CN214280625U - Low-voltage power distribution cabinet - Google Patents

Abstract

The utility model discloses a low-voltage distribution cabinet, including the cabinet body with install in the pressure release structure at cabinet body top, the cabinet body includes the roof, the pressure release mouth has been seted up on the roof edge on the roof the circumference of pressure release mouth is provided with the side seal board, the pressure release structure including the apron with the side seal board, the apron is including the apron body and being located first curb plate, the second curb plate of the relative both sides of apron body, first curb plate fixed connection in on the side seal board, a plurality of U-shaped grooves have been seted up on the second curb plate, the side seal board with the through-hole has been seted up to the corresponding position department in U-shaped groove. The application provides a low-voltage distribution cabinet, simple structure under fine control manufacturing cost's prerequisite, instantaneous production's pressure when can the emergence arcing trouble in the quick release switch board has greatly improved the security performance of switch board.

Description

Low-voltage power distribution cabinet

Technical Field

The application relates to the technical field of power equipment, in particular to a low-voltage power distribution cabinet.

Background

In an electric power system, a power distribution cabinet is a common power supply device, and is widely applied to various industries as a final-stage device of the power distribution system. The power distribution cabinet is an effective management means which is adopted for ensuring safe and stable operation of a power grid, external reliable power supply and orderly operation of various power production works.

In recent years, the safety of arc faults inside power distribution cabinets is receiving more and more attention. The arc effects generated during fault arc burning inside the distribution cabinet include pressure effects, thermal effects, radiation and acoustic effects. These arc effects are energetic and can damage equipment within the cabinet and cause injury to nearby personnel. Each power distribution cabinet manufacturer takes various measures for strengthening the switch cabinet to protect the arcing fault of the switch cabinet, and not only strictly ensures the manufacturing quality of switch equipment and carries out correct maintenance and operation accidents according to related regulations, but also must design and configure a pressure relief structure with quick action, so that once the internal arcing fault occurs, energy can be quickly guided to release, and equipment and personnel are protected from being injured to the maximum extent.

At present, in order to release the gas pressure that the inside electric arc fault of switch board produced, generally set up pressure release structure at cabinet body top, wherein pressure release structure is enclosed by pressure release apron and side seal board, because the pressure release apron is that the dead installation of fixed lock is on the side seal board, when taking place the short circuit arcing trouble in the switch board, inside electric arc energy is huge, can produce high temperature in the twinkling of an eye in the cabinet, high pressure, under this kind of situation, the high pressure of instantaneous production can not be quick, release smoothly outside the cabinet, can cause the damage to the internal various equipment of cabinet and the cabinet body.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects in the prior art, the application provides a low-voltage power distribution cabinet which is simple in structure, can quickly release the pressure generated in the power distribution cabinet when arcing faults occur on the premise of well controlling the production cost, and greatly improves the safety performance of the power distribution cabinet.

The utility model discloses a following technical scheme realizes: a low-voltage power distribution cabinet comprises a cabinet body and a pressure relief structure arranged at the top of the cabinet body, wherein the cabinet body comprises a top plate, a pressure relief opening is formed in the top plate, side sealing plates are arranged on the top plate along the circumferential direction of the pressure relief opening, the pressure relief structure comprises a cover plate and the side sealing plates, the cover plate comprises a cover plate body, a first side plate and a second side plate, the first side plate and the second side plate are positioned on two opposite sides of the cover plate body, the first side plate is fixedly connected to the side sealing plates, a plurality of U-shaped grooves are formed in the second side plate, through holes are formed in the side sealing plates at positions corresponding to the U-shaped grooves, bolts penetrate through openings of the U-shaped grooves and are arranged in the through holes, and the second side plate is connected to the side sealing plates; when the switch board takes place the arcing trouble, the gas pressure that produces can follow one side of second curb plate backs down the apron, and then gas pressure is released to the external environment.

