Coating device and coating method for heat insulation material of heat insulation pipe

Abstract

The invention discloses a coating device and method for a heat insulation material of a heat insulation pipe, and belongs to the technical field of heat insulation pipe machining. Comprising a conveying mechanism used for achieving axial movement of a pipe, a heat insulation material synchronously moves along with the pipe, a furling roller set is arranged on the axial running path of the pipe, and a plurality of guide rollers used for enabling the heat insulation material to gradually wrap the surface of the pipe are arranged in the furling roller set. And a binding mechanism for fixing the pipe coated with the heat insulation material is also arranged at the outlet of the furling roller group. According to the coating device and the coating method for the heat insulation material of the heat insulation pipe, firstly, the action mode of the pipe in the prior art when the heat insulation material is arranged on the surface of the pipe is changed through the conveying device, and the heat insulation material is gradually coated on the surface of the pipe in the axial movement process of the pipe by utilizing the furling roller group; and finally, wrapping is conducted through the wrapping mechanism, and the defects that in a traditional wrapping mode, the heat insulation materials are loosened and broken due to deformation of the pipes are overcome.

Description

Technical Field

[0001] The invention relates to the technical field of heat insulation pipe processing, and in particular to a coating device and a coating method for heat insulation materials of a heat insulation pipe. Background Art

[0002] Insulated pipes are one of the important materials for the exploitation and transportation of oil, geothermal energy, etc. Insulated pipes are made after the pipe production is completed, and then the outside of the inner pipe is processed again to wrap the insulation material on the outside of the pipe. Therefore, the secondary coating of the insulation material on the surface of the pipe makes the insulation material reliably coated on the outer wall of the pipe, which plays an important role in the entire production process of the insulated pipe. In the prior art, for the coating of the surface material of the insulated pipe, the commonly used method is to lift up the two ends of the pipe and let the whole pipe hang in the air, and then further drive the pipe to rotate by the lifting devices at both ends, and then multiple windings run along the axial direction of the pipe to wrap the windings to the outer wall of the steel pipe. The existing coating method has the following defects: (1) Since the pipe is long (usually about 10 meters), after lifting the two ends of the pipe, the middle of the pipe will bend due to its own weight. The thermal insulation material has poor toughness and is easy to break. Therefore, after the thermal insulation material is wrapped, when the deformation of the pipe is restored, it is easy to cause the thermal insulation material to loosen and break. Therefore, when arranging the thermal insulation material, its tightness is difficult to control, making it difficult for the thermal insulation material to fit the surface of the pipe, greatly reducing the thermal insulation effect.

[0003] (2) Thermal insulation materials are generally composed of multiple layers, such as aluminum foil, aerogel felt, glass fiber cloth / paper, etc. Since the pipe is long, it is difficult to ensure the consistency of the overlap of each layer during wrapping. As the wrapping progresses, the possibility of deviation between each layer of material will gradually increase, and the speed of the steel pipe rotation and the travel of the wrapping material cannot be automatically calculated, resulting in a low degree of automation.

[0004] (3) Since the pipe is long, the equipment for lifting and rotating both ends of the pipe also has the problems of large floor space, heavy weight and high cost. Summary of the invention

[0005] The technical problem to be solved by the present invention is: to overcome the shortcomings of the prior art and provide a device and method for wrapping the thermal insulation material of the thermal insulation pipe, which changes the movement mode of the pipe itself when the thermal insulation material is arranged on the surface of the pipe in the prior art, and gradually wraps the thermal insulation material on the surface of the pipe by a gathering roller group during the axial movement of the pipe, and finally wraps it by a wrapping mechanism, thereby avoiding the disadvantages of loosening, breaking and other problems of the thermal insulation material due to the deformation of the pipe itself under the traditional wrapping method.

