CN210984593U - Switchgear and interlocking device of earthing switch and back door thereof - Google Patents

Switchgear and interlocking device of earthing switch and back door thereof Download PDF

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Publication number
CN210984593U
CN210984593U CN201922015877.9U CN201922015877U CN210984593U CN 210984593 U CN210984593 U CN 210984593U CN 201922015877 U CN201922015877 U CN 201922015877U CN 210984593 U CN210984593 U CN 210984593U
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China
Prior art keywords
shaft
door
support
interlocking
plate
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Active
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CN201922015877.9U
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Chinese (zh)
Inventor
林有哲
袁宏志
余其贵
陈文招
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Xiamen Huadian Switchgear Co Ltd
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Xiamen Huadian Switchgear Co Ltd
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Priority to CN201922015877.9U priority Critical patent/CN210984593U/en
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Abstract

The switch equipment comprises an interlocking device of the grounding switch and the rear door, and the interlocking device of the grounding switch and the rear door comprises a rear support, a front support and an interlocking shaft assembly. The rear support is used for being fixed on a doorframe side plate of the cabinet body and is provided with a through hole. The front support is used for being fixed on a bevel gear of the grounding switch and is provided with a through hole. The interlocking shaft assembly includes an interlocking plate and front and rear shaft bars disposed at front and rear ends of the interlocking plate. The front shaft lever penetrates through a through hole of the front support to be connected with the bevel gear, and the rear shaft lever penetrates through a through hole of the rear support and exceeds the through hole. The central axes of the rear shaft lever and the front shaft lever are positioned on the same straight line, the interlocking plate deviates from the central axes of the rear shaft lever and the front shaft lever, and when the grounding switch is in a switching-off position, the air clear distance between the interlocking plate and the lower branch bus is the largest.

