Plastic coating device for inner wall of steel pipe

Abstract

The utility model relates to the technical field of plastic coating devices, and discloses a steel pipe inner wall plastic coating device which comprises a bottom plate, a rack is fixedly installed in the middle of the top of the bottom plate, and a feeding box is fixedly installed at one end of the top of the bottom plate. According to the steel pipe inner wall plastic coating device, in order to better carry out plastic coating on the inner wall of a steel pipe body, a plastic coating assembly is arranged, when an asynchronous motor is started, a supporting hydraulic cylinder can rotate in cooperation with a transmission piece, the steel pipe body can be steered and vertically moved in cooperation with an elastic clamping plate, and a transverse linear module vertically moves in cooperation with a vertical linear module; the asynchronous motor can move transversely in cooperation with the transverse linear module, the spray gun can rotate in cooperation with the asynchronous motor, the spray gun drives a material conveying hole and a flexible coating piece to enter the steel pipe body, the inner wall of one end of the flexible coating piece is subjected to plastic coating, and after the steel pipe body is taken down and reversely installed, the inner wall of the other end of the steel pipe body can be subjected to plastic coating; and the inner wall of the steel pipe body with more lengths and inner diameters can be better coated with plastic.

Description

Technical Field

[0001] This utility model relates to the technical field of plastic coating devices, specifically a plastic coating device for the inner wall of a steel pipe. Background Technology

[0002] In many industrial sectors, such as building water supply and drainage, petrochemicals, and power, steel pipes are widely used as important transportation pipelines. However, during use, the inner wall of steel pipes is easily affected by corrosion and wear of the transported medium, which leads to a shortened service life, reduced transportation efficiency, and even safety hazards.

[0003] To address these issues, the technology of coating the inner wall of steel pipes with plastic has emerged. By coating the inner wall of steel pipes with a plastic coating that has properties such as corrosion resistance and wear resistance, the overall performance of steel pipes can be significantly improved. In the early days, for small-diameter steel pipes, manual coating was often used. Workers would apply the coating to the inner wall of the steel pipe using tools such as brushes or spray guns. This method was extremely inefficient, and the coating thickness was uneven, making it difficult to guarantee the quality.

[0004] Currently, most plastic coating devices can only coat steel pipes of specific lengths and diameters. For steel pipes of different diameters and lengths, it is necessary to frequently replace equipment parts or adjust the plastic coating process parameters. This results in poor equipment versatility, limited applicability, and a lower degree of automation, which reduces overall production efficiency. Furthermore, it is impossible to clean the inside of the steel pipe before coating to achieve better coating results. Therefore, we propose a plastic coating device for the inner wall of steel pipes. Utility Model Content

[0005] The purpose of this invention is to provide a plastic coating device for the inner wall of steel pipes to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A steel pipe inner wall plastic coating device includes a base plate, a frame fixedly installed at the top center of the base plate, a material supply box fixedly installed at one end of the top of the base plate, an output end of the material supply box fixedly connected to one end of a conveying hose, a spray gun fixedly connected to the other end of the conveying hose, a bracket fixedly installed on the upper surface of the bottom end of the frame, and a plastic coating assembly provided at the top of the base plate. The plastic coating assembly includes:

[0008] An asynchronous motor is fixedly installed at the other end of the top of the base plate. The output shaft of the asynchronous motor is fixedly installed inside one end of the transmission component. A fixed end of a supporting hydraulic cylinder is rotatably installed inside the bracket. The other end of the transmission component is fixedly connected to the outer wall of the fixed end of the supporting hydraulic cylinder. An elastic clamping plate is fixedly installed at the piston end of the top of the supporting hydraulic cylinder. A steel pipe body is clamped inside the elastic clamping plate.

[0009] A vertical linear module is fixedly installed on the upper surface of the bottom end of the bracket. A horizontal linear module is fixedly installed on the outer wall of the sliding component on the vertical linear module. An asynchronous motor is fixedly installed on the outer wall of the sliding component on the horizontal linear module. The output end of the asynchronous motor is fixedly connected to the arc-shaped outer wall of the spray gun.

