A training facility for live leak sealing and ice plugging skills in nuclear power plants

Abstract

This utility model discloses a training facility for live leak sealing and ice blockage skills in nuclear power plants, relating to the field of pipeline maintenance training equipment. It includes a first line component, and a second and third line components connected in parallel to the first line component. The first line component fills the second and third line components with liquid. The second line component includes a main pipeline, a training pipeline connected to the main pipeline, and an ice-making device. This device fills the gap in current live leak sealing and ice blockage skills training facilities. The glass blind flange design allows trainees to directly observe the ice blockage formation process. This intuitive learning method deepens their understanding of the relevant principles and technologies, improving learning efficiency and effectiveness. The second shut-off valve and pressure gauge provide pre-protection for the training pipeline, preventing pipeline rupture due to excessive liquid pressure during training.

Description

Technical Field

[0001] This utility model relates to the field of pipeline maintenance training equipment, and in particular to a training facility for live leak sealing and ice plugging skills in nuclear power plants. Background Technology

[0002] Practical experience with live pipeline leak sealing and ice plugging technologies provides solutions for handling equipment problems without shutting down the system. Live leak sealing refers to emergency repairs of external leaks after a unit or equipment failure, without shutting down the system or equipment, using methods such as caulking or adhesive injection while maintaining normal operating pressure and temperature. Fundamental repairs are then carried out when a maintenance window is available, ensuring the economic efficiency of unit operation. Ice plugging refers to technologies such as electric ice plugs, carbon dioxide ice plugs, and liquid nitrogen ice plugs used to cryogenically freeze the liquid inside the pipeline, forming an isolation barrier that allows for disassembly and maintenance of downstream equipment.

[0003] Because ice plugging and live leak sealing are not routine maintenance techniques for nuclear power units, operators cannot maintain their skill level through frequent operation, or lack the technical assurance required for upcoming ice plugging or live leak sealing work. This can lead to personnel injuries or equipment damage when ice plugging or live leak sealing is required in nuclear power units. To effectively improve the reliability of ice plugging and live leak sealing in nuclear power plants, it is necessary to establish ice plugging and live leak sealing skills training rooms to conduct skills training for operators and process verification before implementation of relevant tasks, ensuring that personnel skill levels and operating procedures meet the requirements. Utility Model Content

[0004] Therefore, the technical problem to be solved by this utility model is that: at present, there is a lack of training facilities for maintenance personnel on live leak sealing and ice plugging skills, as well as a lack of process verification before implementation.

[0005] The above-mentioned technical problems are solved by the following technical solution: This utility model proposes a training facility for pressurized leak sealing and ice plugging skills in nuclear power plants, including a first circuit component, and a second circuit component and a third circuit component connected in parallel on the first circuit component. The first circuit component fills the second circuit component and the third circuit component with liquid respectively. The second circuit component includes a main pipeline, a training pipeline connected to the main pipeline, and an ice-making device. The training pipeline includes a first replacement pipe and a glass blind plate arranged sequentially and connected along the liquid flow direction. The output end of the ice-making device is routed around the first replacement pipe and can continuously cool the liquid in the training pipeline to form an ice plug. The second circuit component and the third circuit component have the same structure.

[0006] In a preferred embodiment of the nuclear power plant pressurized leak sealing and ice plugging skills training facility of this utility model: the main pipeline is provided with a first shut-off valve; the training pipeline also includes a first installation pipe connected to the main pipeline at the front end of the first shut-off valve.

[0007] In a preferred embodiment of the nuclear power plant pressurized leak sealing and ice plugging skills training facility of this utility model: the first installation pipe is provided with a second shut-off valve and a pressure gauge in sequence along the liquid flow direction, and the first installation pipe is connected to the first replacement pipe through a flange.

[0008] In a preferred embodiment of the nuclear power plant pressurized leak sealing and ice plugging skills training facility of this utility model: the training pipeline further includes a second replacement pipe and a second installation pipe arranged sequentially at the water outlet end of the glass blind plate along the liquid flow direction, and the second replacement pipe is connected to the second installation pipe through a flange.