Description

Switchgear and interlocking device of earthing switch and back door thereof
Technical Field
The disclosure relates to the field of power equipment, in particular to switchgear and an interlocking device of a grounding switch and a back door of the switchgear.
Background
High-voltage switchgear is used in electrical systems, such as power grids, for switching off or closing no-load and load currents in high-voltage circuits, or for switching off overload and short-circuit currents when a fault occurs in the electrical system.
High-voltage switch cabinets are a type of high-voltage switchgear. The AMS12kV switchgear is currently based on a relative clear air distance of 100.5mm between the branch bus bar in the T800 cabinet type and the metal shaft of the back door earthing switch interlocking mechanism. However, according to the requirements of relevant standards, for example, eighteen power grid major anti-accident measures (revisions) of the 2018 national grid company Limited, for 12kV switchgear, the air clear distance between the phases and the ground is required to be more than or equal to 125 mm. Traditionally, for satisfying withstand voltage demand, generally set up insulating barrier on the back door metal axle and overcome the not enough of relative ground air clear distance, however, lack effective detection means at present, insulating barrier's insulating properties can not obtain guaranteeing to insulating barrier extremely easily wets and loses insulating nature, and insulating properties also can descend after the cubical switchboard long-term operation, so easily causes the cubical switchboard trouble, influences the electric wire netting safe operation.
Disclosure of Invention
In order to solve the problem that the air clear distance between a metal shaft of an earthing switch interlocking mechanism and a lower branch bus is short in the related art, the disclosure provides a switch device and an interlocking device of an earthing switch and a back door thereof.
The present disclosure provides an interlock of earthing switch and back door, includes:
the rear support is used for being fixed on a door frame side plate of the switch equipment and is provided with a through hole;
the front support is used for being fixed on a bevel gear of the grounding switch and is provided with a through hole;
an interlock shaft assembly comprising:
the interlocking plate is opposite to a lower branch bus of the switch device;
the rear shaft lever is positioned at the rear end of the interlocking plate, and the rear shaft lever penetrates through the through hole of the rear support and exceeds the through hole;
the front shaft lever is positioned at the front end of the interlocking plate, and the front shaft lever penetrates through a through hole of the front support to be connected with the bevel gear;
the central axes of the rear shaft lever and the front shaft lever are positioned on the same straight line, the interlocking plate deviates from the central axes of the rear shaft lever and the front shaft lever, the bevel gear is driven to rotate by the rotation of an operating lever of the grounding switch under the state that a rear door of a cabinet body of the switch device is closed, the interlocking shaft assembly is driven to rotate by the bevel gear, and when the grounding switch is in a brake separating position, the interlocking plate rotates to a position far away from the lower branch bus, so that the air clear distance between the interlocking plate and the lower branch bus is maximum.
The present disclosure further provides a switch device, which includes a cabinet body, a ground switch disposed in the cabinet body, and an interlocking device of the ground switch and a back door, where the ground switch includes an operating rod, a bevel gear connected to the operating rod, a bull gear in transmission connection with the bevel gear, another bevel gear in transmission connection with the bull gear, a main shaft of the ground switch connected to the bull gear, and a moving contact and a static contact of the ground switch, the main shaft of the ground switch is driven by the operating rod to drive the moving contact and the static contact of the ground switch to be closed or disconnected, the another bevel gear is connected to a front shaft lever of the interlocking device to drive the front shaft lever to rotate, and a back door of the cabinet body pushes the back shaft lever to move forward when being closed.
