Coal mine underground explosion-proof charger

Abstract

The utility model discloses a coal mine underground explosion-proof charger, which comprises an explosion-proof box body, a heat dissipation box and a charging gun, and is characterized in that the interior of the explosion-proof box body is divided into a cable cavity, a control cavity, a pressure reduction cavity and a rectification cavity; an inner circulating water path and an outer circulating water path are respectively arranged in the rectifying cavity and the heat dissipation box, so that the overall heat dissipation efficiency is improved, impurities or pollutants in external cooling liquid can be prevented from entering a cooling system of the charging module, and the charging module is protected from being damaged; meanwhile, the independent cooling system means that even if the external circulating water pump breaks down, normal work of the charging module cannot be affected immediately, and the reliability and stability of the whole charging system are further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of explosion-proof equipment, in particular to an explosion-proof charger for underground coal mines. Background Art

[0002] At present, electric explosion-proof electric vehicles are gradually becoming the main vehicles for transporting people, materials and inspections in coal mines. However, due to the limited space resources and special environment underground, existing chargers often face several significant technical challenges when charging mobile devices such as electric vehicles.

[0003] First, the space underground in coal mines is small, and traditional charger heat dissipation designs often struggle to adapt to the compact working environment. This causes heat to quickly accumulate around the charger and be unable to dissipate effectively. This not only reduces the charger's charging efficiency but can also cause safety accidents such as fires due to overheating.

[0004] Secondly, underground coal mine gas is lighter than air and tends to accumulate in enclosed or semi-enclosed spaces, particularly around electrical equipment like chargers. When the gas concentration inside a charger reaches a certain level, it can easily cause a gas explosion if it encounters an electric spark or other ignition source.

[0005] Therefore, it is necessary to propose a kind of underground explosion-proof charger in coal mine to remedy above-mentioned defect. Utility Model Content

[0006] The purpose of the present invention is to overcome the above technical deficiencies, propose an explosion-proof charger for underground coal mines, and solve the technical problems raised in the background technology.

[0007] In order to achieve the above technical objectives, the technical solution of the present invention provides an explosion-proof charger for underground coal mines, including: a flameproof box, a heat dissipation box and a charging gun, the flameproof box is divided into a cable chamber, a control chamber, a pressure reduction chamber and a rectifier chamber; a radiator, an explosion-proof motor, an external circulation pump and an expansion kettle are arranged in the heat dissipation box; a hanging bracket is provided on the flameproof box, and the charging gun is arranged on the hanging bracket; a circuit breaker is provided in the control chamber, a transformer is provided in the pressure reduction chamber, and a water-cooled charging module is provided in the rectifier chamber, the output end of the explosion-proof motor is provided with a fan and is connected to the drive shaft of the external circulation pump, the input end of the external circulation pump is connected to one end of the water channel of the water-cooled charging module, the output end is connected to the water inlet end of the expansion kettle, the water outlet end of the expansion kettle is connected to the water inlet end of the radiator, and the water outlet end of the radiator is connected to the other end of the water channel of the water-cooled charging module.

[0008] Furthermore, a heat exchange chamber is provided below the rectification chamber, a heat exchanger and an internal circulation pump are provided in the heat exchange chamber, an internal circulation water tank is provided in the rectification chamber, the water path of the water-cooled charging module is connected with the internal circulation water tank, the internal circulation pump and the inner pipe of the heat exchanger, and the shell of the heat exchanger is connected with the radiator and the external circulation pump.

[0009] Furthermore, the heat dissipation box is arranged on an upper part of one side of the flameproof box, the heat dissipation box is communicated with the interior of the flameproof box, and the communication part between the flameproof box and the heat dissipation box is on the air inlet side of the fan.

[0010] Furthermore, the external power supply is connected to the input end of the circuit breaker through the cable cavity, the output end of the circuit breaker is electrically connected to the high-voltage side of the transformer, the low-voltage side of the transformer is connected to the power supply end of the water-cooled charging module, and the output end of the water-cooled charging module is electrically connected to the charging gun through the cable cavity. A manual operating mechanism is provided on the circuit breaker, and the handle of the manual operating mechanism is provided on the outer wall of the control cavity.

