Splicing and water entering method for long and large pipeline

Abstract

The invention discloses a splicing and water entering method for a long and large pipeline. The splicing and water entering method comprises the steps that firstly, a splicing welding station, an anti-corrosion station and a water entering station are sequentially arranged on a pipeline splicing platform at intervals from back to front; secondly, the multiple pipe joints are hoisted and placed on the assembling and welding stations of the pipeline splicing platform through a crawler crane; thirdly, the pipeline sections are pulled forwards to an anti-corrosion station through steel wire ropes on a plurality of winches; fourthly, the ends of the steel wire ropes on the winches are sequentially wound around the corresponding rear fixed pulleys and the corresponding front fixed pulleys downwards, and then the steel wire ropes on the winches pull the pipeline sections forwards to a launching station; and 5, when the tide rises, the pipeline sections are pulled forwards to the gentle slope through the steel wire ropes on the winches, then the steel wire ropes on the winches are dragged slowly, and the pipeline sections freely roll to the water along the launching sliding table by means of the gravity center. Pipeline splicing and water draining are facilitated, and the finished product quality of the pipeline can be protected.

Description

Technical Field

[0001] The invention relates to a method for splicing and putting into water a long and large pipeline. Background Art

[0002] During the sea drainage pipe laying construction, due to the long length of the sea drainage pipe, it is necessary to assemble it in multiple sections, that is, first transport the pipe sections made in the steel pipe manufacturing factory to the coast of the launching area for extension to form each section of the pipe, then launch each section of the pipe into the water by rolling, then use the floating and dragging method to transport each section of the pipe to the specified area for pipeline sinking, and finally assemble each section of the pipe underwater to form the sea drainage pipe. If unfavorable measures are taken when launching the pipe section, and the pipe section cannot be launched smoothly, it may cause damage to the pipe section or the anti-corrosion layer of the pipe section. Summary of the invention

[0003] The purpose of the present invention is to overcome the defects of the prior art and provide a method for splicing and entering water of a long and large pipe, which not only facilitates the splicing of pipe segments, but also can greatly improve the quality protection of the finished product of the pipe segments entering water and improve the water entry efficiency of the pipe segments.

[0004] The object of the present invention is achieved as follows: a method for splicing and launching a long and large pipeline, which adopts a pipeline splicing platform built on the coast and including a pipeline splicing platform parallel to the coastline in length direction, a launching slide and several driving mechanisms; wherein,

[0005] The pipeline splicing platform comprises a plurality of platform beams arranged perpendicularly to the coastline at intervals; two platform beams correspondingly located at both ends of the pipeline splicing platform and a plurality of platform beams arranged at intervals in the middle of the pipeline splicing platform are slideway platform beams; each platform beam adopts a single H-shaped steel; each slideway platform beam adopts two H-shaped steels arranged at intervals; each platform beam and each slideway platform beam are respectively supported by a row of platform steel pipe piles, and a winch steel pipe pile is respectively driven on the rear side of a row of platform steel pipe piles corresponding to each slideway platform beam, and the top elevation of the winch steel pipe pile is the same as the top elevation of the platform steel pipe pile;

[0006] The water slide is composed of a plurality of water slide beams fixed on the mortar-laid slab stone slope protection surface and connected one by one to the front ends of a plurality of slide platform beams; each water slide beam is a reinforced concrete beam with a rectangular cross section, and a gentle slope is provided between the top end of each water slide beam and the front end of the corresponding slide platform beam;

[0007] Several driving mechanisms are installed one by one between several winch steel pipe piles and several slideway platform beams; each driving mechanism includes a winch installed on the winch steel pipe pile, a rear fixed pulley installed between two H-shaped steels at the front of the slideway platform beam, and a front fixed pulley installed between two H-shaped steels at the front end of the slideway platform beam;

[0008] The method for splicing and entering water of a long and large pipeline of the present invention comprises the following steps:

[0009] Step 1: Set up the assembly welding station, anti-corrosion station and launching station in sequence from the back to the front on the pipeline splicing platform, and mark the assembly welding station, anti-corrosion station and shipping station with paint on each platform beam and slideway platform beam of the pipeline splicing platform;

[0010] Step 2: Use a crawler crane to hoist multiple pipe sections and place them on the assembly and welding station of the pipeline splicing platform. Manually cooperate with the crawler crane to complete the alignment of adjacent pipe sections and assemble them into a pipeline segment with a length of L. Then, triangular wooden wedges are inserted on both sides of the bottom of the pipe section located on the assembly and welding station, and then the splicing circumferential seam welding between two adjacent pipe sections is performed, and the weld is inspected. Then, several hooks corresponding to several slide platform beams are welded on the same busbar on the outer surface of the pipeline segment.