The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:
the interlock device of earthing switch and back door of this disclosure includes back support, preceding support and interlock axle subassembly. The rear support is used for being fixed on a doorframe side plate of the cabinet body and is provided with a through hole. The front support is used for being fixed on a bevel gear of the grounding switch and is provided with a through hole. The interlocking shaft assembly includes an interlocking plate and front and rear shaft bars disposed at front and rear ends of the interlocking plate. The front shaft lever penetrates through a through hole of the front support to be connected with the bevel gear, and the rear shaft lever penetrates through a through hole of the rear support and exceeds the through hole. The central axes of the rear shaft lever and the front shaft lever are positioned on the same straight line, the interlocking plate is connected to the same side surface of the rear shaft lever and the front shaft lever and deviates from the central axes of the rear shaft lever and the front shaft lever, the bevel gear is driven to rotate by the rotation of the operating rod of the grounding switch under the state that the rear door of the cabinet body is closed, the interlocking shaft assembly is driven to rotate by the bevel gear, and when the grounding switch is positioned at the switching-off position, the interlocking plate rotates to a position far away from the lower branch bus, so that the distance between the interlocking plate and the lower branch bus is maximum. The interlocking plate is driven to rotate by the front shaft rod and the rear shaft rod at two ends, the interlocking plate can be arranged in a plate shape, the interlocking plate deviates from the central axes of the front shaft rod and the rear shaft rod and protrudes outwards from the front shaft rod and the rear shaft rod, so that when the interlocking plate rotates to a position far away from the lower branch bus, the air clear distance D1 between the interlocking plate and the lower branch bus is the largest, the distance D1 can reach at least 126.6mm and is larger than 125mm, and the requirements of relevant standards are met, for example, the requirements of eighteen major grid accident prevention measures (revisions) of 2018 national grid Limited are met.
The switchgear of this disclosure can guarantee that the clear distance of air D1 between interlocking board and the lower branch generating line is greater than 125mm through setting up the interlock of above-mentioned earthing switch and back door, satisfies the requirement of relevant standard.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic perspective view of a switchgear of the present disclosure.
Fig. 2 is a schematic structural diagram of an interlocking device of the grounding switch and the rear door arranged in the cabinet body.
Fig. 3 is a perspective view of the interlock device of the earthing switch and the back door.
Fig. 4 is a sectional view of fig. 3.
Fig. 5 is a top view of fig. 2.
Fig. 6 is a partially enlarged view of region a in fig. 1.
Detailed Description
For further explanation of the principles and construction of the present invention, reference will now be made in detail to the preferred embodiments of the present invention, which are illustrated in the accompanying drawings.
As shown in fig. 1 and 2, the present disclosure provides a switchgear 100, and the switchgear 100 may be a cabinet type, and may be applied to a 12KV power grid. The switchgear 100 includes a cabinet 20, and a circuit breaker 40, an earthing switch (not shown), and an interlock 10 of the earthing switch and a rear door, which are provided in the cabinet 20.
The earthing switch comprises an operating rod (not shown), a bevel gear 31 connected with the operating rod, a bull gear 32 in transmission connection with the bevel gear 31, another bevel gear 33 in transmission connection with the bull gear 32, an earthing switch main shaft 34 connected with the bull gear 32 and earthing switch moving and static contacts (not shown). One end of the operating rod extends out of the cabinet body 20 for an operator to operate, and the other end is inserted into the shaft hole 311 of the bevel gear 31. When the operating rod rotates, the bevel gear 31 is driven to rotate, the bevel gear 31 drives the large gear 32 to rotate, and the large gear 32 drives the grounding switch main shaft 34 to rotate, so that the grounding switch main shaft 34 drives the moving contact and the static contact of the grounding switch to be closed or opened under the driving of the operating rod, and the opening and closing of the grounding switch are realized.
