Rail type pipeline spraying device

Abstract

The utility model relates to the technical field of spraying devices, in particular to a rail type pipeline spraying device which can be applied to spraying operation of the inner wall face or the outer wall face of a steel pipe, and before spraying, a disc type rail of a rail mechanism is arranged on the inner side or the outer side of the steel pipe and moved to a pipeline wall face pre-spraying position through moving equipment; then the wall face of the steel pipe is heated through the heating mechanism, after the wall face of the steel pipe is heated, the spraying mechanism can be driven to move to the heated position of the heated steel pipe along with continuous advancing of the walking mechanism along the disc type track, and epoxy powder is sprayed to the wall face of the heated steel pipe through the spraying mechanism; the heating mechanism and the spraying mechanism are both of a detachable structure, rapid disassembly and assembly can be achieved, and the construction efficiency can be improved conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of spraying devices, in particular to a track-type pipeline spraying device. Background Art

[0002] After the steel pipe is produced, the wall of the steel pipe is usually treated with anti-corrosion. However, a certain area near the pipe mouth will be left without anti-corrosion treatment. The advantages of this treatment are: when the steel pipe is transported to the construction site, the steel pipe needs to be welded together, and a certain area will be left without anti-corrosion. During welding, heat will not be transferred to the anti-corrosion area, so the existing anti-corrosion coating will not be damaged.

[0003] After the steel pipes are welded, the portion near the pipe ends still needs to be treated for corrosion. The current method for treating this upper area is to spray anti-corrosion paint on the upper portion after welding two steel pipes together. However, the paint takes a long time to cure, and when the shield machine pushes the welded and anti-corrosion-treated steel pipes into the tunnel, the paint on the outer wall of the steel pipes is scraped off by the tunnel wall, resulting in poor corrosion resistance in the portion near the pipe ends.

[0004] Typically, devices that crawl along the outer wall of a pipe and spray an anti-corrosion coating are used. For example, a crawling spraying device disclosed in Chinese Patent Publication No. CN221245661U comprises a spray gun, a high-frequency heater, an induction coil electrically connected to the high-frequency heater, a crawler, and a controller. By attaching the spray gun and induction coil to a crawler that crawls circumferentially along the surface of a large-diameter steel pipe, the crawling spraying device can be used to spray epoxy powder onto the outer wall of the pipe when the pipes are welded together and the outer wall near the pipe opening requires anti-corrosion treatment.

[0005] In the prior art, spraying is performed in a crawling manner, and the crawler is prone to shaking during the crawling process, resulting in uneven spraying.

[0006] Therefore, the existing technology still needs to be improved and developed. Utility Model Content

[0007] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a track-type pipeline spraying device to solve the problem of poor spraying effect of the crawling-type spraying device in the prior art.

[0008] A track-type pipeline spraying device, comprising:

[0009] The track mechanism includes a disc track that can be fixed on the inside or outside of the pipe weld position;

[0010] A walking mechanism, running on the disc track;

[0011] A heating mechanism is detachably fixed to the output end of the traveling mechanism, and the heating distance of the heating mechanism on the inner wall or outer wall of the pipeline is adjustable;

[0012] The spraying mechanism is detachably fixed to the output end of the traveling mechanism and is located behind the moving direction of the heating mechanism. The spraying distance of the spraying mechanism on the inner wall or outer wall of the pipeline is adjustable.

[0013] Specifically, the walking mechanism includes a mounting plate, a driving device fixed to the mounting plate, a gear connected to the output end of the driving device, and a toothed chain fixed in a ring shape to the outside of the disc track and meshing with the gear. The mounting plate is the output end of the walking mechanism.

[0014] Specifically, the walking mechanism further includes a pulley frame fixed to the mounting plate, and a pulley rotatably provided on the pulley frame, and the pulley slides along the disc track.

[0015] Specifically, the mounting plate is fixed with an equipment box, and the equipment box is equipped with an intermediate frequency device, a walking control system and a spraying control system. The intermediate frequency device is used to control the heating frequency of the heating mechanism, the walking control system is used to control the stroke of the walking mechanism, and the spraying control system is used to control the spraying work of the spraying mechanism.

