Special tool for cleaning water cap of nuclear power plant

Abstract

The utility model provides a special tool for cleaning a water cap of a nuclear power plant. The special tool comprises a case, an air compression system, a dry ice storage chamber, a spray gun assembly and a control system, the control system controls the air compression system and the spray gun assembly to work. The spray gun assembly comprises an ice spraying pipeline and an extended spray rod, the air compression system is communicated with the dry ice storage chamber through an air pipe, dry ice particles are stored in the dry ice storage chamber, the dry ice storage chamber is connected with the ice spraying pipeline, the ice spraying pipeline is connected with the extended spray rod, at least one nozzle is formed in the extended spray rod, and the extended spray rod is connected with the air compression system. The size of the extension spray rod is configured to extend into the water cap filter head; according to the utility model, the extended spray rod is arranged, so that a tool can go deep into a difficult-to-touch area in the water cap, and omnibearing cleaning is facilitated; the tool can quickly and effectively clean dirt and impurities in the water cap, and the cleaning efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of auxiliary instruments for nuclear power plants, in particular to a special tool for cleaning water caps in nuclear power plants. Background Art

[0002] The desalination bed water cap filter head of the RCV / TEP / PTR / APG / TEU system of the pressurized water reactor nuclear power plant is composed of a support plate, a support frame, a ring, a connecting ring, a pipe and other parts. Each type of filter head is composed of a certain number of rings stacked together. The gap between the rings constitutes the filter channel of the filter head (that is, the gap width is ≤300um). The number of rings determines the flow area of ​​the filter head. At the upper and lower ends of the stacked rings are the connecting rings and the support plate, which are fastened together by bolts.

[0003] The desalination bed water cap filter head is a wire-cut and reverse-wound filter, which is often clogged by various impurities and dirt during use (the blockages are mainly water rust, water-soluble paper, broken resin, cotton wool and other impurities), affecting its normal operation.

[0004] The traditional cleaning method is to use a long rod with a brush to extend into the water cap filter head, brush the dirt adhering to the inner wall, and then use compressed air (8-10bar) to blow it. It needs to be cleaned many times, and the decontamination effect is not ideal. The original brush cleaning method may introduce foreign matter into the brush and wear the water cap filter head. Therefore, it is urgent to develop a set of efficient and safe water cap cleaning special tools to solve this problem. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a special tool for cleaning water caps of nuclear power plants in view of the above problems.

[0006] The utility model solves the above technical problems by adopting a technical solution: providing a special tool for cleaning water caps in nuclear power plants, comprising a chassis, an air compression system, a dry ice storage chamber, a spray gun assembly and a control system respectively installed on the chassis;

[0007] The control system controls the operation of the air compression system and the spray gun assembly respectively;

[0008] The spray gun assembly includes an ice spray pipe and an extended spray rod. The air compression system is connected to the dry ice storage chamber through an air pipe. The dry ice storage chamber is connected to the ice spray pipe. The ice spray pipe is connected to the extended spray rod. The extended spray rod is provided with at least one nozzle. The size of the extended spray rod is configured to be able to extend into a water cap filter head.

[0009] Further, preferably, the extended spray rod comprises a spray pipe, a spray port of the extended spray rod is arranged at the bottom of the spray pipe, and the spray port is arranged around the spray pipe.

[0010] Furthermore, it is preferred that the extended spray rod comprises a spray pipe, the spray outlet of the extended spray rod is arranged at the bottom of the spray pipe, the bottom of the extended spray rod is connected to a water drop-shaped water drop head, and the spray ejected from at least one spray outlet hits the water drop head.

[0011] Furthermore, it is preferred that the surface of at least one nozzle is an inclined surface inclined toward the direction of the water drop head, so that the spray ejected from the nozzle hits the water drop head.

[0012] Furthermore, it is preferred that a 360° rotating integrated component is provided on the extended spray boom to drive the extended spray boom to rotate 360°.

[0013] Furthermore, it is preferred that a hand-held ice-spraying control switch is provided between the ice-spraying pipe and the extended spraying rod, and the hand-held ice-spraying control switch is used to control the spraying of the extended spraying rod to be turned on or off.

[0014] Further, preferably, the extended spray rod comprises a fastener, and the fastener fixedly connects the ice spray handheld control switch to the extended spray rod.