The locking device 10 is connected to a further bevel gear 33, and the operating lever, which rotates the bevel gear 33, rotates the locking device 10, so that the locking device 10 establishes a locking between the earthing switch and the back door 21.
Specifically, as shown in fig. 3 and 4, the interlock device 10 includes a rear support 11, a front support 12, and an interlock shaft assembly 13. The rear support 11 is fixed to a doorframe side plate 22 of the cabinet 20, and the front support 12 is fixed to another bevel gear 33 via a connecting plate 122. Both ends of the interlock shaft assembly 13 penetrate through the through holes of the rear mount 11 and the front mount 12, respectively.
As shown in fig. 5, the interlocking shaft assembly 13 includes an interlocking plate 131, a rear shaft 132, and a front shaft 133. The interlocking plate 131 is disposed opposite to the lower branch bus bar 23 in the cabinet body. The rear shaft 132 is located at the rear end of the interlocking plate 131, the rear shaft 132 is inserted into and extends beyond the through hole of the rear support 11, and the extended length can penetrate through the doorframe side plate 22, so that the rear shaft 132 can be pushed forward when the rear door 21 is closed. A front shaft 133 is located at a front end of the interlocking plate 131, and the front shaft 133 is inserted into a through-hole of the front support 12 to be coupled with the bevel gear 33.
The central axes of the rear shaft 132 and the front shaft 133 are aligned, and the interlocking plate 133 is connected to the same side of the rear shaft 132 and the front shaft 131 and is offset from the central axes of the rear shaft 132 and the front shaft 133. When the rear door 21 of the cabinet 20 is closed, the rear door 21 pushes the rear shaft 132 to move forward, the bevel gear 33 is rotated by the rotation of the operating rod of the earthing switch, and the interlocking shaft assembly 13 is rotated by the bevel gear 33, so that when the earthing switch is in the opening position, the interlocking plate 131 rotates to a position away from the lower branch bus 23, and the air clear distance between the interlocking plate 131 and the lower branch bus 23 is maximized.
Since the interlocking plate 131 is rotated by the front shaft 133 and the rear shaft 133 at both ends, the interlocking plate 131 may be configured in a plate shape, and the interlocking plate 131 is offset from the central axes of the front shaft 133 and the rear shaft 132 and is protrudingly disposed on one side of the front shaft 133 and the rear shaft 132, so that when the interlocking plate 131 is rotated to a specific position, as shown in fig. 5, the air clear distance D1 between the interlocking plate 131 and the lower branch bus 23 is the largest, and the air clear distance D1 may be at least 126.6mm and larger than 125mm, so as to satisfy the requirements of the relevant standards, for example, the requirements set forth in eighteen power grid major countermeasures (revisions) of 2018 national power grid limited.
Here, the term "specific position" refers to a position where the interlocking plate 131 is rotated to a first position away from the lower branch bus bar branch 23, as shown in fig. 5, where the interlocking plate 131 is located.
Referring to fig. 3, the main body of the interlocking plate 131 includes a web 1311 and wings 1312 disposed at both sides of the web 1311, and the web 1311 and the wings 1312 form a U-shaped groove plate. Extension arms 1313 are provided at both ends of the body of the interlocking plate 131, and the extension arms 1313 are fixed to the rear shaft 132 or the front shaft 133 by a connector such as a bolt. Each extension limb 1313 includes two limbs disposed on both sides of the front shaft 133 or the rear shaft 132 and symmetrically disposed with respect to the central axis, each of which extends outward from the outer side of the front shaft 133 or the rear shaft 132. The extension wings 1313 are provided such that the U-shaped channel plates protrude from the outer side surfaces of the front shaft 133 and the rear shaft 132.
