A method of launching a pipe section forming a marine outfall pipe

Abstract

The application discloses a launching method of pipeline segments of a sea outfall pipe, which comprises the following steps: step one, placing mobile saddles and pipeline supports on an assembling station of a pipeline assembling platform; step two, hoisting multiple pipeline segments to the assembling station to assemble pipeline segments; step three, moving the multiple mobile saddles together with the pipeline segments to a welding station by multiple pushing devices to perform welding; step four, after the pipeline segments are welded, moving the multiple mobile saddles together with the pipeline segments to a corrosion prevention station by the multiple pushing devices to perform corrosion prevention treatment; and step five, moving the multiple mobile saddles to the launching trolleys on the top of the launching slide beams by the multiple pushing devices, then controlling multiple winches to lower the mobile saddles on the launching trolleys, and the pipeline segments with both ends blocked float up naturally after being immersed in water, and finally the multiple launching trolleys are pulled to the top of the launching slide beams by the multiple winches and fixed. The application enables the pipeline to be launched stably.

Description

TECHNICAL FIELD

[0001] The present application relates to a method for launching a pipeline section of a marine outfall pipe. BACKGROUND

[0002] The marine outfall is a kind of sewage discharge form in which the outlet of the sewage discharge is arranged in the gulf and discharged into the seawater. The marine outfall pipe is connected by the rear section and the sea section. The sea section of the marine outfall pipe is generally composed of a discharge pipe and a discharge head. The discharge head is a diffusion pipe and should be far away from the coast. A plurality of discharge riser pipes are vertically connected to the discharge head to ensure that the sewage is mixed and diluted with seawater as soon as possible. When the sea section of the marine outfall pipe is laid, the length of the marine outfall pipe is large, so the pipeline section is assembled in multiple sections, that is, the pipe section manufactured in the steel pipe manufacturing plant is transported to the coast of the launching area for lengthening to form each pipeline section, each pipeline section is launched by rolling, then each pipeline section is transported to the specified area by floating and towing, and finally each pipeline section is assembled underwater to form the marine outfall pipe. If the pipeline is not launched smoothly due to unfavorable measures, the pipeline or the pipeline anticorrosion layer may be damaged. SUMMARY

[0003] The present application aims to overcome the defects of the prior art and provide a method for launching a pipeline section of a marine outfall pipe, which can not only launch the pipeline section smoothly, but also form a pipeline splicing and launching line, thereby reducing the pipeline precast site area and construction cost and protecting the quality of the finished pipeline.

[0004] The present application is achieved by a method for launching a pipeline section of a marine outfall pipe, which uses a pipeline splicing and launching device built on the coast. The device includes a pipeline splicing platform with a length parallel to the coastline, a plurality of launching slide beams, a plurality of moving saddles, a plurality of pushing devices, a plurality of sliding trolleys, and a plurality of trolley driving mechanisms, wherein,

[0005] The pipeline splicing platform includes a plurality of platform beams vertically arranged at intervals with the coastline. Two platform beams at the two ends of the pipeline splicing platform and a plurality of platform beams at the middle of the pipeline splicing platform are slide platform beams. Each platform beam is a single H-shaped steel. Each slide platform beam is two H-shaped steels arranged at intervals. Each platform beam and each slide platform beam is supported by a row of platform steel pipe piles. The back side of each row of platform steel pipe piles corresponding to each slide platform beam is provided with a winch steel pipe pile. The top elevation of the winch steel pipe pile is the same as that of the platform steel pipe pile.

[0006] The several downslide slide beams are fixed on the mortar paving stone protection slope surface and are connected with the front ends of the several slide platform beams one by one; each downslide slide beam is a reinforced concrete beam with a rectangular cross section;

[0007] The several mobile saddles are arranged on the several slide platform beams one by one;

[0008] The several pushing devices are arranged on the several slide platform beams one by one; each pushing device comprises a pushing seat clamped on the slide platform beam and a jack with a rear end surface abutting against a front end surface of the pushing seat;

[0009] The several downslide trolleys are arranged on the several downslide slide beams one by one, each downslide trolley is a right-angled triangle with a hypotenuse as a base, the slope of the base of each downslide trolley is the same as the slope of the downslide slide beam, and a downslide Teflon plate is laid on the base of each downslide trolley;

