A coating device for the inner coating of pipes

Abstract

This utility model relates to the field of pipeline spraying technology, and particularly to a coating device for the inner coating of pipelines. It includes a fixed disc, a pushing mechanism fixedly connected to the upper left end of the fixed disc, a fixed rod fixedly connected to the middle right end of the fixed disc, an auxiliary component fixedly connected to the right side of the outer surface of the fixed rod, and a spraying device fixedly connected to the right end of the fixed rod. A coating tube is interlocked between the lower left end of the fixed disc, the lower left end of the pushing mechanism, and the lower left end of the spraying device. A solenoid valve is installed on the outer surface of the coating tube. This pipeline inner coating device, through the linkage of the pushing mechanism and the auxiliary component, enables the radial extension and retraction of the drive wheel to adapt to pipelines of different diameters. Simultaneously, twelve equally spaced spray pipes and nozzles ensure uniform coating, improving equipment adaptability and coating quality.

Description

Technical Field

[0001] This utility model relates to the field of pipeline spraying technology, and in particular to a coating device for the inner coating of pipelines. Background Technology

[0002] In pipeline transportation systems for oil, natural gas, water supply and drainage, anti-corrosion, wear-resistant, or other functional coatings are typically applied to the inner walls of pipelines to extend their service life and improve transportation efficiency. Currently, the application of these inner coatings often involves manual handheld spraying equipment or simple automated coating devices. Manual application suffers from high labor intensity, harsh working environments (confined space and poor ventilation within the pipeline), low efficiency, and difficulty in ensuring coating uniformity. Traditional automated coating devices often have the following shortcomings: firstly, poor adaptability to pipeline diameters, making stable operation in pipelines of different specifications difficult; secondly, unreasonable spraying mechanism design, leading to uneven coating thickness and missed spraying; and thirdly, complex drive mechanisms, cumbersome operation for entering and exiting the pipeline, and insufficient stability during movement within the pipeline, resulting in tilting or jamming, affecting coating quality and construction progress. Therefore, it is necessary to design a pipeline inner coating application device to solve these problems. Utility Model Content

[0003] The main objective of this invention is to provide a coating device for the inner coating of pipes, which can effectively solve the problems in the background art.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A coating device for the inner coating of a pipe includes a fixed plate. A pushing mechanism is fixedly connected to the upper left end of the fixed plate, and a fixed rod is fixedly connected to the middle right end of the fixed plate. An auxiliary component is fixedly connected to the right side of the outer surface of the fixed rod, and a spraying device is fixedly connected to the right end of the fixed rod. A coating tube is inserted and connected to the lower left end of the fixed plate, the lower left end of the pushing mechanism, and the lower left end of the spraying device. A solenoid valve is provided on the outer surface of the coating tube.

[0006] Preferably, the pushing mechanism includes an electric push rod, the output end of which passes through the fixed disk and is fixedly connected to a first connecting plate. Long linkage plates are movably connected to the outer perimeter of the first connecting plate via rotating shafts. A first movable shaft and a second movable shaft are respectively inserted into the upper left and upper right portions of the long linkage plates. A first short linkage plate is fixedly connected to the outer surface of the second movable shafts. A first drive wheel is provided on one side of each of the four first short linkage plates. A second connecting plate is movably mounted on the other end of each first short linkage plate via a rotating shaft. Pipe holes are opened at the lower left end of both the first and second connecting plates. The electric push rod is fixedly connected to the upper left end of the fixed disk.

[0007] Preferably, the auxiliary component includes a third connecting plate, and second short linkage plates are movably mounted on all four sides of the outer side of the third connecting plate via rotating shafts. Second drive wheels are provided on the other side of each of the second short linkage plates, and the third connecting plate is fixedly connected to the right side of the outer surface of the fixed rod.

[0008] Preferably, the spraying device includes a material tray box, and twelve spray pipes are interspersed on the outer surface of the material tray box. Each spray pipe is fixedly connected to a nozzle at its other end, and the material tray box is fixedly connected to the right end of the fixing rod.

[0009] Preferably, the spray nozzles are distributed in a ring at equal intervals around the material tray box, and each spray nozzle is connected to the paint tube through the material tray box.

[0010] Preferably, the first connecting plate and the second connecting plate are movably connected to the left side of the outer surface of the fixed rod, the four long linkage plates are distributed in a ring at equal intervals with the first connecting plate as the center, and the four first short linkage plates are distributed in a ring at equal intervals with the second connecting plate as the center.

