Spraying device for inner wall of large-diameter pipe body

Abstract

The utility model relates to a large-caliber pipe body inner wall spraying device which comprises a spraying part, a plurality of rotating bearing parts and a track, the rotating bearing parts are provided with carrier rollers which are used for supporting and enabling a pipe body to rotate in the circumferential direction, the spraying part comprises a machine frame, a probe arm and a spraying device, and the track is arranged on the machine frame. The rack is arranged on the track and moves relative to the rotating bearing part along the track, the probing arm comprises a front probing arm and a rear probing arm, the rear probing arm is installed on the rack, one end of the front probing arm is fixedly connected with the rear probing arm, the other end of the front probing arm is provided with a spraying device, the front probing arm is of a multi-stage nested structure, and the diameter of the front probing arm is gradually decreased from the rear probing arm to the spraying device. A buffer ring is arranged between the nested structures of the two adjacent sections of the front probing arm to form a step-by-step damping structure, by means of the spraying device, dispersed damping is carried out on the spraying device, stable stretching and retracting of the probing arm are achieved, spraying stability is improved, and adaptive adjustment can be carried out according to pipe bodies with different calibers and lengths.

Description

Technical fields:

[0001] This utility model relates to the field of anti-corrosion spraying, and in particular to a spraying device for the inner wall of a large-diameter pipe. Background Technology

[0002] Pipeline inner wall spraying is widely used in petrochemical, gas transmission, water supply and drainage and other fields. By forming a coating on the inner wall of the pipeline, it effectively enhances the corrosion resistance, wear resistance and extends the service life of the pipeline. However, the inner wall protection is usually done manually by brushing anti-corrosion coatings, which has problems such as uneven thickness and low spraying efficiency. When using automated spraying equipment, it is necessary to extend the cantilever structure such as the support into the pipe body. For long pipelines, the spray gun is relatively close to the inner wall of the pipe. The reaction force during the spraying process is perpendicular to the cantilever, which causes the spray gun and support to sway up and down. This leads to changes in the spraying trajectory, uneven coating thickness and difficulty in ensuring coating quality. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model discloses a spraying device for the inner wall of a large-diameter pipe, which includes a spraying part, a rotating bearing part, and a track. There are multiple rotating bearing parts, and each rotating bearing part is provided with a roller that supports and rotates the pipe in the circumferential direction. The spraying part includes a frame, a probe arm, and a spraying device. The frame is set on the track and moves relative to the rotating bearing parts along the track. The probe arm includes a front probe arm and a rear probe arm. The rear probe arm is mounted on the frame. One end of the front probe arm is fixedly connected to the rear probe arm, and the other end is provided with the spraying device. The front probe arm has a multi-level nested structure. The diameter of the front probe arm decreases from the rear probe arm to the spraying device. A buffer ring is provided between the nested structures of adjacent sections of the front probe arm to form a step-by-step shock absorption structure.

[0004] Specifically, the front extension arm includes an outer sleeve and a telescopic rod. There are multiple outer sleeves with progressively smaller diameters, forming a nested structure. Buffer rings are set between the nested outer sleeves. The telescopic rod is set inside the outer sleeve and connected to the end of the outer sleeve at its end. A buffer pad is set between the telescopic rod and the outer sleeve, forming a telescopic linkage mechanism that drives the telescopic rod to extend and retract the outer sleeve.

[0005] Specifically, the buffer ring is a flexible ring structure and is set at the end of the outer sleeve that is nested, and the outer sleeve is provided with a limiting part to prevent the end of the outer sleeve from detaching.

[0006] Specifically, the frame includes a connecting seat, a support frame, and a railcar. The railcar has an installation platform and is set on a rail. The connecting seat and the support frame are fixed on the installation platform of the railcar. The probe arm is hinged to the connecting seat and movably connected to the support frame to form a support structure with an adjustable probe arm angle.