[0016] Specifically, the track-type pipeline spraying device further includes a first distance maintaining mechanism fixed to the output end of the traveling mechanism, and the first distance maintaining mechanism is used to maintain the heating distance of the heating mechanism on the pipeline.

[0017] Specifically, the heating mechanism is a medium frequency heating device, which includes a first induction coil connected to the output end of the first distance maintaining mechanism. The first induction coil can pass a medium frequency current to generate an alternating magnetic field, so that an induced current of the same frequency is generated in the pipeline, thereby heating the inner wall or outer wall of the pipeline.

[0018] Specifically, the spraying mechanism includes a guide rail fixed to the output end of the walking mechanism, at least one spray gun sliding on the guide rail along the axial direction of the pipeline, and a translation drive device for driving the spray gun to reciprocate along the axial direction of the pipeline. The translation drive device is also used to control the speed and reciprocating stroke range of the spray gun along the axial direction of the pipeline, and the nozzle of the spray gun is facing the inner wall or outer wall of the pipeline.

[0019] Specifically, the track-type pipeline spraying device further includes a temperature compensation mechanism, and the spraying mechanism is located between the heating mechanism and the temperature compensation mechanism.

[0020] Specifically, the temperature compensation mechanism includes a temperature compensation component fixed to the output end of the walking mechanism and having a second distance maintaining mechanism, and the temperature compensation component is a second induction coil or an infrared heating device.

[0021] Specifically, the second induction coil can be fed with a medium-frequency current to generate an alternating magnetic field, so that an induced current of the same frequency is generated in the pipeline to compensate for the temperature of the sprayed pipeline.

[0022] Beneficial effects of the utility model:

[0023] The track-type pipeline spraying device of the present invention can be applied to the spraying operation of the inner wall or outer wall of the steel pipe. Before spraying, the disc track of the track mechanism is set on the inner side or outer side of the steel pipe and moved to the pre-spraying position of the pipe wall through the mobile device, and then the wall of the steel pipe is heated by the heating mechanism. When the wall of the steel pipe is heated, as the walking mechanism continues to move along the disc track, it can drive the spraying mechanism to move to the heated position of the heated steel pipe, and the spraying mechanism is used to spray epoxy powder on the wall of the heated steel pipe. The disc track design has better stability and can ensure the uniformity of the epoxy powder spraying; the heating mechanism and the spraying mechanism both adopt a detachable structure, which can be quickly disassembled and assembled, thereby improving construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a three-dimensional diagram of the track-type pipeline spraying device of Example 1 spraying the outer wall of the pipeline;

[0025] Figure 2 The three-dimensional track type pipeline spraying device of embodiment 1 Figure 1 ;

[0026] Figure 3 The three-dimensional track type pipeline spraying device of Example 1 Figure 2 ;

[0027] Figure 4 for Figure 3 Enlarged view of part A;

[0028] Figure 5 A perspective view of the track mechanism and the travel mechanism of Example 1;

[0029] Figure 6 A perspective view of the heating mechanism, spraying mechanism, and equipment box of Example 1;

[0030] Figure 7 A top view of the heating mechanism and the spraying mechanism of Example 1;

[0031] Figure 8 This is a three-dimensional diagram of the track-type pipeline spraying device of Example 2 spraying the inner wall of the pipeline;

[0032] Figure 9 1 is a top view of the heating mechanism and the spraying mechanism of Example 3, which has a plurality of second spray guns;

[0033] Figure 10 This is a top view of the heating mechanism, spraying mechanism and temperature compensation mechanism of Example 4.

[0034] The figures are marked as: track mechanism 10, disc track 11, walking mechanism 20, heating mechanism 30, spraying mechanism 40, mounting plate 21, driving device 22, gear 23, tooth chain 24, pulley frame 25, pulley 26, bracket 28, equipment box 50, first distance maintaining mechanism 31, first induction coil 32, guide rail 41, spray gun 42, translation driving device 43, temperature compensation mechanism 60, second induction coil 61, second distance maintaining mechanism 62, pipeline 70. DETAILED DESCRIPTION

[0035] The present invention provides a track-type pipe spraying device. To make the purpose, technical solution, and effects of the present invention more clear and explicit, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific examples described herein are only intended to explain the present invention and are not intended to limit the present invention.

