阅读说明：本技术 一种便携式全自动报警补气装置及使用方法 (Portable full-automatic alarm air supplementing device and using method ) 是由 朱榜超 潘邦彪 曾奥云 蒋宗广 黄利达 覃贤金 于 2019-10-30 设计创作，主要内容包括：本发明公开了一种便携式全自动报警补气装置及使用方法,所述装置包括储气罐,气动自调阀,缓冲罐、除湿罐；所述储气罐用于储存六氟化硫,储气罐的出口与气动自调阀的进口连接,所述气动自调阀的出口与缓冲罐的进口连接,所述缓冲罐的出口与除湿罐的进口连接,所述除湿罐的出口与六氟化硫电气设备的进气口连接,所述气动自调阀与控制系统电连接,所述控制系统基于PLC建立。本发明可以自动检测变电站中使用六氟化硫的电气设备的六氟化硫压力,在发生六氟化硫泄漏时及时报警并能够自动补气。(The invention discloses a portable full-automatic alarm air supplementing device and a use method thereof, wherein the device comprises an air storage tank, a pneumatic self-regulating valve, a buffer tank and a dehumidifying tank; the pneumatic self-regulating valve is electrically connected with a control system, and the control system is established based on a PLC. The invention can automatically detect the sulfur hexafluoride pressure of the electrical equipment using sulfur hexafluoride in the transformer substation, alarm in time when sulfur hexafluoride leakage occurs and can automatically supplement air.)

1. The utility model provides a portable full-automatic alarm air supplement unit which characterized in that: comprises a gas storage tank (1), a pneumatic self-regulating valve (2), a buffer tank (3), a dehumidification tank (4) and a control system; the sulfur hexafluoride gas storage tank is characterized in that the gas storage tank (1) is used for storing sulfur hexafluoride, an outlet of the gas storage tank (1) is connected with an inlet of the pneumatic self-regulating valve (2), an outlet of the pneumatic self-regulating valve (2) is connected with an inlet of the buffer tank (3), an outlet of the buffer tank (3) is connected with an inlet of the dehumidifying tank (4), an outlet of the dehumidifying tank (4) is connected with an air inlet of sulfur hexafluoride electrical equipment (5), the pneumatic self-regulating valve (2) is electrically connected with the control system, and the control system is established on the basis of PLC.

2. The portable full-automatic alarm air supplementing device according to claim 1, characterized in that: the buffer tank (3) comprises a tank body (31), a baffle plate (34) and an acousto-optic alarm lamp (35); the acousto-optic alarm lamp (35) is arranged at the top of the tank body (31); the inner walls above and below the inlet of the tank body (31) are respectively provided with a groove, the bottom surface of each groove is provided with a pressure sensor (32), each pressure sensor (32) is fixedly connected with a spring (33), the top of each spring (33) is fixedly connected with one end of a baffle (34), and under the action of the tensile force of each spring (33), each baffle (34) is tightly attached to the inner wall of the tank body (31) and completely blocks the inlet of the tank body (31); the pressure sensor (32) is electrically connected with the control system.

3. The portable full-automatic alarm air supplementing device according to claim 1 or 2, characterized in that: and anhydrous calcium chloride is filled in the dehumidification tank (4).

4. The portable full-automatic alarm air supplementing device according to claim 3, characterized in that: still be connected with check valve (6) between dehumidification jar (4) and sulfur hexafluoride electrical equipment (5), the export of check valve (6) is connected with the air inlet of sulfur hexafluoride electrical equipment (5), the import of check valve (6) and the exit linkage of dehumidification jar (4).

