Internal plastic-coated pipeline connecting component

Abstract

The invention relates to the technical field of offshore oil engineering, in particular to an internal plastic-coated pipeline connecting component which comprises a base body, the base body is a pipe section with the same wall thickness as a connecting pipeline, and a part of the inner wall of the pipe section is provided with a 3mm nickel-based alloy surfacing layer and extends to the other end of the pipe section. A clamping mechanism used for clamping the base body for welding is installed on the outer wall of the base body, an inner plastic-coated pipeline connecting component is arranged, and one end, without a 3mm nickel base alloy layer, of the component is welded with a single pipe to be subjected to plastic coating in a prefabrication stage, which means that the welding work can be carried out in a more stable and controllable environment, so that the welding quality is improved, and the production efficiency is improved. The end, without the 3mm nickel-based alloy layer, of the component is welded with the single pipe to be coated with plastic in the prefabrication stage, which means that the welding work can be carried out in a more stable and controllable environment, so that the welding quality is improved.

Description

Technical Field

[0001] The invention relates to the technical field of offshore petroleum engineering, in particular to an inner plastic-coated pipeline connecting component. Background Art

[0002] Internally coated plastic pipeline is the abbreviation of epoxy powder internal coating pipeline (hereinafter referred to as internally coated plastic pipeline). It has good corrosion resistance and can be used for the transportation of media such as oil and natural gas. It is widely used in the field of offshore oil engineering.

[0003] Due to the limitation of the current internal plastic coating capacity, the internal plastic coated pipeline is generally controlled at about 12 meters in one direction. The internal plastic coated pipeline is currently usually connected by flange connection. The advantage of using flange connection is that the length of a single pipe can be controlled more conveniently, but the disadvantages are also obvious. The first is that the flange is used in large quantities, especially for large diameter pipelines. The cost of the matching flange is high, which leads to the high overall cost of the plastic coated pipeline. Second, the internal plastic coating technology at the flange connection is extremely high. The internal plastic coating at the flange connection is easy to fall off during the operation of the project, and the cost of repairing it is also high. In view of this, an internal plastic coated pipeline connection component is provided. Summary of the invention

[0004] The main purpose of the present invention is to provide an inner plastic-coated pipeline connecting component to solve the problem raised in the related art that due to the limitation of the current inner plastic coating capacity, the inner plastic-coated pipeline is generally controlled to be about 12 meters in one direction. The inner plastic-coated pipeline connection is currently usually connected by flange connection. The advantage of using flange connection is that the length of a single pipe can be controlled more conveniently, but the disadvantages are also obvious. The first is that the flange is used in large quantities, especially for large-diameter pipelines. The cost of the matching flange is high, which leads to the high overall cost of the plastic-coated pipeline. Second, the inner plastic coating technology at the flange connection is extremely high. The inner plastic coating at the flange connection is easy to fall off during the project operation, and the cost of repairing it is also high.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, there is provided an inner plastic-coated pipeline connecting component, comprising a substrate, wherein the substrate is a pipe section with the same wall thickness as the connecting pipeline, a partial 3mm nickel-based alloy cladding layer exists on the inner wall of part of the pipe section and extends to the other end of the pipe section, and a clamping mechanism for clamping the substrate for welding is installed on the outer wall of the substrate.

[0006] Furthermore, the 3 mm nickel-based alloy cladding layer has a slope at a certain angle at one end away from the pipe end to ensure the overlap of the plastic coating layer and the nickel-based layer. This component is used in pairs.

[0007] Furthermore, the end without the 3mm nickel-based alloy cladding layer is normally welded to the single pipe to be coated in the prefabrication stage, which is a prefabricated weld, and can be prefabricated in advance and transported to the internal plastic coating manufacturer for internal plastic coating. The 3mm nickel-based alloy cladding end is welded to the 3mm nickel-based alloy end of another paired component, which is an on-site weld, and can be welded when the pipeline is assembled.

[0008] Furthermore, the clamping mechanism includes a first clamping block arranged on the outer wall of the base body, a second clamping block is arranged on the outer wall of the base body, the second clamping block is slidably connected to the first clamping block, the inner sides of the first clamping block and the second clamping block are symmetrically provided with grooves, the grooves are symmetrically fixed with sliding rods, the outer wall of the sliding rod is slidably connected with a sliding bar, the inner side of the sliding bar is threadedly connected with a driving rod, the end of the driving rod close to the base body is provided with a clamping bar, and the end of the driving rod away from the clamping bar is fixed with a bolt.