[0006] The technical solution adopted by the present invention to solve its technical problems is: the insulating material coating device of the insulating pipe includes insulating material coated on the surface of the pipe, the insulating material includes at least one reflective layer and at least one insulating layer, and is characterized in that it includes a conveying mechanism for realizing axial movement of the pipe, the insulating material moves synchronously with the pipe, a gathering roller group is arranged on the axial running path of the pipe, and a plurality of guide rollers are arranged in the gathering roller group for realizing that the insulating material is gradually coated on the surface of the pipe, and a wrapping mechanism for fixing the pipe coated with the insulating material is also arranged at the outlet of the gathering roller group.

[0007] Preferably, the conveying mechanism comprises an input device and an output device for conveying the pipe respectively, the input device and the output device are respectively located at the input end and the output end of the wrapping mechanism, and the gathering roller group is located between the input device and the wrapping mechanism.

[0008] Preferably, the gathering roller group includes a pre-bending roller group and a forming roller group which are sequentially arranged along the moving direction of the tube.

[0009] Preferably, the pre-bending roller group includes pre-bending side rollers and pre-bending bottom rollers arranged in sequence along the moving direction of the tube, and the forming roller group includes forming side rollers and forming bottom rollers arranged in sequence along the moving direction of the tube.

[0010] Preferably, the gathering roller group also includes a horizontal roller arranged at the front end of the pre-bending roller group.

[0011] Preferably, the pre-bending side roller and the forming side roller are arranged on at least one side of the pipe.

[0012] Preferably, the pre-bending bottom roller and the forming bottom roller are horizontally arranged at the lower part of the pipe, and the pre-bending side rollers and the forming side rollers are symmetrically arranged on both sides of the pipe.

[0013] Preferably, a heat insulation material support is provided at the entrance of the gathering roller group, and the rolled heat insulation material is movably installed in the heat insulation material support.

[0014] A method for coating a heat-insulating pipe with a heat-insulating material, characterized in that it comprises the following steps: Step a, the pipe moves to the wrapping mechanism under the drive of the conveying mechanism; Step b, stretching the thermal insulation material and passing it through a gathering roller set; Step c, starting the conveying mechanism, the pipe is driven to move by the conveying mechanism and the heat insulation material is driven to move synchronously and gradually pass through the gathering roller group, and the heat insulation material is covered on one side of the pipe or on both sides of the pipe at the same time after passing through the gathering roller group; Step d, starting the wrapping mechanism to wrap the outside of the pipe wrapped with the insulation material. The pipe is gradually wrapped to form an insulation inner pipe as it passes through the wrapping mechanism, and the insulation inner pipe is output by the conveying mechanism.

[0015] Preferably, when executing step d, when the thermal insulation material is wrapped around one side of the pipe, the wrapping mechanism wraps in a direction from the unwrapped side of the pipe to the wrapped side.

[0016] Compared with the prior art, the present invention has the following beneficial effects: Through the coating device and coating method of the heat-insulating material of the heat-insulating pipe, the action mode of the pipe itself when the heat-insulating material is arranged on the pipe surface in the prior art is first changed by the conveying device, and the heat-insulating material is gradually coated on the pipe surface by the gathering roller group during the axial movement of the pipe, and finally coated by the wrapping mechanism. Since the pipe does not need to be lifted up and suspended at both ends before the heat-insulating material is arranged, the disadvantages of the heat-insulating material being loosened or broken due to the deformation of the pipe itself in the traditional coating method are avoided.

[0017] Due to the movement mode of the pipe itself when the heat insulating material is arranged on the surface of the pipe in the prior art, the pipe is changed from self-rotation to axial movement achieved by the existing conveying mechanism, thereby reducing the cost.

[0018] In the device and method for coating the thermal insulation material of the thermal insulation pipe, multiple guide rollers in the gathering roller group are used to gradually coat the surface of the pipe with the thermal insulation material moving axially along the pipe, thereby improving the degree of automation.