5. The use method of the portable full-automatic alarm air supplement device as claimed in claim 1 or 4, wherein: the method comprises the following steps:

s1, installing a sulfur hexafluoride gas pressure gauge on sulfur hexafluoride electrical equipment (5), and then transmitting detected pressure data to a control system of the portable full-automatic alarm gas supplementing device;

s2, when the pressure value is smaller than the normal value set by the control system, the control system controls the pneumatic self-regulating valve (2) to be opened to perform air supplementing operation, the supplemented air rushes off a baffle (34) at the inlet of the buffer tank (3) to enter the buffer tank (3), and then the gas enters sulfur hexafluoride electrical equipment (5) after moisture is absorbed by the dehumidifying tank (4);

s3, when air is supplied, the spring (33) is pulled by the baffle (34), and meanwhile, the pressure sensor (32) at the tail end of the spring (33) detects the tensile force borne by the spring (33) and transmits the detection data to the control system; when the pulling force exceeds a limit value, the control system starts an audible and visual alarm (35) to give an alarm, and simultaneously adjusts the opening degree of the pneumatic self-regulating valve (2) to reduce the gas entering the buffer tank (3);

s4, when the pressure of sulfur hexafluoride gas in the sulfur hexafluoride electrical equipment (5) reaches a normal value, the control system closes the pneumatic self-regulating valve (2), gas supplement is stopped, and the baffle (34) resets under the action of the spring (33) to completely block the inlet of the buffer tank (3).

Technical Field

The invention belongs to the technical field of gas compensation of sulfur hexafluoride equipment used in a transformer substation, and particularly relates to a portable full-automatic alarm gas compensation device and a use method thereof.

Background

Sulfur hexafluoride is a stable gas which is colorless, odorless, nontoxic and noncombustible, and from the middle of the 60 s, sulfur hexafluoride is widely used as an insulating medium of high-voltage electrical equipment, sulfur hexafluoride gas-insulated fully-closed switchgear occupies a much smaller area than conventional open high-voltage power distribution equipment, and the operation of the sulfur hexafluoride gas-insulated fully-closed switchgear is not affected by external weather and environmental conditions, so that the sulfur hexafluoride gas-insulated fully-closed switchgear is not only widely used in ultrahigh-voltage and extra-high-voltage power systems, but also has begun to be used in power distribution networks. The sulfur hexafluoride gas insulated pipeline power transmission line has the advantages of small dielectric loss and large transmission capacity, and can be used in high-fall occasions, so that the sulfur hexafluoride gas insulated pipeline power transmission line is commonly used for outlet wires of hydropower stations to replace conventional oil-filled cables, and the sulfur hexafluoride gas insulated transformer has the advantages of fire prevention and explosion prevention, and is particularly suitable for power supply of densely populated areas and high-rise buildings.

Although electrical equipment using sulfur hexafluoride has been popularized to operate in the whole network, sulfur hexafluoride electrical equipment also has some disadvantages, such as sulfur hexafluoride gas which is cut off by an electric arc is extremely toxic, and the penetration of external moisture and air can cause the increase of toxic substances, thereby seriously affecting the electrical performance of the equipment, corroding the equipment and harming the health of workers; meanwhile, the leakage of sulfur hexafluoride gas greatly increases the workload of the transformer maintenance team for air supplement of the electrical equipment, most transformer substations are located at a distance of at least 50 kilometers away from the local part, most of the air supplement work is temporary or urgent, and the air supplement work is more in the morning or at night, so that the workload of maintenance personnel is high, personal risks are easy to occur in night operation, multiple persons are required to be matched with each other in the air supplement process, the air pressure of the equipment is concerned all the time, the air pipe valve is adjusted for multiple times, the inflation efficiency is low, and the labor and the working cost are high.

Disclosure of Invention

Aiming at the defects, the invention discloses a portable full-automatic alarm gas supplementing device and a using method thereof, which can automatically detect the pressure of sulfur hexafluoride of electrical equipment using sulfur hexafluoride in a transformer substation, alarm in time when sulfur hexafluoride leaks and supplement gas automatically.

