CN210245990U

CN210245990U - Switch cabinet with efficient pressure relief mechanism

Info

Publication number: CN210245990U
Application number: CN201921149721.3U
Authority: CN
Inventors: Liesong Cai; 蔡烈松
Original assignee: Jiangsu Belijia Electric Co Ltd
Current assignee: Jiangsu Belijia Electric Co Ltd
Priority date: 2019-07-19
Filing date: 2019-07-19
Publication date: 2020-04-03
Anticipated expiration: 2029-07-19

Abstract

The utility model relates to a cubical switchboard technical field, concretely relates to cubical switchboard with high-efficient pressure release mechanism, including cubical switchboard, pressure release mechanism includes flange cover, piston, connecting rod, solid fixed ring, nut, elasticity. The utility model has the advantages that: the high-pressure gas that gathers in the cubical switchboard passes the hole of dodging on the solid fixed ring, under the atmospheric pressure effect, promote the piston and overcome the spring resistance, keep away from solid fixed ring, make its cancellation state with the solid fixed ring surface, consequently gu the solid fixed ring cancels with the airtight seal state of piston face of supporting, gaseous will dodge the hole on by solid fixed ring this moment, the pressure tank gets into the sliding tray on the piston, and discharge to the cubical switchboard outside, because the mode of replacing the bolt, utilize the deformation recovery characteristic of spring, make the pressure release accomplish the back, the piston can offset with the solid fixed ring surface again, continue to protect the cubical switchboard, can repeatedly carry out the pressure release simultaneously, need not the operation personnel and operate, and the labor intensity is reduced.

Description

Switch cabinet with efficient pressure relief mechanism

Technical Field

The utility model relates to a cubical switchboard technical field, concretely relates to cubical switchboard with high-efficient pressure release mechanism.

Background

The main function of the switch cabinet is to open and close, control and protect electric equipment in the process of power generation, power transmission, power distribution and electric energy conversion of an electric power system. The components in the switch cabinet mainly comprise a circuit breaker, an isolating switch, a load switch, an operating mechanism, a mutual inductor, various protection devices and the like. The classification methods of the switch cabinets are various, for example, the switch cabinets can be divided into movable switch cabinets and fixed switch cabinets by the installation mode of the circuit breaker; or according to different cabinet body structures, the cabinet body can be divided into an open type switch cabinet, a metal closed switch cabinet and a metal closed armored switch cabinet; the high-voltage switch cabinet, the medium-voltage switch cabinet, the low-voltage switch cabinet and the like can be divided according to different voltage grades. The method is mainly suitable for various occasions such as power plants, transformer substations, petrochemical industry, metallurgical steel rolling, light industrial textile, industrial and mining enterprises, residential districts, high-rise buildings and the like.

In the operation process of a switch cabinet, under the conditions of insulation aging, human misoperation, design defects of the switch cabinet and the like, a short-circuit fault can occur in a primary loop, a short-circuit current of tens of thousands of amperes is generated, the short-circuit current can instantly generate high-temperature and high-pressure gas, and the switch cabinet can be cracked if fault airflow cannot be effectively released in a short time due to the fact that a cabinet body is narrow, so that the adjacent switch cabinet and workers are seriously damaged, and a major safety accident is caused. Therefore, the switch cabinet is provided with pressure relief measures during design, for example, a bolt fixing cover plate with set strength is arranged at the top of the switch cabinet, which is commonly adopted in the prior art, so that the bolt fails during pressure relief, and the cover plate is opened to realize pressure relief.

Through the bolt inefficacy among the prior art, make the apron can open the mode of carrying out the pressure release, lead to the pressure release after, need install the bolt again, otherwise the bolt can't carry out used repeatedly, such mode has increased operating personnel's intensity of labour undoubtedly, consequently needs to design a cubical switchboard pressure release mechanism that can reuse certain number of times at least.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the problem that exists among the prior art, provide a cubical switchboard with high-efficient pressure release mechanism, it can realize making pressure release mechanism used repeatedly certain number of times at least.

In order to realize the technical purpose, the technical effect is achieved, the utility model discloses a realize through following technical scheme:

a switch cabinet with a high-efficiency pressure relief mechanism comprises a switch cabinet, wherein the top of the switch cabinet is provided with the pressure relief mechanism, the pressure relief mechanism comprises a flange sleeve, a piston, a connecting rod, a fixing ring, a nut and an elastic piece, the flange sleeve comprises a large-diameter end and a small-diameter end, the small-diameter end vertically penetrates through the top wall of the switch cabinet, the large-diameter end is externally leaked at the top of the switch cabinet and detachably connected with the switch cabinet, the flange sleeve is coaxially provided with a sliding groove in a through hole form, the fixing ring is coaxially clamped in a groove at the lower end of the sliding groove and is coaxially provided with a relief hole in a through hole form, the piston is coaxially and slidably matched and hermetically clamped in the sliding groove and is positioned above the fixing ring, the end surface of the piston is provided with a plurality of pressure discharge grooves in the through hole form along the axial array of the piston, the pressure discharge grooves and the relief hole are staggered, so that, the abutting surface is provided with an air seal, the connecting rod is coaxially arranged on the piston and penetrates out of the small-diameter end through the avoidance hole, the outer diameter of the connecting rod is far smaller than the inner diameter of the avoidance hole, the nut is sleeved on one end, penetrating out of the small-diameter end, of the connecting rod in a threaded mode, the elastic piece is arranged between the nut and the fixing ring, the elastic piece abuts against the nut, and the piston is driven to abut against the surface of the fixing ring.