[0010] The several trolley driving mechanisms are installed between the several winch steel pipe piles and the several downslide trolleys one by one, each trolley driving mechanism comprises a winch installed on the winch steel pipe pile, a lower fixed pulley installed between the middle front bottom surfaces of the lower flanges of the two H-shaped steels of the slide platform beam, an upper fixed pulley installed between the front end top surfaces of the lower flanges of the two H-shaped steels of the slide platform beam and a trolley lug plate installed on the upper corner of the downslide trolley, so that the end of the steel wire rope on the winch is first wound downwardly through the lower fixed pulley, then upwardly through the upper fixed pulley and finally fixed on the trolley lug plate;

[0011] The downslide method for forming the pipeline section of the outfall pipeline of the application comprises the following steps:

[0012] Step one, the assembling station, the welding station and the anticorrosion station are arranged on the pipeline splicing platform from back to front in sequence and at intervals, the transport station is arranged on the top of the downslide slide beam, and the assembling station, the welding station and the anticorrosion station are marked with paint on each platform beam of the pipeline splicing platform and the slide platform beam; the steel pipeline support is placed on the assembling station of each platform beam, and the mobile saddle is placed on the assembling station of each slide platform beam;

[0013] Step two, the crawler crane is used to hoist and place multiple pipeline sections on the mobile saddles on the assembling stations of the several slide platform beams and the pipeline supports on the assembling stations of the platform beams, the alignment of the adjacent pipeline sections is completed by manual operation in cooperation with the crawler crane, the fixed plate for preventing the movement of the two pipeline sections is welded, the pipeline section is assembled, and then the flange blind plate is used to block the two ends of the pipeline section;

[0014] Step three, the pushing seat of the pushing device is clamped at the upper flange of the two H-shaped steel of the slide platform beam, and the corresponding jack is placed, and the front end surface of the jack is abutted against the rear end surface of the corresponding moving saddle. The jacks of several pushing devices are controlled through an operation cabinet; the operation cabinet of the jack is started, and the several jacks are synchronously pushed out, so that the several moving saddles and the pipeline segment are moved forward to one pushing stroke of the jack, then the several jacks are retracted, and the several pushing seats are moved forward to the same axis position. The pushing of the several moving saddles is repeated to move the pipeline segment forward to the welding station for welding;

[0015] Step four, after the pipeline segment is welded and detected on the welding station, the moving saddle is repeatedly pushed to the anticorrosion station for anticorrosion treatment of the joint on the pipeline segment;

[0016] Step five, the several moving saddles on the anticorrosion station are synchronously moved forward to the delivery station through the several pushing devices, that is, the moving saddles are pushed to the slide trolley located at the top of the launching slide beam, and then the rotating speeds of the winches one by one corresponding to the several platform slide beams are controlled through the same control cabinet, so that the several slide trolleys are synchronously lowered along the several launching slide beams one by one corresponding to the several slide trolleys, that is, the moving saddles located on the slide trolleys are lowered, and the pipeline segment with both ends blocked is naturally floated after being immersed in water, and finally the several slide trolleys are pulled to the top of the launching slide beam one by one corresponding to the several winches.

[0017] The launching method of the pipeline segment of the sea outfall pipe, wherein the number of the platform steel pipe piles in each row is three, and a square pile top head steel plate is fixed on the top surface of each platform steel pipe pile.

[0018] The launching method of the pipeline segment of the sea outfall pipe, wherein the inside of each launching slide beam is pre-buried with an I-shaped steel on both sides of the top surface; a beam top steel plate is arranged on the top surface of each launching slide beam and welded with the top surfaces of the upper flanges of the two I-shaped steels; a trolley limiting mechanism is further arranged on each launching slide beam, the trolley limiting mechanism comprises two side limiting plates welded on the two side surfaces of the beam top steel plate one by one, two blocking plates symmetrically welded on the exposed surfaces of the I-shaped steels near the top of the launching slide beam, and a blocking round steel inserted into the round holes in the middle portions of the two blocking plates; when the slide trolley is located at the top of the launching slide beam, a limiting round steel is inserted into the round holes of the two limiting steel plates to prevent the slide trolley from sliding down; and the limiting round steel is extracted when the slide trolley needs to slide down or rise.