[0009] In a preferred embodiment of the nuclear power plant pressurized leak sealing and ice plugging skills training facility of this utility model: the first line component includes a main pipe and a pressurization device; wherein, the main pipeline is connected to the main pipe, and the main pipe is provided with a pressurization port and a water inlet; the pressurization port is connected to the output end of the pressurization device, and a third shut-off valve is provided on the pressurization port.

[0010] In a preferred embodiment of the nuclear power plant pressurized leak sealing and ice plugging skills training facility of this utility model: a fourth shut-off valve is provided on the second installation pipe.

[0011] In a preferred embodiment of the nuclear power plant pressurized leak sealing and ice plugging skills training facility of this utility model: a drill hole is opened on the second installation pipe to simulate a leak point, and the drill hole is sealed by a plugging block.

[0012] In a preferred embodiment of the nuclear power plant pressurized leak sealing and ice plugging skills training facility of this utility model: the drill hole opening on the second installation pipe faces the ground, and a water receiving device for receiving leaked liquid is provided directly below the drill hole.

[0013] In a preferred embodiment of the nuclear power plant pressurized leak sealing and ice plugging skills training facility of this utility model: a water inlet pipe is connected between the water receiving equipment and the main pipeline.

[0014] In a preferred embodiment of the nuclear power plant pressurized leak sealing and ice plugging skills training facility of this utility model: a fifth shut-off valve is provided on the water inlet pipe.

[0015] The beneficial effects of this utility model are as follows: This device makes up for the lack of current training facilities for pressurized leak sealing and ice plugging skills. The design of the glass blind plate in this device allows trainees to directly observe the process of ice plug formation. This intuitive learning method can deepen their understanding of the relevant principles and technologies, and improve learning efficiency and effectiveness. The second shut-off valve and pressure gauge can provide pre-protection for the training pipeline to prevent the pipeline from bursting and breaking due to excessive liquid pressure during the training process. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments of this utility model will be briefly described below. Obviously, the drawings described below only relate to some embodiments of this utility model and are not intended to limit the scope of this utility model. Wherein:

[0017] Figure 1 This diagram shows the connection structure between the first circuit component, the second circuit component, and the third circuit component of this utility model.

[0018] Figure 2 A schematic diagram of the specific structure of this utility model is shown;

[0019] Figure 3 A schematic diagram of the training pipeline and its connecting components in this utility model is shown.

[0020] Figure 4 The diagram shows the connection structure of the first replacement tube, the glass blind plate, and the second replacement tube in this utility model. Detailed Implementation

[0021] To enable those skilled in the art to better understand this utility model, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0022] The terminology used in this invention refers to those general terms currently widely used in the art in consideration of the functionality of this invention; however, these terms may vary according to the intent, precedent, or new technology of those skilled in the art. Furthermore, specific terms may be chosen by the applicant, and in such cases, their detailed meanings will be described in the detailed description of this invention. Therefore, the terminology used in this specification should not be construed as simple names, but rather based on the meaning of the terms and the overall description of this invention.

[0023] Reference Figures 1-4This embodiment provides a training facility for live leak sealing and ice plugging skills in nuclear power plants, including a first circuit component 1, and a second circuit component 2 and a third circuit component 3 connected in parallel to the first circuit component 1. The second circuit component 2 and the third circuit component 3 are used for practical training of maintenance personnel in live leak sealing and ice plugging skills. The structures of the second circuit component 2 and the third circuit component 3 are completely identical, and the first circuit component 1 can fill the second circuit component 2 and the third circuit component 3 with liquid respectively. It is worth noting that during the actual construction of this device, a fourth circuit component, a fifth circuit component, and an Nth circuit component with a completely identical structure to the second circuit component 2 can be added according to the number of trainees or the load-bearing capacity of the first circuit component 1.

