CN219104874U - Sulfur hexafluoride gas leakage detection device - Google Patents
Sulfur hexafluoride gas leakage detection device Download PDFInfo
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- CN219104874U CN219104874U CN202223528729.5U CN202223528729U CN219104874U CN 219104874 U CN219104874 U CN 219104874U CN 202223528729 U CN202223528729 U CN 202223528729U CN 219104874 U CN219104874 U CN 219104874U
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- sulfur hexafluoride
- hexafluoride gas
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Abstract
The utility model discloses a sulfur hexafluoride gas leakage detection device, which comprises: the box body is provided with an inner cavity, electrical equipment is placed in the inner cavity, a first ventilation opening is formed in the upper end of the box body, and a second ventilation opening is formed in the lower end of the box body; the box door is rotationally connected to the box body and can rotate to seal the inner cavity; the first air channel is arranged at the upper end of the box body, and a first port of the first air channel is communicated with the first ventilation opening; the first fan is arranged at the second port of the first air duct; the detection device is arranged in the inner cavity and is used for detecting the concentration of sulfur hexafluoride gas; the locking device is arranged on the box body and can lock the box door and the box body; the device can reduce the danger of field maintenance personnel when sulfur hexafluoride gas leaks.
Description
Technical Field
The utility model relates to the field of use and maintenance of electrical equipment, in particular to a sulfur hexafluoride gas leakage detection device.
Background
In an electric power system, sulfur hexafluoride gas is widely applied to electrical equipment such as large transformers, switch cabinets and the like due to excellent insulation and arc extinguishing performance, and normal SF6 gas is colorless, odorless, heavier than air in density and not easy to mix with air, so that the sulfur hexafluoride gas has no toxicity to a human body; however, under the action of high-voltage arc, SF6 gas is partially decomposed, and the decomposition products often contain extremely toxic substances, so that a sulfur hexafluoride gas monitoring system is needed to monitor whether leakage occurs in electrical equipment containing sulfur hexafluoride gas.
In the existing sulfur hexafluoride gas monitoring system, after sulfur hexafluoride gas leakage is monitored, an alarm signal is sent to remind field maintenance personnel of treatment; however, when large-scale electrical equipment leaks more sulfur hexafluoride gas, the leaked SF6 gas and decomposition products thereof can accumulate in a low-level space, so that local hypoxia and toxicity are caused, and serious danger is formed for life safety of field maintenance personnel.
Disclosure of Invention
The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides the sulfur hexafluoride gas leakage detection device which can reduce the danger of field maintenance personnel when sulfur hexafluoride gas leaks.
The sulfur hexafluoride gas leakage detecting device of the utility model comprises: the box body is provided with an inner cavity, electrical equipment is placed in the inner cavity, a first ventilation opening is formed in the upper end of the box body, and a second ventilation opening is formed in the lower end of the box body; the box door is rotationally connected to the box body and can rotate to seal the inner cavity; the first air channel is arranged at the upper end of the box body, and a first port of the first air channel is communicated with the first ventilation opening; the first fan is arranged at the second port of the first air duct; the detection device is arranged in the inner cavity and is used for detecting the concentration of sulfur hexafluoride gas; the locking device is arranged on the box body and can lock the box door with the box body.
According to some embodiments of the utility model, the sulfur hexafluoride gas leakage detection device further includes: the second air channel is arranged at the lower end of the box body, and a first port of the second air channel is communicated with the second air vent; the first switch valve is arranged at the third port of the first air duct; the second switch valve is arranged at a second port of the first air duct; the third switch valve is arranged at the second port of the second air duct; and the fourth switch valve and the second fan are arranged at the third port of the second air duct.
According to some embodiments of the utility model, the third switch valve is connected to a gas storage device, and the gas storage device is used for storing sulfur hexafluoride gas.
According to some embodiments of the utility model, the sulfur hexafluoride gas leakage detection device further includes a dehumidification device for drying air entering the second port of the second air duct.
According to some embodiments of the utility model, the dehumidifying apparatus includes: the evaporator is arranged at the second port of the second air duct; the condenser is arranged at a second port of the second air channel, and outdoor air sequentially passes through the evaporator and the condenser to enter the second air channel; the evaporator, the condenser and the compressor together form a refrigerant cycle.
