An explosion-proof electric control box

Abstract

This utility model belongs to the field of electrical control box technology, specifically an explosion-proof electrical control box, including a box body, a cover plate, a first fixed plate, a second fixed plate, and an explosion-proof PLC touch screen. A sealing element is provided between the first fixed plate and the second fixed plate, which is divided into multiple sealing components by a partition. The partition includes a first inclined part, a second inclined part, and a third inclined part. The inlets of the first and third inclined parts are lower than the outlets, and the inclination of the third inclined part is steeper. The length of the first inclined part is shorter than that of the third inclined part. The first fixed plate has a positioning groove, and the sealing element has a positioning post that cooperates with the positioning groove. An explosion-proof air conditioner is provided on one side of the box body, and a base is provided at the bottom. This utility model reduces processing and manufacturing costs through the segmented sealing component design, prevents poor sealing caused by deformation of the sealing element during installation, stabilizes the stress on the sealing element, avoids stress concentration, and reduces the risk of sealing failure.

Description

Technical Field

[0001] This utility model belongs to the field of electrical control box technology, specifically an explosion-proof electrical control box. Background Technology

[0002] Explosion-proof electrical control boxes are electrical equipment protection devices specifically designed for hazardous environments to ensure the safe operation of industrial control systems. They are widely used in high-risk fields such as petrochemicals, coal mines, and metallurgy.

[0003] Existing explosion-proof electrical control boxes are mainly composed of the following parts: box body, cover plate, seals, fixing plate, bolts, internal electrical components, etc. Among them, the seals are planar structures that are directly filled into the joint surface between the box body and the cover plate. The overall seals are prone to stress concentration due to the deformation of the box body.

[0004] Current explosion-proof electrical control boxes have the following drawbacks: Due to their large overall structure, the integral sealing ring is also large, resulting in high mold processing and procurement costs. Furthermore, during installation, the integral sealing ring undergoes significant sagging deformation due to its own weight. During cover plate assembly and pressing, uneven deformation in different parts leads to uneven sealing gaps, affecting sealing performance. Additionally, uneven stress on the integral sealing ring during bolt tightening causes a significant decrease in sealing performance, failing to meet the long-term reliable protection requirements of high-risk environments. Therefore, this paper proposes an explosion-proof electrical control box to address these issues. Utility Model Content

[0005] To address the shortcomings of existing explosion-proof electrical control boxes and solve the problem of poor sealing performance, a new explosion-proof electrical control box is proposed.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: The explosion-proof electrical control box of this utility model includes a box body for assembling electrical equipment and a cover plate set at the opening end of the box body. The box body and the cover plate are respectively provided with a first fixing plate and a second fixing plate for docking and fixing the two together. The first fixing plate and the second fixing plate are fixed by bolts. The cover plate is provided with a PLC explosion-proof touch screen. A sealing element is provided between the first fixing plate and the second fixing plate. The sealing element is divided into multiple sealing components by a partition. The partition includes a first inclined part near the outside of the box body, a second inclined part, and a third inclined part near the inside of the box body. The inlets of the first inclined part and the third inclined part are both lower than their outlets, and the inclination of the third inclined part is steeper than that of the first inclined part.

[0007] Preferably, the length of the first inclined portion is shorter than that of the third inclined portion.

[0008] Preferably, the first fixing plate has a positioning groove for positioning and fixing the sealing element, and the sealing element has a positioning post that cooperates with the positioning groove.

[0009] Preferably, an explosion-proof air conditioner is provided on one side of the enclosure for cooling the internal electrical components.

[0010] Preferably, the bottom of the box is provided with a base to allow the box to be installed at a certain height.

[0011] The beneficial effects of this utility model are:

[0012] This utility model provides an explosion-proof electrical control box with a segmented sealing component design. Firstly, it reduces the mold processing cost for manufacturers and the procurement cost of sealing components. Secondly, each sealing component independently bears the weight and assembly pressure, avoiding the sagging deformation of the overall sealing ring due to its own weight and preventing uneven sealing caused by installation deformation. At the same time, the segmented structure of the sealing component disperses the concentrated stress generated by bolt tightening, preventing uneven stress from causing a decrease in sealing performance. Attached Figure Description

[0013] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0014] Figure 1 This is a side view of the overall structure of this utility model;

[0015] Figure 2 This is a structural diagram of the housing, the first fixing plate, and the sealing element of this utility model;

[0016] Figure 3 yes Figure 2 Enlarged view of the structure at point A in the middle;

[0017] Figure 4 This is a structural diagram of the housing, the first fixing plate, and the positioning groove of this utility model;

[0018] Figure 5 This is a side sectional view of the first fixing plate, the second fixing plate, and the sealing element of this utility model;

[0019] Figure 6 This is a front view of the overall structure of this utility model;

[0020] Legend:

[0021] 1. Housing; 2. Cover plate; 3. First fixing plate; 4. Second fixing plate; 5. PLC explosion-proof touch screen; 6. Sealing element; 7. Partition; 701. First inclined part; 702. Second inclined part; 703. Third inclined part; 8. Sealing assembly; 9. Positioning groove; 10. Positioning column; 11. Explosion-proof air conditioner; 12. Base; 01. Inlet; 02. Outlet. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0023] Specific implementation examples are given below.

