Explosion-proof ring main unit with pressure reduction box

Abstract

The utility model discloses an explosion-proof type ring main unit with a pressure reduction box, which comprises a ring main unit body and a pressure reduction box body, the pressure reduction box body is fixedly connected inside the ring main unit body, a plurality of temperature sensors are arranged at the top end of the pressure reduction box body, a pressure detector is arranged at the top end of the pressure reduction box body, and the pressure reduction box body is connected with the pressure reduction box body. One end of the pressure detector is communicated with the interior of the pressure reduction box body, a pressure reduction pipe is fixedly connected to the surface of the pressure reduction box body, the interior of the pressure reduction pipe is communicated with the interior of the pressure reduction box body, a first control valve is arranged on the surface of the pressure reduction pipe, and an exhaust pipe is fixedly connected to one end of the pressure reduction box body. The controller can send an electric signal to the second control valve to close the second control valve, then send an electric signal to the second control valve to open the second control valve and send an electric signal to the air pump, and the air pump is started to vacuumize the pressure reduction box body again through the exhaust pipe, so that repeated use is achieved, and the cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of ring main units, and particularly relates to an explosion-proof ring main unit with a decompression box. Background Art

[0002] A ring main unit is a set of high-voltage switchgear installed in a steel plate metal cabinet or made into a prefabricated sectionalized ring network power supply unit. Its core part uses a load switch and a fuse, and has the advantages of simple structure, small volume, low price, improving power supply parameters and performance, and power supply safety. When the existing ring main unit is in use, an internal arcing fault may occur, and it is necessary to strengthen the explosion-proof and safety performance of the ring main unit.

[0003] For example, in the patent with the patent number 202122914900.5 and the patent name of an explosion-proof ring main unit with a decompression box, when the ring main unit body is in operation, if an internal arcing fault occurs, if the easily broken cover plate uses a brittle material, the high pressure generated inside the ring main unit body will cause the easily broken cover plate to break immediately and open the box body. If the easily broken cover plate uses an easily fusible alloy material, the high temperature generated inside the ring main unit body will cause the easily broken cover plate to melt immediately and open the box body. The box body can effectively absorb part of the pressure inside the ring main unit body, greatly reducing the damage to the ring main unit body caused by the internal arcing fault.

[0004] However, in the process of using the above solution, after the easily broken cover plate is broken, it needs to be replaced before it can be reused, increasing the use cost. Content of the Utility Model

[0005] In order to solve the problems existing in the prior art, the utility model provides an explosion-proof ring main unit with a decompression box. After inspection and no damage after use, an electric signal can be sent to the second control valve through the controller to close it, and then an electric signal can be sent to the second control valve through the controller to open it, and then an electric signal can be sent to the air pump to start the air pump to re-vacuumize the decompression box body through the suction pipe, so as to achieve repeated use and reduce costs.

[0006] To achieve the above object, the present utility model provides the following technical solution: An explosion-proof ring main unit with a pressure reduction box, comprising a ring main unit body and a pressure reduction box body. The pressure reduction box body is fixedly connected inside the ring main unit body. A plurality of temperature sensors are provided at the top of the pressure reduction box body. A pressure detector is provided at the top of the pressure reduction box body. One end of the pressure detector is communicated with the inside of the pressure reduction box body. A pressure reduction pipe is fixedly connected to the surface of the pressure reduction box body, and the inside of the pressure reduction pipe is communicated with the inside of the pressure reduction box body. A first control valve is provided on the surface of the pressure reduction pipe. One end of the pressure reduction box body is fixedly connected with an air extraction pipe. An air pump is fixedly connected to the surface of the ring main unit body. One end of the air extraction pipe fixedly penetrates and extends to the outside of the ring main unit body. One end of the air extraction pipe is fixedly connected to the air inlet end of the air pump. Both ends of the air extraction pipe are communicated with the inside of the pressure reduction box body and the air pump respectively. A second control valve is provided on the air extraction pipe.

[0007] Further, a controller is provided on the surface of the pressure reduction box body.

[0008] Further, the controller is electrically connected to the pressure detector, the temperature sensor, the first control valve, the air pump and the second control valve respectively through wires.

[0009] Compared with the prior art, the beneficial effects of the present utility model are:

[0010] 1. After detection without damage after use, an electrical signal can be sent to the second control valve through the controller to close it, and then an electrical signal can be sent to the second control valve through the controller to open it, and then an electrical signal is sent to the air pump to start the air pump to re-vacuum the pressure reduction box through the air extraction pipe, so as to achieve repeated use and reduce costs.

