A small-diameter steel pipe inner wall coating device

Abstract

The utility model discloses a small diameter steel pipe inner wall coating device, especially relates to coating device technical field, including handle, be provided with coating subassembly on the handle, the coating subassembly includes the material storage cylinder of setting in handle one end, the material outlet of material storage cylinder is provided with the baffle, one side of baffle is provided with the suction cotton. The utility model discloses that the baffle of material cylinder material outlet is opened and sets up several even distribution's shunt, can with the even guiding of coating to the suction cotton, avoids single point coating accumulation, the suction cotton adopts high density sponge, has excellent liquid absorption and liquid retention performance, can slowly release coating, ensures coating process coating continuous, stable supply, avoids broken coating, the cross section of coating plate is set as arc and steel pipe inner wall curvature accurate matching, the wool material coating strip of outside can closely adhere to the inner wall, even coating when moving, prevents the problem such as corner coating or local overthickness, guarantees the inner wall coating integrity.

Description

Technical Field

[0001] This utility model relates to the field of coating equipment technology, and more specifically, to a coating device for the inner wall of a small-diameter steel pipe. Background Technology

[0002] Small-diameter steel pipes are a category of steel pipes classified according to their nominal diameter or outer diameter. There is no absolutely unified diameter threshold in the industry, but steel pipes with a nominal diameter DN≤50mm are usually classified as small-diameter steel pipes.

[0003] Seamless steel pipes are the most common type, used in pressure-bearing and corrosion-resistant applications; some are welded steel pipes (such as galvanized welded pipes), used in low-pressure, non-corrosive environments. The core value of small-diameter steel pipes is "precise delivery" and "adaptability to confined spaces." Common applications include: Industrial applications: hydraulic system piping (transporting hydraulic oil), pneumatic equipment piping (transporting compressed air), precision instrument cooling water pipes, and small molecule media transport pipes in the chemical industry (such as ethanol and solvents). Civil applications: water supply branch pipes in buildings (such as branch pipes in kitchens and bathrooms), heating system branch pipes, and connection pipes after household gas meters. Special applications: drug delivery pipes in medical equipment, and fuel / lubricating oil pipes in automotive engines. Uncoated metal inner walls may leach heavy metals (such as iron and manganese in carbon steel, and nickel in inferior stainless steel) or breed bacteria (for example, the oxide scale crevices on the inner wall of steel pipes are a breeding ground for bacteria). Therefore, a coating device for the inner wall of small-diameter steel pipes is provided. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a coating device for the inner wall of a small-diameter steel pipe, which aims to solve the problems mentioned in the background art.

[0005] This utility model provides the following technical solution: a coating device for the inner wall of a small-diameter steel pipe, characterized in that it includes a handle and a coating component disposed on the handle; The coating assembly includes a material storage cylinder, a flow divider, a suction cotton, an extension rod, a sliding sleeve, a hinge block, a connecting plate, and a coating plate; The storage cylinder is fixedly installed at one end of the handle and is used to store coating paint; The diversion plate is detachably connected to the discharge end of the storage cylinder, and the diversion plate has several diversion ports through which the coating is evenly discharged. The absorbent cotton is detachably connected to the side of the diverter plate away from the storage cylinder, and is used to absorb and slowly release the coating discharged through the diverter port; The extension rod is fixedly disposed in the middle of the absorbent cotton and extends along the axial direction of the storage cylinder; The sliding sleeve is slidably mounted on the extension rod and can slide back and forth along the length of the extension rod; Several hinge blocks are provided and are fixedly connected to the outer side wall of the sliding sleeve; The connecting plate corresponds to the hinge block one by one, and one end of the connecting plate is hinged to the hinge block, and can rotate around the hinge axis of the hinge block; The coating plate is connected to the end of the connecting plate away from the hinge block. Several coating plates are arranged to form an annular structure that fits the inner wall of the small-diameter steel pipe, and are used to coat the inner wall of the steel pipe.

