A spiral cleaning device for the inner wall of a steel pipe

Abstract

The utility model provides a kind of steel pipe inner wall spiral cleaning device, it relates to pipeline cleaning field, the steel pipe inner wall spiral cleaning device, including connecting column, the left side of the connecting column is provided with pretreatment mechanism, the left side of the pretreatment mechanism is provided with cleaning mechanism;Pretreatment mechanism is sprayed pretreatment agent to inner wall by nozzle, soften heavy viscous oil dirt and high-temperature coking, the steel pipe inner wall spiral cleaning device, pretreatment agent (degreaser / rust remover) in liquid storage cylinder is extruded by hydraulic telescopic rod drive sealing plug, forms stable pressure to liquid outlet, after equalizing by pressure equalizing chamber, it is ensured that spray head mist evenly covers steel pipe inner wall, fully penetrates stubborn dirt deep, breaks strong adhesion;Hydraulic telescopic rod speed is adjustable, can increase pressure, extend time to ensure softening, lay foundation for subsequent cleaning, avoid medium pollution and pipeline abrasion caused by residual from source.

Description

Technical Field

[0001] This utility model relates to a cleaning device, specifically a spiral cleaning device for the inner wall of a steel pipe, belonging to the field of pipeline cleaning technology. Background Technology

[0002] Steel pipes are widely used in petroleum, chemical, and municipal pipeline networks. After long-term transport of media, their inner walls are prone to accumulating oil, rust, scale, and impurities. Failure to clean them promptly can affect transport efficiency, contaminate the media, and even cause pipe blockage or corrosion. Existing spiral cleaning devices for steel pipe inner walls typically consist of a drive unit and a spiral brush head assembly, achieving cleaning by rotating the brush head to scrape the inner wall.

[0003] A search revealed a Chinese patent with publication number CN205200079U that discloses a steel pipe inner wall cleaning brush. Its advantages lie in the use of a magnetic brush head and a steel wire cable traction structure. The brush head achieves elastic extension and retraction through a connecting sleeve, adapting to the inner cavity of steel pipes with different degrees of curvature. At the same time, it uses magnetic adsorption to remove oxide scale, reducing the risk of pipe blockage. It is simple to operate and has high cleaning efficiency.

[0004] However, the aforementioned patents still have shortcomings. For heavy, viscous oil stains in oil pipelines and high-temperature coking deposits in chemical pipelines, due to their strong adhesion, they can only peel off the surface layer, leaving oil film and coking particles in the deeper layers, which will contaminate the transported medium and aggravate pipeline wear. Summary of the Invention

[0005] (a) Technical problems to be solved The purpose of this invention is to provide a spiral cleaning device for the inner wall of steel pipes to solve the above-mentioned problems, thereby addressing the issues in the prior art where oil pipes are heavily stained with oil and chemical pipes are only stripped of the surface layer of coking material, which contaminates the transported medium and exacerbates pipe wear.