[0011] Step three, first, the ends of the steel wire ropes on several winches are respectively passed downward around the corresponding rear fixed pulleys, and then hung on the hooks of several pipeline segments one by one, then the triangular wooden wedges placed on the assembly and welding station are removed, and then several winches are synchronously started through the same control cabinet, and the steel wire ropes on several winches pull the pipeline segment forward to the anti-corrosion station, and then triangular wooden wedges are respectively plugged on both sides of the bottom of the pipeline segment located at the anti-corrosion station, and the pipeline joints are treated with anti-corrosion, and finally, socket flanges are respectively welded at both ends of the pipeline segment, and the two ends of the pipeline segment are sealed with flange blind plates, and the traction rope is tied to the flange blind plates at the same time;

[0012] Step 4: First, the ends of the steel wire ropes on several winches are respectively passed downward around the corresponding rear fixed pulley and front fixed pulley in turn, and then hung on the hooks of several pipeline segments one by one. Then, the triangular wooden wedges placed on the anti-corrosion station are removed, and then several winches are synchronously started through the same control cabinet. The steel wire ropes on several winches pull the pipeline segment forward to the launching station, and then triangular wooden wedges are respectively inserted on both sides of the bottom of the pipeline segment located at the launching station, so that the pipeline segment is on standby at the launching station;

[0013] Step five, wait until high tide, first remove the triangular wooden wedges placed on the launching station, then control the rotation speed of several winches through the same control cabinet, and use the steel wire ropes on several winches to pull the pipeline segment forward to the gentle slope between the launching slide and the pipeline splicing platform, then slowly release the steel wire ropes on several winches, so that the pipeline segment can roll freely along the launching slide to the water by relying on the center of gravity, and the pipeline segment with both ends blocked will naturally float up after being submerged in the water. As the pipeline segment rolls downward, the ends of the steel wire ropes on several winches will naturally fall off the hooks, and finally the steel wire ropes on several winches are retracted, and the pipeline segment in the water is towed out by the anchor boat.

[0014] In the above-mentioned method for splicing and putting into water long and large pipelines, there are three platform steel pipe piles in each row, and a square pile top capping steel plate is fixed on the top surface of each platform steel pipe pile.

[0015] The above-mentioned method for splicing and launching long and small pipes into water, wherein, an I-beam is embedded on both sides of the top surface inside each of the launching slide beams; a beam top steel plate welded to the top surfaces of the upper wing plates of the two I-beams is laid on the top surface of each launching slide beam; a trolley limiting mechanism is also provided on each launching slide beam, and the trolley limiting mechanism includes two lateral limiting plates welded to the two side surfaces of the beam top steel plate in a one-to-one correspondence, two blocking plates symmetrically welded to the exposed surfaces of the I-beams on both sides near the top of the launching slide beam, and a blocking round steel inserted into a circular hole opened in the middle of the two blocking plates.

[0016] In the above-mentioned method for splicing and launching long and large pipes into water, a slope foot steel pipe pile is driven at the slope foot of each of the launching slideway beams.

[0017] The method for splicing and launching a long and large pipeline of the present invention has the following characteristics: it integrates the functions of pipeline splicing and launching, adopts steel pipe piles as the load-bearing piles of the pipeline splicing platform, and the launching slideway beam is supported by a mortar-laid stone slope protection surface, and adopts a reinforced concrete beam, which has strong strength, rigidity and stability, and also has anti-overturning stability, wind resistance and anti-skid safety, etc. It is not only convenient for the splicing and launching of pipeline segments, but also can form an assembly line operation of pipeline segments, and also reduces the land occupation and construction cost of the pipeline segment prefabrication site, and can greatly improve the quality protection of the finished product of the pipeline segment entering the water. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a plan view of a splicing platform used in the method for splicing and entering water of a long and large pipe of the present invention;

[0019] Figure 2 It is a longitudinal section view of a splicing platform used in the method for splicing and entering water of a long and large pipeline of the present invention;