[0036] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0037] Example 1

[0038] Please refer to Figures 1 to 6 As shown, this embodiment discloses a track-type pipeline spraying device, comprising:

[0039] The track mechanism 10 includes a disc track 11 that can be fixed to the inside or outside of the weld position of the pipe 70;

[0040] The traveling mechanism 20 travels on the disc track 11;

[0041] The heating mechanism 30 is detachably fixed to the output end of the traveling mechanism 20 , and the heating distance of the heating mechanism 30 on the inner wall or outer wall of the pipe 70 is adjustable;

[0042] The spraying mechanism 40 is detachably fixed to the output end of the traveling mechanism 20 and is located behind the moving direction of the heating mechanism 30 . The spraying distance of the spraying mechanism 40 on the inner wall or outer wall of the pipe 70 is adjustable.

[0043] The track-type pipeline spraying device of this embodiment can be applied to the spraying operation of the inner wall or outer wall of the weld position of two steel pipes 70. Taking this embodiment as an example for explanation, this embodiment is aimed at the spraying operation of the outer wall of the weld position of the steel pipe 70. Before spraying, the disc track 11 of the track mechanism 10 is sleeved on the outside of the steel pipe 70 and moved to the pre-spraying position of the outer wall of the pipe 70 through the mobile device, and then the outer wall of the steel pipe 70 is heated by the heating mechanism 30. When the outer wall of the steel pipe 70 is heated, as the walking mechanism 20 continues to move along the disc track 11, it can drive the spraying mechanism 40 to move to the radial outside of the outer wall of the heated steel pipe 70, and use the spraying mechanism 40 to spray epoxy powder on the outer wall of the heated steel pipe 70. Therefore, when two steel pipes 70 are welded together and the portion of the outer wall of the steel pipe 70 near the pipe mouth needs to be treated for corrosion, the track-type pipe spraying device provided in this embodiment can be used to spray epoxy powder onto the outer wall of the steel pipe 70. The walking mechanism 20 drives the heating mechanism 30 and the spraying mechanism 40 to move circumferentially around the pipe 70, thereby achieving the effect of heating first and then spraying, so that the portion of the outer wall of the steel pipe 70 near the pipe mouth can be quickly sprayed with epoxy powder. Since the epoxy powder can solidify quickly after contacting the outer wall of the heated steel pipe 70, and the formed epoxy powder coating can be firmly fixed on the outer wall of the steel pipe 70, when the connection area of the two steel pipes 70 is sprayed, there is no need to wait for a long time. The welded and anti-corrosion steel pipe can be pushed into the tunnel by the shield machine, and the epoxy powder coating on the outer wall of the steel pipe 70 will not be scraped off by the tunnel wall. The part of the outer wall of the steel pipe 70 close to the pipe mouth can maintain excellent anti-corrosion performance. The design of the disc track 11 has better stability and can ensure the uniformity of the epoxy powder spraying.

[0044] In addition, the heating distance of the heating mechanism 30 of this embodiment to the inner wall or outer wall of the pipe 70 is adjustable, and the spraying distance of the spraying mechanism 40 to the inner wall or outer wall of the pipe 70 is adjustable. Through such an arrangement, it can adapt to the spraying processing of pipes 70 with different outer diameters.

[0045] Moreover, the heating mechanism 30 and the spraying mechanism 40 of this embodiment both adopt a detachable structure. Specifically, the heating mechanism 30 and the spraying mechanism 40 can be fixed to the output end of the walking mechanism 20 by bolts, which can be quickly disassembled and assembled, thereby improving construction efficiency.

