CN114420479A - Cable chamber door interlocking structure of upper three-station ring main unit - Google Patents
Cable chamber door interlocking structure of upper three-station ring main unit Download PDFInfo
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- CN114420479A CN114420479A CN202210072578.2A CN202210072578A CN114420479A CN 114420479 A CN114420479 A CN 114420479A CN 202210072578 A CN202210072578 A CN 202210072578A CN 114420479 A CN114420479 A CN 114420479A
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- 230000005540 biological transmission Effects 0.000 claims abstract description 144
- 230000000903 blocking effect Effects 0.000 claims description 40
- 238000000034 method Methods 0.000 claims description 21
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- 230000008569 process Effects 0.000 claims description 18
- 230000001105 regulatory effect Effects 0.000 description 16
- 230000008901 benefit Effects 0.000 description 12
- 238000002955 isolation Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 5
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/20—Interlocking, locking, or latching mechanisms
- H01H9/22—Interlocking, locking, or latching mechanisms for interlocking between casing, cover, or protective shutter and mechanism for operating contacts
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- 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
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- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
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Abstract
The invention provides a cable chamber door interlocking structure of an upper three-station ring main unit, which comprises a grounding interlocking mechanism provided with a grounding interlocking stop block and a circuit breaker interlocking mechanism provided with a circuit breaker interlocking stop block, wherein a first transmission mechanism is arranged between the grounding interlocking stop block and a three-station isolating switch operating mechanism and is used for enabling the grounding interlocking stop block to be provided with an unlocking position corresponding to the grounding state of the three-station isolating switch operating mechanism and a locking position corresponding to the isolating opening and isolating closing states of the three-station isolating switch operating mechanism; a second transmission mechanism is arranged between the circuit breaker interlocking stop block and the circuit breaker operating mechanism and is used for enabling the circuit breaker interlocking stop block to have an unlocking position corresponding to the closing state of the circuit breaker operating mechanism and a locking position corresponding to the opening state of the circuit breaker operating mechanism; the technical problem that the reliability of the interlocking mechanism of the cable chamber door of the upper three-station ring main unit in the prior art is poor is effectively solved.
Description
Technical Field
The invention relates to interlocking between a shell, a cover or a protective cover and an operating mechanism, in particular to an interlocking structure of a cable chamber door of a three-station ring main unit.
Background
Go up three-station looped netowrk cabinet and refer to the looped netowrk cabinet of three-station isolator setting in the top of circuit breaker, when adopting the cabinet body of going up three-station isolator to realize ground connection operation, need go up three-station isolator and be in ground connection state and the circuit breaker is combined floodgate and satisfy simultaneously, according to GB/T3906 standard five-prevention interlocking requirement, only when the cabinet body is in ground connection state, cable chamber door just can be opened, this needs to increase when designing and interlocks cable chamber door interlock and circuit breaker to cable chamber door with three-station isolator. In addition, cable chamber door on the current cabinet body includes articulated cable chamber door and lift-up cable chamber door, and in order to satisfy the arcing requirement, cable chamber door on the cabinet body adopts lift-up cable chamber door more, is equipped with the buckle of L shape on the lift-up cable chamber door for realize the cooperation with the draw-in groove on the cabinet body, need lift cable chamber door earlier when needing to open cable chamber door, make buckle and draw-in groove remove the cooperation, cable chamber door can be opened.
Among the prior art, go up three station isolator to cable chamber door interlocking and circuit breaker to cable chamber door interlocking and realize through the ground connection interlocking device and the circuit breaker interlocking device who separately sets up, ground connection interlocking device is used for realizing the interlocking of three station isolator and cable chamber door, including connecting the epaxial first cam of divide-shut brake indicating and the first ejector pin that corresponds with first cam at last three stations, the lower extreme of first ejector pin corresponds with cable chamber door, first ejector pin upper and lower action when first cam rotates, the realization is spacing to cable chamber door, prevent that cable chamber door from being lifted and opening. The circuit breaker interlocking mechanism is used for realizing the interlocking of circuit breaker and cable chamber door, including setting up at the epaxial second cam of circuit breaker operating mechanism divide-shut brake indication and the second ejector pin that corresponds with the second cam, the lower extreme of second ejector pin corresponds with cable chamber door, and the second ejector pin moves from top to bottom when the second cam rotates, realizes spacing to cable chamber door, prevents that cable chamber door from being lifted and open.
Grounding interlocking device and circuit breaker interlocking device among the prior art are when using, if the maloperation takes place, prevent that the power that cable chamber door was opened when lifting cable chamber door is realized by corresponding ejector pin, because first, second cam and cable chamber door distance are far away, it is first, the length of ejector pin between second cam and the cable chamber door is longer, the radial dimension of ejector pin receives the space restriction of looped netowrk cabinet also more thin, make the ejector pin can take place bending deformation when receiving great lifting force, thereby lead to cable chamber door to be opened by mistake, the reliability is relatively poor.
Disclosure of Invention
The invention aims to provide an interlocking structure of a cable chamber door of a three-station ring main unit, which aims to solve the technical problem that the reliability of an interlocking mechanism of the cable chamber door of the three-station ring main unit in the prior art is poor.
