A method of sealingly connecting marine laid glass reinforced plastic pipe

Abstract

The application belongs to the field of glass steel pipeline and particularly relates to a marine laid glass steel pipeline and a sealing connection method thereof. The pipeline comprises a group of front pipeline bodies and rear pipeline bodies which are connected to each other by means of connecting mechanisms. The connecting mechanisms comprise limiting assemblies, female joints arranged at the rear ends of the front pipeline bodies and male joints arranged at the front ends of the rear pipeline bodies. The front pipeline bodies and the rear pipeline bodies are in plug-in cooperation by means of the male joints and the female joints. The limiting assemblies are arranged between the male joints and the female joints in plug-in cooperation and are used for fixing the male joints and the female joints. First glass fiber sheets are arranged on the front pipeline bodies and cover the outer walls of the female joints. The rear ends of the first glass fiber sheets are suspended rearward and are lapped on the rear pipeline bodies. Auxiliary glass fiber sheets are lapped with the rear ends of the first glass fiber sheets. The pipeline has good sealing performance, strong connection stability and a long service life.

Description

Technical Field

[0001] This invention belongs to the field of fiberglass pipes, specifically relating to a marine fiberglass pipe and its sealing connection method. Background Technology

[0002] Fiberglass reinforced plastic (FRP) pipes have become an important choice for marine pipeline laying projects due to their advantages such as lightweight and high strength. FRP pipes are typically connected using end-face bonding or flange connections. End-face bonding is simple to operate, but its curing is significantly affected by water, leading to defects such as porosity and cracks in the bonded joint, and the curing period is also long. Flange connections use bolts to connect two pipes with flanges, and a gasket is installed between the flanges to achieve a seal. However, the high pressure and high salinity of the marine environment can easily cause the gasket to age and deform, leading to seal failure and pipeline leaks. Summary of the Invention

[0003] To address the problems existing in the prior art, the present invention provides a method for laying fiberglass pipes in the ocean and sealing them together, which can improve the sealing performance and connection stability of fiberglass pipes and extend their service life in the ocean.

[0004] The specific technical solution adopted in this invention is as follows:

[0005] A marine fiberglass pipeline includes a front pipeline body and a rear pipeline body connected to each other by a connecting mechanism. The connecting mechanism includes a limiting component, a female connector located at the rear end of the front pipeline body, and a male connector located at the front end of the rear pipeline body. The front pipeline body and the rear pipeline body form an insertion fit with the male connector and the female connector. The limiting component is located between the male connector and the female connector and is used to fix the male connector and the female connector. The front pipeline body is provided with a first fiberglass sheet covering the outer wall of the female connector. The rear end of the first fiberglass sheet has a petal-like structure and extends rearward and overlaps the rear pipeline body. The rear pipeline body is also provided with an auxiliary fiberglass sheet that overlaps the rear end of the first fiberglass sheet.

[0006] The limiting component includes a protruding edge, a first collar, a second collar, and a groove disposed between the protruding edges. The protruding edges are arranged in a circumferential array on the inner wall of the female connector, and the rear end of the protruding edge is connected to the inner wall of the female connector by a chamfer transition. The first collar and the second collar are sequentially fitted onto the outer wall of the male connector from the outside to the inside. A set of spring pieces is spirally arranged on the first collar, and the overhanging end of the spring piece is inclined upward. A top post is fixed on the inner wall of the spring piece. The first collar and the second collar are provided with clearance holes for the spring piece and the top post. The protruding edge abuts against the outer wall of the spring piece to form a forward drive for the spring piece. The protruding edge abuts against the top post to form a top post alignment drive. The length of the top post is greater than the distance between the female connector and the male connector. The upper end of the top post is higher than the upper end of the spring piece, and the lower end of the top post is spaced apart from the root of the spring piece.

[0007] The male connector is also provided with a retaining ring with the same outer diameter as the female connector, and the rear end of the first glass fiber sheet extends backward and overlaps the retaining ring and the rear pipe body in sequence.

[0008] The rear pipe body is provided with a second glass fiber sheet, the male connector is sleeved on the second glass fiber sheet, and the rear end of the first glass fiber sheet overlaps with the second glass fiber sheet and is fixed by resin.