[0019] By using the coating device and coating method of the thermal insulation material of the thermal insulation pipe, the multi-layer structure is fixed as a whole by physical fixing, thereby avoiding the problem of deviation between the layers when arranging them layer by layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the coating device for the insulation material of the insulation pipe.

[0021] Figure 2 A schematic diagram of the arrangement of the gathering roller group of the insulation material covering device for the insulation pipe.

[0022] Figure 3 Schematic diagram of the relative positions of the gathering roller set and the pipe in Example 1.

[0023] Figure 4 Schematic diagram of the relative positions of the horizontal rollers of the furling roller group and the pipe in Example 1.

[0024] Figure 5 Schematic diagram of the relative positions of the pre-bent bottom roller and the pipe of the gathering roller group in Example 1.

[0025] Figure 6 Schematic diagram of the relative positions of the pre-bent side rollers of the gathering roller group and the pipe in Example 1.

[0026] Figure 7 Schematic diagram of the relative positions of the forming bottom roller of the gathering roller group and the pipe in Example 1.

[0027] Figure 8 Schematic diagram of the relative positions of the forming side rollers of the gathering roller group and the pipe in Example 1.

[0028] Fig. 9 Schematic diagram of the thermal insulation material folding process in Example 1.

[0029] Fig.10 This is a schematic diagram of the relative positions of the gathering roller set and the pipe in Example 2.

[0030] Fig.11 Schematic diagram of the relative positions of the pre-bent side rollers of the gathering roller group and the pipe in Example 2.

[0031] Fig.12 Schematic diagram of the relative positions of the forming side rollers of the gathering roller group and the pipe in Example 2.

[0032] Fig.13 Schematic diagram of the thermal insulation material folding process in Example 2.

[0033] Among them: 1. output device; 2. wrapping belt; 3. winding machine; 4. thermal insulation material; 5. gathering roller group; 6. thermal insulation material bracket; 7. pipe; 8. input device; 9. forming side roller; 10. forming bottom roller; 11. pre-bent side roller; 12. pre-bent bottom roller; 13. horizontal roller; 14. roller bracket. DETAILED DESCRIPTION

[0034] Figures 1 to 9 The best embodiment of the present invention is shown below in conjunction with the attached Figures 1 to 13 The present invention is further described.

[0035] Embodiment 1: like Figure 1 As shown, a coating device for insulating pipe insulation materials includes an input device 8 and an output device 1. The input device 8 and the output device 1 are implemented by a conveying mechanism known in the art, such as the technical solution recorded in the Chinese utility model patent with application number 202420737813.8, application date April 10, 2024, and patent name “A welding pipe conveying mechanism”. Its specific implementation method will not be repeated here. A wrapping machine 3 is also provided at the entrance of the output device 1, and the wrapping tape 2 is wrapped around the outside of the pipe 7 by the wrapping machine 3. The wrapping machine 3 can also be implemented by a solution known in the art, such as the technical solution recorded in the Chinese invention patent with application number 202410719848.3, application date June 4, 2024, and patent name “A high-stability pipe packaging machine”. Its specific implementation method will not be repeated here.

[0036] The input device 8 is spaced apart from the winding machine 3, and a heat insulating material support 6 is provided at the bottom of the output end of the input device 8, and a roller is rotatably mounted on the heat insulating material support 6, on which the heat insulating material 4 is wound. The heat insulating material 4 is a layered structure, and the specific number of layers of the heat insulating material 4 and the specific material of each layer are set according to actual process requirements, such as including at least one reflective layer (such as aluminum foil) that reflects heat, and at least one heat insulating layer (such as aerogel felt) that insulates heat.

[0037] Different from the prior art, in the present application, after all the layered structures constituting the heat insulating material 4 are arranged in an up-down order, they are fixed together by common means. To avoid damage to the heat insulating material 4, the heat insulating material 4 is preferably fixed together by physical means, such as sewing, rather than chemical means, such as gluing. The length of the finally formed heat insulating material 4 is about 200 mm shorter than the length of the tube 7, and its width is the same as the outer circumference of the tube 7.