The cable chamber door interlocking structure of the upper three-station ring main unit adopts the following technical scheme:
the cable chamber door interlocking structure of the upper three-station ring main unit comprises a grounding interlocking mechanism and a circuit breaker interlocking mechanism which are respectively used for realizing interlocking between a three-station isolating switch operating mechanism and a cable chamber door and between a circuit breaker operating mechanism and the cable chamber door, wherein the cable chamber door is a lifting cable chamber door, the grounding interlocking mechanism and the circuit breaker interlocking mechanism respectively comprise a locking stop dog which is a grounding interlocking stop dog and a circuit breaker interlocking stop dog, and the grounding interlocking stop dog and the circuit breaker interlocking stop dog are rotatably assembled on the ring main unit; a first transmission mechanism is arranged between the grounding interlocking block and the three-station disconnecting switch operating mechanism, and the first transmission mechanism is used for enabling the grounding interlocking block to act along with the three-station disconnecting switch operating mechanism and is provided with an unlocking position corresponding to the grounding state of the three-station disconnecting switch operating mechanism and a locking position corresponding to the isolating opening and closing states of the three-station disconnecting switch operating mechanism; a second transmission mechanism is arranged between the circuit breaker interlocking stop block and the circuit breaker operating mechanism and is used for enabling the circuit breaker interlocking stop block to act along with the circuit breaker operating mechanism and is provided with an unlocking position corresponding to the closing state of the circuit breaker operating mechanism and a locking position corresponding to the opening state of the circuit breaker operating mechanism; the locking stop block is provided with a blocking part, the blocking part is used for being positioned below the rotating axis of the interlocking stop block when the corresponding interlocking stop block is positioned at the locking position, blocking the cable chamber door or a blocking part fixed on the cable chamber door, and bearing the acting force of the rotating axis of the interlocking stop block to block the opening of the cable chamber door when the cable chamber door is lifted; the blocking part is used for avoiding the cable chamber door or the stopping piece to release the locking of the cable chamber door when the corresponding interlocking block is in the unlocking position.
Has the advantages that: when the cable chamber door interlocking structure of the upper three-station ring main unit is used, when the grounding interlocking stop block and the breaker interlocking stop block are positioned at the locking positions, the blocking part on the interlocking stop block is positioned below the rotating axis of the interlocking stop block and blocks on the cable chamber door or the blocking part fixed on the cable chamber door, and the acting force of the rotating axis of the interlocking stop block is borne when the cable chamber door is lifted.
Furthermore, the bottommost side face of the locking stop block is an arc-shaped face, the blocking portion is located on the arc-shaped face, and the rotation axis of the arc-shaped face is parallel to the rotation axis of the locking stop block.
Has the advantages that: when the locking stop block is swung to complete the switching between the unlocking position and the locking position, a certain gap needs to be kept between the blocking part and the corresponding blocking position on the cable chamber door, so that the locking stop block can swing smoothly, the blocking part is positioned on the arc-shaped surface, the gap between the blocking part and the corresponding blocking position on the cable chamber door can be reduced, and the phenomenon that the gap is too large so as to influence the blocking effect is avoided; the rotation axis of the arc-shaped surface is parallel to the rotation axis of the locking stop block, so that the interlocking stop block can swing more smoothly.
Further, the grounding interlocking block and the circuit breaker interlocking block are rotatably assembled on the same rotating shaft.
Has the advantages that: the grounding interlocking block and the circuit breaker interlocking block are rotatably assembled on the same rotating shaft, so that the structural arrangement of the grounding interlocking mechanism and the circuit breaker interlocking mechanism can be reduced, the number of corresponding parts is reduced, and the structural arrangement of the grounding interlocking mechanism and the circuit breaker interlocking mechanism is facilitated; on the other hand, the arrangement of the grounding interlocking block and the circuit breaker interlocking block is more compact, and the installation space can be saved.
Furthermore, first drive mechanism is including articulating ground connection transmission connecting rod on the ground connection interlocking dog, and second drive mechanism is including articulating the circuit breaker transmission connecting rod on the circuit breaker interlocking dog, and the both ends of ground connection transmission connecting rod and circuit breaker transmission connecting rod all are equipped with hinge structure for form link mechanism in order to realize the drive of ground connection interlocking dog and circuit breaker interlocking dog.
Has the advantages that: the connecting rod transmission mechanism is convenient to design, simple in structure and stable in transmission.
Further, the ground interlock block and the circuit breaker interlock block each include two side arms arranged in an L-shape; the hinged part of the grounding interlocking block and the corresponding connecting rod and the blocking part of the grounding interlocking block are respectively positioned on two side arms of the grounding interlocking block, and the hinged part of the breaker interlocking block and the corresponding connecting rod and the blocking part of the breaker interlocking block are respectively positioned on two side arms of the breaker interlocking block.
Has the advantages that: the structure of the grounding interlocking stop block and the circuit breaker interlocking stop block is adopted, so that the connection of the corresponding transmission connecting rods is facilitated, a longer driving force arm can be formed, the connection position of the transmission connecting rods is flexibly set, and the corresponding transmission mechanism can be more smooth when the grounding interlocking stop block and the circuit breaker interlocking stop block are driven to rotate.
Furthermore, the hinged part of the grounding interlocking block and the corresponding connecting rod and the hinged part of the breaker interlocking block and the corresponding connecting rod are oppositely arranged on two sides of the rotation axis of the locking block.
Has the advantages that: the arrangement can prevent the corresponding connecting rods of the first transmission mechanism and the second transmission mechanism from interfering during action, and is beneficial to ensuring the stability of the interlocking structure.
Further, cable chamber door interlocking structure still includes the regulating block that sets up at the at least one end of ground connection transmission connecting rod and/or circuit breaker transmission connecting rod, be equipped with the connecting rod perforation on the regulating block, ground connection transmission connecting rod and/or circuit breaker transmission connecting rod pass and have two adjusting nut on it from the connecting rod perforation, two adjusting nut set up respectively at the fenestrate both ends of connecting rod, be used for making regulating block and corresponding ground connection transmission connecting rod or circuit breaker transmission connecting rod fixed, be equipped with hinge structure on the regulating block, hinge structure is used for realizing the articulated of the corresponding end of ground connection transmission connecting rod and/or circuit breaker transmission connecting rod.
Has the advantages that: the transmission connecting rod is hinged through the adjusting block, so that the transmission connecting rod can be conveniently installed; in addition, the positions of the adjusting blocks on the transmission connecting rod can be determined by adjusting the positions of the two adjusting nuts of the transmission connecting rod, when assembly errors occur, the transmission length of the transmission connecting rod can be adjusted according to assembly requirements, and the assembly efficiency is effectively improved.