[0006] (II) Technical Solution This utility model is achieved through the following technical solution: a spiral cleaning device for the inner wall of a steel pipe, including a connecting column, a pretreatment mechanism on the left side of the connecting column, and a cleaning mechanism on the left side of the pretreatment mechanism; the pretreatment mechanism sprays a pretreatment agent onto the inner wall through a nozzle to soften heavy, viscous oil and high-temperature coking substances; the cleaning mechanism uses a composite structure of a steel wire scraping layer + a flexible cleaning cotton layer + magnetic adsorption particles (the steel wire layer breaks down the surface of the coking substances, the flexible cotton layer wipes away tiny dirt particles, and the magnetic particles adsorb metal oxide scale, avoiding residual dirt particles from causing media contamination and pipe wear). The pretreatment mechanism includes a liquid storage cylinder. A set of equidistant concentric liquid outlet holes are provided on the right side of the outer surface of the liquid storage cylinder. A ring is fixedly connected to the right side of the outer surface of the liquid storage cylinder. A pressure equalization chamber is opened on the inner side wall of the ring. The pressure equalization chamber is connected to the liquid outlet holes. A set of equidistant concentric spray heads are installed on the outer surface of the pressure equalization chamber. When the degreasing agent / rust remover liquid inside the liquid storage cylinder is pressurized, it will enter the interior of the pressure equalization chamber through the liquid outlet holes. The pressure equalization chamber will then transport the degreasing agent / rust remover liquid to the spray heads, and finally spray it evenly on the inner wall of the steel pipe to be treated. A sealing plate is fixedly connected to the left end of the liquid storage cylinder. A hydraulic telescopic rod is installed on the right side of the sealing plate. A top support plate is fixedly connected to the output end of the hydraulic telescopic rod. A sealing plug that mates with the inner wall of the liquid storage cylinder is fixedly installed on the right side of the top support plate. As the hydraulic telescopic rod extends continuously, it drives the top support plate and the sealing plug to move continuously to the right, thereby increasing the pressure of the degreasing agent / rust remover liquid inside the liquid storage cylinder. Preferably, the right end of the liquid storage cylinder is fixedly connected to the left end of the connecting column, and a liquid injection port is provided on the right side of the outer surface of the liquid storage cylinder for easy liquid injection. A plug is installed on the liquid injection port to prevent leakage. Degreasing agent / rust remover liquid can be conveniently added into the liquid storage cylinder through the liquid injection port, and the plug is used to prevent leakage from the liquid injection port. Preferably, the cleaning mechanism includes a rotating cylinder, the right end of which is rotatably connected to the left side of the sealing plate; the trajectory of the rotating cylinder is determined by the rotatable connection between the rotating cylinder and the sealing plate. Preferably, a servo motor is installed inside the rotating cylinder, and the servo motor is fixedly installed on the left side of the sealing plate; the servo motor is completely sealed inside the rotating cylinder to prevent it from being corroded by dust or solution during operation. Preferably, the output shaft of the servo motor is fixedly connected to the left side wall of the rotating cylinder, and an annular steel wire brush is fixedly installed on the right side of the outer surface of the rotating cylinder; the rotation of the servo motor can drive the rotating cylinder to rotate stably, and at the same time drive the annular steel wire brush to rotate for operation. Preferably, the working surface of the annular wire brush is in contact with the inner wall of the steel pipe to be treated, and an annular flexible cotton is fixedly installed in the middle of the outer surface of the rotating cylinder; as the rotating cylinder rotates, the annular flexible cotton rotates to perform the operation. Preferably, the working surface of the annular flexible cotton is in contact with the inner wall of the steel pipe to be treated, and an annular magnet is fixedly installed on the left side of the outer surface of the rotating cylinder; a certain distance is maintained between the annular magnet and the side wall of the steel pipe to be treated to prevent the annular magnet from being damaged by friction, and the iron filings removed by grinding can be attracted by the magnetism of the annular magnet itself. Preferably, two sets of symmetrical rubber wheels are fixedly installed on the outer surface of the connecting column, and a rod-connecting ring is fixedly installed on the right end of the connecting column; the two sets of symmetrical rubber wheels are attached to the side wall of the steel pipe, and the steel wire rope is tied by the rod-connecting ring, so as to drag the device and drive the two sets of rubber wheels to roll inside the steel pipe, thereby driving the device to move and operate.