Further, the piston is made of high-temperature-resistant materials.

Furthermore, the elastic part is a spring, the spring is sleeved on the connecting rod, and two ends of the spring in the elastic direction are fixedly connected with the fixing ring and the nut respectively.

Furthermore, a groove is formed in the bottom surface of the switch cabinet.

Furthermore, the bottom of the switch cabinet is provided with a heat dissipation space, the inner bottom wall of the switch cabinet is provided with a plurality of first heat dissipation grooves communicated to the heat dissipation space, at least one outer side wall of the switch cabinet is provided with a plurality of second heat dissipation grooves communicated with the heat dissipation space, the outer wall of the switch cabinet is provided with a heat exhaust pipe communicated with the heat dissipation space, and the heat exhaust pipe is communicated with an external air pump.

Furthermore, the bottom surface of the switch cabinet is provided with a water leakage hole communicated with the heat dissipation space.

The utility model has the advantages that: the high-pressure gas accumulated in the switch cabinet passes through the avoiding hole on the fixing ring, the piston is pushed to overcome the resistance of the spring under the action of air pressure, the piston is far away from the fixing ring, the state of the piston abutting against the surface of the fixing ring is cancelled, therefore, the airtight state of the abutting surface of the fixing ring and the piston is cancelled, at the moment, the gas enters the sliding groove from the avoiding hole on the fixing ring and the pressure groove on the piston and is discharged to the outside of the switch cabinet, due to the mode of replacing a bolt, the deformation recovery characteristic of the spring is utilized, after the pressure relief is finished, the piston can abut against the surface of the fixing ring again, the switch cabinet is continuously protected, the pressure relief can be carried out repeatedly, the operation of operators is not needed, the labor intensity is reduced, and meanwhile, the first heat dissipation groove and the second heat dissipation groove are arranged, so that the high-pressure gas accumulated in the switch cabinet, but also when needing to discharge, can be discharged by first radiating groove, the second radiating groove, reduce prior art on the cubical switchboard radiating fan's radiating pressure, simultaneously because the electrical components of cubical switchboard inside are burnt out by the short circuit, the smoke and dust that produces is heavier than the air, consequently generally gather in the cubical switchboard bottom, so first radiating groove, the setting position of second radiating groove, can guarantee basically that the smoke and dust is discharged, set up the heat extraction pipe simultaneously, through the work of outside air-extracting pump, the smoke and dust that will gather discharges fast, the radiating efficiency is improved, the recess of setting, when making the cubical switchboard have little prominence at the face of placing, the recess can dodge, avoid the cubical switchboard installation back, the bottom is disturbed by the prominence, produce and rock.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

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

FIG. 2 is a schematic view of a three-dimensional structure of the middle pressure relief mechanism of the present invention;

FIG. 3 is an exploded view of the perspective structure of FIG. 2;

the reference numerals are explained below:

1-switch cabinet, 2-piston, 3-connecting rod, 4-fixing ring, 5-nut, 6-large diameter end, 7-small diameter end, 8-sliding groove, 9-avoiding hole, 10-pressure discharge groove, 11-spring, 12-groove, 13-heat dissipation space, 14-first heat dissipation groove, 15-second heat dissipation groove, 16-heat discharge pipe and 17-water leakage hole.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention, and obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1-3, a switch cabinet with a high-efficiency pressure relief mechanism comprises a switch cabinet 1, wherein a heat dissipation space 13 is arranged at the bottom of the switch cabinet 1, a plurality of first heat dissipation grooves 14 communicated with the heat dissipation space 13 are arranged on the inner bottom wall of the switch cabinet 1, a plurality of second heat dissipation grooves 15 communicated with the heat dissipation space 13 are arranged on at least one outer side wall of the switch cabinet 1, a heat dissipation pipe 16 communicated with the heat dissipation space 13 is arranged on the outer wall of the switch cabinet 1, the heat dissipation pipe 16 is communicated with an external air pump, a groove 12 is arranged on the bottom surface of the switch cabinet 1, a pressure relief mechanism is arranged on the top of the switch cabinet 1, the pressure relief mechanism comprises a flange sleeve, a piston 2, a connecting rod 3, a fixing ring 4, a nut 5 and a spring 11, wherein the flange sleeve comprises a large-diameter end 6 and a small-diameter end 7, the small-diameter end 7 vertically penetrates through the switch, the flange is sleeved with a sliding groove 8 coaxially provided with a through hole, the fixing ring 4 is coaxially clamped in a groove port at the lower end of the sliding groove 8, a relief hole 9 in a through hole form is coaxially arranged on the flange, the piston 2 is coaxially and slidably matched and sealed in the sliding groove 8 and is positioned above the fixing ring 4, a plurality of pressure discharge grooves 10 in the through hole form are arranged on the end surface of the fixing ring along the axial array of the piston, the pressure discharge grooves 10 and the relief hole 9 are staggered, so that when the piston 2 abuts against the surface of the fixing ring 4, the abutting surface is provided with an air seal, the connecting rod 3 is coaxially arranged on the piston 2 and penetrates out of the small-diameter end 7 through the relief hole 9, the outer diameter of the connecting rod 3 is far smaller than the inner diameter of the relief hole 9, the nut 5 is sleeved on one end of the connecting rod 3, the spring 11 is sleeved on the connecting rod 3, and two ends in the elastic direction of, Nut 5 rigid coupling, it supports nut 5, the drive piston 2 offsets with solid fixed ring 4 surface, furtherly, piston 2 is made by high temperature resistant material, reduces piston 2 and is damaged by high temperature, leads to the life-span to reduce, simultaneously cubical switchboard 1 bottom surface is equipped with the hole 17 that leaks that communicates heat dissipation space 13 for discharge the inside liquid drop that gathers of cubical switchboard 1.

