CN111817157B

CN111817157B - Power switch cabinet

Info

Publication number: CN111817157B
Application number: CN202010595462.8A
Authority: CN
Inventors: 吴杰
Original assignee: Yufa Electric Co ltd
Current assignee: Yufa Electric Co.,Ltd.
Priority date: 2020-06-27
Filing date: 2020-06-27
Publication date: 2022-02-22
Anticipated expiration: 2040-06-27
Also published as: CN111817157A

Abstract

The invention relates to the technical field of power switch cabinets and discloses a power switch cabinet. The cabinet comprises a cabinet body, wherein a placing cavity with a forward opening is arranged in the cabinet body, and a partition plate is arranged in the placing cavity; the rear side of the cabinet body and the positions at the upper end and the lower end extend backwards to form mounting parts, and mounting plates are arranged among the mounting parts; the heat-conducting plate placing cavity with an opening facing the mounting plate is arranged in the partition plate, the heat-conducting plate placing cavity is internally provided with a heat dissipation mechanism for dissipating heat of the placing cavity, the heat dissipation mechanism comprises a heat-conducting plate positioned in the heat-conducting plate placing cavity, the heat-conducting plate is connected with a heat dissipation sheet through a heat-conducting pipe, and the heat dissipation sheet is uniformly provided with heat dissipation fans; the mounting plate is provided with an air outlet for the radiating fan to extend out. Through above-mentioned mechanism for need not to set up the thermovent on the power switch cabinet lateral wall, avoided external dust, greasy dirt and harmful gas etc. to get into the internal corrosive action that causes the internal power equipment of cabinet better, also can realize dispelling the heat to the cabinet body simultaneously.

Description

Power switch cabinet

Technical Field

The invention relates to the technical field of power switch cabinets, in particular to a power switch cabinet.

Background

The power switch cabinet is important electric equipment for opening, closing, controlling and protecting in a power system. The switch cabinet mainly comprises measuring equipment, a circuit breaker, a disconnecting switch, a load switch, an operating mechanism and various protection devices, and is widely applied to places such as transformer substations, power plants and the like. The power switch cabinet is used as a combined electrical appliance, the heat generation density of the power switch cabinet is high, and if the heat in the power switch cabinet is too high, the reliability and the service life of the switch cabinet are seriously influenced, so that the heat dissipation of the interior of the power switch cabinet is particularly important.

Generally, a heat dissipation opening is formed in a side wall of a general power switch cabinet, and a heat dissipation fan is installed in the heat dissipation opening. The ventilation of the air in the cabinet body is increased through the work of the cooling fan, so that the heat in the power switch cabinet is taken away. Some power switch cabinets adopt air conditioner external cooling and air conditioner internal cooling modes, namely, the power switch cabinets are placed in an air conditioner room, or small air conditioners are arranged inside the power switch cabinets to realize cooling.

In the above heat dissipation manner, if the heat dissipation opening is formed and the heat dissipation fan is installed, external dust, oil stains, harmful gas and the like can enter the cabinet body along with the heat dissipation opening, and the heat dissipation opening is accumulated day by day and has a certain corrosion effect on electric appliances in the cabinet body. If through the cooling mode outside the air conditioner and inside the air conditioner, the volume ratio of rack air conditioner is great, and the installation is got up complicacy, and the running cost is higher, and rack air conditioner also can produce the comdenstion water when using, discharges very inconveniently, also can bring danger for the internal electronic component of cabinet.

Disclosure of Invention

In response to one or more of the deficiencies in the prior art, the present invention provides a power switch cabinet.

In order to solve the above technical problems, the present invention is solved by the following technical solutions.

The power switch cabinet comprises a cabinet body, wherein a placing cavity with a forward opening is arranged in the cabinet body, and a partition plate is arranged in the placing cavity; the rear side of the cabinet body and the positions at the upper end and the lower end extend backwards to form mounting parts, and mounting plates are arranged among the mounting parts; the heat-conducting plate placing cavity with an opening facing the mounting plate is arranged in the partition plate, the heat-conducting plate placing cavity is internally provided with a heat dissipation mechanism for dissipating heat of the placing cavity, the heat dissipation mechanism comprises a heat-conducting plate positioned in the heat-conducting plate placing cavity, the heat-conducting plate is connected with a heat dissipation sheet through a heat-conducting pipe, and the heat dissipation sheet is uniformly provided with heat dissipation fans; the mounting plate is provided with an air outlet for the radiating fan to extend out.

Through the structure of the invention, the heat-conducting plate is arranged in the heat-conducting plate placing cavity, so that heat generated by the power equipment in the placing cavity can be transferred to the heat-conducting plate through the partition plate and transferred to the radiating fin through the heat-conducting plate, and then the fan on the radiating fin rotates to blow the heat to discharge the radiating fin, thereby realizing the heat dissipation in the cabinet body; through the structure, the side wall of the cabinet body is not required to be provided with a heat radiating port, so that the corrosion effect of external dust, oil stain, harmful gas and the like entering the cabinet body to the electric equipment in the cabinet body is better avoided, and the heat radiation of the cabinet body can be realized.

Preferably, wire outlet holes positioned at the upper side of the corresponding partition plate are uniformly distributed on the rear side surface of the cabinet body, movable sealing plates matched with the side walls of the mounting plates are arranged between the mounting parts and positioned at the left side and the right side, and air holes are uniformly distributed on the sealing plates; a sliding cavity for the corresponding sealing plate to move in is arranged on the rear side wall of the cabinet body, the sealing plate is in sealed fit with the side wall of the sliding cavity, and a first sliding groove communicated with the outer side of the cabinet body is arranged on the side wall of the sliding cavity along the front-back direction; the sliding cavity is internally provided with a baffle which can slide and is used for plugging the air holes, the baffle is in sliding and sealing fit with the side wall of the sealing plate, the sealing plate is provided with a first shifting block which extends out of the first sliding groove, and the baffle is provided with a second shifting block which extends out of the first sliding groove and is positioned on the front side of the first shifting block.

Through the structure of the invention, air outside the cabinet body can enter the wiring cavity through the air holes, and then forms a circulation with airflow blown out of the wiring cavity by the heat dissipation fan, so that heat in the wiring cavity is better discharged, and the heat dissipation effect is better; simultaneously, the closing plate can be retracted the slip intracavity and be convenient for the user to observe the space between the mounting panel and the cabinet body, and the baffle stretches out the slip chamber and can carry out the shutoff to the bleeder vent to can avoid in the dust gets into the space between the mounting panel and the cabinet body under the great environment of dust better, make it have dirt-proof effect.