[0007] Specifically, it also includes a lifting device, which is installed on the railcar. The support frame includes uprights, adjusting brackets and locking components. The uprights are installed in pairs on both sides of the probe to form a horizontal limiting structure. The adjusting brackets are horizontally installed between the two uprights. The two ends of the adjusting brackets are connected to the uprights through locking components. The probe is mounted on the adjusting brackets and can be raised or lowered relative to the uprights by the lifting device.

[0008] Specifically, the lifting device includes a lifting rod, which is connected to an adjusting bracket. A support shaft is installed on the adjusting bracket, which is arranged horizontally along the adjusting bracket and abuts against the probe arm to form a friction buffer ring between the adjusting bracket and the probe arm.

[0009] Specifically, the rear extension arm has a steel truss structure, and a counterweight is fixed on the rear extension arm.

[0010] Specifically, the rotating bearing part also includes a fixed seat and a drive device. The fixed seat has an installation groove, and the idler roller is connected to the fixed seat through the installation groove. The drive device is mounted on the fixed seat and is connected to the idler roller for transmission.

[0011] Specifically, it also includes an airless sprayer, which is mounted on a frame and connected to the spraying device via a hose.

[0012] Advantages and effects

[0013] This invention uses a nested outer sleeve and a buffer ring to disperse and reduce vibration in the spraying device; a telescopic rod and a buffer ring to achieve smooth extension and retraction of the probe arm; a connecting seat and a support frame to adjust the height and angle of the probe arm to adapt to steel pipes of different diameters and lengths; and a fixed structure between the rear and front probe arms to reinforce the probe arm as a whole and improve spraying stability. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the front extension arm of this utility model;

[0016] Figure 3 This is a structural schematic diagram showing the position of the support frame of this utility model;

[0017] Figure 4 This is a schematic diagram of the rotating bearing part of this utility model.

[0018] Legend: 1. Spraying section; 11. Frame; 111. Connecting seat; 112. Support frame; 1121. Stand; 1122. Adjusting bracket; 1123. Locking element; 113. Track car; 12. Probe arm; 121. Front probe arm; 1211. Outer sleeve; 1212. Telescopic rod; 1213. Limiting part; 122. Rear probe arm; 13. Spraying device; 14. Buffer ring; 15. Support shaft; 16. Counterweight; 2. Rotating bearing part; 21. Idler roller; 22. Fixed seat; 23. Drive device; 3. Track; 4. Lifting device; 41. Lifting rod; 5. Airless sprayer. 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 1-4As shown, this utility model relates to a spraying device for the inner wall of a large-diameter pipe. It includes a spraying section 1, a rotating support section 2, and a track 3. Multiple rotating support sections 2 are arranged in pairs. Each rotating support section 2 is equipped with a roller 21 to support and rotate the pipe circumferentially. The spraying section 1 includes a frame 11, a probe arm 12, and a spraying device 13. The frame 11 is mounted on the track 3 and moves relative to the rotating support section 2 along the track 3. The direction of movement of the frame 11 is parallel to the axial direction of the pipe. Arm 12 includes a front probe arm 121 and a rear probe arm 122. The rear probe arm 122 is mounted on the frame 11. One end of the front probe arm 121 is fixedly connected to the rear probe arm 122, and the other end is equipped with a spraying device 13. The spraying device 13 is a spray gun structure connected to the paint through a pipeline and atomizes and sprays the paint using a spray nozzle. The rear probe arm 122 is connected and fixed to the frame 11 to stabilize the front probe arm 121. The front probe arm 121 has a multi-level nested structure, extending from the rear probe arm 122 to the spraying device 13. The diameter of the front probe arm 121 decreases gradually. Buffer rings 14 are set between the nested structures of adjacent sections of the front probe arm 121 to form a progressively damping structure. The probe arm 121 extends into the tube body by moving the frame 11 on the track 3. Due to the changes in spraying speed and pressure when the spraying device 13 is working, the cantilevered front probe arm 121 is prone to swinging up and down, causing uneven spraying. Therefore, the front probe arm 121 is set as a multi-segment sleeve structure. The tail of each sleeve segment overlaps with the front of the next sleeve segment to provide support. At the same time, there is a certain gap between the sleeves to buffer the counter-thrust during spraying. Buffer rings 14 are also set between the multiple segments. Preferably, the buffer rings 14 are rubber gaskets fitted onto the ends of the sleeves, and the number is greater than or equal to two. In this way, when the vibration during the spraying process is transmitted from the front end of the front probe arm 121 to the rear, the vibration is buffered by the buffer rings 14. At the same time, the multiple buffer rings 14 also disperse the vibration to reduce the superposition effect.

