An explosion-proof intelligent switch

Abstract

This utility model discloses an explosion-proof intelligent switch, including an explosion-proof housing, an explosion-proof cover, a circuit board, and a heat dissipation mechanism. The explosion-proof cover is connected to the explosion-proof housing; the circuit board is installed inside the explosion-proof housing; the heat dissipation mechanism includes an evaporator, a reflux pipe, and a condenser. The evaporator and reflux pipe are located inside the explosion-proof housing, with the evaporator attached to the circuit board. The reflux pipe passes through the explosion-proof housing, and the condenser is located on the top outer side of the explosion-proof housing. The evaporator, reflux pipe, and condenser are sequentially connected, and coolant is contained within each of the evaporator, reflux pipe, and condenser. The beneficial effects of this utility model are: the heat dissipation system composed of the evaporator, reflux pipe, and condenser does not damage the explosion-proof structure; through the phase change circulation of the coolant, it ensures that the electronic components operate within a safe operating temperature range, extends the service life of the intelligent switch, and reduces the probability of failure due to overheating.

Description

Technical Field

[0001] This utility model relates to the field of intelligent switches, specifically to an explosion-proof intelligent switch. Background Technology

[0002] In many industrial sectors such as petroleum, chemical, and coal mining, flammable and explosive gases, dust, and other hazardous substances are often present in the production environment. In these special environments, electrical sparks and arcs generated by electrical equipment can trigger explosions, causing serious casualties and property damage. While traditional switchgear possesses basic switching functions, it suffers from significant deficiencies in explosion-proof performance and intelligence.

[0003] Chinese utility model patent CN217386959U discloses an explosion-proof intelligent switch, including an intelligent switch circuit board and multiple switches on the intelligent switch circuit board, as well as an explosion-proof housing. The explosion-proof housing has a mounting cavity for mounting the intelligent switch circuit board. The front of the explosion-proof housing has a mounting port and an explosion-proof cover to close the mounting port. One side of the explosion-proof housing has an explosion-proof antenna and an explosion-proof cable clamping and sealing joint, and the other side has multiple regularly arranged explosion-proof buttons. The intelligent switch circuit board includes a base circuit board and a vertical circuit board fixed to the base circuit board. The switches are arranged on the vertical circuit board and correspond one-to-one with the positions of each explosion-proof button.

[0004] The aforementioned technologies have the following drawbacks: the explosion-proof housing and explosion-proof cover are completely sealed, and the heat generated by the circuit board cannot be dissipated in time, affecting the normal operation of the smart switch. Utility Model Content

[0005] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose an explosion-proof intelligent switch to solve the technical problem that the heat inside the explosion-proof housing cannot be dissipated in a timely manner in the prior art.

[0006] To achieve the above technical objectives, the present invention provides an explosion-proof intelligent switch, including an explosion-proof housing;

[0007] An explosion-proof cover, which is connected to the explosion-proof housing;

[0008] The circuit board is mounted inside an explosion-proof housing; and,

[0009] The heat dissipation mechanism includes an evaporator, a return pipe, and a condenser. The evaporator and the return pipe are located inside an explosion-proof housing. The evaporator is attached to a circuit board. The return pipe passes through the explosion-proof housing. The condenser is located on the top of the outer side of the explosion-proof housing. The evaporator, the return pipe, and the condenser are connected in sequence. Coolant is contained inside the evaporator, the return pipe, and the condenser.

[0010] In some embodiments, the condenser tube is inclined and gradually decreases in elevation from the side away from the return pipe to the side closer to the return pipe.

[0011] In some embodiments, the heat dissipation mechanism further includes heat dissipation fins, and a plurality of heat dissipation fins are spaced apart on the condenser tube along the length of the condenser tube.

[0012] In some embodiments, the heat dissipation mechanism further includes an air duct connected to the top of the explosion-proof housing, and the condenser pipe is located inside the air duct.

[0013] In some embodiments, both ends of the air duct are open.

[0014] In some embodiments, the heat dissipation mechanism further includes a replenishment chamber and a valve, wherein the replenishment chamber stores coolant and is connected to the end of the condenser tube away from the return pipe via the valve.

[0015] In some embodiments, the heat dissipation mechanism further includes a fixing component and a sealing component. The fixing component is used to fix the return pipe to the explosion-proof housing, and the sealing component is used to improve the airtightness between the return pipe and the explosion-proof housing.