[0009] A sealing gasket is provided on the inner end face of the female connector, and the front end of the rear pipe body abuts against the sealing gasket.

[0010] A sealing connection method for laying fiberglass pipes in marine environments includes the following steps:

[0011] S1. On land, the front end of the first glass fiber sheet is fixed to the front pipe body with resin, and the rear end of the first glass fiber sheet is folded forward on the outside of the front pipe body.

[0012] S2. After entering the ocean, place the front pipe body and the rear pipe body in front and behind order, and fix the position of the front pipe body.

[0013] S3. Move the rear pipe body forward and rotate the rear pipe body in the spiral direction of the spring piece so that the male connector on the rear pipe body is inserted into the female connector on the front pipe body.

[0014] S4. After the retaining ring abuts against the female connector, the pipe body rotates in the opposite direction, and the convex edge abuts against the top column, driving the top column to be aligned until the upper end of the top column is inserted into the groove and the lower end abuts against the male connector. Then the pipe body stops and cannot continue to rotate.

[0015] S5. Fold the rear end of the first glass fiber sheet backward and overlap it on the retaining ring, and continue to extend backward and overlap it on the second glass fiber sheet of the rear pipe body.

[0016] S6. Fill the gap between the rear ends of the first glass fiber sheet with auxiliary glass fiber sheets, and brush resin onto the rear end of the first glass fiber sheet. Use a heating device to heat the first glass fiber sheet with the resin to promote resin solidification, thus completing the sealing connection between the front pipe body and the rear pipe body.

[0017] The beneficial effects of this invention are:

[0018] In this invention, the front pipe body and the rear pipe body are connected by a male connector and a female connector. A limiting component is disposed between the male connector and the female connector and is used to fix the male connector and the female connector to prevent displacement between the front pipe body and the rear pipe body.

[0019] The front pipe body is provided with a first glass fiber sheet covering the outer wall of the female connector. The rear end of the first glass fiber sheet has a petal-shaped structure. The rear end of the first glass fiber sheet extends backward and overlaps the rear pipe body, which improves the connection strength between the front pipe body and the rear pipe body. This pipe connection method is convenient to operate and has no sealing gasket that is in direct contact with seawater, making it suitable for marine environments and significantly improving its service life.

[0020] After the male connector is inserted into the female connector, the rear pipe body is reversed. During the reversal of the rear pipe body, the top post abuts against the convex edge, and the spring is pushed in the opposite direction and bends. As the spring bends, the top post gradually returns to a vertical position from an inclined state. As the rear pipe body continues to reverse, the root of the spring folds and deforms, while the upper end of the top post abuts against the inner wall of the groove, and the lower end of the top post sinks through the clearance hole and abuts against the outer wall of the male connector, correcting the coaxiality of the female and male connectors. The friction between the top post and the male connector and the limiting position of the groove lock the front and rear pipe bodies together, effectively preventing the rear pipe body from falling off.

[0021] An auxiliary fiberglass sheet is also laid on the rear pipe body, which overlaps with the rear end of the first fiberglass sheet, to fill the gap at the rear end of the first fiberglass sheet and further enhance the sealing and connection strength between the front and rear pipe bodies. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the present invention;

[0023] Figure 2 for Figure 1 Sectional view along axis AA;

[0024] Figure 3 for Figure 1 BB-direction sectional view;

[0025] Figure 4 A schematic diagram of the structure of the locking and limiting assembly between the front and rear pipe bodies in a locked state;

[0026] Figure 5 This is a schematic diagram of the structure of the rear pipeline body;

[0027] Figure 6 This is a schematic diagram of the front pipe body;