[0038] A gathering roller group 5 is arranged between the heat insulation material support 6 and the wrapping machine 3. The heat insulation material 4 is released from the roller on which it is wrapped and stretched to extend into the gathering roller group 5. The heat insulation material 4 moves forward with the pipe 7 in the gathering roller group 5. In the process of moving forward with the pipe 7, the heat insulation material 4 gradually fits and wraps around the outside of the pipe 7 under the guidance and gathering action of the gathering roller group 5. The heat insulation material 4 wraps around the pipe 7 before entering the wrapping machine 3, and after passing through the wrapping machine 3, the wrapping belt 2 released from the wrapping machine 3 wraps around the pipe 7, and at the same time, the heat insulation material 4 is wrapped and fixed on the surface of the pipe 7.

[0039] like Figure 2~3 As shown, the gathering roller group 5 includes a plurality of rollers arranged in sequence from the input device 8 to the winding machine 3: a horizontal roller 13, a pre-bent bottom roller 12, a pre-bent side roller 11, a formed bottom roller 10 and a formed side roller 9, and the horizontal roller 13, the pre-bent bottom roller 12, the pre-bent side roller 11, the formed bottom roller 10 and the formed side roller 9 are all arranged vertically through corresponding roller brackets 14. The pre-bent bottom roller 12, the pre-bent side roller 11, the formed bottom roller 10 and the formed side roller 9 are all U-shaped rollers with "U"-shaped grooves in the middle, and the horizontal roller 13 is a cylindrical roller.

[0040] Combination Figures 4 to 8 After being released from the insulation material support 6, the insulation material 4 first extends to the horizontal roller 13, which is located at the bottom of the pipe 7 and is spaced apart from the pipe 7. The insulation material 4 is first adjusted to a horizontal state by the horizontal roller 13. After passing through the horizontal roller 13, the insulation material 4 extends to the pre-bent bottom roller 12, which is also located at the bottom of the pipe 7 and is spaced apart from the pipe 7. The insulation material 4 forms an arc structure at the bottom under the action of the grooves on the surface of the pre-bent bottom roller 12.

[0041] After passing through the pre-bending bottom roller 12, the heat insulating material 4 extends to the pre-bending side roller 11. Two pre-bending side rollers 11 are provided and are symmetrically located on both sides of the tube 7. The two pre-bending side rollers 11 are inclined. The heat insulating material 4 passes through the gap between the pre-bending side rollers 11 and the tube 7, and contacts the pre-bending side rollers 11 and the tube 7 at the same time. The pre-bending side rollers 11 further fit the heat insulating material 4 to the tube 7.

[0042] After passing through the pre-bending side roller 11, the heat insulating material 4 extends to the forming bottom roller 10. The forming bottom roller 10 is located at the bottom of the pipe 7. The heat insulating material 4 passes through the gap between the forming bottom roller 10 and the pipe 7, and contacts the forming bottom roller 10 and the pipe 7 at the same time. The two ends of the groove on the surface of the forming bottom roller 10 extend to the axis of the pipe 7 and extend upward appropriately. When the heat insulating material 4 passes through the forming bottom roller 10, 1 / 2 of the lower part of the pipe 7 is covered by the heat insulating material 4. After passing through the forming bottom roller 10, the heat insulating material 4 extends to the forming side roller 9. There are two forming side rollers 9, which are horizontally symmetrically located on both sides of the pipe 7. The heat insulating material 4 passes through the gap between the forming side roller 9 and the pipe 7, and contacts the forming side roller 9 and the pipe 7 at the same time. After the grooves on the surfaces of the forming side rollers 9 on both sides are connected, they are located on both sides of the pipe 7. Under the action of the forming side rollers 9 on both sides, the heat insulating material 4 is completely covered on the outside of the pipe 7.

