An explosion-proof switch with an anti-loosening structure

Abstract

This utility model relates to the technical field of explosion-proof switches, and in particular to an explosion-proof switch with an anti-loosening structure. The switch includes a mounting block welded to its bottom, and a rotary key movably fitted around the outer ring of the mounting block. This lighting explosion-proof switch with an anti-loosening structure achieves rapid installation and reliable fixation through the coordinated structure of the mounting block, rotary key, and locking block. During installation, the rotary key presses down, pushing the locking block into the locking hole via a conical surface to form an interlock. Combined with a limiting structure, this ensures positioning accuracy and provides excellent anti-loosening performance, improving the reliability and safety of the switch under harsh operating conditions. Axial positioning is achieved through the threaded engagement of the stabilizing block and the rotary key. The locking block automatically resets under the action of a spring. The engagement of the limiting block and the limiting groove prevents installation misalignment. Multiple locking mechanisms ensure the switch does not loosen under vibration. The conical surface converts rotational motion into linear displacement. The installation process is simple and efficient, and disassembly is achieved simply by rotating in the opposite direction during maintenance.

Description

Technical Field

[0001] This utility model relates to the technical field of explosion-proof switches, and in particular to an explosion-proof switch with an anti-loosening structure. Background Technology

[0002] The anti-loosening structure of this utility model is used in explosion-proof lighting switches. Explosion-proof lighting switches are electrical control devices specifically designed for flammable and explosive environments. They are used to safely control the opening and closing of explosion-proof lamps or other lighting devices. Their core function is to prevent electric sparks, arcs, or high-temperature surfaces from igniting surrounding flammable gases, vapors, or dust, ensuring safe production. Therefore, stable installation is crucial. Hence, an explosion-proof switch with an anti-loosening structure is needed.

[0003] Existing explosion-proof switches are usually installed using bolts. This installation method is not stable enough and is prone to loosening over time. When repairing the switch, it is necessary to loosen each bolt one by one, which is a cumbersome and time-consuming process and affects the efficiency of emergency repairs. Utility Model Content

[0004] The purpose of this utility model is to provide an explosion-proof switch with an anti-loosening structure to solve the problem mentioned in the background art that the existing explosion-proof switches are usually fixed with bolts during installation. This installation method is not stable enough and is prone to loosening over time. When maintaining the switch, it is necessary to loosen the bolts one by one, which is cumbersome, time-consuming and affects the efficiency of emergency repairs.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an explosion-proof switch with an anti-loosening structure, comprising a switch, a mounting block welded to the bottom of the switch, a rotary key movably sleeved on the outer ring of the mounting block, a stabilizing block sleeved on the outer ring of the rotary key, a fixing ring welded inside the rotary key, a base fixedly installed at the bottom of the stabilizing block, an annular groove formed on the outer ring of the stabilizing block, and a locking block movably disposed on the upper surface of the base.

[0006] Preferably, the outer surface of the rotary key is provided with threads, the interior of the stabilizing block is provided with internal threads corresponding to the threads of the rotary key, and the lower part of the rotary key that contacts the locking block is a tapered surface.

[0007] Preferably, the bottom of the mounting block is provided with a limiting block, and the center of the upper surface of the base is precisely machined with a matching limiting groove, and the outline dimensions of the limiting groove correspond perfectly with the limiting block.

[0008] Preferably, a rectangular groove is provided on the upper surface of the base corresponding to the position of the card block. The depth of the groove is slightly greater than the thickness of the card block, so that the card block can move smoothly in the groove in the vertical direction. A high-strength spring is embedded in one side of the groove. One end of the spring is fixed to the side wall of the groove, and the other end is in close contact with the bottom of the card block.

[0009] Preferably, the mounting block and the card block have corresponding holes of matching size, and the upper end of the card block is precision machined to form a protruding structure that can be accurately fitted into the card hole.

[0010] Preferably, the retaining ring inside the rotary key corresponds to the annular groove on the outer ring of the mounting block.

