Chemical decontamination auxiliary device for main pump of nuclear power station

Abstract

The utility model discloses an auxiliary chemical decontamination device for a main pump of a nuclear power station, which relates to the technical field of chemical decontamination of nuclear power stations and comprises a cleaning mechanism comprising a moving part arranged on the ground, a gas supply part arranged on the moving part, a material supply part arranged on the moving part, a dry ice crushing part arranged on the moving part and an adjusting part arranged on the dry ice crushing part, the bearing mechanism comprises a base plate part and a protective cover part arranged on the base plate part and connected with the air supply part, dirt can be rapidly and thoroughly removed in a dry ice particle spraying mode, the surface of a cleaned object cannot be damaged, carbon dioxide can be directly gasified in the dry ice cleaning process, the carbon dioxide returns to the air, and the cleaning effect is good. Secondary waste and residues are not generated, the decontamination efficiency is high, the environment-friendly and healthy effects are achieved, the requirement for the use space is not high, and the machine operability is easy.

Description

Technical Field

[0001] This utility model relates to the field of chemical decontamination technology for nuclear power plants, and in particular to an auxiliary device for chemical decontamination of the main pump of a nuclear power plant. Background Technology

[0002] In the operation and maintenance of nuclear power plants, a large amount of radioactive contaminated equipment is generated every year. Most of this equipment is still functional, but it can easily cause personnel contamination. To reduce the negative impact of radioactive contaminated equipment on the operation and maintenance of nuclear power plants, it is necessary to decontaminate this equipment.

[0003] Currently, the main decontamination processes in nuclear power plants are immersion and wiping. After chemical decontamination of components, stains often remain after cleaning, with many hard-to-reach areas that cannot be cleaned. This results in low decontamination coefficients, slow decontamination efficiency, and the generation of large amounts of secondary waste liquid, making deep decontamination of equipment impossible through chemical methods. Laser decontamination technology, with its advantages of high efficiency and non-contact operation, has begun to be applied to nuclear power plants in recent years. However, the dust generated by laser decontamination has not been considered. Due to the special nature of nuclear power plants, the dust generated by laser decontamination is often radioactive. If this dust adheres to workers, it will affect their health. Furthermore, laser decontamination can cause damage and ablation to the equipment surface during the process.

[0004] To address this issue, we propose a chemical decontamination auxiliary device for the main pump of a nuclear power plant. Utility Model Content

[0005] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0006] In view of the problems of incomplete cleaning of dead corners and generation of radioactive dust in the cleaning process of nuclear power plant components in the above or existing technologies, this utility model is proposed.

[0007] Therefore, the purpose of this invention is to provide an auxiliary device for chemical decontamination of the main pump of a nuclear power plant.

[0008] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a chemical decontamination auxiliary device for a nuclear power plant main pump, comprising,

[0009] A cleaning mechanism includes a movable part disposed on the ground, an air supply part disposed on the top of the movable part, a material supply part disposed on the top of the movable part, a dry ice crushing part disposed above the movable part, and an adjustment part disposed on one side of the dry ice crushing part.

[0010] The supporting mechanism includes a chassis section and a protective cover section disposed on the chassis section and connected to the air supply section.

[0011] As a preferred embodiment of the auxiliary device for chemical decontamination of the main pump of a nuclear power plant according to this utility model, the moving part includes a support plate, a pad disposed on the top of the support plate, a caster wheel disposed on the bottom of the support plate, and a bracket disposed on the top of the support plate and located on one side of the support plate.

[0012] As a preferred embodiment of the auxiliary device for chemical decontamination of the main pump of a nuclear power plant according to this utility model, the gas supply unit includes a high-pressure gas cylinder disposed on the top of the pad plate, a pressure reducing valve disposed on the high-pressure gas cylinder, a delivery pipe disposed on the pressure reducing valve, a venturi tube disposed on the delivery pipe, a flexible hose disposed on the delivery pipe, a diverter pipe disposed at one end of the delivery pipe, an air inlet valve disposed on the diverter pipe, and a nozzle disposed at one end of the air inlet valve.

[0013] As a preferred embodiment of the chemical decontamination auxiliary device for the main pump of a nuclear power plant according to this utility model, the feeding unit includes a fixed plate disposed on the support, a dry refrigerator disposed at the bottom of the fixed plate, a sealing cover disposed at the top of the dry refrigerator, and the interior of the dry refrigerator is filled with dry ice.

[0014] As a preferred embodiment of the chemical decontamination auxiliary device for the main pump of a nuclear power plant according to this utility model, the dry ice crushing section includes a protective box mounted on the support, a crushing tank mounted inside the protective box, a first grinding disc mounted inside the crushing tank, a base mounted inside the protective box, a motor mounted on the inner wall of the base, and a second grinding disc mounted at the output end of the motor.