[0015] Furthermore, preferably, the air compression system further comprises a pressure regulating valve, and the pressure regulating valve is communicatively connected to the control system.

[0016] Furthermore, it is preferred that an ice outlet regulator is provided between the spray gun assembly and the dry ice storage chamber, and the ice outlet regulator is connected to the control system.

[0017] Furthermore, it is preferred that the dry ice storage chamber is a dry ice funnel, and the dry ice funnel is detachably connected to the chassis.

[0018] The implementation of this utility model has at least the following beneficial effects:

[0019] 1. Efficient cleaning: By utilizing dry ice blasting technology, the tool can quickly and effectively clean dirt and impurities inside the water cap, improving cleaning efficiency.

[0020] 2. Environmental protection and safety: Using dry ice as the cleaning medium will not damage the surface of the object being cleaned (especially the metal surface), nor will it affect the smoothness of the metal surface. In addition, dry ice is easy to vaporize without secondary pollution and will not introduce new foreign matter, thus ensuring the environmental protection and safety of the cleaning process.

[0021] 3. Flexible operation: The design of the extended spray bar enables the tool to reach the hard-to-reach areas inside the water cap, facilitating all-round cleaning.

[0022] 4. Intelligent control: Through the control system, the pressure of the air compression system and the amount of dry ice sprayed can be accurately adjusted to achieve fine control of the cleaning process. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a schematic diagram of a three-dimensional structure explosion in some embodiments of the special tool for cleaning water caps of nuclear power plants in the utility model;

[0025] Figure 2 It is a three-dimensional structural schematic diagram of the extended spray rod in the utility model. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0028] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0029] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0031] Herein, the nozzle 221 may be an opening with a larger diameter or a hole with a smaller diameter, and the diameter of the nozzle 221 is not limited.

[0032] The utility model provides a special tool for cleaning water caps in nuclear power plants, such as Figure 1-Figure 2 As shown, it includes a case 10, an air compression system 30, a dry ice storage chamber 50, a spray gun assembly 20, and a control system 40. The integrated design of these components makes the entire cleaning process more automated and intelligent.

[0033] The air compression system 30 , the dry ice storage chamber 50 , the spray gun assembly 20 and the control system 40 are respectively installed on the housing 10 ; the control system 40 controls the air compression system 30 and the spray gun assembly 20 to work respectively. The spray gun assembly 20 includes an ice spray pipe 21 and an extended spray rod 22. The air compression system 30 is connected to the dry ice storage chamber 50 through an air pipe. The compressed air system provides compressed air, and the compressed air serves as a power and carrier to provide power for the spray gun assembly 20. Dry ice particles are stored in the dry ice storage chamber 50. The dry ice storage chamber 50 is connected to the ice spray pipe 21, and the ice spray pipe 21 is connected to the extended spray rod 22. The extended spray rod 22 is provided with at least one nozzle 221. Under the power of compressed air, the dry ice particles are accelerated particles and are ejected from the nozzle 221 of the spray gun assembly 20 and sprayed onto the surface of the water cap filter. The momentum change, sublimation, melting and other energy conversion of the high-speed moving solid dry ice particles are utilized to rapidly freeze the dirt, oil stains, residual impurities and the like on the surface of the cleaned object, thereby condensing, embrittlement and being peeled off, and at the same time being removed with the air flow, so that the dirt and impurities inside the water cap are quickly and effectively cleaned, thereby improving the cleaning efficiency.

[0034] Furthermore, the extended spray bar 22 is configured to be sized to extend into the water cap filter head, thereby achieving precise spraying, allowing the tool to penetrate into hard-to-reach areas inside the water cap, facilitating all-round cleaning.

[0035] An air inlet is provided on the outer surface of the chassis 10, and the air inlet is used to connect to the air compression system 30 to provide compressed air. An ice outlet 12 is provided on the outer surface of the chassis 10, and the ice outlet 12 is used to connect to the spray gun assembly 20 to spray dry ice particles together with the pressurized compressed air.

[0036] In a specific embodiment, if Figure 1-Figure 2 As shown, the extended spray rod 22 includes a nozzle 222, and a nozzle 221 of the extended spray rod 22 is arranged at the bottom of the nozzle 222. The nozzle 221 is arranged around the nozzle 222, and the nozzle 221 is arranged around the nozzle 222 so that all-round spraying can be achieved, which is convenient for all-round cleaning.

