Sealant permeation device for thermally spraying tungsten-based shielding coating on surface of nuclear power station pipeline

Abstract

The utility model discloses a nuclear power station pipeline surface thermal spraying tungsten-based shielding coating hole sealing agent permeation device, which comprises a hole sealing container, a hole sealing agent storage tank and a vacuum generator, the hole sealing container is used for accommodating a shielding coating sample, the hole sealing agent storage tank is connected with the hole sealing container through a hole sealing agent input pipeline, the hole sealing agent storage tank is used for placing a hole sealing agent, and the vacuum generator is connected with the hole sealing agent storage tank. The first end of the vacuum generator is connected to the hole sealing container through a first connecting pipeline, and the second end of the vacuum generator is connected to the hole sealing agent storage tank through a second connecting pipeline. According to the hole sealing agent permeation device for thermally spraying the tungsten-based shielding coating on the nuclear power station pipeline surface, the hole sealing agent is conveyed to the shielding coating sample contained in the hole sealing container through the hole sealing agent storage tank, vacuum hole sealing treatment of the shielding coating sample can be achieved by arranging the vacuum generator, the process is simple, the hole sealing efficiency is improved, and the production cost is reduced. The penetration depth of the hole sealing agent can be increased, and the shielding performance of a tungsten-based shielding coating is improved.

Description

Technical Field

[0001] The utility model relates to the field of radiation protection and thermal spraying, in particular to a sealing agent penetration device for thermally spraying a tungsten-based shielding coating on the surface of a nuclear power plant pipeline. Background Art

[0002] Plasma spraying is a technology that uses high-temperature plasma as a heat source to heat powdered materials to a molten or semi-molten state, and then sprays them onto the surface of the substrate at high speed to form a coating with specific properties. However, during the spraying process, the molten and deformed particles are stacked in an interlaced manner. Due to the different flight speeds and temperatures, the stacked coatings present obvious irregularities, resulting in gaps or holes between the stacked particles. For tungsten-based materials, which have a high melting point and high hardness, there are many semi-molten or slightly melted particles during plasma spraying, making it difficult for plastic deformation to occur during the stacking process, resulting in a large number of pores, which seriously affects its shielding performance.

[0003] In order to improve the shielding performance of tungsten-based shielding coatings, high-hydrogen organic shielding filling materials are used to seal the pores of the tungsten-based shielding coatings so that their pores are filled. Because there is a large amount of hydrogen in the sealing material, the tungsten-based shielding coatings can have gamma and neutron shielding properties.

[0004] At present, the sealing method used for conventional plasma coating is manual brushing, which is simple to operate and highly efficient, but has disadvantages such as shallow sealing penetration depth and long curing time, resulting in poor sealing effect, which is difficult to meet the sealing effect of tungsten-based shielding coating. Vacuum sealing is an improved sealing technology, but the existing vacuum sealing device is large in size and complex in structure. The sealing process requires different tanks such as sealing, curing and cleaning. It is suitable for sealing large parts, but not for small-sized samples. It has problems such as complex operation and waste of resources. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a sealing agent penetration device for thermally spraying tungsten-based shielding coating on the surface of nuclear power plant pipelines.

[0006] The technical solution adopted by the utility model to solve the technical problem is: constructing a sealing agent penetration device for thermally spraying a tungsten-based shielding coating on the surface of a nuclear power plant pipeline, which includes a sealing container, a sealing agent storage tank and a vacuum generator;

[0007] The sealing container is used to accommodate the shielding coating sample;

[0008] The sealing agent storage tank is connected to the sealing container via a sealing agent input pipeline, and the sealing agent storage tank is used to store the sealing agent;

[0009] The first end of the vacuum generator is connected to the sealing container through a first connecting pipe, and the second end of the vacuum generator is connected to the sealing agent storage tank through a second connecting pipe.

[0010] In some embodiments, a heater is provided in the sealed container.

[0011] In some embodiments, a temperature sensor is provided in the sealed container.

[0012] In some embodiments, a pressure gauge is connected to the sealing container.

[0013] In some embodiments, the pressure gauge is connected to the sealing container via a connecting piece, and a vent control button is provided on the connecting piece.

[0014] In some embodiments, the sealed container includes a container body.

[0015] In some embodiments, the sealed container further comprises a container cover covering the container body.

[0016] In some embodiments, the container body is made of metal.

