Low-voltage capacitance compensation cabinet

Abstract

The utility model discloses a low-voltage capacitance compensation cabinet, which relates to the technical field of power equipment and comprises a cabinet body, the top of the cabinet body is sequentially provided with a sucking pump, a carbon dioxide storage cylinder and a cooling box, the sucking pump is communicated with the carbon dioxide storage cylinder, and the carbon dioxide storage cylinder is communicated with the cooling box. A three-way pipe fitting is arranged at one end of the air extracting pump, an air outlet pipe is arranged on one side of the cabinet body, a first valve is arranged between the air outlet pipe and the three-way pipe fitting, a cooling channel is formed in one side of the cabinet body, a second valve is arranged between the cooling channel and the three-way pipe fitting, and a cooling pipe communicated with the cooling channel is arranged in the cooling box. A smoke sensor and a controller are arranged in the cabinet body. According to the low-voltage capacitance compensation cabinet, whether fire breaks out inside the cabinet body or not is monitored through the smoke sensor, when fire breaks out, the controller controls the first valve to be opened and the second valve to be closed, the air pump is started to pump carbon dioxide into the cabinet body, and the cabinet body is filled with carbon dioxide to achieve the fire extinguishing effect.

Description

Technical Field

[0001] The utility model relates to the technical field of electric power equipment, in particular to a low-voltage capacitor compensation cabinet. Background Art

[0002] Most of the load types in the power system are inductive loads. In addition, power users generally use power electronic equipment, which makes the power factor of the power grid low. The low power factor reduces the equipment utilization rate, increases the power supply investment, damages the voltage quality, reduces the service life of the equipment, and greatly increases the line loss. In order to improve the energy waste and unfavorable factors of power supply production caused by the low power factor of the power grid, the capacitor compensation cabinet is generally used to use the powerless compensation switching device as a control and protection device, and the low-voltage capacitor is compensated on the large user bus for power compensation, which can effectively improve the power factor of the power grid, save energy, and improve the quality of power supply.

[0003] For example, a Chinese patent with publication number CN206697806U and titled "A Capacitor Compensation Cabinet" includes a cabinet, characterized in that: the cabinet is divided into an upper cabinet and a lower cabinet, wherein an ammeter, a voltmeter, a reactive power meter, a power factor meter and a plurality of circuit indicator lights are arranged side by side in the upper cabinet, a cooling water tank is arranged between the upper cabinet and the lower cabinet, a circulating water pump is installed in the cooling water tank, and the bottom end of the cooling water tank is connected to the lower cabinet through a sluice gate, and a curved water cooling pipe is arranged in the lower cabinet, and the two ends of the water cooling pipe are respectively connected to the circulating water pump outlet and the cooling water tank; the lower cabinet is also provided with circuit breakers, isolating switches, thermal relays, capacitors, reactors, terminal blocks and power factor automatic compensation control devices that are evenly distributed beside the water cooling pipe and arranged close to the water cooling pipe; a smoke sensor is also arranged in the lower cabinet, and a controller is arranged in the upper cabinet, and the controller is electrically connected to the smoke sensor, the circulating water pump and the sluice gate respectively.

[0004] Although the capacitor compensation cabinet in the above patent is practical and convenient, it also has shortcomings. If the capacitor compensation cabinet fails to cut off the power in time and the cooling water is conductive, the cooling water will enter the lower cabinet and easily cause electric shock, which will reduce the insulation performance of the equipment and even cause the equipment to explode, endangering personal safety. Utility Model Content

[0005] The purpose of the utility model is to provide a low-voltage capacitor compensation cabinet to solve the deficiencies in the above-mentioned prior art.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: the low-voltage capacitor compensation cabinet comprises a cabinet body and a cabinet door covering one side of the cabinet body, the top of the cabinet body is provided with an exhaust pump, a carbon dioxide storage cylinder and a cooling box in sequence, the exhaust pump is communicated with the carbon dioxide storage cylinder through a first connecting pipe, the carbon dioxide storage cylinder is communicated with the cooling box through a second connecting pipe, a three-way pipe fitting is provided at one end of the exhaust pump away from the first connecting pipe, an air outlet pipe is provided inside one side of the cabinet body, the air outlet pipe is communicated with the three-way pipe fitting, and a first valve is provided between the air outlet pipe and the three-way pipe fitting, a cooling channel is opened inside the side of the cabinet body away from the cabinet door, the cooling channel is communicated with the three-way pipe fitting, and a second valve is provided between the cooling channel and the three-way pipe fitting, a cooling pipe communicated with the cooling channel is provided in the cooling box, and a smoke sensor and a controller are provided in the cabinet body.