[0006] Optionally, in one possible implementation, the cross-sectional shape of each coating plate is set to arc shape, and a coating strip is fixedly provided on the outer wall of each coating plate. The coating strip is made of wool and is used to evenly apply the coating to the inner wall of the steel pipe. A spring is fitted on the sliding sleeve. One end of the spring abuts against the end of the extension rod near the absorbent cotton, and the other end abuts against the end face of the sliding sleeve near the absorbent cotton. The spring is used to provide a restoring force for the sliding sleeve, so that the sliding sleeve drives the connecting plate and the coating plate to retract. The diverter plate is connected to the storage cylinder and the diverter plate. The coating plate and the absorbent cotton are detachably connected by bolts to ensure connection stability and ease of disassembly. A storage cylinder is fixedly installed at the end of the coating plate away from the absorbent cotton. The storage cylinder has a ring structure, and its inner wall is in contact with the outer wall of the coating strip. The storage cylinder is used to protect the coating strip and prevent damage or paint dripping when not in use. A filling port is opened on the side wall of the storage cylinder, and a feed valve is threaded to the filling port. The feed valve is used to control the opening and closing of the filling port to add paint to the storage cylinder or to seal the storage cylinder. The technical effects and advantages of this utility model are as follows: The coating plate, through a sliding sleeve and a spring, forms a retractable structure: when inserted into the steel pipe, the sliding sleeve is compressed by the end contact with the spring, causing the connecting plate and the coating plate to open, so that the arc-shaped coating plate fits against the inner wall; when removed, the spring returns to its original position, and the coating plate retracts, avoiding jamming with the end of the steel pipe, easily adapting to entry and exit in narrow spaces and coating operations. The distributor plate at the discharge end of the barrel has several evenly distributed distribution ports, which can guide the paint evenly to the absorbent cotton and avoid paint accumulation at single points. The absorbent cotton is made of high-density sponge, which has excellent liquid absorption and retention properties and can slowly release paint to ensure a continuous and stable supply of paint during the coating process and avoid paint interruption. The cross-section of the coating plate is set to be arc-shaped and precisely matched with the curvature of the inner wall of the steel pipe. The wool coating strip on the outside can fit tightly against the inner wall and apply paint evenly when moving, eliminating problems such as missed corners or excessive thickness in some areas and ensuring the integrity of the inner wall coating. Attached Figure Description

[0007] To more clearly illustrate the technical solutions in this disclosure, the accompanying drawings used in some embodiments will be briefly described below. Obviously, the drawings described below are only drawings of some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings. In addition, the drawings described below can be regarded as schematic diagrams and are not intended to limit the actual size of the product, the actual flow of the method, the actual timing of the signals, etc. involved in the embodiments of this disclosure.

[0008] Figure 1 This is a front view of the overall structure of this utility model.

[0009] Figure 2 This is a schematic diagram of the coating component of this utility model.

[0010] Figure 3 This is an exploded view of the coating component of this utility model.

[0011] Figure 4 This is a schematic diagram of the extension rod, sliding sleeve, hinge block, connecting plate, coating plate, coating strip, and spring of this utility model.

[0012] The attached diagram is labeled as follows: 1. Handle; 2. Storage cylinder; 3. Diverter plate; 4. Suction cotton; 5. Extension rod; 6. Sliding sleeve; 7. Hinge block; 8. Connecting plate; 9. Coating plate; 10. Coating strip; 11. Spring; 12. Diverter port; 13. Storage cylinder; 14. Feed valve. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] This embodiment discloses a coating device for the inner wall of small-diameter steel pipes, which aims to solve the problem in the prior art that the inner wall of small-diameter steel pipes is difficult to reach due to the narrow space, and the coating is uneven, which leads to the easy precipitation of heavy metals and the growth of bacteria on the inner wall. The device achieves efficient and uniform coating of the inner wall of small-diameter steel pipes, thereby improving the protective performance of the inner wall of the steel pipe.

[0015] Specifically, such as Figure 1 As shown, the small-diameter steel pipe inner wall coating device includes a handle 1, which is made of engineering plastic material and has anti-slip texture on its surface to facilitate the operator's grip and prevent hand slippage during the coating process from affecting operational stability. A coating assembly is mounted on the handle 1, which is the core structure for achieving the coating of the steel pipe inner wall.