Preferably, the two sides of the mounting plate are provided with mounting seats corresponding to the first sliding grooves, the mounting seats are provided with rotatable rotating shafts, the rotating shafts are provided with first threads, the first shifting block and the second shifting block are respectively provided with a first threaded hole for the rotating shafts to pass through, and the first threads are in threaded fit with the first threaded holes; a cavity is arranged in the rotating shaft, first limiting grooves which correspond to each other are arranged on the side wall of the cavity along the extending direction of the rotating shaft, the length of each first limiting groove is greater than that of each first thread, two ends of each first limiting groove are respectively located at two ends of each first thread, two slidable spring mounting blocks are arranged in the cavity, first limiting blocks which extend out of the corresponding first limiting grooves are arranged on the spring mounting blocks, and first limiting springs are connected among the spring mounting blocks; the first shifting block and the second shifting block are positioned between the first limiting blocks.

Through the structure, the arrangement of the first limiting spring and the first limiting block enables the rotating shaft to control the first shifting block and the second shifting block to move on the rotating shaft, so that the sealing plate and the baffle plate are controlled to move in a matched mode, and the sealing plate adjusting device has the effects that when the adjusting baffle plate seals the air holes in the sealing plate, the sealing plate cannot move to enable the sealing plate to be adjusted more conveniently, and when the adjusting baffle plate retracts into the sliding cavity, the baffle plate cannot move to enable the sealing plate to be adjusted more conveniently.

Preferably, the front end of the rotating shaft is provided with a fixing mechanism used for fixing the mounting plate between the mounting portions, the fixing mechanism comprises a fixing block, the front end of the rotating shaft penetrates through the corresponding fixing block, one end of the fixing block penetrates through the first sliding groove and extends into the sliding cavity, a first mounting cavity is arranged at the position of the fixing block extending into the sliding cavity, an outlet is arranged above the first mounting cavity, a hinge rod is hinged in the first mounting cavity, and the upper end of the hinge rod can extend out of the outlet; a clamping groove for clamping one end of the hinged rod extending out of the outlet is formed in the side wall of the sliding cavity and above the first sliding groove.

Through the structure in the invention, one end of the hinge rod in the first mounting cavity, which extends out of the opening, is extended out of the outlet and is clamped into the clamping groove in a vertical state, so that the fixed block is positioned and fixed in the first sliding groove, the whole heat dissipation mechanism can be fixed on the cabinet body, and meanwhile, the heat dissipation mechanism is more convenient to assemble and disassemble on the cabinet body, so that the whole heat dissipation mechanism is convenient to disassemble, and the power transmission line and the like in the wiring cavity are convenient to overhaul.

Preferably, the front side wall, the rear side wall and the upper part of the first mounting cavity are provided with first hinge holes relatively, and the side wall of the hinge rod is provided with a first hinge column extending into the corresponding first hinge hole; a driving mechanism for driving the hinge rod to rotate is arranged in the first mounting cavity, the driving mechanism comprises a push block, a sliding groove for the lower end of the hinge rod to extend into is formed in the push block along the up-down direction, a limiting sliding groove is formed in the side wall, opposite to the sliding groove, of the sliding groove along the up-down direction, a sliding column extending into the corresponding limiting sliding groove to slide is arranged at the end part of the hinge rod extending into the sliding groove, and a groove for the first hinge column to be clamped into is formed in the upper end part of the push block; the front side wall of the push block is connected with a first threaded rod, and the first threaded rod extends into a rotatable rotating column; still be equipped with the second installation cavity that supplies the axis of rotation to run through in the fixed block, be equipped with the rotation hole that supplies the rotation post to pass between first installation cavity and second installation cavity, the one end of rotating the post is connected with the first bevel gear that is located the second installation cavity, first bevel gear meshes with one set of second bevel gear in the axis of rotation mutually.

According to the invention, through the arrangement of the driving mechanism, the second bevel gear rotates to drive the first bevel gear to rotate to drive the rotating column to rotate so as to drive the pushing block to move left and right in the first mounting cavity, and further drive the upper end of the hinged rod to extend out of or retract into the first mounting cavity from the opening, when the hinged rod extends out of the opening and is clamped into the groove in a vertical state, the fixed block is fixedly mounted on the first chute, and thus the heat dissipation mechanism is integrally mounted and dismounted on the cabinet body.

Preferably, a rotating chute with an annular cross section is arranged on the side surface of the rotating shaft in the second mounting cavity, and a rotating block matched with the rotating chute is arranged on the second bevel gear; be located and be equipped with relative second spacing groove along the extending direction of axis of rotation on the lateral wall of the cavity of second installation intracavity, be equipped with in the axis of rotation and be used for driving second bevel gear pivoted clutching mechanism, clutching mechanism is including being located the movable block that removes in the cavity, be equipped with the second stopper that stretches out corresponding second spacing groove on the movable block, be connected with the push rod that stretches out the cavity on the movable block, the opening part of cavity is equipped with end cap and push rod and passes the end cap setting, the cover is equipped with the reset spring who is used for driving the movable block antedisplacement on being located the cavity on the push rod.

According to the invention, through the arrangement of the clutch mechanism, the pressing push rod drives the second limiting block to be attached to the second bevel gear, the rotating shaft is rotated to drive the second bevel gear to rotate, the hinge rod is further driven to rotate to extend out of or retract into the first mounting cavity and to be matched with the clamping groove, so that the whole heat dissipation mechanism is assembled and disassembled on the cabinet body, and the operation is simple and convenient.

Preferably, one end of the second limiting block extending out of the second limiting groove is connected with a friction ring sleeved outside the rotating shaft, and the contact area between the second limiting block and the second bevel gear is preferably increased, so that the friction force between the second limiting block and the second bevel gear is increased, and the second bevel gear is driven to rotate conveniently.

Preferably, the side wall opposite to the mounting part and positioned at the rear end is provided with a step groove for clamping the mounting plate, and the mounting plate is preferably clamped and fixed in the step groove to ensure that the fixing effect of the mounting plate is better.