According to the low-voltage power distribution cabinet, the pressure relief structure is arranged at the top of the cabinet body, the pressure relief structure is arranged at the pressure relief opening on the top plate and comprises a side sealing plate and a cover plate, the side sealing plate and the cover plate are annularly arranged on the pressure relief opening, the cover plate comprises a cover plate body, a first side plate and a second side plate, the first side plate and the second side plate are positioned on two opposite sides of the cover plate body, the first side plate is fixedly connected to the side sealing plate, a plurality of U-shaped grooves are formed in the second side plate, the side sealing plate is provided with through holes at positions corresponding to the U-shaped grooves, and bolts penetrate through openings of the U-shaped grooves and are installed in the through holes so as to movably connect the second side plate to the side sealing plate; when the arcing trouble takes place for the switch board, because the bolt is the opening part of joint at the U-shaped groove, the gas pressure of production breaks away from the opening of U-shaped groove from the surface of bolt more easily to can follow one side back-up cover plate of second curb plate, and then the instantaneous gas pressure that the arcing trouble produced can be released to the external environment fast in, avoided causing the damage to each equipment of the internal cabinet and whole switch board.

This low-voltage distribution cabinet simple structure, simple to operate under fine control manufacturing cost's prerequisite, instantaneous production's pressure when can the interior emergence arcing trouble of quick release switch board has greatly improved the security performance of switch board. Simultaneously, through set up a plurality of louvres on the side seal board, can also give off the heat that the internal production of cabinet to the external environment fast, reduced the influence of temperature rise to each part of the internal of cabinet, improved the work efficiency of switch board.

In a possible design, the first side plate is provided with a plurality of strip-shaped holes along the length direction to form a weak area, and when the power distribution cabinet has arcing faults, the cover plate is bent outwards and pushed open by taking the weak area as the axial direction.

In a possible design, the first side plate is further provided with a plurality of fixing holes, the fixing holes are located on one side of the weak area, which deviates from the cover plate, and the fixing holes are used for fixedly connecting the first side plate to the side sealing plate.

In one possible design, the side sealing plate is provided with a plurality of heat dissipation holes.

In one possible design, the inner side of the side sealing plate is circumferentially provided with a dustproof filter screen.

In a possible design, a fan is fixedly mounted on the inner side wall of the cover plate body, so that the exchange between gas in the cabinet body and external environment gas is accelerated.

In a possible design, the upper edge of the side sealing plate is bent outwards to form a bending part, the bending part comprises a transverse part and a longitudinal part, and the first side plate and the second side plate are respectively connected to the outer side wall of the longitudinal part.

In one possible design, the lower edges of the side sealing plates are outwardly formed with third side plates, and the side sealing plates are fixedly connected with the top plate through the third side plates.

In one possible design, the pressure relief structure is made by an integral molding process.

In one possible embodiment, a sealing ring is arranged between the cover plate and the side sealing plate.

Drawings

Fig. 1 is a schematic overall structural diagram of a low-voltage power distribution cabinet provided in an embodiment of the present application;

fig. 2 is a schematic structural diagram of a pressure relief structure provided in an embodiment of the present application;

fig. 3 is a schematic structural diagram of a cover plate provided in an embodiment of the present application;

fig. 4 is an exploded view of a pressure relief structure provided in an embodiment of the present application.

Reference numerals: 100. a cabinet body; 110. a top plate; 111. a pressure relief port; 200. a pressure relief structure; 210. a side sealing plate; 211. heat dissipation holes; 212. a dustproof filter screen; 213. a transverse portion; 214. a longitudinal portion; 215. a third side plate; 220. a cover plate; 221. a cover plate body; 222. a first side plate; 223. a second side plate; 224. a U-shaped groove; 225. a strip-shaped hole; 226. a fixing hole; 227. a through hole; 228. and (7) installing holes.

Detailed Description

The technical solution in the present application will be described below with reference to the accompanying drawings. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments.