Furthermore, the first transmission mechanism comprises a grounding interlocking swing arm hinged on the ring main unit, and two ends of the grounding transmission connecting rod are respectively hinged with the grounding interlocking swing arm and the grounding interlocking stop block; the first transmission mechanism further comprises a swing arm limiting structure, and the swing arm limiting structure is used for limiting the swing position of the grounding interlocking swing arm under the action of the reset spring to correspond to the locking position of the grounding interlocking stop block; the first transmission mechanism further comprises a poking piece fixed on a switching-on and switching-off indicating shaft or a switching-on and switching-off operating shaft of the three-station isolating switch operating mechanism, the poking piece is used for poking the grounding interlocking swing arm to drive the grounding interlocking stop block to rotate to an unlocking position in the grounding action process of the three-station isolating switch operating mechanism, and the poking piece and the grounding interlocking swing arm are separated from each other when the three-station isolating switch operating mechanism conducts isolating switching-on and switching-off.
Has the advantages that: because the reset spring and the grounding interlocking swing arm are relatively independent from the three-station isolating switch operating mechanism, after the matching relation between the shifting piece and the grounding interlocking swing arm is released, the reset spring is matched with the swing arm limiting structure, the grounding interlocking swing arm can be kept at a locking position during isolation switching-on and isolation switching-off, and the grounding interlocking swing arm is rotated to an unlocking position through the shifting piece only when the three-station isolating switch operating mechanism is grounded, so that the corresponding relation between three working positions of the three-station switch operating mechanism and two swinging positions of the grounding interlocking swing arm can be met.
Furthermore, the poking part comprises a poking plate fixed on the opening and closing indicating shaft, and a poking pin shaft used for poking the grounding interlocking swing arm is arranged on the end face of the poking plate.
Has the advantages that: the poking piece adopts the structure, so that the original poking plate on the opening and closing indicating shaft is utilized, only one poking pin shaft needs to be arranged during installation, and the installation is very convenient.
Furthermore, the second transmission mechanism comprises a circuit breaker interlocking connecting lever, the circuit breaker interlocking connecting lever is in transmission connection with a switching-off and switching-on indicating shaft or a switching-off and switching-on operating shaft of the circuit breaker operating mechanism, two ends of a circuit breaker transmission connecting rod are respectively hinged with the circuit breaker interlocking connecting lever and a circuit breaker interlocking stop block, the circuit breaker interlocking connecting lever is used for driving the circuit breaker interlocking stop block to rotate to an unlocking position through the circuit breaker transmission connecting rod in the switching-on action process of the circuit breaker operating mechanism, and the circuit breaker interlocking stop block is driven to rotate to the locking position through the circuit breaker transmission connecting rod in the switching-off action process of the circuit breaker operating mechanism.
Has the advantages that: because the circuit breaker interlocking stop dog only needs to correspond with the closing state of circuit breaker operating mechanism when being in the position of unblock, the circuit breaker interlocking stop dog only needs to correspond with the separating brake state of circuit breaker operating mechanism when being in the locking position, and the corresponding relation is simple relatively, and second drive mechanism adopts this kind of structure of circuit breaker transmission connecting rod and circuit breaker interlocking turning arm, can guarantee that the transmission is stable, and this kind of structure is also simple relatively simultaneously, convenient equipment.
Drawings
Fig. 1 is a schematic diagram of a first state of a cable chamber door interlocking structure of an upper three-station ring main unit provided by the invention;
fig. 2 is a schematic diagram of a second state of the cable chamber door interlocking structure of the upper three-station ring main unit provided by the invention;
fig. 3 is a schematic diagram of a third state of the cable chamber door interlocking structure of the upper three-station ring main unit provided by the invention;
FIG. 4 is a schematic view of the assembly of the ground interlock stop and circuit breaker interlock block with the stop shaft;
FIG. 5 is a schematic diagram of the mating of the toggle pin and the ground interlock swing arm;
fig. 6 is an assembly schematic diagram of the cable chamber door interlocking structure of the upper three-station ring main unit provided by the invention on the ring main unit.
The names of the components corresponding to the corresponding reference numerals in the drawings are:
1. a ring main unit; 11. a three-station opening and closing indicating shaft; 12. a stopper rotating shaft; 13. a cable chamber door; 14. a stopper; 15. a circuit breaker opening and closing indicating shaft; 16. a three-position isolating switch operating mechanism; 17. a circuit breaker operating mechanism; 18. a circuit breaker opening and closing indicating shaft; 19. a U-shaped mounting seat; 2. a first transmission mechanism; 21. a dial; 22. shifting the pin shaft; 23. a grounding interlocking swing arm; 231. turning over edges; 24. a swing arm limit shaft; 25. a return spring; 26. a ground drive link; 27. a ground interlock stop; 28. an upper grounding adjustment block; 29. the lower grounding adjusting block; 3. a second transmission mechanism; 31. a breaker interlock lever; 32. a circuit breaker drive link; 33. an upper breaker adjustment block; 34. a lower breaker adjustment block; 35. breaker interlocking dog.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It is to be noted that, in the embodiments of the present invention, relational terms such as "first" and "second", and the like, which may be present in the terms of the first and second, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, terms such as "comprises," "comprising," or any other variation thereof, which may be present, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the appearances of the phrase "comprising an … …" or similar limitation may be present without necessarily excluding the presence of additional identical elements in the process, method, article, or apparatus that comprises the same elements.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" when they are used are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.
In the description of the present invention, unless otherwise specifically stated or limited, the term "provided" may be used in a broad sense, for example, the object of "provided" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be detachable or non-detachable. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.
The present invention will be described in further detail with reference to examples.
Embodiment 1 of the cable chamber door interlocking structure of the upper three-station ring main unit in the invention:
as shown in fig. 1 to 6, the cable chamber door interlocking structure of the upper three-station ring main unit provided in this embodiment is arranged on the ring main unit 1, the ring main unit 1 is provided with a circuit breaker operating mechanism 17, a three-station disconnecting switch operating mechanism 16 and a cable chamber door 13, the cable chamber door 13 is an up-lifting cable chamber door, the three-station disconnecting switch operating mechanism 16 is located above the circuit breaker operating mechanism 17, the cable chamber door interlocking structure of the upper three-station ring main unit includes a grounding interlocking mechanism and a circuit breaker interlocking mechanism, both the grounding interlocking mechanism and the circuit breaker interlocking mechanism include a locking stopper, the grounding interlocking mechanism realizes interlocking between the three-station disconnecting switch operating mechanism 16 and the cable chamber door 13 through the corresponding locking stopper, and the circuit breaker interlocking mechanism realizes interlocking between the circuit breaker operating mechanism 17 and the cable chamber door 13 through the corresponding locking stopper.
