CN114256769A

CN114256769A - High-low voltage switch device with protective performance

Info

Publication number: CN114256769A
Application number: CN202111657105.0A
Authority: CN
Inventors: 徐乐凤; 孙彬; 王和欣; 徐鲁波
Original assignee: TAISHAN SCIENCE AND TECHNOLOGY
Current assignee: TAISHAN SCIENCE AND TECHNOLOGY
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-03-29
Anticipated expiration: 2041-12-31
Also published as: CN114256769B

Abstract

The invention relates to the field of electrical cabinet equipment, and discloses a high-low voltage switch device with protective performance, which is used for installing an electrical cabinet shell of electrical equipment, wherein single cabinets and expansion plates at two ends of the single cabinets form installation cavities with variable volumes and used for installing high-low voltage components, a plurality of installation cavities are also internally provided with contraction airbags used for driving the expansion plates to move, and a mounting frame is also provided with a pneumatic assembly capable of spraying dry powder into the single cabinets. According to the invention, the installation cavity is contracted, so that the expansion of dangerous cases caused by factors such as heat conduction and the like is avoided, and meanwhile, when the expansion plate moves to the maximum degree, the heat dissipation holes are just completely shielded, so that the sealing performance of the installation cavity in emergency is further ensured, the expansion of the dangerous cases is strictly controlled, and the fire in the single cabinet is avoided in a mode of isolating open fire and exhausting air by covering dry powder, so that the further protection operation of the electric cabinet is realized, and the safety of the electric cabinet in use is fully ensured.

Description

High-low voltage switch device with protective performance

Technical Field

The invention relates to the field of electrical cabinet equipment, in particular to a high-low voltage switch device with protection performance.

Background

The electrical cabinet is a cabinet which is processed by steel materials and used for protecting components from working normally. The electrical cabinet manufacturing materials are generally divided into hot rolled steel plates and cold rolled steel plates. The cold-rolled steel sheet is softer than hot-rolled steel sheet, more is fit for the preparation of regulator cubicle. The electric cabinet is widely used in chemical industry, environmental protection industry, electric power system, metallurgical system, industry, nuclear power industry, fire safety monitoring, traffic industry and the like.

In the prior art, chinese patent publication No. CN111478218B discloses an anti-diffusion independent insulation drawer type low-voltage switch cabinet, which implements full wrapping protection of electronic devices in the drawer cabinet through a two-state deformation insulation bag, facilitates attachment of extruded air when the switch is closed, can isolate the inside and outside environment to avoid leakage pollution of sulfur hexafluoride gas, can implement good insulation protection, and improves the overall safety of the low-voltage switch cabinet in use, however, in practical use, although sulfur hexafluoride gas itself is nontoxic, once the high-voltage and low-voltage electrical cabinets have local fault and leakage, sulfur hexafluoride gas is easily decomposed into nearly ten gases, such as thionyl fluoride, sulfuryl fluoride, disulfur decafluoride, sulfur dioxide, sulfur fluoride, HF hydrofluoric acid, and the like under the action of an electric field, and these gases all have certain toxicity, so there is still a certain risk, therefore, a high-low voltage switch device with protection performance is disclosed to meet the installation and control requirements of a high-low voltage switch.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a high-low voltage switch device with protective performance, which has the advantages of high safety and the like, and solves a series of problems that the single cabinets are easy to influence each other and the like due to the fault in the electrical cabinet in the prior art.

(II) technical scheme

In order to achieve the purpose, the invention provides the following technical scheme: a high-low voltage switch device with protection performance comprises an electrical cabinet shell for mounting electrical equipment, wherein a mounting rack for placing a plurality of single cabinets is fixedly mounted in the electrical cabinet shell, the single cabinets are independent and are respectively used for mounting high-low voltage components, telescopic plates are sleeved in the single cabinets in a sliding manner, the single cabinets and the telescopic plates at two ends of the single cabinets form mounting cavities with variable volumes and used for mounting the high-low voltage components, and telescopic air bags for driving the telescopic plates to move are further arranged in the mounting cavities;