[0010] The spray gun has a through-hole on the arc-shaped sidewall at the end away from the asynchronous motor, and a flexible coating sheet is fixedly installed on the outer wall of the end away from the asynchronous motor. The flexible coating sheet has multiple paint extrusion holes, and the extrusion holes are connected to the feed hole.

[0011] Preferably, the feeding box contains plastic coating material, and the feeding box is equipped with an inlet and a discharge pump, and the conveying hose is connected to the discharge pump, thereby improving the material supply.

[0012] Preferably, the transmission component includes two transmission wheels and a transmission belt, and the two transmission wheels are respectively fixedly connected to the outside of the output shaft of the asynchronous motor and the fixed end of the supporting hydraulic cylinder.

[0013] Preferably, the frame is provided with a cleaning component, which includes a top hydraulic cylinder. The top hydraulic cylinder is fixedly connected to the inner wall of the top of the frame. A slider is fixedly installed at the piston end of the bottom of the top hydraulic cylinder. The slider is slidably installed inside the frame. A dust suction component is fixedly installed on the outer wall of the slider. The dust suction component is provided with a filter and a collector inside, so as to better collect debris and dust.

[0014] Preferably, the bottom of the vacuum cleaner is fixedly connected to the center of the top of the cross frame, an asynchronous servo motor is fixedly installed on the outer wall of the cross frame, a bidirectional threaded rod is fixedly installed at the output end of the asynchronous servo motor, the bidirectional threaded rod is rotatably installed on the cross frame, a threaded block is threadedly installed on the bidirectional threaded rod, the outer wall of the top of the threaded block slides against the inner wall of the cross frame, a baffle is fixedly installed on the outer wall of the bottom end of the threaded block, and a vacuum hose is fixedly installed between the center of the baffle and the input end of the vacuum cleaner.

[0015] Preferably, there are two sets of the threaded block, baffle and suction hose, and both sets of the threaded block, baffle and suction hose are mirrored at both ends of the bidirectional threaded rod with the vertical center line of the bidirectional threaded rod as the mirror axis, so as to better suck out debris and dust.

[0016] Compared with the prior art, this utility model provides a device for coating the inner wall of a steel pipe with plastic, which has the following features:

[0017] Beneficial effects:

[0018] 1. This steel pipe inner wall coating device, in order to better coat the inner wall of the steel pipe body, is equipped with a coating component. When the asynchronous motor is started, the transmission component enables the supporting hydraulic cylinder to rotate, thereby enabling the steel pipe body to turn and move up and down in conjunction with the elastic clamp. The vertical linear module enables the horizontal linear module to move up and down, and the horizontal linear module enables the asynchronous motor to move laterally. The asynchronous motor also enables the spray gun to rotate, thereby allowing the spray gun to drive the material feeding hole and flexible coating sheet into the interior of the steel pipe body, coating the inner wall of one end of the latter. After the steel pipe body is removed and installed in reverse, the inner wall of the other end can be coated, thus enabling better coating of the inner wall of steel pipe bodies with greater length and inner diameter.

[0019] 2. To improve the coating effect, the inner wall coating device for this steel pipe is equipped with a cleaning component. Before the coating component starts working, the top hydraulic cylinder is activated, causing the slider to move the dust collection component up and down. The asynchronous servo motor on the crossbeam is activated, causing the bidirectional threaded rod to rotate. This causes the two sets of threaded blocks to bring the baffles closer together until they are in contact with both ends of the steel pipe body. In conjunction with the dust collection hose, the inside of the steel pipe body is vacuumed to prevent debris and dust from adhering to its inner wall and affecting the coating effect of the coating component. This results in a better coating effect and can also accommodate steel pipe bodies of more lengths. Attached Figure Description

[0020] Figure 1 This is a top view of the overall structure of the present invention.

[0021] Figure 2 This is a top view of the overall structure of this utility model from another frontal perspective;

[0022] Figure 3 This utility model Figure 2 Enlarged structural diagram of region A in the middle;

[0023] Figure 4 This is a schematic diagram of the structure of the plastic-coated component of this utility model;

[0024] Figure 5 This is a top view of the overall structure of the back of this utility model.