[0007] Furthermore, a heat dissipation hole is opened on the top of the cabinet, and a heat dissipation filter plate is clamped in the heat dissipation hole. The heat dissipation filter plate includes a frame, a plurality of connecting columns and two clamping blocks. The two clamping blocks are symmetrically arranged on both sides of the frame, and each connecting column is equidistantly arranged in the frame. Two clamping slots are symmetrically opened on both sides of the heat dissipation hole, and the two clamping blocks are clamped and matched with the two clamping slots in a one-to-one correspondence.

[0008] Furthermore, the cooling channel is arranged in an S shape, and the cooling channel includes a plurality of straight cooling channels, each of the straight cooling channels is parallel to each other and is arranged at an equal distance, and a bent cooling channel is opened between two adjacent straight cooling channels.

[0009] Furthermore, the air outlet of the air outlet pipe is provided with a nozzle, and the nozzle is trumpet-shaped.

[0010] Furthermore, an alarm device is provided on the top of the cabinet, and the alarm device is electrically connected to the controller.

[0011] Furthermore, the first valve, the second valve, the smoke sensor and the air pump are all electrically connected to the controller.

[0012] Furthermore, a through hole for the cooling pipe to pass through is opened at the bottom of the cooling box, and a sealing ring is provided between the inner wall of the through hole and the peripheral side surface of the cooling pipe.

[0013] Compared with the prior art, the utility model provides the following beneficial effects: the low-voltage capacitor compensation cabinet uses carbon dioxide as a cooling gas to exchange heat for the cabinet, and the carbon dioxide gas after heat exchange is then cooled by a cooling box to achieve recycling, and a smoke sensor is used to monitor whether a fire occurs inside the cabinet. When a fire occurs, the smoke sensor transmits a signal to the controller, and the controller controls the first valve to open and the second valve to close, and starts the vacuum pump to pump carbon dioxide into the cabinet. The cabinet is filled with carbon dioxide to quickly achieve a fire extinguishing effect, thereby avoiding water fire extinguishing, causing electric shock, reducing the insulation performance of the equipment, causing the equipment to explode, and endangering personal safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0015] Figure 1 The overall structural diagram provided for the embodiment of the utility model;

[0016] Figure 2 for Figure 1 The enlarged view of point D in the middle;

[0017] Figure 3 A top view of the overall structure provided for an embodiment of the utility model;

[0018] Figure 4 for Figure 3 Sectional view at AA in the middle;

[0019] Figure 5 for Figure 4 The enlarged view of point B in the middle;

[0020] Figure 6 for Figure 3 Cross-sectional view at CC.

[0021] Explanation of the accompanying drawings: 1. cabinet body; 2. cabinet door; 3. handle; 4. cooling box; 5. carbon dioxide storage cylinder; 6. vacuum pump; 7. alarm device; 8. three-way pipe fitting; 9. first valve; 10. second valve; 11. exhaust pipe; 12. cooling channel; 13. cooling pipe; 14. second connecting pipe; 15. first connecting pipe; 16. frame; 17. connecting column; 18. block; 19. smoke sensor; 20. nozzle; 21. sealing ring. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0023] See also Figure 1-6 A technical solution provided by an embodiment of the utility model: the low-voltage capacitor compensation cabinet includes a cabinet body 1 and a cabinet door 2 covering one side of the cabinet body 1, and an air pump 6, a carbon dioxide storage cylinder 5 and a cooling box 4 are arranged on the top of the cabinet body 1 in sequence, the air pump 6 is communicated with the carbon dioxide storage cylinder 5 through a first connecting pipe 15, and the carbon dioxide storage cylinder 5 is communicated with the cooling box 4 through a second connecting pipe 14, and a three-way pipe fitting 8 is arranged at one end of the air pump 6 away from the first connecting pipe 15, an air outlet pipe 11 is arranged inside one side of the cabinet body 1, the air outlet pipe 11 is communicated with the three-way pipe fitting 8, and a first valve 9 is arranged between the air outlet pipe 11 and the three-way pipe fitting 8, a cooling channel 12 is opened inside the side of the cabinet body 1 away from the cabinet door 2, the cooling channel 12 is communicated with the three-way pipe fitting 8, and the cooling channel 1 2 and the three-way pipe fitting 8, a second valve 10 is provided between the cooling box 4 and the three-way pipe fitting 8, a cooling pipe 13 communicating with the cooling channel 12 is provided in the cooling box 4, a smoke sensor 19 and a controller are provided in the cabinet 1, specifically, a handle 3 is provided on the cabinet door 2, the first valve 9, the second valve 10, the smoke sensor 19 and the vacuum pump 6 are all electrically connected to the controller, and the smoke sensor 19 is used to monitor whether there is a fire inside the cabinet 1. When a fire occurs, the smoke sensor 19 transmits a signal to the controller, and the controller controls the first valve 9 to open and the second valve 10 to close, and starts the vacuum pump 6 to pump carbon dioxide into the cabinet 1. The cabinet 1 is filled with carbon dioxide to quickly achieve a fire extinguishing effect, thereby avoiding water fire extinguishing, causing electric shock, reducing the insulation performance of the equipment, causing the equipment to explode, and endangering personal safety.

