Steel pipe outer wall spraying system using cutting fraction protection piece

Abstract

The utility model relates to a steel pipe outer wall spraying system using a cutting fraction protection piece, which comprises a movable support, a bearing part, the cutting fraction protection piece, a probe arm, a spray gun, a flow guide device, a guide rail and more than one steel pipe, the steel pipe is coaxially arranged, the bearing part comprises carrier rollers for bearing the steel pipe and is arranged at the end part of the steel pipe in pairs, and the cutting fraction protection piece is erected in the steel pipe. The cutting fraction protection piece comprises an arc-shaped table, a supporting frame, a blocking plate and a traction lever, the blocking plate is fixed to the arc-shaped table through the supporting frame, the arc-shaped table is positioned in the steel pipe through the traction lever and slides in the circumferential direction of the inner wall of the steel pipe, the movable support is arranged on the guide rail and moves along the axis of the steel pipe, and the probe arm is arranged on the movable support in the direction perpendicular to the guide rail. By means of the spraying device, space is saved, operation is easy, film forming and drying are accelerated after paint is sprayed out, sagging is avoided, and material waste caused by paint splashing is reduced; and meanwhile, steel pipes with different specifications and pipe diameters can be adapted.

Description

Technical Field

[0001] This utility model relates to the field of steel pipe processing, and in particular to a steel pipe outer wall spraying system using cutting and polishing protective components. Background Technology

[0002] In the steel pipe processing flow, the steel pipe is first cut and then transported to the next work unit for subsequent processing. At the same time, in order to improve the corrosion resistance and service life of the steel pipe, its outer wall usually needs to be sprayed to form a layer of anti-corrosion protective coating. However, when cutting the steel pipe, a large amount of cutting debris is easily adhered to the inner wall of the steel pipe, which needs to be cleaned to ensure the quality of subsequent processing. This prolongs the production and processing time. In addition, the exposed part of the steel pipe after cutting will be quickly subjected to air oxidation and corrosion. If protective spraying is not carried out in time, the strength performance of the steel pipe will be reduced after long-term exposure. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model discloses a steel pipe outer wall spraying system using a cutting guard. It includes a movable support, a load-bearing part, a cutting guard, a probe arm, a spray gun, a flow guiding device, a guide rail, and steel pipes. The number of steel pipes is greater than one and they are coaxially arranged. The load-bearing part includes rollers that support the steel pipes and are arranged in pairs at the ends of the steel pipes. The cutting guard is installed inside the steel pipe and includes an arc-shaped platform, a support frame, a blocking plate, and a traction bar. The blocking plate is fixed to the arc-shaped platform by the support frame. The arc-shaped platform is positioned inside the steel pipe by the traction bar and slides circumferentially along the inner wall of the steel pipe, forming a clamping and limiting mechanism for the steel pipe wall together with the rollers. The movable support is set on the guide rail and moves along the axis of the steel pipe. The probe arm is set on the movable support perpendicular to the direction of the guide rail. A spray gun is set at the end of the probe arm. The flow guiding device includes a flow guide shroud and a fan. The flow guide shroud surrounds the spray gun, and the fan is set outside the flow guide shroud and guides air to the outer edge of the flow guide shroud.

[0004] Specifically, the bottom of the curved platform is equipped with rollers, and the shape of the bottom of the curved platform is adapted to the curvature of the inner wall of the steel pipe.

[0005] Specifically, the air guiding device also includes an air hood, which is outside the air guiding hood and connected to it. An air guiding channel is formed between the air hood and the air guiding hood, and an air outlet is opened around the spray gun. The air outlet of the fan is connected to the air guiding channel and sends air to the air outlet through the air guiding channel.

[0006] Specifically, the air outlet direction is parallel to the spray gun spraying direction, and the inner wall of the air hood gradually narrows from the air guide channel to the air outlet direction.