[0020] Figure 2ais a cross-sectional view of a water slide beam in a splicing platform of the present invention;

[0021] Figure 3 It is a state diagram when performing step 2 of the method for splicing and entering water of a long and large pipe of the present invention;

[0022] Figure 4 It is a state diagram when performing step 3 of the method for splicing and entering water of a long and large pipe of the present invention;

[0023] Figure 5 It is a state diagram when performing step 4 of the method for splicing and entering water of a long and large pipe of the present invention;

[0024] Figure 6 It is a state diagram when performing step five of the method for splicing and entering water of a long and large pipe of the present invention. DETAILED DESCRIPTION

[0025] The present invention will be further described below in conjunction with the accompanying drawings.

[0026] See also Figures 1 to 6 The method for splicing and launching a long and long pipeline of the present invention adopts a splicing platform built on the coast and including a length direction parallel to the coastline, and the splicing platform includes a pipeline splicing platform, a launching slide and several driving mechanisms; wherein,

[0027] The height of the pipeline splicing platform is 1m to 2m and includes a plurality of platform beams 11 arranged perpendicular to the coastline at intervals of about 18m; two platform beams located at both ends of the pipeline splicing platform in a one-to-one correspondence and a plurality of platform beams located at intervals in the middle of the pipeline splicing platform as slideway platform beams 12 (see Figure 1 and Figure 2 ); each platform beam 11 is made of a single H200×200×8×12 steel; each slideway platform beam 12 is made of two H340×250×9×14 steels arranged at intervals; each platform beam 11 and each slideway platform beam 12 are supported by a row of platform steel pipe piles, each row of platform steel pipe piles is composed of three platform steel pipe piles 13 with an outer diameter of 630mm and arranged at intervals, and the spacing between the three platform steel pipe piles 13 is 4m and 5m, A square pile top cap steel plate 130 with a size of 750mm×750mm is fixed on the top surface of each platform steel pipe pile 13, and an enlarged foundation 13A is set on the ground of the platform steel pipe pile 13 at the front end; a winch steel pipe pile 14 is driven on the rear side (landward side) of a row of platform steel pipe piles 13 corresponding to each slideway platform beam 12, and the top elevation of the winch steel pipe pile 14 is the same as the top elevation of the platform steel pipe pile 13.

[0028] The water slide is composed of several water slide beams 2, which are fixed on a mortar-laid rubble slope protection surface 2A with a slope of 1:1.5 and connected to the front ends (seaward ends) of several slide platform beams 12 one by one; each water slide beam 2 is a rectangular reinforced concrete beam with a cross-sectional size of 600mm×800mm; a foot steel pipe pile 20 is driven at the foot of each water slide beam 2; an I-beam 21 is embedded on both sides of the top surface of each water slide beam 2; a 10mm thick beam top steel plate 22 (see FIG. 2 ) welded to the top surfaces of the upper wing plates of the two I-beams 21 is laid on the top surface of each water slide beam 2. Figure 2a ), the surface of the beam top steel plate 22 is coated with butter for protection; a gentle slope is provided between the top of each water slide beam 2 and the front end of the corresponding slide platform beam 12;

[0029] Several driving mechanisms are installed one by one between several winch steel pipe piles 14 and several slide platform beams 12; each driving mechanism includes a winch 3 installed on the winch steel pipe pile 14, a rear fixed pulley 31 installed between two H-shaped steels in the front part of the slide platform beam 12, and a front fixed pulley 32 installed between two H-shaped steels at the front end of the slide platform beam 12.

[0030] The method for splicing and entering water of a long and large pipe of the present invention comprises the following steps:

[0031] Step 1: arranging the assembly welding station, anti-corrosion station and launching station in sequence from the back to the front on the pipeline splicing platform, and marking the assembly welding station, anti-corrosion station and shipping station with paint on each platform beam 11 and slideway platform beam 12 of the pipeline splicing platform;

[0032] Step 2: Use crawler crane to hoist twelve 20m long pipe sections and place them on the assembly and welding station of the pipeline splicing platform. Manually cooperate with crawler crane to complete the alignment of adjacent pipe sections and assemble them into a 240m long pipeline segment 10. Then, triangular wooden wedges 4 are inserted on both sides of the bottom of the pipe section located on the assembly and welding station to prevent the pipe section from moving. Then, the splicing circumferential seam welding between two adjacent pipe sections is carried out, and the weld is inspected. Then, several hooks 1A corresponding to several slideway platform beams 12 are welded on the same busbar on the outer surface of the pipeline segment 10 (see Figure 3 );

