Dynamic air supply device for GIS / GIL (Gas Insulated Switchgear / Gas Insulated Line) equipment

Abstract

The invention relates to the technical field of gas supply of GIS / GIL equipment, and discloses a dynamic gas supply device for GIS / GIL equipment, a rack is provided with a control unit, a pressure gauge unit and a pipeline assembly, the pressure gauge unit is communicated with a pipeline of the pipeline assembly, the bottom of the rack is provided with a detection unit, the detection unit is provided with a gas cylinder, the gas cylinder is communicated with a pipeline of the pipeline assembly, and the gas cylinder is provided with a gas outlet. Protective gas is stored in the gas cylinder, and the control unit controls the gas cylinder to convey the protective gas to the pipeline assembly. After the device is connected with an air supply port of a leakage air chamber, dynamic air supply is performed by measuring the leakage rate, so that the pressure of the air chamber is always kept at a rated value; and the device only needs to be mounted once before power failure treatment, so that the secondary risk caused by mounting gas supply equipment for multiple times in the traditional electrified gas supply is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of gas replenishment for GIS / GIL equipment, and in particular to a dynamic gas replenishment device for GIS / GIL equipment. Background Art

[0002] GIS / GIL equipment belongs to SPV equipment in the equipment composition of nuclear power plants. Once problems occur, it will affect the stability of the unit. In serious cases, it will cause the unit to retreat. At the same time, it will also cause great economic losses to the units participating in the peak load regulation.

[0003] In order to avoid problems with GIS / GIL equipment of nuclear power units under normal operating conditions, major nuclear power plants are currently actively carrying out equipment reliability improvement work. For example, in addition to the existing PM preventive maintenance methods, they are also looking for more advanced condition inspection methods. However, for leakage type failures, they are often emergencies, such as sand holes, welds and aging of rubber rings, etc., and it is almost unrealistic to completely eliminate such failures. According to the structural characteristics of GIS / GIL equipment, the rated pressure of the gas chamber has a certain safety margin. When leakage occurs, it will not directly cause the equipment to fail to operate. If some remedial measures can be taken before the gas leaks to the safety critical value, the risk of shutdown can be avoided. Therefore, the research on live gas replenishment is becoming more and more important in the current operation mode of nuclear power plants.

[0004] At present, although there are some studies on live gas replenishment at home and abroad, they are all from the perspective of being satisfied with solving current problems. For example, when dealing with the problem of leaking gas chambers, the State Grid generally adopts a one-time gas replenishment to a pressure slightly higher than the rated gas chamber pressure, and after maintaining it for a period of time, it repeatedly replenishes gas to the equipment maintenance window. When gas leaks occur in equipment such as GIS / GIL, the general treatment method is to use traditional gas replenishment devices to manually replenish gas with electricity. This gas replenishment method consumes a large amount of manpower costs, and the leaking gas chamber needs to be replenished with electricity multiple times before the power is cut off to deal with the gas leakage defect. Live gas replenishment is affected by the external environment and personnel skills. It is easy to cause equipment tripping during the gas replenishment process, which is not conducive to the stable and reliable operation of the equipment. Summary of the invention

[0005] The purpose of the present invention is to overcome the defects of the prior art and provide a dynamic air replenishment device for GIS / GIL equipment, which is used to improve the timeliness and stability of air replenishment.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A dynamic gas supply device for GIS / GIL equipment comprises a frame, on which a control unit, a pressure gauge unit and a pipeline assembly are arranged, the pressure gauge unit and the pipeline of the pipeline assembly are connected, a detection unit is arranged at the bottom of the frame, a gas cylinder is arranged on the detection unit, the gas cylinder and the pipeline of the pipeline assembly are connected, the gas cylinder stores protective gas, and the control unit controls the gas cylinder to transport the protective gas to the pipeline assembly.

[0008] In some embodiments, the pipeline assembly includes a vacuum pump and an output pipeline, the vacuum pump is connected to the gas cylinder pipeline, and the output pipeline is provided with a plurality of solenoid valves electrically connected to the control unit for controlling the on and off of the pipeline.

[0009] In some embodiments, a micro-water pressure sensor, a pressure reducing valve and a pressure relief valve are provided on the output pipeline.

[0010] In some embodiments, the frame is further provided with a locking structure to fix the gas cylinder, and the locking structure includes a mounting frame, a pressure rod and a locking assembly, and the mounting frame and the pressure rod are fixed by the locking assembly.

[0011] In some embodiments, the mounting bracket has a first arc-shaped opening, and the pressure rod is rotatably connected to one side of the mounting bracket. The inner side of the pressure rod has a second arc-shaped opening, and the gas cylinder is fixed when the first arc-shaped opening and the second arc-shaped opening are closed.

