A special tool for adding ion-exchange resin to a nuclear power plant capacity control system

Abstract

The utility model relates to a special tool for adding resin of ion exchanger of nuclear power plant capacity control system, including vertical connecting pipeline (1) and hopper type feeding opening (2), the vertical connecting pipeline (1) is located above ion exchanger interface, its one end is connected with ion exchanger interface through flange (3), the other end is connected with the discharge port of hopper type feeding opening (2), be equipped with butterfly valve (4) in the vertical connecting pipeline (1). The utility model is specially made a special tool for adding resin according to the specific structure and size of ion exchanger upper interface flange. Application this tool, not only can effectively prevent system medium overflow, can prevent radioactive medium leakage more, thereby reduces the risk that the surface of operation field area is contaminated, at the same time, the tool can significantly shorten the operation time of resin addition, reduces the time of staff in the field to accept external irradiation, and then reduces the personal and collective radiation dose of operation group.

Description

Technical Field

[0001] This utility model relates to the field of nuclear power plant maintenance auxiliary technology, and in particular to a special tool for adding resin to the ion exchanger of a nuclear power plant capacity control system. Background Technology

[0002] Nuclear power plants, as a crucial component of clean energy, occupy an increasingly important position in the global energy structure. The Chemical Capacity Control System (CVS) is a vital system in nuclear power plants used to control and purify cooling water, and the normal operation of its ion exchangers is crucial to the safety and efficiency of the entire plant. However, traditional operating methods for adding resin to the ion exchangers in CVS systems have numerous problems, severely impacting operational efficiency and safety: First, the low position of the ion exchanger interfaces in the CVS system makes resin spillage during addition extremely easy, resulting in material waste and increased cleanup workload; second, when backflow or backflow occurs in the ion exchanger, the system medium is prone to overflow, potentially causing equipment contamination or safety hazards; third, the use of demineralized water requires dedicated personnel, and the demineralized water hoses often overflow due to water pressure fluctuations, wasting manpower and posing a risk of leakage; fourth, traditional operating methods are labor-intensive, and improper operation can damage the interface flange sealing surfaces, further increasing on-site workload and raising radiation risks for personnel. These problems seriously affect the operational efficiency and safety of nuclear power plants. Utility Model Content

[0003] The purpose of this utility model is to provide a special tool for adding resin to the ion exchanger of a nuclear power plant capacity control system. This tool can effectively prevent resin spillage and system medium overflow during the resin addition process. Moreover, the tool is simple and safe to operate and can effectively improve work efficiency.

[0004] The objective of this utility model can be achieved through the following technical solutions:

[0005] A special tool for adding resin to an ion exchanger in a nuclear power plant capacity control system includes a vertical connecting pipe and a funnel-shaped feeding port. The vertical connecting pipe is located above the ion exchanger interface, with one end connected to the ion exchanger interface via a flange and the other end connected to the outlet of the funnel-shaped feeding port. A butterfly valve is provided in the vertical connecting pipe.

[0006] Preferably, the vertical connecting pipe includes a first vertical connecting pipe and a second vertical connecting pipe, the butterfly valve is disposed between the first vertical connecting pipe and the second vertical connecting pipe, the end of the first vertical connecting pipe away from the butterfly valve is connected to the outlet of the funnel-shaped feed port, and the end of the second vertical connecting pipe away from the butterfly valve is connected to the ion exchanger interface through a flange.

[0007] Preferably, the end of the second vertical connecting pipe that connects to the ion exchanger interface is provided with a first connecting flange face, the ion exchanger interface is provided with a second connecting flange face, a sealing gasket is provided between the first connecting flange face and the second connecting flange face, and the first connecting flange face and the second connecting flange face are connected by bolts and nuts.

[0008] In this utility model, the second connecting flange face and the sealing gasket are the original flange connecting face and the old sealing gasket of the ion exchanger interface. Therefore, this utility model is a special tool designed for the specific structure and size of the upper interface flange of the ion exchanger.

[0009] Preferably, the first vertical connecting pipe has a third connecting flange face at one end near the butterfly valve, and the second vertical connecting pipe has a fourth connecting flange face at one end near the butterfly valve.

[0010] Preferably, the butterfly valve is a manual butterfly valve.