[0024] Specifically, the second circuit component 2 includes a main pipeline 21, a training pipeline 22 connected to the main pipeline 21, and an ice-making device. The training pipeline 22 includes a first replacement pipe 221 and a glass blind plate 222 arranged sequentially and connected along the liquid flow direction. The glass blind plate 222 has a flow channel 222a inside for liquid to flow and connected to the first replacement pipe 221. The output end of the ice-making device bypasses the first replacement pipe 221 and can continuously cool the liquid in the training pipeline 22 to form an ice block. By setting the glass blind plate 222, the transparency of the glass can help trainees clearly observe the ice block formation process and deepen their understanding of the ice block formation principle and process.

[0025] Specifically, the ice-making device is a mass of dry ice that is wrapped around the outer surface of the first replacement tube 221 to continuously cool the liquid inside the tube and form an ice plug. Furthermore, the ice-making device can also be a liquid nitrogen injector, which has a spray section that spirals around the outside of the first replacement tube 221 and has spray nozzles arranged perpendicular to the first replacement tube 221 on the spray section, which can uniformly spray liquid nitrogen onto the outer circumference of the first replacement tube 221, thereby continuously cooling the liquid inside the tube and forming an ice plug.

[0026] In some embodiments, the main pipeline 21 is provided with a first shut-off valve 23 for controlling the flow of liquid in the main pipeline 21.

[0027] In some embodiments, the training pipeline 22 further includes a first installation pipe 223 connected to the main pipeline 21 upstream of the first shut-off valve 23. The first installation pipe 223 is sequentially equipped with a second shut-off valve 24 and a pressure gauge 25 along the liquid flow direction, and is connected to the first replacement pipe 221 via a flange. The first installation pipe 223, located upstream of the first replacement pipe 221, provides pre-emptive protection for the first replacement pipe 221. The second shut-off valve 24 controls the flow of liquid within the first installation pipe 223, regulating the liquid pressure entering the first replacement pipe 221. In conjunction with the pressure gauge 25, it detects the liquid pressure to prevent excessive pressure from damaging the first replacement pipe 221.

[0028] Furthermore, the first replacement pipe 221 is equipped with an exhaust head with a shut-off valve, which is used to discharge the gas in the first replacement pipe 221 when liquid enters the first replacement pipe 221, so as to ensure that the liquid can be normally filled into the first replacement pipe 221 and the pipes connected thereafter.

[0029] In some embodiments, the training pipeline 22 further includes a second replacement pipe 224 and a second installation pipe 225 disposed at the water outlet end of the glass blind plate 222 and arranged sequentially along the liquid flow direction, wherein the second replacement pipe 224 is connected to the second installation pipe 225 via a flange.

[0030] In some embodiments, a fourth shut-off valve 26 is provided on the second mounting pipe 225. A drilled hole 225a is formed on the second mounting pipe 225 to simulate a leak point, and the drilled hole 225a is sealed with a plug. It is worth noting that the drilled hole 225a is typically located on the second mounting pipe 225 at the rear end of the fourth shut-off valve 26. Since the fourth shut-off valve serves as the valve at the end of the liquid flow in the training pipeline 22, placing the drilled hole 225a at the rear end of the fourth shut-off valve 26 ensures that when the fourth shut-off valve is closed, the liquid in the training pipeline 22 will not leak due to the drilled hole 225a not being sealed or not being sealed tightly, thus preventing incomplete ice plug formation caused by insufficient water in the training pipeline 22.

[0031] In some embodiments, the first line component 1 includes a main pipe 11 and a pressure-pressurizing device; wherein, the main pipeline 21 is connected to the main pipe 11, and the main pipe 11 is provided with a pressure-pressurizing port 111 and a water inlet 112; the water inlet 112 serves as the liquid inlet of the main pipe 11 and is connected to a liquid supply device (such as a water tank, water supply pipe, etc.); the pressure-pressurizing port 111 is connected to the output end of the pressure-pressurizing device, which is an air compressor or a pressure-pressurizing pump, capable of pressurizing the liquid flowing in the main pipe 11 and the main pipeline 21; and a third shut-off valve 12 is provided on the pressure-pressurizing port 111. It is worth noting that there are multiple pressure-pressurizing ports 111 on the main pipe 11, which are usually located near the main pipeline 21, in order to quickly pressurize the liquid flowing in the main pipeline 21; the third shut-off valve 12 is used to close the pressure-pressurizing port 111 not connected to the pressure-pressurizing device, and to close the pressure-pressurizing port 111 connected to the pressure-pressurizing device when the pressure-pressurizing device is not working, to prevent the main pipe 11 from depressurizing due to the opening of the pressure-pressurizing port 111.