[0025] like Figure 2 As shown, to accommodate pipes of different widths and sizes, the front probe arm 121 includes an outer sleeve 1211 and a telescopic rod 1212. The number of outer sleeves 1211 is multiple, and the pipe diameter decreases in stages to form a nested structure. A buffer ring 14 is set between the nested outer sleeves 1211. The telescopic rod 1212 is set inside the outer sleeve 1211 and is connected to the end of the outer sleeve 1211 at its end. A buffer ring is set between the telescopic rod 1212 and the outer sleeve 1211 to form a telescopic linkage mechanism in which the telescopic rod 1212 drives the outer sleeve 1211. The telescopic mechanism controls the extension or retraction of the outer sleeve 1211 to adjust the length of the front probe arm 121, increasing the probe arm's spraying range while avoiding the problem of unstable spraying caused by the need to move the frame 11 to move the spraying position.

[0026] The outer sleeve 1211 is provided with a limiting part 1213 to prevent the end of the outer sleeve 1211 from detaching. The inner wall of the front end of each section of the outer sleeve 1211 cooperates with the outer wall of the other sleeve 1211 to form a limiting. The buffer ring 14 is provided on both sides of the limiting part 1213 on the outer wall of the outer sleeve 1211. The buffer ring 14 on the front side of the limiting part 1213 serves as a flexible structure on the sleeved outer sleeves 1211 corresponding to the limiting part 1213, reducing the collision and vibration caused by direct contact between the limiting parts 1213, and reducing the jerking during the extension and retraction of the front extension arm 121, making the extension and retraction of the front extension arm 121 more stable.

[0027] like Figure 1 As shown, the frame 11 includes a connecting seat 111, a support frame 112, and a railcar 113. The railcar 113 has an installation platform and is set on the rail 3. The connecting seat 111 and the support frame 112 are fixed on the installation platform of the railcar 113. The probe arm 12 is hinged to the connecting seat 111 and movably connected to the support frame 112 to form a support structure that can adjust the angle of the probe arm 12. The connecting seat 111 and the support frame 112 are respectively connected to the end and middle of the rear probe arm 122 to form a multi-point fixation. The height of the connecting seat 111 and the support frame 112 is adjustable to adapt to different pipe bodies and spraying materials. At the same time, the connecting seat 111 mainly serves to fix the initial height of the probe arm 12. The support frame 112 adopts a movable structure that is easy to adjust the height to fine-tune the spraying distance of the probe arm 12. Preferably, the angle between the probe arm 12 and the axis of the pipe body does not exceed 6°. If the angle is greater than this, it is easy for the probe arm to interfere with the wider pipe body when moving for spraying.