[0015] As a preferred embodiment of the auxiliary device for chemical decontamination of the main pump of a nuclear power plant according to this utility model, the adjusting part includes a horizontal bar disposed on one side of the protective box, a limiting sleeve one disposed on the outer surface of the horizontal bar, a vertical bar disposed on the front of the limiting sleeve one, a limiting sleeve two disposed on the outer surface of the vertical bar, and a fixing ring disposed on the front of the limiting sleeve two.

[0016] As a preferred embodiment of the chemical decontamination auxiliary device for the main pump of a nuclear power plant according to this utility model, the adjusting part further includes a limiting hole one disposed at the top of the crossbar and a limiting hole two disposed on the back of the vertical bar.

[0017] As a preferred embodiment of the auxiliary device for chemical decontamination of the main pump of a nuclear power plant according to this utility model, the adjusting part further includes a first pin disposed on the first limiting sleeve and adapted to the first limiting hole, and a second pin disposed on the second limiting sleeve and adapted to the second limiting hole.

[0018] As a preferred embodiment of the chemical decontamination auxiliary device for the main pump of a nuclear power plant according to this utility model, the chassis includes a circular base and a slide rail disposed on the top of the circular base.

[0019] As a preferred embodiment of the auxiliary device for chemical decontamination of the main pump of a nuclear power plant according to this utility model, the protective cover includes a glass cover disposed on the slide rail, a reserved groove disposed on the outer surface of the glass cover and adapted to the nozzle, and a sealing ring disposed on the reserved groove.

[0020] The beneficial effects of this utility model's auxiliary device for chemical decontamination of the main pump in a nuclear power plant are as follows: The dry ice crushing unit breaks dry ice into fine particles, which are then sprayed onto the surface of the object to be cleaned using high-pressure gas. Dry ice can quickly and thoroughly remove dirt without damaging the surface. After the dry ice completes its cleaning process, the small size of the particles causes them to vaporize, releasing carbon dioxide back into the air, thus preventing secondary waste and residue. The device is highly efficient, environmentally friendly, and requires minimal space. It is also easy to operate. Furthermore, during the cleaning process, operators can push the moving part to rotate the gas supply unit and glass cover around the object, ensuring a comprehensive cleaning. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0022] Figure 1 A schematic diagram of the overall structure of the chemical decontamination auxiliary device for the main pump of a nuclear power plant.

[0023] Figure 2 A schematic diagram of the gas supply section of the chemical decontamination auxiliary device for the main pump of a nuclear power plant.

[0024] Figure 3 A schematic diagram of the support structure for the chemical decontamination auxiliary device of the main pump in a nuclear power plant.

[0025] Figure 4 A schematic diagram of the feeding section of the chemical decontamination auxiliary device for the main pump of a nuclear power plant.

[0026] Figure 5 This is a schematic diagram of the regulating section of the chemical decontamination auxiliary device for the main pump of a nuclear power plant.

[0027] Figure 6A schematic cross-sectional view of the dry ice crushing section of the chemical decontamination auxiliary device for the main pump of a nuclear power plant. Detailed Implementation

[0028] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0029] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0030] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0031] Example 1, referring to Figure 1 and Figure 3 This is the first embodiment of the present utility model. This embodiment provides a chemical decontamination auxiliary device for the main pump of a nuclear power plant, which can achieve a comprehensive cleaning effect. It includes a cleaning mechanism 100, including a movable part 101 disposed on the ground, an air supply part 102 disposed on the top of the movable part 101, a material supply part 103 disposed on the top of the movable part 101, a dry ice crushing part 105 disposed above the movable part 101, and an adjustment part 104 disposed on one side of the dry ice crushing part 105.

[0032] The support mechanism 200 includes a chassis 201 and a protective cover 202 disposed on the chassis 201 and connected to the air supply unit 102.

[0033] Specifically, this device uses dry ice particle spraying, which can quickly and thoroughly remove dirt without damaging the surface of the object being cleaned. During the dry ice cleaning process, carbon dioxide will directly vaporize and return to the air, without producing secondary waste or residue. It has high cleaning efficiency, is environmentally friendly and healthy, and does not require much space. The machine is easy to operate, and the cleaning mechanism 100 rotates around the supporting mechanism 200 to achieve all-round cleaning of the components to be cleaned.

[0034] Example 2, refer to Figure 1This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that the moving part 101 includes a support plate 101a, a pad 101b disposed on the top of the support plate 101a, a caster wheel 101c disposed on the bottom of the support plate 101a, and a bracket 101d disposed on the top of the support plate 101a and located on one side of the support plate 101a.