Specifically, the locking stopper on the grounding interlocking mechanism is a grounding interlocking stopper 27, the locking stopper on the circuit breaker interlocking mechanism is a circuit breaker interlocking stopper 35, and the cable chamber door 13 is provided with a stopper 14, as shown in fig. 4, the stopper rotating shaft 12 is installed on a U-shaped installation base 19 with a downward opening, and the U-shaped installation base 19 is located on the ring main unit 1. And the grounding interlocking block 27 and the breaker interlocking block 35 are rotatably assembled on the block rotating shaft 12, and the rotating axes of the grounding interlocking block 27 and the breaker interlocking block 35 are superposed. A first transmission mechanism 2 is arranged between the grounding interlocking block 27 and the three-position disconnecting switch operating mechanism 16, the three-position disconnecting switch operating mechanism 16 enables the grounding interlocking block 27 to act along with the three-position disconnecting switch operating mechanism 16 through the first transmission mechanism 2, and the three-position disconnecting switch operating mechanism 16 is provided with an unlocking position corresponding to the grounding state of the three-position disconnecting switch operating mechanism 16 and a locking position corresponding to the isolation opening and isolation closing states of the three-position disconnecting switch operating mechanism 16. The second transmission mechanism 3 is arranged between the circuit breaker interlocking block 35 and the circuit breaker operating mechanism 17, and the circuit breaker operating mechanism 17 enables the circuit breaker interlocking block 35 to act along with the circuit breaker operating mechanism 17 through the second transmission mechanism 3 and is provided with an unlocking position corresponding to the closing state of the circuit breaker operating mechanism 17 and a locking position corresponding to the opening state of the circuit breaker operating mechanism 17.
In this embodiment, as shown in fig. 2, the first transmission mechanism 2 includes a grounding interlocking swing arm 23 and a grounding transmission link 26, the middle portion of the grounding interlocking swing arm 23 is hinged to the ring main unit 1, a shifting side matched with the three-position disconnecting switch operating mechanism 16 is arranged on the grounding interlocking swing arm 23, a turning edge 231 is arranged at the shifting side, and the grounding interlocking swing arm 23 is further connected with a return spring 25. In addition, the first transmission mechanism 2 further includes a swing arm limiting structure, and the swing arm limiting structure is a swing arm limiting shaft 24. Correspondingly, the three-position isolating switch operating mechanism 16 is provided with a three-position opening and closing indicating shaft 11, a driving plate 21 is fixed on the three-position opening and closing indicating shaft 11, a driving pin 22 is arranged on the end face of the driving plate 21, and the driving plate 21 and the driving pin 22 are jointly used as a driving part for driving the grounding interlocking swing arm 23. The earth interlocking swing arm 23 and the earth interlocking stopper 27 are connected by an earth transmission link 26.
In this embodiment, as shown in fig. 2, in the process that the three-position disconnecting switch operating mechanism 16 moves to the grounding state, the three-position switching-closing indicating shaft 11 drives the driving plate 21 to rotate, as shown in fig. 5, the driving pin 22 on the driving plate 21 is in pushing contact with the turned edge 231 on the grounding interlocking swing arm 23, and drives the grounding interlocking swing arm 23 to swing clockwise, so that the end of the grounding interlocking swing arm 23 hinged to the grounding transmission link 26 swings upward to drive the grounding transmission link 26 to move upward, the grounding transmission link 26 drives the grounding interlocking block 27 to rotate around the block rotating shaft 12, at this time, the return spring 25 is in the extended power accumulation state, the blocking portion on the grounding interlocking block 27 and the block 14 on the cable chamber door 13 are avoided in the up-down direction, and at this time, the grounding interlocking block 27 is in the unlocking position. As shown in fig. 1, during the process of the isolation opening and closing state to which the three-position isolation switch operating mechanism 16 operates, the three-position opening and closing indicating shaft 11 drives the driving plate 21 to rotate, the driving pin 22 on the driving plate 21 does not contact with the grounding interlocking swing arm 23, the return spring 25 pulls the grounding interlocking swing arm 23 to enable the grounding interlocking swing arm 23 to swing counterclockwise to the position of blocking and contacting with the swing arm limiting shaft 24, during the swinging process, the hinged end of the grounding interlocking swing arm 23 and the grounding transmission connecting rod 26 swings downward to drive the grounding transmission connecting rod 26 to move downward, the grounding transmission connecting rod 26 drives the grounding interlocking block 27 to rotate around the block rotating shaft 12, the blocking portion on the grounding interlocking block 27 is located below the block rotating shaft 12 and is blocked on the upward path on the blocking member 14 on the cable chamber door 13 to form blocking and matching with the blocking member 14 on the cable chamber door 13 in the upward and downward directions, the cable chamber door 13 is lifted upward and the stopper 14 abuttingly interlocks the stopper portion of the stopper 27 with a force passing through the stopper hinge 12.