[0032] In some embodiments, the opening of the borehole 225a in the second mounting pipe 225 faces the ground, and a water receiving device 27 for receiving leakage is located directly below the borehole 225a. A water inlet pipe 28 connects the water receiving device 27 to the main pipeline 21. A fifth shut-off valve 29 is installed on the water inlet pipe 28. Figure 2 As shown, the water receiving device 27 is a funnel. At this time, the second installation pipe 225 should be set higher than the main pipeline 21, and there is no path for the liquid to flow upward in the water inlet pipe 28, so as to ensure that after the fifth shut-off valve 29 is opened, the liquid leaking from the drill hole 225a caught by the funnel can flow directly into the main pipeline 21 through the water inlet pipe 28 and then be discharged under the action of gravity.

[0033] In summary, the specific operating steps of this device are as follows:

[0034] Initially, all components of this device, including the refrigeration equipment, the pressurization equipment, and all shut-off valves, are closed.

[0035] Open the first shut-off valve 23 and inject liquid into the main pipe 11 through the inlet 112. The liquid flows along the main pipe 11 and enters the main pipeline 21.

[0036] Observe the size and flow rate of the liquid flowing out of the drain outlet of the main pipe 21 to make a preliminary judgment on the liquid pressure flowing in the main pipe 11 and the main pipe 21.

[0037] If the pressure is too low, open the third shut-off valve 12 and the pressurization device to pressurize the liquid flowing in the main pipe 11 and the main pipeline 21, and start the pressurized leak plugging or ice plugging skills training after the liquid pressure flowing in the main pipe 11 and the main pipeline 21 has stabilized.

[0038] During live leak sealing training, first close the first shut-off valve 23, and then open the second shut-off valve 24 and the fourth shut-off valve 26 in sequence to allow liquid to enter the training pipeline 22 from the main pipeline 21. It is important to note that when the second shut-off valve 24 is initially opened, it should not be opened too wide to prevent a large amount of liquid from entering the first replacement pipe 221 at once, which could cause excessive pressure in the first replacement pipe 221 and damage it. In actual operation, the second shut-off valve 24 should be opened slowly, and the pressure gauge 25 should be observed at all times. The pressure should gradually increase and stabilize as the liquid flows through the first replacement pipe 221, the glass blind plate 222, and the second replacement pipe 224. After the pressure stabilizes, open the plug on the drill hole 225a. The drill hole 225a serves as a simulated leak point for trainees to conduct practical training on live leak sealing.

[0039] It is worth noting that during live leak sealing training, the fifth shut-off valve is opened, allowing the leaking liquid from borehole 225a received by water receiving equipment 27 to flow into the main pipeline 21 through water inlet pipe 28 and then be discharged.

[0040] During ice plugging skills training, first close the first shut-off valve 23, then open the second shut-off valve 24 while keeping the fourth shut-off valve 26 closed. Similarly, when initially opening the second shut-off valve 24, do not open it too wide; open it slowly and always observe the pressure gauge 25. As the liquid flows through the first replacement tube 221, glass blind plate 222, and second replacement tube 224, the pressure gradually increases and tends to stabilize. Since the fourth shut-off valve 26 is closed, the liquid will fill the first replacement tube 221, glass blind plate 222, and second replacement tube 224.

[0041] When the first replacement tube 221, glass blind plate 222, and second replacement tube 224 are filled, the second shut-off valve 24 is closed, and the refrigeration equipment is turned on to continuously cool the liquid in the training tube 22 to form an ice block. The glass blind plate 222 is transparent, which helps trainees to clearly observe the ice block formation process and deepen their understanding of the ice block formation principle and process.

