CN219627223U

CN219627223U - Explosion-proof block terminal body and explosion-proof block terminal

Info

Publication number: CN219627223U
Application number: CN202320372862.1U
Authority: CN
Inventors: 唐树新; 向蓉; 易星星; 董海军
Original assignee: Beijing Huayuan Xinli Power Technology Co ltd
Current assignee: Beijing Huayuan Xinli Power Technology Co ltd
Priority date: 2023-03-03
Filing date: 2023-03-03
Publication date: 2023-09-01
Anticipated expiration: 2033-03-03

Abstract

The utility model belongs to the technical field of power equipment, and discloses an explosion-proof distribution box body and an explosion-proof distribution box, wherein the explosion-proof distribution box body comprises an upper shell and a lower shell, an explosion-proof surface I is arranged at the outer edge of the open end of the upper shell, an explosion-proof surface II is arranged at the outer edge of the open end of the lower shell, the upper shell is fixed on the lower shell through screws, the explosion-proof surface I and the explosion-proof surface II are tightly attached, the explosion-proof surface I is provided with an explosion-proof convex wall, an explosion-proof groove corresponding to the explosion-proof convex wall is arranged on the explosion-proof surface II, and the explosion-proof convex wall is inserted in the explosion-proof groove. According to the explosion-proof power distribution box provided by the utility model, the explosion-proof convex wall and the explosion-proof groove which are perpendicular to the explosion-proof surface are added on the explosion-proof surface attached to the upper shell and the lower shell, so that the buffer distance and the buffer time for overflowing high-temperature gas generated by explosion in the power distribution box are increased, the explosion-proof power distribution box can be furthest reduced to a safe temperature when entering an external environment, and flammable gas or dust in the external environment is ensured not to be ignited, and the explosion-proof performance of the explosion-proof power distribution box is improved.

Description

Explosion-proof block terminal body and explosion-proof block terminal

Technical Field

The utility model belongs to the technical field of power equipment, and particularly relates to an explosion-proof power distribution box body and an explosion-proof power distribution box.

Background

The explosion-proof distribution box is a distribution box with explosion-proof performance and is mainly applied to flammable and explosive scenes with high combustible dust, gas and danger, such as petrochemical devices, chemical industry, coal, textile, printing and dyeing, winery and the like.

The explosion-proof main principle of the explosion-proof distribution box is that the inside of the distribution box is isolated from the flammable and explosive environment outside through the distribution box body, so that the ignition source is isolated to achieve the explosion-proof purpose; the explosion-proof distribution box body in the prior art has the advantages that the wide and thick explosion-proof surface is arranged at the butt joint part of the two parts of the shell, after the electric devices in the distribution box explode, the explosion-proof surface is wider, the surface is smooth and closely attached, and the internal high-temperature gas and electric spark can be buffered and cooled through the wide explosion-proof surface, so that the high-temperature gas can be reduced to the safe temperature when reaching the outside, and the explosion-proof effect can be achieved; however, the prior art has the following problems: the explosion-proof surface attached to the existing explosion-proof power distribution box body is a wider plane, the width of the plane is designed according to the temperature of electric sparks and high-temperature gas in order to achieve the explosion-proof purpose, the wider the plane is, the longer the buffering and cooling distance of the high-temperature gas is, the better the explosion-proof performance is, the total requirement is that the electric sparks and the high-temperature gas cannot ignite external inflammables, but the size of the internal fire or explosion accidents of the power distribution box is uncontrollable, and the temperature of the safety gas of the external environment is uncontrollable, so that the width of the explosion-proof surface of the existing power distribution box body can only meet the explosion-proof requirement of high standards as much as possible according to requirements, but the explosion-proof performance of the existing power distribution box body is improved only through the increase of the width of the explosion-proof surface or the explosion-proof requirement of various unknown complex working conditions and environments cannot be met.

Disclosure of Invention

Aiming at the problems existing in the prior art, the utility model provides an explosion-proof distribution box body, which comprises an upper shell and a lower shell, wherein an explosion-proof surface I is arranged at the outer edge of the open end of the upper shell, an explosion-proof surface II is arranged at the outer edge of the open end of the lower shell, and the upper shell is fixed on the lower shell through screws, so that the explosion-proof surface I and the explosion-proof surface II are tightly attached;

the explosion-proof device comprises a first explosion-proof surface and a second explosion-proof surface, wherein the first explosion-proof surface is provided with an explosion-proof convex wall, the second explosion-proof surface is provided with an explosion-proof groove corresponding to the explosion-proof convex wall, and the explosion-proof convex wall is inserted into the explosion-proof groove.

