CN209146602U - A multipurpose pipe suspended in water - Google Patents

Abstract

The utility model is a multi-purpose pipeline suspended in water, which is mainly composed of a pipeline, an anchor cable and a concrete counterweight block. The composite structure of the pipe-in-pipe is adopted to enhance the durability of the pipeline. The composite waterstop formed by the special GINA waterstop and OMEGA waterstop in the flange ensures the tightness of the pipeline. The gravity anchoring method is simple and environmentally friendly, and is provided together with the anchor cable with the damper installed. It has good seismic performance and reduces the adverse effects of seabed emptying. The utility model can effectively solve the problems and disadvantages of the existing submarine oil pipelines, oil transportation by ships on the sea surface and the inconvenience of erecting municipal pipelines between two shore bases, and has the advantages of simple and fast construction, green environmental protection, safety and reliability, and good social and economic benefits. advantage.

Description

A multipurpose pipe suspended in water

technical field

The utility model belongs to the field of civil engineering, in particular to a multipurpose pipeline suspended in water.

Background technique

With the development of society, in some production and life scenarios, it is often necessary to connect or transport across waters. For example, oil drilling platforms in the sea transport the extracted crude oil to the land. The traditional methods include ship transportation and submarine pipeline transportation. In terms of ship transportation, it is greatly affected by weather, and the transportation cost is high, which is time-consuming and labor-intensive; in terms of submarine pipeline transportation, its construction cost is relatively high, and post-maintenance and repair are difficult, and its seismic performance is poor. In the earthquake zone, it is often affected by earthquakes, which may disturb the pipelines and increase maintenance costs, or damage the pipelines and cause oil leakage, pollute the environment, and cause endless troubles. In addition, to connect the municipal pipelines such as communication cables, electric wires, gas pipelines, heating and water supply on land with the island or the other side, most of them use the method of immersing pipes in water or erecting pipes on the water surface, which also faces many construction difficulties and costs. The problem.

Therefore, in view of the shortcomings and shortcomings of the existing solutions, it is urgent to develop a new type of water transportation and connection method, which can make people's production and life more convenient.

After patent and literature search, there is a patent for research on this kind of engineering, the patent publication number is CN103822019A. Through the study and research of this patent, the following points are worthy of further discussion:

There are three ways to fix the pipeline: tension leg type, buoy type and fixed support. Among them, the tension leg type anti-uplift pile needs to be drilled and grouted at the bottom of the water, which has poor operability and is difficult to construct. The engineering excrement will pollute the water quality, and there is a lot of silt in the water, which will increase the length of the anti-uplift pile and increase the project cost; buoys The fixed bearing type is seriously affected by water surface waves, so that the position of the pipeline cannot be fixed, which increases the possibility of damage to the buoy and the pipeline, and at the same time affects the water surface traffic and destroys the original appearance in terms of appearance; the fixed bearing type has a large amount of underwater engineering and seismic performance. Poor, if the bottom of the water is very deep, the fixed support needs to be very large, so the economy cannot be guaranteed.

When the tension leg is used as the fixing method in this invention, the length of the anti-floating anchor cable used is unchanged and cannot be stretched, and the seabed and river bottom are often affected by the fluctuation of the ocean current, and the phenomenon of emptying often occurs, so the underwater fixing The device is easy to be displaced, thus changing the original pipeline route, affecting the transportation and increasing the later operation and maintenance cost.

The joints of the pipe sections have poor waterproof performance and are easily corroded. After being disturbed, the stress between the pipe sections and the casing is large, which reduces the durability of the pipes. In addition, the untreated pipe body is a steel pipe or a steel-mixed composite pipe, which has poor durability, low temperature resistance and corrosion resistance.

Utility model content

The purpose of the utility model is to provide a multi-purpose pipeline suspended in water, which has solved the problem of the existing cross-water connection scheme.

In order to achieve the above purpose, the technical scheme adopted by the present utility model is: a multi-purpose pipeline suspended in water, which is characterized in that it comprises an inner pipe and an outer pipe arranged concentrically, and an anti-corrosion layer and an outer pipe are arranged between the inner pipe and the outer pipe. Insulation layer; the pipeline is connected to the counterweight sinking to the bottom of the water through several retractable anchor cables.

Further, the cross-sections of the inner tube and the outer tube are both circular, and the inner tube and the outer tube are both anti-corrosion seamless steel tubes.

Further, the anchor cable is provided with a damper, and the expansion and contraction deformation of the anchor cable is realized by the damper.

Further, the two adjacent pipelines are connected by flanges, the flanges are provided with several bolt holes in the circumferential direction, and the flanges are connected by connecting prestressed bolts in the bolt holes.

Further, a composite waterstop is arranged between adjacent flanges, and the composite waterstop is a GINA waterstop and an OMEGA waterstop.