[0019] The launching method of the pipeline segment of the sea outfall pipe, wherein a slope steel pipe pile is arranged at the slope foot of each launching slide beam.

[0020] The launching method of the pipeline section of the sea outfall pipe, wherein the moving saddle comprises a rectangular bottom plate, a pair of right-angled triangle support plates symmetrically fixed on the top surface of the bottom plate, a smooth Teflon plate fixed on the bottom surface of the bottom plate, and a rubber pad fixed on the inclined surface of the pair of support plates and the middle part of the top surface of the bottom plate.

[0021] The launching method of the pipeline section of the sea outfall pipe, wherein the pushing saddle comprises a pair of horizontal steel plates, a pair of vertical steel plates and a pair of vertical support plates; the pair of horizontal steel plates are respectively arranged on the lower part of the outer side of the upper flange of the two H-shaped steels of the launching platform beam; the pair of vertical steel plates are respectively connected on the bottom surface of the pair of horizontal steel plates through the outwardly extended lower hook plates; the pair of vertical support plates are respectively fixed on the middle part of the front end surface of the pair of vertical steel plates; the rear end surface of the jack abuts against the front end surface of the pair of vertical steel plates of the pushing saddle.

[0022] The launching method of the pipeline section of the sea outfall pipe has the following characteristics: the functions of pipeline splicing and launching are integrated, the steel pipe pile is used as the bearing pile of the pipeline splicing platform, the launching slide beam is supported by the mortar piece stone slope surface, and the reinforced concrete launching slide beam is used, which has strong strength, rigidity and stability, and also has the anti-overturning stability, wind resistance and anti-skid safety, etc., which not only facilitates the splicing of the pipeline section, but also enables the pipeline section to be launched stably, and can form the pipeline splicing and launching assembly line operation, which not only reduces the pipeline precast site occupation and construction cost, but also protects the finished product quality of the pipeline. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is the plan view of the splicing platform in the splicing and launching device of the sea outfall pipe of the present application;

[0024] Figure 2 is the transverse sectional view of the splicing and launching device of the sea outfall pipe of the present application;

[0025] Figure 3 is the side view of the moving saddle in the splicing and launching device of the sea outfall pipe of the present application;

[0026] Figure 4a is the side view of the pushing device in the splicing and launching device of the sea outfall pipe of the present application;

[0027] Figure 4b is the left side view of Figure 4a ;

[0028] Figure 5 is the side view of the lower sliding trolley in the splicing and launching device of the sea outfall pipe of the present application;

[0029] Figure 6is a side view of the limiting mechanism of the sliding trolley in the splicing and launching device of the marine outfall pipe. DETAILED DESCRIPTION

[0030] The application will be further described below with reference to the accompanying drawings.

[0031] Referring to Figures 1 to 6 The launching method of the application is a launching method of pipe segments forming a marine outfall pipe, which is built on the coast and comprises a pipe splicing platform parallel to the coastline, a plurality of launching ramp beams 2, a plurality of moving saddles 3, a plurality of pushing devices, a plurality of sliding trolleys 5 and a plurality of trolley driving mechanisms.

[0032] The pipe splicing platform has a height of 1-2 m and comprises a plurality of platform beams 11 spaced by about 18 m and arranged perpendicularly to the coastline; two platform beams located at the two ends of the pipe splicing platform and a plurality of platform beams located at the middle part of the pipe splicing platform as ramp platform beams 12 (see Figure 1 Each platform beam 11 is made of a single H200×200×8×12 steel; each ramp platform beam 12 is made of two H340×250×9×14 steels spaced apart; each platform beam 11 and each ramp platform beam 12 is 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 630 mm and spaced apart, the distance between the three platform steel pipe piles 13 is 4 m and 5 m, and each platform steel pipe pile 13 has a square pile top head steel plate 130 with a size of 750 mm×750 mm fixed thereon, and the platform steel pipe pile 13 located at the front end has an enlarged foundation 13A arranged on the ground; the rear side (landward side) of the row of platform steel pipe piles 13 corresponding to each ramp platform beam 12 has a winch steel pipe pile 14 arranged thereon, and the top elevation of the winch steel pipe pile 14 is the same as that of the platform steel pipe pile 13.