[0028] like Figure 3 As shown, specifically, it also includes a lifting device 4, which is mounted on the railcar 113. The support frame 112 includes a vertical frame 1121, an adjusting bracket 1122, and a locking element 1123. The vertical frames 1121 are arranged in pairs on both sides of the probe arm 12 to form a horizontal limiting structure. The adjusting bracket 1122 is horizontally arranged between the two vertical frames 1121. Both ends of the adjusting bracket 1122 are connected to the vertical frames 1121 through the locking element 1123. The probe arm 12 is mounted on the adjusting bracket 1122 and can be raised or lowered relative to the vertical frame 1121 by the lifting device 4. The vertical frame 1121 can be... The adjusting bracket 1122 is movably connected to the adjusting bracket 1122 by setting a movable slot or a connecting ear, so that the adjusting bracket 1122 can move vertically on the upright 1121. The lifting device 4 can be directly connected to the rear probe arm 122 to adjust the probe arm angle. After the angle adjustment is completed, the probe arm 12 is fixed by the adjusting bracket 1122 to complete the angle adjustment. Alternatively, the lifting device 4 can be used to directly adjust the height of the adjusting bracket 1122 to adjust the angle of the probe arm 12. After the adjustment is completed, the adjusting bracket 1122 is fixed to the upright 1121 by the locking member 1123.

[0029] Specifically, the lifting device 4 includes a lifting rod 41, which is connected to an adjusting bracket 1122. A supporting rotating shaft 15 is installed on the adjusting bracket 1122. The supporting rotating shaft 15 is arranged horizontally along the adjusting bracket 1122 and abuts against the probe arm 12, forming a friction buffer ring between the adjusting bracket 1122 and the probe arm 12. By controlling the lifting device 4, the height of the adjusting bracket 1122 is adjusted, and the probe arm 12 is raised to achieve changes in height and angle. Since the probe arm 12 abuts against the adjusting bracket 1122, the supporting rotating shaft 15 can reduce the friction between the two and make the probe arm 12 rise and fall evenly.

[0030] The rear probe arm 122 is reinforced with a steel truss structure to increase structural strength and reduce vibration during spraying. A counterweight 16 is fixed on the rear probe arm 122 to stabilize it. The counterweight 16 is located on the upper part of the rear probe arm 122 where it abuts against the adjusting bracket 1122, so that the counterweight pressure is directly transmitted to the support frame 112 and stabilizes the rear probe arm 122. At the same time, the front probe arm 121 connected to the front end is structurally reinforced.

[0031] like Figure 1 , Figure 4 As shown, the rotating bearing part 2 also includes a fixed base 22 and a driving device 23. The fixed base 22 is provided with an installation groove 221. The idler roller 21 is connected to the fixed base 22 through the installation groove 221. The driving device 23 is set on the fixed base 22 and is connected to the idler roller 21 for transmission. The idler roller 21 moves on the installation groove 211 to adjust the spacing to adapt to steel pipes of different diameters. The driving device 23 is a transmission motor used to drive the idler roller to rotate the pipe.

[0032] It also includes an airless sprayer 5, which is mounted on the frame 11 and connected to the spraying device 13 via a hose. The airless sprayer 5 connects to the paint chamber and uses high pressure to form fine atomized particles of paint at the end of the spraying device 13, which are then evenly sprayed onto the inner wall of the pipe to perform anti-corrosion treatment on the inner surface of the steel pipe. At the same time, the airless sprayer 5 avoids the influence of the introduction of compressed air on the stability of the spraying device 13 and reduces vibration during spraying, thus reducing uneven spraying.

[0033] The working process of this utility model is as follows: the steel pipe body is placed on the roller 21 of the rotating bearing part 2, the moving railcar 113 moves the probe arm 12 towards the inner wall of the pipe, and at the same time the distance of the probe arm 12 into the pipe and the distance between the spraying device 13 and the inner wall of the pipe can be adjusted by the telescopic rod 1212 and the lifting device 4. The drive device 23 is started to rotate the pipe body, and at the same time the airless sprayer 5 works and sprays the inner wall of the pipe through the spraying device 13. During the working process, the position of the railcar 113 can be adjusted to change the spraying position and spraying time, and one or more sprayings can be performed.

