CN201349097Y - Moisture-proof terminal box - Google Patents

Abstract

The purpose of this utility model is a moisture-proof terminal box, which includes a box body with a door, a bracket set in the box body, a terminal row and a terminal set on the bracket, and is characterized in that a rubber sealing strip is provided on the box door, There is a condensation temperature controller on the upper part of the terminal block, an air inlet hole on the box wall, a heater at the air inlet hole on the inner wall of the box, an air outlet hole on the box wall, and an air outlet hole on the inner wall of the box. An exhaust fan is provided, and a box body containing a moisture absorbing agent is built in the box; the condensation temperature controller, the heater, and the exhaust fan are electrically connected. Its effects are: 1. Good moisture-proof performance; 2. Good sealing effect; 3. Prolonged the service life of the terminal box; 4. Reduced the number of unplanned power outages, ensuring the safe and stable operation of the power grid; 5. Good economic benefits .

Description

Moisture-proof terminal box

Technical field:

The utility model relates to an improved terminal box in power transmission and transformation lines, in particular to a moisture-proof terminal box.

Background technique:

Most of the existing terminal boxes are composed of a metal box with a door, a bracket inside, a terminal row and terminals on the bracket, and they are generally placed outdoors. One of the biggest problems they have in use is poor moisture resistance, especially in the south of my country, this situation is even more serious. Large temperature difference and high humidity are the characteristics of the environment in southern my country. This phenomenon causes the terminal screws in the terminal box to be rusted, the terminals are corroded, the cables are aging, the insulation between the terminals is reduced, the secondary circuit grounding problems are frequent, and safety accidents continue. Power outages or forced power outages for maintenance have brought losses and inconvenience to the production of enterprises and people's lives. The above problems are caused by the fact that the existing terminal box is not tightly sealed, and water and moisture are easy to enter, the box is not ventilated, the moisture cannot be discharged, and the upper part of the terminal box is prone to condensation.

Invention content:

The purpose of the utility model is to propose a moisture-proof terminal box which has good moisture-proof performance and can better solve the problems existing in the existing terminal box in view of the disadvantage of poor moisture-proof performance in the existing terminal box.

The purpose of this utility model can be achieved through the following technical solutions. A moisture-proof terminal box includes a box body with a door, a bracket set in the box body, a terminal row and terminals set on the bracket, and is characterized in that the box door is equipped with There is a rubber sealing strip, a condensation temperature controller is provided on the upper part of the terminal block, an air inlet hole is provided on the box wall, a heater is provided at the air inlet hole on the inner wall of the box, and an air outlet hole is provided on the box wall. An exhaust fan is provided at the air outlet on the inner wall of the box, and a box body containing a moisture absorbing agent is built in the box; the condensation temperature controller, the heater, and the exhaust fan are electrically connected.

In order to prevent small animals from drilling through the openings of the box and causing safety accidents, the inner walls of all openings on the box wall are equipped with anti-small animal metal mesh.

In order to prevent rainwater from blowing in or splashing in from the openings of the box, rainproof covers are installed above the outer walls of all openings on the box wall.

In order to prevent that when the external humidity is high in winter and the rainy season, the power of the heater is not enough, so that the dropped humidity cannot avoid the humidity that is most likely to cause the terminal to corrode, there are two sets of heaters in the box, and there are two Group heater corresponding circuit.

For the convenience of observing the situation of the moisture-absorbing agent in the box, an observation hole is provided on the lid surface of the box body containing the moisture-absorbing agent.

The effects of the utility model are as follows: 1. The moisture-proof performance is good, which eliminates the problems of terminal screw rust, terminal rust and cable aging due to moisture in the terminal box, and eliminates the potential safety hazards such as DC grounding caused by the terminal box due to moisture. It protects the reliability of the secondary circuit and the firmness of the cable connection on the terminal block. 2. The sealing effect is good, which reduces the frequency of cleaning and maintenance, and reduces the labor intensity of workers. 3. The service life of the terminal box is extended, which can be extended by 3-4 years compared with the service life of the existing terminal box, because the corrosion and aging of the internal parts are greatly reduced. 4. Reduce the number of unplanned power outages and ensure the safe and stable operation of the power grid. 5. The economic benefit is good, which can save a lot of production costs for the enterprise, which not only reduces the replacement of terminal boxes and various parts, but also reduces the number of power outage maintenance.