[0016] like Figure 2 As shown, the coating assembly includes a material storage cylinder 2 located at one end of the handle 1. The material storage cylinder 2 has a cylindrical structure. The volume of the material storage cylinder 2 can be designed according to actual coating needs. In this embodiment, the volume of the material storage cylinder 2 is 500ml, which can meet the amount of paint needed for coating the inner wall of a small-diameter steel pipe with a length of 2-3CM in a single application. A feed valve 14 for adding paint is provided on the material storage cylinder 2. The feed valve 14 is threadedly connected to the material storage cylinder 2. This connection method allows the operator to easily open the feed valve 14 to add paint to the material storage cylinder 2, while also ensuring the airtightness of the material storage cylinder 2 to prevent paint leakage during storage.

[0017] The discharge end of the storage cylinder 2 is equipped with a diversion plate 3, such as... Figure 3 As shown, the diverter plate 3 is a circular metal plate with a diameter matching the inner diameter of the storage cylinder 2. Several diverter ports 12 are evenly distributed on the diverter plate 3, each with a diameter of 3mm, allowing the paint in the storage cylinder 2 to flow out evenly through the ports 12. The diverter plate 3 is detachably connected to the absorbent cotton 4 and the storage cylinder 2 by bolts. This connection method facilitates the operator's disassembly, replacement, cleaning, and maintenance of the diverter plate 3 and the absorbent cotton 4.

[0018] A suction cotton 4 is provided on one side of the diversion plate 3. The suction cotton 4 is made of high-density sponge material, which has good liquid absorption and retention properties. It can fully absorb the paint flowing out from the diversion port 12 and slowly release the paint during the subsequent coating process to ensure the continuity and uniformity of the coating.

[0019] like Figure 4 As shown, an extension rod 5 is provided in the middle of the absorbent cotton 4. Its length can be adjusted according to the length of the small-diameter steel pipe, which can meet the coating requirements of the inner wall of small-diameter steel pipes of common length.

[0020] A sliding sleeve 6 is slidably connected to the extension rod 5. The sliding sleeve 6 is a circular metal sleeve, the inner diameter of which matches the outer diameter of the extension rod 5, allowing it to slide smoothly on the extension rod 5. A spring 11 is provided on the sliding sleeve 6, with one end of the spring 11 abutting against the end of the extension rod 5. The spring 11 is made of stainless steel, which has good elasticity and fatigue resistance, and can provide a restoring force for the sliding sleeve 6.

[0021] Several hinge blocks 7 are fixedly installed on the outer side of the sliding sleeve 6, and are evenly distributed on the outer side of the sliding sleeve 6. Connecting plates 8 are hinged to the multiple hinge blocks 7, and the connecting plates 8 can rotate flexibly around the hinge blocks 7. A coating plate 9 is provided at one end of each pair of adjacent connecting plates 8. The cross-sectional shape of the multiple coating plates 9 is set to be arc-shaped, and the curvature of the arc is adapted to the curvature of the inner wall of common small-diameter steel pipes.

[0022] Coating strips 10 are provided on the outer side of the coating plate 9. The coating strips 10 are made of wool, which has good paint absorption capacity and coating effect, and can evenly apply the paint released by the absorbent cotton 4 to the inner wall of the steel pipe. A storage cylinder 13 is provided at the end of the coating plate 9 away from the absorbent cotton 4. The outer side of the coating strips 10 extends to the inner wall of the storage cylinder 13. The storage cylinder 13 can protect the coating strips 10, prevent the coating strips 10 from being damaged in the non-coating state, and also prevent the paint from dripping in the non-coating state. The specific working principle is as follows: First, the operator adds an appropriate amount of paint to the storage cylinder 2 through the feed valve 14, and then closes the feed valve 14 after adding the paint. Next, the coating assembly is inserted into the steel pipe. During insertion, the sliding sleeve 6 slides along the extension rod 5 towards the suction cotton 4 under the action of the steel pipe end, and the spring 11 is compressed. As the sliding sleeve 6 slides, the connecting plate 8 rotates around the hinge block 7, causing the coating plate 9 to open outward, so that the coating strip 10 fits tightly against the inner wall of the steel pipe.

