Ventilation device for inducing and removing SF6 leakage gas of high-voltage electrical equipment

Abstract

The utility model provides an induced removal ventilation device for SF6 leakage gas of high-voltage electrical equipment. The induced removal ventilation device comprises a plurality of induced fans and a plurality of detection units used for detecting the SF6 leakage gas, the detection units are installed below a high-voltage electrical equipment area at intervals. The induction fan is arranged between the detection unit and the high-voltage electrical equipment area, the induction fan is movably mounted on an induction fan ground guide rail, a plurality of air outlet nozzles capable of adjusting the air outlet angle are arranged on the induction fan, and the air outlet of the air outlet nozzles of the induction fan covers the high-voltage electrical equipment area. According to the utility model, the SF6 leakage gas in the high-voltage electrical equipment area is responded in time, the ventilation effectiveness of the high-voltage electrical equipment area is effectively improved, the concentration of the leaked SF6 gas is rapidly reduced, the processing difficulty and emergency processing time of the SF6 gas leakage are greatly reduced, and the safe entering time of the high-voltage electrical equipment area is greatly shortened.

Description

Technical Field

[0001] This utility model belongs to the field of electromechanical engineering technology and relates to a device for detecting and collecting leaked gas. Background Technology

[0002] With the continuous development of modern power systems, high-voltage electrical equipment such as gas-insulated switchgear (GIS) and gas-insulated transmission lines (GIL) have been widely used in power, communications, and other fields. These devices play a crucial role in important locations such as substations and power plants due to their high efficiency, compact design, and ease of maintenance. SF6 (sulfur hexafluoride) gas is a colorless and odorless gas commonly used in high-voltage electrical equipment such as GIS and GIL, possessing strong insulation and stability. During long-term use, SF6 gas leakage may occur in high-voltage electrical equipment such as GIS and GIL due to changes in the external environment and equipment aging. According to national standards, if SF6 gas leaks into the working environment and its concentration reaches 1000 μL / L, it will seriously affect personnel health if it is not promptly and effectively eliminated or its concentration reduced to within safe limits. Furthermore, SF6 gas leakage may also reduce the insulation performance of high-voltage electrical equipment, affecting the safe operation of the power system. Therefore, to effectively prevent and respond to SF6 gas leakage accidents and ensure the normal operation of equipment and environmental safety, continuous monitoring, efficient ventilation, and timely elimination of leaks are essential safeguards.

[0003] However, most current SF6 gas leak detection devices and ventilation equipment fail to effectively identify and quickly ventilate away the leak in its early stages. The response is untimely and the ventilation effectiveness is insufficient, resulting in a slow reduction in SF6 gas concentration after the leak. This increases the difficulty of handling SF6 leaks, the emergency response time, and the safe entry time. Utility Model Content

[0004] To address the problems of untimely response and insufficient ventilation effectiveness in detecting SF6 gas leaks in high-voltage electrical equipment as described in the background art, this utility model proposes an induced exhaust ventilation device for SF6 leaked gas in high-voltage electrical equipment.

[0005] The device of this utility model includes multiple induced draft fans and multiple detection units for detecting SF6 leaked gas; the detection units are installed at intervals below the high-voltage electrical equipment area; the induced draft fans are arranged between the detection units and the high-voltage electrical equipment area, the induced draft fans are movably installed on the induced draft fan ground guide rail, the induced draft fans are provided with multiple air outlet nozzles that can adjust the air outlet angle, and the air outlet nozzles of the induced draft fans cover the high-voltage electrical equipment area.

[0006] Furthermore, the detection unit is movably mounted on a ground guide rail for the detection unit.

[0007] Furthermore, the induced draft fan includes a housing, one end of which is provided with multiple air outlet nozzles that can adjust the air outlet angle, and the other end of which is provided with a filter screen and an air inlet; the housing is provided with an electric motor and an air outlet blade driven by the electric motor, and the air outlet direction of the air outlet blade is towards the air outlet nozzle.

[0008] Furthermore, the induced draft fans are arranged evenly at a certain angle.

[0009] Furthermore, the air outlet nozzle includes a first nozzle, a second nozzle, and a third nozzle arranged at intervals.

