An explosion-proof electrical control cabinet

Abstract

This utility model relates to the field of electrical control cabinet technology and discloses an electrical control cabinet with explosion-proof function, including a housing, a cabinet door rotatably connected inside the housing, a strap fixedly connected to one side of the cabinet door, and a connecting assembly provided on the outer wall of the housing; the connecting assembly includes a fixing block, one side of the fixing block is fixedly connected to the outer wall of the housing, the strap is slidably connected inside the fixing block, a locking groove is formed inside the strap, a limit plate is slidably connected inside the fixing block, a locking block is fixedly connected to one side of the limit plate, the locking block engages with the locking groove, and a limit assembly is provided inside the fixing block. In this utility model, the strap on one side of the cabinet door is inserted into the fixing block on the outer wall of the housing, and then the locking block inside the fixing block engages with the locking groove to lock, thereby improving the connection strength of the electrical control cabinet door, solving the problem that the electrical control cabinet door is prone to bursting open under explosive impact, and improving the strength of the electrical control cabinet.

Description

Technical Field

[0001] This utility model relates to the field of electrical control cabinet technology, and in particular to an electrical control cabinet with explosion-proof function. Background Technology

[0002] Electrical control cabinets, serving as enclosures for and protecting electrical control equipment and components such as circuit breakers, contactors, PLCs, and frequency converters, are an indispensable core component of industrial automation and power distribution systems. In specialized industries such as chemical, petroleum, mining, and military, the production environment contains explosive gases or dust. Furthermore, the high-voltage components inside the control cabinets pose a potential risk of arc explosions due to short circuits, overloads, or other faults. Therefore, designing a special type of electrical control cabinet capable of effectively resisting internal and external explosive impacts and ensuring equipment integrity and personnel safety is of paramount importance for preventing major safety accidents and ensuring production continuity.

[0003] In typical industrial applications, the mechanical structure of a standard electrical control cabinet mainly consists of a cabinet frame and a door connected by hinges. The locking mechanism of the door typically uses standardized industrial door locks, most commonly a rotary handle type. The technical principle is quite straightforward: the operator turns the handle on the door, which drives a linkage, causing the latch (usually a flat steel plate or cam) at the end of the linkage to rotate approximately 90 degrees. In the closed state, this latch engages with the inner edge of the cabinet frame, thus locking the door. The primary purpose of this design is to facilitate routine opening and closing operations and prevent unauthorized personnel from accessing internal electrical components, while also providing a degree of dust and splash protection through the sealing strips along the door edge.

[0004] However, this traditional locking structure, primarily designed for theft and dust prevention, has very limited connection strength and is completely unable to withstand the enormous impact of an explosion. When an arcing fault occurs inside the electrical control cabinet or an explosion occurs in the external environment, the enormous instantaneous pressure will act evenly over a large area of ​​the cabinet door. This powerful impact force will be concentrated on one or a few thin latch contact points. Due to the limited stress points and the insufficient structural strength of the latch itself, it is extremely easy for the latch to deform, break, or slip off the cabinet frame, resulting in the cabinet door being blown open instantly. The failure of the cabinet door will not only allow flames, high-temperature gases, and equipment fragments from the explosion to be ejected directly, causing fatal injuries to personnel on site, but it will also paralyze the entire control system, triggering a chain reaction of more serious safety accidents. Therefore, its insufficient connection strength and susceptibility to blow-opening under explosive impact is a safety hazard that urgently needs to be addressed. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides an electrical control cabinet with explosion-proof function, which aims to improve the problem that the door of the electrical control cabinet is easy to blow open when subjected to an explosive impact.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an explosion-proof electrical control cabinet, including a housing, a cabinet door rotatably connected inside the housing, a strap fixedly connected to one side of the cabinet door, and a connecting component provided on the outer wall of the housing;

[0007] The connecting component includes a fixing block, one side of which is fixedly connected to the outer wall of the housing. The strap is slidably connected inside the fixing block, and a locking groove is provided inside the strap. A limiting plate is slidably connected inside the fixing block, and a locking block is fixedly connected to one side of the limiting plate. The locking block is engaged with the locking groove, and a limiting component is provided inside the fixing block.