Drawings

Fig. 1 is a schematic view of a switchgear having a heat dissipation mechanism in embodiment 1;

fig. 2 is a schematic sectional view of the switchgear in embodiment 1;

fig. 3 is a schematic view of the cabinet in embodiment 1;

FIG. 4 is a schematic structural view of a sealing plate and a baffle plate in example 1;

FIG. 5 is a schematic structural view of a rotary shaft in embodiment 1;

FIG. 6 is a schematic sectional view of a fixed block and a rotating shaft in embodiment 1;

fig. 7 is a half-sectional view of a fixing block in embodiment 1;

fig. 8 is a schematic cross-sectional view of the fixing block in embodiment 1 at the first chute;

FIG. 9 is a schematic configuration diagram of a drive mechanism in embodiment 1;

fig. 10 is a schematic view of a switchgear in embodiment 2;

fig. 11 is a schematic view of a sealing mechanism in embodiment 2;

FIG. 12 is a schematic view of the casing in embodiment 2;

FIG. 13 is a schematic view showing the connection between the moving plate and the cover plate in embodiment 2;

fig. 14 is a schematic sectional view of a guide rod, a rotating rod, and a second threaded rod in embodiment 2;

FIG. 15 is a schematic view showing the connection of a guide lever, a rotation lever and a second screw lever in embodiment 2

Fig. 16 is a schematic view of a rotating lever in embodiment 2;

FIG. 17 is a schematic structural view of a shift ring in embodiment 2;

FIG. 18 is a schematic view of a stopper push ring according to embodiment 2;

fig. 19 is a cross-sectional schematic view of a second threaded rod in embodiment 2;

Detailed Description

For a further understanding of the invention, reference should be made to the following detailed description taken in conjunction with the accompanying drawings and examples. It is to be understood that the examples are illustrative of the invention and not limiting.

Example 1

As shown in fig. 1 to 9, the present embodiment provides an electric power switch cabinet, which includes a cabinet body 310, a placing cavity 320 with a forward opening is disposed in the cabinet body 310, and a partition 321 is disposed in the placing cavity 320; the rear side of the cabinet body 310 and the upper and lower ends extend backwards to form mounting parts 310a, and mounting plates 311 are arranged between the mounting parts 310 a; a heat conducting plate placing cavity 322 with an opening facing the mounting plate 311 is arranged in the partition plate 321, a heat conducting plate 323 is arranged in the heat conducting plate placing cavity 322, the heat conducting plate 323 is connected with a radiating fin 325 through a heat conducting pipe 324, and radiating fans 326 are uniformly distributed on the radiating fin 325; the mounting plate 311 is provided with an air outlet 312 through which the heat dissipation fan 326 extends.

Through the arrangement of the partition 321, the mounting plate 311, the heat-conducting plate placing cavity 322, the heat-conducting plate 323, the heat pipe 324, the heat sink 325 and the heat sink fan 326 in the present embodiment, the heat-conducting plate 323 is installed in the heat-conducting plate placing cavity 322, so that the heat generated by the electric power equipment in the placing cavity 320 can be transferred to the heat-conducting plate 323 through the partition 321 and transferred to the heat sink 325 through the heat pipe 324 by the heat-conducting plate 323, and further the heat sink fan 326 on the heat sink 325 rotates to blow the heat to discharge out of the heat sink 325, thereby realizing heat dissipation in the switch cabinet, wherein the partition 321, the heat-conducting plate 323, the heat pipe 324 and the heat sink 325 are all made of metal with high thermal conductivity, such as copper; through the arrangement of the air outlet 312, the air outlet 312 is clamped on the housing of the heat dissipation fan 326, so that the heat conduction plate 323, the heat conduction pipe 324 and the heat dissipation fin 325 can be integrally fixed, and the mounting plate 311 is prevented from blocking the wind direction of the heat dissipation fan 326, so that the heat dissipation effect is reduced; through foretell structure, need not to set up the thermovent on the cubical switchboard lateral wall in this embodiment, avoided external dust, greasy dirt and harmful gas etc. to get into the internal corrosive action that causes the internal electrical equipment of cabinet better, also can realize dispelling the heat to the power switch cabinet simultaneously.

In this embodiment, wire outlet holes 330 are uniformly distributed on the rear side surface of the cabinet body 310 and located on the upper side of the corresponding partition 321, sealing plates 340 which are movable and matched with the side walls of the mounting plate 311 are arranged between the mounting portions 310a and located on the left and right sides, and air holes 341 are uniformly distributed on the sealing plates 340; a sliding cavity 331 for the corresponding sealing plate 340 to move in is arranged on the rear side wall of the cabinet body 310, the sealing plate 340 is in close fit with the side wall of the sliding cavity 331, and a first sliding groove 332 communicated with the outer side of the cabinet body 310 is arranged on the side wall of the sliding cavity 331 along the front-back direction; a baffle 343 which can slide and is used for blocking the air holes 341 is arranged in the sliding cavity 331, the baffle 343 is in sliding and sealing fit with the side wall of the sealing plate 340, a first shifting block 342 which extends out of the first sliding groove 332 is arranged on the sealing plate 340, and a second shifting block 344 which extends out of the first sliding groove 332 and is positioned on the front side of the first shifting block 342 is arranged on the baffle 343.

Through the arrangement of the mounting portion 310a, the mounting plate 311 and the sealing plate 340 in the present embodiment, a wiring cavity is formed, wherein the wire outlet hole 330 is arranged, so that the power line of the electrical equipment mounted on the partition 321 can extend out of the placing cavity 320 through the wire outlet hole 330 and be located in the wiring cavity for wiring, in the prior art, in order to maintain the air tightness in the placing cavity 320, when the power line passes through the wire outlet hole 330, the wire outlet hole 330 is sealed and sealed; through the arrangement of the air holes 341, air outside the cabinet body can enter the wiring cavity through the air holes 341, so that a circulation flow is formed between the air holes and the air flow blown out of the wiring cavity by the heat dissipation fan 326, and therefore heat in the wiring cavity is better discharged, and the effect of the heat dissipation mechanism is better; the sliding cavity 331, the first sliding groove 332 and the first shifting block 342 are arranged, so that the sealing plate 340 can slide into the sliding cavity 331 by shifting the first shifting block 342 along the first sliding groove 332, and openings are formed at two sides of the routing cavity, so that a user can conveniently observe wiring in the routing cavity and the heat conducting pipe 324 and the heat radiating fin 325; wherein, the baffle 343 and the second shifting block 344 are arranged to make the baffle 343 and the side wall of the sealing plate 340 slidably and hermetically fit, when the baffle 343 and the sealing plate 340 are both located in the sliding chamber 331, they are in a state that facilitates the user's observation of the wiring in the wiring chamber and the heat conductive pipes 324 and the heat sink 325, when the second shifting block 344 is shifted to move along the first sliding slot 332 to drive the baffle 343 to be located in the sliding cavity 331 and the sealing plate 340 slides out of the sliding cavity 331 to seal the openings formed on the two sides of the routing cavity, the air holes 341 can allow air to enter the routing cavity to achieve better heat dissipation effect, at this time, the second shifting block 344 is shifted to slide the baffle 343 out of the sliding cavity 331, further, the vent holes 341 are blocked by the baffle 343, so that the wiring cavity can be prevented from being corroded and damaged by rainwater entering the wiring cavity in a rainfall environment, wherein, the sealing plate 340 and the baffle 343 are hermetically matched with the side wall of the sliding cavity 331.