[0037] In a specific embodiment, if Figure 1-Figure 2 As shown, the extended spray rod 22 includes a nozzle 222, and the nozzle 221 of the extended spray rod 22 is arranged at the bottom of the nozzle 222. The bottom of the extended spray rod 22 is connected to a water droplet-shaped water droplet head 23, and the spray ejected from at least one nozzle 221 hits the water droplet head 23; on the one hand, when the dry ice particles and the pressurized air source are ejected through the nozzle 222, the dry ice will hit the water droplet head 23 when it is ejected through the nozzle 221 to achieve 360-degree spraying, which is convenient for all-round cleaning; on the other hand, the design of the water droplet-shaped water droplet head 23 can be used as a supporting buffer. When the extended spray rod 22 extends into the water cap filter head, the water droplet head 23 can contact the inner wall of the water cap filter head to provide support for the extended spray rod 22, and the setting of the annular outer wall can reduce the scratches and bumps of the extended spray rod 22 on the water cap filter head.

[0038] Furthermore, it is preferred that the surface of at least one nozzle 221 is an inclined surface inclined toward the direction of the water drop head 23, so that the spray ejected from the nozzle 221 can better impact the water drop head 23; the design of the nozzle 221 can enable the spray to more effectively impact and clean the target area, achieve 360-degree spraying, and facilitate all-round cleaning.

[0039] In a specific embodiment, a 360° rotating integrated component is provided on the extended spray rod 22 to drive the extended spray rod 22 to rotate 360°. The design of the 360° rotating integrated component further enhances the flexibility of operation to meet the cleaning needs at different angles; the 360° rotating integrated component adopts the existing rotating integrated component.

[0040] In a specific embodiment, an ice-spraying handheld control switch 24 is provided between the ice-spraying pipe 21 and the extended spray rod 22, and the ice-spraying handheld control switch 24 is used to control the spraying of the extended spray rod 22 to be turned on or off; the design of the ice-spraying handheld control switch 24 is convenient for the staff to control the opening and closing of the dry ice spraying gas at any time during operation.

[0041] In a specific embodiment, the extended spray rod 22 includes a fastener 223 , and the fastener 223 fixedly connects the ice spray handheld control switch 24 to the extended spray rod 22 .

[0042] In a specific embodiment, the air compression system 30 further includes a pressure regulating valve 31, which is in communication with the control system 40. The pressure regulating valve 31 is configured to adjust the injection pressure of the compressed air. A pressure gauge may also be provided in the chassis 10 to display the pressure of the air pressure regulating valve.

[0043] In a specific embodiment, an ice outlet regulator 60 is provided between the spray gun assembly 20 and the dry ice storage chamber 50. The ice outlet regulator 60 is connected to the control system 40. The ice outlet regulator 60 is used to adjust the amount of dry ice spraying. In an embodiment, the dry ice spraying amount can be adjusted in the range of 0-2000 grams as required.

[0044] In a specific embodiment, the dry ice storage chamber 50 is a dry ice funnel, which is detachably connected to the chassis 10. The dry ice storage chamber is designed to be detachable, which is convenient for replacing and replenishing dry ice, and also convenient for the maintenance and care of the tool; or the dry ice storage chamber 50 is a groove arranged in the chassis 10, and dry ice particles are stored in the groove.

[0045] In a specific embodiment, the implementation process of the special tool for cleaning the water cap of a nuclear power plant in this embodiment is as follows: Preparation: First, remove the dry ice funnel from the chassis 10, fill it with an appropriate amount of dry ice particles, and then reinstall it back into the chassis 10. Check the working status of the air compression system 30 and the control system 40 to ensure that everything is normal. Operation settings: According to the specific situation and degree of dirt on the water cap, set the appropriate spray pressure and dry ice output through the control system 40. This can be achieved by adjusting the pressure regulating valve 31 and the ice output regulator 60. Cleaning process: Extend the extended spray rod 22 into the water cap and start the spraying through the ice spraying handheld control switch 24. During the spraying process, the direction of the spray rod can be adjusted by rotating the integrated part 360° to ensure that every corner can be effectively cleaned. At the same time, observe the cleaning situation and adjust the spray pressure and dry ice amount as needed. Cleaning completion: When the dirt inside the water cap is thoroughly cleaned, turn off the spray switch, pull the extended spray rod 22 out of the water cap, spray the dry ice in the chassis 10, and turn off the air compression system 30. Check the inside of the water cap to confirm the cleaning effect. Subsequent maintenance: After cleaning, perform necessary maintenance and care on the tool. In particular, clean the residue inside the spray rod to avoid affecting the next use. At the same time, regularly check the dry ice storage and replenish it in time.