the mounting rack is also provided with a pneumatic assembly capable of spraying dry powder into the monomer cabinets, the pneumatic assembly is used for conveying nitrogen and is indirectly communicated with the plurality of shrinkage air bags, the plurality of monomer cabinets are also internally provided with a trigger assembly used for triggering the pneumatic assembly, and the trigger assembly slides corresponding to the expansion plates in the monomer cabinets to form an electrified closed loop;

the gas-liquid separation device is characterized in that the contraction air bag is fixedly communicated with a backflow pipe which is installed at the upper end of the installation cavity and communicated with the installation cavity, an electromagnetic valve which is matched with the backflow pipe is further arranged in the backflow pipe, and the electromagnetic valve is used for discharging nitrogen in the contraction air bag into the installation cavity when the contraction air bag is restored to the original state after expansion.

Preferably, a plurality of monomer cabinets which are uniformly distributed and located on the same straight line are fixedly installed on the installation frame, horizontal sealing guide rails with the same height are fixedly installed on the inner walls of the two opposite sides of the plurality of monomer cabinets, the two ends of the plurality of monomer cabinets are respectively sleeved with the telescopic plates which are attached to the inner walls of the corresponding monomer cabinets in a sliding manner, and the two telescopic plates at the same relative position are respectively clamped on the corresponding horizontal sealing guide rails in a sliding manner;

and a plurality of mounting plates for mounting electrical elements are arranged in the single cabinet, and the horizontal sealing guide rails are all made of hard plastic non-conducting materials.

Preferably, the both ends of monomer cabinet are closed state, and two on the same relative position the equal fixed mounting in one side that the expansion plate carried on the back mutually has the shrink gasbag, it is a plurality of all fixed mounting have with corresponding on the inner wall of monomer cabinet both sides the adaptation seat of shrink gasbag looks adaptation.

Preferably, the opposite sides of the two expansion plates at the same relative position are fixedly provided with an arc-shaped shell for restraining the corresponding contracted air bag position and a plurality of uniformly distributed limiting rings, and the same contracted air bag is sleeved in the plurality of limiting rings at the same side;

it is a plurality of equal fixedly connected with reset spring, and a plurality of on the both sides inner wall of monomer cabinet reset spring's the other end fixed connection respectively is corresponding on the expansion plate, under the natural state, reset spring is used for tautening the expansion plate is pressed close to and is corresponded the adaptation seat.

Preferably, the single cabinet is further provided with heat dissipation holes for heat dissipation of electrical elements, the heat dissipation holes in the single cabinet are vertically and bilaterally symmetrically arranged, two rubber strips corresponding to each other are fixedly mounted on the inner wall of the single cabinet, the two rubber strips in the same single cabinet are located between the two groups of heat dissipation holes, and the rubber strips are made of non-conductive materials and can be tightly attached to one side of the expansion plate on the corresponding side in a sealing state;

when the two expansion plates in the same single cabinet approach to each other to the maximum degree, one side of the two expansion plates can completely shield the plurality of heat dissipation holes on the corresponding side.

Preferably, the rubber strips and the expansion plate at the same relative position are respectively provided with an electrode plate which is matched with each other at one end, and when the expansion plate slides and is jointed with the corresponding rubber strips, the two electrode plates at the corresponding positions are mutually contacted and can trigger the pneumatic assembly.

Preferably, a transverse plate is further fixedly mounted on the mounting frame, the pneumatic assembly comprises a gas storage tank for storing nitrogen, a gas compressor and the gas storage tank are fixedly mounted on the transverse plate, the output end of the gas storage tank is communicated with the input end of the gas compressor, and the output end of the transverse plate is fixedly communicated with a three-way pipe;

and the plurality of contraction air bags are fixedly communicated with communicating pipes, one ends of the communicating pipes penetrate through the corresponding arc-shaped shells and extend to the outside of the monomer cabinet, and one output end of the three-way pipe is provided with a pressure gauge and is communicated with the plurality of communicating pipes through a gas conveying pipe.