[0042] It is worth noting that during live leak sealing training, the shut-off valve on the vent head connected to the first replacement pipe 221 should be kept closed; while during ice plugging skills training, the shut-off valve on the vent head connected to the first replacement pipe 221 should be kept open first, so that the gas in the first replacement pipe 221, glass blind plate 222, and second replacement pipe 224 can be discharged through the vent head, ensuring that liquid can fill and fill the first replacement pipe 221, glass blind plate 222, and second replacement pipe 224, and the shut-off valve on the vent head should be closed after filling.

[0043] Finally, it should be noted that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways as long as they do not depart from the scope of this utility model.

Claims

1. A training facility for live leak sealing and ice plugging skills in nuclear power plants, characterized in that: include, A first circuit component (1), and a second circuit component (2) and a third circuit component (3) connected in parallel on the first circuit component (1), wherein the first circuit component (1) fills the second circuit component (2) and the third circuit component (3) with liquid respectively; The second line component (2) includes a main pipeline (21), a training pipeline (22) connected to the main pipeline (21), and an ice-making device; The training pipeline (22) includes a first replacement pipe (221) and a glass blind plate (222) arranged and connected in sequence along the liquid flow direction. The output end of the ice-making equipment is routed around the first replacement pipe (221) and can continuously cool the liquid in the training pipeline (22) to form an ice plug. The second line component (2) and the third line component (3) have the same structure.

2. The nuclear power plant pressurized leak sealing and ice plugging skills training facility as described in claim 1, characterized in that: The main pipeline (21) is equipped with a first shut-off valve (23); The training pipeline (22) also includes a first installation pipe (223) connected to the main pipeline (21) at the front end of the first shut-off valve (23).

3. The nuclear power plant pressurized leak sealing and ice plugging skills training facility as described in claim 2, characterized in that: The first installation pipe (223) is provided with a second shut-off valve (24) and a pressure gauge (25) in sequence along the liquid flow direction, and the first installation pipe (223) is connected to the first replacement pipe (221) through a flange.

4. The nuclear power plant pressurized leak sealing and ice plugging skills training facility as described in claim 2 or 3, characterized in that: The training pipeline (22) further includes a second replacement pipe (224) and a second installation pipe (225) arranged sequentially at the water outlet of the glass blind plate (222) along the liquid flow direction, and the second replacement pipe (224) is connected to the second installation pipe (225) through a flange.

5. The nuclear power plant pressurized leak sealing and ice plugging skills training facility as described in claim 4, characterized in that: The first line component (1) includes a main pipe (11) and a pressure testing device; The main pipeline (21) is connected to the mother pipe (11), and the mother pipe (11) is provided with a pressure port (111) and a water inlet (112); the pressure port (111) is connected to the output end of the pressure testing equipment, and a third shut-off valve (12) is provided on the pressure port (111).

6. The nuclear power plant pressurized leak sealing and ice plugging skills training facility as described in claim 4 or 5, characterized in that: A fourth shut-off valve (26) is provided on the second mounting pipe (225).

7. The nuclear power plant pressurized leak sealing and ice plugging skills training facility as described in claim 6, characterized in that: The second mounting tube (225) has a drilled hole (225a) for simulating a leak, and the drilled hole (225a) is sealed by a plug.

8. The nuclear power plant pressurized leak sealing and ice plugging skills training facility as described in claim 7, characterized in that: The opening of the drill hole (225a) on the second mounting pipe (225) faces the ground, and a water receiving device (27) for receiving leakage is provided directly below the drill hole (225a).

9. The nuclear power plant pressurized leak sealing and ice plugging skills training facility as described in claim 8, characterized in that: A water inlet pipe (28) is connected between the water receiving device (27) and the main pipeline (21).

10. The nuclear power plant pressurized leak sealing and ice plugging skills training facility as described in claim 9, characterized in that: A fifth shut-off valve (29) is installed on the water inlet pipe (28).

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