[0009] Furthermore, protrusions are fixed on the upper and lower ends of the first clamping block, and sliding grooves are fixed on the upper and lower ends of the second clamping block. The inner side of the sliding groove is slidably connected to the outer wall of the protrusion, and a limiting component for limiting the sliding of the first clamping block is installed on the outer wall of the second clamping block.

[0010] Furthermore, an anti-skid pad is fixed to one side of the four clamping strips close to the base body, and the outer wall of the anti-skid pad is in compression contact with the outer wall of the base body.

[0011] Furthermore, the limiting assembly includes a limiting hole symmetrically opened on the outer wall of the second clamping block, the outer wall of the protrusion is provided with a locking hole, and the inner side of the limiting hole is slidably connected with a locking strip and is engaged with the locking hole.

[0012] Furthermore, a handle is fixed to one end of the locking strip away from the protrusion, a spring is fixed to the inner side of the limiting hole, the spring is sleeved on the outer wall of the locking strip, and the elastic end of the spring is fixed to the outer wall of the locking strip.

[0013] Furthermore, a protective pad is fixed on one side of the first clamping block and the second clamping block that are close to each other, and the protective pad is in compression contact with the outer wall of the base body to protect the base body from being deformed by force during the clamping process.

[0014] Furthermore, the outer walls of the bolt and the handle are both provided with anti-slip grooves.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. In this kind of inner plastic-coated pipeline connecting component, an inner plastic-coated pipeline connecting component is provided, and one end of the component without a 3mm nickel-based alloy layer is welded to the single pipe to be plastic-coated in the prefabrication stage, which means that this part of the welding work can be carried out in a more stable and controlled environment, thereby improving the welding quality. One end of the component without a 3mm nickel-based alloy layer is welded to the single pipe to be plastic-coated in the prefabrication stage, which means that this part of the welding work can be carried out in a more stable and controlled environment, thereby improving the welding quality.

[0016] 2. In this plastic-coated pipeline connection component, a clamping mechanism is provided to adjust the distance between the clamping blocks according to the needs of welding, and more accurately control the position and clamping force of the pipeline, thereby improving the welding accuracy and being able to adapt to substrates of different diameters, thereby improving its versatility and flexibility, and reducing welding quality problems caused by loose pipelines or unstable clamping. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 It is a schematic diagram of the overall structure in a preferred embodiment of the present invention; Figure 2 It is a schematic diagram of the weld structure between the component and the inner plastic-coated pipeline in the preferred embodiment of the present invention; Figure 3 In the preferred embodiment of the present invention Figure 2 Sectional view at B in the middle; Figure 4 This is a schematic diagram of a 3 mm nickel-based layer inside a connecting member in a preferred embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the inner plastic coating layer in a preferred embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of the welding joint of the nickel-based sections of two components in a preferred embodiment of the present invention; Figure 7 In the preferred embodiment of the present invention Figure 6 The enlarged view of point A in the middle; Figure 8 It is a structural schematic diagram of a clamping mechanism in a preferred embodiment of the present invention; Fig. 9 It is a structural schematic diagram of a sliding rod in a preferred embodiment of the present invention; Fig.10 It is a schematic diagram of the structure of the clamping strip in a preferred embodiment of the present invention.

[0017] Illustration Description: 1. Base; 2. Connecting component at the end of the inner plastic-coated pipeline; 3. 3mm nickel-based layer inside the connecting component; 4. Welding joints of the nickel-based sections of the two components; 5. Welding joints between the component and the inner plastic-coated pipeline; 6. Overlap between the 3mm nickel-based layer inside the connecting component and the inner plastic coating; 7. Inner plastic coating layer; 8. Another end connecting component; 9. Clamping mechanism; 101. First clamping block; 102. Second clamping block; 103. Groove; 104. Sliding rod; 105. Sliding bar; 106. Driving rod; 107. Clamping bar; 108. Bolt; 10. Bump; 11. Slide groove; 12. Limiting assembly; 201. Limiting hole; 202. Locking hole; 203. Locking bar; 13. Handle; 14. Spring; 15. Anti-slip pad; 16. Protective pad. DETAILED DESCRIPTION

[0018] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0019] See also Figure 1-Figure 10 As shown, the purpose of this embodiment is to provide an inner plastic-coated pipeline connecting component, including a base 1, wherein the base 1 is a pipe section with the same wall thickness as the connecting pipeline material, a partial 3mm nickel-based alloy surfacing layer exists on the inner wall of part of the pipe section and extends to the other end of the pipe section, and the outer wall of the base 1 is installed with a clamping mechanism 9 for clamping the base 1 for welding.