[0007] Specifically, the mobile support includes a railcar, a probe arm seat, and an adjusting bracket. The probe arm seat and the adjusting bracket are mounted on the railcar. The adjusting bracket is equipped with an adjusting rod. The probe arm is hinged to the probe arm seat and connected to the adjusting bracket through the adjusting rod to form a support structure in which the angle between the probe arm and the guide rail is adjustable.

[0008] Specifically, there are two adjustment brackets, which are symmetrically arranged on both sides of the probe arm base.

[0009] Specifically, the probe arm includes a front probe arm and a rear probe arm. The rear probe arm is connected to the probe arm base and the adjusting bracket. The front probe arm is fixedly connected to the rear probe arm and extends towards the load-bearing part. The spray gun is coaxially arranged with the front probe arm.

[0010] Specifically, the flow guiding device is connected to the front extension arm through a shock-absorbing bracket. The shock-absorbing bracket is sleeved on the front extension arm and has multiple contact surfaces on the front extension arm. A buffer pad is provided between the shock-absorbing bracket and the front extension arm.

[0011] Specifically, the support unit also includes a support seat and a drive device. The support seat is provided with a slide groove, and the idler roller is installed on the support seat through the slide groove. The drive device is connected to the idler roller for transmission.

[0012] Specifically, it also includes an airless sprayer, which is mounted on a railcar and connected to a spray gun via a hose.

[0013] Advantages and effects

[0014] This invention reduces the adhesion of the cutting tool to the inner wall of the steel pipe during cutting by using a cutting tool protective device, thereby improving processing efficiency. Simultaneously, setting the cutting and spraying operations on the same processing line reduces prolonged exposure of the cut area, thus minimizing its mechanical strength. The movable support and bearing rollers rotate the steel pipe for spraying, allowing for continuous spraying of multiple pipes, saving space while the cutting tool protective device prevents paint from splashing onto the inner wall of the steel pipe. A flow guide device controls the spraying range, reducing paint splashing and material waste. Furthermore, airflow from outside the flow guide accelerates film formation and drying after spraying, preventing drips. The movable frame and probe arm enhance spraying stability and are adjustable to accommodate steel pipes of different specifications. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the cutting and honing protective component of this utility model;

[0016] Figure 2 This is a schematic diagram of the structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the flow guiding device of this utility model.

[0018] Legend: 1. Movable support; 11. Railcar; 12. Probe arm seat; 13. Adjustable support; 131. Adjusting rod; 2. Bearing unit; 21. Idler roller; 22. Bearing seat; 23. Drive unit; 3. Cutting guard; 31. Arc-shaped platform; 32. Support frame; 33. Blocking plate; 34. Traction bar; 4. Probe arm; 41. Front probe arm; 42. Rear probe arm; 5. Spray gun; 6. Flow guiding device; 61. Flow guide hood; 62. Air duct; 63. Air outlet; 64. Fan; 7. Vibration damping support; 8. Airless sprayer; 9. Guide rail; 10. Steel pipe. Detailed Implementation

[0019] The present invention will be further described below with reference to embodiments, but is not limited to the contents of the specification.

[0020] Unless otherwise expressly defined, the use of terms such as "first," "second," or "third" in the claims, description, and drawings of this utility model is for distinguishing different objects and not for describing a specific order.

[0021] Unless otherwise expressly defined, in the claims, description, and accompanying drawings of this utility model, the use of directional terms such as "center," "lateral," "longitudinal," "horizontal," "vertical," "top," "bottom," "inner," "outer," "upper," "lower," "front," "rear," "left," "right," "clockwise," and "counterclockwise" to indicate orientation or positional relationships is based on the orientation and positional relationships shown in the accompanying drawings and is only for the convenience of describing this utility model and simplifying the description. It does 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, and therefore should not be construed as limiting the specific protection scope of this utility model.

[0022] Unless otherwise expressly defined, the terms "fixed connection" or "fixed connection" used in the claims, description and drawings of this utility model shall be interpreted broadly to refer to any connection in which there is no displacement or relative rotation relationship between the two parties, including non-removable fixed connection, detachable fixed connection, integral connection and fixed connection through other devices or components.