[0034] 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 spraying device for the inner wall of a large-diameter pipe, characterized in that, It includes a spraying section (1), a rotating support section (2), and a track (3). The rotating support section (2) has multiple sections, each equipped with a roller (21) that supports and rotates the pipe circumferentially. The spraying section (1) includes a frame (11), probe arms (12), and a spraying device (13). The frame (11) is mounted on the track (3) and moves relative to the rotating support section (2) along the track (3). The probe arms (12) include a front probe arm (121) and a rear probe arm (122). The rear probe arm (122) is mounted on the frame (11), and one end of the front probe arm (121)... The front probe (121) is fixedly connected to the rear probe arm (122) and a spraying device (13) is provided at the other end. The front probe arm (121) is a multi-level nested structure. The front probe arm (121) includes multiple outer sleeves (1211). The diameter of the outer sleeves (1211) decreases step by step to form a nested structure. Buffer rings (14) are provided between the nested outer sleeves (1211) to form a step-by-step shock absorption structure. The buffer rings (14) are flexible ring structures and are provided at the nested ends of the outer sleeves (1211). The outer sleeves (1211) are provided with limiting parts (1213) to restrict the ends of the outer sleeves (1211) from detaching.

2. The large-diameter pipe inner wall spraying device according to claim 1, characterized in that, The front extension arm (121) also has a telescopic rod (1212), which is located inside the outer sleeve (1211) and connected to the end of the outer sleeve (1211) at its end. A buffer pad is provided between the telescopic rod (1212) and the outer sleeve (1211) to form a telescopic linkage mechanism in which the telescopic rod (1212) drives the outer sleeve (1211) to extend and retract.

3. The large-diameter pipe inner wall spraying device according to claim 1, characterized in that, The frame (11) includes a connecting seat (111), a support frame (112), and a railcar (113). The railcar (113) has an installation platform and is set on the rail (3). The connecting seat (111) and the support frame (112) are fixed on the installation platform of the railcar (113). The probe arm (12) is hinged to the connecting seat (111) and movably connected to the support frame (112) to form a support structure with an adjustable probe arm (12) angle.

4. The large-diameter pipe inner wall spraying device according to claim 3, characterized in that, It also includes a lifting device (4), which is mounted on the railcar (113). The support frame (112) includes a vertical frame (1121), an adjusting bracket (1122), and a locking element (1123). The vertical frames (1121) are arranged in pairs on both sides of the probe arm (12) to form a horizontal limiting structure. The adjusting bracket (1122) is horizontally arranged between the two vertical frames (1121). The two ends of the adjusting bracket (1122) are connected to the vertical frames (1121) through the locking element (1123). The probe arm (12) is mounted on the adjusting bracket (1122) and can be raised or lowered relative to the vertical frames (1121) by the lifting device (4).

5. The large-diameter pipe inner wall spraying device according to claim 4, characterized in that, The lifting device (4) includes a lifting rod (41), which is connected to an adjusting bracket (1122). A supporting rotating shaft (15) is installed on the adjusting bracket (1122). The supporting rotating shaft (15) is arranged horizontally along the adjusting bracket (1122) and abuts against the probe arm (12) to form a friction buffer ring between the adjusting bracket (1122) and the probe arm (12).

6. The large-diameter pipe inner wall spraying device according to claim 5, characterized in that, The rear probe arm (122) is a steel truss structure, and a counterweight (16) is fixedly mounted on the rear probe arm (122).

7. The large-diameter pipe inner wall spraying device according to claim 1, characterized in that, The rotating bearing part (2) further includes a fixed seat (22) and a driving device (23). The fixed seat (22) has an installation groove (221). The idler roller (21) is connected to the fixed seat (22) through the installation groove (221). The driving device (23) is set on the fixed seat (22) and is connected to the idler roller (21) for transmission.

8. The large-diameter pipe inner wall spraying device according to claim 1, characterized in that, It also includes an airless sprayer (5), which is mounted on a frame (11) and connected to the spraying device (13) via a hose.

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