[0024] Please see Figures 1-6The present invention discloses an explosion-proof electrical control box, comprising a box body 1 for assembling electrical equipment and a cover plate 2 disposed at the opening end of the box body 1. The box body 1 and the cover plate 2 are respectively provided with a first fixing plate 3 and a second fixing plate 4 for fixing them together. The first fixing plate 3 and the second fixing plate 4 are fixed by bolts. An explosion-proof air conditioner 11 for cooling the internal electrical components is disposed on one side of the box body 1. A base 12 for mounting the box body 1 to a certain height is disposed at the bottom end of the box body 1. A PLC explosion-proof touch screen 5 is disposed on the cover plate 2. A sealing element 6 is disposed between the first fixing plate 3 and the second fixing plate 4. The sealing element 6 is divided into multiple sealing components 8 by a partition 7. The first fixing plate 3 has a positioning groove 9 for positioning and fixing the sealing element 6. The sealing element 6 is provided with a positioning post 10 that cooperates with the positioning groove 9. The partition 7 includes a first inclined portion 701 near the outside of the box body 1, a second inclined portion 702, and a portion near the outside of the box body 1. The third inclined portion 703 on the inner side of the body 1 has an inlet 01 lower than the outlet 02 of both the first inclined portion 701 and the third inclined portion 703. The inclination of the third inclined portion 703 is steeper than that of the first inclined portion 701. The length of the first inclined portion 701 is shorter than that of the third inclined portion 703. During operation, when installing the cover plate 2 and the housing 1, the positioning post 10 on the seal 6 is first inserted into the positioning groove 9 on the first fixing plate 3 to initially limit the seal 6 and facilitate the installation of the seal 6. The seal 6 is made of rubber, but not limited to rubber. Then, the bolts are passed through the holes on the first fixing plate 3 and the second fixing plate 4 to fasten the cover plate 2. The applied pressure will compress and deform the seal 6 to enhance the sealing effect. At the same time, since the seal 6 is divided into multiple sealing components 8 by the partition 7, the installation stress can be distributed. Each sealing component 8 independently adapts to the deformation of the mating surface, improving the sealing reliability and simplifying the mold processing, reducing the manufacturing cost. The spacing of the partition 7 is 0.1mm, when multiple sealing components 8 are fixed in the cover plate 2, they are deformed under pressure, causing the ends of two adjacent sealing components 8 to deform closer and fit together, improving the sealing performance. Due to the structural design of the partition 7, even if external impurities invade from the outside of the box 1, they will first enter from the inlet 01 outside the first inclined part 701 and then climb up the slope. Due to the resistance generated by gravity, the speed will be significantly reduced, forming a primary filtration barrier. If the impurities enter the second inclined part 702, as an intermediate transition section, the intrusion path will change abruptly with a larger bend angle, further blocking the impurities. Upon entering the third inclined section 703, due to its steeper slope design (inlet 01 is lower than outlet 02), and with a greater slope and length than the first inclined section 701, it needs to overcome greater gravitational resistance. The long path and steep slope deplete its kinetic energy. The multi-stage inclined sections form a continuous zigzag channel. Through a "climbing-turning-climbing" path design, the resistance to the intrusion of impurities continuously accumulates, preventing damage to the electrical components inside the housing 1 and achieving a protective effect. Furthermore, the deformation of the sealing component 8 also causes deformation of the partition 7, making the structure of the partition 7 more complex and further enhancing its protective performance.

[0025] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. An explosion-proof electrical control box, comprising a box body (1) for assembling electrical equipment, and a cover plate (2) disposed at the opening end of the box body (1), wherein the box body (1) and the cover plate (2) are respectively provided with a first fixing plate (3) and a second fixing plate (4) for fixing the two together, the first fixing plate (3) and the second fixing plate (4) being fixed by bolts, and an explosion-proof PLC touch screen (5) is disposed on the cover plate (2), characterized in that: A sealing element (6) is provided between the first fixing plate (3) and the second fixing plate (4). The sealing element (6) is divided into multiple sealing components (8) by a partition (7). The partition (7) includes a first inclined portion (701) near the outside of the box (1), a second inclined portion (702), and a third inclined portion (703) near the inside of the box (1). The inlets (01) of the first inclined portion (701) and the third inclined portion (703) are both lower than their outlets (02), and the inclination of the third inclined portion (703) is steeper than that of the first inclined portion (701).

2. An explosion-proof electric control box according to claim 1, characterized in that: The length of the first inclined portion (701) is shorter than that of the third inclined portion (703).

3. An explosion-proof electric control box according to claim 1, characterized in that: The first fixing plate (3) is provided with a positioning groove (9) for positioning and fixing the sealing element (6), and the sealing element (6) is provided with a positioning post (10) that cooperates with the positioning groove (9).

4. The explosion-proof electrical control box according to claim 1, characterized in that: An explosion-proof air conditioner (11) for cooling the internal electrical components is provided on one side of the enclosure (1).

5. An explosion-proof electric control box according to claim 1, characterized in that: The bottom of the box (1) is provided with a base (12) for mounting the box (1) at a certain height.

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