[0012] In some embodiments, the locking assembly includes matching male and female buckles.

[0013] In some embodiments, a heating jacket is further provided on the lower outer side of the gas cylinder, and the heating jacket is electrically connected to the control unit.

[0014] In some embodiments, the control unit includes an electrically connected touch screen, a control host and buttons.

[0015] In some embodiments, the pressure gauge unit includes an SF6 pressure gauge, a vacuum pump negative pressure gauge, a pressure gauge, and a differential pressure gauge.

[0016] In some embodiments, a storage cabinet is provided in front of the rack, and a cabinet door is hinged at the opening of the storage cabinet.

[0017] Compared with the prior art, the dynamic air supply device for GIS / GIL equipment provided by the present invention has the following beneficial effects:

[0018] The present invention measures the leakage rate after being connected to the air supply port of the leaking air chamber to dynamically supply air, so that the air chamber pressure is always maintained at the rated value. In addition, the device only needs to be installed once before power outage processing, reducing the secondary risks introduced by the traditional air supply equipment that is installed multiple times with power on.

[0019] The present invention improves the gas replenishment efficiency and increases the reliability during gas replenishment, and has good applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings required for the technical description.

[0021] Figure 1 A three-dimensional diagram of a dynamic air supply device for GIS / GIL equipment provided by the present invention;

[0022] Figure 2 A schematic diagram of the structure of the gas cylinder provided by the present invention;

[0023] Figure 3 A schematic diagram of the structure of the detection unit provided by the present invention;

[0024] Figure 4 A schematic diagram of the structure of the pipeline assembly provided by the present invention;

[0025] Figure 5 The present invention provides a flow chart of the gas replenishment principle.

[0026] Description of reference numerals:

[0027] 1. Frame; 11. Storage cabinet; 12. Roller; 13. Handle; 2. Control unit; 3. Pressure gauge unit; 4. Pipeline assembly; 41. Vacuum pump; 42. Output pipeline; 5. Gas cylinder; 51. Heating jacket; 6. Locking structure; 61. Mounting frame; 62. Pressure rod; 7. Detection unit. DETAILED DESCRIPTION

[0028] The following is further explained in detail through specific implementation methods.

[0029] like Figures 1 to 4 As shown, the present invention provides a dynamic air supply device for GIS / GIL equipment, including a frame 1, a control unit 2, a pressure gauge unit 3, a pipeline assembly 4, a gas cylinder 5, a locking structure 6 and a detection unit 7. The control unit 2 and the pressure gauge unit 3 are installed on the frame 1, and the pipeline assembly 4 is arranged on the inner side of the frame 1, and the pipeline assembly 4 is connected with the pressure gauge unit 3. The control unit 2 is electrically connected with the pressure gauge unit 3 and the pipeline assembly 4. The control unit 2 controls each valve on the pipeline assembly 4 according to the parameters fed back by the pressure gauge unit 3 to realize the corresponding function. At the same time, the control unit 2 can display the current working status and various parameters of the entire device.

[0030] The control unit 2 includes a touch screen, a control host and buttons. The control host can be set to a PLC, and the buttons can be set to a power button, a vacuum pump on, a vacuum pump pipe, an emergency stop button, a gas replenishment on button and a gas replenishment off button. Through the manual operation of each button, manual gas replenishment operation can be realized, which improves the convenience of operation. A buzzer can also be set to remind the user to perform gas replenishment operation.

[0031] The pressure gauge unit 3 includes a plurality of pressure gauges, such as an SF6 pressure gauge, a vacuum pump negative pressure gauge, a pressure gauge, a differential pressure gauge, etc., which are used to detect various pressure parameters on the output pipeline 42 in real time.

[0032] The pipeline assembly 4 includes a vacuum pump 41 and an output pipeline 42. The vacuum pump 41 is connected to the gas cylinder 5 pipeline, and one end (non-free end) of the output pipeline 42 extends to the outside of the frame 1. A joint can also be provided on the free end of the output pipeline 42, and the joint is, for example, an NPT1 / 4 internal threaded joint. The joint of the output pipeline 42 can not only adapt to GIS and GIL related products at the nuclear power site, but also can be replaced to adapt to products with different structures.

[0033] The free end (inflation end) of the output pipeline 42 has a certain degree of expansibility to meet the requirements of replenishing gas in gas chambers with gas leakage at different positions. The output pipeline 42 is connected with multiple branch pipes, and the branch pipes are connected to the pressure gauge unit 3. The output pipeline 42 is also equipped with multiple solenoid valves electrically connected to the control unit 2. The solenoid valves are used to control the on-off of the pipeline. For example, when it is necessary to replenish gas for the equipment, the control unit 2 opens the solenoid valve to open the output pipeline 42, and the vacuum pump 41 transfers the protective gas inside the gas cylinder 5 to the output pipeline 42, thereby completing the gas replenishment operation for the equipment.