[0007] This utility model provides a spiral cleaning device for the inner wall of steel pipes, which has the following beneficial effects: 1. This spiral cleaning device for the inner wall of steel pipes uses a hydraulic telescopic rod to drive the sealing plug of the pretreatment agent (degreasing agent / rust remover) in the storage tank. This creates a stable pressure that is then delivered to the outlet. The pressure is then balanced by the pressure equalization chamber, ensuring that the agent sprayed from multiple spray heads evenly covers the inner wall of the steel pipe in a mist-like manner. This allows the agent to fully penetrate the deep structure of heavy, viscous oil stains and high-temperature coking deposits, breaking down their strong adhesion. At the same time, the extension speed of the hydraulic telescopic rod can be flexibly adjusted. For heavy oil stains or high-temperature coking deposits with stronger adhesion, the spraying pressure can be increased and the spraying time can be extended to ensure that the deep dirt is fully softened. This lays the foundation for the subsequent cleaning mechanism to thoroughly remove the dirt, thus avoiding media contamination and pipeline wear caused by deep residual oil film and coke particles from the source.

[0008] 2. This spiral cleaning device for the inner wall of steel pipes adopts a design of "pretreatment first, cleaning later, and both operations simultaneously." Combined with an operation method where a steel wire rope is threaded through and fixed to the other end of the steel pipe before pulling the device, it completely avoids the time-consuming problem of traditional devices that perform pretreatment and cleaning in stages. While the spray nozzle of the pretreatment mechanism sprays pretreatment agent to soften the dirt, the annular steel wire brush, annular flexible cotton, and annular magnet of the cleaning mechanism start working simultaneously, without waiting for the softening process. Simultaneously, after the steel wire rope is threaded through and fixed to the other end of the steel pipe, pulling the steel wire rope will move the device smoothly along the length of the steel pipe. This allows the pretreatment and cleaning actions to form a continuous spiral trajectory, achieving one-stop simultaneous treatment of the inner wall of the steel pipe: "softening-scraping-wiping-adsorption." Compared with traditional segmented operations, this significantly shortens the cleaning cycle and is especially suitable for cleaning long-distance industrial steel pipes. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a three-dimensional structural exploded view of the pretreatment mechanism of this utility model; Figure 3 This is a three-dimensional structural exploded view of the cleaning mechanism of this utility model; Figure 4 This utility model Figure 2 Enlarged structural diagram at point A in the middle; Figure 5 This utility model Figure 2Enlarged structural diagram at point B.

[0010] [Explanation of Key Component Symbols] 1. Connecting column; 2. Pretreatment mechanism; 201. Liquid storage tank; 202. Injection port; 203. Plug; 204. Liquid outlet; 205. Circular ring; 206. Pressure equalization chamber; 207. Spray head; 208. Sealing plate; 209. Hydraulic telescopic rod; 210. Top support plate; 211. Sealing plug; 3. Cleaning mechanism; 301. Rotating cylinder; 302. Servo motor; 303. Circular wire brush; 304. Circular flexible cotton; 305. Circular magnet; 4. Rubber wheel; 5. Connecting ring with rod. Detailed Implementation

[0011] This utility model provides a spiral cleaning device for the inner wall of a steel pipe. Example 1:

[0012] Please see Figure 1 , Figure 2 , Figure 4 and Figure 5 The system includes a connecting column 1, a pretreatment mechanism 2 on the left side of the connecting column 1, a liquid storage cylinder 201, a set of equidistant concentric outlet holes 204 on the right side of the outer surface of the liquid storage cylinder 201, a ring 205 fixedly connected to the right side of the outer surface of the liquid storage cylinder 201, a pressure equalization chamber 206 formed on the inner wall of the ring 205, the pressure equalization chamber 206 communicating with the outlet holes 204, and a set of equidistant concentric spray heads 207 mounted on the outer surface of the pressure equalization chamber 206; the left end of the liquid storage cylinder 201 is fixed A sealing plate 208 is connected, and a hydraulic telescopic rod 209 is installed on the right side of the sealing plate 208. A top support plate 210 is fixedly connected to the output end of the hydraulic telescopic rod 209. A sealing plug 211 that mates with the inner wall of the liquid storage cylinder 201 is fixedly installed on the right side of the top support plate 210. The right end of the liquid storage cylinder 201 is fixedly connected to the left end of the connecting column 1. A liquid inlet 202 for easy liquid filling is provided on the right side of the outer surface of the liquid storage cylinder 201. A plug 203 to prevent leakage is installed on the liquid inlet 202.

