Spraying device for inner wall of elbow with large inner diameter

Abstract

A spraying device for the inner wall of a large-inner-diameter elbow relates to the technical field of pipeline processing and comprises a spraying mechanism and a winch, the spraying mechanism is arranged in an inner cavity of the large-inner-diameter elbow, the winch drags the spraying mechanism to move in the inner cavity of the elbow through a traction rope, and meanwhile, a rotary spray head rotates to spray the inner wall of the elbow under the driving of a pneumatic driving module. According to the elbow spraying device, manual spraying operation in an elbow is not needed, the harm of spraying operation to constructors is reduced, meanwhile, spraying is uniform, and the spraying quality is good.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline processing, in particular to an inner wall spraying device for large-diameter elbows. Background Art

[0002] In the fields of petroleum, chemical engineering, water conveyance projects, etc., large-diameter pipelines are widely used, and the pipeline diameter can reach more than 1 meter. At the pipeline turning point, elbows are used for connection. In actual applications, in order to increase the anti-corrosion ability of the pipeline, it is necessary to carry out anti-corrosion treatment on the inner wall of the pipeline, spray an anti-corrosion layer on the inner wall of the pipeline, and the corresponding elbows also need to be anti-corrosion treated. The existing operation method of manually drilling into the elbow for spraying has low spraying efficiency, difficult to guarantee the spraying quality, and the spraying pollutants accumulated in the elbow seriously affect the physical health of the operators. Therefore, the industry urgently needs an inner wall spraying device for large-diameter elbows. Summary of the Utility Model

[0003] The purpose of the utility model is to provide an inner wall spraying device for large-diameter elbows, which is used to improve the spraying operation efficiency of the inner wall of large-diameter elbows, improve the spraying quality, and reduce the harm of spraying operations to construction workers.

[0004] To achieve the above purpose, the utility model adopts the following technical solutions:

[0005] An inner wall spraying device for large-diameter elbows includes a spraying mechanism and a winch. The spraying mechanism is arranged in the inner cavity of the large-diameter elbow, and the winch drives the spraying mechanism to move through a traction rope; the spraying mechanism includes a paint hose, a high-pressure air hose, an upper cross support, a lower cross support one, a lower cross support two, a support wheel, a pneumatic drive module, a central support pipe, a traction ear, a rotary spray head, a manual adjustment block, a movable support seat, and a fixed support seat. The upper cross support, the lower cross support one, and the lower cross support two each include two support rods hinged together. At one end of the support rod close to the inner wall of the large-diameter elbow, a support wheel is installed. At the other end of the two support rods, one is hinged to the movable support seat, and the other is hinged to the fixed support seat; the outer surface of the right side of the central support pipe is provided with threads, and the manual adjustment block moves on the central support pipe through the threads. The inner cavity of the movable support seat has no threads and is movably sleeved on the central support pipe. A fixed support seat is provided at the left end of the central support pipe. The pneumatic drive module is fixed to the fixed support seat. The rotary spray head is rotatably installed on the pneumatic drive module. The traction ear is fixedly installed at the right end of the central support pipe. The paint hose and the high-pressure air hose penetrate into the inner cavity of the central support pipe and are respectively connected to the rotary spray head and the pneumatic drive module.

[0006] In the above-mentioned inner wall spraying device for large-diameter elbows, the upper cross support, the lower cross support one, and the lower cross support two are arranged at intervals of degrees in the vertical section.

[0007] For the inner wall spraying device of the large inner diameter elbow mentioned above, the supporting wheels on the same side of the lower cross support one and the lower cross support two are set to be telescopic, and the supporting wheels can elastically expand and contract through springs and telescopic rods.

[0008] The utility model has the following advantages:

[0009] For the inner wall spraying device of the large inner diameter elbow of the utility model, during the inner wall spraying operation, the spraying mechanism is placed in the inner cavity of the elbow, and the winch is used to pull the spraying mechanism to move in the elbow. At the same time, the rotating nozzle rotates and sprays on the inner wall of the elbow under the drive of the pneumatic drive module. The utility model does not require manual spraying operation inside the elbow, reduces the harm of the spraying operation to construction workers, and at the same time has uniform spraying and good spraying quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic top view of the utility model;

[0011] Figure 2 It is a view from direction B;

[0012] Figure 3 It is a rotating sectional view taken along A-A;

[0013] Figure 4 It is a schematic diagram of the partial structure at the elastically telescopic supporting wheel;

[0014] In the figure, each label represents respectively: 1. large inner diameter elbow, 2. spraying mechanism, 3. winch, 3-1. towing rope, 4. paint hose, 5. high-pressure air hose, 2-1. upper cross support, 2-2. lower cross support one, 2-3. lower cross support two, 2-4. supporting wheel, 2-5. pneumatic drive module, 2-6. central support pipe, 2-7. towing ear, 2-8. rotating nozzle, 2-9. manual adjustment block, 2-10. movable support seat, 2-11. fixed support seat, 2-12. spring, 2-13. telescopic rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] The following further describes the utility model in conjunction with the drawings and embodiments.

[0016] The inner wall spraying device of the large inner diameter elbow of the utility model, as Figure 1 shown, during the operation, the spraying mechanism 2 is placed into the inner cavity of the large inner diameter elbow 1, and the winch 3 is used to pull the spraying mechanism 2 to move in the inner cavity of the large inner diameter elbow 1, thereby completing the inner wall spraying work.