[0033] Step three, first, the ends of the steel wire ropes 30 on the several winches 3 are respectively passed downward around the corresponding rear fixed pulleys 31, and then hung on the hooks 1A of the several pipeline segments 10 one by one, then the triangular wooden wedges 4 placed on the assembly welding station are removed, and then the several winches 3 are synchronously started through the same control cabinet, and the steel wire ropes 30 on the several winches 3 pull the pipeline segment 10 forward to the anti-corrosion station, and then the triangular wooden wedges 4 are respectively plugged on both sides of the bottom of the pipeline segment 10 located at the anti-corrosion station to prevent the pipeline segment 10 from moving, and the pipeline joint is treated for anti-corrosion, and finally, the socket flanges are respectively welded at both ends of the pipeline segment 10, and the two ends of the pipeline segment 10 are sealed with flange blind plates, and the traction rope is tied to the flange blind plates (see Figure 4 );

[0034] Step 4: First, the ends of the steel wire ropes 30 on the several winches 3 are respectively passed downward around the corresponding rear fixed pulleys 31 and front fixed pulleys 32, and then hung on the hooks of the several pipeline segments 10 one by one. Then, the triangular wooden wedges 4 placed on the anti-corrosion station are removed, and then the several winches 3 are synchronously started through the same control cabinet. The steel wire ropes 30 on the several winches 3 pull the pipeline segment 10 forward to the launching station, and then the triangular wooden wedges 4 are respectively plugged on both sides of the bottom of the pipeline segment 10 located at the launching station to prevent the pipeline segment 10 from moving, so that the pipeline segment 10 is on standby at the launching station (see Figure 5 );

[0035] Step 5, when the tide rises, first remove the triangular wooden wedge 4 placed on the launching station, then control the rotation speed of several winches 3 through the same control cabinet, and use the wire ropes 30 on several winches 3 to pull the pipeline segment 10 forward to the gentle slope between the launching slide and the pipeline splicing platform, and then slowly release the wire ropes 30 on several winches 3, so that the pipeline segment 10 can roll freely along the launching slide (several launching slide beams 2) to the water by relying on the center of gravity. The pipeline segment 10 with both ends blocked will naturally float up after being submerged in the water, and the pipeline segment 10 will roll downward (see Figure 6 ), the ends of the steel wire ropes 30 on the several winches 3 will naturally fall off the hook 1A, and finally the steel wire ropes 30 on the several winches 3 are retracted, and the pipeline segment 10 in the water is towed out by the anchoring boat pulling the towing rope.

[0036] Before the pipeline segment 10 is rolled into the water, the wire rope of the winch is stressed to ensure that the wire rope has a certain tension. When the pipeline segment 10 is rolled into the water, the pipeline segment 10 relies on the slope of the launching slide beam 2 and can be directly launched into the water without any external force.

[0037] The above embodiments are only used to illustrate the present invention, rather than to limit the present invention. Those skilled in the relevant technical field may make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should also belong to the scope of the present invention and should be defined by the claims.

