank 240 can only drive the movable contact 11 to rotate by the first manual shaft 220. When the movable contact 11 moves to the opening position, the crank 240 is necessarily engaged with the first manual shaft 220, so that the side wall of the first avoidance recess 2501 is necessarily abutted against the crank 240, the effect of preventing the crank 240 and the movable contact 11 from continuing to rotate is achieved, and at the same time, the second limiting member 250 rotates until the second avoidance recess 2502 is aligned with the second manual shaft 230, at this time, the crank 240 can be switched from the first manual shaft 220 to the second manual shaft 230, and then the movable contact 11 is driven to continue to rotate by the second manual shaft 230.
Preferably, the distance between the first relief recess 2501 and the second relief recess 2502 is equal to the distance between the first manual shaft 220 and the second manual shaft 230 to ensure that the second relief recess 2502 is aligned with the second manual shaft 230 when the first relief recess 2501 stops the crank 240.
As shown in fig. 19, in the present embodiment, the second limiting member 250 further has a stop 2503, and when the crank 240 drives the moving contact 11 to move to the grounding position, the stop 2503 abuts against the crank 240, so that the connecting shaft 23 cannot continue to rotate, thereby achieving the effect of preventing the crank 240 from driving the moving contact 11 to continue to rotate. The second limiting member 250 and the first limiting member 28 of the present embodiment can both limit the moving contact 11 when rotating to the closing position and the grounding position, and of course, the limiting effect of the second limiting member 250 and the first limiting member 28 can also be selectively set as required. For example, the second stopper 250 does not provide the stopper 2503, and only the first stopper 28 is used to limit the movement of the moving contact 11 to the closing position and the grounding position.
When the isolation grounding disconnecting link is installed in the cabinet body, misoperation prevention can be realized only by locking holes penetrating through the crank 240. Specifically, two electromagnetic locks of the first electromagnetic lock and the second electromagnetic lock can be arranged on a cabinet door of the cabinet body, and locking holes of the first electromagnetic lock and the second electromagnetic lock are aligned with the first manual shaft 220 and the second manual shaft 230 respectively and used for locking the crank 240 to prevent misoperation. Before manual operation, the first electromagnetic lock and the second electromagnetic lock are locked, and the crank 240 cannot pass through the electromagnetic locks to be connected with the manual shaft. When the condition that the isolating earthing knife-switch is separated from the closing position to the separating position is satisfied, the lock Kong Jiesuo of the first electromagnetic lock is closed, and the crank 240 can pass through the locking hole of the first electromagnetic lock, pass through the second limiting piece 250, be connected with the first manual shaft 220, and shake the moving contact 11, so that the moving contact 11 moves to the separating position, and at this time, the moving contact 11 stops moving under the action of the second limiting piece 250. The operator then pulls the crank 240 out of the first manual shaft 220 and the first electromagnetic lock may be automatically locked. When the condition that the isolating earthing knife-switch moves from the opening position to the earthing position is satisfied, the lock Kong Jiesuo of the second electromagnetic lock is closed, and the crank 240 can pass through the locking hole of the second electromagnetic lock, pass through the second limiting member 250, connect with the second manual shaft 230, and shake the moving contact 11, so that the moving contact 11 moves to the earthing position, and at this time, the moving contact 11 stops moving under the action of the second limiting member 250 and the first limiting member 28. Therefore, the whole operation of the isolation grounding disconnecting link is prevented from being mistaken, and the use is safer.
As shown in fig. 21, the mechanism assembly 20 of the present embodiment is provided with an installation box, the connection shaft 23, the first manual shaft 220 and the second manual shaft 230 are all arranged in the installation box in a penetrating manner, gears are further arranged in the installation box, the gears are sleeved on the connection shaft 23, the first manual shaft 220 and the second manual shaft 230 are respectively located at two opposite sides of the connection shaft 23, and the first manual shaft 220 and the second manual shaft 230 are engaged and driven by the gears, so that the first manual shaft 220 and the second manual shaft 230 can drive the connection shaft 23 to rotate.
As shown in fig. 3, in the mechanism assembly 20 of the present embodiment, the driving control switch 24, the auxiliary node switch 25, the driving control cam 26 and the auxiliary node cam 27 are disposed, so that the mechanism assembly 20 is disposed in two layers, that is, the mechanism assembly 20 further includes an auxiliary mounting plate 280, the auxiliary mounting plate 280 is located in front of the auxiliary mounting plate 21 and has a space with the auxiliary mounting plate 21, the connecting shaft 23 is disposed on the auxiliary mounting plate 21 and the auxiliary mounting plate 280, the auxiliary node switch 25 and the auxiliary node cam 27 are disposed in the space between the auxiliary mounting plate 21 and the main mounting plate 14, and the driving member 22, the driving control switch 24, the driving control cam 26, the mounting box, the second limiting member 250 and other members are disposed in front of the auxiliary mounting plate 280. Of course, the particular arrangement of the mechanism assembly 20 may also be adjusted as desired.
