A sewage pipe inner wall coating device

Abstract

The present invention belongs to the technical field of pipeline inner wall repair, and specifically relates to a sewage pipe inner wall coating device. The purpose is to use professional tools to solve the problem that the reference surface cannot be located when a large number of flange surfaces are damaged or a new coating is applied. The purpose is to solve the problem that the inner wall and welding area of ​​the sewage pipe on the seawater main pipeline of the nuclear power plant cannot be normally coated, and to design a device that can perform coating operations in a narrow space that is out of sight. It is characterized in that: it includes a handle, a brush, a base and a paint storage tank; the handle is fixed to the upper end of the base, and the paint storage tank is fixed to the left side of the lower end of the base; the brush is respectively arranged on the left end face of the base and the upper end face of the paint storage tank. The present invention transforms an ordinary painting brush and extends the brush base at the bottom in the horizontal direction to perform coating operations on the inner wall of the sewage pipe and the surrounding weld area.

Description

Technical Field

[0001] The invention belongs to the technical field of pipeline inner wall repair, and in particular relates to a sewage pipe inner wall coating device. Background Art

[0002] There are a large number of seawater pipes used for cooling the unit systems in the seawater systems of nuclear power plants in coastal areas of China. The sewage pipe is a small-diameter pipe that serves as a sewage pipe on the main seawater pipe. It is about 10-15cm in diameter and 15-20cm long and is installed on the main seawater pipe by direct welding. The sewage pipe is a corrosion-sensitive part of the pipe due to its small internal space and the presence of a weld between it and the main pipe. It is very easy to produce unqualified coating quality during the construction of the anti-corrosion layer, and there is a great corrosion hazard. During the unit maintenance, the anti-corrosion construction of the sewage pipe and the weld is often carried out by dismantling the main seawater pipe and performing anti-corrosion treatment on the inner wall and weld of the sewage pipe from the inside of the main seawater pipe. This method requires a long maintenance period when disassembling and assembling the main seawater pipe, and requires a lot of manpower and material resources, which brings many inconveniences to the on-site construction.

[0003] In the existing maintenance technology, without dismantling the main seawater pipeline, the only way to carry out anti-corrosion treatment on the sewage pipe and the surrounding welds is to use a small long-handled brush to coat the inside and the welds. This method not only cannot guarantee the coating quality, but also cannot be used to paint the areas where the welds are out of sight. If the anti-corrosion measures at the welds are not in place, corrosion is very likely to occur, causing the pipes to be perforated at the welds. Once perforated at the welds, it can only be repaired by cutting and re-welding. The whole set of repair procedures is not only cumbersome, but also threatens the normal and safe operation of the unit.

[0004] Therefore, it is necessary to develop a coating device for the inner wall of the drain hole and the surrounding weld area as soon as possible, which can perform coating operations on the above-mentioned areas without dismantling the seawater main pipeline. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that the inner wall and welding area of ​​the sewage pipe on the seawater main pipeline of a nuclear power plant cannot be normally coated, and to design a device that can perform coating operations in a narrow space that is out of sight.

[0006] The present invention is achieved in that:

[0007] A sewage pipe inner wall painting device comprises a handle, a brush, a base and a paint storage tank; the handle is fixed to the upper end of the base, and the paint storage tank is fixed to the left side of the lower end of the base; the brush is respectively arranged on the left end surface of the base and the upper end surface of the paint storage tank.

[0008] The base as described above is in the shape of a long rod as a whole and is used for mounting a brush and a paint storage tank.

[0009] The paint storage tank as described above is in a "U" shape as a whole, and is used to store excess paint on the brush and provide paint to the brush during the painting process, thereby ensuring that a sufficient amount of paint is supplied to the brush during the construction process.

[0010] The brush as described above is divided into two parts, an upper part and a lower part; the upper brush is fixed on the left end face of the base, extending in the horizontal direction, and is used to clean the inner wall of the sewage pipe; the lower brush is fixed on the upper end face of the paint storage tank, extending in the vertical direction, and is used to clean the weld at the connection of the seawater main pipe.

[0011] The handle, base and paint storage tank as mentioned above are all made of 304 stainless steel material; the brush is made of nylon 610 material.

[0012] The beneficial effects of the present invention are:

[0013] The present invention transforms an ordinary painting brush and extends the brush base at the bottom in a horizontal direction to paint the inner wall of the sewage pipe and the surrounding weld area. In addition, the present invention has a relatively simple use procedure and low use cost, and can cope with various complex on-site working environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a front view of a sewage pipe inner wall coating device of the present invention;

[0015] Figure 2 It is a working state diagram of a sewage pipe inner wall coating device of the present invention.

[0016] Among them: 1. Handle, 2. Brush, 3. Base, 4. Paint storage tank, 5. Flange surface, 6. Sewage pipe, 7. Seawater main pipe, 8. Welding seam. DETAILED DESCRIPTION

[0017] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0018] like Figure 1 As shown, a sewage pipe inner wall painting device includes a handle 1, a brush 2, a base 3 and a paint storage tank 4. The handle 1 is fixed to the upper end of the base 3, and the paint storage tank 4 is fixed to the left side of the lower end of the base 3. The brush 2 is respectively arranged on the left end surface of the base 3 and the upper end surface of the paint storage tank 4.

