CN204947352U - A kind of high-tension switch cabinet - Google Patents

Abstract

The utility model discloses a high-voltage switch cabinet, which belongs to the technical field of power supply equipment, and comprises a cabinet body and a cabinet door, a sealing strip is arranged between the cabinet body and the cabinet door, and a nitrogen generator is arranged on the top of the cabinet body , an insulating shock-absorbing pad is provided between the nitrogen generator and the cabinet, the nitrogen generator is connected to a nitrogen storage tank, and the nitrogen storage tank is arranged on the top of the cabinet and outside the cabinet , the cabinet is provided with an inlet pipe connected to the nitrogen storage tank, the inlet pipe is located at the top of the cabinet, and the bottom of the cabinet is provided with an outlet pipe connected to a flow A regulating valve; the nitrogen generator is connected with a first ground wire. The utility model can effectively prevent the aging of the electrical components in the cabinet, prevent the external dust from entering the cabinet, improve the safe use performance, and is widely used in power supply systems.

Description

A high voltage switch cabinet

technical field

The utility model relates to the technical field of power supply equipment, in particular to a high-voltage switch cabinet.

Background technique

Both production enterprises and power supply management departments need to use a large number of switch cabinets to house various control switches, motors, generators or other control equipment. With the development of industry, all walks of life have increasing requirements for power supply reliability and stability of power systems. High-voltage switchgear plays the role of closing and breaking power lines, which is very important for the safe and reliable operation of power systems. meaning. The high-voltage switchgear generally has a busbar room, an overvoltage device, a relay instrument room, a disconnector, a circuit breaker room, etc.

At present, the high-voltage switchgear mainly has the following problems: First, the long-term operation of the high-voltage switchgear will inevitably cause phenomena such as overload operation and switch aging. If this hidden danger is eliminated in time, it is easy to cause an electric fire, so it is very important to ensure the smooth flow of air inside the switchgear. Second, since electrical equipment is in operation, it will inevitably have a huge attraction to dust, so the dust outside the high-voltage switchgear can easily enter the cabinet, causing accidental short-circuit of the equipment and causing huge losses.

Therefore, for developing a new high-voltage switch cabinet, changing the traditional structure not only has urgent research value, but also has good economic benefits and industrial application potential, which is the power and basis for the completion of the utility model.

Utility model content

In order to overcome the defects of the prior art pointed out above, the inventor has conducted in-depth research on this, and after paying a lot of creative work, thus completed the utility model.

Specifically, the technical problem to be solved by the utility model is: to provide a high-voltage switch cabinet, which can effectively prevent the aging of electrical components in the cabinet, prevent external dust from entering the cabinet, and improve the safe use performance.

In order to solve the above technical problems, the technical solution of the utility model is to provide a high-voltage switch cabinet, including a cabinet body and a cabinet door, a sealing strip is provided between the cabinet body and the cabinet door, and a A nitrogen generator, an insulating shock absorber is provided between the nitrogen generator and the cabinet, the nitrogen generator is connected to a nitrogen storage tank, the nitrogen storage tank is arranged on the top of the cabinet and is located in the cabinet The outer side of the cabinet body, the cabinet body is provided with an air intake pipe connected to the nitrogen storage tank, the air intake pipe is located at the top position of the cabinet body, and an air outlet pipe is provided at the bottom position of the cabinet body, and the air outlet pipe A flow regulating valve is connected; the nitrogen generator is connected with a first ground wire.

In the high-voltage switchgear of the present utility model, as a preferred technical solution, an overflow valve is provided on the air inlet pipe.

In the high-voltage switchgear of the present utility model, as a preferred technical solution, a pressure gauge is provided on the outlet pipe between the flow regulating valve and the cabinet body.

In the high-voltage switchgear of the present utility model, as a preferred technical solution, the bottom of the cabinet is connected with a second grounding wire.

After adopting above-mentioned technical scheme, the beneficial effect of the utility model is:

(1) Since the positive pressure of nitrogen in the cabinet is always maintained in the working state, on the one hand, it can effectively prevent the oxidation of electrical components and wires, and prolong the service life of electrical components. On the other hand, due to the positive pressure of nitrogen in the cabinet from leakage It can effectively prevent external dust from entering the cabinet, avoid various dangerous accidents caused by dust, and improve safety performance.

(2) Since the nitrogen generator is connected to the first grounding wire, and the bottom of the cabinet is connected to the second grounding wire, the grounding of the cabinet and the nitrogen generator are set separately, which avoids the nitrogen generator from interfering with the switch cabinet and further improves safety Use performance.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment;

Wherein, in FIG. 1 , each numeral signifies the following specific meanings, elements and/or components respectively.

In the figure: 1. Cabinet body, 2. Cabinet door, 3. Sealing strip, 4. Handle, 5. Nitrogen generator, 6. Nitrogen storage tank, 7. Intake pipe, 8. Overflow valve, 9. Insulation and shock absorption Pad, 10, outlet pipe, 11, flow regulating valve, 12, pressure gauge, 13, first ground wire, 14, second ground wire, 15, one-way valve.

detailed description

Below in conjunction with accompanying drawing and embodiment the utility model is further described. However, the use and purpose of these exemplary embodiments are only used to illustrate the utility model, and do not constitute any form of any limitation on the actual protection scope of the utility model, let alone limit the protection scope of the utility model thereto.