Preferably, a powder tank is fixedly mounted on the transverse plate, a sufficient amount of dry powder agent for fire extinguishing is stored in the powder tank, the other output end of the three-way pipe is communicated with the input end of the powder tank, the output end of the powder tank is fixedly communicated with a powder conveying pipe capable of conveying dry powder, the powder conveying pipe is fixedly communicated with a plurality of branch pipes which are respectively communicated with the corresponding monomer cabinets, and each branch pipe is provided with a branch valve.

Preferably, a plurality of the monomer cabinets are further fixedly communicated with pressure relief pipes extending to the outside of one side of the corresponding monomer cabinet, the pressure relief pipes are located between the two rubber strips at the corresponding positions, one-way valves matched with the corresponding pressure relief pipes are further arranged on the pressure relief pipes, and the pressure relief pipes are used for conveying nitrogen to the corresponding monomer cabinets and discharging air in the monomer cabinets.

(III) advantageous effects

Compared with the prior art, the invention provides a high-low voltage switch device with protective performance, which has the following beneficial effects:

1. this high-low voltage switch device with barrier propterty, can realize the air current circulation through the louvre, realize the cooling operation to electrical components in each monomer cabinet, if when circuit trouble appears in a certain monomer cabinet, accomplish quick discernment through monitoring instruments such as the temperature controller that corresponds in the monomer cabinet, and control gas compressor operation, make the shrink gasbag at both ends take place the inflation, it is close to each other to drive the expansion plate, and then reduce the installation cavity that contains electrical components, avoid factors such as heat-conduction to cause the dangerous situation to enlarge, and simultaneously, when the expansion plate removes to the at utmost, shield the louvre completely just, further ensure the leakproofness of installation cavity when taking place emergency, the expansion of strict control dangerous situation.

2. The high-low voltage switch device with protection performance, in the process of reducing the installation cavity under emergency, when the expansion plates at two ends are contacted with corresponding rubber strips, the electrode plates in a power-on loop are actively communicated, thereby triggering a fire extinguishing signal, and actively opening the one-way valve in the input end of the powder tank, so that dry powder particles are sprayed in the installation cavity through the powder conveying pipe and the corresponding branch pipe, meanwhile, nitrogen in the input monomer cabinet is extruded downwards due to lower density and is discharged outwards through a pressure discharge pipe, thereby completing the replacement of oxygen and air in the installation cavity, and avoiding the fire phenomenon in the monomer cabinet by covering and isolating open fire and discharging air through dry powder, further protection operation of the electrical cabinet is realized, so as to fully ensure the safety of the electrical cabinet in use, in addition, when the air bag is contracted, the electromagnetic valves in a backflow pipe are synchronously opened, make the shrink gasbag because of self elasticity self-contraction when, can initiatively discharge its inside nitrogen gas to the upper end of installation cavity through the reflux pipe, equally, because nitrogen gas density is bigger, then will install the inside air of cavity and outwards discharge by the pressure release pipe to the cooperation dry powder is filled, realizes the further abundant isolation inside the installation cavity.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic view of the internal perspective structure of the present invention;

FIG. 3 is a schematic perspective view of another internal perspective of the present invention;

FIG. 4 is a schematic perspective view of the electrical cabinet of the present invention with the housing removed;

FIG. 5 is a schematic view of the internal three-dimensional structure of the single cabinet of the present invention;

FIG. 6 is a schematic sectional view of the single cabinet of the present invention;

FIG. 7 is a schematic view of a single cabinet of the present invention in another perspective view;

fig. 8 is a schematic internal perspective view of the present invention.

In the figure: 1. an electrical cabinet housing; 2. a mounting frame; 3. a single cabinet; 4. a horizontal seal guide rail; 5. a retractable plate; 6. contracting the air bag; 7. an arc-shaped shell; 8. a limiting ring; 9. an adapter base; 10. a return spring; 11. heat dissipation holes; 12. a rubber strip; 13. an electrode sheet; 14. a transverse plate; 15. a gas compressor; 16. a gas storage tank; 17. a three-way pipe; 18. a gas delivery pipe; 19. a communicating pipe; 20. a powder tank; 21. a powder delivery pipe; 22. a pressure relief pipe; 23. a one-way valve; 24. and a reflux pipe.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As described in the background of the invention, the prior art has shortcomings, and in order to solve the above technical problems, the present application provides a high-low voltage switching device with protection performance.