According to some embodiments of the utility model, a compressor is disposed within the interior cavity.
According to some embodiments of the utility model, a second fan is disposed between the dehumidification device and the second wind tunnel.
According to some embodiments of the utility model, the locking means comprise an electromagnet provided on the box, said electromagnet being able to engage the door.
According to some embodiments of the utility model, the detection means are provided at the bottom wall of said cavity.
By using the sulfur hexafluoride gas leakage detection device, when sulfur hexafluoride gas in the electrical equipment leaks, the detection device can detect the sulfur hexafluoride gas, then the locking device is controlled to lock the box door immediately, then the first fan is started to blow downwards in the inner cavity, and the sulfur hexafluoride gas can be discharged from the second ventilation opening in time under the blowing of the air flow due to the fact that the density of the sulfur hexafluoride is higher than that of the air; when the detection device detects that the concentration of sulfur hexafluoride gas is lower than a normal value, the locking device unlocks the cabin door, and on-site maintenance personnel can maintain the electrical equipment in the inner cavity; because a large amount of leaked sulfur hexafluoride gas is discharged before maintenance, the concentration of sulfur hexafluoride gas in the inner cavity is low, and the risk to field maintenance personnel is greatly reduced.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.
Drawings
The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is an isometric view of a sulfur hexafluoride gas leak detection device in an example embodiment of the utility model;
FIG. 2 is an isometric view of a sulfur hexafluoride gas leak detection device with a door removed in an example embodiment of the utility model;
fig. 3 is a front view of the sulfur hexafluoride gas leak detection device of fig. 2;
fig. 4 is a cross-sectional view in the direction F-F of fig. 3.
The above figures contain the following reference numerals.
Detailed Description
Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.
In the description of the present utility model, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.
In the description of the present utility model, a plurality means one or more, and a plurality means two or more, and it is understood that greater than, less than, exceeding, etc. does not include the present number, and it is understood that greater than, less than, within, etc. include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.
Referring to fig. 1 to 4, the sulfur hexafluoride gas leakage detecting device of the present embodiment includes: the box body 100, the box body 100 is provided with an inner cavity, the electric equipment 130 is placed in the inner cavity, the upper end of the box body 100 is provided with a first ventilation opening, and the lower end of the box body 100 is provided with a second ventilation opening; the box door 110 is rotatably connected to the box body 100, and the box door 110 can rotate to close the inner cavity; the first air duct 210 is disposed at the upper end of the box body 100, and a first port of the first air duct 210 is communicated with the first ventilation opening; a first fan 240 disposed at the second port of the first air duct 210; the detection device 150 is arranged in the inner cavity, and the detection device 150 is used for detecting the concentration of sulfur hexafluoride gas; and a locking device 120 provided on the cabinet 100, the locking device 120 being capable of locking the cabinet door 110 with the cabinet 100.
By using the sulfur hexafluoride gas leakage detection device, when sulfur hexafluoride gas in the electrical equipment 130 leaks, the detection device 150 can detect the sulfur hexafluoride gas, then immediately control the locking device 120 to lock the box door 110, then start the first fan 240 to blow down the interior cavity, and since the density of sulfur hexafluoride is higher, the sulfur hexafluoride gas can be timely discharged from the second ventilation opening under the blowing of the air flow; when the detection device 150 detects that the sulfur hexafluoride gas concentration is lower than the normal value, the locking device 120 unlocks the cabin door, and on-site maintenance personnel can maintain the electrical equipment 130 in the inner cavity; because a large amount of leaked sulfur hexafluoride gas is discharged before maintenance, the concentration of sulfur hexafluoride gas in the inner cavity is low, and the risk to field maintenance personnel is greatly reduced.
The locking device 120 can lock the door 110 in various ways, for example, a motor drives a retractable lock tongue to be inserted into the door 110, so that the door 110 is locked with the case 100, or the door 110 is attracted by magnetic attraction or the like; after the sulfur hexafluoride gas in the electric equipment 130 leaks, the box door 110 is locked, so that not only can the danger caused by the fact that a maintainer opens the box door 110 immediately be prevented, but also the leaked sulfur hexafluoride gas can be discharged from the second air inlet as soon as possible, and the concentration of the sulfur hexafluoride gas in the box body 100 can reach a safe level as soon as possible.
