Prefabricated substation with monitoring and alarming functions

Abstract

The utility model relates to the technical field of preassembled transformer substations, and discloses a preassembled transformer substation with monitoring and alarming functions, which comprises a preassembled box body and a circulating system, electrical equipment is arranged in the preassembled box body, a monitoring mechanism is arranged above the electrical equipment, one side of the monitoring mechanism is provided with the circulating system, and the circulating system is connected with the preassembled box body. And the monitoring mechanism and the circulating system are separated by a partition plate of the preassembled box body. Through the arrangement of the circulating system and the sulfur hexafluoride sensor, when electrical equipment breaks down and SF6 gas leaks, the SF6 gas is adsorbed through an adsorbent, the concentration of the SF6 gas in the preassembled box body is reduced in time, danger is prevented from happening to workers, meanwhile, the adsorbed SF6 gas is collected into the gas storage tank through a circulating drying method, and the SF6 gas is stored in the gas storage tank. The recycling rate of the gas is improved, the use cost of the device is reduced, and after the SF6 gas is adsorbed and collected, the harmless gas is discharged by the electromagnetic valve, so that the harmful gas is prevented from being directly discharged out of the harmful environment.

Description

Technical Field

[0001] The utility model relates to the technical field of prefabricated transformer substations, in particular to a prefabricated transformer substation with monitoring and alarm functions. Background Art

[0002] Sulfur hexafluoride gas has excellent insulation and arc extinguishing properties and is widely used in gas-filled switchgear, high-voltage and ultra-high-voltage combination electrical appliances in power systems as an insulating medium for high-voltage electrical equipment.

[0003] Sulfur hexafluoride gas is a colorless, odorless, non-toxic and non-flammable gas at normal temperature and pressure. Its density is heavier than air. If it leaks in large quantities, it will accumulate in low-lying or poorly ventilated areas, resulting in a lack of local oxygen and suffocation of people.

[0004] The existing prefabricated substation with monitoring and alarm functions has the following problems when in use: In an intelligent monitoring prefabricated substation with publication number CN209561991U, it is proposed that "the body includes a low-voltage room, a transformer room and a high-voltage room, the top of the right side wall of the main box body is provided with an exhaust fan, the bottom of the right side wall of the main box body is provided with a blower, and the pipe openings of the air inlet pipe and the air outlet pipe are both provided with double-layer dust-proof nets, and desiccant is provided between the double-layer dust-proof nets, the outer surface of the top of the main box body is provided with a solar cell panel and an audible and visual alarm, and a transparent The main box is also provided with a temperature sensing device and a humidity sensing device. "Although the above device has good dustproof, dehumidification, heat dissipation effects, energy saving and strong safety, the above device still has the following problems: First, the leakage of sulfur hexafluoride from electrical equipment such as inflatable switchgear and combined electrical appliances in the prefabricated substation may cause casualties. The above device does not have the corresponding monitoring function. Second, SF6 is a greenhouse gas, and its global warming potential (GWP) is thousands of times that of CO2. The above device will discharge SF6 directly into the air, which is harmful to the environment. Second, in general, inflatable switchgear usually has the function of re-inflating. The above device discharges the leaked SF6 gas and needs to replenish SF6 gas to the electrical components, which increases the use cost of the device. Therefore, we need a more convenient prefabricated substation to improve the practicality of the device. Utility Model Content

[0005] The purpose of the utility model is to provide a prefabricated substation with a monitoring and alarm function to solve the problem that the inflatable switchgear proposed in the above-mentioned background technology usually has the function of re-inflating, and the above-mentioned device discharges the leaked SF6 gas and requires the electrical components to be re-supplemented with SF6 gas, which increases the use cost of the device.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a prefabricated substation with monitoring and alarm functions, comprising a prefabricated box and a circulation system, wherein electrical equipment is arranged inside the prefabricated box, a monitoring mechanism is arranged above the electrical equipment, a circulation system is arranged on one side of the monitoring mechanism, and the monitoring mechanism and the circulation system are separated by a partition of the prefabricated box.

[0007] Preferably, a sulfur hexafluoride sensor is arranged above the electrical equipment, and a controller is arranged on one side of the electrical equipment.

[0008] Preferably, a display screen is provided on the front of the preassembled box.

[0009] Preferably, the bottom slot inside the pre-installed box partition is connected to an exhaust fan, the top of the pre-installed box is provided with an audible and visual alarm, and one side of the audible and visual alarm is provided with a signal transmission device.

[0010] Preferably, a ventilation duct is connected to one side of the exhaust fan, the exhaust end of the ventilation duct leads to the outside of the preassembled box, a sulfur hexafluoride sensor is arranged inside the exhaust end of the ventilation duct, and a solenoid valve is arranged at the top of the exhaust end of the ventilation duct.

