阅读说明：本技术 一种适用于海底管道登陆拖拉浮筒的制作工艺及安装方法 (Manufacturing process and installation method suitable for submarine pipeline landing dragging buoy ) 是由 魏作水 李建楠 李怀亮 甘惠良 柴昕辰 吴仕鹏 于文太 李斌 贺辰 高庆有 王振 于 2021-03-26 设计创作，主要内容包括：本发明公开了一种适用于海底管道登陆拖拉浮筒的制作工艺及安装方法,其中制作工艺通过以下步骤完成：制作模具；放入配件；注入原料；成型及后期处理。安装方法通过以下步骤完成：制作接头,并固定回收钢缆；使用打包带将海管和浮筒固定；使用栓紧带加固。本发明在绑扎浮筒时,浮筒与海管接触面积较大,避免了因风、浪等环境因素导致浮筒与海底管道脱落。(The invention discloses a manufacturing process and an installation method of a landing and dragging buoy suitable for a submarine pipeline, wherein the manufacturing process is completed by the following steps: manufacturing a mould; putting in accessories; injecting raw materials; molding and post-processing. The installation method is completed by the following steps: manufacturing a joint, and fixing a recovered steel cable; fixing the sea pipe and the buoy by using a packing belt; and (4) reinforcing by using a fastening belt. When the buoy is bound, the contact area between the buoy and the submarine pipeline is large, and the buoy and the submarine pipeline are prevented from falling off due to environmental factors such as wind, waves and the like.)

1. A manufacturing process suitable for a submarine pipeline landing dragging buoy is realized through the following steps, and is characterized in that:

(1) manufacturing a die required by forming the buoy;

(2) opening the upper part of the mold, and putting the pre-buried steel cable, the wire mesh and the pre-groove mold;

(3) covering the upper half part of the mold, and fixing the mold through bolts;

(4) injecting the mixed polyurethane foam raw material through a feed port;

(5) opening the mold after the buoy is molded, and taking out the pre-groove-opening mold;

(6) and bending lute heads at two ends of the embedded steel cable respectively by using steel cable clamps, and thus finishing the manufacture of the buoy.

2. The process for manufacturing the landing pulling buoy for the submarine pipeline according to claim 1, wherein: in the step (1), a groove is made on the lower half part of the die, so that a holding groove is formed on the formed buoy.

3. The process for manufacturing the landing pulling buoy for the submarine pipeline according to claim 1, wherein: in the step (2), two ends of the pre-buried steel cable are respectively exposed out of two ends of the mold, and the pre-groove mold is tightly attached to the inner wall of the mold.

4. A method for installing a landing and dragging buoy suitable for a submarine pipeline comprises the following steps:

s1, folding one end of the packing belt into a joint through a packing buckle, and sleeving the joint on the periphery of the recovered steel cable;

s2, the recovery steel cable is clamped and embedded in the prefabricated groove, and two ends of the embedded steel cable are respectively locked and connected to the recovery steel cable;

s3, wrapping the packing belt around the buoy and the sea pipe for a circle, and fixing the buoy and the sea pipe together;

s4, tightening the packing belt through a pneumatic tensioning machine, and fixing the packing buckle through a buckling machine;

and S5, fixing and binding the two ends of the buoy with the marine pipe again through the fastening belts, and finishing the installation of the buoy.

Technical Field

The invention relates to a manufacturing process and an installation method of a landing dragging buoy suitable for a submarine pipeline.

Background

The long-distance and large-diameter submarine pipeline is landed and dragged, and the weight of the submarine pipeline in water is reduced by adopting a buoy binding mode generally, so that the friction force between the submarine pipeline and a seabed is reduced. In the landing and towing construction stage, the situation that the weight of the marine pipe in water is increased due to the separation of the buoy and the submarine pipeline, the landing and towing tension is increased due to the increase of the friction force between the marine pipe and the seabed, and finally the landing and towing construction difficulty is increased or even fails is avoided as much as possible.

The design and installation method of the existing submarine pipeline landing dragging buoy generally comprises the following steps:

1. the steel shell is filled with foam to make a cylindrical buoy. The buoy in the form has small contact area with the sea pipe, is expensive in manufacturing cost and is easy to damage;

2. and (4) binding and fixing the buoy at the designed position of the marine pipe by using a nylon rope. Although the method is simple in form, the binding effect of the buoy is not good, and the nylon rope is easy to break under the combined action of environmental factors (wind, wave), soil friction and the like, so that the buoy falls off, the dragging tension is increased, and even the landing dragging fails.

Disclosure of Invention

The invention provides a manufacturing process and an installation method of a landing and dragging buoy suitable for a submarine pipeline, and solves the problems that the contact area between the buoy and a submarine pipeline is small and the buoy is easy to damage.

In order to solve the technical problems, the invention provides a manufacturing process and an installation method of a landing and dragging buoy suitable for a submarine pipeline, which are realized by the following steps:

(1) manufacturing a die required by forming the buoy;

(2) opening the upper part of the mold, and putting the pre-buried steel cable, the wire mesh and the pre-groove mold;

(3) covering the upper half part of the mold, and fixing the mold through bolts;

(4) injecting the mixed polyurethane foam raw material through a feed port;

(5) opening the mold after the buoy is molded, and taking out the pre-groove-opening mold;

(6) and bending lute heads at two ends of the embedded steel cable respectively by using steel cable clamps, and thus finishing the manufacture of the buoy.