[0011] Compared with existing technologies, the beneficial effects of this utility model are as follows: This explosion-proof lighting switch with an anti-loosening structure achieves rapid installation and reliable fixation of the switch through the coordinated arrangement of a mounting block, a rotary key, a stabilizing block, a base, a locking block, a limiting block, a limiting groove, a recess, a spring, a locking hole, a fixing ring, and an annular groove. During installation, the mounting block with the rotary key is first aligned vertically with the center of the stabilizing block and placed in place. When the rotary key begins to rotate and press down, its bottom conical surface makes progressive contact with the locking block. Through the mechanical conversion of the conical surface, the rotational downward pressure is converted into a linear pushing force, allowing the locking block to smoothly overcome the spring resistance and move towards the mounting block, ultimately accurately locking into the locking hole to form a structural interlock. At the same time, the cooperation between the limiting block and the limiting groove ensures the axial positioning accuracy of the installation. This multi-layered anti-loosening structure design not only enables rapid disassembly and assembly of the switch but also effectively resists vibration and impact, ensuring the long-term stable operation of the explosion-proof switch under harsh working conditions, greatly improving the reliability and safety of the equipment. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall appearance and structure of the present utility model;

[0013] Figure 2 This is a schematic diagram of the overall disassembled structure of this utility model;

[0014] Figure 3 This is a schematic cross-sectional view of the anti-loosening integral component of this utility model;

[0015] Figure 4 This is a schematic diagram showing the relationship between the position of the card block in the card hole and the position of the annular groove in this utility model.

[0016] Figure 5 This is a schematic diagram showing the structural relationship between the position of the locking block and the spring within the groove of this utility model.

[0017] In the diagram: 1. Switch; 2. Mounting block; 3. Rotary key; 4. Stabilizing block; 5. Base; 6. Locking block; 7. Limiting block; 8. Limiting groove; 9. Groove; 10. Spring; 11. Locking hole; 12. Fixing ring; 13. Annular groove. Detailed Implementation

[0018] 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.

[0019] Please see Figure 1-5 This utility model provides a technical solution: an explosion-proof switch with an anti-loosening structure, including a switch 1, a mounting block 2 welded to the bottom of the switch 1, a rotary key 3 movably sleeved on the outer ring of the mounting block 2, a stabilizing block 4 sleeved on the outer ring of the rotary key 3, a fixing ring 12 welded inside the rotary key 3, a base 5 fixedly installed at the bottom of the stabilizing block 4, an annular groove 13 opened on the outer ring of the stabilizing block 4, and a locking block 6 movably disposed on the upper surface of the base 5.

[0020] Furthermore, the outer surface of the rotary key 3 is provided with threads, and the interior of the stabilizing block 4 is provided with internal threads that correspond to the threads of the rotary key 3. The part of the rotary key 3 that contacts the locking block 6 is a tapered surface. Through the arrangement of the rotary key 3, the stabilizing block 4 and the locking block 6, the threaded structure can increase the contact surface to provide fastening force, and it is also more convenient to install or disassemble. The tapered surface design of the rotary key 3 and the locking block 6 can better convert the rotational motion of the rotary key 3 into linear motion and transmit it to the locking block 6.

[0021] Furthermore, a limiting block 7 is provided at the bottom of the mounting block 2, and a matching limiting groove 8 is precisely machined at the center of the upper surface of the base 5. The outline dimensions of the limiting groove 8 correspond perfectly to the limiting block 7. Through the cooperation of the mounting block 2, the limiting block 7, the base 5, and the limiting groove 8, the limiting block 7 is accurately guided into the limiting groove 8 in the vertical direction during the assembly process, forming a stable guiding and positioning structure. This design not only ensures the axial alignment accuracy of the mounting block 2 and the base 5, but also effectively prevents them from being misaligned or misplaced during assembly, thereby accurately positioning the positional relationship between the mounting block 2 and the base 5 and improving the assembly reliability and stability of the overall structure.

[0022] Furthermore, a rectangular groove 9 is provided on the upper surface of the base 5 corresponding to the position of the locking block 6. The depth of the groove 9 is slightly greater than the thickness of the locking block 6, allowing the locking block 6 to move smoothly in the groove 9 in the vertical direction. A high-strength spring 10 is embedded in one side of the groove 9. One end of the spring 10 is fixed to the side wall of the groove 9, and the other end is in close contact with the bottom of the locking block 6. Through the coordinated arrangement of the base 5, the locking block 6, and the spring 10, the locking block 6 can be kept in a stable locking state during daily use. When the switch 1 needs to be repaired, only an appropriate external force needs to be applied to overcome the preload of the spring 10. At this time, the spring 10 can quickly push the locking block 6 out of the locking hole 11 and automatically reset to the initial position. This elastic mechanism design not only realizes the quick release function of the locking block 6, but also avoids damage to the parts during disassembly, making the maintenance operation of the switch 1 more convenient and efficient.

[0023] Furthermore, mounting block 2 and locking block 6 have correspondingly sized locking holes 11. The upper end of locking block 6 is precision machined to form a protruding structure, which can be accurately fitted into the locking hole 11. With the setting of mounting block 2 and locking block 6, after the switch 1 is installed, the locking block 6 moves in the groove under pressure, and then the protruding part is completely embedded in the locking hole 11 to form a stable positioning structure. This design not only realizes the rapid positioning and installation of switch 1, but also effectively prevents the switch 1 from lateral displacement or loosening during use, thereby further stabilizing the installation firmness of switch 1.