In this embodiment, the detecting device 150 may be a sulfur hexafluoride detector commonly used in the prior art, such as an infrared sulfur hexafluoride detector, which can convert a signal with higher sulfur hexafluoride concentration into an electrical signal when detecting that the sulfur hexafluoride concentration is higher, and transmit the electrical signal to the control system, and the control system can start the locking device 120 and control the first fan 240 to be turned on, so as to rapidly discharge the leaked sulfur hexafluoride gas.
As shown in fig. 2 to 4, the sulfur hexafluoride gas leakage detecting device further includes: the second air duct 310 is arranged at the lower end of the box body 100, and a first port of the second air duct 310 is communicated with the second air vent; a first switching valve 220 disposed at a third port of the first air duct 210; a second switch valve 230 disposed at a second port of the first duct 210; a third switch valve 320 disposed at a second port of the second air duct 310; the fourth switch valve 330 and the second fan 340 are both disposed at the third port of the second air duct 310; in normal operation, the third switch valve 320 and the second switch valve 230 are closed, the first switch valve 220 and the fourth switch valve 330 are opened, the second fan 340 is operated to blow air flow into the inner cavity from the second air inlet, take away heat of the electrical equipment 130 and discharge the heat into the first air duct 210 through the first air vent, and the air flow is opened after passing through the first switch valve 220; when the detecting device 150 detects that the sulfur hexafluoride gas concentration is higher, the control system immediately controls the locking device 120 to lock the box door 110; while the third and second switching valves 320 and 230 are opened, the first and fourth switching valves 220 and 330 are closed, the second fan 340 is closed, and the first fan 240 is opened; air enters from the second switch valve 230, enters the inner cavity through the first air duct 210, discharges leaked sulfur hexafluoride gas into the second air duct 310, and is discharged from the third switch valve 320; the fastest speed reduces the concentration of sulfur hexafluoride gas in the cavity.
In order to prevent environmental pollution caused by leakage of sulfur hexafluoride gas, and recycle the leaked sulfur hexafluoride gas, the third switch valve 320 is connected with a gas storage device, and the gas storage device is used for storing sulfur hexafluoride gas; the gas storage device may use an existing sulfur hexafluoride recovery device in the prior art, and may purify and collect the mixed gas of sulfur hexafluoride and air discharged by the third switch valve 320.
As shown in fig. 4, the sulfur hexafluoride gas leakage detecting device further includes a dehumidifying device 350, where the dehumidifying device 350 is used for drying the air entering the second port of the second air duct 310; when the electrical equipment 130 works normally, the dehumidifying device 350 can dry the air blown by the second fan 340, so that the air humidity in the inner cavity is reduced, which is beneficial to improving the safety of the electrical equipment; specifically, the dehumidifying apparatus may employ a dehumidifying apparatus existing in the prior art, for example, an adsorption dehumidifying apparatus using a water absorbing agent, or a semiconductor dehumidifying apparatus using a semiconductor refrigerating element, or the like.
Specifically, the dehumidifying apparatus 350 includes: an evaporator disposed at a second port of the second air duct 310; a condenser disposed at a second port of the second air duct 310, and outdoor air sequentially passes through the evaporator and the condenser to enter the second air duct 310; a compressor 140, wherein the evaporator, the condenser and the compressor 140 together form a refrigerant cycle; when the whole refrigerant is circulated and operated, air sequentially passes through the evaporator, the condenser, the second fan 340 and the fourth switch valve 330 and then enters the second air duct 310, so that the temperature of the air is not greatly changed while the air humidity is remarkably reduced, and the working environment temperature of the electrical equipment 130 is prevented from being too high or too low.
As shown in fig. 2, the compressor 140 is disposed within the interior cavity; when the electrical equipment 130 works normally, the compressor 140 can also dissipate heat through the ascending air flow in the inner cavity, so that the working stability of the compressor 140 is ensured.
As shown in fig. 4, a second fan 340 is disposed between the dehumidifying apparatus 350 and the second air path 310; wherein, the air sequentially passes through the dehumidifying device 350, the second fan 340 and the fourth switch valve 330 and then enters the first air duct 210.
