Anti-corrosion heat shrink tube laying device for oil and gas pipeline
By directly extruding and moving the heat shrink pipe outside the oil and gas pipeline, combined with adhesive spraying and compression mechanism, the problems of uneven winding and adhesion failure are solved, the anti-corrosion effect and construction efficiency are improved, and efficient sealing is achieved.
Patent Information
- Application Number
- CN202411315702.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-20
- Publication Date
- 2024-12-10
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The existing heat shrink wrap belts have problems in the anti-corrosion construction of oil and gas pipelines, resulting in poor sealing effect and low construction efficiency.
The heat shrink tube is directly extruded outside the oil and gas pipeline using an annular extruder and screw extruder. The heat shrink tube is directly extruded outside the oil and gas pipeline, and the sliding rail bracket movement and adhesive spraying mechanism achieve smooth coverage and curing, eliminating the winding joints and manual heating steps.
It improves corrosion resistance and construction efficiency, ensures smooth coverage and firm fixation of the heat shrink tube, reduces manual operation and heating time, and enhances sealing performance.
Smart Images
Figure CN119103434A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of oil and gas pipeline anticorrosion, in particular to an oil and gas pipeline anticorrosion heat shrink tube auxiliary device, and may specifically involve an international patent classification number of F16L58 / 00. Background Art
[0002] Heat shrink anti-corrosion refers to the use of heat shrink wrapping tape to prevent corrosion on welds, elbows, and patching joints of pipes used for oil, gas, water supply and drainage pipes, and insulation pipes.
[0003] The heat shrink wrap is made of a cross-linked polyolefin substrate and hot melt adhesive. During pipeline anti-corrosion construction, first spray the anti-corrosion adhesive on the outer surface of the pipeline, then wrap the heat shrink wrap around the outside of the pipeline and use flame baking to melt the hot melt adhesive and shrink the cross-linked polyolefin substrate. The heat-shrinkable heat shrink wrap is then rolled flat repeatedly by a rolling wheel to expel the air trapped inside.
[0004] There are two problems to be improved in the construction of heat shrinkable anti-corrosion using heat shrink wrapping tape: The heat shrink wrap is fixed on the pipe by winding. The starting point of the wrap cannot have a seamless and smooth transition. After heat shrinking, it is necessary to focus on rolling this position to eliminate the air gap. If the hot melt adhesive fails to adhere, the starting point will easily shrink under the action of stress to produce a gap, causing the seal at this position to fail and the anti-corrosion effect to deteriorate. The end point of the heat shrink wrap is fixed by hot melt adhesive. When the hot melt adhesive fails to adhere due to periodic temperature changes, the heat shrink wrap is easy to peel off.
[0005] The wrapping construction is time-consuming and requires at least two people to flame bake at the same time to ensure the uniform shrinkage of the heat shrink wrap. After the heat shrinkage is completed, the surface of the heat shrink wrap needs to be repeatedly rolled to expel the air. Summary of the invention
[0006] The technical problem to be solved by the present invention is to provide an auxiliary device for anti-corrosion pipes for oil and gas pipeline joints in response to the above-mentioned technical deficiencies. The device can extrude a tubular heat shrink tube around the outer surface of the oil and gas pipeline. After the heat shrink tube shrinks, the tubular body is sleeved on the outer surface of the oil and gas pipeline as a whole. There is no need to wrap it, the surface is smooth and there are no joints. The exhaust effect is good during the shrinkage of the heat shrink tube, thereby improving the anti-corrosion effect and construction efficiency.
[0007] The present invention provides an auxiliary device for an oil and gas pipeline anti-corrosion heat shrink tube, comprising: An annular extrusion piece, the annular extrusion piece is configured to surround the outside of the oil and gas pipeline and extrude a heat shrink tube; an annular heating chamber is provided inside the annular extrusion piece; the annular heating chamber is provided with an annular extrusion port that is in communication with the outside; Screw extruder; the upper end discharge port of the screw extruder is connected to the annular heating chamber; the lower feed port of the screw extruder is connected to the raw material hopper; Slide rail bracket; the slide rail bracket includes two positioning brackets and a guide slide rail connected between the two positioning brackets; each positioning bracket is detachably connected to the oil and gas pipeline; The annular extrusion piece is divided into two halves in the vertical direction, and the two halves are detachably connected; the upper half is slidably matched with the guide rail in the horizontal direction; and the lower half is fixedly connected to the screw extruder.