The utility model discloses when using: after electrical components in the switch cabinet are burnt out due to short circuit and the like, a large amount of gas is generated in the switch cabinet, the gas has higher air pressure, the high-pressure gas accumulated in the switch cabinet passes through the avoiding hole on the fixing ring, under the action of air pressure, the piston is pushed to overcome the resistance of the spring and is far away from the fixed ring, so that the state of the piston abutting against the surface of the fixed ring is cancelled, therefore, the airtight sealing state of the abutting surface of the fixed ring and the piston is cancelled, at the moment, the gas enters the sliding groove from the avoidance hole on the fixed ring and the upper pressure groove on the piston, and is discharged to the outside of the switch cabinet to complete pressure relief, and simultaneously, smoke dust generated by burnt electrical elements is discharged, because the density is higher than that of air, the air is generally settled at the bottom of the switch cabinet and enters the first heat dissipation groove to the heat dissipation space, at the moment, an external power supply can be connected, an external air pump is started, the smoke and dust in the heat dissipation space is discharged through the heat discharge pipe, and meanwhile, the second heat dissipation groove also discharges the smoke and dust.

The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A switch cabinet with a high-efficiency pressure relief mechanism comprises a switch cabinet (1) and is characterized in that the pressure relief mechanism is arranged at the top of the switch cabinet (1) and comprises a flange sleeve, a piston (2), a connecting rod (3), a fixing ring (4), a nut (5) and an elastic piece, wherein the flange sleeve comprises a large-diameter end (6) and a small-diameter end (7), the small-diameter end (7) vertically penetrates through the top wall of the switch cabinet (1), the large-diameter end (6) is leaked at the top of the switch cabinet (1) and detachably connected with the switch cabinet (1), the flange sleeve is coaxially provided with a sliding groove (8) in a through hole form, the fixing ring (4) is coaxially clamped in a groove at the lower end of the sliding groove (8), and is coaxially provided with a yielding hole (9) in a through hole form, the piston (2) is coaxially and slidably matched and hermetically clamped in the sliding groove (8), it is located solid fixed ring (4) top is equipped with row indent (10) of a plurality of through-hole forms along its axial array on its terminal surface, arrange indent (10) and dodge the setting of staggering of hole (9), make when piston (2) and solid fixed ring (4) surface offset, the offset face has airtight, connecting rod (3) coaxial locate on piston (2) and wear out outside path end (7) by dodging hole (9), connecting rod (3) external diameter is far less than dodges hole (9) internal diameter, nut (5) thread bush is served outside path end (7) is worn out in connecting rod (3), the elastic component is located between nut (5), solid fixed ring (4), and its support nut (5), the drive piston (2) and solid fixed ring (4) surface offset.

2. The switch cabinet with the efficient pressure relief mechanism according to claim 1, characterized in that the piston (2) is made of high temperature resistant material.

3. The switch cabinet with the efficient pressure relief mechanism according to claim 1, wherein the elastic member is a spring (11), the spring (11) is sleeved on the connecting rod (3), and two ends of the spring in the elastic direction are respectively fixedly connected with the fixing ring (4) and the nut (5).

4. The switch cabinet with the efficient pressure relief mechanism is characterized in that a groove (12) is formed in the bottom surface of the switch cabinet (1).

5. The switch cabinet with the efficient pressure relief mechanism is characterized in that a heat dissipation space (13) is arranged at the bottom of the switch cabinet (1), a plurality of first heat dissipation grooves (14) communicated with the heat dissipation space (13) are formed in the inner bottom wall of the switch cabinet (1), a plurality of second heat dissipation grooves (15) communicated with the heat dissipation space (13) are formed in at least one outer side wall of the switch cabinet (1), a heat exhaust pipe (16) communicated with the heat dissipation space (13) is formed in the outer wall of the switch cabinet (1), and the heat exhaust pipe (16) is communicated with an external air pump.

6. The switch cabinet with the efficient pressure relief mechanism is characterized in that the bottom surface of the switch cabinet (1) is provided with a water leakage hole (17) communicated with the heat dissipation space (13).