A dynamic gas supplement device for GIS / GIL equipment

Abstract

The present application relates to GIS / GIL equipment air supplement technical field, disclose a kind of for GIS / GIL equipment dynamic air supplement device, rack is equipped with control unit, pressure gauge unit and pipeline assembly, the pipeline of pressure gauge unit and pipeline assembly is communicated, the bottom of rack is equipped with detection unit, detection unit is equipped with gas cylinder, the pipeline of gas cylinder and pipeline assembly is communicated, gas cylinder stores protective gas, control unit controls gas cylinder and transports protective gas to pipeline assembly.The present application is connected with leakage air chamber air supplement opening, dynamic air supplement is carried out by measuring leakage rate, so that air chamber pressure is always maintained at rated value;And the device only needs to be installed once before power failure processing, reduces the secondary risk introduced by the multiple installation of traditional live air supplement air supplement equipment.

Description

Technical Field

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

[0002] GIS / GIL equipment is a type of SPV equipment in nuclear power plant equipment. Problems with it can affect the stability of the unit, and in severe cases, it can lead to the unit's downgrade. It can also cause significant economic losses to units that participate in peak shaving.

[0003] To avoid problems with GIS / GIL equipment in nuclear power units under normal operating conditions, major nuclear power plants are actively carrying out equipment reliability improvement work. For example, in addition to existing PM preventive maintenance methods, they are also looking for more advanced condition-based maintenance methods. However, gas leakage is often an unexpected situation, such as pinholes, weld seams, and aging of rubber rings. Completely eliminating such faults is almost unrealistic. According to the structural characteristics of GIS / GIL equipment, the rated pressure of the gas chamber has a certain safety margin. Gas leakage will not directly cause the equipment to stop operating. If remedial measures can be taken before the gas leaks to the safety threshold, the risk of shutdown can be avoided. Therefore, research on live gas injection is becoming increasingly important in the current operating mode of nuclear power plants.

[0004] Currently, while there is some research on live gas replenishment both domestically and internationally, it primarily focuses on addressing immediate problems. For instance, when dealing with leaking gas chambers, the State Grid typically replenishes gas to a pressure slightly above the rated chamber pressure in a single cycle, maintains this pressure for a period, and then repeats the process until the equipment is ready for maintenance. When gas leaks occur in GIS / GIL equipment, the common method is to manually replenish gas under energized conditions using traditional gas replenishment devices. This method is labor-intensive, requires multiple live gas replenishments before power is cut off to address the leak, and is susceptible to external environmental factors and personnel skill levels. Live gas replenishment can easily cause equipment tripping during the process, which is detrimental to the stable and reliable operation of the equipment. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a dynamic gas replenishment device for GIS / GIL equipment, which improves the timeliness and stability of gas replenishment.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A dynamic gas replenishment device for GIS / GIL equipment includes a frame, on which a control unit, a pressure gauge unit, and a pipeline assembly are mounted. The pressure gauge unit and the pipeline assembly are connected by a pipeline. A detection unit is located at the bottom of the frame, and a gas cylinder is mounted on the detection unit. The gas cylinder and the pipeline assembly are connected by a pipeline. The gas cylinder stores protective gas. The control unit controls the gas cylinder to deliver protective gas to the pipeline assembly.

[0008] In some embodiments, the piping 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 / off state of the pipeline.

[0009] In some embodiments, the output pipeline is equipped with a micro water pressure sensor, a pressure reducing valve, and a pressure relief valve.

[0010] In some embodiments, the frame is further provided with a locking structure to secure the gas cylinder. The locking structure includes a mounting bracket, a pressure bar, and a locking assembly, wherein the mounting bracket and the pressure bar are secured 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 an adapted male and female buckle.

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

[0014] In some embodiments, the control unit includes an electrically connected touchscreen, 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 frame, and the opening of the storage cabinet is hinged with a cabinet door.

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

[0018] This invention connects to the gas supply port of the leaking gas chamber and dynamically replenishes gas by measuring the leakage rate, ensuring that the gas chamber pressure remains at the rated value. Furthermore, this device only requires installation once before a power outage, reducing the secondary risks introduced by the multiple installations of traditional live gas supply equipment.

[0019] This invention improves the efficiency of Qi replenishment and increases the reliability of Qi replenishment, making it highly applicable. Attached Figure Description

[0020] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the technical description will be briefly introduced below.