In this embodiment, as shown in fig. 1 to 4, in order to facilitate the assembly of the grounding transmission link 26, as shown in fig. 1 and 2, the grounding transmission link 26 is hinged to the grounding interlocking swing arm 23 and the grounding interlocking stopper 27 through a grounding adjustment block, the grounding adjustment block is divided into an upper grounding adjustment block 28 and a lower grounding adjustment block 29, the upper grounding adjustment block 28 is disposed at the upper end of the grounding transmission link 26, and the lower grounding adjustment block 29 is disposed at the lower end of the grounding transmission link 26. Specifically, the upper grounding adjustment block 28 and the lower grounding adjustment block 29 are both provided with a connection through hole, the upper end and the lower end of the grounding transmission connecting rod 26 respectively penetrate through the connection through holes on the upper grounding adjustment block 28 and the lower grounding adjustment block 29, the upper end and the lower end of the grounding transmission connecting rod 26 are both provided with external threads, and the external threads on the upper end and the lower end of the grounding transmission connecting rod 26 are both provided with two adjustment nuts (not shown), the two adjustment nuts arranged at the upper end of the grounding transmission connecting rod 26 are respectively located at two sides of the connection through hole of the upper grounding adjustment block 28, so that the upper grounding adjustment block 28 is fixed at the upper end of the grounding transmission connecting rod 26. Two adjusting nuts arranged at the lower end of the grounding transmission connecting rod 26 are respectively positioned at two sides of the connecting through hole of the lower grounding adjusting block 29, so that the lower grounding adjusting block 29 is fixed at the lower end of the grounding transmission connecting rod 26. In addition, the upper grounding adjusting block 28 and the lower grounding adjusting block 29 are both provided with a hinge structure, the upper grounding adjusting block 28 is hinged with the corresponding end of the grounding interlocking swing arm 23 through the hinge structure of the upper grounding adjusting block, and the lower grounding adjusting block 29 is hinged with the grounding interlocking block 27 through the hinge structure of the lower grounding adjusting block. Because the grounding interlocking mechanism has errors during assembly, the arrangement has the advantage that the transmission length of the grounding transmission connecting rod 26 can be conveniently adjusted by adjusting the position of the adjusting nut on the grounding transmission connecting rod 26 according to the assembly condition. In addition, to facilitate the driving of the swing of the ground interlocking block 27, as shown in fig. 4, the ground interlocking block 27 includes two side arms arranged in an L shape, one of the side arms is hinged to the lower ground adjusting block 29, and the bottom side surface of the other side arm is an arc surface which forms a blocking part of the ground interlocking block 27, the rotation axis of the arc surface is parallel to the rotation axis of the ground interlocking block 27, and the junction of the two side arms is hinged to the crank rotating shaft 12.
In this embodiment, as shown in fig. 2 and fig. 3, the second transmission mechanism 3 includes a breaker interlocking connecting lever 31, the breaker operating mechanism 17 is provided with a breaker opening and closing indicating shaft 18, the breaker interlocking connecting lever 31 is in transmission connection with the breaker opening and closing indicating shaft 18, a breaker transmission link 32 is arranged between the breaker interlocking connecting lever 31 and the breaker interlocking stopper 35, and two ends of the breaker transmission link 32 are respectively hinged to the breaker interlocking connecting lever 31 and the breaker interlocking stopper 35. As shown in fig. 3, in the process that the circuit breaker operating mechanism 17 moves to the closing position, the circuit breaker opening and closing indicating shaft 18 rotates clockwise to drive the circuit breaker interlocking connecting lever 31 to swing, so that the hinged ends of the circuit breaker interlocking connecting lever 31 and the circuit breaker transmission link 32 swing upward, the circuit breaker transmission link 32 drives the circuit breaker interlocking stopper 35 to rotate around the stopper rotating shaft 12, the blocking portion on the circuit breaker interlocking stopper 35 and the stopper 14 on the cable chamber door 13 avoid in the up-down direction, and at this time, the circuit breaker interlocking stopper 35 is in the unlocking position. As shown in fig. 2 and 3, in the process that the circuit breaker operating mechanism 17 operates to the opening state, the circuit breaker opening and closing indicating shaft 18 rotates counterclockwise to drive the circuit breaker interlocking connecting lever 31 to swing, so that the circuit breaker interlocking connecting lever 31 and the hinged end of the circuit breaker transmission link 32 swing downward, the circuit breaker transmission link 32 moves downward, the circuit breaker transmission link 32 drives the circuit breaker interlocking stopper 35 to rotate around the stopper rotating shaft 12, so that the blocking portion on the circuit breaker interlocking stopper 35 is located below the stopper rotating shaft 12 and is prevented from moving upward on the upward path of the stopper 14 on the cable chamber door 13, and forms a blocking fit with the stopper 14 on the cable chamber door 13 in the upward and downward directions, and the cable chamber door 13 is lifted upward, and the acting force of the stopper 14 on the blocking portion on the circuit breaker interlocking stopper 35 passes through the stopper rotating shaft 12.
In this embodiment, as shown in fig. 1 to 4, for the equipment of making things convenient for circuit breaker transmission connecting rod 32, it is articulated through the circuit breaker regulating block all between circuit breaker transmission connecting rod 32 and circuit breaker interlocking connecting lever 31 and the circuit breaker interlocking dog 35, the circuit breaker regulating block divide into last circuit breaker regulating block 33 and lower circuit breaker regulating block 34, goes up circuit breaker regulating block 33 and sets up the upper end at circuit breaker transmission connecting rod 32, lower circuit breaker regulating block 34 sets up the lower extreme at circuit breaker transmission connecting rod 32. Specifically, all be equipped with on last circuit breaker regulating block 33 and the lower circuit breaker regulating block 34 and connect the perforation, the upper and lower both ends of circuit breaker transmission connecting rod 32 pass the connection perforation on last circuit breaker regulating block 33 and the lower circuit breaker regulating block 34 respectively, the upper and lower both ends department of circuit breaker transmission connecting rod 32 all is equipped with the external screw thread, and the external screw thread department at the upper and lower both ends of circuit breaker transmission connecting rod 32 all is equipped with two adjusting nut (the department in the figure), two adjusting nut that set up in circuit breaker transmission connecting rod 32 upper end are located the perforated both sides of connection of last circuit breaker regulating block 33 respectively, make and go up circuit breaker regulating block 33 and fix the upper end at circuit breaker transmission connecting rod 32. Two adjusting nuts arranged at the lower end of the circuit breaker transmission connecting rod 32 are respectively positioned at two sides of the connecting through hole of the lower circuit breaker adjusting block 34, so that the lower circuit breaker adjusting block 34 is fixed at the lower end of the circuit breaker transmission connecting rod 32. In addition, the upper breaker adjusting block 33 and the lower breaker adjusting block 34 are both provided with a hinge structure, the upper breaker adjusting block 28 is hinged with the corresponding end of the breaker interlocking crank arm 31 through the hinge structure of the upper breaker adjusting block, and the lower breaker adjusting block 29 is hinged with the breaker interlocking stop 35 through the hinge structure of the lower breaker adjusting block.