In this embodiment, the mounting seat 313 is disposed on two sides of the mounting plate 311 corresponding to the first sliding chute 332, the rotatable rotating shaft 314 is disposed on the mounting seat 313, the first screw 351 is disposed on the rotating shaft 314, the first shifting block 342 and the second shifting block 344 are both provided with a first threaded hole 345 for the rotating shaft 314 to pass through, and the first screw 351 is in threaded fit with the first threaded hole 345; a cavity 350 is arranged in the rotating shaft 314, first limiting grooves 352 which correspond to each other are arranged on the side wall of the cavity 350 along the extending direction of the rotating shaft 314, the length of each first limiting groove 352 is larger than that of each first thread 351, two ends of each first limiting groove 352 are respectively located at two ends of each first thread 351, two slidable spring mounting blocks 353 are arranged in the cavity 350, first limiting blocks which extend out of the corresponding first limiting grooves 352 are arranged on the spring mounting blocks 353, and first limiting springs 354 are connected between the spring mounting blocks 353; the first shifting block 342 and the second shifting block 344 are located between the first limit blocks.

Through the arrangement of the mounting seat 313 and the rotating shaft 314 in the embodiment, the rotating shaft 314 is rotatably connected to the mounting seat 313; through the arrangement of the first screw 351 and the first screw hole 345, the rotating shaft 314 passes through the first screw hole 345, so that the first shifting block 342 and the second shifting block 344 are sleeved on the rotating shaft 314, and the rotating shaft 314 rotates to drive the first shifting block 342 and the second shifting block 344 to move; through the arrangement of the cavity 350, the first limiting groove 352, the spring mounting block 353, the first limiting block and the first limiting spring 354, the first limiting block on the spring mounting block 353 extends out of the first limiting groove 352 and is respectively positioned at two ends of the first thread 351 through the first limiting spring 354, because the first shifting block 342 and the second shifting block 344 are positioned between the first limiting blocks, the rotating shaft 314 rotates to drive the first shifting block 342 to move along the first thread 351 to drive the sealing plate 340 to move out of the sliding cavity 331, when the first shifting block 342 is separated from the first thread 351, the sealing plate 340 is just sealed, at this time, the first shifting block 342 pushes the first limiting block attached to the first shifting block 342 to move backwards, drives the first limiting spring 354 to pull the other spring mounting block 353 to move backwards, so that the first limiting block attached to the second shifting block 344 has an acting force for pushing the second shifting block 344 to move backwards, then, the rotating shaft 314 is rotated, the sealing plate 340 cannot move to be in a sealing state, the second shifting block 344 moves along the first thread 351 to drive the baffle 343 to slide out of the sliding groove 331 to block the air holes 341, and the sealing plate 340 cannot move to be more convenient to adjust when the air holes 341 on the sealing plate 340 are blocked by the adjusting baffle 343; at this time, the reverse rotation rotating shaft 314 drives the second shifting block 344 to move along the first thread 351 to drive the baffle 343 to retract into the sliding cavity 331, when the second shifting block 344 is separated from the first thread 351, the baffle 343 is completely located in the sliding cavity 331, at this time, the second shifting block 344 pushes the first limiting block attached to the second shifting block 344 to move backward, the first limiting spring 354 is driven to pull the other spring mounting block 353 to move backward so that the first limiting block attached to the first shifting block 342 has an acting force for pushing the first shifting block 342 to move forward, at this time, the reverse rotation rotating shaft 314 is rotated next, the baffle 343 cannot move to be in a limiting state, the first shifting block 342 drives the sealing plate 340 to retract into the sliding cavity 331 along the first thread 351, so that observation in the routing cavity is facilitated, and the baffle 343 cannot move when the sealing plate 340 is adjusted to retract into the sliding cavity 331, so that adjustment of the sealing plate 340 is more convenient.

In this embodiment, a fixing mechanism 315 for fixing the mounting plate 311 between the mounting portions 310a is disposed at the front end of the rotating shaft 314, the fixing mechanism 315 includes a fixing block 360, the front end of the rotating shaft 314 is disposed to penetrate through the corresponding fixing block 360, one end of the fixing block 360 passes through the first sliding groove 332 and extends into the sliding cavity 331, a first mounting cavity 361 is disposed at the fixing block 360 extending into the sliding cavity 331, an outlet 371 is disposed above the first mounting cavity 361, a hinge rod 380 is hinged in the first mounting cavity 361, and the upper end of the hinge rod 380 can extend from the outlet 371; a clamping groove 381, into which one end of the hinge rod 380 extending out of the outlet 371 is clamped, is formed on the side wall of the sliding chamber 331 and above the first sliding groove 332.

Through the arrangement of the fixing block 360, the first mounting cavity 361, the outlet 371, the hinge rod 380 and the clamping groove 381 in the embodiment, the rotating shaft 314 penetrates through the fixing block 360, so that the mounting plate 311, the rotating shaft 314, the sealing plate 340 and the baffle 343 are connected into a whole; wherein, because 360 one ends of fixed block pass first spout 332 and stretch into in the slip chamber 331, make the one end that is located the articulated mast 380 of first installation cavity 361 stretch out and be vertical state card income draw-in groove 381 by export 371 and make 360 fixed in first spout 332 of fixed block to make heat dissipation mechanism wholly can fix on cabinet body 310, make its dismouting on cabinet body 310 convenience more simultaneously, thereby be convenient for wholly demolish, be convenient for overhaul the power transmission line etc. of walking the intracavity.