[0020] In order to enable the plastic coating layer and the nickel base layer to form a closer contact when overlapping and reduce the gap caused by unevenness, the 3mm nickel-based alloy cladding layer has a slope at a certain angle at one end away from the pipe end to ensure the overlapping of the plastic coating layer and the nickel base layer. This component is used in pairs.

[0021] In order to better control welding deformation, the end without the 3mm nickel-based alloy cladding layer is normally welded to the single pipe to be coated during the prefabrication stage, which is a prefabricated weld. It can be prefabricated in advance and transported to the internal plastic coating manufacturer for internal plastic coating. The 3mm nickel-based alloy cladding end is welded to the 3mm nickel-based alloy end of another paired component, which is an on-site weld and can be welded when the pipeline is assembled.

[0022] In order to improve the clamping stability and accuracy, the clamping mechanism 9 includes a first clamping block 101 arranged on the outer wall of the base 1, and the outer wall of the base 1 is provided with a second clamping block 102, the second clamping block 102 is slidably connected to the first clamping block 101, the inner sides of the first clamping block 101 and the second clamping block 102 are symmetrically provided with grooves 103, and the grooves 103 are symmetrically fixed with sliding rods 104, the outer wall of the sliding rod 104 is slidably connected with a sliding bar 105, the inner side of the sliding bar 105 is threadedly connected with a driving rod 106, and the end of the driving rod 106 close to the base 1 is provided with a clamping bar 107, and the end of the driving rod 106 away from the clamping bar 107 is fixed with a bolt 108.

[0023] In order to enhance the flexibility and adaptability of clamping, a protrusion 10 is fixed to the upper and lower ends of the first clamping block 101, and a slide groove 11 is fixed to the upper and lower ends of the second clamping block 102. The inner side of the slide groove 11 is slidably connected to the outer wall of the protrusion 10, and a limiting component 12 is installed on the outer wall of the second clamping block 102 for limiting the sliding of the first clamping block 101.

[0024] In order to protect the substrate 1 and the pipeline surface, an anti-skid pad 15 is fixed to one side of the four clamping strips 107 close to the substrate 1 , and the outer wall of the anti-skid pad 15 is in compression contact with the outer wall of the substrate 1 .

[0025] In order to enhance the convenience of operation, the limiting component 12 includes a limiting hole 201 symmetrically opened on the outer wall of the second clamping block 102, and the outer wall of the protrusion 10 is provided with a locking hole 202. The inner side of the limiting hole 201 is slidably connected with a locking strip 203 and is engaged with the locking hole 202.

[0026] In order to improve the locking stability, a handle 13 is fixed to one end of the locking strip 203 away from the protrusion 10, and a spring 14 is fixed to the inner side of the limiting hole 201. The spring 14 is sleeved on the outer wall of the locking strip 203, and the elastic end of the spring 14 is fixed to the outer wall of the locking strip 203.

[0027] In order to reduce wear and damage, a protective pad 16 is fixed on the side where the first clamping block 101 and the second clamping block 102 are close to each other. The protective pad 16 is in compression contact with the outer wall of the base 1 to protect the base 1 from deformation during the clamping process.

[0028] In order to improve the holding stability, the bolt 108 and the outer wall of the handle 13 are both provided with anti-slip grooves.

[0029] When the present invention is used in practice, two connecting components are arranged at the place where the inner plastic-coated pipeline needs to be disconnected. The base 1 of the connecting component is consistent with the pipeline, but a 3mm nickel-based alloy layer is partially welded on one end. The length of the nickel-based alloy layer can be adjusted randomly, but the minimum length should be that when the nickel-based end weld is welded, the inner plastic coating is not damaged by heat. At the same time, the end of the 3mm nickel-based layer away from the port needs to be made into a suitable slope to achieve the effect of overlapping with the inner plastic coating. The connecting component and the pipeline that needs inner plastic coating are welded together through a prefabricated port, and then transported to the manufacturer of inner plastic coating for inner plastic coating. After the inner plastic coating is completed, it is welded together with another section of inner plastic-coated pipeline through the connecting component and another connecting component of another section of inner plastic-coated pipeline through the on-site port, and finally the purpose of pipeline connection is achieved. In this way, the entire inner wall of the pipeline is under the protection of the inner plastic coating and the 3mm nickel-based alloy layer; In addition, the substrate 1 needs to be clamped before welding. The first clamping block 101 needs to be placed on one side of the substrate 1, and then the second clamping block 102 is placed on the other side of the substrate 1, and then the handle 13 is pulled, and then the handle 13 drives the locking bar 203 to slide and squeeze the spring 14, and then the protrusion 10 is slid to the inside of the groove 103 to adjust the clamping angle, and then the handle 13 is released, and the elastic force of the spring 14 of the compression spring 14 drives the locking bar 203 to be clamped in the locking hole 202, and then the bolt 108 is turned to drive the driving rod 106 to rotate, and then the clamping distance is adjusted by toggling the sliding bar 105, and then the bolt 108 is turned to drive the driving rod 106 to rotate, and then the driving rod 106 drives the clamping block to slide, and then the clamping block drives the anti-slip pad 15 to slide until it contacts the outer wall of the substrate 1, and then the welding work is carried out.