In a typical embodiment of the application, as shown in fig. 1 to 8, a high-low voltage switch device with a protection performance includes an electrical cabinet housing 1 for mounting electrical equipment, a mounting frame 2 for placing a plurality of single cabinets 3 is fixedly mounted in the electrical cabinet housing 1, the plurality of single cabinets 3 are independent and are respectively used for mounting high-low voltage components, a plurality of single cabinets 3 are slidably sleeved with expansion plates 5, the single cabinets 3 and the expansion plates 5 at two ends thereof form mounting cavities for variable volumes and mounting the high-low voltage components, and the plurality of mounting cavities are also internally provided with contraction airbags 6 for driving the expansion plates 5 to move;

the variable volume is defined as the volume of the mounting cavity that is made variable, i.e. the volume of the mounting cavity changes, with the movement of the telescopic plate 5.

The mounting rack 2 is also provided with a pneumatic assembly capable of spraying dry powder into the monomer cabinets 3, the pneumatic assembly is used for conveying nitrogen and is indirectly communicated with the plurality of shrinkage air bags 6, the plurality of monomer cabinets 3 are also internally provided with a trigger assembly used for triggering the pneumatic assembly, and the trigger assembly slides through the expansion plates 5 corresponding to the monomer cabinets 3 to form an electrified closed loop;

the upper end of the installation cavity is fixedly communicated with a backflow pipe 24 which is arranged at the upper end of the installation cavity and communicated with the installation cavity, an electromagnetic valve which is matched with the backflow pipe 24 is further arranged in the backflow pipe 24, and the electromagnetic valve is used for discharging nitrogen in the contraction air bag 6 into the installation cavity in the process of recovering to the original state after the contraction air bag 6 expands.

Further, in above-mentioned scheme, fixed mounting has a plurality of monomer cabinets 3 that distribute evenly and lie in the collinear on the mounting bracket 2, equal fixed mounting has highly uniform horizontal seal guide rail 4 on the both sides inner wall that a plurality of monomer cabinets 3 are relative, and the equal slip cap in both ends of a plurality of monomer cabinets 3 is equipped with the expansion plate 5 of laminating mutually with 3 inner walls of monomer cabinet that correspond, and two expansion plates 5 on the same relative position are sliding fit respectively on the horizontal seal guide rail 4 that corresponds, and guarantee expansion plate 5 and horizontal seal guide rail 4 sealing contact. The arrangement of the horizontal sealing guide rail 4 and the expansion plate 5 which are in close contact with each other can ensure that the expansion plate 5 is stably pushed to slide by the subsequent contraction air bag 6 to avoid the phenomenon of clamping, ensure the sealing degree of the installation cavity and avoid the phenomenon of electric leakage when emergency measures are implemented;

in this embodiment, all be equipped with the mounting panel that is used for installing electrical components in a plurality of monomer cabinets 3, and the equal preferred plastics non-conductive material of prior art of a plurality of horizontal seal guide rails 4, for example PVC plastics or phenolic plastics, adopt non-conductive material, lead to the electric leakage when avoiding the installation cavity internal electric field that appears.

Further, each of the plurality of horizontal sealing rails 4 is preferably made of a prior art rigid plastic non-conductive material, such as rigid PVC plastic.

As an implementation manner in this embodiment, the both ends of monomer cabinet 3 are the closed state, and the equal fixed mounting in one side that two expansion plates 5 on the same relative position carried on the back mutually has shrink gasbag 6, equal fixed mounting have with the adaptation seat 9 of the 6 looks adaptations of shrink gasbag that correspond on the inner wall of a plurality of 3 both sides of monomer cabinet, through setting up the adaptation seat 9 with 6 looks adaptations of shrink gasbag for when 6 expansions of shrink gasbag, extrude each other and reversely promote expansion plate 5 with adaptation seat 9 and remove in opposite directions.