[0010] Furthermore, the angles between the first nozzle, the second nozzle, and the third nozzle and the horizontal line are respectively:

[0011]

[0012] Where θ1, θ2, and θ3 are the angles between the first nozzle, the second nozzle, and the third nozzle and the horizontal line, respectively; x1, x2, and x3 are the vertical distances from the first nozzle, the second nozzle, and the third nozzle to the high-voltage electrical equipment area, respectively; s1, s2, and s3 are the induced distances from the first nozzle, the second nozzle, and the third nozzle to the high-voltage electrical equipment area, respectively; and L is the length of the high-voltage electrical equipment area. By employing a multi-nozzle angle collaborative design and calculating the spray angle, it can be ensured that the air outlet covers the entire area of ​​the high-voltage electrical equipment.

[0013] Furthermore, the detection unit moves along the ground guide rail and performs timed automatic inspections of SF6 leaked gas.

[0014] Furthermore, the detection unit includes an SF6 gas monitoring sensor.

[0015] Furthermore, the number of induced draft fans installed at the SF6 gas leak point is determined based on the magnitude of the SF6 gas leak intensity obtained by the detection unit.

[0016] Furthermore, the device also includes a control unit, which is used to operate the detection unit to detect, acquire the detection data from the detection unit, and control the movement and start / stop of the induced draft fan based on the detection data. The control unit can intelligently schedule the induced draft fan based on real-time detection data, dynamically adjusting the number and position of the induced draft fan according to the leakage intensity, thereby achieving targeted treatment of the leak point.

[0017] Compared with the prior art, this utility model has the following advantages:

[0018] (1) Rapid response and precise handling: The detection unit enables automatic inspection of high-voltage electrical equipment areas, achieving early identification of SF6 leaked gas and improving emergency response speed; the induction fan enables rapid induction and removal of SF6 leaked gas, achieving precise handling of SF6 leaked gas;

[0019] (2) High efficiency in ventilation and exhaust: Multiple exhaust nozzles with adjustable air outlet angles, and exhaust nozzle coverage of high-voltage electrical equipment areas, achieve efficient exhaust of SF6 leaked gas.

[0020] (3) The device is simple and reliable: the detection unit and the induced draft fan have simple structures, are easy to maintain and replace, and have high reliability.

[0021] In summary, the device of this invention can effectively monitor SF6 gas leaks in high-voltage electrical equipment areas for a long period of time. It can promptly and effectively identify and quickly ventilate to eliminate SF6 gas leaks in the early stages. It responds promptly to SF6 gas leaks in high-voltage electrical equipment areas, effectively improving the ventilation efficiency of these areas. The concentration of SF6 gas decreases rapidly after a leak, greatly reducing the difficulty of handling SF6 gas leaks and the emergency response time, and significantly shortening the safe entry time into high-voltage electrical equipment areas. Attached Figure Description

[0022] Figure 1 A schematic diagram of the overall ventilation system for inducing exhaust.

[0023] Figure 2 This is a cross-sectional view of the induced draft fan.

[0024] Figure 3 This is a schematic diagram illustrating the principle of inducing the nozzle angle of a blower.

[0025] Explanation of reference numerals in the attached drawings: 1-First nozzle; 2-Second nozzle; 3-Third nozzle; 4-Outlet blade; 5-Motor; 6-Filter screen; 7-Air inlet; 8-Box; 9-Induction fan ground rail; 10-Detection unit ground rail; 11-Induction fan; 12-Detection unit. Detailed Implementation

[0026] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit the scope of this application. The positional relationships described in the embodiments are consistent with those shown in the accompanying drawings.

[0027] An induced exhaust ventilation device for SF6 leaked gas in high-voltage electrical equipment, the whole as follows Figure 1As shown, it consists of multiple induced draft fans 11 and multiple detection units 12 for detecting SF6 leaked gas.