[0011] Preferably, the four second short linkage plates are distributed in a ring at equal intervals around the third connecting plate, and the length of the second short linkage plates is the same as the length of the first short linkage plate.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. In this utility model, the radial extension and retraction of the drive wheel is achieved by the linkage structure of the pushing mechanism and the auxiliary component. When the electric push rod pushes the first connecting plate to move along the fixed rod, the long linkage plate drives the first short linkage plate and the first drive wheel to unfold or retract. At the same time, the second drive wheel of the auxiliary component adjusts its radial position synchronously through the same principle. This design enables the equipment to adapt to pipes with different inner diameters.

[0014] 2. In this utility model, the spraying device adopts a structure in which twelve spray pipes are distributed in a ring at equal intervals around the material tray box. After the paint enters the material tray box through the paint pipe, it is evenly distributed to each nozzle through the ring at equal intervals, covering the entire circumference of the pipe in a conical spray pattern. During the movement of the equipment, multiple nozzles spray synchronously, avoiding the circumferential thickness difference of traditional single-point spraying. This is especially advantageous in large-diameter pipes, ensuring consistent coating thickness, solving the technical problem of insufficient coating uniformity, and improving coating quality. Attached Figure Description

[0015] Figure 1 This is a first-view structural schematic diagram of a coating device for an inner coating of a pipe according to the present invention.

[0016] Figure 2 This is a second-view structural schematic diagram of a coating device for an inner coating of a pipe according to the present invention.

[0017] Figure 3 This is a schematic diagram of the pushing mechanism of a coating device for an inner coating of a pipe according to the present invention.

[0018] Figure 4 This is a schematic diagram of the auxiliary component structure of a pipe internal coating application device according to the present invention;

[0019] Figure 5 This is a schematic diagram of the spraying device structure of a coating equipment for the inner coating of a pipe according to the present invention.

[0020] In the diagram: 1. Fixed plate; 2. Paint pipe; 3. Solenoid valve; 4. Spraying device; 5. Auxiliary component; 6. Pushing mechanism; 7. Fixed rod; 61. Electric push rod; 62. First connecting plate; 63. First movable shaft; 64. Long linkage plate; 65. Pipe hole; 66. Second connecting plate; 67. Second movable shaft; 68. First short linkage plate; 69. First drive wheel; 51. Third connecting plate; 52. Second short linkage plate; 53. Second drive wheel; 41. Material tray box; 42. Spray pipe; 43. Spray head. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0022] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] Please see Figure 1-5 This utility model provides a technical solution:

[0025] A coating device for the inner coating of a pipe includes a fixed plate 1. A pushing mechanism 6 is fixedly connected to the upper left end of the fixed plate 1. A fixed rod 7 is fixedly connected to the middle right end of the fixed plate 1. An auxiliary component 5 is fixedly connected to the right side of the outer surface of the fixed rod 7. A spraying device 4 is fixedly connected to the right end of the fixed rod 7. A coating pipe 2 is inserted and connected to the lower left end of the fixed plate 1, the lower left end of the pushing mechanism 6, and the lower left end of the spraying device 4. A solenoid valve 3 is provided on the outer surface of the coating pipe 2.

[0026] In this embodiment, the pushing mechanism 6 includes an electric push rod 61. The output end of the electric push rod 61 passes through the fixed plate 1 and is fixedly connected to a first connecting plate 62. Long linkage plates 64 are movably connected to the outer periphery of the first connecting plate 62 via rotating shafts. A first movable shaft 63 and a second movable shaft 67 are respectively inserted and connected to the upper left and upper right portions of the long linkage plates 64. A first short linkage plate 68 is fixedly connected to the outer surface of the second movable shaft 67. A first drive wheel 69 is provided on one side of each of the four first short linkage plates 68. A second connecting plate 66 is movably mounted on the other end of each first short linkage plate 68 via a rotating shaft. Pipe holes 65 are opened at the lower left ends of both the first connecting plate 62 and the second connecting plate 66. The electric push rod 61 is fixedly connected to... The auxiliary component 5, attached to the upper left end of the fixed plate 1, includes a third connecting plate 51. Second short linkage plates 52 are movably mounted on the outer periphery of the third connecting plate 51 via rotating shafts. Second drive wheels 53 are provided on the other side of each of the second short linkage plates 52. The third connecting plate 51 is fixedly connected to the right side of the outer surface of the fixed rod 7. The first connecting plate 62 and the second connecting plate 66 are movably connected to the left side of the outer surface of the fixed rod 7. Four long linkage plates 64 are equidistantly distributed in a ring around the first connecting plate 62. Four first short linkage plates 68 are equidistantly distributed in a ring around the second connecting plate 66. Four second short linkage plates 52 are equidistantly distributed in a ring around the third connecting plate 51. The length of the second short linkage plate 52 is the same as the length of the first short linkage plate 68.