Further, in the above scheme, an arc-shaped shell 7 and a plurality of evenly distributed spacing rings 8 for restraining the positions of the corresponding contraction airbags 6 are fixedly installed on the opposite sides of the two expansion plates 5 at the same relative position, the same contraction airbag 6 is sleeved in the spacing rings 8 at the same side, and the expansion direction of the contraction airbag 6 can be effectively restrained by arranging the arc-shaped shell 7 and the spacing rings 8, so that the expansion plates 5 are stably pushed to complete linear displacement;

in this embodiment, equal fixedly connected with reset spring 10 on the both sides inner wall of a plurality of monomer cabinets 3, and the other end difference fixed connection of a plurality of reset spring 10 is on the expansion plate 5 that corresponds, under the natural state, reset spring 10 is used for taut expansion plate 5 to press close to corresponding adaptation seat 9, after setting up reset spring 10, after accomplishing the reduction operation back to the installation cavity under emergency, gas in the telescopic shrink gasbag 6 can be taken out, make the expansion plate 5 of both sides accomplish the initiative and reset fast under the effect of spring.

As an implementation manner in this embodiment, the single cabinet 3 is further provided with heat dissipation holes 11 for heat dissipation of electrical elements, and the heat dissipation holes 11 in the single cabinet 3 are vertically and bilaterally symmetrically arranged, two rubber strips 12 corresponding in position are further fixedly mounted on the inner wall of the single cabinet 3, and two rubber strips 12 in the same single cabinet 3 are located between two sets of heat dissipation holes 11, the rubber strips 12 are made of non-conductive materials (such as natural rubber or other insulating rubber in the prior art) and can be tightly attached to one side of the expansion plate 5 on the corresponding side in a sealed state, by arranging the rubber strips 12 and matching with a common extrusion effect of the shrinkage air bag 6, the expansion plate 5 is made not to easily affect the sealing performance in the installation cavity due to air pressure change caused by a fault in the installation cavity, and the safety in the single cabinet 3 in an emergency state is improved;

in this embodiment, when two expansion plates 5 in the same monomer cabinet 3 are close to each other to the at utmost, one side of two expansion plates 5 can shield a plurality of louvres 11 that correspond the side completely, and under the natural state, accessible louvre 11 carries out cooling treatment to each electrical components in the monomer cabinet 3, and when emergency appeared, the reduction of cooperation installation cavity was accomplished the operation of shielding louvre 11 simultaneously, ensured the complete sealing of internal environment.

Further, in the above scheme, the trigger assembly includes electrode slice 13, and rubber strip 12 on the same relative position all is equipped with the electrode slice 13 of looks adaptation on one end of expansion plate 5, and when expansion plate 5 slided and laminated with corresponding rubber strip 12 mutually, thereby two electrode slices 13 on the corresponding position contacted each other and formed the circular telegram return circuit, trigger pneumatic assembly promptly, through setting up electrode slice 13 for when emergency appears, reduce the installation cavity and accomplish sealed while also can initiatively trigger pneumatic assembly and accomplish the operation of covering in monomer cabinet 3.

As an implementation manner in this embodiment, a transverse plate 14 is further fixedly mounted on the mounting bracket 2, the pneumatic component includes a gas storage tank 16 for storing nitrogen, a gas compressor 15 and the gas storage tank 16 are fixedly mounted on the transverse plate 14, an output end of the gas storage tank 16 is communicated with an input end of the gas compressor 15, an output end of the transverse plate 14 is fixedly communicated with a three-way pipe 17, and nitrogen is used to fill the interior of the monomer cabinet 3, so that gas decomposition influence caused by using sulfur hexafluoride gas can be avoided, and the safety of the monomer cabinet 3 is further improved;

in this embodiment, all fixed intercommunication has one end to run through corresponding arc casing 7 and extend to the communicating pipe 19 outside monomer cabinet 3 on a plurality of shrink gasbag 6, and one of them output of three-way pipe 17 is equipped with the manometer and communicates through gas delivery pipe 18 and a plurality of communicating pipe 19 homogeneous phases, through setting up three-way pipe 17, can set up the valve according to the feedback cooperation of manometer and use in corresponding pipeline (communicating pipe 19 and the branch pipeline on the three-way pipe 17), controls nitrogen gas circulation rate and flow distribution in each pipeline.