[0030] The above are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Although the present invention has been disclosed as above in the form of preferred embodiments, it is not intended to limit the present invention. Any technical personnel in the field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An internally plastic-coated pipeline connection component, comprising a base body (1), wherein the base body (1) is a pipe section having the same wall thickness as the connecting pipeline, characterized in that: A partial 3 mm nickel-based alloy cladding layer is present on the inner wall of part of the pipe section and extends to the other end of the pipe section. A clamping mechanism (9) for clamping the base body (1) for welding is installed on the outer wall of the base body (1).

2. The inner plastic-coated pipeline connection component according to claim 1, characterized in that: The 3 mm nickel-based alloy cladding layer has a slope at a certain angle at one end away from the pipe end to ensure the overlap of the plastic coating layer and the nickel-based layer. This component is used in pairs.

3. The inner plastic-coated pipeline connection component according to claim 1, characterized in that: The end without the 3mm nickel-based alloy cladding layer is normally welded to the single pipe to be coated in the prefabrication stage, which is a prefabricated weld. It can be prefabricated in advance and transported to the internal plastic coating manufacturer for internal plastic coating. The 3mm nickel-based alloy cladding end is welded to the 3mm nickel-based alloy end of another paired component, which is an on-site weld and can be welded when the pipeline is assembled.

4. The inner plastic-coated pipeline connection component according to claim 1, characterized in that: The clamping mechanism (9) comprises a first clamping block (101) arranged on the outer wall of a base body (1); a second clamping block (102) is arranged on the outer wall of the base body (1); the second clamping block (102) is slidably connected to the first clamping block (101); grooves (103) are symmetrically provided on the inner sides of the first clamping block (101) and the second clamping block (102); sliding rods (104) are symmetrically fixed to the grooves (103); a sliding bar (105) is slidably connected to the outer wall of the sliding rod (104); a driving rod (106) is threadedly connected to the inner side of the sliding bar (105); a clamping bar (107) is arranged on one end of the driving rod (106) close to the base body (1); and a bolt (108) is fixed to one end of the driving rod (106) away from the clamping bar (107).

5. The inner plastic-coated pipeline connection component according to claim 4, characterized in that: The upper and lower ends of the first clamping block (101) are both fixed with protrusions (10), and the upper and lower ends of the second clamping block (102) are both fixed with sliding grooves (11), the inner side of the sliding groove (11) is slidably connected to the outer wall of the protrusion (10), and the outer wall of the second clamping block (102) is installed with a limiting component (12) for limiting the sliding of the first clamping block (101).

6. The inner plastic-coated pipeline connection component according to claim 4, characterized in that: An anti-skid pad (15) is fixed to one side of the four clamping strips (107) close to the base body (1), and the outer wall of the anti-skid pad (15) is in compression contact with the outer wall of the base body (1).

7. The inner plastic-coated pipeline connection component according to claim 5, characterized in that: The limiting assembly (12) comprises a limiting hole (201) symmetrically provided on the outer wall of the second clamping block (102); the outer wall of the protrusion (10) is provided with a locking hole (202); a locking strip (203) is slidably connected to the inner side of the limiting hole (201) and is engaged with the locking hole (202).

8. The inner plastic-coated pipeline connection component according to claim 7, characterized in that: A handle (13) is fixed to one end of the locking strip (203) away from the protrusion (10), a spring (14) is fixed to the inner side of the limiting hole (201), the spring (14) is sleeved on the outer wall of the locking strip (203), and the elastic end of the spring (14) is fixed to the outer wall of the locking strip (203).

9. The inner plastic-coated pipeline connection component according to claim 4, characterized in that: A protective pad (16) is fixed to one side of the first clamping block (101) and the second clamping block (102) that are close to each other, and the protective pad (16) is in compression contact with the outer wall of the base body (1) to protect the base body (1) from deformation due to force during the clamping process.

10. The inner plastic-coated pipeline connection component according to claim 4, characterized in that: The outer walls of the bolt (108) and the handle (13) are both provided with anti-slip grooves.

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