[0013] The connecting column 1 of this device is the core supporting component. Its left side is fixedly connected to the liquid storage cylinder 201 of the pretreatment mechanism 2, forming the basic framework for the pretreatment operation. In the pretreatment mechanism 2, the right side of the outer surface of the liquid storage cylinder 201 is not only provided with an injection port 202 for easy addition of pretreatment agents such as degreasing agents and rust removers, but also equipped with a plug 203 to prevent leakage of the agents. At the same time, a set of equidistant concentric liquid outlet holes 204 are opened on the right side of the outer surface of the liquid storage cylinder 201, and a ring 205 with a pressure equalization chamber 206 is fixedly connected. The pressure equalization chamber 206 is connected to the liquid outlet holes 204, and a set of equidistant concentric spray heads 207 are also installed on the outer surface. On the right side of the sealing plate 208 fixed at the left end of the liquid storage cylinder 201, a hydraulic telescopic rod 209 is installed. Its output end is connected to a top holding plate 210, and a sealing plug 211 adapted to the inner wall of the liquid storage cylinder 201 is fixed on the right side of the top holding plate 210. During operation, first unscrew the plug 203 and add the appropriate pretreatment agent into the storage cylinder 201 through the injection port 202, then tighten the plug 203 to seal. Start the hydraulic telescopic rod 209, which drives the top plate 210 and the sealing plug 211 to move to the right, squeezing the pretreatment agent in the storage cylinder 201. The agent enters the pressure equalization chamber 206 through the outlet hole 204. The pressure equalization chamber 206 can equalize the agent pressure, ensuring that the agent sprayed by multiple spray heads 207 is evenly covered on the inner wall of the steel pipe in a mist, avoiding insufficient softening caused by uneven local spraying. Moreover, the extension speed of the hydraulic telescopic rod 209 can be flexibly adjusted. For heavy and viscous oil stains in oil pipes and high-temperature coking substances in chemical pipes, the pressure can be increased and the spraying time can be extended, allowing the agent to fully penetrate the deep layer of dirt, breaking its strong adhesion. This solves the defect of existing devices that can only soften the surface of stubborn dirt, laying a key foundation for subsequent thorough cleaning. Example 2:

[0014] Please see Figure 1 , Figure 2 and Figure 3 A cleaning mechanism 3 is provided on the left side of the pretreatment mechanism 2. The cleaning mechanism 3 includes a rotating cylinder 301, the right end of which is rotatably connected to the left side of the sealing plate 208. A servo motor 302 is provided inside the rotating cylinder 301 and is fixedly installed on the left side of the sealing plate 208. The output shaft of the servo motor 302 is fixedly connected to the left side wall of the rotating cylinder 301. An annular wire brush 303 is fixedly installed on the right side of the outer surface of the rotating cylinder 301. The working surface of the annular wire brush 303 is in contact with the inner wall of the steel pipe to be treated. An annular flexible cotton 304 is fixedly installed in the middle of the outer surface of the rotating cylinder 301. The working surface of the annular flexible cotton 304 is in contact with the inner wall of the steel pipe to be treated. An annular magnet 305 is fixedly installed on the left side of the outer surface of the rotating cylinder 301.