As an implementation manner in this embodiment, a powder tank 20 is further fixedly mounted on the horizontal plate 14, a sufficient amount of dry powder agent for fire extinguishing is stored in the powder tank 20, another output end of the three-way pipe 17 is communicated with an input end of the powder tank 20, an output end of the powder tank 20 is fixedly communicated with a powder conveying pipe 21 capable of conveying dry powder, the powder conveying pipe 21 is fixedly communicated with a plurality of branch pipes respectively communicated with the corresponding monomer cabinets 3, the plurality of branch pipes are respectively provided with a branch valve, emergency treatment can be independently controlled on each monomer cabinet 3 through the plurality of branch pipes and the branch valves, in addition, a one-way valve is further required to be arranged at the input end of the powder tank 20 to prevent dry powder particles in the powder tank 20 from being sucked into the three-way pipe 17 to cause blockage when the gas compressor 15 reversely operates to store the deflate the deflating air bag 6, in addition, when the deflating air bag 6 is deflated, the solenoid valve in the backflow pipe 24 is opened in step for when the contraction air bag 6 contracts by self elasticity, the nitrogen gas in the contraction air bag can be actively discharged to the upper end of the installation cavity body through the backflow pipe 24, the air in the installation cavity body is discharged outwards through the pressure relief pipe 22, then the follow-up dry powder is filled, and the inside of the installation cavity body is fully isolated.

Furthermore, in the above solution, the plurality of single cabinets 3 are also fixedly communicated with a pressure relief pipe 22 extending to the outside of one side of the corresponding single cabinet 3, the pressure relief pipe 22 is positioned between the two rubber strips 12 at the corresponding positions, the pressure relief pipe 22 is further provided with a one-way valve 23 matched with the corresponding pressure relief pipe 22, the pressure relief pipe 22 is used for discharging air when conveying nitrogen into the corresponding monomer cabinet 3, when an emergency occurs in the corresponding single cabinet 3, the gas compressor 15 is operated to transport the dry powder particles in the powder tank 20 into the single cabinet 3 through the powder transport pipe 21 and the corresponding branch pipe, thereby avoiding the occurrence of line short circuit and fire, meanwhile, the density of the nitrogen is less than that of the air, the air is promoted to sink and is discharged through the pressure relief pipe 22, thereby cooperate check valve 23, accomplish the nitrogen gas filling in monomer cabinet 3, isolated air further improves the ability of preventing catching fire.

The working principle of the invention is as follows: when the electrical cabinet shell 1 is used, electrical components in each single cabinet 3 normally operate, air flow circulation can be realized through the heat dissipation holes 11, cooling operation of the electrical components in each single cabinet 3 is realized, if a line fault occurs in a certain single cabinet 3, rapid identification is completed through monitoring instruments such as a temperature controller and the like in the corresponding single cabinet 3, and the operation of the gas compressor 15 is controlled, so that nitrogen gas in the gas storage tank 16 is conveyed to the contraction air bags 6 in the corresponding single cabinet 3 through the three-way pipe 17 and the gas conveying pipe 18, the contraction air bags 6 at two ends expand, so that two expansion plates 5 at the same relative position are close to each other under the guiding seal of the horizontal sealing guide rail 4, further, the installation cavity containing the electrical components is reduced, the dangerous situation expansion caused by factors such as heat conduction is avoided, and meanwhile, when the expansion plates 5 move to the maximum degree, the heat dissipation holes 11 are completely shielded, so that the sealing performance of the installation cavity is further ensured when an emergency occurs, and dangerous expansion is strictly controlled;