[0011] Preferably, the butterfly valve includes a valve body, a valve shaft passing through the valve body, and a butterfly plate coaxially arranged with the valve shaft. The valve body has an inner cavity that mates with the butterfly plate. One end of the valve shaft has a rotating handle. The valve body has bolt holes. The butterfly valve is connected to a third connecting flange and a fourth connecting flange by bolts and nuts.

[0012] Preferably, the length of the first vertical connecting pipe is less than the length of the second vertical connecting pipe.

[0013] Preferably, the diameter of the vertical connecting pipe is the same as the diameter of the ion exchanger interface and the diameter of the outlet of the funnel-shaped feed port.

[0014] More preferably, the outlet of the funnel-shaped feeding port is integrally formed with the first vertical connecting pipe.

[0015] Preferably, funnel handles are provided on the outer walls of both sides of the funnel-shaped feeding port.

[0016] Preferably, the funnel-shaped feed port is also provided with a valve for connecting the demineralized water pipe on its side wall.

[0017] Preferably, the valve is detachably connected to the demineralized water pipe via a clamp structure.

[0018] More preferably, the valve and the funnel handle are located on different surfaces of the funnel-shaped feeding port.

[0019] This invention provides a special tool for adding resin to an ion exchanger in a nuclear power plant's chemical capacity control system (CVS). The tool consists of a funnel-shaped inlet, a vertical connecting pipe, a butterfly valve, and a flange. Its ingenious design utilizes the existing flange face and gasket of the ion exchanger interface. The tool is installed onto the upper part of the ion exchanger interface via the flange face at the lower end of the vertical connecting pipe and is then evenly tightened, ensuring installation stability and sealing while effectively protecting the interface flange face. Simultaneously, by installing a vertical connecting pipe at a certain height, the funnel-shaped inlet, serving as the resin addition port, can be raised to a suitable height. This design not only facilitates resin addition but also effectively prevents system media overflow. Furthermore, a manual butterfly valve is installed on the vertical pipe, which can be promptly closed in case of backflow, further preventing system media and resin overflow. Additionally, the tool is equipped with a valve to secure the demineralized water pipe, ensuring stable demineralized water supply without overflow.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] (1) This utility model provides a special tool for adding resin to the ion exchanger of a nuclear power plant capacity control system, including a vertical connecting pipe and a funnel-shaped feeding port. The vertical connecting pipe is connected to the ion exchanger interface via a flange. This special tool can effectively prevent resin spillage and system medium overflow during the resin addition process. Moreover, the tool is simple and safe to operate and can significantly improve work efficiency.

[0022] (2) In this utility model, by using a vertical connecting pipe with the same diameter as the interface of the CVS system ion exchanger, the resin addition port can be raised to a suitable height, which facilitates resin addition and successfully solves the problem of the low position of the interface of the CVS system ion exchanger and the easy spillage of resin during addition in the prior art.

[0023] (3) Based on the original flange connection surface and old sealing gasket of the ion exchanger interface, this utility model sets a corresponding flange connection surface at the lower end of the vertical connection pipe, so that the vertical connection pipe and the ion exchanger interface can be firmly connected by flange, effectively preventing the system medium from overflowing, and protecting the interface flange connection surface.

[0024] (4) In this utility model, a butterfly valve is installed on the vertical pipeline. When backflow or backflow occurs, the butterfly valve can be closed in time to further prevent the system medium and resin from overflowing.

[0025] (5) In this utility model, a funnel-shaped resin feeding port is adopted, which is convenient for adding resin on site; at the same time, a valve is provided on the funnel, and the demineralized water pipe can be connected and fixed to the valve through a clamp structure to achieve stable output of demineralized water.

[0026] (6) Using the special tool of this utility model, while preventing the system medium from overflowing, it can effectively block the overflow of radioactive media and reduce the risk of surface contamination in the work area. This tool can significantly shorten the resin addition work time and reduce the time that workers are exposed to external radiation on site (originally, adding a single resin tank required 6-7 people and the work time was about 4-5 hours; after using this tool, only 4-5 people are needed and the work time is about 2-3 hours), thereby effectively reducing the individual and collective doses of the work team.

[0027] (7) This utility model is easy to operate, has a simple structure, has a certain strength, and is highly compatible with the system interface flange. It is easy to use, transport and store, and can form a standardized operating procedure. Attached Figure Description

[0028] Figure 1 This is the front view of the present invention;

[0029] Figure 2 This is a top view of the present invention;

[0030] In the diagram, 1-vertical connecting pipe; 11-first vertical connecting pipe; 12-second vertical connecting pipe; 2-funnel-shaped feed port; 3-flange; 4-butterfly valve; 5-funnel handle. Detailed Implementation

[0031] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. This embodiment is based on the technical solution of the present invention and provides detailed implementation methods and specific operating procedures; however, the scope of protection of the present invention is not limited to the following embodiments.