[0016] In some embodiments, the fixing assembly includes a flange and a bolt. The flange is coaxially connected to the return pipe and abuts against the explosion-proof housing. The flange has a through hole, and the explosion-proof housing has a threaded hole. The bolt passes through the through hole and is threaded into the threaded hole.

[0017] In some embodiments, the sealing assembly includes a convex rubber strip and a concave rubber strip, the convex rubber strip being connected to a flange and the concave rubber strip being connected to an explosion-proof housing, the concave rubber strip being used to accommodate the convex rubber strip.

[0018] In some embodiments, the sealing assembly further includes explosion-proof sealant located between the convex and concave sealant strips.

[0019] Compared with the prior art, the beneficial effects of this utility model include: the heat dissipation system composed of evaporator, reflux pipe and condenser does not damage the explosion-proof structure, and through the phase change circulation of coolant, it ensures that electronic components operate within a safe operating temperature range, extends the service life of intelligent switches, and reduces the probability of failure due to overheating. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the explosion-proof intelligent switch provided by this utility model;

[0021] Figure 2 This utility model provides Figure 1 Enlarged view of the local structure at point A in the middle.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Explosion-proof housing; 2. Explosion-proof cover; 3. Circuit board; 4. Heat dissipation mechanism; 41. Evaporator tube; 42. Return tube; 43. Condenser tube; 44. Heat dissipation fins; 45. Air duct; 46. Replenishment chamber; 47. Valve; 48. Fixing assembly; 481. Flange; 482. Bolt; 483. Through hole; 484. Screw hole; 49. Sealing assembly; 491. Convex rubber strip; 492. Concave rubber strip; 493. Explosion-proof putty. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0025] This utility model provides an explosion-proof intelligent switch, the structure of which is as follows: Figure 1 - Figure 2 As shown, it includes an explosion-proof housing 1, an explosion-proof cover 2, a circuit board 3, and a heat dissipation mechanism 4.

[0026] The explosion-proof cover 2 is connected to the explosion-proof housing 1.

[0027] The circuit board 3 is installed inside the explosion-proof housing 1.

[0028] The heat dissipation mechanism 4 includes an evaporator 41, a return pipe 42, and a condenser 43. The evaporator 41 and the return pipe 42 are located inside the explosion-proof housing 1. The evaporator 41 is attached to the circuit board 3. The return pipe 42 passes through the explosion-proof housing 1. The condenser 43 is located on the top of the outer side of the explosion-proof housing 1. The evaporator 41, the return pipe 42, and the condenser 43 are connected in sequence. Coolant is contained in the evaporator 41, the return pipe 42, and the condenser 43.

[0029] During operation, the evaporator tube 41 is tightly fitted to the circuit board 3. When the circuit board 3 generates heat, the heat is rapidly conducted to the wall of the evaporator tube 41. The coolant inside the evaporator tube 41 absorbs heat, its temperature rises to its boiling point, and it begins to boil and evaporate, changing from a liquid to a gaseous state. This effectively removes heat from the circuit board 3. The gaseous coolant rises due to its increased temperature and decreased density, flowing rapidly towards the condenser tube 43 located at the top outside the explosion-proof housing 1. The condenser tube 43 is exposed to the air outside the explosion-proof housing 1. When the high-temperature gaseous coolant flows into the condenser tube 43, it exchanges heat with the low-temperature air. Heat is dissipated into the surrounding environment through the wall of the condenser tube 43, and the gaseous coolant gradually cools and condenses back into a liquid state. The condensed liquid coolant, under the influence of gravity, flows back along the return pipe 42 to the evaporator tube 41 inside the explosion-proof housing 1, completing a full coolant cycle and achieving efficient heat dissipation.

[0030] In this invention, the heat dissipation system composed of evaporator 41, reflux pipe 42 and condenser 43 does not damage the explosion-proof structure. Through the phase change circulation of the coolant, it ensures that the electronic components operate within a safe operating temperature range, extends the service life of the intelligent switch, and reduces the probability of failure due to overheating.

[0031] To ensure a smoother return of the liquid coolant from the condenser coil 43 to the evaporator coil 41, please refer to... Figure 1 In a preferred embodiment, the condenser tube 43 is inclined and gradually decreases in elevation from the side away from the return tube 42 toward the side closer to the return tube 42.

[0032] During use, the condenser tube 43 gradually slopes down from the end furthest from the return tube 42 towards the end closest to the return tube 42, creating an inclined slope. This allows the condensed liquid coolant to flow more smoothly along the tube wall towards the return tube 42 under the influence of gravity. This prevents liquid accumulation in the condenser tube 43 due to poor return flow and ensures the continuity of coolant circulation.