The invention is realized by adopting the following technical scheme:

a portable full-automatic alarming air supplement device comprises an air storage tank, a pneumatic self-regulating valve, a buffer tank, a dehumidification tank and a control system; the pneumatic self-regulating valve is electrically connected with a control system, and the control system is established based on a PLC.

Further, the buffer tank comprises a tank body, a baffle plate and an acousto-optic alarm lamp; the acousto-optic alarm lamp is arranged at the top of the tank body; the inner walls above and below the inlet of the tank body are respectively provided with a groove, the bottom surface of each groove is provided with a pressure sensor, each pressure sensor is fixedly connected with a spring, the top of each spring is fixedly connected with one end of a baffle, and under the action of the tensile force of each spring, the baffles are tightly attached to the inner walls of the tank body and completely block the inlet of the tank body; the pressure sensor is electrically connected with the control system.

Further, anhydrous calcium chloride is filled in the dehumidification tank. Therefore, a small amount of moisture in the sulfur hexafluoride can be absorbed, and the humidity of the sulfur hexafluoride in the sulfur hexafluoride electrical equipment is reduced.

Furthermore, a check valve is connected between the dehumidification tank and the sulfur hexafluoride electrical equipment, an outlet of the check valve is connected with an air inlet of the sulfur hexafluoride electrical equipment, and an inlet of the check valve is connected with an outlet of the dehumidification tank.

The use method of the portable full-automatic alarm air supplementing device comprises the following steps:

s1, installing a sulfur hexafluoride gas pressure gauge on sulfur hexafluoride electrical equipment, and then transmitting detected pressure data to a control system of a portable full-automatic alarm gas supplementing device;

s2, when the pressure value is smaller than a normal value set by the control system, the control system controls the pneumatic self-regulating valve to open for air supplement operation, the supplemented air rushes off a baffle plate at an inlet of the buffer tank to enter the buffer tank, and then the supplemented air enters sulfur hexafluoride electrical equipment after moisture is absorbed by the dehumidification tank;

s3, when air is supplied, the spring is pulled by the baffle, and meanwhile, the pressure sensor at the tail end of the spring detects the tensile force borne by the spring and transmits the detection data to the control system; when the pulling force exceeds a limit value, the control system starts an audible and visual alarm to give an alarm, and simultaneously adjusts the opening of the pneumatic self-regulating valve to reduce the gas entering the buffer tank;

and S4, when the pressure of sulfur hexafluoride gas of the sulfur hexafluoride electrical equipment reaches a normal value, the control system closes the pneumatic self-regulating valve, the gas is stopped to be supplemented, and the baffle plate is reset under the action of the spring to completely block the inlet of the buffer tank.

Compared with the prior art, the technical scheme has the following beneficial effects:

the sulfur hexafluoride pressure detection device is simple in structure, can automatically detect the sulfur hexafluoride pressure of electrical equipment using sulfur hexafluoride in a transformer substation, can give an alarm in time when sulfur hexafluoride leaks, can automatically supplement air, greatly improves the working efficiency, reduces personal risks, improves the working efficiency, and saves labor and working cost.

Drawings

Fig. 1 is a schematic structural diagram of the portable full-automatic alarm gas supplementing device in this embodiment 1.

Fig. 2 is a schematic view of the structure of the surge tank described in embodiment 1 and embodiment 2.

Fig. 3 is a schematic structural diagram of the portable full-automatic alarm gas supplementing device in this embodiment 2.

Reference numerals: 1-gas storage tank, 2-pneumatic self-regulating valve, 3-buffer tank, 4-dehumidification tank, 5-sulfur hexafluoride electrical equipment, 6-check valve, 31-tank body, 32-pressure sensor, 33-spring, 34-baffle and 35-acousto-optic alarm lamp.

Detailed Description

The invention will be further described with reference to the following drawings and examples, but the invention is not limited to these examples. The specific experimental conditions and methods not indicated in the following examples are generally conventional means well known to those skilled in the art.