[0011] Preferably, the ventilation duct runs through the adsorbent storage tank, and a switchable adding port is provided on the outer surface of the adsorbent storage tank.

[0012] Preferably, a heating wire is provided below the adsorbent storage tank, and the upper surface and side surfaces of the adsorbent storage tank are connected to a circulation pipeline.

[0013] Preferably, a condenser is provided above the circulation pipeline, and the gas storage tank is connected to the adsorbent storage tank through the circulation pipeline.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The utility model is provided with a circulation system and a sulfur hexafluoride sensor. When an electrical device fails and SF6 gas leaks, the SF6 gas is adsorbed by an adsorbent, and the concentration of SF6 gas in the pre-installed box is reduced in time to prevent danger to the staff. At the same time, the adsorbed SF6 gas is collected into a gas storage tank through a circulation drying method, thereby improving the gas reuse rate and reducing the use cost of the device. After the SF6 gas is adsorbed and collected, the harmless gas is discharged by a solenoid valve to prevent the harmful gas from being directly discharged into the harmful environment.

[0016] 2. The utility model is provided with a monitoring mechanism, when a fault occurs in the device, the exhaust fan will promptly discharge the SF6 gas to prevent danger to the staff, and at the same time the display screen and the sound and light alarm will make the warning function visible and audible, so as to facilitate the nearby management personnel to detect the fault in time, and the signal transmission device will transmit the alarm signal to the signal terminal, so as to facilitate the staff to find and deal with the fault in time, thereby improving the safety of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0018] Figure 2 It is a schematic diagram of the monitoring mechanism of the utility model.

[0019] Figure 3 It is a schematic diagram of the side sectional structure of the utility model.

[0020] Figure 4 It is a schematic diagram of the circulation system structure of the utility model.

[0021] In the figure: 1. Pre-installed box; 2. Electrical equipment; 3. Monitoring mechanism; 301. Sulfur hexafluoride sensor; 302. Controller; 303. Display screen; 304. Exhaust fan; 305. Sound and light alarm; 306. Signal transmission device; 4. Circulation system; 401. Ventilation duct; 402. Solenoid valve; 403. Adsorbent storage tank; 404. Heating wire; 405. Circulation duct; 406. Condenser; 407. Gas storage tank. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-4 A prefabricated substation with monitoring and alarm functions includes a prefabricated box 1 and a circulation system 4. An electrical device 2 is arranged inside the prefabricated box 1, a monitoring mechanism 3 is arranged above the electrical device 2, and a circulation system 4 is arranged on one side of the monitoring mechanism 3. The monitoring mechanism 3 and the circulation system 4 are separated by a partition of the prefabricated box 1.

[0025] A sulfur hexafluoride sensor 301 is arranged above the electrical device 2 , and a controller 302 is arranged on one side of the electrical device 2 . The sulfur hexafluoride sensor 301 monitors the SF6 gas concentration in the substation in real time to ensure that it is within a safe range, and transmits a signal to the controller 302 .

[0026] A display screen 303 is provided on the front of the prefabricated box 1, and the display screen 303 can display real-time data and status information to facilitate operator monitoring.

[0027] An exhaust fan 304 is connected to the bottom card slot inside the partition of the prefabricated box 1, and an audible and visual alarm 305 is arranged on the top of the prefabricated box 1. A signal transmission device 306 is arranged on one side of the audible and visual alarm 305. The exhaust fan 304 discharges harmful gases when the SF6 gas concentration is too high, effectively reducing the concentration of harmful gases and ensuring the safety of personnel. The audible and visual alarm 305 sends out an alarm signal when an abnormal situation is detected, which is easy to attract attention and improve safety. The signal transmission device 306 transmits the substation status information and alarm signals to the remote monitoring center, which is convenient for the staff to deal with the discovered faults in time.

[0028] A ventilation duct 401 is connected to one side of the exhaust fan 304, and the exhaust end of the ventilation duct 401 leads to the outside of the prefabricated box 1. A sulfur hexafluoride sensor 301 is arranged inside the exhaust end of the ventilation duct 401, and a solenoid valve 402 is arranged at the top of the exhaust end of the ventilation duct 401. The SF6 gas concentration in the ventilation duct 401 is monitored by the sulfur hexafluoride sensor 301. When the gas in the ventilation duct 401 is filtered, the controller 302 sends a command to open the solenoid valve 402 to discharge the harmless gas.

[0029] The ventilation duct 401 runs through the adsorbent storage tank 403. A switchable adding port is provided on the outer surface of the adsorbent storage tank 403. SF6 gas can be adsorbed by adding activated carbon or other adsorbent materials into the adsorbent storage tank 403. The adsorbent can be conveniently added and replaced through the adding port.