In the following, the terms "first", "second", "third", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first," "second," "third," etc. may explicitly or implicitly include one or more of the features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

It should be noted that the same reference numerals are used to denote the same components or parts in the embodiments of the present application, and for the same parts in the embodiments of the present application, only one of the parts or parts may be given the reference numeral, and it should be understood that the reference numerals are also applicable to the other same parts or parts.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In the description of the present application, it is to be understood that the terms "upper", "lower", "side", "inner", "outer", and the like indicate orientations or positional relationships based on installation, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.

In the description of the present application, it should be noted that the term "and/or" is only one kind of association relationship describing an associated object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone.

The application provides a low-voltage distribution cabinet, this low-voltage distribution cabinet can be applied to in various low-voltage distribution systems such as power plant, transformer substation, industrial and mining enterprise, building hotel, municipal construction, transportation, as distribution, motor and consumer's control, illumination, power conversion, power compensation etc. use, satisfy the demand of various power supplies, distribution.

Fig. 1 is an overall structural schematic diagram of a low-voltage distribution cabinet provided in an embodiment of the present application. Fig. 2 is a schematic structural diagram of a pressure relief structure provided in the embodiment of the present application. Fig. 3 is a schematic structural diagram of a cover plate provided in the embodiment of the present application. Fig. 4 is an exploded view of a pressure relief structure provided in an embodiment of the present application.

As shown in fig. 1, the present application provides a low voltage distribution cabinet, which includes a cabinet 100 and a pressure relief structure 200 installed on the top of the cabinet 100.

As shown in fig. 1, 2 and 4, the cabinet 100 includes a top plate 110, a pressure relief opening 111 is formed in the top plate 110, and a side sealing plate 210 is disposed on the top plate 110 along a circumferential direction of the pressure relief opening 111.

The pressure relief structure 200 includes a cover plate 220 and a side closure plate 210.

Here, the inside of the cabinet 100 and the inside of the pressure relief structure 200 may communicate with each other through the pressure relief port 111.

As shown in fig. 3, the cover 220 includes a cover body 221 and first and second side plates 222 and 223 located at opposite sides of the cover body 221.

In the present application, as shown in fig. 4, the first side plate 222 is fixedly connected to the side sealing plate 210.

In other embodiments, the first side plate 222 may also be hinged to the side sealing plate 210. For example, the first side plate 222 and the side closing plate 210 may be hinged by a rotating shaft, a hinge, or the like. The application is not limited to the manner of articulation between the two.

As shown in fig. 2 and 3, the second side plate 223 has a plurality of U-shaped grooves 224, the side sealing plate 210 has through holes 227 at positions corresponding to the U-shaped grooves 224, and bolts are inserted into the through holes 227 through the openings of the U-shaped grooves 224 to connect the second side plate 223 to the side sealing plate 210.

Here, the opening width of the U-shaped groove 224 may be adapted to the outer diameter of the through hole 227, and the bolt may be engaged in the opening of the U-shaped groove 224 and installed in the through hole 227 through the opening of the U-shaped groove 224, so that the second side plate 223 may be movably connected to the side sealing plate 210, that is, the second side plate 223 and the side sealing plate 210 may be loosely connected.

The number of U-shaped grooves is not limited in the present application. For example, the number of the cells may be 2, 3, 4, or the like.

When a arcing fault occurs in the switch cabinet, the generated gas pressure can push the cover plate 220 open from one side of the second side plate 223, and then the gas pressure is released to the external environment.

Specifically, when the arcing trouble takes place for the switch board, because the bolt is the joint at the opening part of U-shaped groove 224, the gas pressure of production breaks away from the opening of U-shaped groove 224 from the surface of bolt more easily to gas pressure can push open the apron 220 from one side of second curb plate 223, and then the instantaneous gas pressure that the arcing trouble produced can be released to the external environment fast in, has avoided causing the damage to each equipment in the cabinet body 100 and whole switch board.