[0025] In the diagram: 1. Base plate; 2. Frame; 3. Feed box; 4. Material conveying hose; 5. Spray gun; 6. Support; 7. Coating assembly; 71. Asynchronous motor; 72. Transmission component; 73. Supporting hydraulic cylinder; 74. Elastic clamp; 75. Steel pipe body; 76. Vertical linear module; 77. Horizontal linear module; 78. Asynchronous motor; 79. Material conveying hole; 710. Flexible coating sheet; 8. Cleaning assembly; 81. Top hydraulic cylinder; 82. Slider; 83. Dust collection component; 84. Cross frame; 85. Asynchronous servo motor; 86. Bidirectional threaded rod; 87. Threaded block; 88. Baffle; 89. Dust collection hose. Detailed Implementation

[0026] 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.

[0027] In this application, the term "above" indicates the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. It is primarily used to better describe this application and its embodiments, and is not intended to limit the indicated device, element, or component to having a specific orientation, or to construct and operate in a specific orientation. Furthermore, the term "above" may also be used in certain circumstances to indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances.

[0028] Please see Figure 1 - Figure 5 This utility model provides a technical solution:

[0029] A steel pipe inner wall plastic coating device includes a base plate 1, a frame 2 fixedly installed at the top center of the base plate 1, a feeding box 3 fixedly installed at one end of the top of the base plate 1, and a conveying hose 4 fixedly connected to the output end of the feeding box 3. In addition, the feeding box 3 contains plastic coating material, and the feeding box 3 is equipped with an inlet and an outlet pump. The conveying hose 4 is connected to the outlet pump for better material supply. The other end of the conveying hose 4 is fixedly connected to one end of a spray gun 5. A bracket 6 is fixedly installed on the upper surface of the bottom end of the frame 2. When the inlet of the feeding box 3 is opened, the plastic coating material is poured in. After the loading is completed, the inlet is closed to prevent material leakage and external contaminants from entering. One end of the conveying hose 4 is connected to the outlet pump interface of the feeding box 3, and the other end is connected to the inlet port of the spray gun 5.

[0030] In one embodiment of this utility model, a plastic coating assembly 7 is provided at the top of the base plate 1. The plastic coating assembly 7 includes an asynchronous motor 71. The asynchronous motor 71 is fixedly installed at the other end of the top of the base plate 1. The output shaft of the asynchronous motor 71 is fixedly installed inside one end of the transmission component 72. The fixed end of the support hydraulic cylinder 73 is rotatably installed inside the bracket 6. The other end of the transmission component 72 is fixedly connected to the outer wall of the fixed end of the support hydraulic cylinder 73. In addition, the transmission component 72 includes two transmission wheels and a transmission belt. The two transmission wheels are respectively fixedly connected to the output shaft of the asynchronous motor 71 and the outside of the fixed end of the support hydraulic cylinder 73. An elastic clamping plate 7 is fixedly installed at the piston end of the top of the support hydraulic cylinder 73. 4. A steel pipe body 75 is clamped inside the elastic clamp 74. A vertical linear module 76 is fixedly installed on the upper surface of the bottom end of the bracket 6. A horizontal linear module 77 is fixedly installed on the outer wall of the sliding part on the vertical linear module 76. An asynchronous motor 78 is fixedly installed on the outer wall of the sliding part on the horizontal linear module 77. The output end of the asynchronous motor 78 is fixedly connected to the arc-shaped outer wall of the spray gun 5. A through material feeding hole 79 is opened on the arc-shaped side wall of the end of the spray gun 5 away from the asynchronous motor 78. A flexible coating sheet 710 is fixedly installed on the outer wall of the end of the spray gun 5 away from the asynchronous motor 78. The flexible coating sheet 710 is provided with multiple paint extrusion holes, and the extrusion holes are connected to the material feeding hole 79.