in the process of reducing the installation cavity, when the expansion plates 5 at two ends are in contact with the corresponding rubber strips 12, the electrode plates 13 in the power-on loop are actively communicated, so that a fire extinguishing signal is triggered, the one-way valve in the input end of the powder tank 20 is actively opened, partial nitrogen in the gas storage tank 16 sprays dry powder particles in the powder tank 20 into the installation cavity through the powder conveying pipe 21 and the corresponding branch pipes, meanwhile, due to the fact that the density of the nitrogen input into the monomer cabinet 3 is low, air is extruded downwards and is discharged outwards through the pressure discharge pipe 22, replacement of oxygen and air in the installation cavity is completed, and therefore the fire phenomenon in the monomer cabinet 3 is avoided through the mode that the dry powder covers and isolates open fire and discharges the air, further protection operation of the electric cabinet is achieved, and safety of the electric cabinet in use is fully guaranteed;

in addition, when shrink gasbag 6 contracts, open the solenoid valve in the backflow pipe 24 in step for shrink gasbag 6 is because of self elasticity self-contraction, can initiatively discharge its inside nitrogen gas to the upper end of installation cavity through backflow pipe 24, and is same, because nitrogen gas density is bigger, then outwards discharges the inside air of installation cavity by pressure release pipe 22, thereby the cooperation dry powder is filled, realizes further fully isolated to the installation cavity is inside.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a high-low voltage switchgear with barrier propterty, is including being used for installing electrical equipment's regulator cubicle casing (1), fixed mounting has mounting bracket (2) that are used for placing a plurality of monomer cabinets (3) in regulator cubicle casing (1), and is a plurality of monomer cabinet (3) are independent separately and equally divide and do not be used for installing high-low voltage components and parts, its characterized in that: telescopic plates (5) are sleeved in the single cabinets (3) in a sliding manner, the single cabinets (3) and the telescopic plates (5) at the two ends of the single cabinets form installation cavities with variable volume and used for installing the high-voltage and low-voltage components, and contraction air bags (6) used for driving the telescopic plates (5) to move are arranged in the installation cavities;

the mounting rack (2) is further provided with a pneumatic assembly capable of spraying dry powder into the single cabinets (3), the pneumatic assembly is used for conveying nitrogen and is indirectly communicated with the plurality of shrinkage air bags (6), trigger assemblies used for triggering the pneumatic assembly are further arranged in the single cabinets (3), and the trigger assemblies form an electrified closed loop by sliding corresponding to the expansion plates (5) in the single cabinets (3);

the upper end of the installation cavity is fixedly communicated with a backflow pipe (24) which is communicated with the upper end of the installation cavity, the backflow pipe (24) is internally provided with an electromagnetic valve which is matched with the backflow pipe, and the electromagnetic valve is opened to enable the inflated shrinkage air bag (6) to recover to the original state and discharge nitrogen in the shrinkage air bag (6) to the installation cavity.

2. A high-low voltage switchgear with protection according to claim 1, characterized in that: a plurality of monomer cabinets (3) which are uniformly distributed and are positioned on the same straight line are fixedly installed on the installation rack (2), horizontal sealing guide rails (4) with the same height are fixedly installed on the inner walls of two opposite sides of the monomer cabinets (3), the two ends of each monomer cabinet (3) are sleeved with the expansion plates (5) which are attached to the inner walls of the corresponding monomer cabinets (3) in a sliding manner, and the two expansion plates (5) at the same relative position are respectively clamped on the corresponding horizontal sealing guide rails (4) in a sliding manner;

a plurality of mounting plates for mounting electrical elements are arranged in the single cabinet (3), and the horizontal sealing guide rails (4) are all made of hard plastic non-conducting materials.

3. A high-low voltage switchgear with protection according to claim 2, characterized in that: the both ends of monomer cabinet (3) are the closure state, and two on the same relative position the equal fixed mounting in one side that expansion plate (5) carried on the back mutually has shrink gasbag (6), and is a plurality of equal fixed mounting has and corresponds on the inner wall of monomer cabinet (3) both sides adaptation seat (9) of shrink gasbag (6) looks adaptation.