Further, in step (1), a groove is formed in the lower half of the mold to form a receiving groove in the formed buoy.

Furthermore, in the step (2), two ends of the pre-buried steel cable are respectively exposed out of two ends of the mold, and the pre-groove mold is tightly attached to the inner wall of the mold.

A method for installing a landing and dragging buoy suitable for a submarine pipeline comprises the following steps:

s1, folding one end of the packing belt into a joint through a packing buckle, and sleeving the joint on the periphery of the recovered steel cable;

s2, the recovery steel cable is clamped and embedded in the prefabricated groove, and two ends of the embedded steel cable are respectively locked and connected to the recovery steel cable;

s3, wrapping the packing belt around the buoy and the sea pipe for a circle, and fixing the buoy and the sea pipe together;

s4, tightening the packing belt through a pneumatic tensioning machine, and fixing the packing buckle through a buckling machine;

and S5, fixing and binding the two ends of the buoy with the marine pipe again through the fastening belts, and finishing the installation of the buoy.

The invention has the technical effects that: (1) the polyurethane foam replaces the traditional steel shell to fill the foam to manufacture the buoy, and the formed polyurethane foam has the advantages of pressure resistance, no internal gap, corrosion resistance and the like, so that the buoy is prevented from mechanical damage caused by factors such as environment and the like in the construction process; (2) in the pouring process, a wire mesh is additionally arranged inside the floating drum, so that the bending moment resistance and the shearing resistance of the floating drum are improved; (3) after the buoy is formed, the bottom of the buoy is provided with an accommodating groove matched with the sea pipe, and the whole buoy is saddle-shaped so as to ensure that a larger contact area exists with a submarine pipeline and increase the stability of the buoy after installation; (4) the buoy is installed at the designed position of the submarine pipeline by using the locking machine and the pneumatic tensioning machine in combination with the steel packing belt, and the two ends of the buoy are reinforced by using the bolting belt.

Drawings

FIG. 1 is a schematic view of a buoy according to the present invention.

Fig. 2 is a schematic view of the buoy of the present invention installed in a sea pipe.

Fig. 3 is a schematic view of a mold in the present invention.

Figure 4 is a schematic representation of the strapping pattern of the strapping band of the present invention.

Reference numerals: a buoy-1; pre-burying a steel cable-2; 3, a wire mesh; a trench-4; lute head-5; recovering the steel cable-6; a fastening belt-7; a packing belt-8; packing buckle-9; sea pipe-10.

Detailed Description

The present invention is further described with reference to the following drawings and specific examples so that those skilled in the art can better understand the present invention and can practice the present invention, but the examples are not intended to limit the present invention.

In the embodiment, as shown in fig. 1 to 4, the invention discloses a manufacturing process of a landing and pulling buoy suitable for a submarine pipeline, which comprises the following steps:

(1) and manufacturing a die required by forming the buoy 1.

As shown in fig. 3, the mould is generally made by steel material, is equipped with the recess on the latter half of mould to form the holding tank on the mould after making the shaping, the holding tank can hold sea pipe 10 when ligature flotation pontoon 1 and sea pipe 10, has increased the area of contact of sea pipe 10 and flotation pontoon 1, makes the ligature more stable, firm.

(2) And (3) opening the upper part of the mould, and putting the pre-embedded steel cable 2, the wire mesh 3 and the pre-grooving mould.

Two ends of the pre-buried steel cable 2 are respectively exposed out of two ends of the mould, and the pre-groove mould is tightly attached to the inner wall of the mould. The pre-grooved mould enables the mould to be shaped with grooves 4 to accommodate the retrieval of the steel cable 6.

As shown in fig. 1, the wire 3 is placed inside the pre-trenching mold to serve as a supporting framework for the buoy 1, so as to improve the strength and durability of the buoy 1.

(3) The upper half of the mold is covered and the mold is fixed by bolts.

(4) And injecting the mixed polyurethane foam raw material through the feed inlet.

(5) And opening the mold after the buoy 1 is molded, and taking out the pre-groove-opening mold.

After the polyurethane foam is in the mold for a period of time, the finished buoy 1 can be formed.

(6) And bending lute heads 5 at two ends of the embedded steel cable 2 by using steel cable clamps respectively, and finishing the manufacturing of the buoy 1.

As shown in fig. 2, when the buoy 1 is provided with the marine pipe 10, the lute head 5 can conveniently fix the two ends of the embedded steel cable 2 on the recovery steel cable 6.

The invention also discloses a method for installing the landing and dragging buoy suitable for the submarine pipeline, which comprises the following steps:

s1, folding one end of a packing belt 8 into a joint through a packing buckle 9, and sleeving the joint on the periphery of the recovered steel cable 6;

as shown in fig. 4, the retrieval cable 6 is threaded into the fitting.

S2, the recovery steel cable 6 is clamped and embedded in the prefabricated groove 4, and two ends of the embedded steel cable 2 are respectively locked and connected to the recovery steel cable 6;

s3, winding the packing belt 8 around the buoy 1 and the sea pipe 10 for a circle, and fixing the buoy 1 and the sea pipe 10 together;

make the holding tank on flotation pontoon 1, just half parcel sea pipe 10 to increase area of contact between the two.

S4, tightening the packing belt 8 through a pneumatic tensioning machine, and fixing the packing buckle 9 through a locking machine;

and S5, fixing and binding the two ends of the buoy 1 with the marine pipe 10 again through the fastening belts 7, and finishing the installation of the buoy 1.

The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.