[0033] The several underwater slide beams 2 are fixed on the mortar rubble slope surface 2A with a slope of 1:1.5 and are correspondingly connected with the front ends (the sea-facing ends) of the several slide platform beams 12; each underwater slide beam 2 is a rectangular reinforced concrete beam with a cross-sectional dimension of 600mm×800mm; a slope steel pipe pile 20 is respectively arranged at the slope foot of each underwater slide beam 2; the inside of each underwater slide beam 2 is respectively pre-buried with a I-beam on both sides of the top surface; a 10mm-thick beam top steel plate is arranged on the top surface of each underwater slide beam 2 and is welded with the top surfaces of the upper flanges of the two I-beams, the surface of the beam top steel plate is coated with butter for protection; a trolley limiting mechanism is further arranged on each underwater slide beam 2, the trolley limiting mechanism comprises two 30mm-high lateral limiting plates 21 which are correspondingly welded on the two side surfaces of the beam top steel plate, two blocking plates 22 which are symmetrically welded on the exposed surfaces of the I-beams on both sides of the near-top portion of the underwater slide beam 2, and a blocking round steel 23 which is inserted into the circular hole in the middle portion of the two blocking plates 22.

[0034] The several mobile saddles 3 are correspondingly arranged on the several slide platform beams 12; each mobile saddle 3 is welded by steel plates and has a size of 1850mm in length, 50mm in width and 420mm in height, each mobile saddle 3 comprises a rectangular bottom plate 31 with a thickness of 50mm, a pair of right-angled triangular support plates 32 which are symmetrically fixed on the inner and outer top surfaces of the bottom plate 31, a translational Teflon plate 33 with a thickness of 20mm which is fixed on the bottom surface of the bottom plate 31, and a rubber pad 34 with a thickness of 20mm which is fixed on the inclined surfaces of the pair of support plates 32 and the middle portion of the top surface of the bottom plate 31 (see Figure 3 ).

[0035] The several pushing devices are correspondingly arranged on the several slide platform beams 12; each pushing device comprises a pushing seat 4 and a jack 40; the pushing seat 4 is welded by steel plates with a thickness of 20mm and comprises a pair of horizontal steel plates 41, a pair of vertical steel plates 42 and a pair of vertical support plates 43; wherein the pair of horizontal steel plates 41 are correspondingly arranged on the lower parts of the outer sides of the upper flanges of the two H-shaped steels of the slide platform beam 12; the pair of vertical steel plates 42 are correspondingly connected on the bottom surfaces of the pair of horizontal steel plates 41 through the lower hook plates which are outwardly extended from the outer side portions; the pair of vertical support plates 43 are correspondingly fixed on the middle portions of the rear end surfaces of the pair of vertical steel plates 42; the rear end surface of the jack 40 abuts against the front end surface of the pair of vertical steel plates 42 of the pushing seat 4 (see Figure 4a and Figure 4b ).

[0036] Several sliding trolleys 5 are positioned one-to-one on several slide beams 12. Each sliding trolley 5 is a right-angled triangle with its hypotenuse as the base. The dimensions of each sliding trolley 5 are 2100mm long × 700mm wide × 1180mm high. It is welded from No. 36 channel steel and 30mm thick steel plates. The slope of the base of each sliding trolley 5 is the same as the slope of the slide beam 12, and a sliding PTFE plate 50 is laid on the bottom surface of each sliding trolley 5 (see...). Figure 5 ).

[0037] Several trolley drive mechanisms are installed one-to-one between several winch steel pipe piles 14 and several sliding trolleys 5. Each trolley drive mechanism includes a winch 60 installed on the winch steel pipe pile 14, a lower fixed pulley 61 installed between the middle front bottom surfaces of the lower flanges of the two H-beams of the slide platform beam 12, an upper fixed pulley 62 installed between the front top surfaces of the lower flanges of the two H-beams of the slide platform beam 12, and a trolley ear plate 63 installed at the upper corner of the sliding trolley 5, so that the end of the wire rope on the winch 60 first passes downwards over the lower fixed pulley 61 and then upwards over the upper fixed pulley 62 before being fixed on the trolley ear plate 63.