Referring back to fig. 4, the rear shaft 132 is provided with a rear latch cam 134. The rear locking cam 134 is disposed over the rear shaft 132 and is eccentrically disposed relative to the rear shaft 132. Optionally, the rear latch cam 134 may also be disposed on a rear sleeve 135, the rear sleeve 135 being fitted over the rear shaft 132. The rear latch cam 134 may be integrally formed with the rear sleeve 135. The rear latch cam 134 is located on the front side of the rear holder 11. The rear locking cam 134 is provided with a limit pin 1341, and after the rear door 21 is opened, the limit pin 1341 moves backward and then is matched with the pin shaft hole 11a on the rear support 11 for limiting, so as to block the rotation of the rear shaft lever 132 and prevent the rotation of the interlocking shaft assembly 13 after the rear door 21 is opened. The rear shaft 132 is not rotated to make the bevel gear 33 not rotated, and the bevel gear 33 is engaged with the large gear 32 to make the large gear 32 not rotated, thereby preventing the operation lever of the earthing switch from performing a switching-off operation after the rear door is opened. When the rear door 21 is closed, the rear locking cam 134 moves forward (i.e., moves in the direction of the front support 11), the limit pin 1341 disengages from the pin hole 11a of the rear support 11, the rear shaft 132 releases the limit to rotate, and at this time, the operating lever of the earthing switch is operated to perform a closing operation.
A front locking cam 136 is fixed on the front shaft 133, the front locking cam 136 is eccentrically arranged relative to the front shaft 133, and the front locking cam 136 is provided with a limit pin 1361 for cooperating with the pin shaft hole 121 on the front support 12 to block the front shaft 133 from rotating. Specifically, when the rear door 21 is opened, the entire interlock shaft assembly 13 moves backward, and the limit pin 1361 of the front lock cam 136 on the front shaft 133 is inserted into the pin hole 121 of the front holder 12 to limit the rotation of the front shaft 133, thereby preventing the rotation of the interlock shaft assembly 13 after the rear door 21 is opened. When the rear door 21 is closed, the rear door 21 pushes the rear shaft 132 to move forward, so as to drive the interlocking plate 131 and the front shaft 133 to move forward, the limit pin 1361 of the front locking cam 136 on the front shaft 133 is far away from the pin hole 121 of the front support 12, and the limit on the front shaft is released, so that the interlocking shaft assembly 13 can rotate under the drive of the operating rod.
Alternatively, the front latch cam 136 may be disposed on the outside of a front sleeve 137, and the front sleeve 137 is sleeved on the front shaft 133. The front latch cam 136 may also be integrally formed with the front sleeve 137. The front sleeve 137 is inserted into the through hole of the front support 12, and the front locking cam 136 on the front sleeve 137 is located at the front side of the front support 12.
Alternatively, as shown in fig. 5, one of the extension arms 1313 of the interlocking plate 131 is connected to both sides of the front sleeve 137, and the other extension arm 1313 is connected to both sides of the rear sleeve 135, so that the U-shaped slot plate protrudes from the front shaft 133 and the rear shaft 132.
The rear support 11 comprises a through support 111 and two fixed supports 112, the through support 111 comprises a web 111c and two side wings 111b and 111c, and the web 111c and the two side wings 111b and 111c enclose a U-shaped groove. Both side wings 111b and 111c are provided with through holes, and the rear shaft 132 penetrates through the through holes of both side wings 111b and 111 c. One side of each of the two fixing brackets 112 is connected to the side wing 111b at the rear end, and the other side of the fixing bracket 112 is connected to the doorframe side plate 22.
Referring to fig. 4, the rear axle 132 is provided with an elastic member 14, the elastic member 14 is located in the U-shaped groove of the rear support 11, one end of the elastic member 14 is fixed on the rear axle 132, and the other end is fixed on the rear support 11. When the rear door 21 is closed and the rear axle 132 moves forward, the elastic member 14 compresses the stored energy, and when the rear door is opened, the elastic member 14 releases the energy to restore the original shape, and the rear axle 132 is forced to move backward.
Alternatively, the elastic member 14 may be a compression spring.