In addition, in order to facilitate driving the swing of the circuit breaker interlocking block, as shown in fig. 4, the circuit breaker interlocking block 35 includes two side arms arranged in an L shape, one of the two side arms is hinged to the lower circuit breaker adjusting block 34, the bottom side surface of the other side arm is an arc surface, the arc surface forms a blocking portion of the circuit breaker interlocking block 35, the rotation axis of the arc surface is parallel to the rotation axis of the circuit breaker locking block, and the intersection of the two side arms is hinged to the connecting lever rotating shaft 12.
In this embodiment, in order to avoid interference between the ground interlock mechanism and the circuit breaker interlock mechanism, when the ground interlock stopper 27 and the circuit breaker interlock stopper 35 are rotatably assembled to the stopper rotating shaft 12, the hinge point of the ground interlock stopper 27 and the ground transmission link 26 and the hinge point of the circuit breaker interlock stopper 35 and the circuit breaker transmission link 32 are disposed at both sides of the stopper rotating shaft 12, respectively. When it is particularly emphasized that, in the cable chamber door interlocking structure of the upper three-position ring main unit provided in this embodiment, as shown in fig. 4, the cable chamber door 14 can be normally opened upward only when the grounding interlocking block 27 and the breaker interlocking block 35 are simultaneously located at the corresponding unlocking positions.
the difference between this embodiment and embodiment 1 is that, in embodiment 1, the first transmission mechanism includes a ground interlock swing arm, a ground transmission link, a ground interlock stopper, and a return spring and a swing arm limiting structure. In the embodiment, the first transmission mechanism comprises a grounding interlocking top wheel, an interlocking limit top rod and a reset spring, the grounding interlocking top wheel is assembled on a switching-on and switching-off indicating shaft of the three-station isolating switch operating mechanism in a linkage manner, the interlocking limit rod is assembled on the ring main unit in a guiding and moving manner along the up-down direction, the upper end of the interlocking limit rod is matched with the grounding interlocking cam, the lower end of the interlocking limit rod is hinged with a grounding interlocking stop block, the peripheral surface of the grounding interlocking top wheel comprises an arc section and a diameter gradual change section, the arc section corresponding to switching-on and switching-off and the diameter gradual change section corresponding to a grounding stroke are isolated, the three-station isolating switch operating mechanism drives the arc section on the grounding interlocking top wheel to be in pushing fit with the interlocking limit rod in the action process of switching-off or switching-on, make the interlocking gag lever post descend, reset spring is compressed, and the interlocking gag lever post drives ground connection interlocking dog and rotates to the locking position, carries out the locking to cable chamber door. In the action process of grounding of the three-station isolating switch operating mechanism, the diameter gradual change section on the grounding interlocking top wheel is in contact with the upper end of the interlocking limiting rod, when the three-station isolating switch operating mechanism acts to the grounding position, the diameter gradual change section is released from the upper end of the interlocking limiting rod, the interlocking limiting rod moves upwards under the action of a reset spring, and the interlocking limiting rod drives the grounding interlocking stop block to rotate to the unlocking position to unlock the cable chamber door.
Embodiment 3 of the cable chamber door interlocking structure of the upper three-station ring main unit in the present invention:
the present embodiment is different from embodiment 1 in that in embodiment 1, the second transmission mechanism includes a breaker interlock lever and a breaker transmission link. In the embodiment, the second transmission mechanism comprises a circuit breaker interlocking cam, an interlocking limiting rod and a reset spring, the circuit breaker interlocking cam is assembled on a switching-on and switching-off indicating shaft or a switching-on and switching-off operating shaft of the circuit breaker operating mechanism in a linkage manner, the interlocking limiting rod is assembled on the ring main unit in a guiding manner along the vertical direction, the upper end of the interlocking limiting rod is matched with the circuit breaker interlocking cam, and the lower end of the interlocking limiting rod is hinged with a circuit breaker interlocking stop block; the circuit breaker operating mechanism drives the convex part on the circuit breaker interlocking cam to push the interlocking limiting rod to move downwards in the opening action process, so that the reset spring is compressed, the circuit breaker limiting rod drives the grounding interlocking stop block to rotate to the locking position, and the cable chamber door is locked. The circuit breaker operating mechanism drives the protruding part on the circuit breaker interlocking cam to be disengaged from the interlocking limiting rod in the closing action process, the interlocking limiting rod moves upwards under the action of the reset spring, and the circuit breaker limiting rod drives the grounding interlocking stop block to rotate to an unlocking position to unlock a cable chamber door.
Embodiment 4 of the cable chamber door interlocking structure of the upper three-station ring main unit in the present invention:
this embodiment is different from embodiment 1 in that embodiment 1, the ground interlock stopper and the breaker interlock stopper are assembled on the same rotating shaft. In this embodiment, the ground interlock block and the breaker interlock block are mounted on two different shafts, and the axes of the two shafts are overlapped.
Embodiment 5 of the cable chamber door interlocking structure of the upper three-station ring main unit in the present invention:
the present embodiment is different from embodiment 1 in that, in embodiment 1, each of the ground interlock block and the breaker interlock block includes two side arms arranged in an L-shape. In the embodiment, the grounding interlocking block and the circuit breaker interlocking block are of a triangular structure as a whole, the hinged part of the grounding interlocking block and the corresponding connecting rod and the blocking part of the grounding interlocking block are respectively positioned at two vertexes of the grounding interlocking block, and the grounding interlocking block is rotatably assembled on the block rotating shaft through the rest vertexes; the hinged position of the circuit breaker interlocking stop dog and the corresponding connecting rod and the blocking part of the circuit breaker interlocking stop dog are respectively positioned at two vertex points on the circuit breaker interlocking stop dog, and the circuit breaker interlocking stop dog is rotatably assembled on the stop dog rotating shaft through the residual vertex points.