[0019] The base 3 is in the shape of a long rod as a whole and is used for installing the brush 2 and the paint storage tank 4 .

[0020] The paint storage tank 4 is "U"-shaped as a whole, and is used to store excess paint on the brush 2 and provide paint to the brush 2 during the painting process, ensuring that there is a sufficient amount of paint supplied to the brush during the construction process.

[0021] The brush 2 is divided into two parts, an upper part and a lower part. The upper brush 2 is fixed to the left end surface of the base 3, extending in the horizontal direction, and is used to clean the inner wall of the sewage pipe 6. The lower brush 2 is fixed to the upper end surface of the paint storage tank 4, extending in the vertical direction, and is used to clean the weld 8 at the connection of the seawater main pipe.

[0022] In this embodiment, the handle 1, the base 3 and the paint storage tank 4 are all made of 304 stainless steel; the brush 2 is made of nylon 610.

[0023] The working principle of the present invention is as follows:

[0024] When in use, when the sewage pipe 6 and the weld 8 are subjected to anticorrosion treatment, there is no need to disassemble the seawater main pipe, and the anticorrosion construction can be carried out by opening the flange cover at the flange surface 5. The specific steps are: hold the handle 1 by hand, soak the brush 2 with paint, and leave an appropriate amount of paint in the paint storage tank 4 for standby. Put the device into the sewage pipe 6 through the flange surface 5. When putting it in, try not to contact the inner wall of the pipe. The paint storage tank 4 should be perpendicular to the central axis of the sewage pipe 6 to ensure that the paint storage tank 4 is placed horizontally to prevent the paint therein from dripping into the seawater main pipe 7. After the paint storage tank 4 enters the bottom of the sewage pipe 6, that is, the seawater main pipe 7, move the device horizontally so that the brush 2 is close to the inner wall surface of the pipe, and move the device up and down so that the brush 2 is close to the weld 8 at the connection between the sewage pipe 6 and the seawater main pipe 7. After the device is placed, hold the handle 1 by hand and rotate it around the central main axis of the sewage pipe 6 to paint the inner wall of the sewage pipe 6 and the weld 8. If there is insufficient paint remaining on the brush, take out the device and repeat the above steps. After painting is completed, slowly take out the device.

[0025] The above is a detailed description of the implementation method of the present invention in conjunction with the embodiments, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of ordinary technicians in the field without departing from the purpose of the present invention. The contents not described in detail in the specification of the present invention can adopt the existing technology.

Claims

1. A sewage pipe inner wall coating device, Features: It comprises a handle (1), a brush (2), a base (3) and a paint storage tank (4); the handle (1) is fixed to the upper end of the base (3), and the paint storage tank (4) is fixed to the left side of the lower end of the base (3); the brush (2) is respectively arranged on the left end surface of the base (3) and the upper end surface of the paint storage tank (4); The paint storage tank (4) is in a "U" shape as a whole, and is used to store excess paint on the brush (2) and to provide paint to the brush (2) on the paint storage tank (4) during the painting process; The brush (2) is divided into two parts, an upper part and a lower part; the upper brush (2) is fixed to the left end surface of the base (3), extends in the horizontal direction, and is used to clean the inner wall of the sewage pipe (6); the lower brush (2) is fixed to the upper end surface of the paint storage tank (4), extends in the vertical direction, and is used to clean the weld (8) at the connection of the seawater main pipe; Use the following steps to treat the sewage pipe and welds for corrosion protection: Step 1, open the flange cover at the flange surface (5) of the sewage pipe; Step 2, holding the handle (1) by hand, soaking the brush (2) completely with paint, and leaving some paint in the paint storage tank (4) for use; Step 3, placing the device into the sewage pipe (6) through the flange surface (5), when placing the device, controlling the device not to contact the inner wall of the pipe, and the paint storage tank (4) being perpendicular to the central axis of the sewage pipe (6), ensuring that the paint storage tank (4) is placed horizontally to prevent the paint therein from dripping into the seawater main pipe (7); Step 4, after the paint storage tank (4) enters the seawater main pipe (7) at the bottom of the sewage pipe (6), the device is moved horizontally so that the upper part of the brush (2) is closely attached to the inner wall surface of the sewage pipe (6), and the device is moved up and down so that the lower part of the brush (2) is closely attached to the weld (8) at the connection between the sewage pipe (6) and the seawater main pipe (7); Step 5, after the device is placed, hold the handle (1) by hand and rotate it around the central axis of the sewage pipe (6) to paint the inner wall of the sewage pipe (6) and the weld (8). If there is insufficient paint on the brush, take out the device and repeat steps 2-4 until the painting is completed.

2. The sewage pipe inner wall coating device according to claim 1, Features: The base (3) is in the shape of a long rod as a whole and is used for mounting the brush (2) and the paint storage tank (4).

3. The sewage pipe inner wall coating device according to claim 1, Features: The handle (1), base (3) and paint storage tank (4) are all made of 304 stainless steel; the brush (2) is made of nylon 610.

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