Further, the contact surface of the counterweight block and the water bottom is provided with a concave-convex curved surface, and the top surface of the counterweight block is provided with a pre-embedded part; the pre-embedded part is arranged in an inverted U shape, and the surface of the pre-embedded part is provided with Anti-corrosion coating.

Further, the middle part of the counterweight block is hollow.

Further, the diameter of the inner tube is 0.3-1.8 meters, and the diameter of the outer tube is 0.5-2.0 meters.

Further, the anti-corrosion layer is an epoxy resin anti-corrosion layer.

Further, the thermal insulation layer is a composite polyurethane thermal insulation layer.

Compared with the prior art, the present utility model at least has the following beneficial effects:

The utility model improves the strength of the pipeline and greatly increases the rigidity and durability of the pipe body by using the pipe-in-pipe structure in which the inner pipe and the outer pipe are double-layered; The gravity of the heavy block anchors the pipeline, and the retractable anchor cable can make the pipeline adapt to the influence of ocean current fluctuations on the seabed and prevent the occurrence of voiding. The pipe body fixing method of the utility model has simple construction process and low cost.

Further, both the inner and outer pipes are made of anti-corrosion seamless steel pipes, which can cope with the complex environment of underwater water flow, prevent corrosion and enhance durability.

Further, the anchor cable realizes the expansion and contraction deformation through the set damper, and the structure is simple and reliable. The damper can adapt to the expansion and contraction deformation according to the action of the ocean current, the change of the seabed topography and the influence of the earthquake, which is more conducive to the overall stability of the pipeline.

Further, by arranging a connecting flange between the two pipes, and arranging a composite waterstop including a GINA waterstop and an OMEGA waterstop between the flanges, the two constitute a waterproof system for flexible pipe joints. The flexible joint pipe section is beneficial to the overall stress of the tunnel, and can absorb the stress caused by earthquakes, temperature differences, differential settlement of the stratum, uneven back silting, etc., and can ensure the water-stop performance between pipes in a complex environment.

Further, the hollowing out of the middle of the counterweight is conducive to the binding of the bottom mud to the counterweight, further improving the adhesion between the counterweight and the bottom of the water, thereby enhancing the pulling force of the counterweight on the pipeline, so that the pipeline can be more stable. Suspended in water; the bottom of the counterweight is set to be concave and convex, which can increase the contact area between the counterweight and the bottom of the water to improve the adhesion between the counterweight and the bottom of the water, thereby improving the stability of the counterweight on the bottom of the water and stabilizing the pipeline. It can be controlled at the corresponding water depth to reduce its fluctuation range; by setting the embedded part on the other side of the counterweight, the connection with the anchor cable can be realized.

Further, the epoxy resin anti-corrosion layer and the composite polyurethane thermal insulation layer are low in price and excellent in performance, which are easy to purchase and have mature coating technology and easy construction.

Description of drawings

Fig. 1: the three-dimensional schematic diagram of the suspension pipeline of the present utility model;

Fig. 2: Pipeline sectional view without flange plate installed in the utility model;

Fig. 3: the sectional view of the installation flange in the utility model;

Figure 4: Schematic diagram of the connection between pipe sections;

Figure 5: Schematic diagram of the counterweight;

In the picture: 1-Pipe, 2-Inner pipe, 3-Anti-corrosion layer, 4-Insulation layer, 5-Outer pipe, 6-Anchor cable, 7-Concrete counterweight, 8-Flange plate, 9-Composite stop Hose, 10-bolt hole, 11-damper, 12-embedded part, 13-hole.

Detailed ways

The present utility model will be further described below in conjunction with the accompanying drawings.

Referring to Figure 2, the utility model is a multi-purpose pipeline suspended in water, which is made of double-layer steel pipes with an inner diameter of 0.3 to 1.8 meters and an outer diameter of 0.5 to 2.0 meters. Pre-fabricated, and the inner tube 2 of the inner layer and the outer tube 5 of the outer layer are made of anti-corrosion seamless steel pipes to ensure the safety of the pipeline. An anti-corrosion layer 3 and a thermal insulation layer 4 are also arranged between the inner pipe 2 and the outer pipe 5 of the pipeline 1 .

When the outer tube 5 of the jacket is manufactured, a protruding hook is reserved on the side of the side wall of the tube body close to the water bottom, and the hook is used for connecting with the anchor cable 6 .

In the present invention, a damper 11 is arranged at the middle position of each anchor cable 6, and the damper 11 has a certain expansion and deformation capacity; the damper 11 can be a hydraulic damper, a viscous damper, or a High-strength springs to meet the complex environment of the bottom.