[0028] In the attached diagram, 1. Front pipe body, 2. Rear pipe body, 3. Limiting component, 4. Female connector, 5. Male connector, 6. First fiberglass sheet, 7. Auxiliary fiberglass sheet, 301. Protruding edge, 302. First collar, 303. Second collar, 304. Spring piece, 305. Top post, 306. Clearance hole, 307. Groove, 8. Retaining ring, 9. Sealing gasket, 10. Second fiberglass sheet. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0030] Specific implementation examples Figure 1 , Figure 2 As shown, this invention relates to a marine fiberglass pipeline, comprising a front pipeline body 1 and a rear pipeline body 2 interconnected by a connecting mechanism. The connecting mechanism includes a limiting component 3, a female connector 4 located at the rear end of the front pipeline body 1, and a male connector 5 located at the front end of the rear pipeline body 2. The front pipeline body 1 and the rear pipeline body 2 form an insertion fit through the male connector 5 and the female connector 4. The limiting component 3 is located between the insertion fit of the male connector 5 and the female connector 4 and is used to fix the male connector 5 and the female connector 4 to prevent displacement between the front pipeline body 1 and the rear pipeline body 2. A first fiberglass sheet covering the outer wall of the female connector 4 is provided on the front pipeline body 1. 6. The rear end of the first glass fiber sheet 6 has a petal-like structure. The rear end of the first glass fiber sheet 6 extends backward and overlaps with the rear pipe body 2, which improves the connection strength between the front pipe body 1 and the rear pipe body 2. An auxiliary glass fiber sheet 7 that overlaps with the rear end of the first glass fiber sheet 6 is also laid on the rear pipe body 2 to fill the gap at the rear end of the first glass fiber sheet 6, further enhancing the sealing and connection strength between the front pipe body 1 and the rear pipe body 2. This pipe connection method is firm and has no sealing gasket that is in direct contact with seawater. It can effectively resist the impact and erosion of seawater, adapt to the marine environment, and significantly improve its service life.

[0031] like Figure 3As shown, the limiting component 3 includes a protruding edge 301, a first collar 302, a second collar 303, and a groove 307 disposed between the protruding edges 301. The protruding edges 301 are arranged in a circumferential array on the inner wall of the female connector 4. The rear end of the protruding edge 301 is connected to the inner wall of the female connector 4 by a chamfer transition. The first collar 302 and the second collar 303 are sequentially fitted onto the outer wall of the male connector 5 from the outside to the inside. A set of spring pieces 304 are spirally arranged on the first collar 302. The overhanging end of the spring piece 304 is inclined upward. A top post 305 is fixed on the inner wall of the spring piece 304. The spring piece 304 and the top post are connected through the first collar 302 and the second collar 303. The clearance hole 306 of 305, the protruding edge 301 abuts against the outer wall of the spring piece 304 to form the forward drive of the spring piece 304, and the protruding edge 301 abuts against the top post 305 to form the upright drive of the top post 305. The length of the top post 305 is greater than the distance between the female connector 4 and the male connector 5. The upper end of the top post 305 is higher than the upper end of the spring piece 304, and the lower end of the top post 305 is spaced apart from the root of the spring piece 304. After the pipe body 2 rotates in the spiral direction of the spring piece 304, the spring piece 304 undergoes elastic deformation under the pressure of the protruding edge 301, allowing the male connector 5 to be smoothly inserted into the female connector 4. When the male connector 5 can no longer be inserted forward, the pipe body 2 is reversed, as... Figure 4 As shown, during the reversal of the rear pipe body 2, the top post 305 abuts against the convex edge 301, and the spring piece 304 is pushed in the opposite direction and bends. As the spring piece 304 bends, the top post 305 gradually returns to its original position from an inclined state to the radial direction along the male connector 5. As the rear pipe body 2 continues to reverse, the root of the spring piece 304 folds and deforms, while the upper end of the top post 305 enters the groove 307 and abuts against the inner wall of the groove 307 on the female connector 4, and the lower end of the top post 305 sinks through the clearance hole 306 and abuts against the outer wall of the male connector 5, correcting the coaxiality of the female connector 4 and the male connector 5. The groove 307 limits the front and rear positions of the top post 305. With the help of the friction between the top post 305 and the female connector 4 and the rear pipe body 2, the front pipe body 1 and the rear pipe body 2 are locked, effectively preventing the rear pipe body 2 from falling off.