[0028] like Figure 1 As shown, since SF6 gas is a typical heavy gas, the detection units 12 are installed at intervals below the high-voltage electrical equipment area, which facilitates the timely detection of SF6 gas leaks. Specifically, the detection units 12 are movably installed on the ground guide rail 10. Because the application scenarios of high-voltage electrical equipment are large and involve numerous cables, SF6 gas leaks can occur in any area where cables are installed. The detection units 12 move along the ground guide rail 10 and perform timed automatic inspections of SF6 gas leaks. When an SF6 gas leak occurs in any area, the leak location can be quickly located and appropriate feedback can be provided promptly. The detection unit 12 can be an SF6 gas monitoring sensor or other SF6 gas detection devices.

[0029] like Figure 1 As shown, the induced draft fan 11 is positioned between the detection unit 12 and the high-voltage electrical equipment area. The induced draft fan 11 is movably mounted on the induced draft fan ground rail 9. The induced draft fan 11 is equipped with multiple air outlet nozzles whose air outlet angle can be adjusted, and the air outlet of the induced draft fan 11 covers the high-voltage electrical equipment area. When the detection unit 12 detects a significant SF6 gas leak at a certain location, the detection unit 12 quickly locates the leak point and then moves the nearest induced draft fan 11 to that area and starts the induced draft fan 11, rapidly enhancing ventilation in that area.

[0030] like Figure 2 As shown, the induced draft fan 11 includes a housing 8. One end of the housing 8 is provided with multiple air outlet nozzles that can adjust the air outlet angle, and the other end of the housing 8 is provided with a filter screen 6 and an air inlet 7. Inside the housing 8, there is a motor 5 and an air outlet blade 4 driven by the motor 5. The air outlet blade 4 is directed towards the air outlet nozzle.

[0031] like Figure 1 and Figure 3 As shown, the induced draft fans 11 are evenly arranged at a certain angle. The number of induced draft fans 11 installed at the SF6 gas leak point is determined based on the magnitude of the SF6 gas leak intensity obtained by the detection unit 12.

[0032] like Figure 2 As shown, the air outlet nozzles are a first nozzle 1, a second nozzle 2, and a third nozzle 3 arranged at intervals. Figure 3 As shown, the angles between the first nozzle 1, the second nozzle 2, and the third nozzle 3 and the horizontal line are respectively:

[0033]

[0034]

[0035] Where θ1, θ2, and θ3 are the angles between the first nozzle 1, the second nozzle 2, and the third nozzle 3 and the horizontal line, respectively; x1, x2, and x3 are the vertical distances from the first nozzle 1, the second nozzle 2, and the third nozzle 3 to the high-voltage electrical equipment area, respectively; s1, s2, and s3 are the induced distances from the first nozzle 1, the second nozzle 2, and the third nozzle 3 to the high-voltage electrical equipment area, respectively; and L is the length of the high-voltage electrical equipment area.

[0036] In addition, the device is also equipped with a control unit, which is used to control the detection unit 12 to detect, acquire the detection data of the detection unit 12, and control the movement of the induced draft fan 11 and the start and stop of the induced draft fan 11 based on the detection data.

[0037] In the specific operation process, the workflow of the above-mentioned induced exhaust ventilation device is as follows:

[0038] (1) In the high-voltage electrical equipment area, the detection unit 12 monitors the SF6 gas content in the indoor air in a timed cycle on the ground guide rail 10 of the detection unit according to a certain motion law, and can display the value of SF6 gas content in real time on the display of the remote control center.

[0039] (2) When the detection unit 12 at a certain location detects that the SF6 gas content in the environment exceeds the set threshold, it outputs a signal to the input terminal of the control unit, and the control unit reacts immediately; at the same time, the remote monitoring center also receives the signal output by the detection unit 12, the sound and light alarm is triggered, and the personnel immediately give corresponding instructions.

[0040] (3) When the control unit receives a signal that the SF6 gas in a certain area exceeds the threshold, it judges the leakage intensity based on the monitored SF6 gas content and calculates the number of induced fans 11 to be turned on based on the leakage intensity. If the leakage intensity is large and the induced air volume provided by the induced fans 11 evenly distributed in the equipment area is insufficient to remove SF6 gas within the specified time, a certain number of induced fans 11 in adjacent equipment areas can be mobilized using the induced fan ground guide rail 9 to enhance ventilation in the leakage area.