Claims

1. A method for splicing and launching long and large pipelines, which uses a pipeline splicing platform built on the coast and including a pipeline splicing platform with a length direction parallel to the coastline, a launching slide, and several driving mechanisms; in, The pipeline splicing platform comprises a plurality of platform beams arranged perpendicularly to the coastline at intervals; two platform beams correspondingly located at both ends of the pipeline splicing platform and a plurality of platform beams arranged at intervals in the middle of the pipeline splicing platform are slideway platform beams; each platform beam adopts a single H-shaped steel; each slideway platform beam adopts two H-shaped steels arranged at intervals; each platform beam and each slideway platform beam are respectively supported by a row of platform steel pipe piles, and a winch steel pipe pile is respectively driven on the rear side of a row of platform steel pipe piles corresponding to each slideway platform beam, and the top elevation of the winch steel pipe pile is the same as the top elevation of the platform steel pipe pile; The water slide is composed of a plurality of water slide beams fixed on the mortar-laid slab stone slope protection surface and connected one by one to the front ends of a plurality of slide platform beams; each water slide beam is a reinforced concrete beam with a rectangular cross section, and a gentle slope is provided between the top end of each water slide beam and the front end of the corresponding slide platform beam; Several driving mechanisms are installed one by one between several winch steel pipe piles and several slideway platform beams; each driving mechanism includes a winch installed on the winch steel pipe pile, a rear fixed pulley installed between two H-shaped steels at the front of the slideway platform beam, and a front fixed pulley installed between two H-shaped steels at the front end of the slideway platform beam; The method for splicing and putting into water the long and large pipes comprises the following steps: Step 1: Set up the assembly welding station, anti-corrosion station and launching station in sequence from the back to the front on the pipeline splicing platform, and mark the assembly welding station, anti-corrosion station and shipping station with paint on each platform beam and slideway platform beam of the pipeline splicing platform; Step 2: Use a crawler crane to hoist multiple pipe sections and place them on the assembly and welding station of the pipeline splicing platform. Manually cooperate with the crawler crane to complete the alignment of adjacent pipe sections and assemble them into a pipeline segment with a length of L. Then, triangular wooden wedges are inserted on both sides of the bottom of the pipe section located on the assembly and welding station, and then the splicing circumferential seam welding between two adjacent pipe sections is performed, and the weld is inspected. Then, several hooks corresponding to several slide platform beams are welded on the same busbar on the outer surface of the pipeline segment. Step three, first, the ends of the steel wire ropes on several winches are respectively passed downward around the corresponding rear fixed pulleys, and then hung on the hooks of several pipeline segments one by one, then the triangular wooden wedges placed on the assembly and welding station are removed, and then several winches are synchronously started through the same control cabinet, and the steel wire ropes on several winches pull the pipeline segment forward to the anti-corrosion station, and then triangular wooden wedges are respectively plugged on both sides of the bottom of the pipeline segment located at the anti-corrosion station, and the pipeline joints are treated with anti-corrosion, and finally, socket flanges are respectively welded at both ends of the pipeline segment, and the two ends of the pipeline segment are sealed with flange blind plates, and the traction rope is tied to the flange blind plates at the same time; Step 4: First, the ends of the steel wire ropes on several winches are respectively passed downward around the corresponding rear fixed pulley and front fixed pulley in turn, and then hung on the hooks of several pipeline segments one by one. Then, the triangular wooden wedges placed on the anti-corrosion station are removed, and then several winches are synchronously started through the same control cabinet. The steel wire ropes on several winches pull the pipeline segment forward to the launching station, and then triangular wooden wedges are respectively inserted on both sides of the bottom of the pipeline segment located at the launching station, so that the pipeline segment is on standby at the launching station; Step five, wait until high tide, first remove the triangular wooden wedges placed on the launching station, then control the rotation speed of several winches through the same control cabinet, and use the steel wire ropes on several winches to pull the pipeline segment forward to the gentle slope between the launching slide and the pipeline splicing platform, then slowly release the steel wire ropes on several winches, so that the pipeline segment can roll freely along the launching slide to the water by relying on the center of gravity, and the pipeline segment with both ends blocked will naturally float up after being submerged in the water. As the pipeline segment rolls downward, the ends of the steel wire ropes on several winches will naturally fall off the hooks, and finally the steel wire ropes on several winches are retracted, and the pipeline segment in the water is towed out by the anchor boat.

2. The method for splicing and entering water of a long and large pipe according to claim 1, It is characterized in that There are three platform steel pipe piles in each row, and a square pile top capping steel plate is fixed on the top surface of each platform steel pipe pile.

3. The method for splicing and entering water of a long and large pipe according to claim 1, It is characterized in that An I-beam is embedded in the interior of each of the water slide beams on both sides of the top surface; a beam top steel plate welded to the top surfaces of the upper wing plates of the two I-beams is laid on the top surface of each water slide beam; a trolley limiting mechanism is also provided on each water slide beam, and the trolley limiting mechanism includes two lateral limiting plates welded to the two side surfaces of the beam top steel plate in a one-to-one correspondence, two blocking plates symmetrically welded to the exposed surfaces of the I-beams on both sides near the top of the water slide beam, and a blocking round steel inserted into a circular hole opened in the middle of the two blocking plates.

4. The method for splicing and entering water of a long and large pipe according to claim 1 or 3, It is characterized in that A slope foot steel pipe pile is respectively driven at the slope foot of each of the launching slideway beams.

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