[0017] In some embodiments, the cross-sectional shape of the container body is circular.

[0018] In some embodiments, the container cover is made of glass.

[0019] The implementation of the utility model has the following beneficial effects: the sealing agent penetration device for thermally spraying tungsten-based shielding coating on the surface of nuclear power plant pipelines conveys sealing agent to the shielding coating sample accommodated in the sealing container through the sealing agent storage tank, and can realize vacuum sealing treatment of the shielding coating sample by setting a vacuum generator, the process is simple, the sealing efficiency is improved, the sealing agent can penetrate deeply, and the shielding performance of the tungsten-based shielding coating is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solution of the utility model, the utility model will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only show certain embodiments of the utility model, and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work. In the drawings:

[0021] Figure 1 It is a schematic diagram of the overall structure of a sealing agent penetration device for thermally spraying a tungsten-based shielding coating on the surface of a nuclear power plant pipeline in some embodiments of the utility model. DETAILED DESCRIPTION

[0022] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation methods of the present invention are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "up", "down", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings, are constructed and operated in a specific direction, and are only for the convenience of describing the present technical solution, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation to the present invention.

[0023] It should also be noted that, unless otherwise clearly specified and limited, the terms such as "installed", "connected", "connected", "fixed", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. When an element is referred to as being "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or there may be one or more intermediate elements. The terms "first", "second", "third", etc. are only for the convenience of describing the present technical solution, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", "third", etc. can explicitly or implicitly include one or more of the features. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0024] See also Figure 1 , is a sealing agent penetration device for thermally spraying tungsten-based shielding coating on the surface of nuclear power plant pipelines in some embodiments of the utility model, which includes a sealing container 1, a sealing agent storage tank 2 and a vacuum generator 3. The sealing container 1 is used to accommodate the shielding coating sample, and the sealing agent storage tank 2 is connected to the sealing container 1 through a sealing agent input pipeline 41 and is used to place the sealing agent. The first end of the vacuum generator 3 is connected to the sealing container 1 through a first connecting pipeline 42, and the second end of the vacuum generator 3 is connected to the sealing agent storage tank 2 through a second connecting pipeline 43. The vacuum generator 3 can exhaust the air in the sealing container 1 for vacuuming. The shielding coating sample can be specifically a plasma tungsten-boron coating sample with a porosity of about 29%.

[0025] It can be understood that the sealing agent penetration device for thermally spraying tungsten-based shielding coating on the surface of nuclear power plant pipelines transports sealing agent to the shielding coating sample contained in the sealing container 1 through the sealing agent storage tank 2, and by setting up a vacuum generator 3, vacuum sealing treatment of the shielding coating sample can be achieved. The process is simple, the sealing efficiency is improved, and the sealing agent can also penetrate deeply, thereby improving the shielding performance of the tungsten-based shielding coating.

[0026] The sealing container 1 is provided with a heater, which can heat the inside of the sealing container 1 to solidify the sealing agent in the shielding coating sample. The sealing container 1 is provided with a temperature sensor for measuring the temperature inside the sealing container 1. The sealing container 1 is connected to a pressure gauge 11 for measuring the pressure inside the sealing container 1.

[0027] The pressure gauge 11 is connected to the sealing container 1 through a connecting piece 14, and an exhaust control button 15 is provided on the connecting piece 14. When the exhaust control button 15 is turned on, the air pressure in the sealing container 1 can be restored to normal pressure.

[0028] In addition, the sealing container 1 includes a container body 12 and a container cover 13 covering the container body 12. In this embodiment, the cross-sectional shape of the container body 12 is circular. In some other embodiments, the cross-sectional shape of the container body 12 may also be elliptical, rectangular or other shapes, which are not specifically limited here. The container body 12 is made of metal material, which can withstand high temperature and is corrosion-resistant. The container cover 13 is made of glass material, which is easy to observe the shielding coating sample.

[0029] Preferably, the sealing agent is a high-hydrogen organic shielding filling material. The high-hydrogen organic shielding filling material contains a large amount of hydrogen elements, which can make the shielding coating sample have gamma and neutron shielding properties.

