Dustproof explosion-proof control box button

Abstract

The utility model relates to the technical field of explosion -proof control box, in order to solve the problem that the explosion -proof surface of the explosion -proof control box button is easy to block, disclose a dustproof explosion -proof control box button, including explosion -proof control box, be provided with mounting hole on the explosion -proof control box, the small end of ladder shaft sets up in the mounting hole, the big end of ladder shaft is located the outside of explosion -proof control box, and the shoulder of ladder shaft is pressed in the explosion -proof control box and welds sealing, be provided with ladder hole on ladder shaft, the small hole of ladder shaft is slidably provided with main shaft subassembly, the end side of main shaft subassembly that is located the outside of explosion -proof control box is provided with rim along the circumference, the rim and the shoulder between the hole of ladder hole are set up with reset spring on main shaft subassembly, the end cover of big end of ladder shaft is equipped with dustproof cover, the position of circuit board is set up in the inside of explosion -proof control box corresponding main shaft subassembly, the switch on the circuit board corresponds with main shaft subassembly, the utility model effectively prevents the dust of outside from entering the explosion -proof surface, avoids the problem of jamming caused by dust accumulation.

Description

Technical Field

[0001] This utility model relates to the field of explosion-proof control box technology, specifically to a dustproof explosion-proof control box button. Background Technology

[0002] An explosion-proof control box, also known as an explosion-proof control box, is an electrical device specifically designed for controlling, protecting, monitoring, and distributing power to electrical equipment in flammable and explosive hazardous locations. Its core design principle is to safely isolate components within the box that may generate electrical sparks (such as switches, contactors, relays, and instruments) from the external explosive atmosphere, thereby preventing electrical faults inside the box from triggering an explosion in the external environment.

[0003] For example, an explosion-proof button disclosed in application number CN202221047481.8 is installed on an explosion-proof control box and includes: a spindle assembly, the spindle assembly including a first end located inside the explosion-proof control box, a switch assembly being provided at the first end, wherein an explosion-proof assembly is nested and connected to one side of the spindle assembly near the first end, the explosion-proof assembly being connected to the explosion-proof control box, and at least one explosion-proof surface being provided on the explosion-proof assembly.

[0004] When the above-mentioned technical solution is in use, external dust will adhere to the end of the spindle assembly that extends out of the explosion-proof component. When the spindle assembly is pressed, the dust will enter the first explosion-proof surface between the spindle assembly and the explosion-proof component as the spindle assembly moves, thereby hindering the movement of the spindle assembly. Especially in working conditions with a lot of dust, such as mines, the first explosion-proof surface is more likely to be blocked by dust, making it difficult for the spindle assembly to move. Utility Model Content

[0005] To address the aforementioned technical deficiencies, this invention provides a dustproof and explosion-proof control box button that effectively prevents dust from entering between the spindle assembly and the explosion-proof assembly.

[0006] This utility model discloses a dustproof explosion-proof control box button, including an explosion-proof control box with a mounting hole. An explosion-proof component is disposed within the mounting hole. The explosion-proof component includes a stepped shaft, with its small end positioned within the mounting hole and its large end located outside the explosion-proof control box. A shoulder of the stepped shaft presses against the explosion-proof control box, and a weld seal is formed between the shoulder and the explosion-proof control box. A stepped hole is provided on the stepped shaft, with the large hole located at the large end and the small hole located at the small end. A spindle assembly is slidably installed inside the small hole of the stepped shaft. An explosion-proof surface is formed between the spindle assembly and the inner wall of the small hole. The side of the spindle assembly located outside the explosion-proof control box has a circumferential edge. A return spring is fitted on the spindle assembly between the edge and the shoulder of the stepped hole. A dust cover is installed on the large end of the stepped shaft. The dust cover is sealed and fixed to the stepped shaft. The dust cover is made of elastic material. A circuit board is installed inside the explosion-proof control box at the position corresponding to the spindle assembly. A switch is installed on the circuit board, and the position of the switch corresponds to the spindle assembly.

[0007] The principle of the above technical solution is to add a dust cover made of elastic material to the end of the large end of the stepped shaft, which completely seals the explosion-proof surface that is prone to dust intrusion inside. At the same time, by using welding seal, while maintaining the explosion-proof performance, it effectively prevents external dust from entering the gap of moving parts and avoids jamming problems caused by dust accumulation.

[0008] To facilitate the replacement of the dust cover, a first slot is provided on the outer side of the large end of the stepped shaft along the circumference. A ring-shaped protrusion is provided on the inner side of the dust cover corresponding to the position of the first slot. The ring-shaped protrusion is locked in the first slot. A second slot is provided on the outer side of the dust cover corresponding to the position of the ring-shaped protrusion along the circumference. A ring-shaped steel wire spring is provided in the second slot.

[0009] To limit the spindle's travel, a limiting protrusion is provided on the periphery of the edge, and a limiting groove is provided axially on the inner wall of the stepped hole corresponding to the position of the limiting protrusion. The limiting protrusion is slidably positioned within the limiting groove.