[0033] To improve the condensation efficiency of gaseous coolant, please refer to... Figure 1 In a preferred embodiment, the heat dissipation mechanism 4 further includes heat dissipation fins 44, and a plurality of heat dissipation fins 44 are spaced apart on the condenser tube 43 along the length direction of the condenser tube 43.

[0034] In use, the heat dissipation fins 44 are spaced apart along the length of the condenser tube 43, expanding the heat dissipation area of ​​the condenser tube 43 from the simple outer wall area to a composite area of ​​the tube surface and the fin surface. This significantly accelerates the condensation rate of the gaseous coolant.

[0035] To guide airflow in a directional manner, please refer to... Figure 1In a preferred embodiment, the heat dissipation mechanism 4 further includes an air duct 45, which is connected to the top of the explosion-proof housing 1, and the condenser pipe 43 is located inside the air duct 45.

[0036] During use, the air duct 45 constrains the airflow, preventing airflow diffusion and turbulence, and ensuring that the airflow passes through the condenser tube 43 at a stable speed. The stable airflow can continuously and efficiently remove heat from the surface of the condenser tube 43, reducing fluctuations in heat dissipation efficiency caused by unstable airflow and ensuring the stability of the heat dissipation system.

[0037] To further accelerate the condensation efficiency of gaseous coolant, please refer to... Figure 1 In a preferred embodiment, both ends of the air duct 45 are open.

[0038] When in use, the open ends maximize air delivery efficiency and further accelerate the condensation efficiency of the gaseous coolant.

[0039] To replenish lost coolant in a timely manner, please refer to... Figure 1 In a preferred embodiment, the heat dissipation mechanism 4 further includes a replenishment chamber 46 and a valve 47. The replenishment chamber 46 stores coolant and is connected to the end of the condenser pipe 43 away from the return pipe 42 via the valve 47.

[0040] During use, under high temperature and high load operating conditions, coolant will be lost due to continuous phase change evaporation. The coolant in the replenishment chamber 46 can be automatically replenished to the condenser tube 43 under the control of valve 47 to ensure stable heat dissipation efficiency.

[0041] To improve the stability and airtightness between the return pipe 42 and the explosion-proof housing 1, please refer to... Figure 2 In a preferred embodiment, the heat dissipation mechanism 4 further includes a fixing component 48 and a sealing component 49. The fixing component 48 is used to fix the return pipe 42 to the explosion-proof housing 1, and the sealing component 49 is used to improve the airtightness between the return pipe 42 and the explosion-proof housing 1.

[0042] During use, the fixing component 48 securely fixes the return pipe 42 to the explosion-proof housing 1, preventing pipe displacement due to equipment vibration or external impact. The sealing component 49 improves the airtightness between the return pipe 42 and the explosion-proof housing 1, thereby enhancing the explosion-proof performance.

[0043] To secure the return pipe 42 to the explosion-proof housing 1, please refer to... Figure 2In a preferred embodiment, the fixing component 48 includes a flange 481 and a bolt 482. The flange 481 is coaxially connected to the return pipe 42 and abuts against the explosion-proof housing 1. The flange 481 is provided with a through hole 483, and the explosion-proof housing 1 is provided with a screw hole 484. The bolt 482 passes through the through hole 483 and is threaded into the screw hole 484.

[0044] In use, flange 481 is coaxially welded or clamped to the end of return pipe 42, forming a circular plane that fits against the explosion-proof housing 1. When flange 481 abuts against the housing, its annular structure evenly distributes the radial and axial loads of return pipe 42 to the housing surface, avoiding localized deformation caused by single-point stress. When bolt 482 is tightened, axial tension is applied through the threads, which in turn causes flange 481 to be subjected to tensile force and press against the sealing surface, resulting in elastic deformation of the sealing surface and fixing return pipe 42 to the housing.

[0045] To improve the airtightness between the return pipe 42 and the explosion-proof housing 1, please refer to... Figure 2 In a preferred embodiment, the sealing assembly 49 includes a convex rubber strip 491 and a concave rubber strip 492. The convex rubber strip 491 is connected to the flange 481, and the concave rubber strip 492 is connected to the explosion-proof housing 1. The concave rubber strip 492 is used to accommodate the convex rubber strip 491.

[0046] During use, the convex rubber strip 491 and the concave rubber strip 492 interlock to form a double sealing structure with convex and concave interlocking. When the flange 481 is fastened to the explosion-proof housing 1 by bolts 482, the convex rubber strip 491 is squeezed into the groove of the concave rubber strip 492, forming two lines of sealing.