[0038] The method for discharging pipe segments forming a submersible discharge pipe according to the present invention includes the following steps:

[0039] Step 1: On the pipeline splicing platform, the assembly station, welding station, and anti-corrosion station are set up sequentially from back to front at intervals. The transport station is set up on the top of the drainage slide beam 2. The assembly station, welding station, and anti-corrosion station are marked with paint on each platform beam 11 and slide platform beam 12 of the pipeline splicing platform. Steel pipe supports are placed on the assembly station of each platform beam 11, and mobile saddles 3 are placed on the assembly station of each slide platform beam 12. Sliding trolleys 5 are placed on the top of each drainage slide beam 2. The wire ropes on several winches 60 are connected one by one to the trolley ear plates 62 on several sliding trolleys 5. A blocking round steel bar 23 is inserted into the round holes of the two blocking plates 22 on the drainage slide beam 2 to prevent the sliding trolleys 5 from sliding down.

[0040] Step 2: Using a crawler crane, multiple 20m long pipe sections are hoisted and placed on the movable saddle 3 located at the assembly position of several sliding platform beams 12 and the pipe support at the assembly position of platform beams 12. The top elevation of the pipe support matches the top elevation of the movable saddle 3 to ensure that the pipe is level. The adjacent pipe sections are aligned by manual labor in conjunction with the crawler crane, and fixing plates are welded to prevent the two pipe sections from moving. The sections are then assembled into a 240m (or 120m in the shallow section) long pipe section 10. Finally, flange blind plates are used to seal both ends of the pipe section 10.

[0041] Step three, the pushing seat 4 of the pushing device is clamped at the upper flange of the two H-shaped steel of the slide platform beam 12, and the corresponding jack 40 is placed, and the front end surface of the jack 40 is abutted against the rear end surface of the corresponding moving saddle 3. The pushing seat 4 is placed according to the mark line on the assembling station, considering the length of the jack 40 itself and the pushing length, and ensuring that the pushing seats 4 of the several pushing devices are on the same axis and perpendicular to the axis of the moving saddle 3. The jacks 40 of the several pushing devices are controlled through an operation cabinet. The operation cabinet of the jack is started to synchronously push the several jacks 40, and the several moving saddles 3 together with the pipe sections 10 are moved forward to one pushing stroke (800mm-1000mm) of the jack, and then the several jacks 40 are retracted, and the several pushing seats 4 are moved forward to the same axial position. The moving saddles 3 are repeatedly controlled to push the pipe sections 10 to the welding station for welding.

[0042] Step four, after the pipe sections 10 are welded and detected on the welding station, the moving saddles 3 are repeatedly pushed to the anticorrosion station for anticorrosion treatment of the joints on the pipe sections 10.

[0043] Step five, the several moving saddles 3 on the anticorrosion station are synchronously moved forward to the delivery station by the several pushing devices, that is, the moving saddles 3 (pipe sections) are pushed to the lower sliding trolley 5 located at the top of the launching slide beam 2, the blocking round steel 23 in front of the lower sliding trolley 5 is pulled out, and then the rotating speeds of the winches 60 installed on the steel pipe piles 14 corresponding to the several platform slide beams 12 are controlled through the same control cabinet, so that the several lower sliding trolleys 5 are synchronously lowered along the several launching slide beams 2 one by one, that is, the moving saddles 3 on the lower sliding trolleys 5 are lowered, and the pipe sections 10 are lowered into the water. The pipe sections 10 with both ends blocked float up naturally after being lowered into the water, and then the several lower sliding trolleys 5 are pulled to the top of the launching slide beam 2 through the several winches 60 one by one. Finally, a blocking round steel 23 is inserted into the round hole of the two blocking plates 22 on each launching slide beam 2, so that the lower sliding trolley 5 is fixed on the delivery station at the top of the launching slide beam 2.