[0046] Please refer to Figure 3 、 Figure 4 and Figure 5The walking mechanism 20 includes a mounting plate 21, a driving device 22 fixed to the mounting plate 21, a gear 23 connected to the output end of the driving device 22, and a toothed chain 24 fixed in a ring shape to the outside of the disc track 11 and meshing with the gear 23. The mounting plate 21 is the output end of the walking mechanism 20. The driving device 22 can adopt a servo motor with high control accuracy and good stability. During the spraying operation, the gear 23 is driven to rotate by the driving device 22. Since the toothed chain 24 is fixed to the outside of the disc track 11, it can drive the mounting plate 21 to make circumferential motion around the disc track 11, and the structure is ingenious.

[0047] Furthermore, the walking mechanism 20 also includes a pulley frame 25 fixed to the mounting plate 21 and a pulley 26 rotatably arranged on the pulley frame 25. The pulley 26 slides along the disc track 11. By providing the pulley 26, the stability of the mounting plate 21 in the circumferential movement around the disc track 11 is improved.

[0048] Furthermore, the mounting plate 21 is fixed with an equipment box 50, which is equipped with an intermediate frequency device, a walking control system and a spraying control system. The intermediate frequency device is used to control the heating frequency of the heating mechanism 30, the walking control system is used to control the stroke of the walking mechanism 20, and the spraying control system is used to control the spraying operation of the spraying mechanism 40.

[0049] Please refer to Figure 2 and Figure 6 The track-type pipeline spraying device also includes a first distance maintaining mechanism 31 fixed to the output end of the walking mechanism 20. The first distance maintaining mechanism 31 is used to maintain the heating distance of the heating mechanism 30 to the pipeline 70. The first distance maintaining mechanism 31 can adopt an automatic distance maintaining device and an intelligent following device disclosed in Chinese patent announcement No. CN208654642U. Through the linkage of distance detection sensors, motor-controlled lifting and other modules, the heating distance of the heating mechanism 30 to the pipeline 70 can be automatically controlled without manual adjustment.

[0050] Moreover, in this embodiment, the heating mechanism 30 and the spraying mechanism 40 are connected through a bracket 28 to realize synchronous adjustment of the heating mechanism 30 and the spraying mechanism 40, and the heating distance of the heating mechanism 30 and the spraying distance of the spraying mechanism 40 are adjusted through the first distance maintaining mechanism 31, so that they can adapt to the spraying processing of pipes 70 with different outer diameters.

[0051] Please refer to Figure 6The heating mechanism 30 of this embodiment is a medium frequency heating device. The heating mechanism 30 includes a first induction coil 32 connected to the output end of the first distance maintaining mechanism 31. The first induction coil 32 can be fed with a medium frequency current (AC power supply frequency of 300 Hz to 10,000 Hz) to generate an alternating magnetic field. The principle of magnetic field induced eddy current heating is utilized to generate an induced current of the same frequency in the pipe 70. The eddy current effect causes the steel pipe 70 to heat up, thereby achieving the effect of heating the steel pipe 70. The distribution of this induced current in the pipe 70 is uneven. It is strong on the surface of the pipe 70, very weak inside the pipe 70, and close to zero in the core of the pipe 70. By utilizing this skin effect, the surface of the pipe 70 can be rapidly heated. The surface temperature rises to 800-1000°C within a few seconds, while the temperature of the core of the pipe 70 rises very little, thereby preventing the core of the pipe 70 from overheating.

[0052] When the first induction coil 32 is operating, it heats the outer surface of the steel pipe 70, rapidly raising its temperature to a relatively high level. However, the high temperature of the outer surface of the steel pipe 70 can be transferred to the first induction coil 32, causing it to heat up significantly. To address this issue, the first induction coil 32 of this embodiment is internally provided with a water channel (not shown in the drawings). Cooling water circulates through the water channel, dissipating the heat from the first induction coil 32 and preventing significant heating of the first induction coil 32, thereby extending its service life.

[0053] Please refer to Figure 6 and Figure 7 The spraying mechanism 40 includes a guide rail 41 fixed to the output end of the walking mechanism 20, a spray gun 42 sliding axially on the guide rail 41 along the pipeline 70, and a translation drive device 43 for driving the spray gun 42 to reciprocate axially along the pipeline 70. The nozzle of the spray gun 42 is directed toward the inner wall or outer wall of the pipeline 70. The translation drive device 43 is also used to control the speed and reciprocating stroke range of the spray gun 42 axially reciprocating along the pipeline 70 to adapt to different spraying requirements.