[0032] The male connector 5 is also provided with a retaining ring 8 with the same outer diameter as the female connector 4. The rear end of the first glass fiber sheet 6 extends backward and overlaps the retaining ring 8 and the rear pipe body 2 in sequence. The retaining ring 8 positions the relative positions of the male connector 5 and the female connector 4 and provides rigid support for the first glass fiber sheet 6 to overlap and lay on the rear pipe body 2. The first glass fiber sheet 6 and the auxiliary glass fiber sheet 7 seal the adjacent ends of the retaining ring 8 and the female connector 4, further improving the connection reliability and sealing performance of the male connector 5 and the female connector 4.

[0033] A second fiberglass sheet 10 is provided on the rear pipe body 2. The male connector 5 is sleeved on the second fiberglass sheet 10. The rear end of the first fiberglass sheet 6 overlaps with the second fiberglass sheet 10 and is fixed with resin. When the front pipe body 1 and the rear pipe body 2 are locked, the lower end of the top column 305 abuts against the second fiberglass sheet 10 on the rear pipe body 2, applying pressure to the second fiberglass sheet 10 and improving the connection stability between the second fiberglass sheet 10 and the rear pipe body 2.

[0034] A sealing gasket 9 is provided on the inner end face of the female connector 4. When the retaining ring 8 abuts against the female connector 4, the front end of the rear pipe body 2 abuts against the sealing gasket 9, further enhancing the sealing between the front pipe body 1 and the rear pipe body 2.

[0035] A sealing connection method for laying fiberglass pipes in marine environments includes the following steps:

[0036] S1. On land, the front end of the first glass fiber sheet 6 is fixed to the front pipe body 1 with resin, and the rear end of the first glass fiber sheet 6 is folded forward on the outside of the front pipe body 1.

[0037] S2. After entering the ocean, place the front pipe body 1 and the rear pipe body 2 in front and back order, and fix the position of the front pipe body 1.

[0038] S3. Move the rear pipe body 2 forward and rotate the rear pipe body 2 in the spiral direction of the spring piece 304 so that the male connector 5 on the rear pipe body 2 is inserted into the female connector 4 of the front pipe body 1.

[0039] S4. After the retaining ring 8 abuts against the female connector 4, the pipe body 2 rotates in the opposite direction. The protruding edge 301 abuts against the top column 305, driving the top column 305 to be aligned until the upper end of the top column 305 is inserted into the groove 307 and the lower end abuts against the male connector 5. The pipe body 2 stops and cannot continue to rotate, and the front pipe body 1 and the rear pipe body 2 are locked together.

[0040] Furthermore, a pair of through holes are opened on the retaining ring 8, which are arranged vertically between each other. After the front pipe body 1 and the rear pipe body 2 are locked, glue is injected into the female connector 4 through one of the through holes. The other through hole is located at the upper end of the cavity of the female connector 4. When the overflowing material in the through hole at the upper end of the cavity of the female connector 4 is glue, the glue injection is stopped and the two through holes are blocked. Heating equipment is used to heat the retaining ring 8 and the female connector 4.

[0041] S5. Fold the rear end of the first glass fiber sheet 6 backward and overlap it on the retaining ring 8, and continue to extend backward and overlap it on the second glass fiber sheet 10 of the rear pipe body 2.

[0042] S6. Fill the gaps at the rear ends of the first glass fiber sheet 6 with auxiliary glass fiber sheets 7, and brush resin onto the rear ends of the first glass fiber sheet 6. Heat the resin-coated first glass fiber sheet 6 using a heating device to accelerate resin solidification, increasing the solidification speed by more than 30%. After the resin solidifies, the rear ends of the first glass fiber sheet 6 are connected to the second glass fiber sheet 10 and the rear pipe body 2 as a whole, completing the sealing connection between the front pipe body 1 and the rear pipe body 2. The heating device is an openable and closable tubular heating furnace.