[0008] As a further description of the above technical solution:

[0009] The limiting assembly includes a telescopic rod, the outer wall of which is fitted with a first spring. One end of the telescopic rod and the first spring are both fixedly connected to the other side of the limiting plate, and the other end of the telescopic rod and the first spring are both fixedly connected inside the fixing block.

[0010] As a further description of the above technical solution:

[0011] An installation rod is fixedly connected inside the housing, and an installation hole is provided inside the installation rod.

[0012] As a further description of the above technical solution:

[0013] A crossbar is slidably connected to the outer wall of the mounting rod, and a mounting plate is fixedly connected inside the crossbar.

[0014] As a further description of the above technical solution:

[0015] A hand-tightening bolt is inserted inside the crossbar, and the hand-tightening bolt is threaded into the mounting hole.

[0016] As a further description of the above technical solution:

[0017] A fixing rod is fixedly connected inside the housing. The fixing rod has a positioning hole inside and a fixing plate is provided on one side of the fixing rod.

[0018] As a further description of the above technical solution:

[0019] A locking block is fixedly connected to the outer wall of the fixing rod, and a buckle is fixedly connected to the outer wall of the fixing plate, with the buckle engaging with the locking block.

[0020] As a further description of the above technical solution:

[0021] A second spring is fixedly connected to one side of the fixing plate, and a clamping plate is fixedly connected to one end of the second spring. The clamping plate is fitted into the positioning hole.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, firstly, the strap on one side of the cabinet door is inserted into the fixing block on the outer wall of the housing. Then, the locking block inside the fixing block engages with the locking groove to lock, thereby improving the connection strength of the electrical control cabinet door and solving the problem that the electrical control cabinet door is prone to bursting open when subjected to an explosive impact, thus improving the strength of the electrical control cabinet.

[0024] 2. In this utility model, the cable is embedded inside the positioning hole, and the fixing plate is connected to the fixing rod by snap fasteners and clips. The clamp on one side of the fixing plate is supported by the tension of the second spring so that the clamp is embedded in the positioning hole to fix the cable, which achieves the effect of easy cable management. This solves the problem of inconvenient cable management when installing components in the electrical control cabinet and improves the practicality of the electrical control cabinet. Attached Figure Description

[0025] Figure 1 This is a perspective view of an explosion-proof electrical control cabinet proposed in this utility model.

[0026] Figure 2 This is a schematic diagram of the strap structure of an explosion-proof electrical control cabinet proposed in this utility model.

[0027] Figure 3 This is a schematic diagram of the internal structure of the fixing block of an explosion-proof electrical control cabinet proposed in this utility model.

[0028] Figure 4 This is a schematic diagram of the internal structure of an explosion-proof electrical control cabinet according to the present invention.

[0029] Figure 5 This is a schematic diagram of the mounting plate structure of an explosion-proof electrical control cabinet proposed in this utility model;

[0030] Figure 6 for Figure 5 A magnified view of a portion of point A in the middle.

[0031] Legend:

[0032] 1. Housing; 2. Fixing block; 3. Strap; 4. Locking groove; 5. Limiting plate; 6. Locking block; 7. Telescopic rod; 8. First spring; 9. Mounting rod; 10. Crossbar; 11. Mounting hole; 12. Mounting plate; 13. Hand-tightening bolt; 14. Fixing rod; 15. Positioning hole; 16. Clamping block; 17. Fixing plate; 18. Buckle; 19. Second spring; 20. Clamping plate; 21. Cabinet door. Detailed Implementation

[0033] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] Reference Figures 1-3 This utility model provides an embodiment of an explosion-proof electrical control cabinet, comprising a housing 1, which serves as the main structure of the electrical control cabinet, providing storage space and basic protection for internal components. A cabinet door 21 is rotatably connected inside the housing 1, its function being to open and close the door via a hinge structure. A strap 3 is fixedly connected to one side of the cabinet door 21, serving as a locking component extending from the door and used to insert into a connecting assembly on the housing. A connecting assembly is provided on the outer wall of the housing 1; this assembly is the core mechanism for achieving high-strength locking between the cabinet door and the housing.