[0034] As an implementable method, a one-way valve is provided on the output pipeline 42 so that when the gas flow direction in the gas pipeline changes, the one-way valve can be automatically closed to prevent the gas from flowing back and avoid damage to the pipeline and equipment.

[0035] As an implementable method, a micro-water pressure sensor, a pressure reducing valve and a pressure relief valve are installed on the output pipeline 42, the pressure reducing valve and the pressure relief valve are arranged on the front side of the frame 1, the micro-water pressure sensor is installed on the inner side of the frame 1, and the pressure reducing valve and the pressure relief valve are used to protect the output pipeline 42.

[0036] Among them, the micro-water pressure sensor and the above-mentioned SF6 pressure gauge are used to detect the gas leakage rate of the equipment connected to this device. When the leakage rate is greater than the threshold, gas replenishment begins to realize dynamic pressure replenishment operation on the equipment, thereby improving the convenience of gas replenishment to the equipment.

[0037] like Figure 2 and Figure 3As shown, a gas cylinder 5 is installed on the rack 1, and the gas cylinder 5 is used to store SF6 gas, so as to facilitate the subsequent gas replenishment operation of the equipment. The gas cylinder 5 is connected to the rack 1 through a locking structure 6, and the gas cylinder 5 can move inside the locking structure 6. A detection unit 7 for measuring the weight of the gas cylinder 5 is provided on the top of the rack 1, and the pressure gauge unit 3 and the detection unit 7 are electrically connected to the control unit 2.

[0038] A heating sleeve 51 is also provided on the lower outer side of the gas cylinder 5, and the heating sleeve 51 is electrically connected to the control unit 2. The heating sleeve 51 can be a heating wire, and the heating sleeve 51 is electrically connected to the control unit 2. By providing the heating sleeve 51, the internal gas of the gas cylinder 5 can be heated and heated to ensure the stable pressure of the inflation gas source, and can overcome the limitation of the harsh low temperature environment for use, thereby improving the applicability.

[0039] The locking structure 6 includes a mounting frame 61, a pressure rod 62 and a lock assembly. The mounting frame 61 is fixed to the back side of the frame 1, and the end surface (i.e. Figure 2 The contact surface of the mounting frame 61 with the gas cylinder 5 has an arc-shaped opening (first arc-shaped opening), and a pressure rod 62 is rotatably connected on one side of the mounting frame 61. The inner side of the pressure rod 62 also has an arc-shaped opening (second arc-shaped opening). The two arc-shaped openings are adapted to be used for sleeve installation of the gas cylinder 5, so that the gas cylinder 5 is restricted on the frame 1. At the same time, the diameter of the circle formed by the two arc-shaped openings is larger than the outer diameter of the gas cylinder 5, so that the cylinder 5 can move up and down on the inner side of the two arc-shaped openings to ensure that the gas cylinder 5 exerts stable pressure on the detection unit 7, thereby improving the accuracy of the detection unit 7 in detecting the weight of the gas cylinder 5, and also facilitating the user to replace the new gas cylinder 5 in time.

[0040] As an implementable manner, the pressure rod 62 and the mounting frame 61 are fixed by a locking assembly. The locking assembly includes a male buckle and a female buckle, and the convenience of disassembly and fixing of the pressure rod 62 is realized by the locking assembly, so as to improve the convenience of operation of the device.

[0041] The detection unit 7 is a pressure sensor, which is installed at the rear bottom of the frame 1 and the top of the pressure sensor is in contact with the bottom of the gas cylinder 5 .

[0042] As an implementable manner, in order to enhance the applicability of the device, a storage cabinet 11 is provided in front of the rack 1 , and a cabinet door is hinged at the opening of the storage cabinet 11 .

[0043] In consideration of convenient movement and installation of the device, two rollers 12 are rotatably connected to the bottom of the front side of the frame 1 , and at least one handle 13 is fixedly installed in front of the frame 1 .