[0008] To further optimize the technical solution, an auxiliary device for anti-corrosion heat shrink tubing for oil and gas pipelines also includes an adhesive spraying mechanism; the adhesive spraying mechanism is located on the side of the annular extrusion piece away from the annular extrusion port and is fixedly connected to the upper half; the adhesive spraying mechanism includes a C-shaped flexible conduit, and the oil and gas pipeline can pass through the inner circle of the flexible conduit through the deformation of the opening of the flexible conduit; a plurality of nozzles are distributed on the inner side surface of the flexible conduit; the plurality of nozzles are used to spray and cover the outer surface of the oil and gas pipeline with adhesive; a conduit for supplying adhesive is connected to the flexible conduit; the other end of the conduit is connected to an external adhesive pumping device.
[0009] To further optimize the technical solution, an auxiliary device for anti-corrosion heat shrink tubing for oil and gas pipelines also includes a clamping mechanism; the clamping mechanism is located on the side of the annular extrusion port relative to the annular extrusion piece and is fixedly connected to the upper half; the clamping mechanism includes a C-shaped flexible bracket, and the oil and gas pipeline can pass through the inner ring of the flexible bracket through the deformation of the opening of the flexible bracket; a clamping brush is installed on the inner side of the flexible bracket; the inner diameter of the clamping brush is smaller than the outer diameter of the oil and gas pipeline.
[0010] To further optimize the technical solution, an auxiliary device for anti-corrosion heat shrink tubing for oil and gas pipelines also includes a driving mechanism; the driving mechanism includes a transmission screw installed between two positioning frames and a driving motor installed on a positioning frame on one side; the power output end of the driving motor is coupled to the transmission screw, and the transmission screw is matched with the upper half screw for transmission.
[0011] To further optimize the technical solution, an auxiliary device for anti-corrosion heat shrink tubing for oil and gas pipelines also includes an inverted U-shaped wind shield, which is detachably connected to two positioning frames; the coverage of the wind shield is used to shield the extruded heat shrink tubing from top to bottom.
[0012] To further optimize the technical solution, an auxiliary device for anti-corrosion heat shrink tubing for oil and gas pipelines is provided, wherein the inverted U-shaped windshield is made of a transparent material.
[0013] Different from the existing heat shrink wrapping tape wrapping method, the present invention does not adopt the wrapping method. During the laying operation, the annular extrusion piece is divided into two halves and fixed around the periphery of the oil and gas pipeline, and the movement along the length direction of the oil and gas pipeline is achieved by the slide rail bracket; the molten material of the heat shrinkable tube is heated and extruded by a screw extruder, and the heat shrinkable tube is directly extruded around the periphery of the oil and gas pipeline. The extruded heat shrinkable tube directly covers the oil and gas pipeline inside the tube, so that no entangled joints are generated. In the traveling direction, the heat shrinkable tube discharges air outward as it shrinks, and after heat shrinkage, it covers the surface of the oil and gas pipeline smoothly and firmly; the heat shrinkable tube after extrusion is free from the limitation of the annular extrusion port, and will shrink evenly due to its own heat, so there is no need to manually heat it again.
[0014] Other technical effects of the present invention will become clearer as the embodiments are described. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention; Figure 2 for Figure 1 A cross-sectional schematic diagram of; Figure 3 It is a structural schematic diagram of Example 2; Figure 4 This is a schematic diagram of the structure of Example 3.
[0016] In the figure, 1. annular extrusion part; 2. heat shrink tube; 3. annular heating chamber; 4. annular extrusion port; 5. screw extruder; 6. raw material bucket; 7. slide rail bracket; 8. positioning frame; 9. guide slide rail; 10. oil and gas pipeline; 11. half body; 12. adhesive spraying mechanism; 13. flexible conduit; 14. nozzle; 15. conduit; 16. clamping mechanism; 17. flexible bracket; 18. clamping brush; 19. transmission screw; 20. driving motor; 21. wind shield; 22. fastening bolts; 23. rubber pad; 24. welding seam; 25. heater; 26. clamp. DETAILED DESCRIPTION
[0017] like Figure 1-2 Example 1 shown: The present embodiment provides an auxiliary device for anti-corrosion heat shrink tubes for oil and gas pipelines, comprising an annular extrusion 1, wherein the annular extrusion 1 is configured to surround the outside of the oil and gas pipeline 10 and extrude a heat shrink tube 2; an annular heating chamber 3 is provided inside the annular extrusion 1; the annular heating chamber 3 is provided with an annular extrusion port 4 that is in communication with the outside; Screw extruder 5; the upper end discharge port of the screw extruder 5 is connected to the annular heating chamber 3; the lower feed port of the screw extruder 5 is connected to the raw material hopper 6; Slide rail bracket 7; the slide rail bracket 7 includes two positioning brackets 8, and a guide rail 9 connected between the two positioning brackets; each of the positioning brackets 8 is detachably connected to the oil and gas pipeline 10; The annular extrusion piece 1 is evenly divided into two halves 11 in the vertical direction, and the two halves 11 are detachably connected; the upper half is slidably matched with the guide rail 9 in the horizontal direction; and the lower half is fixedly connected to the screw extruder 5.