[0010] The dustproof explosion-proof control box button obtained by this utility model has the following advantages: by using a dustproof cover made of elastic material and cooperating with the slot structure on the stepped shaft to form a sealed fixation, the explosion-proof surface that is susceptible to dust intrusion is completely sealed inside while maintaining the original explosion-proof performance. This effectively prevents external dust from entering the gaps between moving parts, avoiding jamming problems caused by dust accumulation, and also facilitates the disassembly and replacement of the dustproof cover, thereby improving the reliability and maintenance convenience of the equipment. Attached Figure Description

[0011] Figure 1 This is the front view of the present invention;

[0012] Figure 2 This utility model Figure 1 BB section view;

[0013] Figure 3 This utility model Figure 2 Enlarged view of section A. Detailed Implementation

[0014] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0015] Example 1:

[0016] like Figure 1 , 2 As shown in Figure 3, this utility model discloses a dustproof explosion-proof control box button, including an explosion-proof control box 1. The explosion-proof control box 1 has a mounting hole, and an explosion-proof component is disposed within the mounting hole. The explosion-proof component includes a stepped shaft 8, with its small end disposed within the mounting hole and its large end located outside the explosion-proof control box 1. The shoulder of the stepped shaft 8 presses against the explosion-proof control box 1, and a weld seal is formed between the shoulder of the stepped shaft 8 and the explosion-proof control box 1. The stepped shaft 8 has a stepped hole, with its large hole located at the large end of the stepped shaft 8 and its small hole located at the small end of the stepped shaft 8. A main shaft assembly 9 is slidably disposed within the small hole of the stepped shaft 8, forming an explosion-proof surface between the main shaft assembly 9 and the inner wall of the small hole of the stepped shaft 8. An edge 3 is circumferentially disposed on the side of the main shaft assembly 9 located outside the explosion-proof control box 1, and the edge 3 and the shoulder of the stepped hole... A return spring 12 is fitted on the spindle assembly 9. A limit protrusion 4 is provided on the periphery of the edge 3. A limit groove 5 is provided axially on the inner wall of the large hole of the stepped hole, corresponding to the position of the limit protrusion 4. The limit protrusion 4 is slidably disposed in the limit groove 5. A dust cover 2 is provided on the end of the large end of the stepped shaft 8. The dust cover 2 is made of elastic material. A first slot is provided circumferentially on the outer side of the large end of the stepped shaft 8. An annular protrusion 6 is provided on the inner side of the dust cover 2, corresponding to the position of the first slot. The annular protrusion 6 is locked in the first slot. A second slot is provided circumferentially on the outer side of the dust cover 2, corresponding to the position of the annular protrusion 6. An annular steel wire spring 7 is provided in the second slot. A circuit board 11 is provided inside the explosion-proof control box 1, corresponding to the position of the spindle assembly 9. A switch 10 is provided on the circuit board 11, and the position of the switch 10 corresponds to that of the spindle assembly 9.

[0017] The principle of the above technical solution is to add a dust cover 2 made of elastic material to the end of the stepped shaft 8, which completely seals the explosion-proof surface that is prone to dust intrusion inside. At the same time, by using welding seal, while maintaining the explosion-proof performance, it effectively prevents external dust from entering the gap of moving parts and avoids jamming problems caused by dust accumulation.

Claims

1. A dustproof and explosion-proof control box button, characterized in that: The system includes an explosion-proof control box with mounting holes. An explosion-proof assembly is installed within these holes. The assembly includes a stepped shaft, with its small end positioned within the mounting holes and its large end located outside the control box. A shoulder of the stepped shaft presses against the control box, and a weld seal is formed between the shoulder and the control box. The stepped shaft also has stepped holes, with the large hole located at the large end and the small hole at the small end. A main shaft slides within the small hole of the stepped shaft. The components include a main spindle assembly and a stepped shaft with a small hole forming an explosion-proof surface. The side of the main spindle assembly located outside the explosion-proof control box has a circumferential edge. A return spring is fitted on the main spindle assembly between the edge and the shoulder of the stepped hole. A dust cover is provided at the large end of the stepped shaft. The dust cover is sealed and fixed to the stepped shaft. The dust cover is made of elastic material. A circuit board is provided inside the explosion-proof control box at the position corresponding to the main spindle assembly. A switch is provided on the circuit board, and the position of the switch corresponds to the main spindle assembly.

2. The dustproof and explosion-proof control box button according to claim 1, characterized in that: A first slot is provided on the outer side of the large end of the stepped shaft along the circumference. An annular protrusion is provided on the inner side of the dust cover corresponding to the position of the first slot. The annular protrusion is locked in the first slot. A second slot is provided on the outer side of the dust cover corresponding to the position of the annular protrusion along the circumference. An annular steel wire spring is provided in the second slot.

3. A dustproof and explosion-proof control box button according to claim 1 or 2, characterized in that: A limiting protrusion is provided on the periphery of the edge, and a limiting groove is provided on the inner wall of the stepped hole at the position corresponding to the limiting protrusion along the axis. The limiting protrusion is slidably disposed in the limiting groove.

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