[0031] In this embodiment, the asynchronous motor 71 is started. The output shaft of the asynchronous motor 71 is connected to one of the transmission wheels in the transmission component 72 via a key to transmit torque. The two transmission wheels in the transmission component 72 are respectively installed outside the output shaft of the asynchronous motor 71 and the fixed end of the supporting hydraulic cylinder 73. The two transmission wheels are connected by a transmission belt. When the output shaft of the asynchronous motor 71 rotates, it drives the connected transmission wheel to rotate. Through the friction of the transmission belt, it drives the other transmission wheel to rotate synchronously, thereby driving the fixed end of the supporting hydraulic cylinder 73 to rotate around its axis. The elastic clamp 74 is made of a material with a certain elasticity and friction, which can firmly clamp the steel pipe body 75. As the fixed end of the supporting hydraulic cylinder 73 rotates, the steel pipe body 75 clamped by the elastic clamp 74 also turns. At the same time, the supporting hydraulic cylinder 73 can drive the steel pipe body 75 to move up and down by controlling the extension and retraction of its piston end to adapt to different coating operation requirements. The vertical linear module 76 is started. The electric current inside the vertical linear module 76... The machine operates, driving the lead screw to rotate. The lead screw and the sliding component are connected by threads. The sliding component is installed on the guide rail of the vertical linear module 76 and can slide up and down along the guide rail. Therefore, when the sliding component of the vertical linear module 76 moves up and down, it drives the horizontal linear module 77 to move up and down synchronously. The operator adjusts the stroke of the vertical linear module 76 through the controller so that the height of the horizontal linear module 77 is at the same level as the central axis of the steel pipe body 75, preparing for the accurate entry of the spray gun 5. The horizontal linear module 77 is started. Its working principle is similar to that of the vertical linear module 76. Therefore, as the sliding component inside moves, the asynchronous motor 78 also moves laterally in the horizontal direction. The operator adjusts the moving distance of the horizontal linear module 77 through the controller according to the position of the steel pipe body 75, so that the asynchronous motor 78 drives the spray gun 5 to accurately align with one end opening of the steel pipe body 75. The asynchronous motor 78 is started. When the output shaft of the asynchronous motor 78 rotates, it drives the spray gun 5 to rotate around its axis until it reaches a horizontal state.As the spray gun 5 rotates horizontally, its front feed hole 79 and flexible coating sheet 710 gradually enter the interior of the steel pipe body 75. The feed box 3 contains coating material. The discharge pump starts working under the control of the controller. The discharge pump pressurizes the coating material in the feed box 3 through mechanical power, and delivers it to the spray gun 5 through the feed hose 4. After the coating material enters the spray gun 5, it is output from the feed hole 79 on the spray gun 5. The feed hole 79 is connected to multiple coating extrusion holes on the flexible coating sheet 710. Under pressure, the coating material penetrates into the interior of the flexible coating sheet 710. The flexible coating sheet 710 is made of a soft material with good adsorption and elasticity, which can closely adhere to the inner wall of the steel pipe body 75. When the flexible coating sheet 710 is on the inner wall of the steel pipe body 75... During movement, the coating is evenly applied to the inner wall of the steel pipe body 75 through the coating extrusion orifice, completing the coating work on one end of the inner wall of the steel pipe body 75. After the coating of one end of the inner wall of the steel pipe body 75 is completed, the spray gun 5 reverses and resets laterally. The operator stops the operation of each component of the coating assembly 7, loosens the elastic clamp 74, removes the steel pipe body 75 from the coating device, then turns the steel pipe body 75 around and reinstalls it on the elastic clamp 74. The coating assembly 7 is then restarted, allowing the flexible coating sheet 710 to gradually enter the interior of the steel pipe body 75 again, coating the other end of the inner wall of the steel pipe body 75. This achieves comprehensive coating of the entire inner wall of the steel pipe body 75 and better accommodates steel pipe bodies 75 of greater length and diameter, improving applicability.