[0024] Furthermore, the fixing ring 12 inside the rotary key 3 corresponds to the annular groove 13 on the outer ring of the mounting block 2. Through the arrangement of the rotary key 3, fixing ring 12, mounting block 2 and annular groove 13, when the fixing ring 12 inside the rotary key 3 lowers and locks the mounting block 2, the mounting block 2 may be unable to fall down in time due to height issues, causing the locking block 6 to move towards the mounting block 2 for locking while the mounting block 2 fails to fall down in time. This results in the locking block 6 not being able to engage with the locking hole 11 to complete the locking. The fixing ring 12 is in the annular groove 13 to ensure that the lower limit block 7 can touch the bottom in advance, preventing the locking block 6 from moving prematurely when the mounting block 2 is not in place, ensuring a smooth locking process. The early bottoming of the limit block 7 into the limit groove 8 provides support for the mounting block 2, allowing it to stay in the correct position. At the same time, the locking block 6 accurately engages with the locking hole 11 to complete the final locking.

[0025] Working principle: First, during installation, the mounting block 2 at the bottom of switch 1 is pre-fitted with a rotating key 3 with external threads. Then, the operator aligns the mounting block 2 with the center of the stabilizing block 4 on the base 5 and places it vertically. Then, the operator rotates the rotating key 3 clockwise so that it moves smoothly downward along the threaded guide groove of the mounting block 2 through the internal thread structure. At the same time, the tapered inclined surface below the rotating key 3 begins to make frictional contact with the upper contact surface of the locking block 6. Then, as the rotating key 3 continues to rotate and press down, its tapered surface generates an outward component force, gradually squeezing and pushing the locking block 6 to overcome the resistance of the spring 10 and move smoothly horizontally towards the mounting block 2 in the groove 9 until the protruding structure at the front end of the locking block 6 is completely fitted into the locking hole 11 on the side of the mounting block 2 to form a structural interlock. Finally, the limiting block 7 at the bottom of the mounting block 2 moves precisely downward with the overall structure under the continuous downward pressure of the rotating key 3 and finally embeds into the limiting groove 8 on the upper surface of the base 5 to complete the positioning installation.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An explosion-proof switch with an anti-loosening structure, comprising a switch (1), characterized in that: The bottom of the switch (1) is welded with a mounting block (2), the outer ring of the mounting block (2) is movably fitted with a rotary key (3), the outer ring of the rotary key (3) is fitted with a stabilizing block (4), the inside of the rotary key (3) is welded with a fixing ring (12), the bottom of the stabilizing block (4) is fixedly installed with a base (5), the upper surface of the base (5) is movably provided with a locking block (6), the upper surface of the base (5) is provided with a rectangular groove (9) corresponding to the locking block (6), and the outer ring of the stabilizing block (4) is provided with an annular groove (13).

2. The explosion-proof switch with an anti-loosening structure according to claim 1, characterized in that: The outer surface of the rotary key (3) is provided with threads, the inside of the stabilizing block (4) is provided with internal threads and corresponds to the threads of the rotary key (3), and the lower part of the rotary key (3) that contacts the locking block (6) is a tapered surface.

3. The explosion-proof switch with an anti-loosening structure according to claim 1, characterized in that: The bottom of the mounting block (2) is provided with a limiting block (7), and the center of the upper surface of the base (5) is precisely machined with a matching limiting groove (8), and the outline size of the limiting groove (8) is completely consistent with that of the limiting block (7).

4. The explosion-proof switch with an anti-loosening structure according to claim 1, characterized in that: The depth of the groove (9) is slightly greater than the thickness of the block (6), so that the block (6) can move smoothly in the groove (9) in the vertical direction. A high-strength spring (10) is embedded in one side of the groove (9). One end of the spring (10) is fixed to the side wall of the groove (9), and the other end is in close contact with the bottom of the block (6).

5. An explosion-proof switch with an anti-loosening structure according to claim 1, characterized in that: The mounting block (2) has a matching hole (11) at the corresponding position of the card block (6). The upper end of the card block (6) is formed with a protrusion structure through precision machining, which can be accurately fitted into the hole (11).

6. The explosion-proof switch with an anti-loosening structure according to claim 1, characterized in that: The fixing ring (12) inside the rotary key (3) corresponds to the annular groove (13) on the outer ring of the mounting block (2).

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