[0035] Specifically, the caster wheel 101c is equipped with a braking structure, which can reduce unnecessary movement of the device and improve the stability of the device.

[0036] Reference Figure 2 The gas supply unit 102 includes a high-pressure gas cylinder 102a disposed on the top of the pad 101b, a pressure reducing valve 102b disposed on the high-pressure gas cylinder 102a, a delivery pipe 102c disposed on the pressure reducing valve 102b, a venturi tube 102d disposed on the delivery pipe 102c, a hose 102e disposed on the delivery pipe 102c, a diverter pipe 102f disposed at one end of the delivery pipe 102c, an air inlet valve 102g disposed on the diverter pipe 102f, and a nozzle 102h disposed at one end of the air inlet valve 102g.

[0037] Furthermore, the high-pressure gas cylinder 102a is filled with nitrogen.

[0038] Reference Figure 4 The feeding unit 103 includes a fixing plate 103c disposed on the bracket 101d, a dry refrigerator 103a disposed at the bottom of the fixing plate 103c, and a sealing cover 103b disposed at the top of the dry refrigerator 103a.

[0039] Reference Figure 6 The dry ice crushing unit 105 includes a protective box 105a mounted on a support 101d, a crushing tank 105b mounted inside the protective box 105a, a first grinding disc 105c mounted inside the crushing tank 105b, a base 105e mounted inside the protective box 105a, a motor 105d mounted on the inner wall of the base 105e, and a second grinding disc 105f mounted at the output end of the motor 105d.

[0040] Furthermore, the crushing tank 105b is connected to the venturi tube 102d via a feed pipe. The crushed dry ice particles enter the venturi tube 102d through the feed pipe and flow along the conveying pipe 102c under the action of high-pressure gas.

[0041] Furthermore, by controlling the installation position of grinding disc 2 105f and adjusting its angle and gap with grinding disc 1 105c, the dry ice particle size can be adjusted.

[0042] During use, the staff adds dry ice to the dry freezer 103a, starts the motor 105d, and opens the pressure reducing valve 102b. The dry ice is crushed into particles by the first grinding disc 105c and the second grinding disc 105f in the crushing tank 105b. The dry ice particles are released from the nozzle 102h by high-pressure gas through the venturi tube 102d. The state of the dry ice at the outlet of the nozzle 102h is carefully observed, and the components to be cleaned are cleaned.

[0043] Example 3, referring to Figure 5 This is the third embodiment of the present invention. Unlike the second embodiment, this embodiment provides a chemical decontamination auxiliary device for the main pump of a nuclear power plant. The adjusting part 104 includes a horizontal bar 104a disposed on one side of the protective box 105a, a limiting sleeve 104b disposed on the outer surface of the horizontal bar 104a, a vertical bar 104c disposed on the front side of the limiting sleeve 104b, a limiting sleeve 2 104d disposed on the outer surface of the vertical bar 104c, and a fixing ring 104e disposed on the front side of the limiting sleeve 2 104d.

[0044] Furthermore, the retaining ring 104e is installed on the delivery pipe 102c and is located on the right side of the hose 102e.

[0045] Specifically, the fixed ring 104e is used to control the conveying pipe 102c and maintain the stability of the conveying pipe 102c.

[0046] The adjustment part 104 also includes a limiting hole 104a-1 provided on the top of the horizontal bar 104a and a limiting hole 104c-1 provided on the back of the vertical bar 104c.

[0047] The adjustment unit 104 also includes a first pin 104b-1 disposed on the first limiting sleeve 104b and adapted to the first limiting hole 104a-1, and a second pin 104d-1 disposed on the second limiting sleeve 104d and adapted to the second limiting hole 104c-1.

[0048] Reference Figure 3 The chassis 201 includes a circular base 201a and a slide rail 201b disposed on the top of the circular base 201a.

[0049] The protective cover 202 includes a glass cover 202a disposed on the slide rail 201b, a reserved groove 202b disposed on the outer surface of the glass cover 202a and adapted to the nozzle 102h, and a sealing ring 202c disposed on the reserved groove 202b.

[0050] Specifically, during use, the operator controls the distance between the support mechanism 200 and the cleaning mechanism 100 by moving the position of the first limiting sleeve 104b on the horizontal bar 104a, and adjusts the angle of the nozzle 102h by moving the position of the second limiting sleeve 104d on the vertical bar 104c. As the moving part 101 rotates around the support mechanism 200, it drives the glass cover 202a to rotate on the slide rail 201b, allowing the nozzle to clean the components to be cleaned from all angles, reducing the generation of cleaning dead corners. The air pressure needs to be adjusted according to the material of the cleaning surface and the degree of cleaning, while the angle of the nozzle 102h is adjusted according to the height, shape, and angle of the cleaning surface. The cleaning status of the dirt on the equipment surface is observed. When the equipment surface is free of dirt and has a metallic luster, the cleaning work is completed.