[0027] Through the above scheme: When the equipment is working, the electric push rod 61 of the pushing mechanism 6 is activated, and its output end pushes the first connecting plate 62 forward along the left side of the outer surface of the fixed rod 7. Through the linkage of the long linkage plate 64, the first short linkage plate 68 drives the first drive wheel 69 to unfold outward and abut against the inner wall of the pipe. The electric push rod 61 continues to work to push the equipment forward. The second drive wheel 53 of the auxiliary component 5 contacts the inner wall of the pipe, supporting the balance of the equipment and assisting in its movement. The paint is transported through the paint pipe 2, and the solenoid valve 3 controls the on / off state. The paint is distributed to the twelve spray pipes 42 through the material tray box 41 and evenly sprayed by the nozzles 43. The equipment moves and sprays simultaneously while the inner wall of the sprayed pipe is being coated. After the operation is completed, the electric push rod 61 retracts and the first drive wheel 69 is retracted to allow the equipment to be removed. The radial extension and retraction of the drive wheel is achieved through the linkage structure of the pushing mechanism 6 and the auxiliary component 5, which can adapt to pipes with different inner diameters. The twelve spray nozzles 42 are distributed in a ring at equal intervals to ensure that the circumferential coating thickness is consistent. The first drive wheel 69 and the second drive wheel 53 form multi-point support to prevent the equipment from tilting or shaking inside the pipe. The electric push rod 61 controls the first drive wheel 69 and the second drive wheel 53 to unfold or retract, simplifying the process of the equipment entering and leaving the pipe.

[0028] In this embodiment, the spraying device 4 includes a material tray box 41. Twelve spray pipes 42 are interspersed on the outer surface of the material tray box 41. The other end of each spray pipe 42 is fixedly connected to a nozzle 43. The material tray box 41 is fixedly connected to the right end of the fixing rod 7. The spray pipes 42 are distributed in a ring at equal intervals around the material tray box 41. All spray pipes 42 are connected to the inside of the paint pipe 2 through the material tray box 41.

[0029] Through the above scheme: the paint is transported to the material tray box 41 through the paint pipe 2. Since the spray pipes 42 are distributed in a ring with equal spacing around the material tray box 41 and are connected to the inside of the material tray box 41, the paint is evenly distributed to the twelve spray pipes 42 under pressure. Then, it is sprayed onto the inner wall of the pipe in a conical spray form through the nozzles 43. When the equipment moves along the axial direction of the pipe under the action of the pushing mechanism 6, the nozzles 43 continuously spray, forming a continuous and complete coating. Through the ring-shaped distribution of the twelve spray pipes 42, the entire circumference of the pipe is covered, avoiding the uneven thickness caused by traditional single-point spraying. Multiple nozzles 43 work at the same time, increasing the spraying area per unit time and shortening the construction cycle.

[0030] It should be noted that this utility model is a coating device for the inner coating of a pipe. When the device needs to enter the pipe for coating operations, the electric push rod 61 in the pushing mechanism 6 is first activated. The output end of the electric push rod 61 extends forward, pushing the first connecting plate 62 forward along the left side of the outer surface of the fixed rod 7. Since the outer perimeter of the first connecting plate 62 is movably connected to the long linkage plate 64 through a rotating shaft, the four long linkage plates 64, which are distributed in a ring at equal intervals, rotate around the rotating shaft. The first movable shaft 63 on the left side of the upper end of the long linkage plate 64 and the second movable shaft 67 on the right side are synchronously displaced, driving the first short linkage plate 68 fixed on the outer surface of the second movable shaft 67 to move. A first short linkage plate 68, equidistantly distributed in a ring around the second connecting plate 66, is movably connected to the second connecting plate 66 via a rotating shaft. Driven by the long linkage plate 64, the first short linkage plates 68 cause the first drive wheel 69 to extend outwards, pressing it against the inner wall of the pipe. At this time, the electric push rod 61 continues to operate, using the friction between the first drive wheel 69 and the inner wall of the pipe to propel the entire device forward within the pipe. During this forward movement, the auxiliary component 5 provides support and assists in the movement. The third connecting plate 51 is fixedly sleeved on the right side of the outer surface of the fixed rod 7, and its outer perimeter is connected to four second short linkage plates equidistantly distributed in a ring via a rotating shaft. The movable plate 52 is connected to the second drive wheel 53 on the other side of the second short linkage plate 52, which is always in contact with the inner wall of the pipe. This not only supports the equipment to maintain balance, but also assists the pushing mechanism 6 to make the equipment move more stably in the pipe. The second short linkage plate 52 is the same length as the first short linkage plate 68, ensuring that the force on each part of the equipment is uniform during the movement. At the same time, the paint is delivered through the paint pipe 2. The paint pipe 2 passes through the pipe hole 65 at the lower left end of the fixed plate 1 and then extends to the lower left end of the spraying device 4, communicating with the inside of the material tray box 41. The solenoid valve 3 on the outer surface of the paint pipe 2 controls the flow of paint. When the equipment moves to the designated coating position... When the solenoid valve 3 is opened, the paint enters the material tray box 41 through the paint pipe 2, and then is sprayed out from the nozzle 43 at the other end of the twelve spray pipes 42 that are equidistantly distributed in a ring around the material tray box 41, so as to evenly coat the inner wall of the pipe. The movement of the equipment in the pipe and the spraying process can be carried out simultaneously. Through the coordinated action of the pushing mechanism 6 and the auxiliary components 5, the equipment moves smoothly in the pipe. At the same time, the spraying device 4 sprays continuously to achieve continuous coating operation in the pipe. When the coating is completed, the solenoid valve 3 is closed to stop the paint delivery. The electric push rod 61 retracts and drives the first drive wheel 69 to retract inward, so as to facilitate the removal of the equipment from the pipe.