In this embodiment, the front and rear side walls of the first mounting cavity 361 and the upper portion thereof are provided with first hinge holes 372, and the side wall of the hinge rod 380 is provided with a first hinge column 391 extending into the corresponding first hinge hole 372; a driving mechanism 362 for driving the hinge rod 380 to rotate is arranged in the first mounting cavity 361, the driving mechanism 362 comprises a push block 390, a sliding groove 392 into which the lower end of the hinge rod 380 extends is arranged on the push block 390 along the up-down direction, a limiting sliding groove 393 is arranged on the side wall opposite to the sliding groove 392 along the up-down direction, a sliding column extending into the corresponding limiting sliding groove 393 to slide is arranged at the end part of the hinge rod 380 extending into the sliding groove 392, and a groove 394 into which the first hinge column 391 is clamped is arranged at the upper end part of the push block 390; the front side wall of the push block 390 is connected with a first threaded rod 395, and the first threaded rod 395 extends into a rotatable rotary column 363 in a threaded manner; a second mounting cavity 364 for the rotating shaft 314 to pass through is further arranged in the fixed block 360, a rotating hole 365 for the rotating column 363 to pass through is arranged between the first mounting cavity 361 and the second mounting cavity 364, one end of the rotating column 363 is connected with a first bevel gear 366 located in the second mounting cavity 364, and the first bevel gear 366 is meshed with a second bevel gear 367 sleeved on the rotating shaft 314.

Through the arrangement of the first hinge hole 372 and the first hinge column 391 in the embodiment, the hinge rod 380 is hinged in the first installation cavity 361; through the arrangement of the push block 390, the sliding groove 392, the limiting sliding groove 393 and the sliding columns, the lower end of the hinge rod 380 extends into the sliding groove 392 and the sliding columns are slidably arranged in the limiting sliding groove 393, so that the push block 390 moves left and right in the first mounting cavity 361 to drive the sliding columns to move up and down in the limiting sliding groove 393, and the hinge rod 380 rotates to enable the upper end of the hinge rod 380 to have an opening to extend out of or retract into the first mounting cavity 361; due to the arrangement of the groove 394, when the push block 390 drives the upper end of the hinge rod 380 to extend out of the opening, the hinge rod 380 can be in a vertical state when the hinge column is located in the groove 394, so that the fixed block is fixed by clamping and matching with the clamping groove 381; through the matching of the rotating column 363 and the threaded rod 395, the rotating column 363 rotates to drive the threaded rod 395 to extend in the rotating column 363 to drive the push block 390 to move left and right in the first installation cavity 361; through the arrangement of the second mounting cavity 364 and the through hole 365, the rotating column 363 is rotatably connected in the through hole 365; through the matching arrangement of the first bevel gear 366 and the second bevel gear 367, the second bevel gear 367 can drive the first bevel gear 366 to rotate so as to drive the rotating column 363 to rotate, so that the matching of the hinge rod 380 and the clamping groove 381 is realized.

In this embodiment, a rotating chute 355 with a ring-shaped cross section is disposed on a side surface of the rotating shaft 314 located in the second mounting cavity 364, and a rotating block matched with the rotating chute 355 is disposed on the second bevel gear 367; be located and be equipped with relative second spacing groove 356 along the extending direction of axis of rotation 314 on the lateral wall of cavity 350 in second installation cavity 364, be equipped with the clutching mechanism who is used for driving second bevel gear 367 pivoted on the axis of rotation 314, clutching mechanism is including being located the movable block 357 that removes in cavity 350, be equipped with the second stopper that stretches out corresponding second spacing groove 356 on the movable block 357, be connected with the push rod 358 that stretches out cavity 350 on the movable block 357, the opening part of cavity 350 is equipped with end cap 359 and push rod 358 passes end cap 359 and sets up, the cover is equipped with on push rod 358 and is used for driving the reset spring 368 that the movable block 357 moved forward in the cavity 350.

In this embodiment, the second bevel gear 367 is rotatably connected to the rotating shaft 314 by the matching arrangement of the rotating chute 355 and the rotating block; through the structure, the push rod 358 is pressed to drive the moving block 357 to move so as to drive the second limiting block to be attached to the second bevel gear 367, and due to the friction force between the second limiting block and the second bevel gear 367, at the moment, the rotation shaft 314 rotates to drive the second bevel gear 367 to rotate to drive the first bevel gear 366 to rotate, so that the hinge rod 380 is driven to rotate to extend out of or retract into the first installation cavity 361, and the fixed block 360 is assembled and disassembled on the cabinet body 310; through the arrangement of the return spring 368, the return spring 368 can drive the moving block 357 to return, and the second limiting block is disengaged from the second bevel gear 367; through the structure in this embodiment, the disassembly and assembly of the fixing block 360 on the cabinet body 310 can be realized by pressing the push rod 358 and rotating the rotating shaft 314, and the operation is simple and convenient.

In this embodiment, one end of the second limiting block extending out of the second limiting groove 356 is connected to a friction ring sleeved outside the rotating shaft 314, and preferably, the contact area between the second limiting block and the second bevel gear 367 is increased to increase the friction force therebetween, so as to facilitate driving the second bevel gear 367 to rotate.

In this embodiment, the side wall opposite to the mounting portion 310a and located at the rear end is provided with a stepped groove 333 for clamping the mounting plate 311, and preferably, the mounting plate 311 is clamped and fixed in the stepped groove 333, so that the fixing effect of the mounting plate 311 is better.

As shown in fig. 10 to 19, the present embodiment provides an electric power switch cabinet, further including a cabinet body 310, a cabinet door 4101 is disposed on the cabinet body 310, ventilation holes 4102 are uniformly distributed on the cabinet door 4101, a sealing mechanism is disposed on the cabinet door 4101 and at the ventilation holes 4102, the sealing mechanism includes a housing 410, a moving chamber 420 with a backward opening is disposed in the housing 410, moving grooves 421 are disposed on left and right side walls of the moving chamber 420 along a front-back direction, and first ventilation grooves 411 are disposed on front side walls of the moving chamber 420 at intervals along the left-right direction; a slidable moving plate 430 is arranged in the moving cavity 420, a slider 431 extending into the corresponding moving groove 421 is arranged on the moving plate 430, and second ventilation grooves 432 which are arranged along the left-right direction and staggered with the first ventilation grooves 411 are arranged on the moving plate 430 at intervals.