Below in conjunction with embodiment and accompanying drawing, the utility model is further elaborated:

Description of drawings:

Accompanying drawing 1 is the utility model structural representation (partial cutaway);

Accompanying drawing 2 is the circuit connection schematic diagram among condensation temperature controller, heater, exhaust fan in the utility model.

Detailed ways:

See attached drawings 1 and 2 for a moisture-proof terminal box, which is mainly composed of a box body 1 with a door, a bracket set in the box body 1, a terminal block set on the bracket, and a condensation temperature controller set on the top of the terminal block and the terminal block 2. The heater 3 and the exhaust fan 4 arranged on the wall of the box are composed of a box body 5 built in the box to hold the moisture absorbing agent. The condensation temperature controller 2, the heater 3 and the exhaust fan 4 are electrically connected. Exhaust fan 4 is located at the air exhaust port that casing 1 rear wall top establishes. The heater 3 is arranged at the air inlet at the lower part of the side wall of the casing 1 . The air entering the box body 1 needs to be dehumidified by the heater 3 . The function of the exhaust fan 4 is to discharge the water vapor generated by the heater 3 out of the casing 1 . The condensation temperature controller 2 monitors the air humidity in the box body 1. When the air humidity reaches the action setting value of the condensation temperature controller 2, the heater 3 is started to dehumidify and dehumidify the terminal box and start exhausting at the same time. Fan 4 dehumidifies outwards. In order to prevent water, dust, etc. outside the casing 1 from entering the casing 1, the door of the casing 1 is provided with a rubber seal. The box cover surface of the box body 5 of the moisture absorbing agent is provided with an observation hole, and its function is to check the situation of the moisture absorbing agent in the box. The box body 5 of the moisture absorbing agent is equipped with color-changing silicon, and its function is to keep Air dry and easy to see. In order to prevent small animals from drilling into the holes on the casing 1 wall and causing safety accidents, all opening positions inwalls are equipped with anti-small animal metal mesh 6. For preventing rainwater from being blown in or splashing into from the perforated hole on casing 1 wall, all perforated position outer wall tops all install rainproof cover 7 additionally. Accompanying drawing 2 circuit diagrams are when external humidity is bigger in winter and rainy season, the power of heater 3 is not enough and the humidity after dropping can't avoid the humidity that most easily makes terminal corrode, and it is provided with two heaters 3 (Generally, only one can be set), the condensation temperature controller 2, the heater 3, and the exhaust fan 4 are electrically connected through three unipolar AC air switches 8 and the sensor contacts 9 of the condensation temperature controller 2.

Claims (5)

1. A moisture-proof terminal box, comprising a box body with a door, a bracket set in the box body, a terminal row and terminals arranged on the bracket, it is characterized in that a rubber sealing strip is arranged on the box door, and the upper part of the terminal row is set There is a condensation temperature controller, and there is an air inlet hole on the box wall, a heater at the air inlet hole on the inner wall of the box, an air outlet hole on the box wall, and an exhaust at the air outlet hole on the inner wall of the box. There is a box body containing the moisture absorbing agent inside the box; the condensation temperature controller, the heater, and the exhaust fan are electrically connected. 2. The moisture-proof terminal box according to claim 1, characterized in that, the inner walls of all openings on the box wall are equipped with anti-small animal metal mesh. 3. The moisture-proof terminal box according to claim 1, characterized in that rainproof covers are installed above the outer walls of all openings on the box walls. 4. The moisture-proof terminal box according to claim 1, wherein there are two sets of heaters inside the box and circuits corresponding to the two sets of heaters. 5. The moisture-proof terminal box according to claim 1 or 2 or 3 or 4, characterized in that an observation hole is provided on the cover of the box containing the moisture-absorbing agent.

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