[0044] like Figure 5As shown, the present invention adopts a 40L steel cylinder (i.e., the gas cylinder 5 is a 40L steel cylinder), the 40L steel cylinder is arranged on the weight sensor, and the 40L steel cylinder is provided with a heat transfer belt. The pipeline is connected to the 40L steel cylinder, and the pipeline is provided with a 5Mpa pressure gauge, a pressure reducing valve, a 1.6MPa pressure gauge, a parallel No. 3 electric switch valve (including a one-way valve) and a No. 1 manual switch valve, a 1.6MPa pressure gauge, a dew point sensor, a hose, a No. 2 manual switch valve, and a quick connector. There are also two branches, one branch is arranged with a No. 1 electric switch valve, a No. 3 manual switch valve, and a discarded bottle, and the other branch is arranged with a No. 2 electric switch valve, a vacuum pressure gauge, and a vacuum pump. The computer is connected to the PLC, and the PLC connects and controls the heating belt, the No. 1 electric switch valve, the No. 2 electric switch valve, the vacuum pump, and the No. 3 electric switch valve; the computer is connected to the 5Mpa pressure gauge, the 1.6MPa pressure gauge, the dew point sensor, and receives relevant data.

[0045] In summary, this device integrates devices such as gas cylinder heating and gas cylinder weighing to ensure the stability of the inflation gas source pressure, and monitors the weight of the gas cylinder in real time, so that the technicians can replace the new gas cylinder in time. This device can calculate the corresponding leakage rate through the relevant data measured by the micro-water pressure sensor and the SF6 pressure gauge, and dynamically replenish the leaking gas chamber through the control unit to control the solenoid valve to make the leaking gas chamber always maintain the rated pressure operation, and the gas replenishment rate is slow and adjustable. After the device is connected to the gas replenishment port of the leaking gas chamber, it measures the leakage rate to dynamically replenish gas, so that the gas chamber pressure is always maintained at the rated value; and this device only needs to be installed once before the power outage, which reduces the secondary risks introduced by the traditional live gas replenishment and multiple installation of gas replenishment equipment. This device not only improves the gas replenishment efficiency but also increases the reliability of gas replenishment. It can also be extended to other power plants, power grids, etc., and has good applicability.

[0046] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A dynamic air supply device for GIS / GIL equipment, characterized in that: The invention comprises a frame (1), wherein a control unit (2), a pressure gauge unit (3) and a pipeline assembly (4) are arranged on the frame (1), wherein the pressure gauge unit (3) and the pipeline of the pipeline assembly (4) are connected, wherein a detection unit (7) is arranged at the bottom of the frame (1), wherein a gas cylinder (5) is arranged on the detection unit (7), wherein the pipeline of the gas cylinder (5) and the pipeline of the pipeline assembly (4) are connected, wherein the gas cylinder (5) stores protective gas, and wherein the control unit (2) controls the gas cylinder (5) to transport the protective gas to the pipeline assembly (4).

2. The dynamic air supply device for GIS / GIL equipment according to claim 1, characterized in that: The pipeline assembly (4) comprises a vacuum pump (41) and an output pipeline (42), wherein the vacuum pump (41) is connected to the pipeline of the gas cylinder (5), and the output pipeline (42) is provided with a plurality of solenoid valves electrically connected to the control unit (2) for controlling the on and off of the pipeline.

3. The dynamic air supply device for GIS / GIL equipment according to claim 2, characterized in that: The output pipeline (42) is provided with a micro-water pressure sensor, a pressure reducing valve and a pressure relief valve.

4. The dynamic air supply device for GIS / GIL equipment according to claim 1, characterized in that: The frame (1) is also provided with a locking structure (6) for fixing the gas cylinder (5); the locking structure (6) comprises a mounting frame (61), a pressure rod (62) and a locking assembly; the mounting frame (61) and the pressure rod (62) are fixed by the locking assembly.

5. The dynamic air supply device for GIS / GIL equipment according to claim 4, characterized in that: The mounting frame (61) has a first arc-shaped opening, and the pressure rod (62) is rotatably connected to one side of the mounting frame (61). The inner side of the pressure rod (62) has a second arc-shaped opening, and the gas cylinder (5) is fixed when the first arc-shaped opening and the second arc-shaped opening are closed.

6. The dynamic air supply device for GIS / GIL equipment according to claim 4 or 5, characterized in that: The locking buckle assembly includes a matching male buckle and a female buckle.

7. The dynamic air supply device for GIS / GIL equipment according to claim 1, characterized in that: A heating sleeve (51) is also provided on the lower outer side of the gas cylinder (5), and the heating sleeve (51) is electrically connected to the control unit (2).

8. The dynamic air supply device for GIS / GIL equipment according to claim 1, characterized in that: The control unit (2) comprises an electrically connected touch screen, a control host and buttons.

9. The dynamic air supply device for GIS / GIL equipment according to claim 1, characterized in that: The pressure gauge unit (3) comprises an SF6 pressure gauge, a vacuum pump negative pressure gauge, a pressure gauge, and a differential pressure gauge.

10. The dynamic air supply device for GIS / GIL equipment according to claim 1, characterized in that: A storage cabinet (11) is provided in front of the frame (1), and a cabinet door is hinged at the opening of the storage cabinet (11).

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