CN219304320U

CN219304320U - Switch cabinet

Info

Publication number: CN219304320U
Application number: CN202320745860.2U
Authority: CN
Inventors: 李英鹰; 庄伟冬; 周红; 陆伶颜
Original assignee: SHANGHAI ZHEZHONG ELECTRIC CO LTD
Current assignee: SHANGHAI ZHEZHONG ELECTRIC CO LTD
Priority date: 2023-04-07
Filing date: 2023-04-07
Publication date: 2023-07-04
Anticipated expiration: 2033-04-07

Abstract

The application relates to a switch cabinet, including the sealed outer cabinet body, be located the internal switch cabinet body of sealed outer cabinet, two sets of connecting tube, first end is located the sealed outer cabinet body outside, the second end passes the sealed outer cabinet body in stretch into the internal first regulation pipeline of switch cabinet and establish on the sealed outer cabinet body and with the sealed outer cabinet internal space intercommunication the second regulation pipeline, all there is the gap between the surface of the switch cabinet body and the sealed outer cabinet body, the first end of connecting tube is located the sealed outer cabinet body outside, the second end passes the sealed outer cabinet body in stretching into the switch cabinet body, be equipped with first valve on the first end of first regulation pipeline, be equipped with the second valve on the second regulation pipeline. The switch cabinet disclosed by the application adopts a high-pressure air wrapping mode to reduce leakage of SF6, CCI2F2 and the like, and meanwhile, the high-pressure air can also be used as a buffer zone to absorb overflowed SF6, CCI2F2 and the like, so that the high-pressure air cannot be directly diffused into surrounding air.

Description

Switch cabinet

Technical Field

The application relates to the technical field of electrical equipment, in particular to a switch cabinet.

Background

Early high voltage electrical equipment was typically insulated with high pressure nitrogen (N2) or carbon dioxide (CO 2), but was limited by low dielectric strength and high pressure and has been replaced with sulfur hexafluoride (SF 6) gas. In the high-voltage circuit breaker, SF6 is used as an arc extinguishing medium and an insulating medium, and has excellent performance, so that the low-oil circuit breaker and the compressed air circuit breaker are gradually replaced.

Due to the wide concern over global warming, the use of chamber gases such as SF6, CCI2F2, etc. is also becoming increasingly restricted. Taking a switch cabinet as an example, leakage conditions are easy to occur at gaps, joints and wiring positions of the cabinet body, particularly under a high-pressure environment, the leakage conditions are more obvious,

disclosure of Invention

The utility model provides a cubical switchboard uses the mode of high-pressure air parcel to reduce leaking of SF6 and CCI2F2 etc. and simultaneously high-pressure air can also be regarded as buffer zone absorption and overflowed SF6 and CCI2F2 etc. makes it unable direct diffusion to the air in the surrounding.

The above object of the present application is achieved by the following technical solutions:

the application provides a cubical switchboard, include:

sealing the outer cabinet body;

the switch cabinet body is positioned in the sealed outer cabinet body, and gaps exist between the surface of the switch cabinet body and the sealed outer cabinet body;

the first ends of the two groups of connecting pipelines are positioned outside the sealed outer cabinet body, and the second ends of the connecting pipelines penetrate through the sealed outer cabinet body and extend into the switch cabinet body;

the first end of the first adjusting pipeline is positioned outside the sealed outer cabinet body, and the second end of the first adjusting pipeline penetrates through the sealed outer cabinet body and stretches into the switch cabinet body; a first valve is arranged at the first end of the first adjusting pipeline; and

the second adjusting pipeline is arranged on the sealed outer cabinet body and is communicated with the space in the sealed outer cabinet body, and a second valve is arranged on the second adjusting pipeline.

In one possible implementation manner of the application, the sealed outer cabinet further comprises a first air pressure sensor arranged on the sealed outer cabinet body, and a detection end of the first air pressure sensor is positioned in the sealed outer cabinet body.

In one possible implementation manner of the application, the switch cabinet further comprises a second air pressure sensor arranged on the sealed outer cabinet body, and a detection end of the second air pressure sensor is positioned in the switch cabinet body.