[0043] The heat insulating material 4 is deformed in the process of passing through the horizontal roller 13, the pre-bent bottom roller 12, the pre-bent side roller 11, the forming bottom roller 10 and the forming side roller 9 in sequence. Fig. 9 After passing through the forming side roller 9 , the heat insulating material 4 enters the wrapping machine 3 , under the action of the wrapping machine 3 , the wrapping tape 2 is wrapped around the surface of the pipe 7 , and the heat insulating material 4 is fixed on the surface of the pipe 7 at the same time.

[0044] The specific working process and working principle are as follows: The coating method using the above-mentioned thermal insulation material coating device for thermal insulation pipe is as follows: Step 1, input of pipe 7; The pipe 7 is driven by the input device 8 to move forward and stops after reaching the winding machine 3 .

[0045] Step 2, stretching the thermal insulation material 4; After installing the rolled insulation material 4 and the insulation material support 6, the operator manually stretches the insulation material 4 so that the front end of the insulation material 4 and the port of the pipe 7 close to the winding machine 3 are about 100 mm backward. After passing through the gathering roller group 5, the insulation material 4 at least contacts the forming side roller 9, the forming bottom roller 10 and the pre-bending side roller 11 in the gathering roller group 5.

[0046] Step 3, the coating process of the tube 7 is started; Start the input device 8 and the output device 1. Driven by the input device 8 and the output device 1, the tube 7 gradually moves toward the winding machine 3. At this time, since the thermal insulation material 4 is in contact with at least the forming side roller 9, the forming bottom roller 10 and the pre-bending side roller 11 in the gathering roller group 5, the tube 7 will squeeze the thermal insulation material 4 and form a sufficiently large friction force between the tube 7 and the thermal insulation material 4 and between the thermal insulation material 4 and the rollers (forming side roller 9, forming bottom roller 10 and pre-bending side roller 11) in the gathering roller group 5, so that the tube 7 drives the thermal insulation material 4 to move forward synchronously while moving axially.

[0047] Step 4, the gathering roller group 5 performs the gathering action.

[0048] As the pipe 7 continues to move forward, the heat insulating material 4 is gradually wrapped around the surface of the pipe 7 driven by the rollers in the gathering roller set 5 .

[0049] Step 5, the winding process of the winding machine 3.

[0050] When the pipe 7 moves forward to the wrapping machine 3, the wrapping machine 3 is turned on. When the pipe 7 that has been coated passes through the wrapping machine 3, the wrapping tape 2 is wrapped around the surface of the pipe 7 under the action of the wrapping machine 3, and the insulation material 4 is fixed on the surface of the pipe 7 at the same time.

[0051] Step 6, output of the pipe 7.

[0052] As the tube 7 is gradually wound through the wrapping machine 3 , the wound tube 7 contacts the output device 1 and is output driven by the output device 1 . When the tube 7 is output from the wrapping machine 3 as a whole, the coating of the tube 7 is completed.

[0053] Embodiment 2: The difference between this embodiment and the first embodiment is that in the gathering roller group 5, the forming side roller 9 and the pre-bending side roller 11 are arranged differently. Figures 10-12 As shown, in this embodiment, only one forming side roller 9 and one pre-bending side roller 11 are provided, that is, after the thermal insulation material 4 passes through the gathering roller group 5, the gathering roller group 5 only covers one side of the pipe 7 with the thermal insulation material 4.

[0054] In the subsequent winding process, it is necessary to set a winding method: the wrapping tape 2 is wound from the unwrapped side to the completed wrapped side. Therefore, during the winding process, the wrapping tape 2 wraps the unwrapped side of the thermal insulation material 4 at the same time, and then wraps the entire pipe 7. Fig.13 shown.

[0055] The above is only a preferred embodiment of the present invention, and does not limit the present invention in other forms. Any technician familiar with the profession may use the above disclosed technical content to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention without departing from the technical solution of the present invention still belongs to the protection scope of the technical solution of the present invention.