As shown in fig. 20, the mechanism assembly 20 of the present embodiment further includes a speed reducing mechanism 260 and a transmission mechanism 270, both of which are disposed in front of the auxiliary mounting plate 280, the speed reducing mechanism 260 being in driving connection with the driving member 22; the transmission mechanism 270 is in driving connection with the speed reducing mechanism 260 and the connecting shaft 23, and the driving piece 22 drives the connecting shaft 23 to rotate through the speed reducing mechanism 260 and the transmission mechanism 270. The electric control and the manual operation are not interfered with each other. The speed reducing mechanism 260 of the present embodiment adopts a planetary speed reducing mechanism, and the transmission mechanism 270 adopts a worm gear mechanism, however, other mechanisms may be adopted as required.
It should be noted that, in the above embodiments, a plurality refers to at least two.
From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:
1. the problem of the three-station isolation grounding disconnecting link in the prior art that the safety is low is solved;
2. the contact assembly and the mechanism assembly are in a modularized separation type design, so that two parts form two relatively independent assemblies, and the disassembly and the assembly can be quickly realized during the assembly, and the replacement of a fault mechanism can be quickly realized on site;
3. Maintenance personnel only need to disassemble the mechanism assembly, and the contact assembly and related cables are not required to be disassembled once, so that the safety of personnel operation is improved;
4. the novel mechanism component is quickly replaced, and maintenance and overhaul of a disconnecting link product are quickly realized;
5. the live replacement of the mechanism components can be realized on site, and the disconnecting link does not need to be subjected to power-off treatment, so that the normal use is not affected;
6. when maintenance personnel perform maintenance or wiring collection auxiliary nodes, only the secondary chamber is required to be opened, and a contact assembly facing a high-voltage area is not required, so that the design of the isolation grounding disconnecting link is safer and more reliable;
7. the mechanism component avoids the right front of the contact component, so that the contact component is not shielded by the mechanism component while the contact component is separated from the mechanism component, and an operator can easily observe the opening and closing condition of the contact component;
8. the action of the auxiliary node cam triggering auxiliary node switch must be prioritized over the action of the drive control cam triggering drive control switch, so that the reliability of the triggering of the auxiliary node switch is ensured;
9. the middle limiting component realizes that the moving contact is accurately and reliably kept at the opening position;
10. The middle fixed contact is used as an auxiliary structure design for motor deceleration, so that braking of the moving contact is realized, and the moving contact is stably and accurately stopped at the brake-separating position;
11. the crank and the second limiting piece form a mutual self-locking limiting relation, so that the crank can independently control two processes from a closing position to a separating brake position and from the separating brake position to a grounding position, and the manual operation is simpler and more convenient in design;
12. in the aspect of error prevention design, the error prevention operation can be realized only by locking the hole penetrated by the crank, so that the whole error prevention design is simpler.
It will be apparent that the embodiments described above are merely some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, shall fall within the scope of the present application.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the application described herein may be implemented in sequences other than those illustrated or otherwise described herein.
The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (16)
1. An isolated earthing knife-switch, comprising:
the contact assembly (10), the contact assembly (10) comprises a moving contact (11) and a plurality of fixed contacts, the plurality of fixed contacts comprise a feeder fixed contact (12) and a grounding fixed contact (13), the moving contact (11) is movably arranged and is provided with a closing position contacted with the feeder fixed contact (12), a grounding position contacted with the grounding fixed contact (13) and a separating brake position not contacted with the feeder fixed contact (12) and the grounding fixed contact (13);
The mechanism assembly (20) is in driving connection with the contact assembly (10) and can be arranged in a separated mode, the mechanism assembly (20) can drive and control the moving contact (11) to switch between the fixed contacts, the mechanism assembly (20) is positioned in front of the contact assembly (10) and is away from the moving contact (11) of the contact assembly (10) and the right front of the fixed contacts;
the mechanism assembly (20) comprises:
a driving member (22);
a connecting shaft (23) for driving the moving contact (11) to move, wherein the connecting shaft (23) is in driving connection with the driving piece (22);
a drive control switch (24), wherein the drive control switch (24) is electrically connected with the driving piece (22) and can control the starting and stopping of the driving piece (22);
an auxiliary node switch (25), the auxiliary node switch (25) cooperating with an external piece;
a drive control cam (26) for triggering the drive control switch (24), wherein the drive control cam (26) is in drive connection with the connecting shaft (23) and synchronously rotates;
the auxiliary node cam (27) is used for triggering the auxiliary node switch (25), the auxiliary node cam (27) is in driving connection with the connecting shaft (23) and synchronously rotates, the width of the triggering end of the auxiliary node cam (27) is larger than that of the triggering end of the driving control cam (26), so that the action of triggering the auxiliary node switch (25) by the auxiliary node cam (27) is prior to the action of triggering the driving control switch (24) by the driving control cam (26).