[0023] In the claims, description and accompanying drawings of this utility model, the terms "comprising", "having", and variations thereof are used to mean "including but not limited to".

[0024] like Figures 1-3As shown, this utility model relates to a spraying device for the outer wall of a large-diameter pipe. It includes a movable support 1, a bearing 2, a cutting guard 3, a probe arm 4, a spray gun 5, a flow guiding device 6, a guide rail 9, and steel pipes 10. The number of steel pipes 10 is greater than one and they are coaxially arranged. The bearing 2 includes rollers 21 that support the steel pipes 10 and are arranged in pairs at the ends of the steel pipes 10. The cutting guard 3 is disposed inside the steel pipes 10 and passes through the gap between two steel pipes 10. The cutting guard 3 includes an arc-shaped platform 31, a support frame 32, a blocking plate 33, and a traction bar 34. The blocking plate 33 is fixed to the arc-shaped platform 31 by the support frame 32. The arc-shaped platform 31 is positioned inside the steel pipe 10 by the traction bar 34 and slides circumferentially along the inner wall of the steel pipe 10, interacting with the rollers 21. Together, they form a clamping and limiting mechanism for the wall of the steel pipe 10. First, the cutting guard 3 is set at the cutting position of the steel pipe. By using a plasma cutting gun or cutting machine, a plasma stream is sprayed to cut the steel pipe. The cutting guard 3 set inside the steel pipe 10 can block the cutting debris generated during the cutting process, preventing it from splashing onto the inner wall of the steel pipe 10 and affecting subsequent processing. For the subsequent spraying work, the steel pipe is cut into two pieces at the cutting position. The cutting guard 3 is set between two adjacent steel pipes 10. The moving bracket 1 and the spray gun 5 can directly cross the gap in the middle for continuous spraying. When passing the cutting position, due to the obstruction plate 33, the paint enters through the gap and is blocked, thus preventing the paint from being sprayed onto the inner wall of the steel pipe 10.

[0025] The movable support 1 is set on the guide rail 9 and moves along the axis of the steel pipe 10. The probe arm 4 is set on the movable support 1 perpendicular to the guide rail 9. The end of the probe arm 4 is equipped with a spray gun 5, which is connected to the anti-corrosion coating. After the spray gun 5 is started, the movable support 1 is driven to move along the guide rail 9, which can drive the spray gun 5 to move parallel to the axis of the steel pipe 10 for spraying. At the same time, the roller 21 carries the steel pipe 10 and rotates the steel pipe 10, and then cooperates with the spray gun 5 to spray the entire steel pipe 10. The protective coating can also be sprayed independently at the cutting position. Since the cutting guard 3 is set at the cutting position, the coating that is not sprayed on the steel pipe but enters the interior of the steel pipe 10 from the discontinuity will also be blocked by the cutting guard 3, so as to avoid spraying onto the inner wall of the steel pipe and affecting subsequent processing. The movable support 1 can directly cross the discontinuity and move to the other end of the steel pipe.

[0026] During operation, as the spray gun 5 sprays paint onto the steel pipe 10, the steel pipe 10 rotates. Before the paint is fully dried and adhered, it is subjected to gravity and the rolling action of the pipe, causing flow and uneven paint application. Reducing the spray volume to avoid sagging would prevent a single spray from forming a complete film, requiring multiple coats and reducing spraying efficiency. Therefore, a flow guiding device 6 is installed outside the spray gun 5. The flow guiding device 6 includes a flow guide shroud 61 and a fan 64. The flow guide shroud 61 surrounds the spray gun 5, and the fan 64 is located outside the flow guide shroud 61 and guides airflow along its outer edge. Because high-pressure atomization is used during spraying... The coating on the outer edge is most disturbed by the nozzle and the surrounding air, and the coating often splashes on the outside of the spraying area. The deflector 61 can limit the range of the coating outside the nozzle and guide the spray gun, while collecting the dispersed coating. A fan is then used to blow air around the outer edge of the deflector 61, using a weak airflow with a speed lower than the spraying speed to dry the coating. This allows the coating to form a film quickly after adhering to the pipe wall, reducing sagging. At the same time, the airflow outside the deflector 61 causes the splashed coating collected on the inner wall of the deflector 61 to continue to adhere to the pipe wall with the airflow pressure, reducing coating waste.