As shown in Figure 1, the utility model provides a high-voltage switch cabinet, including a cabinet body 1 and a cabinet door 2, the cabinet door 2 is provided with a handle 4, and the cabinet body 1 is provided with a busbar room, an overvoltage device, a relay instrument room, isolating switch, and circuit breaker room, the cabinet body 1 is provided with inlet and outlet ports, and a sealing strip 3 is provided between the cabinet body 1 and the cabinet door 2. The function of the sealing strip 3 is to seal the cabinet door 2 and the cabinet body 1. The gap of the longer contact area between them is sealed, on the one hand, it prevents the outside dust from entering the cabinet 1, and on the other hand, it also prevents a large amount of gas in the cabinet 1 from leaking from the long gap; the top of the cabinet 1 is equipped with a nitrogen generator machine 5, if the volume of the nitrogen generator 5 is large, the nitrogen generator 5 needs to be placed on one side of the cabinet 1, and the specification of the nitrogen generator 5 needs to be selected according to the container of the switch cabinet, if the nitrogen generator 5 is placed On the top of the cabinet 1, an insulating shock absorber 9 is provided between the nitrogen generator 5 and the cabinet 1. The insulating shock absorber 9 usually uses a rubber pad to avoid vibration in the cabinet 1 when the nitrogen generator 5 is working. The electrical components of the nitrogen generator 5 are connected to a nitrogen storage tank 6, and a check valve 15 is provided between the nitrogen generator 5 and the nitrogen storage tank 6, and the nitrogen storage tank 6 is arranged on the top of the cabinet 1 and is located at the top of the cabinet 1. On the outside, the cabinet body 1 is provided with an air intake pipe 7 connected to the nitrogen storage tank 6, the air intake pipe 7 is located at the top of the cabinet body 1, and an overflow valve 8 is provided on the air intake pipe 7 to prevent the pressure in the cabinet body 1 from being too high , damage the cabinet 1, when the pressure inside the cabinet 1 is higher than the set value, the excess nitrogen can be discharged into the air through the overflow valve 8. The bottom of the cabinet 1 is provided with an air outlet pipe 10. Nitrogen gas enters the cabinet 1 to discharge the air in the cabinet 1, so that the electrical components in the cabinet 1 work in a nitrogen environment. The outlet pipe 10 is connected to a flow regulator The valve 11 can adjust the air output of the air outlet pipe 10 .

The nitrogen generator 5 is connected with a first grounding wire 13, and the bottom of the cabinet 1 is connected with a second grounding wire 14, and the grounding of the cabinet 1 and the nitrogen generator 5 are separately set to prevent the nitrogen generator 5 from interfering with the switch cabinet.

In order to know the nitrogen pressure in the cabinet 1 clearly, a pressure gauge 12 is provided on the gas outlet pipe 10 between the flow regulating valve 11 and the cabinet 1 so that the gas output of the gas outlet pipe 10 can be adjusted through the flow regulating valve 11 .

When the cabinet door 2 is opened and closed again, and the power supply cannot be provided immediately, the nitrogen generator 5 is first turned on, the nitrogen in the nitrogen storage tank 6 enters the cabinet 1, the flow regulating valve 11 is opened, and the air in the cabinet 1 is discharged from the outlet pipe 10 discharge, because the cabinet body 1 also has multiple air leakage points, such as the seal of the sealing strip 3 is not tight, the inlet port and the outlet port, etc., so when the nitrogen intake is determined, the flow regulating valve 11 can be closed, The nitrogen intake amount is balanced with the leakage amount of the cabinet 1 to ensure that the nitrogen pressure in the cabinet 1 is a positive pressure. Under normal working conditions, the cabinet body 1 of the switchgear keeps positive pressure nitrogen all the time. On the one hand, it can effectively prevent the oxidation of electrical components and wires, and prolong the service life of electrical components. On the other hand, due to the cabinet body 1 The positive pressure nitrogen inside is discharged from the leakage point, which can effectively prevent external dust from entering the cabinet body 1, and avoid various dangerous accidents caused by dust.

It should be understood that these examples are only used to illustrate the utility model and are not intended to limit the protection scope of the utility model. In addition, it should also be understood that after reading the technical content of the utility model, those skilled in the art can make various changes, modifications and/or variations to the utility model, and all these equivalent forms also fall within the scope of the appended rights of the application. within the scope of protection defined in the request.

Claims (4)

1. A high-voltage switch cabinet, comprising a cabinet body and a cabinet door, a sealing strip is provided between the cabinet body and the cabinet door, it is characterized in that: the top of the cabinet body is provided with a nitrogen generator, and the nitrogen generator An insulating shock-absorbing pad is provided between the cabinet and the nitrogen generator is connected to a nitrogen storage tank, the nitrogen storage tank is arranged on the top of the cabinet and is located outside the cabinet, on the cabinet An air inlet pipe connected to the nitrogen storage tank is provided, the air inlet pipe is located at the top of the cabinet, and an outlet pipe is provided at the bottom of the cabinet, and the outlet pipe is connected with a flow regulating valve; the system The nitrogen machine is connected with the first ground wire. 2. A high-voltage switchgear as claimed in claim 1, characterized in that: said inlet pipe is provided with an overflow valve. 3. A high-voltage switch cabinet according to claim 1, characterized in that: a pressure gauge is provided on the outlet pipe between the flow regulating valve and the cabinet body. 4. A high-voltage switch cabinet according to claim 1, 2 or 3, characterized in that: the bottom of the cabinet body is connected with a second grounding wire.