Embodiment 6 of the cable chamber door interlocking structure of the upper three-station ring main unit in the present invention:
the present embodiment is different from embodiment 1 in that, in embodiment 1, each of the ground interlock block and the breaker interlock block includes two side arms arranged in an L shape, one of the side arms is hinged to the corresponding transmission link, and the other side arm is hinged to the corresponding interlock block. In this embodiment, the ground interlock stop and the breaker interlock stop each include only one side arm that is hinged to both the corresponding drive link and the corresponding interlock stop.
Embodiment 7 of the cable chamber door interlocking structure of the upper three-station ring main unit in the present invention:
the difference between this embodiment and embodiment 1 is that, in embodiment 1, both ends of the ground transmission link and the breaker transmission link are provided with adjusting blocks, and the positions of the adjusting blocks at the corresponding transmission links can be adjusted to complete the adjustment of the transmission lengths of the corresponding transmission links. In this embodiment, only one end of the ground transmission connecting rod and the circuit breaker transmission connecting rod is provided with the adjusting block, the end which is not provided with the adjusting block is provided with the hinge structure, the position of the adjusting block on the transmission connecting rod is adjustable, and the adjustment of the transmission length of the corresponding transmission connecting rod can be completed only by adjusting the adjusting block at one end. In other embodiments, adjusting blocks are arranged at two ends of the grounding transmission connecting rod and the circuit breaker transmission connecting rod, the adjusting blocks are fixed at the positions of the transmission connecting rods, and the transmission lengths of the transmission connecting rods are correspondingly fixed.
Embodiment 8 of the cable chamber door interlocking structure of the upper three-station ring main unit in the present invention:
the difference between the embodiment and the embodiment 1 is that in the embodiment 1, the toggle element is fixed on the opening and closing indication shaft of the three-position disconnecting switch operating mechanism. In this embodiment, the toggle member is fixed on the opening and closing operation shaft of the three-position disconnecting switch operating mechanism.
Embodiment 9 of the cable chamber door interlocking structure of the upper three-station ring main unit in the present invention:
the present embodiment is different from embodiment 1 in that, in embodiment 1, the dial member includes a dial and a dial pin. In this embodiment, the toggle member is a toggle arm, and the toggle arm is directly fixed on the opening/closing indication shaft.
Embodiment 10 of the cable chamber door interlocking structure of the upper three-station ring main unit in the present invention:
the difference between the present embodiment and embodiment 1 is that in embodiment 1, the circuit breaker interlocking crank arm is in transmission connection with the opening and closing indication shaft of the circuit breaker operating mechanism. In other embodiments, the circuit breaker interlocking crank arm is in transmission connection with the switching-on/off operating shaft of the circuit breaker operating mechanism.
the difference between this embodiment and embodiment 1 is that in embodiment 1, the ground interlock block and the breaker interlock block the stopper on the cable chamber door when in the locked position. In this embodiment, the cable chamber door is not provided with a blocking member, and when the ground interlock stopper and the breaker interlock stopper are at the locking position, the blocking portions of the ground interlock stopper and the breaker interlock stopper are located above the cable chamber door to directly block the cable chamber door.
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention, the scope of the present invention is defined by the appended claims, and all structural changes that can be made by using the contents of the description and the drawings of the present invention are intended to be embraced therein.
Claims (10)
1. A cable chamber door interlocking structure of an upper three-station ring main unit comprises a grounding interlocking mechanism and a circuit breaker interlocking mechanism which are respectively used for realizing interlocking between a three-station isolating switch operating mechanism (16) and a cable chamber door (13) and between a circuit breaker operating mechanism (17) and the cable chamber door (13), wherein the cable chamber door (13) is a lifting cable chamber door, and the cable chamber door interlocking structure is characterized in that the grounding interlocking mechanism and the circuit breaker interlocking mechanism respectively comprise a locking stop dog which is a grounding interlocking stop dog (27) and a circuit breaker interlocking stop dog (35), and the grounding interlocking stop dog (27) and the circuit breaker interlocking stop dog (35) are rotatably assembled on the ring main unit (1); a first transmission mechanism (2) is arranged between the grounding interlocking block (27) and the three-position disconnecting switch operating mechanism (16), and the first transmission mechanism (2) is used for enabling the grounding interlocking block (27) to act along with the three-position disconnecting switch operating mechanism (16) and is provided with an unlocking position corresponding to the grounding state of the three-position disconnecting switch operating mechanism (16) and a locking position corresponding to the disconnecting switching-on state and the disconnecting switching-on state of the three-position disconnecting switch operating mechanism (16); a second transmission mechanism (3) is arranged between the circuit breaker interlocking stop block (35) and the circuit breaker operating mechanism (17), and the second transmission mechanism (3) is used for enabling the circuit breaker interlocking stop block (35) to act along with the circuit breaker operating mechanism (17) and is provided with an unlocking position corresponding to the closing state of the circuit breaker operating mechanism (17) and a locking position corresponding to the opening state of the circuit breaker operating mechanism (17); the locking stop blocks are provided with blocking parts, the blocking parts are used for being positioned below the rotating axes of the locking stop blocks when the corresponding locking stop blocks are positioned at the locking positions, blocking the locking stop blocks on the cable chamber door (13) or a blocking piece (14) fixed on the cable chamber door (13), and bearing the acting force passing through the rotating axes of the locking stop blocks when the cable chamber door (13) is lifted so as to block the opening of the cable chamber door (13); when the corresponding interlocking stop is in the unlocking position, the blocking part is used for avoiding the cable chamber door (13) or the stopping piece (14) to release the locking of the cable chamber door (13).
2. The interlocking structure of the cable chamber door of the upper three-station ring main unit according to claim 1, wherein the bottommost side surface of the locking stopper is an arc-shaped surface, the blocking portion is located on the arc-shaped surface, and a rotation axis of the arc-shaped surface is parallel to a rotation axis of the locking stopper.