[0011] Furthermore, the transformer is a dry-type transformer, which is connected to the bottom and inner wall of the flameproof box, and a plurality of heat dissipation fins are provided on the outer side of the flameproof box.

[0012] Compared with the prior art, the beneficial effects of the present invention include:

[0013] 1. The present invention combines a heat dissipation box with an explosion-proof housing, and separates the internal and external circulating water circuits. This not only improves the overall heat dissipation efficiency, but also prevents impurities or contaminants in the external coolant from entering the cooling system of the charging module, thereby protecting the charging module from damage. At the same time, the independent cooling system means that even if the external circulating water pump fails, it will not immediately affect the normal operation of the charging module, further improving the reliability and stability of the entire charging system.

[0014] 2. By placing the connection between the heat sink and the flameproof enclosure on the fan's air inlet side, this design creates a negative pressure inside the enclosure when the fan rotates, effectively preventing gas from accumulating at the top of the enclosure. This design significantly reduces gas concentration inside the charger, minimizing the risk of gas explosions and significantly safeguarding underground coal mine operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a front view of an explosion-proof charger for underground coal mines provided by the utility model;

[0016] Figure 2 This is a top view of the structure of an explosion-proof charger for underground coal mines provided by the utility model;

[0017] Figure 3This is a front view structural diagram of an explosion-proof charger for underground coal mines provided by the utility model. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is 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 the present invention and are not intended to limit the present invention.

[0019] Reference Figures 1-3 The present invention provides an explosion-proof charger for underground coal mines, which is mainly composed of a flameproof box 1, a heat dissipation box 2 and a charging gun 3. The interior of the flameproof box 1 is divided into a cable chamber 101, a control chamber 102, a pressure reduction chamber 103 and a rectifier chamber 104.

[0020] The heat dissipation box 2 is installed on the upper side of the explosion-proof box 1, and the heat dissipation box 2 is connected to the interior of the explosion-proof box 1. The heat dissipation box 2 is equipped with a radiator 11, an explosion-proof motor 11, an external circulation pump and a water expansion pot 17; the output end of the explosion-proof motor 11 is connected to the fan 12, and at the same time is connected to the drive shaft of the external circulation pump. This design allows the explosion-proof motor 11 to drive the fan 12 for heat dissipation while also driving the external circulation pump for water circulation, thereby improving the overall heat dissipation efficiency. In addition, the connecting part between the explosion-proof box 1 and the heat dissipation box 2 is on the air inlet side of the fan 12. When the fan 12 rotates, a certain negative pressure is generated in the explosion-proof box 1, thereby preventing gas from gathering at the top of the explosion-proof box 1.

[0021] In a specific implementation, a circuit breaker 7 is provided in the control chamber 102 for controlling the on and off of the circuit; a manual operating mechanism is also provided on the circuit breaker 7, and a handle 6 of the manual operating mechanism is provided on the outer wall of the control chamber 102 for user convenience.

[0022] A transformer 8 is installed in the step-down chamber 103. The transformer 8 is a dry-type transformer and is connected to the bottom and inner wall of the flameproof box 1. The heat generated by the transformer 8 during operation is conducted to the flameproof box 1. A number of heat dissipation fins 106 are also provided on the outside of the flameproof box 1 to further increase the heat dissipation area and improve the heat dissipation effect.

[0023] A water-cooled charging module 9 is provided in the rectification cavity 104, a heat exchange cavity 105 is provided below the rectification cavity 104, a heat exchanger 15 and an internal circulation pump 16 are provided in the heat exchange cavity 105, and the water path of the water-cooled charging module 9 is connected with the internal circulation water tank 14, the internal circulation pump 16 and the inner pipe of the heat exchanger 15, forming an internal circulation water path. The shell of the heat exchanger 15 is connected with the radiator 11 and the external circulation pump, forming an external circulation water path. This design allows the heat generated by the water-cooled charging module 9 to be transferred to the heat exchanger 15 through the internal circulation water path, and then dissipated to the heat dissipation box 2 through the external circulation water path.