[0032] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] Unless otherwise specified, the functional components or structures in the following embodiments or examples are conventional components or structures used in the art to achieve the corresponding functions.

[0035] Example 1

[0036] A special tool for adding resin to the ion exchanger in a nuclear power plant capacity control system, such as... Figure 1-2 As shown, it includes a vertical connecting pipe 1 and a funnel-shaped feed port 2. The vertical connecting pipe 1 is arranged vertically directly above the ion exchanger interface; its lower end is connected to the ion exchanger interface through a flange 3, and its upper end is connected and fixed to the outlet of the funnel-shaped feed port 2. A butterfly valve 4 is installed in the middle of the vertical connecting pipe 1.

[0037] Example 2

[0038] A special tool for adding resin to an ion exchanger in a nuclear power plant capacity control system includes a vertical connecting pipe 1 and a funnel-shaped feeding port 2, with a butterfly valve 4 installed in the vertical connecting pipe 1.

[0039] In this embodiment, the vertical connecting pipe 1 consists of a first vertical connecting pipe 11 and a second vertical connecting pipe 12. The upper end of the first vertical connecting pipe 11 is welded and fixed to the outlet of the funnel-shaped feeding port 2, and the lower end is provided with a third connecting flange face; the upper end of the second vertical connecting pipe 12 is provided with a fourth connecting flange face, and the lower end is provided with a first connecting flange face. The length of the first vertical connecting pipe 11 is less than the length of the second vertical connecting pipe 12.

[0040] In this embodiment, the lower end of the second vertical connecting pipe 12 is sealed to the ion exchanger interface through the flange 3: a sealing gasket is set between the first connecting flange face and the second connecting flange face of the ion exchanger interface, and then the gasket is tightened by evenly distributed bolts and nuts to ensure the integrity of the pressure-bearing boundary.

[0041] In this embodiment, the butterfly valve 4 is clamped between the first vertical connecting pipe 11 and the second vertical connecting pipe 12. The butterfly valve 4 includes a valve body 41, a valve shaft 42 passing through the valve body 41, a butterfly plate 43 coaxially fixed with the valve shaft 42, and a rotating handle 44 installed on the outer end of the valve shaft 42. Bolt holes are evenly distributed on the end face of the valve body 41, and it is fastened to the third connecting flange face and the fourth connecting flange face respectively by bolt-nut assemblies.

[0042] In this embodiment, the diameter of the vertical connecting pipe 1, the diameter of the ion exchanger interface, and the diameter of the funnel-shaped feed port 2 are all equal.

[0043] In this embodiment, funnel-shaped feed inlet 2 is symmetrically welded with funnel handles 5 on both outer walls, allowing operators to maintain a stable grip during operation. A valve is also provided on the side wall of the funnel-shaped feed inlet 2, which is connected to the demineralized water pipe using a clamp structure.

[0044] When using this utility model, the following steps are included:

[0045] (1) Transfer the special tool of this utility model to the predetermined position, and clamp and fix the butterfly valve 4 between the connecting flange faces of the first vertical connecting pipe 11 and the second vertical connecting pipe 12 to ensure that there are no visible defects or signs of damage on the sealing surface of the connecting flange.

[0046] (2) Check butterfly valve 4 to ensure that the handle and butterfly plate rotate freely without jamming and that the seal is excellent.

[0047] (3) Remove the original flange connection components covering the second connection flange surface on the system ion exchanger interface, so that the second connection flange surface of the system ion exchanger interface is fully exposed, and confirm that the second connection flange surface is free of defects and the sealing gasket is free of obvious damage.

[0048] (4) Move the assembled special tool to the upper part of the ion exchanger interface, and fasten the first connecting flange face of the second vertical connecting pipe 12 and the second connecting flange face of the ion exchanger interface with bolts and nuts to complete the assembly work.

[0049] (5) Operate the rotating handle to open the butterfly valve 4 and add resin to the funnel-shaped feed port 2. If backflow or backflow occurs in the ion exchanger during the addition process, close the butterfly valve 4 to prevent the system medium and resin from overflowing.