[0018] The oil and gas pipelines in the present invention generally refer to oil pipelines and gas pipelines that require surface anti-corrosion treatment; the sizes of the annular extrusion 1 and the slide rail bracket 7 can be adapted according to the outer diameters of oil and gas pipelines of different sizes.
[0019] During the laying operation, the slide rail bracket 7 is first installed on the oil and gas pipeline 10, and the two positioning brackets 8 span the two sides of the weld seam 24 between the two pipe columns. The positioning bracket 8 is an inverted U-shape. After it is hoisted on the oil and gas pipeline 10, the slide rail bracket 7 is fixed to the oil and gas pipeline 10 by the fastening bolts 22. In order to prevent the surface of the oil and gas pipeline 10 from being damaged, rubber pads 23 are provided between the positioning bracket 8 and the fastening bolts 22 and the oil and gas pipeline 10 for protection.
[0020] Then, the adhesive is evenly applied to the outer surface of the oil and gas pipeline 10, and then the lower half of the annular extrusion piece 1 and the upper half are butt-jointed and installed by bolts; the PE masterbatch particles and the cross-linking aid of the heat shrinkable tube 2 are loaded into the raw material hopper 6, and the heaters 25 of the screw extruder 5 and the annular heating chamber 3 are started for preheating; after the preheating is completed, the screw extruder 5 is started, and the heat shrinkable tube 2 is extruded from the annular extrusion port 4 and the diameter shrinks and is sleeved on the outside of the oil and gas pipeline 10. At this time, the heat shrinkable tube 2 can be temporarily fixed to the oil and gas pipeline 10 by a clamp 26. As the heat shrinkable tube 2 is extruded, the annular extrusion piece 1 is manually pushed to move on the slide rail bracket 7, so that the heat shrinkable tube 2 is in a stretched and tensioned state. Due to the stretching of the heat shrinkable tube 2 in the length direction and its own heat shrinkage, the heat shrinkable tube 2 will be tightly sleeved on the outer surface of the oil and gas pipeline 10; after reaching the predetermined covering length, the screw extruder 5 is stopped, the heat shrinkable tube 2 is cut in front of the annular extrusion port 4, and then temporarily fixed by a clamp; when the adhesive is cured, the clamps at both ends can be removed.
[0021] A further optimized embodiment, an auxiliary device for anti-corrosion heat shrink tube of oil and gas pipeline, also includes an adhesive spraying mechanism 12; the adhesive spraying mechanism 12 is located on the side of the annular extrusion piece 1 away from the annular extrusion port 4 and is fixedly connected to the upper half 11; the adhesive spraying mechanism 12 includes a C-shaped flexible conduit 13, and the oil and gas pipeline 10 can pass through the inner circle of the flexible conduit 13 through the deformation of the opening of the flexible conduit 13; a plurality of nozzles 14 are distributed on the inner side surface of the flexible conduit 13; the plurality of nozzles 14 are used to spray and cover the outer surface of the oil and gas pipeline 10 with adhesive; a conduit 15 for supplying adhesive is connected to the flexible conduit 13; the other end of the conduit 15 is connected to an external adhesive pumping device.
[0022] Compared with manually applying adhesive and then wrapping with heat shrink tape, spraying adhesive through adhesive spraying mechanism 12 is more efficient. Adhesive spraying mechanism 12 and annular extrusion member 1 are linked on slide rail bracket 7. After adhesive spraying, it immediately enters the coverage of heat shrink tube 2 and is squeezed immediately. It is not easy to cause uneven thickness due to flow caused by gravity. The function of applying adhesive is to make heat shrink tube 2 and oil and gas pipeline 10 firmly bonded. When excess adhesive is squeezed out of heat shrink tube 2, it will be squeezed out together with the air in the gap.
[0023] A further optimized embodiment, an auxiliary device for anti-corrosion heat shrink tube of oil and gas pipeline, also includes a clamping mechanism 15; the clamping mechanism 15 is located on the side of the annular extrusion piece 1 facing the annular extrusion port 4 and is fixedly connected to the upper half 11; the clamping mechanism 15 includes a C-shaped flexible bracket 17, and the oil and gas pipeline 10 can pass through the inner circle of the flexible bracket 17 through the deformation of the opening of the flexible bracket 17; a clamping brush 18 is installed on the inner side of the flexible bracket 17; the inner diameter of the clamping brush 18 is smaller than the outer diameter of the oil and gas pipeline 10.
[0024] The function of the pressing brush 18 is to assist in squeezing and flattening the heat shrink tube 2, especially when passing through the pipeline welding seam 24, which is helpful to apply pressure to discharge air and excess adhesive from the uneven part of the welding seam 24.