[0047] To further improve the airtightness of the explosion-proof enclosure 1, please refer to... Figure 2 In a preferred embodiment, the sealing assembly 49 further includes explosion-proof putty 493, which is located between the convex rubber strip 491 and the concave rubber strip 492.

[0048] When in use, the explosion-proof putty 493 has high elasticity and plasticity. When filled into the gap between the convex rubber strip 491 and the concave rubber strip 492, it can form a double explosion-proof barrier with elasticity and plasticity.

[0049] To better understand this utility model, the following is combined with... Figure 1 - Figure 2The working principle of an explosion-proof intelligent switch according to this utility model is described in detail: The evaporator tube 41 is tightly attached to the circuit board 3. When the circuit board 3 generates heat during operation, the heat is rapidly conducted to the wall of the evaporator tube 41. The coolant inside the evaporator tube 41 absorbs heat, its temperature rises to the boiling point, and it begins to boil and evaporate, changing from a liquid to a gaseous state. This effectively removes heat from the circuit board 3. The gaseous coolant rises due to its increased temperature and decreased density, flowing rapidly to the condenser tube 43 located at the top outside the explosion-proof housing 1. The condenser tube 43 is exposed to the air outside the explosion-proof housing 1. When the high-temperature gaseous coolant flows into the condenser tube 43, it exchanges heat with the low-temperature air outside. Heat is dissipated to the surrounding environment through the wall of the condenser tube 43, and the gaseous coolant gradually cools and condenses back into a liquid state. The condensed liquid coolant, relying on gravity, flows back along the return pipe 42 to the evaporator tube 41 located inside the explosion-proof housing 1, completing a full coolant cycle and achieving efficient heat dissipation.

[0050] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. An explosion-proof intelligent switch, characterized in that, include: Explosion-proof enclosure; An explosion-proof cover, which is connected to an explosion-proof housing; A circuit board, wherein the circuit board is installed inside an explosion-proof housing; as well as, The heat dissipation mechanism includes an evaporator, a return pipe, and a condenser. The evaporator and the return pipe are located inside an explosion-proof housing. The evaporator is attached to a circuit board. The return pipe passes through the explosion-proof housing. The condenser is located on the top of the outer side of the explosion-proof housing. The evaporator, the return pipe, and the condenser are connected in sequence. Coolant is contained inside the evaporator, the return pipe, and the condenser.

2. The explosion-proof intelligent switch according to claim 1, characterized in that, The condenser tube is inclined and gradually decreases in height from the side away from the return pipe to the side closer to the return pipe.

3. The explosion-proof intelligent switch according to claim 1, characterized in that, The heat dissipation mechanism also includes heat dissipation fins, and a plurality of heat dissipation fins are connected to the condenser tube at intervals along the length of the condenser tube.

4. The explosion-proof intelligent switch of claim 1, wherein, The heat dissipation mechanism also includes an air duct, which is connected to the top of the explosion-proof housing, and the condenser is located inside the air duct.

5. The explosion-proof intelligent switch according to claim 4, characterized in that, Both ends of the air duct are open.

6. The explosion-proof intelligent switch of claim 1, wherein, The heat dissipation mechanism also includes a replenishment chamber and a valve. The replenishment chamber stores coolant and is connected to the end of the condenser tube away from the return pipe via the valve.

7. The explosion-proof intelligent switch of claim 1, wherein, The heat dissipation mechanism also includes a fixing component and a sealing component. The fixing component is used to fix the return pipe to the explosion-proof housing, and the sealing component is used to improve the airtightness between the return pipe and the explosion-proof housing.

8. The explosion-proof intelligent switch according to claim 7, characterized in that, The fixing assembly includes a flange and bolts. The flange is coaxially connected to the return pipe and abuts against the explosion-proof housing. The flange has a through hole, and the explosion-proof housing has a screw hole. The bolt passes through the through hole and is threaded into the screw hole.

9. The explosion-proof intelligent switch according to claim 8, characterized in that, The sealing assembly includes a convex rubber strip and a concave rubber strip. The convex rubber strip is connected to the flange, and the concave rubber strip is connected to the explosion-proof housing. The concave rubber strip is used to accommodate the convex rubber strip.

10. The explosion-proof intelligent switch according to claim 9, characterized in that, The sealing assembly also includes explosion-proof sealant, which is located between the convex and concave rubber strips.

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