[0041] (4) The activated induced draft fan 11 continuously strengthens ventilation and accelerates the removal of SF6 gas from the room;

[0042] (5) At this time, the detection unit 12 is still monitoring the SF6 gas content in a loop. When the SF6 gas content detected by the detection unit 12 at any location in the high-voltage electrical equipment area is lower than the safety threshold and remains so for a certain period of time, it indicates that the indoor SF6 gas has been basically completely eliminated, the area safety risk has been eliminated, and there will be no threat to the operation of the equipment and the health of personnel. At this time, the induced fan 11 is automatically stopped by the same control method. If the induced fan 11 has moved, it will be automatically controlled and returned to the original position after the induced fan 11 stops running.

[0043] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings and specific examples. However, the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

Claims

1. A ventilation device for induced exhaust of SF6 leaked gas in high-voltage electrical equipment, characterized in that: It includes multiple induced draft fans (11) and multiple detection units (12) for detecting SF6 leaked gas; the detection units (12) are installed at intervals below the high-voltage electrical equipment area; the induced draft fans (11) are arranged between the detection units (12) and the high-voltage electrical equipment area, the induced draft fans (11) are movably installed on the induced draft fan ground guide rail (9), the induced draft fans (11) are provided with multiple air outlet nozzles that can adjust the air outlet angle, and the air outlet nozzles of the induced draft fans (11) cover the high-voltage electrical equipment area.

2. The induced exhaust ventilation device for SF6 leaked gas in high-voltage electrical equipment according to claim 1, characterized in that: The detection unit (12) is movably installed on the ground guide rail (10) of the detection unit.

3. The induced exhaust ventilation device for SF6 leaked gas in high-voltage electrical equipment according to claim 2, characterized in that: The induced draft fan (11) includes a housing (8), one end of which is provided with multiple air outlet nozzles that can adjust the air outlet angle, and the other end of which is provided with a filter screen (6) and an air inlet (7); the housing (8) is provided with a motor (5) and an air outlet blade (4) driven by the motor (5), and the air outlet blade (4) is directed towards the air outlet nozzle.

4. The induced exhaust ventilation device for SF6 leaked gas in high-voltage electrical equipment according to claim 3, characterized in that: The induced draft fans (11) are arranged evenly at a certain angle.

5. The induced exhaust ventilation device for SF6 leaked gas in high-voltage electrical equipment according to claim 4, characterized in that: The air outlet nozzles include a first nozzle (1), a second nozzle (2), and a third nozzle (3) arranged at intervals.

6. The induced exhaust ventilation device for SF6 leaked gas in high-voltage electrical equipment according to claim 5, characterized in that: The angles between the first nozzle (1), the second nozzle (2), and the third nozzle (3) and the horizontal line are respectively: Wherein, θ1, θ2, and θ3 are the angles between the first nozzle (1), the second nozzle (2), and the third nozzle (3) and the horizontal line, respectively; x1, x2, and x3 are the vertical distances from the first nozzle (1), the second nozzle (2), and the third nozzle (3) to the high-voltage electrical equipment area, respectively; s1, s2, and s3 are the induced distances from the first nozzle (1), the second nozzle (2), and the third nozzle (3) to the high-voltage electrical equipment area, respectively; and L is the length of the high-voltage electrical equipment area.

7. The induced exhaust ventilation device for SF6 leaked gas in high-voltage electrical equipment according to claim 2, characterized in that: The detection unit (12) moves along the ground guide rail (10) and performs timed automatic inspections of SF6 leaked gas.

8. The induced exhaust ventilation device for SF6 leaked gas in high-voltage electrical equipment according to claim 7, characterized in that: The detection unit (12) includes an SF6 gas monitoring sensor.

9. The induced exhaust ventilation device for SF6 leaked gas in high-voltage electrical equipment according to claim 8, characterized in that: The number of induced draft fans (11) installed at the SF6 gas leak point is determined based on the magnitude of the SF6 gas leak intensity obtained by the detection unit (12).

10. The induced exhaust ventilation device for SF6 leaked gas in high-voltage electrical equipment according to claim 2, characterized in that: It also includes a control unit, which is used to control the detection unit (12) to detect, acquire the detection data of the detection unit (12), and control the movement of the induced draft fan (11) and the start and stop of the induced draft fan (11) based on the detection data.

Images