[0054] The spraying mechanism 40 of this embodiment adopts a spray gun 42, which can simplify the structure of the spraying part compared with the existing multiple spray gun structure, making the overall structure more compact, and the spray gun 42 is set on the guide rail 41. One end of the spray gun 42 is a nozzle, and the other end is connected to the paint supply equipment through a pipe, and epoxy powder is provided to the spray gun 42 through the paint supply equipment.

[0055] In addition, this embodiment drives the spray gun 42 to reciprocate along the axial direction of the pipe 70 through the translation drive device 43. During the spraying process, the epoxy powder can be evenly coated on the outer wall of the steel pipe 70. The reciprocating spraying method is used, the coating is more uniform, and the spraying width and thickness are easier to control.

[0056] Furthermore, the translation drive device 43 can be used to control the stroke of the spray gun 42 along the axial direction of the pipe 70, thereby controlling the spraying width of the epoxy powder along the axial direction of the pipe 70. The translation drive device 43 of this embodiment adopts a ball screw, which can accurately control the stroke and ensure the consistency of the spraying width.

[0057] Example 2

[0058] Please refer to Figure 8 The track-type pipeline spraying device of this embodiment is aimed at the spraying operation of the inner wall of the steel pipe 70. Before spraying, the disc track 11 of the track mechanism 10 is placed on the inner side of the steel pipe 70 and moved to the pre-spraying position of the inner wall of the pipe 70 by the mobile device, and then the inner wall of the steel pipe 70 is heated by the heating mechanism 30. When the inner wall of the steel pipe 70 is heated, as the traveling mechanism 20 continues to move along the disc track 11, it can drive the spraying mechanism 40 to move to the radial outside of the inner wall of the heated steel pipe 70, and use the spraying mechanism 40 to spray epoxy powder on the inner wall of the heated steel pipe 70.

[0059] The track-type pipeline spraying device of this embodiment is different from that of Example 1 in that the heating direction of the heating mechanism 30 and the spraying direction of the spraying mechanism 40 are both toward the outside of the disc track 11, and the layout of the heating mechanism 30 and the spraying mechanism 40 are adjusted accordingly.

[0060] Example 3

[0061] Please refer to Figure 9 Compared with Example 1, the difference between this embodiment is that the spraying mechanism 40 uses multiple spray guns 42, and the nozzles of the spray guns 42 are directed toward the inner wall or outer wall of the pipe 70. The use of multiple spray guns 42 can expand the spraying range and improve the spraying efficiency.

[0062] Example 4

[0063] Please refer to Figure 10 Compared with Example 1, this embodiment differs in that the track-type pipe spraying device of this embodiment further includes a temperature compensation mechanism 60, and the spraying mechanism 40 is located between the heating mechanism 30 and the temperature compensation mechanism 60. The heating mechanism 30, the spraying mechanism 40, and the temperature compensation mechanism 60 are arranged in sequence along the travel direction of the travel mechanism 20. During the specific spraying operation, the heating mechanism 30 can be used to preheat the unpowder-sprayed area of the steel pipe 70, while the temperature compensation mechanism 60 can be used to keep the area of the steel pipe sprayed with epoxy powder insulated, thereby ensuring that the epoxy powder is fully cured and the formed epoxy powder coating can be firmly fixed on the wall of the steel pipe.

[0064] Furthermore, the temperature compensation mechanism 60 includes a temperature compensation component fixed to the output end of the travel mechanism 20 and having a second distance maintaining mechanism 62. In this embodiment, the temperature compensation component is a second induction coil. Of course, in other embodiments, the temperature compensation component can also be an infrared heating device and is not limited to the second induction coil. In this embodiment, the second induction coil 61 can be fed with a medium-frequency current (AC power supply frequency of 300 Hz to 10,000 Hz) to generate an alternating magnetic field. Utilizing the principle of magnetic field-induced eddy current heating, an induced current of the same frequency is generated in the pipe 70. The eddy current effect causes the steel pipe 70 to heat, thereby compensating the temperature of the sprayed pipe 70.