[0031] 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 coating device for the inner coating of a pipe, comprising a fixed plate (1), characterized in that: A pushing mechanism (6) is fixedly connected to the upper left end of the fixed plate (1), a fixed rod (7) is fixedly connected to the middle right end of the fixed plate (1), an auxiliary component (5) is fixedly connected to the right side of the outer surface of the fixed rod (7), a spraying device (4) is fixedly connected to the right end of the fixed rod (7), a paint tube (2) is inserted and connected to the lower left end of the fixed plate (1), the lower left end of the pushing mechanism (6), and the lower left end of the spraying device (4), and a solenoid valve (3) is provided on the outer surface of the paint tube (2).

2. The coating equipment for an inner coating of a pipe according to claim 1, characterized in that: The pushing mechanism (6) includes an electric push rod (61). The output end of the electric push rod (61) passes through the fixed disk (1) and is fixedly connected to a first connecting plate (62). The outer periphery of the first connecting plate (62) is movably connected to a long linkage plate (64) via a rotating shaft. The upper left and upper right parts of the long linkage plate (64) are respectively connected to a first movable shaft (63) and a second movable shaft (67). The outer surface of the second movable shaft (67) is fixedly connected to a first short linkage plate (68). A first drive wheel (69) is provided on one side of each of the four first short linkage plates (68). The other end of each of the first short linkage plates (68) is movably mounted to a second connecting plate (66) via a rotating shaft. The lower left part of the first connecting plate (62) and the lower left part of the second connecting plate (66) are both provided with pipe holes (65). The electric push rod (61) is fixedly connected to the upper left part of the fixed disk (1).

3. The coating equipment for an inner coating of a pipe according to claim 1, characterized in that: The auxiliary component (5) includes a third connecting plate (51). A second short linkage plate (52) is movably mounted on the outer periphery of the third connecting plate (51) via a rotating shaft. A second drive wheel (53) is provided on the other side of each of the second short linkage plates (52). The third connecting plate (51) is fixedly connected to the right side of the outer surface of the fixed rod (7).

4. The coating equipment for an inner coating of a pipe according to claim 1, characterized in that: The spraying device (4) includes a material tray box (41), and twelve spray pipes (42) are interspersed on the outer surface of the material tray box (41). The other end of each spray pipe (42) is fixedly connected to a nozzle (43). The material tray box (41) is fixedly connected to the right end of the fixing rod (7).

5. The coating equipment for an inner coating of a pipe according to claim 4, characterized in that: The nozzles (42) are distributed in a ring at equal intervals around the material tray box (41), and all nozzles (42) are connected to the inside of the paint tube (2) through the material tray box (41).

6. The coating equipment for an inner coating of a pipe according to claim 2, characterized in that: The first connecting plate (62) and the second connecting plate (66) are movably connected to the left side of the outer surface of the fixed rod (7). The four long linkage plates (64) are distributed in a ring at equal intervals with the first connecting plate (62) as the center, and the four first short linkage plates (68) are distributed in a ring at equal intervals with the second connecting plate (66) as the center.

7. The coating equipment for an inner coating of a pipe according to claim 3, characterized in that: The four second short linkage plates (52) are distributed in a ring at equal intervals with the third connecting plate (51) as the center, and the length of the second short linkage plate (52) is the same as the length of the first short linkage plate (68).

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