[0050] (6) After the resin is added, install the demineralized water pipe on the valve through the clamp structure, open the valve to introduce demineralized water, and then perform stable flushing.

[0051] This invention was applied during a major overhaul of the nuclear island at a nuclear power plant in the resin addition process. The specialized tool of this invention assisted in the resin addition work, achieving the expected results. The evaluation is as follows:

[0052] 1. This invention ensures the stability of the tool's structure and provides sufficient strength to withstand the weight of heavy objects.

[0053] 2. Easy and quick to assemble and disassemble.

[0054] 3. Significantly reduced the radiation exposure time for workers.

[0055] 4. The tool has a simple structure, is easy to operate, and prevents media overflow.

[0056] 5. Reusable.

[0057] The above description of the embodiments is provided to enable those skilled in the art to understand and use the utility model. It will be apparent to those skilled in the art that various modifications can be easily made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present utility model is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present utility model without departing from its scope should be within the protection scope of the present utility model.

Claims

1. A special tool for adding resin to an ion exchanger in a nuclear power plant capacity control system, characterized in that, It includes a vertical connecting pipe (1) and a funnel-shaped feeding port (2). The vertical connecting pipe (1) is located above the ion exchanger interface. One end of the pipe is connected to the ion exchanger interface through a flange (3), and the other end is connected to the outlet of the funnel-shaped feeding port (2). A butterfly valve (4) is provided in the vertical connecting pipe (1).

2. The special tool for adding resin to an ion exchanger in a nuclear power plant capacity control system according to claim 1, characterized in that, The vertical connecting pipe (1) includes a first vertical connecting pipe (11) and a second vertical connecting pipe (12). The butterfly valve (4) is located between the first vertical connecting pipe (11) and the second vertical connecting pipe (12). The end of the first vertical connecting pipe (11) away from the butterfly valve (4) is connected to the outlet of the funnel-shaped feed port (2). The end of the second vertical connecting pipe (12) away from the butterfly valve (4) is connected to the ion exchanger interface through a flange (3).

3. A special tool for adding resin to an ion exchanger in a nuclear power plant capacity control system according to claim 2, characterized in that, The second vertical connecting pipe (12) is provided with a first connecting flange at one end connected to the ion exchanger interface, and the ion exchanger interface is provided with a second connecting flange. A sealing gasket is provided between the first connecting flange and the second connecting flange. The first connecting flange and the second connecting flange are connected by bolts and nuts.

4. A special tool for adding resin to an ion exchanger in a nuclear power plant capacity control system according to claim 2, characterized in that, The first vertical connecting pipe (11) has a third connecting flange face at one end near the butterfly valve (4), and the second vertical connecting pipe (12) has a fourth connecting flange face at one end near the butterfly valve (4).

5. A special tool for adding resin to an ion exchanger in a nuclear power plant capacity control system according to claim 4, characterized in that, The butterfly valve (4) includes a valve body, a valve shaft passing through the valve body, and a butterfly plate coaxially arranged with the valve shaft. The valve body is provided with an inner cavity that cooperates with the butterfly plate. One end of the valve shaft is provided with a rotating handle. The valve body is provided with bolt holes. The butterfly valve (4) is connected to the third connecting flange and the fourth connecting flange by bolts and nuts.

6. A special tool for adding resin to an ion exchanger in a nuclear power plant capacity control system according to claim 2, characterized in that, The length of the first vertical connecting pipe (11) is less than the length of the second vertical connecting pipe (12).

7. A special tool for adding resin to an ion exchanger in a nuclear power plant capacity control system according to claim 1, characterized in that, The diameter of the vertical connecting pipe (1) is the same as the diameter of the ion exchanger interface and the diameter of the outlet of the funnel-shaped feed port (2).

8. A special tool for adding resin to an ion exchanger in a nuclear power plant capacity control system according to claim 1, characterized in that, Funnel handles (5) are provided on the outer walls of both sides of the funnel-shaped feeding port (2).

9. A special tool for adding resin to an ion exchanger in a nuclear power plant capacity control system according to claim 1, characterized in that, The funnel-shaped feed inlet (2) is also equipped with a valve for connecting the demineralized water pipe.

10. A special tool for adding resin to an ion exchanger in a nuclear power plant capacity control system according to claim 9, characterized in that, The valve is detachably connected to the demineralized water pipe via a clamp structure.

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