Further, the lower sections of the explosion-proof convex wall and the explosion-proof groove are inverted triangles.

Furthermore, the explosion-proof convex wall and the explosion-proof groove are in clearance fit, and the clearance value is between 0 and 0.025 mm.

Further, at least one explosion-proof convex wall and at least one explosion-proof groove are respectively arranged.

Further, the roughness of the surfaces of the first explosion-proof surface and the second explosion-proof surface is not more than 6.5um, and the roughness of the inner surface of the explosion-proof groove and the outer surface of the explosion-proof convex wall is not more than 6.5um.

Further, the upper shell is further provided with a switch hole, a switch shaft rod is inserted into the switch hole, and a seal is formed between the switch shaft rod and the switch hole.

Further, the upper shell is also provided with an instrument window, and explosion-proof glass is hermetically arranged on the instrument window.

Another object of the present utility model is to provide an explosion-proof power distribution box, which is provided with the explosion-proof power distribution box body.

By combining all the technical schemes, the utility model has the advantages and positive effects that:

according to the explosion-proof power distribution box body, the explosion-proof convex walls and the explosion-proof grooves which are perpendicular to the explosion-proof surfaces and are in one-to-one correspondence are additionally arranged on the explosion-proof surfaces attached to the upper and lower shells, firstly, an electric spark in the power distribution box is effectively blocked, the electric spark is prevented from being conducted to the external environment of the power distribution box, secondly, high-temperature gas generated by explosion in the power distribution box can only flow along the horizontal explosion-proof surfaces and then sequentially overflows through vertical gaps between the multi-layer explosion-proof convex walls and the explosion-proof grooves, the buffer distance and buffer time of the high-temperature gas overflow are greatly increased, the high-temperature gas generated by explosion in the power distribution box can be furthest reduced to the safe temperature when entering the external environment, and inflammable gas or dust in the external environment is prevented from being ignited, so that the explosion-proof performance of the explosion-proof power distribution box body is furthest improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments of the present utility model will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is an exploded view of an explosion-proof power distribution box provided by an embodiment of the present utility model;

fig. 2 is a perspective view of an explosion-proof power distribution box provided by an embodiment of the present utility model;

fig. 3 is a cross-sectional view of an explosion-proof distribution box provided by an embodiment of the present utility model;

FIG. 4 is an enlarged view of a portion of an explosion-proof electrical box provided by an embodiment of the present utility model;

in the figure: 1. an upper housing; 2. a lower housing; 3. the explosion-proof surface I; 4. the explosion-proof surface II; 5. explosion-proof convex walls; 6. explosion-proof grooves; 7. an instrument window; 8. a switch; 9. a switch hole; 10. a threading hole; 81. and a switching shaft.

Detailed Description

The present utility model will be described in further detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

As shown in fig. 1-4, the utility model provides an explosion-proof distribution box body, which comprises an upper shell 1 and a lower shell 2, wherein the upper shell 1 and the lower shell 2 are both made of steel plates, the outer edge of the open end of the upper shell 1 is provided with a horizontal and smooth explosion-proof surface I3, the outer edge of the open end of the lower shell 2 is provided with a horizontal and smooth explosion-proof surface II 4, the explosion-proof surface I3 is provided with an explosion-proof convex wall 5 perpendicular to the explosion-proof surface II, the explosion-proof surface II 4 is provided with an explosion-proof groove 6 corresponding to the explosion-proof convex wall 5, at least one explosion-proof convex wall 5 and at least one explosion-proof groove 6 are arranged, the upper shell 1 is fixed on the lower shell 2 through screws, the explosion-proof surface I3 and the explosion-proof surface II 4 are tightly attached, meanwhile, the explosion-proof convex wall 5 is inserted in the explosion-proof groove 6, the explosion-proof convex wall 5 and the explosion-proof groove 6 are in clearance fit, the clearance value is between 0-0.025mm, and the explosion-proof effect is better when the clearance value is smaller;

the front of the upper shell 1 is provided with a switch hole 9 and an instrument window 7, explosion-proof glass is hermetically arranged on the instrument window 7, a switch 8 can be arranged on the switch hole 9, a sealing groove is arranged on a switch shaft for enabling the switch 8 to pass through the switch hole 9 to form a seal, a high-temperature-resistant sealing ring is arranged in the sealing groove, and the outer wall of a switch shaft rod 81 and the switch hole 9 form a seal under the action of the sealing ring; the lower shell 2 is provided with a plurality of wire inlet holes for connecting electrical components inside the distribution box with the outside, after the cable passes through the wire through holes 10 and is installed, the wire through holes 10 are filled with fireproof filler, so that the inside and the outside of the distribution box are isolated, and high-temperature gas can only be buffered and cooled through the explosion-proof surface when the inside of the distribution box is exploded.