The low-voltage power distribution cabinet has the advantages that the structure is simple, the pressure generated in the power distribution cabinet in the instantaneous process of arcing faults can be quickly released on the premise of well controlling the production cost, and the safety performance of the power distribution cabinet is greatly improved.

Optionally, as shown in fig. 3 and 4, the first side plate 222 is provided with a plurality of bar-shaped holes 225 along the length direction to form a weak area, and when the power distribution cabinet has an arcing fault, the cover plate 220 is bent outward and pushed open with the weak area as the axial direction.

Here, a plurality of bar holes 225 are opened along length direction to first curb plate 222, and first curb plate 222 forms the weak area at the position of a plurality of bar holes 225, because the weak area is buckling deformation relatively easily under gas pressure, when the switch board takes place the arcing trouble, apron 220 can regard this weak area as the outside bending of axial and is backed out.

Meanwhile, due to the existence of the weak area, in the process that the cover plate 220 is pushed open, the weak area is easily subjected to concentrated impact of gas pressure to generate deformation, so that impact force on the other three sides of the cover plate 220 can be reduced, impact deformation on the other three sides of the cover plate 220 is avoided, the service life of the cover plate 220 is prolonged, and economic cost is saved.

Optionally, as shown in fig. 4, a plurality of fixing holes 226 are further formed in the first side plate 222, the fixing holes 226 are located on a side of the weak area away from the cover plate 220, and the fixing holes 226 are used for fixedly connecting the first side plate 222 to the side sealing plate 210.

Here, as shown in fig. 4, the upper edge of the side sealing plate 210 is bent outward to form a bent portion, the bent portion includes a transverse portion 213 and a longitudinal portion 214, the longitudinal portion 214 has a plurality of mounting holes 228 at positions corresponding to the plurality of fixing holes 226, and the first side plate 222 is fixedly connected to the side sealing plate 210 after the fasteners pass through the fixing holes 226 and the mounting holes 228.

Alternatively, the fastening member may be any one of a bolt, a screw, a pin, a rivet, and the like, which is not limited in this application.

As shown in fig. 3 and 4, the fixing hole 226 is located on one side of the weak area away from the cover plate 220, and when the weak area is impacted by gas pressure and bent to deform, the fixing hole can play a certain role in protecting the fixed connection between the first side plate 222 and the side cover plate 210, and reduce the impact influence of the gas pressure on the fixed connection area, so that the cover plate 220 can be better blocked to be away from the side cover plate 210, and the cover plate 220 is prevented from being flushed out.

Optionally, as shown in fig. 2 and 4, the side sealing plate 210 is provided with a plurality of heat dissipation holes 211.

Here, since the side sealing plate 210 is disposed along the circumferential direction of the pressure relief opening 111 of the top plate 110, and the plurality of heat dissipation holes 211 are formed in the side sealing plate 210, a heat dissipation channel can be formed, and ventilation and heat dissipation can be achieved inside the cabinet 100.

For example, in daily production projects, the horizontal main busbar is mainly responsible for current distribution between the power distribution cabinet and other electrical cabinets and/or main switches, and for transmitting main current; the heat dissipation space of the position where the horizontal main busbar is located is narrow, so that the heat dissipation performance is poor, the top plate 110 cannot meet the technical requirements of a high IP protection level, if the high protection level needs to be met, the top plate 110 cannot reserve heat dissipation holes generally, so that the heat dissipation cannot be achieved, the temperature rise speed of the horizontal main busbar is high, the temperature is high, the heat dissipation cannot be achieved easily, and the current carrying of the horizontal main busbar is reduced seriously.

Through set up a plurality of louvres 211 on side seal board 210, can be to the heat dissipation of the main arranging (not shown in the figure) of level that lies in cabinet body 100 roof 110 below for the main arranging of level can be in a thermally stable operational environment, reduces the temperature rise and falls the influence that holds to the main arranging of level, thereby can improve the main female work efficiency who arranges of level, makes the main arranging of level keep a relatively higher current-carrying capacity.