[0011] 2. When an arc fault occurs inside the ring main unit body, it will be sensed by the temperature sensor and an electrical signal will be sent to the controller. Then the controller sends an electrical signal to the first control valve. After the first control valve is opened, part of the pressure inside the ring main unit body can be absorbed through the vacuum inside the pressure reduction box body, reducing the damage to the ring main unit body caused by the internal arc fault. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0013] Figure 2 It is a cross-sectional view of the overall structure of the present utility model.

[0014] In the figure: 1. Ring main unit body; 2. Pressure reduction box body; 3. Pressure detector; 4. Temperature sensor; 5. Controller; 6. Pressure reduction pipe; 7. First control valve; 8. Air extraction pipe; 9. Air pump; 10. Second control valve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0016] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model. Embodiment

[0017] See the attached Figure 1-2 As shown, an explosion-proof ring main unit with a pressure reducing box includes a ring main unit body 1 and a pressure reducing box body 2. The pressure reducing box body 2 is fixedly connected inside the ring main unit body 1. A plurality of temperature sensors 4 are provided at the top of the pressure reducing box body 2. A pressure detector 3 is provided at the top of the pressure reducing box body 2. One end of the pressure detector 3 is communicated with the inside of the pressure reducing box body 2. A pressure reducing pipe 6 is fixedly connected to the surface of the pressure reducing box body 2, and the inside of the pressure reducing pipe 6 is communicated with the inside of the pressure reducing box body 2. A first control valve 7 is provided on the surface of the pressure reducing pipe 6. One end of the pressure reducing box body 2 is fixedly connected to an air extraction pipe 8. An air pump 9 is fixedly connected to the surface of the ring main unit body 1. One end of the air extraction pipe 8 fixedly penetrates and extends to the outside of the ring main unit body 1, and one end of the air extraction pipe 8 is fixedly connected to the air inlet end of the air pump 9. Both ends of the air extraction pipe 8 are communicated with the inside of the pressure reducing box body 2 and the air pump 9 respectively. A second control valve 10 is provided on the air extraction pipe 8.

[0018] A controller 5 is provided on the surface of the pressure reducing box body 2.

[0019] The controller 5 is electrically connected to the pressure detector 3, the temperature sensor 4, the first control valve 7, the air pump 9 and the second control valve 10 through wires respectively.

[0020] Working principle: The controller 5 is a PLC controller 5, which is programmable control in the prior art. The pressure inside the pressure reduction box body 2 can be detected by the pressure detector 3. When an arc fault occurs inside the ring main unit 1, it will be sensed by the temperature sensor 4 and an electrical signal will be sent to the controller 5. Then the controller 5 sends an electrical signal to the first control valve 7. After the first control valve 7 is opened, part of the pressure inside the ring main unit 1 can be absorbed through the vacuum inside the pressure reduction box body 2, reducing the damage of the internal arc fault to the ring main unit 1. After use, if no damage is detected, the controller 5 can send an electrical signal to the second control valve 10 to close it, and then send an electrical signal to the second control valve 10 to open it, and then send an electrical signal to the air pump 9 to start the air pump 9 to re-vacuumize the pressure reduction box body through the suction pipe 8, so as to achieve repeated use and reduce costs.

[0021] The foregoing has shown and described the basic principles, main features and advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention, and any reference signs in the claims should not be regarded as limiting the claims involved.

[0022] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An explosion-proof ring main unit with a pressure reducing box, comprising a ring main unit body (1) and a pressure reducing box (2), characterized in that: The pressure reducing box (2) is fixedly connected to the inside of the ring network cabinet body (1); a plurality of temperature sensors (4) are provided at the top of the pressure reducing box (2); a pressure detector (3) is provided at the top of the pressure reducing box (2); one end of the pressure detector (3) is connected to the inside of the pressure reducing box (2); a pressure reducing pipe (6) is fixedly connected to the surface of the pressure reducing box (2); the inside of the pressure reducing pipe (6) is connected to the inside of the pressure reducing box (2); a first control valve (7) is provided on the surface of the pressure reducing pipe (6); one end of the pressure reducing box (2) is fixedly connected to an exhaust pipe (8); the surface of the ring network cabinet body (1) is fixedly connected to an air pump (9); one end of the exhaust pipe (8) is fixedly passed through and extends to the outside of the ring network cabinet body (1); one end of the exhaust pipe (8) is fixedly connected to the air inlet end of the air pump (9); both ends of the exhaust pipe (8) are respectively connected to the inside of the air pumps (9) of the pressure reducing box (2); and a second control valve (10) is provided on the exhaust pipe (8).

2. The explosion-proof ring main unit with a decompression box according to claim 1, characterized in that: A controller (5) is provided on the surface of the decompression box (2).

3. The explosion-proof ring main unit with a decompression box according to claim 2, characterized in that: The controller (5) is electrically connected to the pressure detector (3), the temperature sensor (4), the first control valve (7), the air pump (9) and the second control valve (10) respectively through wires.

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