In one possible implementation manner of the application, the control device further comprises a communication valve arranged on the switch cabinet body and a controller communicated with the communication valve;

two ends of the communication valve are respectively communicated with the sealed outer cabinet body and the space in the switch cabinet body;

the controller is positioned on the outer surface of the sealed outer cabinet body.

In one possible implementation of the present application, the communication valve includes:

the two ends of the valve body are respectively communicated with the spaces in the sealed outer cabinet body and the switch cabinet body;

the first control chip set is arranged on the valve body and is electrically connected with the control end of the valve body; and

the first communication chip is electrically connected with the first control chip set.

In one possible implementation of the present application, the controller includes:

the second control chip set is arranged on the sealed outer cabinet body; and

the button and the second communication chip are electrically connected with the second control chip set.

In one possible implementation of the present application, the connecting duct includes a first sub-duct provided on the switchgear body and a second sub-duct provided on the sealed outer cabinet body.

In one possible implementation of the present application, the connection manner of the first sub-pipe and the second sub-pipe is flange connection or plug connection.

Overall, the switch cabinet provided by the application reduces the probability of overflowing of insulating gas in the switch cabinet body by disposing high-pressure air between the sealed outer cabinet body and the switch cabinet body, because the leakage probability of the insulating gas can be greatly reduced when the internal pressure and the external pressure of the switch cabinet body are consistent.

Drawings

Fig. 1 is a schematic diagram of the external appearance of a switch cabinet provided in the present application.

Fig. 2 is an internal schematic diagram of a switchgear provided herein.

Fig. 3 is a schematic block diagram of a communication valve provided in the present application.

Fig. 4 is a schematic block diagram of a controller provided in the present application.

Fig. 5 is a schematic view of a connection pipeline connected with a sealed outer cabinet and a switch cabinet.

In the figure, 1, a sealed outer cabinet body, 2, a switch cabinet body, 3, a connecting pipeline, 4, a first adjusting pipeline, 41, a first valve, 5, a second adjusting pipeline, 51, a second valve, 31, a first sub-pipeline, 32, a second sub-pipeline, 61, a first air pressure sensor, 62, a second air pressure sensor, 63, a communication valve, 64, a controller, 631, a valve body, 632, a first control chip set, 633, a first communication chip, 641, a second control chip set, 642, a button, 643 and a second communication chip.

Detailed Description

The technical solutions in the present application are described in further detail below with reference to the accompanying drawings.

Please refer to fig. 1, for a switch cabinet disclosed in the present application, the switch cabinet is composed of a sealed outer cabinet body 1, a switch cabinet body 2, a connecting pipe 3, a first adjusting pipe 4, a second adjusting pipe 5 and the like, the switch cabinet body 2 is located in the sealed outer cabinet body 1, gaps are formed between the surface of the switch cabinet body 2 and the sealed outer cabinet body 1, high-pressure air is filled in the gaps, and insulating gas (SF 6, CCI2F2 and the like) is filled in the switch cabinet body 2.

The number of the connecting pipelines 3 is two, the number of the connecting pipelines 3 in each group can be one or a plurality, the first ends of the connecting pipelines 3 are positioned outside the sealed outer cabinet body 1, and the second ends of the connecting pipelines penetrate through the sealed outer cabinet body 1 and extend into the switch cabinet body 2.

The connecting pipeline 3 is used for communicating the space in the switch cabinet body 2 with the space outside the sealed outer cabinet body 1 for wire inlet and outlet. After the deployment of the access line is completed, the inside of the connecting pipeline 3 is sealed by resin (epoxy resin, polyurethane resin and the like).

The first end of the first adjusting pipeline 4 is positioned outside the sealed outer cabinet body 1, and the second end of the first adjusting pipeline penetrates through the sealed outer cabinet body 1 and stretches into the switch cabinet body 2, so that insulating gas (SF 6, CCI2F2 and the like) is injected into the switch cabinet body 2. A first valve 41 is also installed on the first end of the first regulating pipeline 4, and the first valve 41 is used for connecting injection equipment when insulating gas (SF 6, CCI2F2 and the like) is injected into the switch cabinet body 2; the first valve 41 is used for connecting with air pressure detecting equipment during daily detection and maintenance; the first valve 41 is used to connect the air reservoir during venting.