It should be understood that, the side sealing plate 210 is provided with a plurality of heat dissipation holes 211, and other components in the cabinet 100 can also be cooled. Such as vertical busbars, fuses, capacitors, etc.

Optionally, a fan (not shown in the figure) is fixedly installed on the inner side wall of the cover plate body 221, so that exchange between air in the cabinet 100 and external environment air can be accelerated.

Specifically, outside the heat accessible side seal board 210 louvre 211 all around that produces in the switch board gived off the cabinet body 110, when the cabinet body 110 need increase the heat dissipation air volume, can install the fan on the inside wall of apron body 210 additional and go out convulsions, through the high-speed operation of fan can accelerate the exchange of the interior gas of cabinet body 110 and outside gas, promoted the radiating effect of switch board greatly, also strengthened switch board overall safety nature.

Further, in order to improve the heat dissipation effect, the side sealing plate 210 may be made of a thin metal plate. The metal may be aluminum, aluminum alloy, copper alloy, stainless steel, or the like.

In addition, the side sealing plate 210 may also be a heat sink made of other materials with good thermal conductivity, which is not limited in this application.

It should be understood that when an internal arcing fault occurs in the power distribution cabinet, the generated gas pressure is not so large as to be insufficient to flush the cover plate 220, and the gas pressure generated by arcing can be directly released to the external environment through the heat dissipation holes 211.

Optionally, as shown in fig. 4, a dust-proof filter screen 212 is circumferentially disposed on the inner side of the side sealing plate 210, and the dust-proof filter screen 212 can be used to prevent dust, wind, sand and the like in the external environment from entering the cabinet 100.

Optionally, the dustproof filter screen 212 of the present application may be a planar mesh plate or a corrugated mesh plate, and the present application does not limit this.

Alternatively, as shown in fig. 2 and 4, a third side plate 215 is formed on the lower edge of the side sealing plate 210, and the side sealing plate 210 is fixedly connected to the top plate 110 through the third side plate 215.

In order to facilitate the fixing of the side sealing plates 210, the lower edges of the side sealing plates 210 are bent outwards to form third side plates 215 for fixedly connecting the side sealing plates 210 with the top plate 110, and the side sealing plates 210 and the top plate 110 are fixed simply and conveniently through the third side plates 215, thereby saving time.

In other embodiments, the lower edge of the side sealing plate 210 may not be provided with the third side plate 215, and the side sealing plate 210 may be directly welded to the top plate 110, or the side sealing plate 210 may be fixed to the top plate 110 by other fixing structures, which is not limited in this application.

Alternatively, the pressure relief structure 200 is made by an integral molding process. The integral molding process may be casting molding or other types, and the application is not limited thereto.

It should be understood that the overall dimension and the structural style of the pressure relief structure 200 can be adapted and combined according to the model of the power distribution cabinet, so that the requirements of the power distribution cabinets with different levels and shapes can be met, the universality and the interchangeability of the pressure relief structure are improved, the maintenance is convenient, the production cost is saved, and the pressure relief structure has strong practicability.

Optionally, a sealing ring (not shown) may be disposed between the cover plate 220 and the side sealing plate 210.

Specifically, a sealing ring is disposed between the bottom of the side plate formed downward of the cover plate 220 and the transverse portion 213 of the side sealing plate 210, so that the cover plate 220 and the side sealing plate 210 can be tightly connected, and functions of water proofing, dust proofing, and the like can be achieved.

Here, the seal ring may be made of sealing silicone, sealing silicone grease, or other sealing material, and the present application is not limited thereto.

In addition, the sealing ring may be replaced by a sealing gasket or other types of sealing members, and the application is not limited thereto.