Through the arrangement of the housing 410 and the moving chamber 420 in the present embodiment, the opening of the moving chamber 420 is covered and installed on the ventilation hole 4102 so as to be blocked; the movable plate 430 is moved in the movable cavity 420 to be attached to the front side wall of the movable cavity 420 through the arrangement of the movable plate 430, the first ventilation groove 411 and the second ventilation groove 432 are staggered, and meanwhile, the movable plate 430 is in close fit with the front side wall of the movable cavity 420, so that the movable plate 430 can block the first ventilation groove 411, the movable cavity 420 is in a sealed environment, when the movable plate 430 moves in the movable cavity 420 and leaves the front side wall of the movable cavity 420, the gas in the movable cavity 420 can flow out of the shell 410 through the fit of the first ventilation groove 411 and the second ventilation groove 432, and the movable cavity 420 has a ventilation function; in this case, the moving groove 421 and the slider 431 are cooperatively disposed, so that the moving groove 421 can limit the slider 431, and thus the moving plate 430 is limited in movement.

In this embodiment, a guide rod 422 is disposed in the moving slot 421 along the front-rear direction, a threaded cavity 440 with an opening facing the front side of the housing 410 is disposed in the guide rod 422, and a first limiting sliding slot 451 disposed along the front-rear direction is disposed on the sidewall of the threaded cavity 440 located at the front side of the moving slot 421; the slider 431 is provided with a through hole 433 for the guide rod 422 to pass through, the side wall of the through hole 433 is provided with a first limiting block which passes through the first limiting sliding groove 451 and extends into the threaded cavity 440, the guide rod 422 is sleeved with a first spring 434 for pushing the slider 431 to move forwards, and the opening of the threaded cavity 440 is provided with a second threaded rod 435 which extends into the threaded cavity 440 and pushes the slider 431 to move backwards.

Through the structure in the embodiment, the guide rod 422 penetrates through the sliding block 431, so that the sliding block 431 can move along the guide rod 422, wherein due to the arrangement of the threaded cavity 440, the first limit sliding groove 451, the first limit block and the second threaded rod 435, the first limit block penetrates through the first limit sliding groove 451 and extends into the threaded cavity 440, and further, in the process that the second threaded rod 435 is screwed into the threaded cavity 440 through the opening of the threaded cavity 440, the second threaded rod 435 and the first limit block extending into the threaded cavity 440 are squeezed to drive the first limit block to move backwards, so that the moving plate 430 moves backwards along the guide rod 422 and is separated from the front side wall of the moving cavity 420, and therefore, the gas in the moving cavity 420 can circulate and has a ventilating effect; because the first spring 434 always pushes the slider 431 to drive the moving plate 430 to move forward, and further in the process of screwing the second threaded rod 435 out of the threaded cavity 440, the first spring 434 can finally push the moving plate 430 to be attached to the front side wall of the hollow part 420 so that the moving cavity 420 is sealed; in the embodiment, the movement of the moving plate 430 in the moving chamber 420 can be adjusted by screwing the second threaded rod 435 to control the moving chamber 420 to be sealed and ventilated, and the operation is simple.

In this embodiment, a filter screen is disposed in the second ventilation groove 432; a rotating rod 436 which can rotate and one end of which extends out of the shell 410 from the opening of the threaded cavity 440 is arranged in the threaded cavity 440, and the rotating rod 436 penetrates through the second threaded rod 435; a rotating groove 461 with an annular cross section is arranged on the rotating rod 436 along the axial direction of the rotating rod 436, a first threaded passage 462 is arranged on the rear side wall of the rotating groove 461 along the axial direction of the rotating rod 436, and a second threaded passage 463 communicated with the rotating groove 461 is arranged between the two ends of the first threaded passage 462 along the axial direction of the rotating rod 436; be equipped with on the dwang 436 and be used for driving the actuating mechanism of movable plate 430 along guide bar 422 reciprocating motion, actuating mechanism is including the shift ring 441 that overlaps on the dwang 436 and be located rotation groove 461 department, shift ring 441 is equipped with the spacing post 471 that stretches into in corresponding first spacing spout 451 outward, be equipped with in the shift ring 441 and be located rotation groove 461 and can be along the gliding sliding post 472 of first lane 462 and second lane 463, shift ring 441 links to each other with slider 431 through connecting rope 442, the cover is equipped with the spacing push ring 443 that is located screw cavity 440 on the dwang 436, be connected with second spacing spring 444 between spacing push ring 443 and shift ring 441.

Through the arrangement of the filter screen in the embodiment, the filter screen can filter the air entering the moving cavity 420 when the air circulates; through the arrangement of the driving mechanism, the driving mechanism can control the moving plate 430 to vibrate back and forth along the guide rod 422, so that dust on the filter screen can fall off, and the filtering effect is better; wherein, through the arrangement of the rotating rod 436, the moving ring 441, the pulling rope 442, the limit push ring 443 and the second limit spring 444, the limit post 471 is located in the first limit sliding slot 451 to limit the moving ring 441 to move only along the rotating rod 436, wherein, the arrangement of the rotating slot 461, the first sliding way 462, the second sliding way 463 and the sliding post 472, because the second limit spring 444 provides a force for pulling the moving ring 441 to move the sliding post 472 backward, at this time, slowly rotating the rotating rod 436 can drive the sliding post 472 to slide into the first sliding way 462 from the rotating slot 461 and move along the first sliding way 462, because the first sliding way 462 is in a thread shape, the moving ring 441 moves backward along the rotating rod 436, because the sliding block 431 is connected with the moving ring 441 through the pulling rope 442, at this time, the pulling rope 442 is gradually straightened from the original loose state and continues to drive the sliding block 431 to move backward along the guide rod 422, when the sliding column 472 moves into the second sliding channel 463, the first spring 434 rapidly pushes the slider 431 to move forward, so that the slider 431 collides with the end of the second threaded rod 435 to vibrate the moving plate 430, thereby facilitating the falling of dust on the filter screen, at this time, the second limiting spring 444 pushes the moving ring 441 to move along the rotating rod 436 to return to the rotating groove 461, and at this time, the rotating rod 436 is slowly rotated to pull the moving plate 430 to move backward along the guide rod 422, thereby realizing the reciprocating vibration dust shaking of the moving plate 430.