2. The isolated earthing knife-switch according to claim 1, wherein the contact assembly (10) further comprises a main mounting plate (14), the moving contact (11) and the stationary contact are both disposed on the main mounting plate (14), the mechanism assembly (20) comprises a secondary mounting plate (21), the main mounting plate (14) and the secondary mounting plate (21) are disposed at parallel intervals, and the moving contact (11) and the stationary contact are located outside the projection range of the secondary mounting plate (21) on the main mounting plate (14).
3. The isolated earthing knife-switch according to claim 2, characterized in that the secondary mounting plate (21) is located in the upper region of the primary mounting plate (14) and above the moving contact (11) and the stationary contact.
4. The isolated earthing knife-switch according to claim 2, characterized in that the surface size of the secondary mounting plate (21) is smaller than the surface size of the primary mounting plate (14).
5. The isolating and grounding disconnecting link according to claim 2, wherein the contact assembly (10) further comprises a main shaft (15), the main shaft (15) is arranged on the main mounting plate (14) in a penetrating manner and is in driving fit with the moving contact (11), the mechanism assembly (20) comprises a driving piece (22) and a connecting shaft (23), the connecting shaft (23) is arranged on the auxiliary mounting plate (21) in a penetrating manner and is in driving connection with the main shaft (15), the driving piece (22) drives the moving contact (11) to rotate through the connecting shaft (23) and the main shaft (15), and the main shaft (15) and the connecting shaft (23) are arranged in a separable manner.
6. The isolated earthing knife-switch according to claim 1, characterized in that the width of the trigger end of the auxiliary node cam (27) is 15-25% greater than the width of the trigger end of the drive control cam (26).
7. The isolated earthing knife-switch according to claim 1, wherein the mechanism assembly (20) comprises a connecting shaft (23) for driving the moving contact (11) to move, a first limiting member (28) and an intermediate limiting assembly (29), wherein the first limiting member (28) is connected with the connecting shaft (23) and rotates synchronously, the first limiting member (28) is provided with a limiting hole (281), the intermediate limiting assembly (29) is provided with a limiting end, when the moving contact (11) is located at the opening position, the limiting hole (281) is aligned with the limiting end, and the limiting end can extend into the limiting hole (281) to keep the moving contact (11) at the opening position.
8. The isolated earthing knife-switch of claim 7, wherein the intermediate limit assembly (29) comprises:
a base (291);
the marble (292) is movably arranged on the base (291) in a penetrating mode, the marble (292) is provided with the limiting end, and the limiting end is arc-shaped and can extend out of the base (291) to extend into the limiting hole (281);
The elastic piece (293), the elastic piece (293) sets up in base (291), the both ends of elastic piece (293) respectively with base (291) with marble (292) butt, and for marble (292) provide stretch into spacing hole (281).
9. The isolated earth knife switch of claim 7, wherein the mechanism assembly (20) further comprises an end stop (210), the end stop (210) being located in the rotational path of the first stop (28), the first stop (28) abutting the end stop (210) to control the range of rotation of the moving contact (11) when the moving contact (11) is rotated to the closed position or the earth position.
10. The isolated earth knife switch according to claim 1, characterized in that the plurality of stationary contacts further comprises an intermediate stationary contact (16), the intermediate stationary contact (16) being located between the feeder stationary contact (12) and the earth stationary contact (13) along a movement trajectory of the moving contact (11), and the moving contact (11) being in contact with the intermediate stationary contact (16) when the moving contact (11) is in the open position.