[0046] The implementation of this utility model has at least the following beneficial effects:

[0047] 1. Efficient cleaning: By utilizing dry ice blasting technology, the tool can quickly and effectively clean dirt and impurities inside the water cap, improving cleaning efficiency.

[0048] 2. Environmental protection and safety: Using dry ice as the cleaning medium will not damage the surface of the object being cleaned (especially the metal surface), nor will it affect the smoothness of the metal surface. In addition, dry ice is easy to vaporize without secondary pollution and will not introduce new foreign matter, thus ensuring the environmental protection and safety of the cleaning process.

[0049] 3. Flexible operation: The design of the extended spray bar enables the tool to reach the hard-to-reach areas inside the water cap, facilitating all-round cleaning.

[0050] 4. Intelligent control: Through the control system, the pressure of the air compression system and the amount of dry ice sprayed can be accurately adjusted to achieve fine control of the cleaning process.

[0051] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope covered by the utility model.

Claims

1. A special tool for cleaning water caps in nuclear power plants, characterized in that: It includes a chassis, an air compression system, a dry ice storage chamber, a spray gun assembly and a control system respectively mounted on the chassis; The control system controls the operation of the air compression system and the spray gun assembly respectively; The spray gun assembly includes an ice spray pipe and an extended spray rod. The air compression system is connected to a dry ice storage chamber through an air pipe. Dry ice particles are stored in the dry ice storage chamber. The dry ice storage chamber is connected to the ice spray pipe. The ice spray pipe is connected to the extended spray rod. The extended spray rod is provided with at least one nozzle. The size of the extended spray rod is configured to be able to extend into a water cap filter head.

2. The special tool for cleaning water caps in nuclear power plants according to claim 1, characterized in that: The extended spray rod comprises a spray pipe, a spray port of the extended spray rod is arranged at the bottom of the spray pipe, and the spray ports are arranged around the spray pipe.

3. The special tool for cleaning water caps in nuclear power plants according to claim 1, characterized in that: The extended spray rod comprises a spray pipe, a nozzle of the extended spray rod is arranged at the bottom of the spray pipe, the bottom of the extended spray rod is connected to a water drop-shaped water drop head, and a spray ejected from at least one nozzle hits the water drop head.

4. The special tool for cleaning water caps in nuclear power plants according to claim 3, characterized in that: The surface of at least one nozzle is an inclined surface inclined toward the water drop head, so that the spray ejected from the nozzle hits the water drop head.

5. The special tool for cleaning water caps in nuclear power plants according to claim 1, characterized in that: The extended spray bar is provided with a 360° rotating integrated component to drive the extended spray bar to rotate 360°.

6. The special tool for cleaning water caps in nuclear power plants according to claim 1, characterized in that: An ice-spraying handheld control switch is provided between the ice-spraying pipe and the extended spraying rod, and the ice-spraying handheld control switch is used to control the spraying of the extended spraying rod to be turned on or off.

7. The special tool for cleaning water caps in nuclear power plants according to claim 6, characterized in that: The extended spray rod includes a fastener, and the fastener securely connects the ice spray handheld control switch to the extended spray rod.

8. The special tool for cleaning water caps in nuclear power plants according to claim 1, characterized in that: The air compression system further comprises a pressure regulating valve, which is communicatively connected with the control system.

9. The special tool for cleaning water caps in nuclear power plants according to claim 1, characterized in that: An ice-discharging regulator is arranged between the spray gun assembly and the dry ice storage chamber, and the ice-discharging regulator is connected to the control system.

10. The special tool for cleaning water caps in nuclear power plants according to claim 1, characterized in that: The dry ice storage chamber is a dry ice funnel, and the dry ice funnel is detachably connected to the chassis; or the dry ice storage chamber is a groove arranged in the chassis.

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