The second adjusting pipeline 5 is arranged on the sealed outer cabinet body 1 and is communicated with the space in the sealed outer cabinet body 1, the second adjusting pipeline 5 is provided with a second valve 51, and when air is injected into the sealed outer cabinet body 1, the second valve 51 is used for connecting injection equipment; the second valve 51 is used for connecting with air pressure detection equipment or sampling equipment during daily detection and maintenance; the second valve 51 is used to connect the air reservoir during the exhaust.

Overall, the switch cabinet provided by the application reduces the probability of the overflow of the insulating gas in the switch cabinet body 2 by deploying high-pressure air between the sealed outer cabinet body 1 and the switch cabinet body 2, because the leakage probability of the insulating gas can be greatly reduced when the internal pressure and the external pressure of the switch cabinet body 2 are consistent.

Even if a slight leakage problem occurs, this portion of the leaked insulating gas may enter into the sealed outer cabinet 1 instead of the space outside the sealed outer cabinet 1. In the daily inspection and maintenance process, it is also possible to determine whether leakage of the insulating gas in the switch cabinet 2 has occurred by means of concentration detection (sealing of the gas sample in the outer cabinet 1).

Referring to fig. 2, in some examples, a first air pressure sensor 61 is added to the sealed outer cabinet 1, and a detection end of the first air pressure sensor 61 is located in the sealed outer cabinet 1 and is used for detecting air pressure in the sealed outer cabinet 1 to assist a worker in determining whether the air pressure in the sealed outer cabinet 1 meets a requirement.

Referring to fig. 2, in other examples, a second air pressure sensor 62 is further installed on the sealed outer cabinet 1, and a detection end of the second air pressure sensor 62 is located in the switch cabinet 2 and is used for detecting air pressure in the switch cabinet 2 to assist a worker in determining whether the air pressure in the switch cabinet 2 meets the requirement.

When the first air pressure sensor 61 and the second air pressure sensor 62 are used simultaneously, the staff can perform pressure adjustment and leakage judgment through the two air pressure sensors, for example, the air pressure in the sealed outer cabinet 1 should be slightly higher than the insulating air pressure in the switch cabinet 2 during pressurization and daily inspection.

Referring to fig. 2, in some examples, a communication valve 63 and a controller 64 communicating with the communication valve 63 are additionally installed on the switch cabinet 2, two ends of the communication valve 63 are respectively communicated with the sealed outer cabinet 1 and the space in the switch cabinet 2, and the controller 64 is located on the outer surface of the sealed outer cabinet 1.

The communication valve 63 and the controller 64 function to allow air in the sealed outer cabinet 1 to enter the switch cabinet 2 when exhausting. It should be appreciated that during the exhaust process, the insulating gas in the switchgear body 2 may flow into the gas storage tank, and at this time, the pressure in the switchgear body 2 may gradually decrease. In order to ensure the normal operation of the exhaust process, the air in the sealed outer cabinet body 1 is required to be used as the supplement to enter the switch cabinet body 2, so that the insulating gas in the switch cabinet body 2 can be completely exhausted.

The above process is realized by the communication valve 63 and the controller 64, and the controller 64 is pressed down to change the communication valve 63 from the closed state to the open state during the exhaust.

Referring to fig. 3, the arrows indicate the signal flow direction, the communication valve 63 is composed of a valve body 631, a first control chipset 632 and a first communication chip 633, the first control chipset 632 is disposed on the valve body 631 and electrically connected to the control end of the valve body 631, and the first communication chip 633 is electrically connected to the first control chipset 632.

The first communication chip 633 is configured to receive an instruction issued by the controller 64, and then send the instruction to the first control chipset 632.

In some possible implementations, the first communication chip 633 uses a bluetooth module, the first control chipset 632 uses a single chip microcomputer (86C 51 series), and the control signal sent by the first control chipset 632 is received by an encoder on the valve body 631 and then sent to an execution unit (motor) in the valve body 631.