[0035] The connecting assembly includes a fixing block 2, which acts as a lock seat mounted on the housing to receive and lock the strap 3. One side of the fixing block 2 is fixedly connected to the outer wall of the housing 1, securing the lock seat firmly to the cabinet structure. The strap 3 is slidably connected inside the fixing block 2, indicating that the strap inserts into the lock seat when the cabinet door is closed. A locking groove 4 is provided inside the strap 3, serving as a locking engagement point for the locking block to engage. A limit plate 5 is slidably connected inside the fixing block 2, acting as a movable plate to support the movement of the locking block. A locking block 6 is fixedly connected to one side of the limit plate 5, acting as a locking pin that directly engages with the locking groove on the strap to achieve locking. The locking block 6 engages with the locking groove 4, and through the cooperation of the pin and the groove, firmly fixes the strap inside the fixing block. To prevent the cabinet door from being pulled open by external force, a limiting component is provided inside the fixing block 2. This component guides the movement of the locking mechanism and provides it with a restoring force. The limiting component includes a telescopic rod 7, which acts as a guide rod to ensure that the limiting plate 5 can move smoothly in a linear reciprocating motion. A first spring 8 is sleeved on the outer wall of the telescopic rod 7, which provides elasticity so that the locking block has a tendency to automatically engage. One end of the telescopic rod 7 and the first spring 8 are both fixedly connected to the other side of the limiting plate 5. Their function is to connect the movable ends of the spring and the telescopic rod to the limiting plate that carries the locking block. The other ends of the telescopic rod 7 and the first spring 8 are both fixedly connected inside the fixing block 2. Their function is to provide a fixed support point for the spring and the telescopic rod so that they can continuously push the limiting plate 5, thereby keeping the locking block 6 automatically and normally in the locking position engaged with the locking groove 4.

[0036] Reference Figure 4 and Figure 6 The housing 1 has a mounting rod 9 fixedly connected inside, which provides a sturdy base rail for installing other equipment inside the cabinet. The mounting rod 9 has mounting holes 11 inside, providing threaded connection points for hand-tightening bolts to lock the position. A crossbar 10 is slidably connected to the outer wall of the mounting rod 9, serving as a horizontal support beam that can move horizontally on the mounting rod. A mounting plate 12 is fixedly connected inside the crossbar 10, providing a flat mounting surface for fixing various electrical components. A hand-tightening bolt 13 passes through the crossbar 10, acting as the locking mechanism. The hand-tightening bolt 13 is threaded into the mounting hole 11, and tightening the bolt securely fixes the crossbar 10 to any desired position on the mounting rod 9. A fixing rod 14 is fixedly connected inside the housing 1, serving as a fixed base for the cable management device. The fixing rod 14 has positioning holes 15 inside, used for accommodating and fixing cables. The cable clamping mechanism has a channel through which cables can pass. A fixing plate 17 is provided on one side of the fixing rod 14, which serves as a detachable clamping plate and works in conjunction with the fixing rod. A locking block 16 is fixedly connected to the outer wall of the fixing rod 14, which serves as a fixed locking point for the quick installation mechanism. A buckle 18 is fixedly connected to the outer wall of the fixing plate 17, which serves as a movable locking component for the quick installation mechanism. The buckle 18 engages with the locking block 16, and its function is to enable quick installation and removal of the fixing plate 17 on the fixing rod 14 through the elastic deformation of the buckle. A second spring 19 is fixedly connected to one side of the fixing plate 17, which provides continuous elastic force for the cable clamping mechanism. A clamping plate 20 is fixedly connected to one end of the second spring 19, which serves as a clamping component and clamps the cable under the action of the spring force. The clamping plate 20 engages with the positioning hole 15, and its function is to use the tension of the spring to press the edge of the clamping plate 20 into the positioning hole 15, thereby firmly clamping the cable passing through the hole and preventing it from loosening.