[0030] An electric heating wire 404 is provided below the adsorbent storage tank 403 . The upper surface and the side surface of the adsorbent storage tank 403 are connected to the circulation pipe 405 . The SF6 absorbed by the adsorbent is heated and then enters the circulation pipe 405 .

[0031] A condenser 406 is provided above the circulation pipe 405, and the gas storage tank 407 is connected to the adsorbent storage tank 403 through the circulation pipe 405. The condenser 406 cools and liquefies the desorbed SF6 gas, and the liquefied gas enters the gas storage tank 407 and is stored, thereby improving the recovery rate of SF6.

[0032] Working principle: First, the pre-installed box 1 is installed at the required location, adsorbent is added to the adsorbent storage tank 403, the internal electrical equipment 2 starts to operate, the sulfur hexafluoride sensor 301 monitors the SF6 gas concentration in the pre-installed box 1, and transmits the relevant information to the controller 302, and the controller 302 displays the information on the display screen 303. Then, when the inflatable switch cabinet or combined electrical appliance fails, SF6 gas leaks, the sulfur hexafluoride sensor 301 detects that the SF6 gas concentration in the pre-installed box 1 increases, and the sulfur hexafluoride sensor 301 sends an alarm signal to the controller 302, and the controller 302 displays the alarm information on the display screen 303. At the same time, the controller 302 issues a command to start the sound and light alarm 305 to sound an alarm, and the signal transmission device Device 306 transmits the alarm signal to the remote monitoring center, and the exhaust fan 304 starts to work to draw SF6 gas into the ventilation duct 401. After the SF6 gas enters the ventilation duct 401, it is adsorbed by the adsorbent in the adsorbent storage tank 403. The heating wire 404 works to heat the adsorbent. After the SF6 is heated and precipitated from the adsorbent, it enters the circulation pipe 405 and is cooled and liquefied by the condenser 406. It then enters the gas storage tank 407 and is collected. The remaining gas enters the circulation pipe 405 from the top of the gas storage tank 407 and is repeatedly filtered. When the sulfur hexafluoride sensor 301 at the top of the ventilation duct 401 detects that the SF6 gas is completely absorbed, it sends a signal to the controller 302. Finally, the controller 302 sends a signal to the solenoid valve 402, and the solenoid valve 402 works to discharge harmless gas.

[0033] The above is only an embodiment of the utility model, and the common sense such as the known specific structure and characteristics in the scheme is not described too much here. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the utility model. Any figure mark in the claims should not be regarded as limiting the claims involved.

Claims

1. A prefabricated substation with monitoring and alarm functions, comprising a prefabricated box (1) and a circulation system (4), characterized in that: The prefabricated box (1) is provided with an electrical device (2) inside, a monitoring mechanism (3) is provided above the electrical device (2), a circulation system (4) is provided on one side of the monitoring mechanism (3), and the monitoring mechanism (3) and the circulation system (4) are separated by a partition of the prefabricated box (1).

2. A prefabricated substation with monitoring and alarm functions according to claim 1, characterized in that: A sulfur hexafluoride sensor (301) is arranged above the electrical device (2), and a controller (302) is arranged on one side of the electrical device (2).

3. The prefabricated substation with monitoring and alarm function according to claim 1 is characterized in that: A display screen (303) is provided on the front of the preassembled box (1).

4. The prefabricated substation with monitoring and alarm function according to claim 1 is characterized in that: An exhaust fan (304) is connected to a slot at the bottom end of the partition of the preassembled box (1), an audible and visual alarm (305) is arranged at the top end of the preassembled box (1), and a signal transmission device (306) is arranged on one side of the audible and visual alarm (305).

5. The prefabricated substation with monitoring and alarm function according to claim 4 is characterized in that: A ventilation duct (401) is connected to one side of the exhaust fan (304); an exhaust end of the ventilation duct (401) leads to the outside of the preassembled box (1); a sulfur hexafluoride sensor (301) is arranged inside the exhaust end of the ventilation duct (401); and a solenoid valve (402) is arranged at the top end of the exhaust end of the ventilation duct (401).

6. The prefabricated substation with monitoring and alarm function according to claim 5 is characterized in that: The ventilation duct (401) passes through the adsorbent storage tank (403), and a switchable adding port is provided on the outer surface of the adsorbent storage tank (403).

7. The prefabricated substation with monitoring and alarm functions according to claim 6 is characterized in that: An electric heating wire (404) is provided below the adsorbent storage tank (403), and the upper surface and side surfaces of the adsorbent storage tank (403) are connected to a circulation pipeline (405).

8. The prefabricated substation with monitoring and alarm functions according to claim 7 is characterized in that: A condenser (406) is disposed above the circulation pipeline (405), and a gas storage tank (407) is connected to the adsorbent storage tank (403) through the circulation pipeline (405).

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