[0023] Once the coating assembly reaches the desired coating position on the inner wall of the steel pipe, the operator holds handle 1 and slowly pulls or pushes the device. During this movement, the paint in the storage cylinder 2 flows into the suction cotton 4 through the diversion port 12 on the diversion plate 3. The suction cotton 4 slowly releases the paint, which then permeates onto the coating strip 10. As the coating strip 10 moves relative to the inner wall of the steel pipe, it evenly coats the inner wall with paint. After coating is complete, the device is removed from the steel pipe. During removal, the spring 11 returns to its original position, pushing the sliding sleeve 6 to slide away from the suction cotton 4 along the extension rod 5. The connecting plate 8 causes the coating plate 9 to retract inward, facilitating the smooth removal of the device.

[0024] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A coating device for the inner wall of a small-diameter steel pipe, characterized in that, Includes a handle (1) and a painting assembly disposed on the handle (1); The coating assembly includes a material storage cylinder (2), a flow divider (3), a suction cotton (4), an extension rod (5), a sliding sleeve (6), a hinge block (7), a connecting plate (8), and a coating plate (9); The storage cylinder (2) is fixedly installed at one end of the handle (1) and is used to store coating materials; The diversion plate (3) is detachably connected to the discharge end of the storage cylinder (2), and the diversion plate (3) has several diversion ports (12) for uniformly discharging the coating. The absorbent cotton (4) is detachably connected to the side of the diverter plate (3) away from the storage cylinder (2) for absorbing and slowly releasing the coating material discharged through the diverter port (12); The extension rod (5) is fixedly disposed in the middle of the absorbent cotton (4) and extends along the axial direction of the storage cylinder (2); The sliding sleeve (6) is slidably sleeved on the extension rod (5) and can slide back and forth along the length direction of the extension rod (5); The hinge block (7) is provided in several parts and is fixedly connected to the outer side wall of the sliding sleeve (6); The connecting plate (8) corresponds one-to-one with the hinge block (7). One end of the connecting plate (8) is hinged to the hinge block (7) and can rotate around the hinge axis of the hinge block (7). The coating plate (9) is connected to the end of the connecting plate (8) away from the hinge block (7). Several coating plates (9) are enclosed to form an annular structure that is adapted to the inner wall of the small-diameter steel pipe, and are used to coat the inner wall of the steel pipe.

2. The small-diameter steel pipe inner wall coating device according to claim 1, characterized in that: Each of the coating plates (9) has an arc-shaped cross-section, and each of the coating plates (9) has a coating strip (10) fixedly installed on its outer side wall. The coating strip (10) is made of wool and is used to evenly apply the coating to the inner wall of the steel pipe.

3. The small-diameter steel pipe inner wall coating device according to claim 1, characterized in that: A spring (11) is fitted on the sliding sleeve (6). One end of the spring (11) abuts against the end of the extension rod (5) near the absorbent cotton (4), and the other end abuts against the end face of the sliding sleeve (6) near the absorbent cotton (4). The spring (11) is used to provide a restoring force for the sliding sleeve (6), so that the sliding sleeve (6) drives the connecting plate (8) and the coating plate (9) to retract.

4. The small-diameter steel pipe inner wall coating device according to claim 1, characterized in that: The diverter plate (3) and the storage cylinder (2), as well as the diverter plate (3) and the absorbent cotton (4), are detachably connected by bolts to ensure the stability of the connection and the ease of disassembly.

5. The small-diameter steel pipe inner wall coating device according to claim 2, characterized in that: A storage tube (13) is fixedly provided at one end of the coating plate (9) away from the absorbent cotton (4). The storage tube (13) has an annular structure and its inner wall is in contact with the outer wall of the coating strip (10). The storage tube (13) is used to protect the coating strip (10) to prevent the coating strip (10) from being damaged or the paint from dripping when it is not being coated.

6. The small-diameter steel pipe inner wall coating device according to claim 1, characterized in that: The storage cylinder (2) has a material inlet on its side wall, and a feed valve (14) is threadedly connected to the material inlet. The feed valve (14) is used to control the opening and closing of the injection port, so as to add paint into the storage cylinder (2) or seal the storage cylinder (2).

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