[0021] Figure 1 A perspective view of the dynamic air replenishment device for GIS / GIL equipment provided by the present invention;

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

[0023] Figure 3 This is a schematic diagram of the detection unit provided by the present invention;

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

[0025] Figure 5 A flowchart illustrating the principle of Qi replenishment provided by this invention.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Frame; 11. Locker; 12. Casters; 13. Handle; 2. Control unit; 3. Pressure gauge unit; 4. Piping assembly; 41. Vacuum pump; 42. Output pipeline; 5. Gas cylinder; 51. Heating jacket; 6. Locking structure; 61. Mounting bracket; 62. Pressure bar; 7. Detection unit. Detailed Implementation

[0028] The following detailed description provides further details on specific implementation methods.

[0029] like Figures 1 to 4 As shown, this invention provides a dynamic gas replenishment device for GIS / GIL equipment, including a frame 1, a control unit 2, a pressure gauge unit 3, a piping 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 mounted on the frame 1. The piping assembly 4 is located inside the frame 1 and is connected to the pressure gauge unit 3 via piping. The control unit 2 is electrically connected to the pressure gauge unit 3 and the piping assembly 4. The control unit 2 controls the valves on the piping assembly 4 to perform corresponding functions based on the parameters fed back from the pressure gauge unit 3. Simultaneously, the control unit 2 can also display the current operating status and various parameters of the entire device.

[0030] Control unit 2 includes a touch screen, a control host, and buttons. The control host can be configured as a PLC, and the buttons can be configured as a power button, vacuum pump on, vacuum pump off, emergency stop button, gas replenishment on button, and gas replenishment off button. Manual gas replenishment can be performed through the manual operation of each button, improving the ease of operation. A buzzer can also be set to remind the user to perform gas replenishment.

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

[0032] Piping assembly 4 includes a vacuum pump 41 and an output pipe 42. The vacuum pump 41 is connected to the gas cylinder 5 via piping, and one end (the non-free end) of the output pipe 42 extends to the outside of the frame 1. A connector, such as an NPT1 / 4 internal thread connector, can also be installed on the free end of the output pipe 42. The connector of the output pipe 42 is compatible not only with GIS and GIL-related products in nuclear power plants, but also allows for connector replacement to accommodate products with different structures.

[0033] The free end (filling end) of the output pipeline 42 has a certain degree of expandability to accommodate the gas replenishment requirements of gas chambers leaking in different locations. Multiple branch pipes are connected to the output pipeline 42, and these branch pipes are connected to the pressure gauge unit 3. Multiple solenoid valves electrically connected to the control unit 2 are also installed on the output pipeline 42. These solenoid valves control the opening and closing of the pipeline. For example, when gas replenishment is required, the control unit 2 opens the solenoid valves to open the output pipeline 42, and the vacuum pump 41 transfers the protective gas inside the gas cylinder 5 into the output pipeline 42, thus completing the gas replenishment operation for the equipment.

[0034] As an feasible approach, a check valve is installed on the output line 42 so that when the gas flow direction in the gas line changes, the check valve can automatically close to prevent gas backflow and avoid damage to the line and equipment.

[0035] As one feasible approach, 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 located on the front side of the frame 1, and the micro water pressure sensor is installed on the inner side of the frame 1. 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 aforementioned 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 is started to realize dynamic pressure replenishment operation of the equipment and improve the convenience of gas replenishment.

[0037] like Figure 2 and Figure 3As shown, gas cylinder 5 is installed on frame 1. Gas cylinder 5 is used to store SF6 gas for subsequent gas replenishment to the equipment. Gas cylinder 5 is connected to frame 1 via locking structure 6, and gas cylinder 5 can move inside the locking structure 6. A detection unit 7 for weighing gas cylinder 5 is provided on the top of frame 1. Pressure gauge unit 3 and detection unit 7 are electrically connected to control unit 2.

[0038] A heating jacket 51 is also provided on the lower outer side of the gas cylinder 5, and the heating jacket 51 is electrically connected to the control unit 2. The heating jacket 51 can be made of heating wire. The heating jacket 51 is electrically connected to the control unit 2. By setting the heating jacket 51, the internal gas of the gas cylinder 5 can be heated to ensure the stable pressure of the filling gas source, and can overcome the limitations of harsh low temperature environments, thus improving its applicability.

[0039] The locking structure 6 includes a mounting bracket 61, a pressure bar 62, and a locking assembly. The mounting bracket 61 is fixed to the back side of the frame 1, and the end face of the mounting bracket 61 (i.e. Figure 2 The mounting bracket 61 (the contact surface with the gas cylinder 5) has an arc-shaped opening (first arc-shaped opening). A pressure rod 62 is rotatably connected to one side of the mounting bracket 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 matched to fit 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 gas cylinder 5 can move up and down inside the two arc-shaped openings to ensure that the gas cylinder 5 applies stable pressure to the detection unit 7, improves the accuracy of the detection unit 7 in detecting the weight of the gas cylinder 5, and also facilitates the user to replace the gas cylinder 5 in a timely manner.