[0027] like Figure 2 As shown, furthermore, the bottom of the arc-shaped platform 31 is equipped with rollers made of rubber to avoid scratching the inner wall of the steel pipe 10. The shape of the bottom of the arc-shaped platform 31 is adapted to the curvature of the inner wall of the steel pipe 10. The traction bar 34 adopts a movable and adjustable structure to adjust the position between the arc-shaped platform 31 and the steel pipe 10. At the same time, adjusting the traction bar 34 clamps the rollers to the steel pipe 10, forming a stable structure with the rollers 21 clamping and limiting the steel pipe 10 inside and outside. Since the steel pipe 10 is prone to vibration during the rotation of the rollers 21, displacement and asynchrony are likely to occur between multiple steel pipes after long-term operation. Therefore, the traction bar 34 makes the arc-shaped platform 31 press against the inner wall of the steel pipe, reducing the vibration of the steel pipe 10 and preventing asynchrony after long-term operation, which would cause inconsistent coating thickness and uneven coverage of all steel pipe surfaces, affecting the coating quality. Figure 2 As shown, the air guiding device 6 also includes an air hood 62, which is outside and connected to the air guiding hood 61. An air guiding channel is formed between the air hood 62 and the air guiding hood 61, and an air outlet duct 63 is opened around the spray gun 5. The air outlet of the fan 64 is connected to the air guiding channel and sends air to the air outlet duct 63 through the air guiding channel. An inner cavity with a streamlined shape is formed between the air guiding hood 61 and the air hood 62, which reduces the loss of kinetic energy of the airflow in the cavity. At the same time, the fan 64 is set inside the air hood 62 to send air into the air guiding channel. The airflow in the air guiding channel flows around the inner cavity and finally flows out from the air outlet duct 63.

[0028] like Figure 3As shown, the air outlet 63 is parallel to the spraying direction of the spray gun 5, which can limit the spraying range of the paint, reduce paint waste, and reduce paint splashing onto the pipe. The inner wall of the air guide hood 62 gradually narrows from the air guide channel to the air outlet 63, which accelerates the sprayed airflow. At the same time, because the airflow in the center of the spraying area is accelerated after blowing, the surrounding air is driven by the Bernoulli effect, thereby increasing the blowing volume. Therefore, a small-power fan can achieve a large air volume and wind speed, which enables the paint to dry quickly and further reduces the impact of equipment vibration on the spraying device. Preferably, a heating device is installed in the air guide device 6 to heat the blown airflow, which accelerates the evaporation of solvent in the paint and improves the curing and film-forming speed of the paint.

[0029] like Figure 2 As shown, the movable support 1 includes a railcar 11, a probe arm seat 12, and an adjusting support 13. The probe arm seat 12 and the adjusting support 13 are mounted on the railcar 11. The railcar 11 moves along the guide rail 9 closer to or away from the pipe body. The adjusting support 13 is equipped with an adjusting rod 131. The probe arm 4 is hinged to the probe arm seat 12 and connected to the adjusting support 13 via the adjusting rod 131 to form a support structure with an adjustable angle between the probe arm 4 and the railcar 11. The probe arm seat 12 is connected to the end of the probe arm 4 away from the spray gun 5 to stabilize the probe arm. The adjusting support 13 is connected to the probe arm 4 at the middle position to form multi-point support, so as to reduce the problem of equipment vibration and probe arm swaying caused by spray reaction force during the spraying process. The adjusting rod 131 is movably mounted on the adjusting support 13. The height of the probe arm seat 12 and the adjusting support 13 can be adjusted simultaneously by raising and lowering the adjusting rod 131, thereby further adjusting the height and angle of the probe arm 4 to adapt to steel pipes 10 with different diameters.