Optionally, a bushing 138 is further sleeved on the rear axle 132, and the bushing 138 is inserted into a through hole near the side wing 111b of the rear door 22. One end of the resilient member 14 may be secured to the end of the sleeve 138 that extends into the U-shaped channel. The other end of the sleeve 138 is provided with a rear door locking block 15, and the rear door locking block 15 is located in a space formed by the two fixed supports 112.
As shown in fig. 6, the rear door locking block 15 is sleeved on the rear shaft 132 through a bushing 138 and is eccentrically disposed with respect to the rear shaft 132. The rear door locking block 15 is formed by cutting out a portion of an elliptical plate. The rear door latch block 15 includes a flat portion 151 and a protrusion 152, and the protrusion 152 protrudes from the rear shaft 132 by a length greater than the length of the flat portion 151 protruding from the rear shaft 132. The inner side of the rear door 21 is provided with a cabinet door top block 16, and the cabinet door top block 16 is provided with a groove 161. The rear door locking block 15 cooperates with the cabinet door top block 16 to prevent the rear door 21 from opening when the earthing switch is in the open state. Specifically, when the grounding switch is in the open state, the protruding portion 152 of the rear door locking block 15 rotates to the lower side, the protruding portion 152 is clamped into the groove 161 of the cabinet door top block 16, the rear door 21 is hooked by the rear door locking block 15 and cannot be opened, and therefore, the problem that a maintenance worker opens the door by mistake when the grounding switch is in the open state is avoided. When the grounding switch is in a closed state, the flat portion 151 of the rear door locking block 15 rotates to the lower side, the flat portion 151 cannot be clamped into the groove 161 of the cabinet door top block 16, and the rear door 21 can be opened.
Further, as shown in fig. 3, the front support 12 is shaped like L, the front support 12 includes a vertical plate 12a and a horizontal plate 12b perpendicular to the vertical plate 12a, the top of the vertical plate 12b is opened with the pin hole 121, and the pin hole 121 is used for cooperating with the limit pin 1361 of the front locking cam 136 to limit the rotation of the front axle 133.
The operation of the interlock 10 of the present disclosure is described as follows: when the rear door 21 is closed, the rear door 21 presses the rear shaft lever 132 to move forwards, the rear locking cam 134 is far away from the front support 11, the front locking cam 136 is far away from the rear support 12, the rear shaft lever 132 and the front shaft lever 133 are relieved from limiting, the operating lever can drive the interlocking shaft assembly 13 to rotate, and when the earthing switch main shaft 34 rotates to the opening position, the interlocking plate 131 rotates to a position far away from the lower branch bus, so that the clear air distance between the interlocking plate 131 and the lower branch bus is larger than 125mm, meanwhile, the protrusion 152 of the rear door locking block 15 on the interlocking shaft assembly 13 is clamped into the cabinet door top block 162, the rear door 21 is prevented from being opened, and the mistaken entering of a charged gap is prevented. When the earthing switch main shaft 34 is rotated to the on position, the protrusion 152 of the rear door latch block 15 is disengaged from the cabinet door top block 16, allowing the rear door 21 to be opened. When the rear door 21 is opened, the interlocking shaft assembly 13 moves backward by the elastic member 14, the limit pin 1341 of the rear locking cam 134 is snapped into the pin hole 121 of the rear holder 12, and the limit pin 1361 of the front locking cam 136 is snapped into the pin hole 11a of the front holder 11, so that the interlocking shaft assembly 13 is limited, and the operating lever of the ground switch is further limited to prevent the closing operation of the rear door in an opened state.
References to "front" and "back" in this disclosure are defined as: the rear door is located at the rear, and the direction extending towards the direction of the large gear with the rear door as a reference is the front.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, but rather is intended to cover all equivalent structural changes made by the use of the specification and drawings.