In the preferred embodiment, the upper sections of the explosion-proof convex wall 5 and the explosion-proof groove 6 are rectangular, and the lower sections are inverted triangle, so that convenience in assembling the explosion-proof convex wall 5 and the explosion-proof groove 6 is improved, and air flow buffering flow is facilitated.

In the preferred embodiment, the roughness of the surfaces of the first explosion-proof surface 3 and the second explosion-proof surface 4 is not more than 6.5um, and the roughness of the inner surface of the explosion-proof groove 6 and the outer surface of the explosion-proof convex wall 5 is not more than 6.5um.

When the inside of the distribution box fires or explodes, the electric spark can be blocked by the explosion-proof surface and the explosion-proof convex wall 5 and cannot be conducted to the flammable and explosive environment outside the distribution box, and the high-temperature gas inside the distribution box can only slowly overflow along the horizontal gap of the explosion-proof surface and through the vertical gap between the multi-layer explosion-proof convex wall 5 and the explosion-proof groove 6, so that the buffer distance and buffer time of the overflow of the high-temperature gas are greatly increased, the high-temperature gas generated by explosion inside the distribution box can be furthest reduced to the safe temperature when entering the external environment, and the flammable gas or dust of the external environment is prevented from being ignited, so that the explosion-proof performance of the explosion-proof distribution box is furthest improved, and the explosion-proof performance and the explosion-proof effect of the explosion-proof distribution box are far superior to those of the existing explosion-proof distribution box.

It should be noted that the terms "first," "second," and the like, as used in embodiments of the present utility model, are not intended to denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items; the terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect; all directional indications (such as up, down, left, right, front, back, upstream, downstream … …) are merely used to explain the relative positional relationship, movement, etc. between the components at a particular pose (as shown in the drawings) and if the particular pose changes, the directional indication changes accordingly.

Furthermore, although exemplary embodiments have been described in the present disclosure, the scope thereof includes any and all embodiments having equivalent elements, modifications, omissions, combinations (e.g., of the various embodiments across), adaptations or alterations as would be appreciated by those in the art. The elements in the claims are to be construed broadly based on the language employed in the claims and are not limited to examples described in the present specification or during the practice of the utility model, which examples are to be construed as non-exclusive. It is intended, therefore, that the specification and examples be considered as exemplary only, with a true scope and spirit being indicated by the following claims and their full scope of equivalents.

The foregoing is merely illustrative of specific embodiments of the present utility model, and the scope of the utility model is not limited thereto, but any modifications, equivalents, improvements and alternatives falling within the spirit and principles of the present utility model will be apparent to those skilled in the art within the scope of the present utility model.

Claims

1. The explosion-proof distribution box body is characterized by comprising an upper shell and a lower shell, wherein an explosion-proof surface I is arranged at the outer edge of the open end of the upper shell, an explosion-proof surface II is arranged at the outer edge of the open end of the lower shell, and the upper shell is fixed on the lower shell through screws and enables the explosion-proof surface I to be tightly attached to the explosion-proof surface II;

2. The explosion-proof power distribution box body according to claim 1, wherein the lower sections of the explosion-proof convex wall and the explosion-proof groove are inverted triangles.

3. The explosion-proof power distribution box body according to claim 1, wherein the explosion-proof convex wall and the explosion-proof groove are in clearance fit, and the clearance value is between 0 and 0.025 mm.

4. The explosion-proof power distribution box body according to claim 1, wherein at least one explosion-proof convex wall and one explosion-proof groove are arranged.

5. The explosion-proof power distribution box body according to claim 1, wherein the roughness of the first explosion-proof surface and the second explosion-proof surface is not more than 6.5um, and the roughness of the inner surface of the explosion-proof groove and the outer surface of the explosion-proof convex wall is not more than 6.5um.

6. The explosion-proof electrical box as set forth in claim 1, wherein said upper housing further defines a switch aperture and a switch shaft is inserted into the switch aperture, said switch shaft being sealed to the switch aperture.

7. The explosion-proof power distribution box as set forth in claim 1, wherein said upper housing is further provided with an instrument window, and an explosion-proof glass is installed in the instrument window in a sealed manner.

8. An explosion-proof power distribution box, characterized in that the explosion-proof power distribution box is provided with an explosion-proof power distribution box body as claimed in any one of claims 1 to 7.