[0015] A cleaning mechanism 3 is set on the left side of the pretreatment mechanism 2. The right end of its rotating cylinder 301 is rotatably connected to the left side of the sealing plate 208 to ensure stable rotation trajectory. The servo motor 302 is sealed and fixed to the left side of the sealing plate 208 inside the rotating cylinder 301 to prevent dust and chemicals from corroding the motor and to ensure the life of the core power components. The output shaft of the servo motor 302 is fixedly connected to the left side wall of the rotating cylinder 301, which can drive the rotating cylinder 301 to rotate stably. The outer surface of the rotating cylinder 301 is fixed with an annular steel wire brush 303, an annular flexible cotton 304 and an annular magnet 305 in the order of "right-middle-left". The working surfaces of the annular steel wire brush 303 and the annular flexible cotton 304 are in contact with the inner wall of the steel pipe to be treated, while the annular magnet 305 is kept at a certain distance from the side wall of the steel pipe to prevent friction damage. During operation, while the pretreatment unit 2 sprays chemicals to soften the dirt, the servo motor 302 is activated to drive the rotating drum 301 to rotate: the annular wire brush 303 first scrapes off the softened coke surface and large impurities at high speed, the annular flexible cotton 304 then wipes away the tiny dirt particles and residual chemicals, and the annular magnet 305 finally adsorbs the metal oxide scale; this three-layer composite cleaning structure of "scraping-wiping-adsorption" thoroughly removes deep oil film and coke particles that existing devices cannot remove, avoiding the problems of contamination of the transport medium and pipe wear from the root, and significantly improving the thoroughness of cleaning. Example 3:

[0016] Please refer to it again. Figure 1 Two sets of symmetrical rubber wheels 4 are fixedly installed on the outer surface of the connecting column 1, and a rod-type connecting ring 5 is fixedly installed on the right end of the connecting column 1.

[0017] Two sets of symmetrical rubber wheels 4 are installed on the outer surface of the connecting column 1, and a rod-connecting ring 5 is fixed to its right end. Together, they constitute the device's movement and adaptation system. During operation, one end of the steel wire rope is first passed through the steel pipe to be cleaned to the other end, and then the steel wire rope is tied and fixed to the rod-connecting ring 5. Pulling the steel wire rope outside the steel pipe will move the device. During movement, the rubber wheels 4, due to their elasticity, conform to the inner wall of the steel pipe within a small deviation range of different inner diameters, reducing movement resistance and preventing device deviation. This ensures that components such as the spray head 207 of the pretreatment mechanism 2 and the annular steel wire brush 303 of the cleaning mechanism 3 remain in an adapted working state with the inner wall of the steel pipe. This structure eliminates the need for complex drive components inside the steel pipe, allowing a single person to complete the wire rope threading, tying, and pulling operations. It not only adapts to industrial steel pipes of different lengths but also significantly reduces labor costs and operational difficulty, solving the problems of inconvenient movement and poor adaptability of traditional cleaning devices, thus improving the device's practicality and ease of operation.

[0018] Working principle: First, pass one end of the steel wire rope through one end of the steel pipe to be cleaned to the other end, and fix the other end of the steel wire rope at the other end of the steel pipe. Then, tie and fix the steel wire rope at the other end of the steel pipe to the rod connecting ring 5 at the right end of the connecting column 1 of the device. Next, unscrew the plug 203 on the injection port 202 on the outer surface of the liquid storage cylinder 201, and add a suitable pretreatment agent, such as degreasing agent or rust remover, into the liquid storage cylinder 201 through the injection port 202. After adding the agent, tighten the plug 203 to seal the liquid storage cylinder 201. Place the device into one end of the steel pipe, so that the two sets of rubber wheels 4 on the outer surface of the connecting column 1 are tightly attached to the inner wall of the steel pipe. Then, simultaneously start the hydraulic telescopic rod 209 of the pretreatment mechanism 2 and the servo motor 302 of the cleaning mechanism 3: the hydraulic telescopic rod 209 drives the top plate 210 and the sealing plug 211 to move to the right, squeezing the pretreatment agent in the liquid storage cylinder 201. The agent enters the pressure equalization chamber 206 through the outlet 204, and is then sprayed onto the inner wall of the steel pipe in a mist form through the spray head 207, completing the pretreatment. The servo motor 302 drives the rotating drum 301 to rotate. The annular steel wire brush 303 on the outer surface of the rotating drum 301 scrapes off the softened dirt surface layer, the annular flexible cotton 304 wipes away tiny dirt particles and residual agent, and the annular magnet 305 attracts metal oxide scale, completing the subsequent cleaning. At this time, the steel wire rope at one end of the steel pipe is pulled, which drives the device to roll along the inner wall of the steel pipe with the rubber wheel 4. During the movement, the pretreatment and cleaning work continuously and simultaneously, forming a spiral cleaning trajectory to ensure that the inner wall of the steel pipe is clean without dead corners. After the device moves to the other end of the steel pipe, the hydraulic telescopic rod 209 and the servo motor 302 are closed, the steel wire rope on the rod connecting ring 5 is untied, and the device is taken out from the other end of the steel pipe, completing the entire cleaning operation.