[0044] The smooth Teflon plate 33 (friction coefficient is 0.04) at the bottom of the moving saddle 3 greatly reduces the frictional force when the moving saddle 3 moves, and the frictional force is converted into a bending moment on the upper flange of the H-shaped steel (slide platform beam 12) through the pushing seat 4 to eliminate the bending moment.

[0045] The lateral limiting plates 21 on both sides of the top of the launching ramp beam 2 can prevent the launching trolley 5 from sliding out of the launching ramp beam 2; since the slope of the bottom surface of the launching trolley 5 is the same as the slope of the launching ramp beam 2, and the bottom surface of the launching trolley 5 is paved with the launching teflon plate 50, the moving saddle 3 on the launching trolley 5 is always in a horizontal state, so that the pipeline segment 10 on the moving saddle 3 can be smoothly lowered into the water.

[0046] Three to four moving saddles 3 can be arranged on each launching ramp platform beam 12 to realize the pipeline splicing and launching in a continuous operation.

[0047] The above embodiments are only used for illustrating the present application, but not for limiting the present application. Those skilled in the art can make various changes or modifications without departing from the spirit and scope of the present application. Therefore, all equivalent technical solutions should belong to the scope of the present application, which is defined by the claims.

Claims

1. A method for launching a pipe section of a marine outfall pipe, using a pipe splicing and launching device built on a shore, the device comprising a pipe splicing platform with a length parallel to the shoreline, a plurality of launching slide beams, a plurality of movable saddles, a plurality of pushing devices, a plurality of slide-down trolleys and a plurality of trolley driving mechanisms, wherein the pipe splicing platform comprises a plurality of platform beams arranged vertically to the shoreline at intervals, two of the platform beams at each end of the pipe splicing platform and a plurality of the platform beams at the middle of the pipe splicing platform are slide beam platform beams, each platform beam is a single H-shaped steel, each slide beam platform beam is two H-shaped steels arranged at intervals, each platform beam and each slide beam platform beam is supported by a row of platform steel pipe piles, and a winch steel pipe pile is arranged at the back side of each row of platform steel pipe piles corresponding to each slide beam platform beam, the top elevation of the winch steel pipe pile is the same as that of the platform steel pipe pile; the plurality of launching slide beams are fixed on the mortar rubble slope surface and connected to the front ends of the plurality of slide beam platform beams one by one; each launching slide beam is a reinforced concrete beam with a rectangular cross section; the plurality of movable saddles are arranged on the plurality of slide beam platform beams one by one; the plurality of pushing devices are arranged on the plurality of slide beam platform beams one by one; each pushing device comprises a pushing seat clamped on the slide beam platform beam and a jack with the rear end surface abutting against the front end surface of the pushing seat; the plurality of slide-down trolleys are arranged on the plurality of launching slide beams one by one, each slide-down trolley is a right-angled triangle with the hypotenuse as the base, the slope of the base of each slide-down trolley is the same as the slope of the launching slide beam, and a slide-down Teflon plate is laid on the base of each slide-down trolley; the plurality of trolley driving mechanisms are installed between the plurality of winch steel pipe piles and the plurality of slide-down trolleys one by one, each trolley driving mechanism comprises a winch installed on the winch steel pipe pile, a lower fixed pulley installed between the middle front bottom surfaces of the lower flanges of the two H-shaped steels of the slide beam platform beam, an upper fixed pulley installed between the front end top surfaces of the lower flanges of the two H-shaped steels of the slide beam platform beam and a trolley ear plate installed on the upper corner of the slide-down trolley, so that the end of the steel wire rope on the winch is first wound downward through the lower fixed pulley, then upward through the upper fixed pulley and finally fixed on the trolley ear plate; characterized in that the launching method comprises the following steps: step one, arranging splicing stations, welding stations and corrosion prevention stations on the pipe splicing platform at intervals from back to front, arranging an operation station on the top of the launching slide beam and marking the splicing stations, welding stations and corrosion prevention stations on each platform beam and slide beam platform beam of the pipe splicing platform with paint; placing a steel pipe support on each platform beam splicing station and a movable saddle on each slide beam platform beam splicing station; step two, using a crawler crane to hoist and place multiple pipe sections on the movable saddles on the splicing stations of the plurality of slide beam platform beams and the pipe supports on the splicing stations of the platform beams, manually aligning adjacent pipe sections with the help of the crawler crane, welding a fixed plate to prevent the movement of the two pipe sections, splicing the pipe sections into a pipe section and then sealing the two ends of the pipe section with flange blind plates. ​ ​ ​ ​ ​ ​ ​ ​ ​ Step three, the pushing seat of the pushing device is clamped at the upper flange of the two H-shaped steels of the slide platform beam, and the corresponding jack is placed so that the front end surface of the jack abuts against the rear end surface of the corresponding moving saddle, and the jacks of several pushing devices are controlled through an operation cabinet; the operation cabinet of the jack is started to synchronously push out the several jacks, the several moving saddles and the pipe segments are moved forward to one pushing stroke of the jack, then the several jacks are retracted, and the several pushing seats are moved forward to the same axis position, and the pushing of the several moving saddles is repeated to move the pipe segments forward to the welding station for welding; Step four, after the pipe segments are welded and detected on the welding station, the moving saddles are repeatedly pushed to the anticorrosion station for anticorrosion treatment of the joints on the pipe segments; Step five, the several moving saddles on the anticorrosion station are synchronously moved forward to the delivery station through the several pushing devices, i.e. the moving saddles are pushed to the slide trolley on the top of the launching slide beam, then the rotating speeds of the winches installed on the several platform slide beams on the rear side of the several platform slide beams are controlled through the same control cabinet, and the several slide trolleys are synchronously lowered along the several launching slide beams, i.e. the moving saddles on the slide trolleys are lowered, and the pipe segments with both ends blocked float up naturally after being immersed in water, and finally the several slide trolleys are pulled to the top of the launching slide beam through the several winches.