In this embodiment, a second limiting sliding groove 452 is relatively disposed on the sidewall of the threaded cavity 440 at the rear side of the moving groove 421, a second limiting block 482 extending out of the second limiting sliding groove 452 is disposed outside the limiting push ring 443, a second threaded hole 481 for the rotating rod 436 to pass through is disposed on the limiting push ring 443, a second thread 464 in threaded fit with the second threaded hole 481 is disposed on the rotating rod 436, and the first spring 434 is disposed between the sliding block 431 and the second limiting block 482; move on the left and right sides lateral wall of chamber 420 and be located the opening part and be equipped with the apron relatively and accomodate groove 423, be equipped with the second hinge hole 424 that is located the opening part on the lateral wall of the upper and lower both sides of apron accomodate groove 423 relatively, it has the apron 437 that is used for carrying out the shutoff to the opening to articulate in the apron accomodate the groove 423, be equipped with the second hinge post 437a that stretches into corresponding second hinge hole 424 on the apron 437, be equipped with articulated seat 437b on the apron 437, be equipped with the articulated connecting rod 438 of articulated connection on articulated seat 437b of one end on the articulated seat 437b, the other end of articulated connecting rod 438 articulates on a articulated piece 439, articulated piece 439 overlaps and locates on the guide bar 422 that is located second stopper 482 rear side, the cover is equipped with on the guide bar 422 and is used for promoting articulated piece 439 to laminate second stopper 482 and drives the second spring 425 that the apron 437 was received in apron accomodate the groove 423.

Through the arrangement of the cover plate accommodating groove 423 and the cover plate 437 in the embodiment, the cover plate 437 is rotated out of the cover plate accommodating groove 423 to block the opening of the movable chamber 420, so that dust generated by the movable plate 430 in the process of vibrating and shaking the dust cannot overflow from the opening of the movable chamber 420, and meanwhile, the cover plate 437 can be accommodated in the cover plate accommodating groove 423 to avoid influence on the gas flow in the movable chamber 420 to reduce the air permeability; the second hinge hole 424, the second hinge column 437a, the hinge connecting rod 438 and the hinge block 439 are arranged, so that the hinge block 439 is sleeved on the guide rod 422, the hinge connecting rod 438 is hinged with the cover plate 437 and the hinge block 439, and the hinge block 439 can move along the guide rod 422 to drive the hinge connecting rod 438 to move, so that the cover plate 437 is driven to rotate out of or rotate into the cover plate accommodating groove 423 to block and accommodate the cover plate 437; through the arrangement of the second limiting sliding groove 452, the second limiting block 482, the second threaded hole 481 and the second spring 425, the second limiting block 482 extends out of the second limiting sliding groove 482 to be in press fit with the side wall of the hinge block 439, the rotating rod 436 is threaded through the second threaded hole 481, so that the limiting push ring 443 can be driven to move along the rotating rod 436 when the rotating rod 436 is rotated, and the second spring 425 pushes the hinge block 439 to move forwards all the time, so that the hinge block 439 can move along the guide rod 422 to block and accommodate the cover plate 437; wherein, because the second thread 464 has a certain length, when the rotating rod 436 is rotated to drive the limit push ring 443 to move to the rear end of the second thread 464 and make it lose the fit with the second thread 464, at this time, the cover plate 437 rotates out of the cover plate receiving groove 423 to just block the opening of the movable chamber 420, meanwhile, the second limit spring 444 provides just one force to pull the moving ring 441 backward, then slowly rotating the rotating rod 436 can just drive the moving plate 430 to vibrate back and forth along the guiding rod 422 to shake ash, when the moving plate 430 is located at the foremost side of the guide bar 422 during shaking of ash, the rotating bar 436 is reversely rotated, due to the elastic force of the second spring 425, the limit push ring 443 can move along the second thread 464 to drive the cover plate 437 to rotate and be received in the cover plate receiving groove 423, at this time, the second limit spring 444 provides a backward force to the moving ring 441, so that the moving ring 441 is located at the rotating groove 461 to be relatively rotatable with respect to the rotating rod 436.

In this embodiment, a spring mounting groove 490 having a ring-shaped cross section is disposed at an end of the second threaded rod 435 in the threaded cavity 440, and a damping ring 492 extending out of the spring mounting groove 490 and sleeved on the rotating rod 436 is disposed in the spring mounting groove 490 through a damping spring 491.

With the configuration in the present embodiment, the shock absorbing spring 491 is enabled to absorb the vibration generated by the moving plate 430 hitting the second threaded rod 435 by the buffer ring 492, and the moving plate 430 and the second threaded rod 435 can be effectively protected.

In this embodiment, a buffer ring receiving groove 493 for receiving the buffer ring 492 is disposed at an opening of the spring mounting groove 490.

Through the arrangement of the buffer ring receiving groove 493 in the embodiment, the first spring 434 pushes the sliding block 431 to press the buffer ring 492 so that the buffer ring 492 is located in the buffer ring receiving groove 493 to be received, so that the moving plate 430 can be better in close fit with the front side wall of the moving chamber 420.

In this embodiment, a drawing cavity 426 with an opening facing the front side of the housing 410 is disposed in the bottom plate of the housing 410, and discharge ports 427 penetrating through the drawing cavity 426 and discharging dust are uniformly disposed on the bottom side wall of the moving cavity 420; the drawing cavity 426 is provided with a drawing plate 412 in a sealing fit manner.

Through the arrangement of the discharge port 427 in the present embodiment, the dust vibrated by the moving plate 430 falling within the moving chamber 420 can be discharged from the moving chamber 420 through the discharge port 427; the arrangement of the drawing cavity 426 and the drawing plate 412 enables the drawing plate 412 to extend into the drawing cavity 426 to block the discharge port 427, so as to preferably ensure the air tightness of the movable cavity 420, and meanwhile, the drawing plate 412 is pulled to slide out of the drawing cavity 426 to remove the blocking of the discharge port 427, thereby facilitating the discharge of dust.

In this embodiment, the end of the second threaded rod 435 on the front side of the housing 410 is provided with a stop ring 494 for engaging with the housing 410, preferably to prevent the second threaded rod 435 from rotating into the threaded cavity 440.

In summary, the above-mentioned embodiments are only preferred embodiments of the present invention, and all equivalent changes and modifications made in the claims of the present invention should be covered by the claims of the present invention.