[0024] As a preferred technical solution, a heat dissipation hole is provided on the top of the cabinet 1, and a heat dissipation filter plate is clamped in the heat dissipation hole. The heat dissipation filter plate includes a frame 16, a plurality of connecting columns 17 and two clamping blocks 18. The two clamping blocks 18 are symmetrically arranged on both sides of the frame 16, and each connecting column 17 is arranged in the frame 16 at an equal distance. Two card slots are symmetrically provided on both sides of the heat dissipation hole, and the two card blocks 18 are clamped and matched with the two card slots in a one-to-one correspondence. Specifically, the heat in the cabinet 1 can flow to the outside through the heat dissipation filter plate, and a part of the dust will be blocked by the heat dissipation filter plate to avoid excessive dust inside the cabinet 1 and affect the operation of the equipment. The setting of the card block 18 and the card slot is more convenient for removing the heat dissipation filter plate for cleaning, avoiding excessive dust blockage, causing heat accumulation inside the cabinet 1, temperature rise, and easy fire. In the event of a fire, carbon dioxide flows in from the bottom wall inside the cabinet 1. Since the density of carbon dioxide is heavier than that of air, the air inside the cabinet 1 is discharged through the heat dissipation filter plate by the upward air exhaust method, so that the inside of the cabinet 1 is quickly filled with carbon dioxide.

[0025] As a preferred technical solution, the cooling channel 12 is arranged in an S shape, and the cooling channel 12 includes a plurality of straight cooling channels 12. The straight cooling channels 12 are parallel to each other and are arranged at equal distances. A bent cooling channel 12 is opened between two adjacent straight cooling channels 12. Specifically, the bent cooling channel 12 is used to connect the head and tail end points of the straight cooling channels 12, so that a complete passage is formed between the straight cooling channels 12, ensuring that carbon dioxide can flow in the cooling channel 12. The cooling channel 12 covers the heat exchange area on one side of the cabinet 1. The S-shaped setting can increase its cooling area and make the temperature more uniform during heat exchange.

[0026] As a preferred technical solution, a nozzle 20 is provided at the outlet of the outlet pipe 11. The nozzle 20 is trumpet-shaped. Specifically, the trumpet-shaped setting is to accelerate the release speed of carbon dioxide and expand the release area so that the carbon dioxide quickly fills the entire cabinet 1.

[0027] As a preferred technical solution, an alarm device 7 is provided on the top of the cabinet 1, and the alarm device 7 is electrically connected to the controller. Specifically, after a fire occurs, the controller receives a signal from the smoke sensor 19, and the controller adjusts the alarm device 7 to work. The alarm device 7 warns external personnel, allowing the personnel to respond quickly.