[0051] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible without substantially departing from the novel teachings and advantages of the subject matter described in this application. For example, variations in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​such as temperature, pressure, etc., installation arrangements, use of materials, color, orientation, etc. For instance, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structurally equivalent but also equivalent in structure. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of this utility model. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0052] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0053] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0054] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A chemical decontamination auxiliary device for a nuclear power plant main pump, characterized in that: include, The cleaning mechanism (100) includes a movable part (101) disposed on the ground, an air supply part (102) disposed on the top of the movable part (101), a material supply part (103) disposed on the top of the movable part (101), a dry ice crushing part (105) disposed above the movable part (101), and an adjustment part (104) disposed on one side of the dry ice crushing part (105). The support mechanism (200) includes a chassis section (201) and a protective cover section (202) disposed on the chassis section (201) and connected to the air supply section (102).

2. The chemical decontamination auxiliary device for the main pump of a nuclear power plant as described in claim 1, characterized in that: The movable part (101) includes a support plate (101a), a pad (101b) disposed on the top of the support plate (101a), a caster wheel (101c) disposed on the bottom of the support plate (101a), and a bracket (101d) disposed on the top of the support plate (101a) and located on one side of the support plate (101a).

3. The chemical decontamination auxiliary device for the main pump of a nuclear power plant as described in claim 2, characterized in that: The gas supply unit (102) includes a high-pressure gas cylinder (102a) disposed on the top of the pad (101b), a pressure reducing valve (102b) disposed on the high-pressure gas cylinder (102a), a delivery pipe (102c) disposed on the pressure reducing valve (102b), a venturi tube (102d) disposed on the delivery pipe (102c), a hose (102e) disposed on the delivery pipe (102c), a shunt pipe (102f) disposed at one end of the delivery pipe (102c), an air inlet valve (102g) disposed on the shunt pipe (102f), and a nozzle (102h) disposed at one end of the air inlet valve (102g).

4. The chemical decontamination auxiliary device for the main pump of a nuclear power plant as described in claim 2 or 3, characterized in that: The feeding unit (103) includes a fixing plate (103c) disposed on the bracket (101d), a dry refrigerator (103a) disposed at the bottom of the fixing plate (103c), and a sealing cover (103b) disposed at the top of the dry refrigerator (103a). The dry refrigerator (103a) is filled with dry ice.

5. The chemical decontamination auxiliary device for the main pump of a nuclear power plant as described in claim 4, characterized in that: The dry ice crushing unit (105) includes a protective box (105a) disposed on the support (101d), a crushing tank (105b) disposed inside the protective box (105a), a first grinding disc (105c) disposed inside the crushing tank (105b), a base (105e) disposed inside the protective box (105a), a motor (105d) disposed on the inner wall of the base (105e), and a second grinding disc (105f) disposed at the output end of the motor (105d).

6. The chemical decontamination auxiliary device for the main pump of a nuclear power plant as described in claim 5, characterized in that: The adjustment part (104) includes a crossbar (104a) disposed on one side of the protective box (105a), a limiting sleeve one (104b) disposed on the outer surface of the crossbar (104a), a vertical bar (104c) disposed on the front of the limiting sleeve one (104b), a limiting sleeve two (104d) disposed on the outer surface of the vertical bar (104c), and a fixing ring (104e) disposed on the front of the limiting sleeve two (104d).

7. The chemical decontamination auxiliary device for the main pump of a nuclear power plant as described in claim 6, characterized in that: The adjustment part (104) also includes a limiting hole one (104a-1) disposed on the top of the crossbar (104a) and a limiting hole two (104c-1) disposed on the back of the vertical bar (104c).

8. The chemical decontamination auxiliary device for the main pump of a nuclear power plant as described in claim 6 or 7, characterized in that: The adjustment part (104) further includes a first pin (104b-1) disposed on the first limiting sleeve (104b) and adapted to the first limiting hole (104a-1), and a second pin (104d-1) disposed on the second limiting sleeve (104d) and adapted to the second limiting hole (104c-1).

9. The chemical decontamination auxiliary device for the main pump of a nuclear power plant as described in claim 8, characterized in that: The chassis (201) includes a circular base (201a) and a slide rail (201b) disposed on the top of the circular base (201a).

10. The chemical decontamination auxiliary device for the main pump of a nuclear power plant as described in claim 9, characterized in that: The protective cover (202) includes a glass cover (202a) disposed on the slide rail (201b), a reserved groove (202b) disposed on the outer surface of the glass cover (202a) and adapted to the nozzle (102h), and a sealing ring (202c) disposed on the reserved groove (202b).

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