Claims

1. A fiberglass pipeline for marine laying, characterized in that: The device includes a front pipe body (1) and a rear pipe body (2) connected to each other by a connecting mechanism. The connecting mechanism includes a limiting component (3), a female connector (4) located at the rear end of the front pipe body (1), and a male connector (5) located at the front end of the rear pipe body (2). The front pipe body (1) and the rear pipe body (2) are connected by the male connector (5) and the female connector (4). The limiting component (3) is located between the male connector (5) and the female connector (4) and is used to fix the male connector (5) and the female connector (4). The front pipe body (1) is provided with a first glass fiber sheet (6) covering the outer wall of the female connector (4). The rear end of the first glass fiber sheet (6) has a petal-like structure. The rear end of the first glass fiber sheet (6) extends backward and overlaps the rear pipe body (2). The rear pipe body (2) is also provided with an auxiliary glass fiber sheet (7) that overlaps the rear end of the first glass fiber sheet (6). The limiting component (3) includes a protruding edge (301), a first collar (302), a second collar (303), and a groove (307) disposed between the protruding edges (301). The protruding edges (301) are arranged in a circumferential array on the inner wall of the female connector (4). The rear end of the protruding edge (301) is connected to the inner wall of the female connector (4) by means of a chamfer transition. The first collar (302) and the second collar (303) are sequentially fitted onto the outer wall of the male connector (5) from the outside to the inside. A set of spring pieces (304) is spirally disposed on the first collar (302). The overhanging end of the spring piece (304) is inclined upward. A top post (305) is fixed on the inner wall. The first ring (302) and the second ring (303) are provided with clearance holes (306) for the spring piece (304) and the top post (305). The protruding edge (301) abuts against the outer wall of the spring piece (304) to form the forward drive of the spring piece (304). The protruding edge (301) abuts against the top post (305) to form the upright drive of the top post (305). The length of the top post (305) is greater than the distance between the female connector (4) and the male connector (5). The upper end of the top post (305) is higher than the upper end of the spring piece (304). The lower end of the top post (305) is spaced apart from the root of the spring piece (304).

2. The fiberglass pipeline for marine laying according to claim 1, characterized in that: The male connector (5) is also provided with a retaining ring (8) with the same outer diameter as the female connector (4). The rear end of the first glass fiber sheet (6) extends backward and overlaps the retaining ring (8) and the rear pipe body (2) in sequence.

3. The fiberglass pipeline for marine laying according to claim 2, characterized in that: The rear pipe body (2) is provided with a second glass fiber sheet (10), the male connector (5) is sleeved on the second glass fiber sheet (10), and the rear end of the first glass fiber sheet (6) overlaps and is fixedly connected to the second glass fiber sheet (10).

4. The fiberglass pipeline for marine laying according to claim 1, characterized in that: A sealing gasket (9) is provided on the inner end face of the female connector (4), and the front end of the rear pipe body (2) abuts against the sealing gasket (9).

5. A sealing connection method for laying fiberglass pipes in the ocean as described in claim 3, characterized in that, Includes the following steps: S1. On land, the front end of the first glass fiber sheet (6) is fixed to the front pipe body (1) with resin, and the rear end of the first glass fiber sheet (6) is folded forward on the outside of the front pipe body (1). S2. After entering the ocean, place the front pipe body (1) and the rear pipe body (2) in front and back order, and fix the position of the front pipe body (1). S3. Move the rear pipe body (2) forward and rotate the rear pipe body (2) in the spiral direction of the spring piece (304) so ​​that the male connector (5) on the rear pipe body (2) is inserted into the female connector (4) of the front pipe body (1); S4. After the retaining ring (8) abuts against the female connector (4), the pipe body (2) rotates in the opposite direction. The protruding edge (301) abuts against the top column (305), driving the top column (305) to be aligned until the upper end of the top column (305) is inserted into the groove (307) and the lower end abuts against the male connector (5). Then the pipe body (2) stops and cannot continue to rotate. S5. Fold the rear end of the first glass fiber sheet (6) backward and overlap it on the retaining ring (8), and continue to extend backward and overlap it on the second glass fiber sheet (10) of the rear pipe body (2); S6. Fill the gap between the rear end of the first glass fiber sheet (6) with an auxiliary glass fiber sheet (7), and brush resin onto the rear end of the first glass fiber sheet (6). Use a heating device to heat the first glass fiber sheet (6) with the resin to promote resin solidification and complete the sealing connection between the front pipe body (1) and the rear pipe body (2).

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