[0040] As one feasible approach, the pressure bar 62 and the mounting bracket 61 are secured together by a locking assembly. The locking assembly includes a male and a female latch, which facilitates the disassembly and securing of the pressure bar 62, thereby improving the ease of operation of the equipment.

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

[0042] As an feasible approach, to enhance the applicability of the equipment, 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.

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

[0044] like Figure 5As shown, this invention uses a 40L steel cylinder (i.e., gas cylinder 5 is a 40L steel cylinder). The 40L steel cylinder is mounted on the weight sensor and is equipped with a heat transfer cable. The pipeline connects to the 40L steel cylinder and sequentially includes a 5MPa pressure gauge, a pressure reducing valve, a 1.6MPa pressure gauge, a parallel No. 3 electric switch valve (including a check valve), 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. Two branch lines are also provided: one branch line includes the No. 1 electric switch valve, the No. 3 manual switch valve, and a waste bottle; the other branch line includes the No. 2 electric switch valve, a vacuum pressure gauge, and a vacuum pump. A computer is connected to a PLC, which connects to and controls the heating cable, the No. 1 and No. 2 electric switch valves, the vacuum pump, and the No. 3 electric switch valve; the computer is also connected to the 5MPa and 1.6MPa pressure gauges and the dew point sensor, and receives relevant data.

[0045] In summary, this device integrates cylinder heating and weighing mechanisms to ensure stable filling gas pressure and monitor cylinder weight in real time, facilitating timely cylinder replacement by technicians. The device calculates the leakage rate based on data measured by a micro-water pressure sensor and an SF6 pressure gauge. A control unit then regulates a solenoid valve to dynamically replenish the leaking chamber, maintaining it at its rated pressure. The replenishment rate is slow and adjustable. Connected to the leaking chamber's replenishment port, the device dynamically replenishes gas based on the leakage rate, ensuring the chamber pressure remains at its rated value. Furthermore, this device only requires one installation before power outages, reducing the secondary risks associated with multiple installations of traditional live gas replenishment equipment. This device not only improves replenishment efficiency but also increases reliability, making it suitable for use in other power plants and power grids, demonstrating excellent applicability.

[0046] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A dynamic gas replenishment device for GIS / GIL equipment, characterized in that, The device includes a frame (1), on which a control unit (2), a pressure gauge unit (3), and a pipeline assembly (4) are provided. The pressure gauge unit (3) and the pipeline assembly (4) are connected by a pipeline. A detection unit (7) is provided at the bottom of the frame (1). A gas cylinder (5) is provided on the detection unit (7). The gas cylinder (5) and the pipeline assembly (4) are connected by a pipeline. The gas cylinder (5) stores protective gas. The control unit (2) controls the gas cylinder (5) to deliver protective gas to the pipeline assembly (4). 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. The output pipeline (42) is provided with a plurality of solenoid valves electrically connected to the control unit (2) for controlling the opening and closing of the pipeline. The output pipeline (42) is provided with a micro water pressure sensor, a pressure reducing valve and a pressure relief valve. The pressure gauge unit (3) includes an SF6 pressure gauge, a vacuum pump negative pressure gauge, and a differential pressure gauge. The corresponding leakage rate is calculated by measuring relevant data through the micro water pressure sensor and the SF6 pressure gauge. The control unit (2) controls and adjusts the solenoid valve to dynamically replenish the leakage chamber, so that the leakage chamber always operates at the rated pressure.

2. The dynamic gas replenishment device for GIS / GIL equipment according to claim 1, characterized in that, The frame (1) is also provided with a locking structure (6) to fix the gas cylinder (5). The locking structure (6) includes a mounting bracket (61), a pressure rod (62) and a locking assembly. The mounting bracket (61) and the pressure rod (62) are fixed by the locking assembly.

3. The dynamic gas replenishment device for GIS / GIL equipment according to claim 2, characterized in that, The mounting bracket (61) has a first arc-shaped opening, and the pressure rod (62) is rotatably connected to one side of the mounting bracket (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.

4. The dynamic gas replenishment device for GIS / GIL equipment according to claim 2 or 3, characterized in that, The locking assembly includes a matching male and female buckle.

5. The dynamic gas replenishment 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).

6. The dynamic gas replenishment device for GIS / GIL equipment according to claim 1, characterized in that, The control unit (2) includes an electrically connected touch screen, control host and buttons.

7. The dynamic gas replenishment 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).

Images