The anti-corrosion layer 3 applied to the outer wall of the inner tube is made of epoxy resin. Before painting, the tube body should be cleaned to ensure that the painted surface is clean and the consistency of the paint should be strictly controlled. If it needs to be diluted, it should be diluted with epoxy thinner; Apply the anti-corrosion layer to avoid finishing the application at one time, so as to control the thickness of the anti-corrosion layer. When the construction environment is near the sea, pay attention to the environment temperature during application should be 10 ~ 40 ℃, and the relative humidity should not be greater than 80%. When the construction environment temperature is lower than 0 ℃, measures should be taken to heat up, and do not continuously expose the anti-corrosion material and its accessories to the environment with a temperature of 40 ℃ and above.

The thermal insulation layer 4 is wrapped on the outside of the anti-corrosion layer 3. When the thermal insulation layer 4 is made, a rigid foam composite polyurethane material with functions such as waterproofing and thermal insulation is formed by mixing and reacting the materials of Group A and Group B. The material is composed of combined polyol polyester and foaming agent, and the hydroxyl content is preferably 0.7±0.1%; the second component is mainly isocyanate, and the isocyanate group content is preferably 3.5±0.2%. The two components should be kept separately and stored in a dry and ventilated place. Pay attention to the fire prevention of the warehouse. When using, mix the two materials in a ratio of 1:1 to form a polyurethane insulation layer. After the outer pipe 5 steel pipe set is completed, it is also necessary to check whether the filling of the insulation layer 4 is dense. If it is not dense, a pressure spray gun can be used to carry out the insulation layer 4 dense construction to ensure the integrity of the pipeline 1, so that there are no air bubbles, holes, etc. in the inner and outer pipes. , so as not to affect the subsequent use of the pipeline.

As shown in Figure 4, the fabricated pipeline 1 is connected through the flange 8. When making the flange 8, it needs to be anti-corrosion construction. While galvanizing is used for electrochemical anti-corrosion, the outer layer should also be oiled . Referring to Figure 3, several bolt holes 10 are made on the flange of the flange 8 according to the size of the circumference, and a water stop is made on the flange 8. The water stop adopts the GINA water stop and OMEGA similar to those in the immersed tunnel. The composite waterstop 9 formed by the waterstop; the bolts fixing the two flanges 8 are prestressed bolts made of high-strength steel; after that, according to the underwater hydrogeological conditions and the requirements for laying pipelines, the counterweight 7 Descend to the predetermined position, and adjust the counterweight 7 to make it in the right position, so that the embedded part 12 on the counterweight 7 faces upwards, and the embedded part 12 can be bent into a semi-circle on the shore using steel bars of suitable diameter Or arc-shaped, coated with anti-corrosion material, insert the lower end of the embedded part 12 into its top surface when pouring the concrete counterweight 7, and the uninserted part and the top surface form a semi-circular hole for connecting the anchor cable. After reaching the standard, the embedded parts 12 are fixed to the concrete; then each pipeline 1 is lowered to a preset depth, and the pipeline 1 is connected with the embedded parts 12 on the counterweight 7 by the anchor cable 6; the posture of the pipeline 1 is adjusted. In order to make it meet the requirements; finally, the two pipes 1 are connected through the flange 8 with prestressed bolts, and the hydraulic torque wrench is used to tighten the bolts, which can apply the specified prestress; Determine whether the bolt stress value meets the standard, adjust the bolts that do not meet the standard one by one, remove the temporary blocking material after passing the standard, and check the tightness of the pipeline.

As shown in Figure 1, the utility model is a multi-purpose pipeline suspended in water. The top surface of the pipeline 1 is 25 to 40 meters away from the water surface. One end of the anchor cable 6 is fixedly connected with the pipeline 1, and the other end is connected with a counterweight 7. The counterweight is pre-sunk to the bottom of the water to provide tension and prevent the pipeline float. The counterweight block 7 is made of concrete, and the embedded parts 12 are arranged on the counterweight block 7 to facilitate the connection of the anchor cable 6 .

The construction method of the pipeline suspended in water in the present utility model is as follows: first, several standard pipelines 1 are made on the shore, and epoxy resin is applied to the outer wall of the inner pipe 2 of each pipeline 1 to form an anti-corrosion layer 3. A layer of insulation layer 4 is arranged on the outer wall, the insulation layer 4 is close to the anti-corrosion layer 3, and the insulation layer 4 is made of composite polyurethane material; an outer tube 5 is sleeved outside the insulation layer. If the insulation layer 4 is not compact, it should be further filled. Ensure the integrity of each pipeline 1; then, temporarily block both sides of the pipeline 1, and make a flange 8. The flange of the flange 8 is made into several bolt holes 10 according to the size of the circumference. 8, a composite waterstop 9 formed by GINA waterstop and OMEGA waterstop is made, and the bolts for fixing the two flanges 8 are prestressed bolts made of high-strength steel; To meet the requirements, first sink the concrete counterweight 7 to a predetermined position, and adjust the counterweight 7 so that it is placed in an appropriate position and the embedded parts 12 on the counterweight 7 face upwards, and then place each section of the pipeline. Submerge to a predetermined depth, connect the pipeline 1 with the embedded parts 12 on the counterweight 7 with the anchor cable 6; finally, connect the two pipelines 1 with prestressed bolts. Whether the stress of the bolts is up to the standard, adjust the bolts that do not meet the standard one by one, remove the temporary blocking material after passing the standard, and check the tightness of the pipeline. The pipe body fixing bolt of the utility model is a high-strength prestressed bolt, the anchoring performance is enhanced, the sealing performance of the pipe body is higher, and the anti-wave flow disturbance and impact resistance at the joint of the pipe section are stronger.