[0024] The separate design of the internal and external circuits can prevent impurities or pollutants in the external coolant from entering the cooling system of the charging module, thus protecting the charging module from damage; the independent cooling system means that even if the external circulation water pump fails, it will not immediately affect the normal operation of the charging module, which helps to improve the reliability and stability of the entire charging system.

[0025] During assembly, the external power supply 4 passes through the cable cavity 101 and is connected to the input end of the circuit breaker 7 to provide power for the entire device. The output end of the circuit breaker 7 is electrically connected to the high-voltage side of the transformer 8, and the low-voltage side of the transformer 8 is connected to the power supply end of the water-cooled charging module 9. The output end of the water-cooled charging module 9 passes through the cable cavity 101 and is electrically connected to the charging gun 3 to provide charging services for mobile devices such as electric vehicles. In addition, a hanging bracket 5 is provided on the explosion-proof box body 1, and the charging gun 3 is fixed on the hanging bracket 5 for easy access during charging.

[0026] The specific implementation manners of the present utility model described above do not constitute a limitation on the protection scope of the present utility model. Any other corresponding changes and deformations made according to the technical concept of the present utility model shall be included in the protection scope of the claims of the present utility model.

Claims

1. An explosion-proof charger for underground coal mines, comprising: An explosion-proof enclosure, which is divided into a cable chamber, a control chamber, a step-down chamber and a rectification chamber inside; A heat dissipation box, in which a radiator, an explosion-proof motor, an external circulation pump and an expansion water kettle are arranged; A charging gun, a hanging rack is arranged on the explosion-proof enclosure, and the charging gun is arranged on the hanging rack; It is characterized in that: a circuit breaker is arranged in the control chamber, a transformer is arranged in the step-down chamber, a water-cooled charging module is arranged in the rectification chamber, a fan is arranged at the output end of the explosion-proof motor and is connected to the drive shaft of the external circulation pump, the input end of the external circulation pump is communicated with one end of the water circuit of the water-cooled charging module, the output end is communicated with the water inlet end of the expansion water kettle, the water outlet end of the expansion water kettle is communicated with the water inlet end of the radiator, and the water outlet end of the radiator is communicated with the other end of the water circuit of the water-cooled charging module.

2. The explosion-proof charger for underground coal mines according to claim 1, wherein: A heat exchange chamber is arranged below the rectification chamber, a heat exchanger and an internal circulation pump are arranged in the heat exchange chamber, an internal circulation water tank is arranged in the rectification chamber, the water circuit of the water-cooled charging module is communicated with the internal circulation water tank, the internal circulation pump and the inner tube of the heat exchanger, and the shell of the heat exchanger is communicated with the radiator and the external circulation pump.

3. The explosion-proof charger for underground coal mines according to claim 2, characterized in that: The heat dissipation box is arranged at the upper part of one side of the explosion-proof enclosure, the heat dissipation box is communicated with the inside of the explosion-proof enclosure, and the communication part between the explosion-proof enclosure and the heat dissipation box is on the air inlet side of the fan.

4. A mine underground explosion-proof charger according to claim 2 or 3, characterized in that: The external power supply passes through the cable chamber and is connected to the input end of the circuit breaker, the output end of the circuit breaker is electrically connected to the high-voltage side of the transformer, the low-voltage side of the transformer is connected to the power supply end of the water-cooled charging module, the output end of the water-cooled charging module passes through the cable chamber and is electrically connected to the charging gun, a manual operating mechanism is arranged on the circuit breaker, and the handle of the manual operating mechanism is arranged on the outer wall of the control chamber.

5. The explosion-proof battery charger for underground coal mines according to claim 4, characterized in that: The transformer is a dry-type transformer, the transformer is connected to the bottom and inner wall of the explosion-proof enclosure, and a plurality of heat dissipation fins are arranged on the outside of the explosion-proof enclosure.

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