4. A high-low voltage switchgear with protection according to claim 3, characterized in that: an arc-shaped shell (7) used for restraining the corresponding contraction air bag (6) and a plurality of evenly-distributed limiting rings (8) are fixedly arranged on the opposite sides of the two expansion plates (5) at the same relative position, and the same contraction air bag (6) is sleeved in the limiting rings (8) on the same side;

a plurality of equal fixedly connected with reset spring (10) on the both sides inner wall of monomer cabinet (3), and a plurality of reset spring (10) the other end fixed connection respectively is in corresponding on expansion plate (5), under the natural state, reset spring (10) are used for taut expansion plate (5) are pressed close to and are corresponded adaptation seat (9).

5. A high-low voltage switchgear with protection according to claim 3, characterized in that: the single cabinet (3) is further provided with heat dissipation holes (11) for heat dissipation of electrical elements, the heat dissipation holes (11) in the single cabinet (3) are vertically and bilaterally symmetrically arranged, two rubber strips (12) corresponding in position are fixedly mounted on the inner wall of the single cabinet (3), the two rubber strips (12) in the same single cabinet (3) are located between the two groups of heat dissipation holes (11), and the rubber strips (12) are made of non-conductive materials and can be tightly attached to one side of the expansion plate (5) on the corresponding side in a sealing state;

when the two expansion plates (5) in the same single cabinet (3) are close to each other to the maximum degree, one side of the two expansion plates (5) can completely shield the plurality of heat dissipation holes (11) on the corresponding side.

6. A high-low voltage switch device with protection performance according to claim 5, characterized in that: rubber strip (12) on same relative position all are equipped with electrode slice (13) of looks adaptation with one of expansion plate (5) is served, when expansion plate (5) slide and with correspond rubber strip (12) when laminating mutually, two on the corresponding position electrode slice (13) contact each other and can trigger pneumatic component.

7. A high-low voltage switchgear with protection according to claim 4, characterized in that: a transverse plate (14) is further fixedly mounted on the mounting rack (2), the pneumatic assembly comprises a gas storage tank (16) for storing nitrogen, a gas compressor (15) and the gas storage tank (16) are fixedly mounted on the transverse plate (14), the output end of the gas storage tank (16) is communicated with the input end of the gas compressor (15), and the output end of the transverse plate (14) is fixedly communicated with a three-way pipe (17);

and the plurality of contraction air bags (6) are fixedly communicated with communicating pipes (19) of which one ends penetrate through the corresponding arc-shaped shells (7) and extend out of the monomer cabinet (3), and one output end of the three-way pipe (17) is provided with a pressure gauge and is communicated with the plurality of communicating pipes (19) through a gas conveying pipe (18).

8. A high-low voltage switchgear with protection according to claim 7, characterized in that: the fire extinguishing device is characterized in that a powder tank (20) is further fixedly mounted on the transverse plate (14), sufficient dry powder agent for fire extinguishing is stored in the powder tank (20), the other output end of the three-way pipe (17) is communicated with the input end of the powder tank (20), the output end of the powder tank (20) is fixedly communicated with a powder conveying pipe (21) capable of conveying dry powder, the powder conveying pipe (21) is fixedly communicated with a plurality of branch pipes which are respectively communicated with the corresponding monomer cabinet (3), and the branch pipes are provided with branch valves.

9. A high and low voltage switching device with protection performance according to claim 6, characterized in that: the rubber strip pressure-relief pipe pressure-relief device is characterized in that a plurality of pressure-relief pipes (22) extending to the outside of one side of the corresponding single cabinet (3) are fixedly communicated with the single cabinet (3), the pressure-relief pipes (22) are located between the two rubber strips (12) at the corresponding positions, one-way valves (23) matched with the corresponding pressure-relief pipes (22) are further arranged on the pressure-relief pipes (22), and the pressure-relief pipes (22) are used for conveying nitrogen to the corresponding single cabinet (3) and discharging air therein.