[0032] In one embodiment of this utility model, a cleaning component 8 is provided on the frame 2. The cleaning component 8 includes a top hydraulic cylinder 81. The fixed end of the top hydraulic cylinder 81 is fixedly connected to the inner wall of the top of the frame 2. A slider 82 is fixedly installed on the piston end of the bottom of the top hydraulic cylinder 81. The slider 82 is slidably installed inside the frame 2. A dust suction component 83 is fixedly installed on the outer wall of the slider 82. The dust suction component 83 is provided with a filter and a collector to better collect debris and dust. In addition, the bottom of the dust suction component 83 is fixedly connected to the top center of the cross frame 84. An asynchronous servo motor 85 is fixedly installed on the outer wall of the cross frame 84. A dual-channel motor is fixedly installed on the output end of the asynchronous servo motor 85. A threaded rod 86 is rotatably mounted on a crossbeam 84. A threaded block 87 is threaded onto the threaded rod 86. The outer wall of the top of the threaded block 87 slides against the inner wall of the crossbeam 84. A baffle 88 is fixedly mounted on the outer wall of the bottom of the threaded block 87. A suction hose 89 is fixedly mounted between the center of the baffle 88 and the input end of the suction device 83. In addition, there are two sets of threaded blocks 87, baffles 88 and suction hoses 89. Both sets of threaded blocks 87, baffles 88 and suction hoses 89 are mirror images of the vertical center line of the threaded rod 86 at both ends of the threaded rod 86, so as to better suck out debris and dust.

[0033] In this embodiment, before the coating component 7 starts working, the top hydraulic cylinder 81 is activated, which drives the slider 82 to move up and down inside the frame 2. The operator can adjust the stroke of the top hydraulic cylinder 81 according to the actual size of the steel pipe body 75 through the controller to ensure that the suction component 83 is at the optimal suction height. The asynchronous servo motor 85 on the cross frame 84 is started, and its output shaft begins to rotate, thereby driving the bidirectional threaded rod 86 to rotate synchronously. The bidirectional threaded rod 86 has two sections of threads with opposite directions of rotation, which are matched with the internal threads of the two sets of threaded blocks 87 respectively. When the bidirectional threaded rod 86 rotates, due to the transmission effect of the threads, the two sets of threaded blocks 87 will move synchronously in opposite directions along the axial direction of the bidirectional threaded rod 86. As the threaded blocks 87 move, the baffles 88 also move closer to each other. The operator continues to observe until the two baffles 88 are tightly fitted at the openings at both ends of the steel pipe body 75, forming a good sealing state to prevent dust from entering during the suction process. When dust leaks, the vacuum cleaner 83 is activated. The motor inside the vacuum cleaner 83 drives the fan to rotate at high speed, creating a negative pressure environment inside the vacuum cleaner 83. One end of the vacuum hose 89 is tightly connected to the input end of the vacuum cleaner 83, and the other end passes through the through hole reserved in the center of one of the baffles 88, extending into the interior of the steel pipe body 75. Under the action of negative pressure, debris and dust inside the steel pipe body 75 are sucked into the vacuum hose 89 and then into the vacuum cleaner 83. The filter inside the vacuum cleaner 83 uses a high-efficiency filter material, which can effectively intercept and filter out dust particles, preventing them from passing through. The collection part is responsible for collecting the filtered debris and dust. When the collection part is full, it can be disassembled and cleaned to ensure the continuous operation of the vacuum cleaner 83. Through this process, impurities inside the steel pipe body 75 are removed, providing a clean inner wall environment for subsequent coating work and preventing debris and dust from affecting the coating effect. After cleaning, the top hydraulic cylinder 81 is activated in reverse, causing the crossbar 84 to return to its original position.

[0034] All electrical components mentioned in this application are electrically connected to the controller and 220V AC mains power. The controller is a conventional known device that can provide step-by-step control for the feed box 3, spray gun 5, asynchronous motor 71, support hydraulic cylinder 73, vertical linear module 76, horizontal linear module 77, asynchronous motor 78, top hydraulic cylinder 81, dust collection component 83, and asynchronous servo motor 85. All standard parts used in this application can be purchased from the market. The specific connection methods of each part are all conventional methods such as riveting and welding that are mature in the prior art. The machinery, parts, and equipment are all conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, and will not be described in detail here.