[0028] As a preferred technical solution, a through hole is provided at the bottom of the cooling box 4 for the cooling pipe 13 to pass through, and a sealing ring 21 is provided between the inner wall of the through hole and the side surface of the cooling pipe 13. Specifically, the sealing ring 21 is used to increase the sealing between the cooling box 4 and the cooling channel 12 to prevent the cooling water in the cooling box 4 from leaking into the cooling channel 12, thereby reducing the heat exchange area of ​​the carbon dioxide and reducing the heat dissipation efficiency. The cooling pipe 13 is arranged in an S shape, which can increase the cooling area and facilitate the rapid cooling of the carbon dioxide gas in the cooling pipe 13.

[0029] Working principle: The low-voltage capacitor compensation cabinet uses carbon dioxide as a cooling gas to flow through the cooling channel 12 to exchange heat with the cabinet 1. The carbon dioxide gas after heat exchange is then cooled by the cooling box 4 to achieve recycling. The smoke sensor 19 monitors whether there is a fire inside the cabinet 1. When a fire occurs, the smoke sensor 19 transmits a signal to the controller. The controller controls the first valve 9 to open and the second valve 10 to close, and starts the vacuum pump 6 to pump carbon dioxide into the cabinet 1. The cabinet 1 is filled with carbon dioxide to quickly achieve a fire extinguishing effect, avoid water fire extinguishing, cause electric shock, reduce the insulation performance of the equipment, cause equipment explosion, and endanger personal safety.

[0030] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A low voltage capacitor compensation cabinet, characterized in that: The cabinet comprises a cabinet body (1) and a cabinet door (2) covering one side of the cabinet body (1); an air extraction pump (6), a carbon dioxide storage cylinder (5) and a cooling box (4) are sequentially arranged on the top of the cabinet body (1); the air extraction pump (6) is connected to the carbon dioxide storage cylinder (5) via a first connecting pipe (15); the carbon dioxide storage cylinder (5) is connected to the cooling box (4) via a second connecting pipe (14); a three-way pipe fitting (8) is arranged at one end of the air extraction pump (6) away from the first connecting pipe (15); an air outlet pipe (11) is arranged inside one side of the cabinet body (1); The air outlet pipe (11) is in communication with the three-way pipe fitting (8), and a first valve (9) is provided between the air outlet pipe (11) and the three-way pipe fitting (8); a cooling channel (12) is provided inside the cabinet body (1) at a side away from the cabinet door (2); the cooling channel (12) is in communication with the three-way pipe fitting (8), and a second valve (10) is provided between the cooling channel (12) and the three-way pipe fitting (8); a cooling pipe (13) in communication with the cooling channel (12) is provided inside the cooling box (4); and a smoke sensor (19) and a controller are provided inside the cabinet body (1).

2. A low-voltage capacitor compensation cabinet according to claim 1, characterized in that: A heat dissipation hole is provided on the top of the cabinet (1), a heat dissipation filter plate is clamped in the heat dissipation hole, the heat dissipation filter plate comprises a frame (16), a plurality of connecting columns (17) and two clamping blocks (18), the two clamping blocks (18) are symmetrically arranged on both sides of the frame (16), the connecting columns (17) are arranged in the frame (16) at an equal distance, two clamping slots are symmetrically provided on both sides of the heat dissipation hole, and the two clamping blocks (18) are clamped and matched with the two clamping slots in a one-to-one correspondence.

3. A low-voltage capacitor compensation cabinet according to claim 1, characterized in that: The cooling channel (12) is arranged in an S shape, and comprises a plurality of straight cooling channels (12), the straight cooling channels (12) being parallel to each other and arranged at equal distances, and a bent cooling channel (12) is provided between two adjacent straight cooling channels (12).

4. A low-voltage capacitor compensation cabinet according to claim 1, characterized in that: The air outlet of the air outlet pipe (11) is provided with a nozzle (20), and the nozzle (20) is trumpet-shaped.

5. A low-voltage capacitor compensation cabinet according to claim 1, characterized in that: An alarm device (7) is provided on the top of the cabinet (1), and the alarm device (7) is electrically connected to the controller.

6. A low-voltage capacitor compensation cabinet according to claim 1, characterized in that: The first valve (9), the second valve (10), the smoke sensor (19) and the air pump (6) are all electrically connected to the controller.

7. A low-voltage capacitor compensation cabinet according to claim 1, characterized in that: A through hole for the cooling pipe (13) to pass through is provided at the bottom of the cooling box (4), and a sealing ring (21) is provided between the inner wall of the through hole and the peripheral side surface of the cooling pipe (13).

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