Referring to fig. 4, the arrow in the drawing indicates the signal flow direction, the controller 64 is composed of a second control chipset 641, a button 642 and a second communication chip 643, the second control chipset 641 is located on the sealed outer cabinet 1, the button 642 and the second communication chip 643 are electrically connected with the second control chipset 641, and after the signal (high-low level) generated by the button 642 is received by the second control chipset 641, the second control chipset 641 transmits a control instruction to the first communication chip 633 through the second communication chip 643.

In some possible implementations, the second communication chip 643 uses a bluetooth module and the second control chipset 641 uses a single chip microcomputer (86C 51 series).

Referring to fig. 5, in some examples, the connecting pipe 3 is divided into two parts, namely a first sub-pipe 31 and a second sub-pipe 32, the first sub-pipe 31 is located on the switch cabinet 2, and the second sub-pipe 32 is located on the sealed outer cabinet 1. The first sub-pipe 31 and the second sub-pipe 32 are connected in a flange connection or plug connection mode.

The connecting duct 3 of this construction has the advantage of being separable, the first sub-duct 31 and the corresponding second sub-duct 32 being connectable and disconnectable when the switch cabinet 2 is installed and removed.

The embodiments of the present utility model are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in this way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims

1. A switchgear comprising:

sealing the outer cabinet body (1);

the switch cabinet body (2) is positioned in the sealed outer cabinet body (1), and gaps exist between the surface of the switch cabinet body (2) and the sealed outer cabinet body (1);

the first ends of the connecting pipelines (3) are positioned outside the sealed outer cabinet body (1), and the second ends of the connecting pipelines penetrate through the sealed outer cabinet body (1) and extend into the switch cabinet body (2);

the first end of the first adjusting pipeline (4) is positioned outside the sealed outer cabinet body (1), the second end of the first adjusting pipeline (4) penetrates through the sealed outer cabinet body (1) and stretches into the switch cabinet body (2), and a first valve (41) is arranged at the first end of the first adjusting pipeline (4); and

the second adjusting pipeline (5) is arranged on the sealed outer cabinet body (1) and is communicated with the space in the sealed outer cabinet body (1), and a second valve (51) is arranged on the second adjusting pipeline (5).

2. The switch cabinet according to claim 1, further comprising a first air pressure sensor (61) provided on the sealed outer cabinet (1), the detection end of the first air pressure sensor (61) being located in the sealed outer cabinet (1).

3. The switch cabinet according to claim 2, further comprising a second air pressure sensor (62) provided on the sealed outer cabinet body (1), wherein a detection end of the second air pressure sensor (62) is located in the switch cabinet body (2).

4. A switch cabinet according to any one of claims 1 to 3, further comprising a communication valve (63) provided on the switch cabinet body (2) and a controller (64) in communication with the communication valve (63);

two ends of the communication valve (63) are respectively communicated with the spaces in the sealed outer cabinet body (1) and the switch cabinet body (2);

the controller (64) is positioned on the outer surface of the sealed outer cabinet body (1).

5. The switchgear according to claim 4, characterized in that the communication valve (63) comprises:

the two ends of the valve body (631) are respectively communicated with the spaces in the sealed outer cabinet body (1) and the switch cabinet body (2);

a first control chip set (632) arranged on the valve body (631) and electrically connected with the control end of the valve body (631); and

the first communication chip (633) is electrically connected with the first control chip set (632).

6. The switchgear according to claim 5, characterized in that the controller (64) comprises:

a second control chip set (641) arranged on the sealed outer cabinet body (1); and

the button (642) and the second communication chip (643) are electrically connected to the second control chipset (641).

7. A switchgear according to claim 1, characterized in that the connecting duct (3) comprises a first sub-duct (31) provided on the switchgear body (2) and a second sub-duct (32) provided on the sealed outer cabinet body (1).

8. The switchgear according to claim 7, characterized in that the first sub-pipe (31) and the second sub-pipe (32) are connected in a flanged connection or in a plug connection.