It should be understood that the above description is only for the purpose of helping those skilled in the art better understand the embodiments of the present application, and is not intended to limit the scope of the embodiments of the present application. Various equivalent modifications or changes, or combinations of any two or more of the above, may be apparent to those skilled in the art in light of the above examples given. Such modifications, variations, or combinations are also within the scope of the embodiments of the present application.

It should also be understood that the foregoing descriptions of the embodiments of the present application focus on highlighting differences between the various embodiments, and that the same or similar elements that are not mentioned may be referred to one another and, for brevity, are not repeated herein.

It should also be understood that the manner, the case, the category, and the division of the embodiments are only for convenience of description and should not be construed as a particular limitation, and features in various manners, the category, the case, and the embodiments may be combined without contradiction.

It is also to be understood that the terminology and/or the description of the various embodiments herein is consistent and mutually inconsistent if no specific statement or logic conflicts exists, and that the technical features of the various embodiments may be combined to form new embodiments based on their inherent logical relationships.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (10)

1. A low-voltage power distribution cabinet is characterized by comprising a cabinet body (100) and a pressure relief structure (200) arranged at the top of the cabinet body (100),

the cabinet body (100) comprises a top plate (110), a pressure relief opening (111) is formed in the top plate (110), a side sealing plate (210) is arranged on the top plate (110) along the circumferential direction of the pressure relief opening (111),

the pressure relief structure (200) comprises a cover plate (220) and the side sealing plates (210), the cover plate (220) comprises a cover plate body (221) and a first side plate (222) and a second side plate (223) which are positioned at two opposite sides of the cover plate body (221),

the first side plate (222) is fixedly connected to the side sealing plate (210), the second side plate (223) is provided with a plurality of U-shaped grooves (224), the side sealing plate (210) is provided with through holes (227) at positions corresponding to the U-shaped grooves (224), bolts penetrate through openings of the U-shaped grooves (224) and are installed in the through holes (227), and then the second side plate (223) is connected to the side sealing plate (210);

when the power distribution cabinet has arcing faults, the generated gas pressure can prop the cover plate (220) open from one side of the second side plate (223), and then the gas pressure is released to the external environment.

2. The switch board of claim 1, characterized in that the first side plate (222) is provided with a plurality of strip-shaped holes (225) along the length direction to form a weak area, and when the switch board has an arcing fault, the cover plate (220) is bent outwards along the axial direction of the weak area and is pushed open.

3. The power distribution cabinet according to claim 2, wherein the first side plate (222) further has a plurality of fixing holes (226), the fixing holes (226) are located on a side of the weak area away from the cover plate (220), and the fixing holes (226) are used for fixedly connecting the first side plate (222) to the side sealing plate (210).

4. The switch board of any one of claims 1-3, wherein the side sealing plate (210) has a plurality of heat dissipation holes (211).

5. The power distribution cabinet according to claim 4, characterized in that the inner side of the side sealing plate (210) is circumferentially provided with a dustproof filter screen (212).

6. The power distribution cabinet according to claim 4, wherein a fan is fixedly installed on an inner side wall of the cover plate body (221) to accelerate the exchange between the gas in the cabinet body (100) and the external environment gas.

7. The power distribution cabinet according to claim 5, wherein the upper edge of the side sealing plate (210) is bent outwards to form a bent portion, the bent portion comprises a transverse portion (213) and a longitudinal portion (214), and the first side plate (222) and the second side plate (223) are respectively connected to the outer side wall of the longitudinal portion (214).

8. The power distribution cabinet according to claim 7, wherein the lower edge of the side sealing plate (210) is outwardly formed into a third side plate (215), and the side sealing plate (210) is fixedly connected with the top plate (110) through the third side plate (215).

9. A switch board according to any one of claims 1-3, characterized in that the pressure relief structure (200) is made by an integral molding process.

10. A switch board according to any one of claims 1-3, characterized in that a sealing ring is arranged between the cover plate (220) and the side sealing plate (210).

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