[0030] There are two adjusting brackets 13, which are symmetrically arranged on both sides of the probe arm seat 12. When multiple steel pipes 10 need to be sprayed, since the pipes are heavy and difficult to move, multiple pipes can be sprayed on the same production line. When it is necessary to replace the steel pipe 10 for spraying, it is only necessary to release the fixing of the adjusting rod 131 and the probe arm 4, rotate the probe arm 4 180° along the probe arm seat 12 and connect it with the adjusting bracket 13 on the other side, so that the spraying operation of another steel pipe 10 can be carried out, further improving production efficiency.

[0031] The probe arm 4 includes a front probe arm 41 and a rear probe arm 42. The rear probe arm 42 is connected to the probe arm base 12 and the adjusting bracket 13 to stabilize the probe arm 4 as a whole. The front probe arm 41 is fixedly connected to the rear probe arm 42 and extends towards the bearing part 2. The spray gun 5 is coaxially arranged with the front probe arm 41. The front probe arm 41 and the rear probe arm 42 can be connected by a telescopic structure. The spraying distance is adjusted by adjusting the length of the probe arm 4. At the same time, the spray gun 5 adopts a spraying method perpendicular to the surface of the pipe. The angle between the spray gun 5 and the railcar 11 is 0°-6°. The distance between the spray gun 5 and the outer wall of the steel pipe 10 is 300-400mm to ensure that the distance between the paint and the pipe is uniform, improve the uniformity of the paint, and transmit the reaction force during spraying to the axis of the probe arm 4, thereby improving the stability during spraying.

[0032] Furthermore, to prevent the spray gun 5 from shaking when the fan 64 on the flow guide device 6 is working, the flow guide device 6 is connected to the front probe arm 41 through a shock-absorbing bracket 7. The shock-absorbing bracket 7 is sleeved on the front probe arm 41 and has multiple contact surfaces on the front probe arm 41. A buffer pad is provided between the shock-absorbing bracket 7 and the front probe arm 41. The multi-point support and the buffer pad reduce the impact of the fan equipment on the spraying when it is working.

[0033] The support unit 2 also includes a support seat 22 and a drive device 23. The support seat 22 is provided with a sliding groove. The idler roller 21 is installed on the support seat 22 through the sliding groove to accommodate steel pipes 10 of different models and diameters. The drive device 23 is connected to the idler roller 21 for transmission. When the spraying work is carried out, the drive device 23 is started in advance to drive the steel pipe 10 to rotate to the predetermined speed, and then the spray gun 5 and the moving bracket are started to carry out the spraying operation.

[0034] It also includes an airless sprayer 8, which is mounted on the railcar 11 and connected to the spray gun 5 via a hose. The airless sprayer 8 further enhances the atomization effect of the paint, making the paint more evenly dispersed. After being blown by the flow guide device 6, it can quickly form a film and dry, further reducing the occurrence of paint flow.

[0035] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the embodiments of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is impossible to exhaustively list all embodiments here. All obvious variations or modifications derived from the technical solutions of this utility model are still within the protection scope of this utility model.