[0035] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A steel pipe inner wall plastic coating device, comprising a base plate (1), a frame (2) fixedly installed at the top center of the base plate (1), a feeding box (3) fixedly installed at one end of the top of the base plate (1), the output end of the feeding box (3) fixedly connected to one end of a conveying hose (4), the other end of the conveying hose (4) fixedly connected to one end of a spray gun (5), and a bracket (6) fixedly installed on the upper surface of the bottom end of the frame (2), characterized in that: The top of the base plate (1) is provided with a plastic coating assembly (7), the plastic coating assembly (7) includes: An asynchronous motor (71) is fixedly installed at the other end of the top of the base plate (1). The output shaft of the asynchronous motor (71) is fixedly installed inside one end of the transmission component (72). The fixed end of the support hydraulic cylinder (73) is rotatably installed inside the bracket (6). The other end of the transmission component (72) is fixedly connected to the outer wall of the fixed end of the support hydraulic cylinder (73). An elastic clamping plate (74) is fixedly installed at the piston end of the top of the support hydraulic cylinder (73). A steel pipe body (75) is clamped inside the elastic clamping plate (74). A vertical linear module (76) is fixedly installed on the upper surface of the bottom end of the bracket (6). A horizontal linear module (77) is fixedly installed on the outer wall of the sliding part on the vertical linear module (76). An asynchronous motor (78) is fixedly installed on the outer wall of the sliding part on the horizontal linear module (77). The output end of the asynchronous motor (78) is fixedly connected to the arc-shaped outer wall of the spray gun (5). The spray gun (5) has a through-hole (79) on the arc-shaped sidewall of the end away from the asynchronous motor (78), and a flexible coating sheet (710) is fixedly installed on the outer wall of the end away from the asynchronous motor (78). The flexible coating sheet (710) has multiple paint extrusion holes, and the extrusion holes are connected to the feed hole (79).

2. The apparatus for coating the inner wall of a steel pipe according to claim 1, wherein: The feeding box (3) contains plastic coating material, and the feeding box (3) is equipped with an inlet and a discharge pump, while the conveying hose (4) is connected to the discharge pump.

3. The apparatus for coating the inner wall of a steel pipe according to claim 1, wherein: The transmission component (72) includes two transmission wheels and a transmission belt, and the two transmission wheels are respectively fixedly connected to the output shaft of the asynchronous motor (71) and the fixed end of the supporting hydraulic cylinder (73).

4. The apparatus for coating the inner wall of a steel pipe according to claim 1, wherein: A cleaning assembly (8) is provided on the frame (2). The cleaning assembly (8) includes a top hydraulic cylinder (81). The top inner wall of the frame (2) is fixedly connected to the fixed end of the top hydraulic cylinder (81). A slider (82) is fixedly installed on the piston end of the bottom of the top hydraulic cylinder (81). The slider (82) is slidably installed inside the frame (2). A dust suction component (83) is fixedly installed on the outer wall of the slider (82). A filter and a collection component are provided inside the dust suction component (83).

5. The apparatus for coating the inner wall of a steel pipe according to claim 4, wherein: The bottom of the vacuum cleaner (83) is fixedly connected to the top center of the cross frame (84). An asynchronous servo motor (85) is fixedly installed on the outer wall of the cross frame (84). A bidirectional threaded rod (86) is fixedly installed at the output end of the asynchronous servo motor (85). The bidirectional threaded rod (86) is rotatably installed on the cross frame (84). A threaded block (87) is threaded on the bidirectional threaded rod (86). The top outer wall of the threaded block (87) slides against the inner wall of the cross frame (84). A baffle (88) is fixedly installed on the bottom outer wall of the threaded block (87). A vacuum hose (89) is fixedly installed between the center of the baffle (88) and the input end of the vacuum cleaner (83).

6. A device for coating the inner wall of a steel pipe according to claim 5, characterized in that: The threaded blocks (87), baffles (88) and dust collection hoses (89) are provided with two groups, and the two groups of threaded blocks (87), baffles (88) and dust collection hoses (89) are mirror images arranged on both ends of the vertical center line of the bidirectional threaded rod (86).

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