As shown in fig. 2, the locking device 120 includes an electromagnet provided on the cabinet 100, the electromagnet being capable of engaging the cabinet door 110; when the detecting device 150 detects that the concentration of sulfur hexafluoride gas is too high, the electromagnet can rapidly attract the box door 110, so that the whole inner cavity is closed, and the leaked sulfur hexafluoride gas is ensured to enter the gas storage device from the third switch valve 320, so that the gas storage device can fully collect the leaked sulfur hexafluoride gas.
As shown in fig. 3, the detecting device 150 is disposed at the bottom wall of the cavity; since sulfur hexafluoride gas has a higher density than air, sulfur hexafluoride gas will be deposited at the bottom of the cavity when it leaks, and thus the arrangement of the detecting means 150 at the bottom wall of the cavity can detect sulfur hexafluoride gas leakage at the fastest speed.
The embodiments of the present utility model have been described in detail with reference to the accompanying drawings, but the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present utility model.
Claims (9)
1. A sulfur hexafluoride gas leak detection device, comprising:
the box body (100), the box body (100) is provided with an inner cavity, electrical equipment (130) is placed in the inner cavity, a first ventilation opening is formed in the upper end of the box body (100), and a second ventilation opening is formed in the lower end of the box body (100); the box door (110) is rotationally connected to the box body (100), and the box door (110) can rotate to seal the inner cavity;
the first air duct (210) is arranged at the upper end of the box body (100), and a first port of the first air duct (210) is communicated with the first ventilation opening;
a first fan (240) disposed at a second port of the first air duct (210);
the detection device (150) is arranged in the inner cavity, and the detection device (150) is used for detecting the concentration of sulfur hexafluoride gas;
and the locking device (120) is arranged on the box body (100), and the locking device (120) can lock the box door (110) and the box body (100).
2. The sulfur hexafluoride gas leak detection apparatus as defined in claim 1, further comprising:
the second air duct (310) is arranged at the lower end of the box body (100), and a first port of the second air duct (310) is communicated with the second air vent;
a first switching valve (220) disposed at a third port of the first air duct (210);
a second switching valve (230) disposed at a second port of the first air duct (210);
a third switching valve (320) disposed at a second port of the second air duct (310);
the fourth switch valve (330) and the second fan (340) are both arranged at the third port of the second air duct (310).
3. The sulfur hexafluoride gas leakage detection device according to claim 2, wherein the third switch valve (320) is connected to a gas storage device for storing sulfur hexafluoride gas.
4. The sulfur hexafluoride gas leak detection apparatus of claim 2, further comprising a dehumidification device (350), the dehumidification device (350) for drying air entering the second port of the second air duct (310).
5. The sulfur hexafluoride gas leak detection apparatus as defined in claim 4, wherein said dehumidification device (350) includes:
an evaporator arranged at a second port of the second air duct (310);
the condenser is arranged at a second port of the second air duct (310), and outdoor air sequentially passes through the evaporator and the condenser to enter the second air duct (310);
-a compressor (140), said evaporator, said condenser and said compressor (140) together forming a refrigerant cycle.
6. The sulfur hexafluoride gas leak detection apparatus of claim 5, wherein said compressor (140) is disposed within said interior cavity.
7. The sulfur hexafluoride gas leak detection apparatus of claim 4, wherein the second fan (340) is disposed between the dehumidification device (350) and the second air duct (310).
8. The sulfur hexafluoride gas leak detection apparatus of claim 2, wherein the locking means (120) includes an electromagnet disposed on the tank (100) capable of engaging the tank door (110).
9. The sulfur hexafluoride gas leak detection apparatus of claim 2, wherein the detection device (150) is disposed at the bottom wall of the interior cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223528729.5U CN219104874U (en) | 2022-12-29 | 2022-12-29 | Sulfur hexafluoride gas leakage detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223528729.5U CN219104874U (en) | 2022-12-29 | 2022-12-29 | Sulfur hexafluoride gas leakage detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219104874U true CN219104874U (en) | 2023-05-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223528729.5U Active CN219104874U (en) | 2022-12-29 | 2022-12-29 | Sulfur hexafluoride gas leakage detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219104874U (en) |
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- 2022-12-29 CN CN202223528729.5U patent/CN219104874U/en active Active
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