[0017] The inner wall spraying device of the large inner diameter elbow of the utility model, as Figure 2 and Figure 3As shown in the figure, the spraying mechanism 2 includes a paint hose 4, a high-pressure air hose 5, an upper cross support 2-1, a lower cross support one 2-2, a lower cross support two 2-3, a support wheel 2-4, a pneumatic drive module 2-5, a central support pipe 2-6, a traction ear 2-7, a rotary spray head 2-8, a manual adjustment block 2-9, a movable support seat 2-10, and a fixed support seat 2-11. Support wheels 2-4 are provided on the upper cross support 2-1, the lower cross support one 2-2, and the lower cross support two 2-3. The support wheels 2-4 are pressed against the inner wall of the large-diameter elbow 1. The upper cross support 2-1, the lower cross support one 2-2, and the lower cross support two 2-3 are evenly distributed at intervals of 120 degrees in the vertical section, ensuring that the central support pipe 2-6 is always located on the center line of the large-diameter elbow 1.

[0018] For the inner wall spraying device of the large-diameter elbow of the present utility model, both ends of the upper cross support 2-1, the lower cross support one 2-2, and the lower cross support two 2-3 close to the elbow center line are respectively hinged to the movable support seat 2-10 and the fixed support seat 2-11. A thread is provided on the central support pipe 2-6. Rotating the manual adjustment block 2-9 can push the movable support seat 2-10 to move left and right, so that the spraying mechanism 2 can be applicable to elbows with different inner diameter sizes.

[0019] For the inner wall spraying device of the large-diameter elbow of the present utility model, a pneumatic drive module 2-5 and a rotary spray head 2-8 are provided at the left end of the central support pipe 2-6. The paint hose 4 passes through the inner cavity of the central support pipe 2-6 and is connected to the rotary spray head 2-8 through a rotary joint. The high-pressure air hose 5 passes through the inner cavity of the central support pipe 2-6 and is connected to the pneumatic drive module 2-5. During operation, the pneumatic drive module 2-5 drives the rotary spray head 2-8 to rotate through high-pressure gas, and then sprays paint on the inner wall of the elbow.

[0020] For the inner wall spraying device of the large-diameter elbow of the present utility model, during the spraying operation, the rotary spray head 2-8 is arranged at the tail end in the advancing direction of the spraying mechanism 2 to prevent the coating from leaving indentations of the support wheels 2-4. A frame tooling for supporting the spraying mechanism 2 needs to be erected at the end of the large-diameter elbow 1 in the advancing direction of the spraying mechanism 2. When the spraying mechanism 2 moves outside the end of the large-diameter elbow 1, it can also ensure the smooth completion of the spraying work of the rotary spray head 2-8 on the inner wall of the end of the large-diameter elbow 1.

Claims

1. An inner wall spraying device for a large inner diameter elbow, characterized in that: It includes a spraying mechanism (2) and a winch (3). The spraying mechanism (2) is arranged in the inner cavity of the large-diameter elbow (1), and the winch (3) pulls the spraying mechanism (2) to move through a traction rope (3-1); the spraying mechanism (2) includes a paint hose (4), a high-pressure air hose (5), an upper cross support (2-1), a lower cross support one (2-2), a lower cross support two (2-3), support wheels (2-4), a pneumatic drive module (2-5), a central support pipe (2-6), a traction ear (2-7), a rotary spray head (2-8), a manual adjustment block (2-9), a movable support seat (2-10), and a fixed support seat (2-11). The upper cross support (2-1), the lower cross support one (2-2), and the lower cross support two (2-3) each include two support rods hinged together. At one end of each support rod close to the inner wall of the large-diameter elbow (1), a support wheel (2-4) is installed. At the other end of the two support rods, one is hinged to the movable support seat (2-10), and the other is hinged to the fixed support seat (2-11); the outer surface of the right side of the central support pipe (2-6) is provided with threads, and the manual adjustment block (2-9) moves on the central support pipe (2-6) through the threads. The inner cavity of the movable support seat (2-10) has no threads and is movably sleeved on the central support pipe (2-6). At the left end of the central support pipe (2-6), there is a fixed support seat (2-11). The pneumatic drive module (2-5) is fixed to the fixed support seat (2-11). The rotary spray head (2-8) is rotatably installed on the pneumatic drive module (2-5). The traction ear (2-7) is fixedly installed at the right end of the central support pipe (2-6). The paint hose (4) and the high-pressure air hose (5) penetrate into the inner cavity of the central support pipe (2-6) and are respectively connected to the rotary spray head (2-8) and the pneumatic drive module (2-5).

2. The inner wall spraying device for large-diameter elbows according to claim 1, characterized in that: The upper cross support (2-1), the lower cross support one (2-2), and the lower cross support two (2-3) are arranged at intervals of 120 degrees from each other in the vertical section.

3. The inner wall spraying device for a large inner diameter elbow according to claim 1, wherein: The support wheels (2-4) on the same side of the lower cross support one (2-2) and the lower cross support two (2-3) are set to be telescopic, and the support wheels (2-4) can elastically expand and contract through springs (2-12) and telescopic rods (2-13).

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