3. The interlocking structure of the cable chamber door of the ring main unit with the upper three stations as claimed in claim 1, wherein the grounding interlocking block (27) and the breaker interlocking block (35) are rotatably assembled on the same rotating shaft.
4. The cable chamber door interlocking structure of the upper three-station ring main unit as claimed in any one of claims 1 to 3, wherein the first transmission mechanism (2) comprises a grounding transmission link (26) hinged on the grounding interlocking block (27), the second transmission mechanism (3) comprises a circuit breaker transmission link (32) hinged on the circuit breaker interlocking block (35), and both ends of the grounding transmission link (26) and the circuit breaker transmission link (32) are provided with hinged structures for forming a link mechanism to realize driving of the grounding interlocking block (27) and the circuit breaker interlocking block (35).
5. The cable chamber door interlocking structure of the upper three-position ring main unit as claimed in claim 4, wherein the ground interlocking block (27) and the breaker interlocking block (35) each comprise two side arms arranged in an L shape; the hinged part of the grounding interlocking block (27) and the corresponding connecting rod and the blocking part of the grounding interlocking block (27) are respectively positioned on two side arms on the grounding interlocking block (27), and the hinged part of the circuit breaker interlocking block (35) and the corresponding connecting rod and the blocking part of the circuit breaker interlocking block (35) are respectively positioned on two side arms of the circuit breaker interlocking block (35).
6. The interlocking structure of the cable chamber door of the upper three-station ring main unit as claimed in claim 5, wherein the hinged part of the grounding interlocking block (27) and the corresponding connecting rod and the hinged part of the breaker interlocking block (35) and the corresponding connecting rod are oppositely arranged at two sides of the rotation axis of the locking block.
7. The interlocking structure of the cable chamber door of the upper three-station ring main unit according to claim 4, wherein the interlocking structure of the cable chamber door further comprises an adjusting block arranged at least one end of the grounding transmission connecting rod (26) and/or the breaker transmission connecting rod (32), the adjusting block is provided with a connecting rod through hole, the grounding transmission connecting rod (26) and/or the breaker transmission connecting rod (32) passes through the connecting rod through hole and is in threaded connection with two adjusting nuts, the two adjusting nuts are respectively arranged at two ends of the connecting rod through hole and are used for fixing the adjusting block with the corresponding grounding transmission connecting rod (26) or the breaker transmission connecting rod (32), the adjusting block is provided with a hinge structure, and the hinge structure is used for realizing the hinge connection of the corresponding ends of the grounding transmission connecting rod (26) and/or the breaker transmission connecting rod (32).
8. The cable chamber door interlocking structure of the upper three-station ring main unit as claimed in claim 4, wherein the first transmission mechanism (2) comprises a grounding interlocking swing arm (23) hinged on the ring main unit (1), and two ends of a grounding transmission connecting rod (26) are respectively hinged with the grounding interlocking swing arm (23) and a grounding interlocking stop block (27); the grounding interlocking swing arm (23) is connected with a return spring (25), the first transmission mechanism (2) further comprises a swing arm limiting structure, and the swing arm limiting structure is used for limiting the swing position of the grounding interlocking swing arm (23) under the action of the return spring (25) to correspond to the locking position of the grounding interlocking stop block (27); the first transmission mechanism (2) further comprises a poking part fixed on a switching-on and switching-off indicating shaft or a switching-on and switching-off operating shaft of the three-position isolating switch operating mechanism (16), the poking part is used for poking the grounding interlocking swing arm (23) to drive the grounding interlocking stop block (27) to rotate to an unlocking position in the grounding action process of the three-position isolating switch operating mechanism (16), and when the three-position isolating switch operating mechanism (16) conducts isolating switching-on and switching-off, the poking part and the grounding interlocking swing arm (23) are separated from each other.
9. The cable chamber door interlocking structure of the upper three-station ring main unit according to claim 8, wherein the toggle part comprises a dial plate (21) fixed on the switching-on/off indication shaft, and a toggle pin (22) for toggling the grounding interlocking swing arm (23) is arranged on an end surface of the dial plate (21).
10. The cable chamber door interlocking structure of the upper three-station ring main unit according to claim 4, wherein the second transmission mechanism (3) comprises a breaker interlocking connecting lever (31), the breaker interlocking connecting lever (31) is in transmission connection with a switching-on/off indicating shaft or a switching-on/off operating shaft of the breaker operating mechanism (17), two ends of the breaker transmission link (32) are respectively hinged to the breaker interlocking connecting lever (31) and the breaker interlocking stopper (35), the breaker interlocking connecting lever (31) is used for driving the breaker interlocking stopper (35) to rotate to an unlocking position through the breaker transmission link (32) in the switching-on action process of the breaker operating mechanism (17), and the breaker interlocking stopper (35) is driven to rotate to the locking position through the breaker transmission link (32) in the switching-off action process of the breaker operating mechanism (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210072578.2A CN114420479B (en) | 2022-01-21 | 2022-01-21 | Cable chamber door interlocking structure of upper three-station ring main unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210072578.2A CN114420479B (en) | 2022-01-21 | 2022-01-21 | Cable chamber door interlocking structure of upper three-station ring main unit |
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| Publication Number | Publication Date |
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| CN114420479A true CN114420479A (en) | 2022-04-29 |
| CN114420479B CN114420479B (en) | 2023-11-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210072578.2A Active CN114420479B (en) | 2022-01-21 | 2022-01-21 | Cable chamber door interlocking structure of upper three-station ring main unit |
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| CN214505299U (en) * | 2021-03-09 | 2021-10-26 | 福建中能电气有限公司 | Door interlock of upper isolation lower circuit breaker ring main unit and ring main unit |
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| CN106169391A (en) * | 2016-08-31 | 2016-11-30 | 中国西电电气股份有限公司 | A kind of chopper and the mechanical interlock mechanism of tri-station isolating switch |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN114420479B (en) | 2023-11-07 |
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