By adopting the above construction means, the utility model has the following beneficial effects: simple construction, low cost, good seismic performance, not restricted by climatic conditions, convenient later maintenance and repair, and small impact on the environment.

In the present invention, the pipeline 1 itself does not contain counterweight, the pipeline is anchored by the gravity of the concrete counterweight 7 , and the buoyancy of the pipeline 1 is mainly borne by the pulling force of the anchor cable 6 .

In the preferred embodiment of the present utility model, the concrete counterweight 7 is set as a non-solid body with a hollowed-out arrangement, and the surface of the counterweight 7 in contact with the water bottom is treated with unevenness, so as to increase the contact between the counterweight 7 and the water bottom. The area improves adhesion, thereby improving the stability of the counterweight on the bottom of the water.

As shown in FIG. 5 , the sides of the counterweight 7 are hollowed out. Specifically, holes 13 are provided on the four sides of the counterweight 7, and the four holes 13 are connected, so that when the counterweight sinks to the bottom of the water , which is conducive to the formation of a clamp on the counterweight 7 by the sludge at the bottom, further improving the adhesion between the counterweight 7 and the bottom of the water, thereby enhancing the pulling force of the counterweight 7 on the pipeline, so that the pipeline can be more stably suspended in the water. .

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than being a limitation. Although the specific implementation of the present utility model has been described in detail with reference to the foregoing, those skilled in the art should understand that To the following content: technicians can still revise the aforementioned technical solutions, or perform equivalent replacements to some of the technical features, so that the present utility model can be reasonably applied to actual projects; Replacement does not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the present invention.

Claims (10)

1. A multi-purpose pipeline suspended in water, characterized in that it comprises an inner pipe (2) and an outer pipe (5) arranged concentrically, and an anti-corrosion layer (3) is provided between the inner pipe (2) and the outer pipe (5). ) and the thermal insulation layer (4); the pipeline (1) is connected to the counterweight (7) sinking to the bottom of the water through several retractable anchor cables (6). 2. A kind of multipurpose pipeline suspended in water as claimed in claim 1, is characterized in that, the cross section of described inner pipe (2) and outer pipe (5) is circular, and inner pipe (2) and outer pipe (5) All are anti-corrosion seamless steel pipes. 3. The multi-purpose pipeline suspended in water according to claim 1, wherein the anchor cable (6) is provided with a damper (11), and the anchor cable (6) is provided with a damper (11). Telescopic deformation. 4. The multipurpose pipeline suspended in water as claimed in claim 1, characterized in that, two adjacent pipelines are connected by a flange (8), and the flange (8) has a circumferential flange. Several bolt holes (10) are provided, and the flange plate (8) is connected by connecting prestressed bolts in the bolt holes (10). 5. The multi-purpose pipeline suspended in water according to claim 4, characterized in that a composite waterstop (9) is provided between adjacent flanges (8), and the composite waterstop Belt (9) is GINA waterstop and OMEGA waterstop. 6. The multipurpose pipeline suspended in water according to claim 1, wherein the contact surface of the counterweight (7) and the bottom of the water is provided with a concave-convex curved surface, and the top of the counterweight (7) is provided with a concave-convex curved surface. A pre-embedded part (12) is arranged on the surface; the pre-embedded part (12) is arranged in an inverted U shape, and the surface of the pre-embedded part is provided with an anti-corrosion coating. 7. The multipurpose pipeline suspended in water according to claim 1 or 6, characterized in that the middle part of the counterweight (7) is hollowed out. 8 . The multipurpose pipeline suspended in water according to claim 7 , wherein the diameter of the inner pipe ( 2 ) is 0.3-1.8 meters, and the diameter of the outer pipe ( 5 ) is 0.5-2.0 meters. 9 . 9 . The multi-purpose pipeline suspended in water according to claim 1 , wherein the anti-corrosion layer ( 3 ) is an epoxy resin anti-corrosion layer. 10 . 10 . The multipurpose pipeline suspended in water according to claim 1 , wherein the thermal insulation layer ( 4 ) is a composite polyurethane thermal insulation layer. 11 .