[0037] Working principle: When using the explosion-proof electrical control cabinet, firstly, to improve the connection strength between the housing 1 and the cabinet door 21, the strap 3 on one side of the cabinet door 21 is inserted into the fixing block 2 on the outer wall of the housing 1. Then, the locking block 6 inside the fixing block 2 engages with the locking groove 4 to lock. The locking block 6 is slidably limited in the fixing block 2 by the limiting plate 5 and supported by the tension of the first spring 8, so that the locking block 6 can be stably engaged in the locking groove 4 to lock, thereby improving the connection strength of the electrical control cabinet door 21.

[0038] When installing components, first adjust the position of the crossbar 10 on the mounting rod 9. After it is in place, tighten the hand-tightened bolt 13 through the crossbar 10 and screw it into the mounting hole 11 for fixation. Then, install the component on the mounting plate 12 for fixation. When limiting the cable, the cable is embedded in the positioning hole 15. Then, the fixing plate 17 is connected to the fixing rod 14 by the buckle 18 and the locking block 16. The clamp 20 on one side of the fixing plate 17 is supported by the tension of the second spring 19, so that the clamp 20 is embedded in the positioning hole 15 to fix the cable, which achieves the effect of easy cable management.

[0039] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An explosion-proof electrical control cabinet, comprising a housing (1), characterized in that: The housing (1) is rotatably connected to a cabinet door (21), and a strap (3) is fixedly connected to one side of the cabinet door (21). A connecting component is provided on the outer wall of the housing (1). The connecting assembly includes a fixing block (2), one side of which is fixedly connected to the outer wall of the housing (1). The strap (3) is slidably connected inside the fixing block (2). A locking groove (4) is provided inside the strap (3). A limiting plate (5) is slidably connected inside the fixing block (2). A locking block (6) is fixedly connected to one side of the limiting plate (5). The locking block (6) is engaged with the locking groove (4). A limiting component is provided inside the fixing block (2).

2. The electrical control cabinet with explosion-proof function according to claim 1, characterized in that: The limiting component includes a telescopic rod (7), and a first spring (8) is sleeved on the outer wall of the telescopic rod (7). One end of the telescopic rod (7) and the first spring (8) are both fixedly connected to the other side of the limiting plate (5), and the other end of the telescopic rod (7) and the first spring (8) are both fixedly connected to the inside of the fixing block (2).

3. The electrical control cabinet with explosion-proof function according to claim 1, characterized in that: An installation rod (9) is fixedly connected inside the housing (1), and an installation hole (11) is provided inside the installation rod (9).

4. An explosion-proof electrical control cabinet according to claim 3, characterized in that: The mounting rod (9) is slidably connected to a crossbar (10) on its outer wall, and a mounting plate (12) is fixedly connected inside the crossbar (10).

5. An explosion-proof electrical control cabinet according to claim 4, characterized in that: A hand-tightening bolt (13) is inserted inside the crossbar (10), and the hand-tightening bolt (13) is threaded into the mounting hole (11).

6. An explosion-proof electrical control cabinet according to claim 1, characterized in that: A fixing rod (14) is fixedly connected inside the housing (1). A positioning hole (15) is opened inside the fixing rod (14). A fixing plate (17) is provided on one side of the fixing rod (14).

7. An explosion-proof electrical control cabinet according to claim 6, characterized in that: The outer wall of the fixing rod (14) is fixedly connected to a locking block (16), and the outer wall of the fixing plate (17) is fixedly connected to a buckle (18), which engages with the locking block (16).

8. An explosion-proof electrical control cabinet according to claim 6, characterized in that: A second spring (19) is fixedly connected to one side of the fixing plate (17), and a clamping plate (20) is fixedly connected to one end of the second spring (19). The clamping plate (20) is fitted into the positioning hole (15).

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