[0019] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A spiral cleaning device for the inner wall of a steel pipe, comprising a connecting column (1), characterized in that: A pretreatment mechanism (2) is provided on the left side of the connecting column (1), and a cleaning mechanism (3) is provided on the left side of the pretreatment mechanism (2). The pretreatment mechanism (2) includes a liquid storage cylinder (201). A set of equidistant and concentric liquid outlet holes (204) are provided on the right side of the outer surface of the liquid storage cylinder (201). A ring (205) is fixedly connected to the right side of the outer surface of the liquid storage cylinder (201). A pressure equalization chamber (206) is opened on the inner side wall of the ring (205). The pressure equalization chamber (206) is connected to the liquid outlet holes (204). A set of equidistant and concentric spray heads (207) are installed on the outer surface of the pressure equalization chamber (206). A sealing plate (208) is fixedly connected to the left end of the liquid storage cylinder (201). A hydraulic telescopic rod (209) is installed on the right side of the sealing plate (208). A top support plate (210) is fixedly connected to the output end of the hydraulic telescopic rod (209). A sealing plug (211) that mates with the inner wall of the liquid storage cylinder (201) is fixedly installed on the right side of the top support plate (210).

2. The spiral cleaning device for the inner wall of a steel pipe according to claim 1, characterized in that: The right end of the liquid storage cylinder (201) is fixedly connected to the left end of the connecting column (1). The right side of the outer surface of the liquid storage cylinder (201) is provided with a liquid injection port (202) for easy liquid injection. A plug (203) to prevent leakage is installed on the liquid injection port (202).

3. The spiral cleaning device for the inner wall of a steel pipe according to claim 2, characterized in that: The cleaning mechanism (3) includes a rotating cylinder (301), the right end of which is rotatably connected to the left side of the sealing plate (208).

4. The spiral cleaning device for the inner wall of a steel pipe according to claim 3, characterized in that: The rotating cylinder (301) is equipped with a servo motor (302), which is fixedly installed on the left side of the sealing plate (208).

5. The spiral cleaning device for the inner wall of a steel pipe according to claim 4, characterized in that: The output shaft of the servo motor (302) is fixedly connected to the left side wall of the rotating cylinder (301), and an annular wire brush (303) is fixedly installed on the right side of the outer surface of the rotating cylinder (301).

6. The spiral cleaning device for the inner wall of a steel pipe according to claim 5, characterized in that: The working surface of the annular wire brush (303) is in contact with the inner wall of the steel pipe to be treated, and an annular flexible cotton (304) is fixedly installed in the middle of the outer surface of the rotating cylinder (301).

7. The spiral cleaning device for the inner wall of a steel pipe according to claim 6, characterized in that: The working surface of the annular flexible cotton (304) is in contact with the inner wall of the steel pipe to be treated, and an annular magnet (305) is fixedly installed on the left side of the outer surface of the rotating cylinder (301).

8. The spiral cleaning device for the inner wall of a steel pipe according to claim 7, characterized in that: Two sets of symmetrical rubber wheels (4) are fixedly installed on the outer surface of the connecting column (1), and a rod-mounted connecting ring (5) is fixedly installed on the right end of the connecting column (1).

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