Claims (11)

1. An earthing switch and back door interlock, comprising:
the rear support is used for being fixed on a door frame side plate of the switch equipment and is provided with a through hole;
the front support is used for being fixed on a bevel gear of the grounding switch and is provided with a through hole;
an interlock shaft assembly comprising:
the interlocking plate is opposite to a lower branch bus of the switch device;
the rear shaft lever is positioned at the rear end of the interlocking plate, and the rear shaft lever penetrates through the through hole of the rear support and exceeds the through hole;
the front shaft lever is positioned at the front end of the interlocking plate, and the front shaft lever penetrates through a through hole of the front support to be connected with the bevel gear;
the central axes of the rear shaft lever and the front shaft lever are positioned on the same straight line, the interlocking plate deviates from the central axes of the rear shaft lever and the front shaft lever, the bevel gear is driven to rotate by the rotation of an operating lever of the grounding switch under the state that a rear door of a cabinet body of the switch device is closed, the interlocking shaft assembly is driven to rotate by the bevel gear, and when the grounding switch is in a brake separating position, the interlocking plate rotates to a position far away from the lower branch bus bar, so that the air clear distance between the interlocking plate and the lower branch bus bar is maximum.
2. The ground switch and back door interlock as recited in claim 1,
a rear locking cam is arranged on the rear shaft lever and is positioned on the front side of the rear support, a limiting pin shaft is arranged on the rear locking cam, and the limiting pin shaft is matched with a pin shaft hole in the rear support after the rear door is opened so as to block the rotation of the rear shaft lever;
a front locking cam is fixedly arranged on the front shaft lever, and a limiting pin shaft is arranged on the front locking cam and is used for being matched with a pin shaft hole in the front support seat to block the front shaft lever from rotating;
when the rear door is closed, the rear door pushes the rear shaft lever to move forwards to drive the interlocking plate and the front shaft lever to move forwards, the rear locking cam on the rear shaft lever is separated from the rear support and is released from limiting, the front locking cam on the front shaft lever is separated from the front support and is released from limiting, and the interlocking shaft assembly can be driven by the operating rod of the grounding switch to rotate.
3. The interlock of claim 2, wherein the rear shaft has a rear door locking block for cooperating with a top block of a cabinet door on the rear door to prevent the rear door from opening.
4. The interlock device of claim 3, wherein the top block of the cabinet door has a groove, the rear door locking block is sleeved on the rear shaft rod and is eccentrically arranged with respect to the rear shaft rod, the rear door locking block comprises a flat portion and a protruding portion, the length of the protruding portion protruding out of the rear shaft rod is greater than the length of the flat portion protruding out of the rear shaft rod, and the protruding portion is driven by the rear shaft rod to be clamped into the groove of the top block of the cabinet door when the earthing switch is in the opening position.
5. The interlock of claim 3, wherein said rear shaft has a resilient member disposed therein, said resilient member being positioned within a U-shaped slot in said rear support, one end of said resilient member being secured to said rear shaft and the other end of said resilient member being secured to said rear support, said resilient member being compressed as said rear shaft moves forward.
6. The interlock device of claim 5, wherein the rear support comprises a penetrating support and two fixed supports, the penetrating support comprises a web and two side wings, the web and the two side wings form the U-shaped groove, the two side wings are provided with the penetrating holes, and the rear shaft rod penetrates through the penetrating holes on the two side wings;
one side of each fixed support is connected with the side wing close to the rear door, and the other side of each fixed support is connected with a door frame side plate;
the rear shaft lever is sleeved with a shaft sleeve, the shaft sleeve penetrates through a through hole in a side wing close to the rear door, one end of the elastic piece is fixed to one end, penetrating into the U-shaped groove, of the shaft sleeve, the rear door locking block is arranged at the other end of the shaft sleeve, and the rear door locking block is located in a space formed by the two fixed supports.
7. The earthing switch and rear door interlock as claimed in claim 6, wherein said front latch cam is provided on an outer side of a front sleeve, said front sleeve is sleeved on said front shaft, and one end of said interlock plate is connected to said front sleeve;
the front sleeve penetrates through a through hole of the front support, and the front locking cam is located on the front side of the front support.
8. The earthing switch and back door interlock as recited in claim 7, wherein said rear latch cam is disposed on the outside of a rear sleeve, said rear sleeve is sleeved on said rear shaft, and the other end of said interlock plate is connected to said rear sleeve.
9. The earthing switch and back door interlocking device according to claim 8, wherein the main body of the interlocking plate comprises a web and flanges located on both sides of the web, the web and the flanges form a U-shaped slot plate, and the interlocking plate has extension wings at both ends of the main body, one of the extension wings is connected to both sides of the front sleeve, and the other extension wing is connected to both sides of the back sleeve, so that the U-shaped slot plate protrudes from the front shaft rod, and the air clear distance between the main body of the interlocking plate and the lower branch bus is greater than 125 mm.
10. The interlock device of claim 2, wherein the front support is L-shaped, the front support comprises a vertical plate and a transverse plate perpendicular to the vertical plate, and the top of the vertical plate is provided with the pin shaft hole;
the transverse plate is connected to the bevel gear by a connecting plate.
11. A switchgear, characterized by comprising a cabinet body, a grounding switch arranged in the cabinet body and an interlocking device of the grounding switch and a back door as claimed in any one of claims 1 to 10, wherein the grounding switch comprises an operating rod, a bevel gear connected with the operating rod, a bull gear in transmission connection with the bevel gear, another bevel gear in transmission connection with the bull gear, a grounding switch main shaft and a grounding switch moving and static contact connected with the bull gear, the grounding switch main shaft drives the moving and static contacts of the grounding switch to be closed or disconnected under the driving of the operating rod, the other bevel gear is connected with a front shaft rod of the interlocking device to drive the front shaft rod to rotate, and the back door of the cabinet body pushes the back shaft rod to move forwards when being closed.
CN201922015877.9U 2019-11-20 2019-11-20 Switchgear and interlocking device of earthing switch and back door thereof Active CN210984593U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201922015877.9U CN210984593U (en) 2019-11-20 2019-11-20 Switchgear and interlocking device of earthing switch and back door thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201922015877.9U CN210984593U (en) 2019-11-20 2019-11-20 Switchgear and interlocking device of earthing switch and back door thereof

Publications (1)

Publication Number Publication Date
CN210984593U true CN210984593U (en) 2020-07-10

Family

ID=71438872

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201922015877.9U Active CN210984593U (en) 2019-11-20 2019-11-20 Switchgear and interlocking device of earthing switch and back door thereof

Country Status (1)

Country Link
CN (1) CN210984593U (en)

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