2. The method of launching a pipe section forming an outfall pipe according to claim 1, characterized in that, The number of the platform steel pipe piles in each row is three, and a square pile top head steel plate is fixed on the top surface of each platform steel pipe pile.

3. The method of launching of pipe sections forming a discharge pipe according to claim 1, characterized in that, The inside of each launching slide beam is pre-buried with an I-shaped steel on both sides of the top surface; a beam top steel plate is laid on the top surface of each launching slide beam and welded with the top surfaces of the upper flanges of the two I-shaped steels; a trolley limiting mechanism is further arranged on each launching slide beam, which comprises two side limiting plates welded on the two side surfaces of the beam top steel plate, two blocking plates symmetrically welded on the exposed surfaces of the I-shaped steels near the top of the launching slide beam, and a blocking round steel inserted into the circular holes in the middle of the two blocking plates; when the slide trolley is located on the top of the launching slide beam, a limiting round steel is inserted into the circular holes of the two limiting steel plates to prevent the slide trolley from sliding down; when the slide trolley needs to slide down or rise, the limiting round steel is extracted.

4. A method of launching a pipe section forming a discharge pipe according to claim 1 or 3, characterized in that, A slope steel pipe pile is arranged at the slope foot of each launching slide beam.

5. The method of launching a pipe section forming an outfall pipe according to claim 1, wherein, The moving saddle comprises a rectangular bottom plate, a pair of symmetrically fixed right-angled triangular support plates on the inner and outer top surfaces of the bottom plate, a smooth Teflon plate fixed on the bottom surface of the bottom plate, and a rubber pad fixed on the inclined surfaces of the pair of support plates and the middle part of the top surface of the bottom plate.

6. The method of launching of pipe sections forming a discharge pipe according to claim 1, characterized in that, The pushing seat comprises a pair of horizontal steel plates, a pair of vertical steel plates and a pair of vertical support plates; the pair of horizontal steel plates are correspondingly arranged at the lower parts of the outer sides of the upper flanges of the two H-shaped steels of the slide platform beam; the pair of vertical steel plates are correspondingly connected to the bottom surfaces of the pair of horizontal steel plates through the lower hook plates extended outwards; the pair of vertical support plates are correspondingly fixed to the middle parts of the rear end surfaces of the pair of vertical steel plates; and the rear end surfaces of the jacks are abutted against the front end surfaces of the pair of vertical steel plates of the pushing seat.

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