11. The isolated earthing knife-switch of claim 1, wherein the mechanism assembly (20) comprises:
the connecting shaft (23), the said connecting shaft (23) cooperates with said movable contact (11) drive, and the two rotate synchronously;
a first manual shaft (220), the first manual shaft (220) being in driving connection with the connection shaft (23);
a second manual shaft (230), the second manual shaft (230) being in driving connection with the connecting shaft (23);
the crank (240) can be matched with the first manual shaft (220) or the second manual shaft (230), and the position of the movable contact (11) is switched by the first manual shaft (220) or the second manual shaft (230);
the second limiting piece (250) is connected with the connecting shaft (23) and rotates synchronously, the second limiting piece (250) can shield or avoid the front of the first manual shaft (220) or the second manual shaft (230) so as to prevent or avoid the crank (240) from abutting against the first manual shaft (220) or the second manual shaft (230), when the manual contact (11) is located at the closing position, the second limiting piece (250) is away from the first manual shaft (220) and shields the second manual shaft (230), the crank (240) can be connected with the first manual shaft (220) in a driving mode, and the manual contact (11) is driven to be switched from the closing position to the opening position through the first manual shaft (220); when the movable contact (11) moves to the opening position, the second limiting piece (250) is abutted with the crank (240) and used for preventing the crank (240) from driving the movable contact (11) to rotate continuously, the second limiting piece (250) is prevented from avoiding the second manual shaft (230), the crank (240) can be switched to the second manual shaft (230) by the first manual shaft (220), and the movable contact (11) is driven to be switched to the grounding position by the opening position by the second manual shaft (230).
12. The isolated earthing knife-switch of claim 11, wherein the second limiting member (250) is provided with a first avoidance recess (2501) and a second avoidance recess (2502), the first avoidance recess (2501) is used for avoiding the first manual shaft (220), the second avoidance recess (2502) is used for avoiding the second manual shaft (230), when the moving contact (11) moves to the opening position, a side wall of the first avoidance recess (2501) is abutted to the crank (240) and prevents the moving contact (11) from continuing to rotate, and the second avoidance recess (2502) is aligned with the second manual shaft (230) so that the crank (240) can be switched to the second manual shaft (230) by the first manual shaft (220).
13. The isolated earth knife switch of claim 12, wherein a distance between the first relief recess (2501) and the second relief recess (2502) is equal to a distance between the first manual shaft (220) and the second manual shaft (230).
14. The isolated earthing knife-switch according to claim 11, wherein the second limiting member (250) further comprises a stop portion (2503), and when the crank (240) drives the moving contact (11) to the earthing position, the stop portion (2503) abuts against the crank (240) and prevents the crank (240) from driving the moving contact (11) to rotate continuously.
15. The isolated earthing knife-switch of claim 11, wherein the mechanism assembly (20) further comprises:
a driving member (22);
a speed reducing mechanism (260), wherein the speed reducing mechanism (260) is in driving connection with the driving piece (22);
the transmission mechanism (270), the transmission mechanism (270) is in driving connection with the speed reducing mechanism (260) and the connecting shaft (23), and the driving piece (22) drives the connecting shaft (23) to rotate through the speed reducing mechanism (260) and the transmission mechanism (270).
16. The isolated earthing knife-switch according to claim 1, wherein the contact assembly (10) further comprises:
the movable contact (11) and the fixed contact are arranged on the main mounting plate (14);
the insulator (17) is arranged between the movable contact (11) and the main mounting plate (14), and the insulator (17) is arranged between the fixed contact and the main mounting plate (14);
a main shaft (15), wherein the main shaft (15) is arranged on the main mounting plate (14) in a penetrating way and is in driving fit with the mechanism assembly (20);
the crank connecting rod mechanism comprises a crank (18) and a connecting rod (19), wherein the crank (18) is in driving connection with the main shaft (15) and synchronously rotates, and two ends of the connecting rod (19) are respectively connected with the crank (18) and the moving contact (11) so as to drive the moving contact (11) to rotate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110971060.8A CN113675030B (en) | 2021-08-23 | 2021-08-23 | Isolation grounding disconnecting link |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110971060.8A CN113675030B (en) | 2021-08-23 | 2021-08-23 | Isolation grounding disconnecting link |
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| Publication Number | Publication Date |
|---|---|
| CN113675030A CN113675030A (en) | 2021-11-19 |
| CN113675030B true CN113675030B (en) | 2023-09-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110971060.8A Active CN113675030B (en) | 2021-08-23 | 2021-08-23 | Isolation grounding disconnecting link |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114823207B (en) * | 2022-03-18 | 2023-06-09 | 珠海优特电力科技股份有限公司 | Operating device of three-station disconnecting link switch and three-station disconnecting link switch |
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