Claims

1. An electric power switch cabinet, includes the cabinet body (310), its characterized in that: a placing cavity (320) with a forward opening is arranged in the cabinet body (310), and a partition plate (321) is arranged in the placing cavity (320); the rear side of the cabinet body (310) and the positions of the upper end and the lower end extend backwards to form mounting parts (310a), and mounting plates (311) are arranged between the mounting parts (310 a); a heat-conducting plate placing cavity (322) with an opening facing the mounting plate (311) is arranged in the partition plate (321), a heat dissipation mechanism for dissipating heat of the placing cavity (320) is arranged in the heat-conducting plate placing cavity (322), the heat dissipation mechanism comprises a heat-conducting plate (323) positioned in the heat-conducting plate placing cavity (322), the heat-conducting plate (323) is connected with a heat dissipation fin (325) through a heat-conducting pipe (324), and heat dissipation fans (326) are uniformly distributed on the heat dissipation fin (325); the mounting plate (311) is provided with an air outlet (312) from which the heat radiation fan (326) extends; wire outlet holes (330) which are positioned at the upper side of the corresponding partition plate (321) are uniformly distributed on the rear side surface of the cabinet body (310), sealing plates (340) which are movable and matched with the side walls of the mounting plates (311) are arranged between the mounting parts (310a) and positioned at the left side and the right side, and air holes (341) are uniformly distributed on the sealing plates (340); a sliding cavity (331) for the corresponding sealing plate (340) to move into is arranged on the rear side wall of the cabinet body (310), the sealing plate (340) is in close fit with the side wall of the sliding cavity (331), and a first sliding groove (332) communicated with the outer side of the cabinet body (310) is arranged on the side wall of the sliding cavity (331) along the front-back direction; be equipped with in sliding chamber (331) slidable and be used for carrying out the baffle (343) of shutoff to bleeder vent (341), sliding closure cooperation between the lateral wall of baffle (343) and closing plate (340), be equipped with on closing plate (340) and stretch out first shifting block (342) that correspond first spout (332), be equipped with on baffle (343) and stretch out second shifting block (344) that correspond first spout (332) and be located first shifting block (342) front side.

2. An electric power switchgear, according to claim 1, characterized in that: mounting seats (313) are arranged on two sides of the mounting plate (311) corresponding to the first sliding grooves (332), a rotatable rotating shaft (314) is arranged on the mounting seats (313), first threads (351) are arranged on the rotating shaft (314), first shifting blocks (342) and second shifting blocks (344) are respectively provided with a first threaded hole (345) for the rotating shaft (314) to penetrate through, and the first threads (351) are in threaded fit with the first threaded holes (345); a cavity (350) is arranged in the rotating shaft (314), first limiting grooves (352) which correspond to each other are formed in the side wall of the cavity (350) along the extending direction of the rotating shaft (314), the length of each first limiting groove (352) is larger than that of each first thread (351), two ends of each first limiting groove (352) are respectively located at two ends of each first thread (351), two slidable spring mounting blocks (353) are arranged in the cavity (350), first limiting blocks which extend out of the corresponding first limiting grooves (352) are arranged on the spring mounting blocks (353), and first limiting springs (354) are connected among the spring mounting blocks (353); the first shifting block (342) and the second shifting block (344) are positioned between the first limit blocks.

3. An electric power switchgear, according to claim 2, characterized in that: the front end of the rotating shaft (314) is provided with a fixing mechanism (315) for fixing the mounting plate (311) between the mounting portions (310a), the fixing mechanism (315) comprises a fixing block (360), the front end of the rotating shaft (314) penetrates through the corresponding fixing block (360) to be arranged, one end of the fixing block (360) penetrates through a first sliding chute (332) to extend into the sliding cavity (331), a first mounting cavity (361) is arranged at the position of the fixing block (360) extending into the sliding cavity (331), an outlet (371) is arranged above the first mounting cavity (361), a hinge rod (380) is hinged in the first mounting cavity (361), and the upper end of the hinge rod (380) can extend out from the outlet (371); a clamping groove (381) for clamping one end of a hinged rod (380) extending out of the outlet (371) is arranged on the side wall of the sliding cavity (331) and above the first sliding groove (332).

4. A power switch cabinet according to claim 3, characterized in that: the front side wall and the rear side wall of the first installation cavity (361) are provided with first hinge holes (372) above the first installation cavity, and the side wall of the hinge rod (380) is provided with a first hinge column (391) extending into the corresponding first hinge hole (372); a driving mechanism (362) used for driving the hinged rod (380) to rotate is arranged in the first installation cavity (361), the driving mechanism (362) comprises a push block (390), a sliding groove (392) for the lower end of the hinged rod (380) to extend into is formed in the push block (390) in the up-down direction, a limiting sliding groove (393) is formed in the side wall, opposite to the sliding groove (392), in the up-down direction, the end portion, extending into the sliding groove (392), of the hinged rod (380) is provided with a sliding column extending into the corresponding limiting sliding groove (393) to slide, and a groove (394) for the first hinged column (391) to be clamped into is formed in the upper end portion of the push block (390); the front side wall of the push block (390) is connected with a first threaded rod (395), and the first threaded rod (395) extends into a rotatable rotating column (363) in a threaded manner; the fixed block (360) is also internally provided with a second mounting cavity (364) for the rotating shaft (314) to penetrate through, a rotating hole (365) for the rotating column (363) to penetrate through is arranged between the first mounting cavity (361) and the second mounting cavity (364), one end of the rotating column (363) is connected with a first bevel gear (366) positioned in the second mounting cavity (364), and the first bevel gear (366) is meshed with a second bevel gear (367) sleeved on the rotating shaft (314).

5. An electric power switchgear, according to claim 4, characterized in that: a side surface of the rotating shaft (314) positioned in the second mounting cavity (364) is provided with a rotating chute (355) with an annular section, and the second bevel gear (367) is provided with a rotating block matched with the rotating chute (355); be located and be equipped with relative second spacing groove (356) along the extending direction of axis of rotation (314) on the lateral wall of cavity (350) in second installation cavity (364), be equipped with on axis of rotation (314) and be used for driving second bevel gear (367) pivoted clutching mechanism, clutching mechanism is including being located movable block (357) that cavity (350) removed, be equipped with the second stopper that stretches out corresponding second spacing groove (356) on movable block (357), be connected with push rod (358) that stretch out cavity (350) on movable block (357), the opening part of cavity (350) is equipped with end cap (359) and push rod (358) pass end cap (359) and set up, the cover is equipped with reset spring (368) that are located cavity (350) and are used for driving movable block (357) antedisplacement on push rod (358).

6. An electric power switchgear, according to claim 5, characterized in that: one end of the second limiting block extending out of the second limiting groove (356) is connected with a friction ring sleeved outside the rotating shaft (314).

7. An electric power switchgear, according to claim 1, characterized in that: a stepped groove (333) used for clamping the mounting plate (311) is arranged on the opposite side wall of the mounting part (310a) and positioned at the rear end.