Claims

1. A steel pipe outer wall spraying system using a cutting ring guard, characterized in that, It includes a movable support (1), a load-bearing part (2), a cutting guard (3), a probe arm (4), a spray gun (5), a flow guiding device (6), a guide rail (9), and steel pipes (10). The number of steel pipes (10) is greater than one and they are coaxially arranged. The load-bearing part (2) includes rollers (21) that support the steel pipes (10) and are arranged in pairs at the ends of the steel pipes (10). The cutting guard (3) is set inside the steel pipes (10) and passes through the gap between the two steel pipes (10). The cutting guard (3) includes an arc-shaped platform (31), a support frame (32), a blocking plate (33), and a traction bar (34). The blocking plate (33) is fixed to the arc-shaped platform (31) by the support frame (32). On the upper part, the arc-shaped platform (31) is positioned inside the steel pipe (10) by the traction bar (34) and slides circumferentially along the inner wall of the steel pipe (10) together with the roller (21) to form a clamping and limiting mechanism for the steel pipe (10) wall. The movable support (1) is set on the guide rail (9) and moves along the axis of the steel pipe (10). The probe arm (4) is set on the movable support (1) perpendicular to the direction of the guide rail (9). The probe arm (4) is equipped with a spray gun (5) at the end. The flow guiding device (6) includes a flow guide shroud (61) and a fan (64). The flow guide shroud (61) surrounds the spray gun (5). The fan (64) is set outside the flow guide shroud (61) and guides air to the outer edge of the flow guide shroud (61).

2. The steel pipe outer wall spraying system according to claim 1, characterized by, The bottom of the arc-shaped platform (31) is equipped with rollers, and the shape of the bottom of the arc-shaped platform (31) is adapted to the curvature of the inner wall of the steel pipe (10).

3. The steel pipe outer wall spraying system according to claim 1, characterized by, The flow guiding device (6) also includes an air hood (62), which is outside the flow guiding hood (61) and connected to the flow guiding hood (61). An air guiding channel is formed between the air hood (62) and the flow guiding hood (61), and an air outlet duct (63) is opened around the spray gun (5). The air outlet of the fan (64) is connected to the air guiding channel and sends air to the air outlet duct (63) through the air guiding channel.

4. The steel pipe outer wall spraying system according to claim 3, characterized by, The air outlet (63) has an air outlet direction parallel to the spraying direction of the spray gun (5), and the inner wall of the air guide hood (62) gradually narrows from the air guide channel to the air outlet (63).

5. The steel pipe outer wall spraying system according to claim 3, wherein The movable support (1) includes a railcar (11), a probe arm seat (12), and an adjusting support (13). The probe arm seat (12) and the adjusting support (13) are mounted on the railcar (11). The adjusting support (13) is provided with an adjusting rod (131). The probe arm (4) is hinged to the probe arm seat (12) and connected to the adjusting support (13) through the adjusting rod (131) to form a support structure in which the angle between the probe arm (4) and the railcar (11) is adjustable.

6. The steel pipe outer wall spraying system according to claim 5, wherein The number of the adjustment brackets (13) is 2, and the adjustment brackets (13) are symmetrically arranged on both sides of the probe arm seat (12).

7. The steel pipe outer wall spraying system according to claim 5, wherein The probe arm (4) includes a front probe arm (41) and a rear probe arm (42). The rear probe arm (42) is connected to the probe arm seat (12) and the adjusting bracket (13). The front probe arm (41) is fixedly connected to the rear probe arm (42) and extends towards the bearing part (2). The spray gun (5) is coaxially arranged with the front probe arm (41).

8. The steel pipe outer wall spraying system according to claim 7, characterized by, The flow guiding device (6) is connected to the front probe arm (41) through the shock-absorbing bracket (7). The shock-absorbing bracket (7) is sleeved on the front probe arm (41) and has multiple contact surfaces on the front probe arm (41). A buffer pad is provided between the shock-absorbing bracket (7) and the front probe arm (41).

9. The steel pipe exterior wall spraying system according to claim 1, wherein The support part (2) further includes a support seat (22) and a drive device (23). The support seat (22) is provided with a sliding groove, and the idler roller (21) is installed on the support seat (22) through the sliding groove. The drive device (23) is connected to the idler roller (21) in a transmission connection.

10. The steel pipe outer wall spraying system according to claim 5, characterized by, It also includes an airless sprayer (8), which is mounted on a railcar (11) and connected to a spray gun (5) via a hose.

Images