[0065] The above specifically describes the preferred embodiments of the present invention, but the present invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of the present invention.

Claims

1. A track-type pipeline spraying device, characterized in that: include: A track mechanism (10) includes a disc track (11) that can be fixed to the inside or outside of the weld position of the pipeline (70); A walking mechanism (20) that travels on the disc track (11); A heating mechanism (30) is detachably fixed to the output end of the traveling mechanism (20), and the heating distance of the heating mechanism (30) on the inner wall or outer wall of the pipe (70) is adjustable; The spraying mechanism (40) is detachably fixed to the output end of the traveling mechanism (20) and is located behind the moving direction of the heating mechanism (30). The spraying distance of the spraying mechanism (40) on the inner wall or outer wall of the pipe (70) is adjustable.

2. A track-type pipeline spraying device according to claim 1, characterized in that: The traveling mechanism (20) comprises a mounting plate (21), a driving device (22) fixed to the mounting plate (21), a gear (23) connected to the output end of the driving device (22), and a toothed chain (24) fixed in an annular shape to the outside of the disc track (11) and meshing with the gear (23). The mounting plate (21) serves as the output end of the traveling mechanism (20).

3. The track-type pipeline spraying device according to claim 2, characterized in that: The walking mechanism (20) further comprises a pulley frame (25) fixed to the mounting plate (21), and a pulley (26) rotatably arranged on the pulley frame (25), wherein the pulley (26) slides along the disc track (11).

4. The track-type pipeline spraying device according to claim 2, characterized in that: The mounting plate (21) is fixed with an equipment box (50), and the equipment box (50) is provided with an intermediate frequency device, a travel control system and a spray control system. The intermediate frequency device is used to control the heating frequency of the heating mechanism (30), the travel control system is used to control the stroke of the travel mechanism (20), and the spray control system is used to control the spraying operation of the spray mechanism (40).

5. The track-type pipeline spraying device according to claim 4, characterized in that: The track-type pipeline spraying device further comprises a first distance maintaining mechanism (31) fixed to the output end of the walking mechanism (20), wherein the first distance maintaining mechanism (31) is used to maintain the heating distance of the heating mechanism (30) to the pipeline (70).

6. The track-type pipeline spraying device according to claim 5, characterized in that: The heating mechanism (30) is a medium frequency heating device, comprising a first induction coil (32) connected to the output end of the first distance maintaining mechanism (31). The first induction coil (32) can be fed with a medium frequency current to generate an alternating magnetic field, so that an induced current of the same frequency is generated in the pipeline (70), thereby heating the inner wall surface or the outer wall surface of the pipeline (70).

7. The track-type pipeline spraying device according to claim 1, characterized in that: The spraying mechanism (40) comprises a guide rail (41) fixed to the output end of the walking mechanism (20), at least one spray gun (42) sliding on the guide rail (41) along the axial direction of the pipeline (70), and a translation drive device (43) for driving the spray gun (42) to reciprocate axially along the pipeline (70). The translation drive device (43) is also used to control the speed and reciprocating stroke range of the spray gun (42) in the axial reciprocating motion along the pipeline (70). The nozzle of the spray gun (42) faces the inner wall surface or the outer wall surface of the pipeline (70).

8. The track-type pipeline spraying device according to claim 1, characterized in that: The track-type pipeline spraying device further comprises a temperature compensation mechanism (60), and the spraying mechanism (40) is located between the heating mechanism (30) and the temperature compensation mechanism (60).

9. The track-type pipeline spraying device according to claim 8, characterized in that: The temperature compensation mechanism (60) comprises a temperature compensation component fixed to the output end of the walking mechanism (20) and having a second distance maintaining mechanism (62), wherein the temperature compensation component is a second induction coil or an infrared heating device.

10. The track-type pipeline spraying device according to claim 9, characterized in that: The second induction coil (61) can be fed with a medium-frequency current to generate an alternating magnetic field, so that an induction current of the same frequency is generated in the pipeline (70) to compensate for the temperature of the sprayed pipeline (70).

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