Claims

1. A device for coating a heat-insulating pipe with a heat-insulating material, comprising a heat-insulating material (4) coated on a surface of a pipe (7), the heat-insulating material (4) comprising at least one reflective layer and at least one heat-insulating layer, characterized in that: The invention comprises a conveying mechanism for realizing axial movement of a pipe (7), wherein a heat insulating material (4) moves synchronously with the pipe (7), a gathering roller group (5) is arranged on the path of axial movement of the pipe (7), a plurality of guide rollers are arranged in the gathering roller group (5) for realizing that the heat insulating material (4) is gradually wrapped around the surface of the pipe (7), and a wrapping mechanism for fixing the pipe (7) wrapped with the heat insulating material (4) is also arranged at the outlet of the gathering roller group (5).

2. The device for covering the heat-insulating material of the heat-insulating pipe according to claim 1, characterized in that: The conveying mechanism comprises an input device (8) and an output device (1) for conveying the pipe (7), respectively; the input device (8) and the output device (1) are respectively located at the input end and the output end of the wrapping mechanism, and the gathering roller group (5) is located between the input device (8) and the wrapping mechanism.

3. The coating device of the heat insulation material for the heat insulation pipe according to claim 1 or 2, characterized in that: The gathering roller group (5) comprises a pre-bending roller group and a forming roller group which are arranged in sequence along the moving direction of the pipe (7).

4. The device for covering the heat-insulating material of the heat-insulating pipe according to claim 3, characterized in that: The pre-bending roller group comprises pre-bending side rollers (11) and pre-bending bottom rollers (12) arranged in sequence along the moving direction of the tube (7), and the forming roller group comprises forming side rollers (9) and forming bottom rollers (10) arranged in sequence along the moving direction of the tube (7).

5. The device for covering the heat-insulating material of the heat-insulating pipe according to claim 3, characterized in that: The gathering roller group (5) also includes a horizontal support roller (13) arranged at the front end of the pre-bending roller group.

6. The device for covering the heat-insulating material of the heat-insulating pipe according to claim 4, characterized in that: The pre-bending side roller (11) and the forming side roller (9) are arranged on at least one side of the tube (7).

7. The device for covering the heat-insulating material of the heat-insulating pipe according to claim 6, characterized in that: The pre-bending bottom roller (12) and the forming bottom roller (10) are horizontally arranged at the bottom of the pipe (7), and the pre-bending side rollers (11) and the forming side rollers (9) are symmetrically arranged on both sides of the pipe (7).

8. The device for covering the heat-insulating material of the heat-insulating pipe according to claim 1, characterized in that: A heat insulation material support (6) is provided at the entrance of the gathering roller group (5), and the rolled heat insulation material (4) is movably mounted in the heat insulation material support (6).

9. A coating method using the coating device of the thermal insulation material for thermal insulation pipe according to any one of claims 1 to 8, characterized in that: The steps include: Step a, the pipe (7) moves to the wrapping mechanism under the drive of the conveying mechanism; Step b, stretching the heat insulating material (4) and passing it through a gathering roller set (5); Step c, starting the conveying mechanism, the pipe (7) is driven to move by the conveying mechanism and at the same time drives the heat insulating material (4) to move synchronously and gradually pass through the gathering roller group (5), and the heat insulating material (4) is wrapped around one side of the pipe (7) or both sides of the pipe (7) at the same time after passing through the gathering roller group (5); Step d, starting the wrapping mechanism to wrap the outside of the pipe (7) wrapped with the heat insulating material (4), the pipe (7) is gradually wrapped to form an insulated pipe as it passes through the wrapping mechanism, and the insulated pipe is output by the conveying mechanism.

10. The method for coating a heat-insulating pipe with a heat-insulating material according to claim 9, characterized in that: When executing step d, when the heat insulating material (4) is wrapped around one side of the tube (7), the wrapping mechanism wraps in a direction from the unwrapped side of the tube (7) to the wrapped side.

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