[0025] like Figure 3 As shown, Example 2: The difference between this embodiment and embodiment 1 is that it also includes a driving mechanism; the driving mechanism includes a transmission screw 19 installed between the two positioning frames 8 and a driving motor 20 installed on one side of the positioning frame 8; the power output end of the driving motor 20 is transmission coupled with the transmission screw 19, and the transmission screw 19 is transmission-coordinated with the screw of the upper half body 11.
[0026] The function of the driving mechanism is to save the step of manually pulling the annular extrusion piece and reduce the labor intensity of the construction workers.
[0027] like Figure 4 As shown, Example 4: The difference between this embodiment and embodiment 2 is that: it also includes an inverted U-shaped wind shield 21, and the wind shield 21 is detachably connected to the two positioning frames 8; the coverage area of the wind shield 21 is used to shield the extruded heat shrink tube 2 from top to bottom.
[0028] The wind shield 21 can reduce the heat loss of the annular heating chamber 3, the screw extruder 5 and the heat shrink tube 2, reduce power consumption, and ensure that the heat shrink tube 2 has sufficient time to shrink.
[0029] A further optimized embodiment is an auxiliary device for anti-corrosion heat shrink tubing of oil and gas pipelines, wherein the inverted U-shaped windshield 21 is made of a transparent material.
[0030] The windshield 21 made of transparent material is helpful for construction workers to observe the extrusion and shrinkage of the heat shrink tube 2 and adjust the moving speed of the annular extrusion piece 1 and the discharge speed of the screw extruder 5 in time.
[0031] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0032] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.
Claims
1. An auxiliary device for anti-corrosion heat shrink tube of oil and gas pipeline, characterized in that: include: An annular extrusion piece, the annular extrusion piece is configured to surround the outside of the oil and gas pipeline and extrude a heat shrink tube; an annular heating chamber is provided inside the annular extrusion piece; the annular heating chamber is provided with an annular extrusion port that is in communication with the outside; Screw extruder; the upper end discharge port of the screw extruder is connected to the annular heating chamber; the lower feed port of the screw extruder is connected to the raw material hopper; Slide rail bracket; the slide rail bracket includes two positioning brackets and a guide slide rail connected between the two positioning brackets; each positioning bracket is detachably connected to the oil and gas pipeline; The annular extrusion piece is divided into two halves in the vertical direction, and the two halves are detachably connected; the upper half is slidably matched with the guide rail in the horizontal direction; and the lower half is fixedly connected to the screw extruder.
2. The oil and gas pipeline anti-corrosion heat shrink tube auxiliary device according to claim 1 is characterized in that : It also includes an adhesive spraying mechanism; the adhesive spraying mechanism is located on the side of the annular extrusion piece away from the annular extrusion port and is fixedly connected to the upper half; the adhesive spraying mechanism includes a C-shaped flexible conduit, and the oil and gas pipeline can pass through the inner circle of the flexible conduit through the deformation of the opening of the flexible conduit; a plurality of nozzles are distributed on the inner side of the flexible conduit; the plurality of nozzles are used to spray and cover the outer surface of the oil and gas pipeline with adhesive; the flexible conduit is connected to a conduit for supplying adhesive; the other end of the conduit is connected to an external adhesive pumping device.
3. The oil and gas pipeline anti-corrosion heat shrink tube auxiliary device according to claim 2 is characterized by: It also includes a clamping mechanism; the clamping mechanism is located on the side of the annular extrusion piece facing the annular extrusion port and is fixedly connected to the upper half; the clamping mechanism includes a C-shaped flexible bracket, and the oil and gas pipeline can pass through the inner circle of the flexible bracket through the deformation of the opening of the flexible bracket; a clamping brush is installed on the inner side of the flexible bracket; the inner diameter of the clamping brush is smaller than the outer diameter of the oil and gas pipeline.
4. The oil and gas pipeline anti-corrosion heat shrink tube auxiliary device according to claim 1 is characterized in that : Also includes a driving mechanism; the driving mechanism includes a transmission screw installed between two positioning frames and a driving motor installed on one side of the positioning frame; the power output end of the driving motor is coupled with the transmission screw, and the transmission screw is matched with the upper half screw.
5. The oil and gas pipeline anti-corrosion heat shrink tube auxiliary device according to claim 4 is characterized in that : It also includes an inverted U-shaped windshield, which is detachably connected to two positioning frames; the coverage of the windshield is used to shield the extruded heat shrink tube from top to bottom.
6. The oil and gas pipeline joint anti-corrosion pipe auxiliary device according to claim 1 is characterized in that The inverted U-shaped windshield is made of transparent material.