[0030] Specifically, the specific use steps of the sealing agent penetration device for thermally spraying tungsten-based shielding coating on the surface of nuclear power plant pipelines are as follows:

[0031] 1. Put the shielding coating sample into the container body 12, then cover the container cover 13, and deliver the sealing agent into the sealing container 1 through the sealing agent input pipe 41 to submerge the surface of the shielding coating sample;

[0032] 2. Turn on the vacuum generator 3 to evacuate the air in the sealing container 1, so that the pressure value of the pressure gauge 11 is below "0". Bubbles will appear on the surface of the shielding coating sample at first, and stop after a while. Keep the vacuum for 15 minutes;

[0033] 3. Turn off the vacuum generator 3, and rotate the exhaust control button 15 to start exhaust, restore the air pressure in the sealing container 1 to normal pressure, and discharge the sealing agent through the sealing agent input pipe 41;

[0034] 4. Deionized water is introduced into the sealing agent input pipe 41, and the heater inside the sealing container 1 is turned on to start heating to 80°C-90°C to solidify the sealing agent inside the pores of the shielding coating sample. Meanwhile, during the water flow process, the excess sealing agent on the surface of the shielding coating sample can be removed;

[0035] 5. Deionized water is continuously heated for 10-20 minutes and then discharged from the sealing container 1;

[0036] 6. Remove the shield coating sample and wipe it clean.

[0037] After taking out the shielding coating sample, the penetration depth of the sealant can be measured. The microscopic morphology and component distribution of the coating cross section can be detected. If the composition of each pore is similar to that of the high-hydrogen organic shielding filling material, it indicates that the sealant has penetrated and filled all the pores in the shielding coating sample. The neutron shielding performance test can also be carried out on the shielding coating sample after penetration.

[0038] It can be understood that the above embodiments only express the preferred implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the utility model. It should be pointed out that, for ordinary technicians in this field, without departing from the concept of the utility model, the above-mentioned technical features can be freely combined, and several deformations and improvements can be made, which all belong to the protection scope of the utility model. Therefore, all equivalent changes and modifications made to the scope of the claims of the utility model should fall within the scope of the claims of the utility model.

Claims

1. A sealing agent penetration device for thermal spraying tungsten-based shielding coating on the surface of nuclear power plant pipelines, characterized in that: It comprises a sealing container (1), a sealing agent storage tank (2) and a vacuum generator (3); The sealing container (1) is used to contain a shielding coating sample; The sealing agent storage tank (2) is connected to the sealing container (1) via a sealing agent input pipeline (41), and the sealing agent storage tank (2) is used to store the sealing agent; The first end of the vacuum generator (3) is connected to the sealing container (1) via a first connecting pipe (42), and the second end of the vacuum generator (3) is connected to the sealing agent storage tank (2) via a second connecting pipe (43).

2. The sealing agent penetration device for thermal spraying tungsten-based shielding coating on the surface of nuclear power plant pipeline according to claim 1 is characterized in that: A heater is provided in the sealing container (1).

3. The sealing agent penetration device for thermally spraying tungsten-based shielding coating on the surface of nuclear power plant pipeline according to claim 1 is characterized in that: A temperature sensor is provided in the sealing container (1).

4. The sealing agent penetration device for thermal spraying tungsten-based shielding coating on the surface of nuclear power plant pipeline according to claim 1 is characterized in that: The sealing container (1) is connected to a pressure gauge (11).

5. The sealing agent penetration device for thermally spraying tungsten-based shielding coating on the surface of nuclear power plant pipeline according to claim 4 is characterized in that: The pressure gauge (11) is connected to the sealing container (1) via a connecting piece (14), and an exhaust control button (15) is provided on the connecting piece (14).

6. The sealing agent penetration device for thermal spraying tungsten-based shielding coating on the surface of nuclear power plant pipeline according to claim 1 is characterized in that: The sealing container (1) comprises a container body (12).

7. The sealing agent penetration device for thermally spraying tungsten-based shielding coating on the surface of nuclear power plant pipelines according to claim 6 is characterized in that: The sealing container (1) further comprises a container cover (13) which covers the container body (12).

8. The sealing agent penetration device for thermally spraying tungsten-based shielding coating on the surface of nuclear power plant pipelines according to claim 6 is characterized in that: The container body (12) is made of metal.

9. The sealing agent penetration device for thermally spraying tungsten-based shielding coating on the surface of nuclear power plant pipelines according to claim 6, characterized in that: The cross-sectional shape of the container body (12) is circular.

10. The sealing agent penetration device for thermally spraying tungsten-based shielding coating on the surface of nuclear power plant pipelines according to claim 7, characterized in that: The container cover (13) is made of glass.

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