CN108625457B - Pipeline construction method for sewage deep sea discharge engineering - Google Patents
Pipeline construction method for sewage deep sea discharge engineering Download PDFInfo
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- CN108625457B CN108625457B CN201810633585.9A CN201810633585A CN108625457B CN 108625457 B CN108625457 B CN 108625457B CN 201810633585 A CN201810633585 A CN 201810633585A CN 108625457 B CN108625457 B CN 108625457B
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- 239000010865 sewage Substances 0.000 title claims abstract description 29
- 238000010276 construction Methods 0.000 title claims abstract description 21
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 32
- 239000010959 steel Substances 0.000 claims abstract description 32
- 239000007788 liquid Substances 0.000 claims abstract description 23
- 238000012545 processing Methods 0.000 claims abstract description 4
- 238000007789 sealing Methods 0.000 claims description 50
- 239000002184 metal Substances 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 18
- 239000000843 powder Substances 0.000 claims description 18
- 238000009434 installation Methods 0.000 claims description 11
- 230000001681 protective effect Effects 0.000 claims description 9
- 230000001154 acute effect Effects 0.000 claims description 6
- 230000036346 tooth eruption Effects 0.000 claims description 6
- 230000032683 aging Effects 0.000 claims description 5
- 230000035882 stress Effects 0.000 description 4
- 230000013011 mating Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F3/00—Sewer pipe-line systems
- E03F3/06—Methods of, or installations for, laying sewer pipes
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- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
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- Water Supply & Treatment (AREA)
- Pipe Accessories (AREA)
Abstract
The invention belongs to the technical field of sewage pipeline construction, in particular to a pipeline construction method for sewage deep sea discharge engineering, which comprises the steps of firstly finishing the processing treatment of a steel pipe on the shore and installing a threaded flange at the end part of the steel pipe; then, the steel pipe is conveyed to a construction site; simultaneously, laying positioning piles on the seabed; then, hoisting the steel pipe to the positioning pile, and moving the steel pipe to align and contact the threaded flanges at the end parts of the adjacent steel pipes; then, connecting and fastening the two flanges by using bolts; and finally, fixing the steel pipe on the positioning pile. The invention utilizes the buoyancy of liquid in the sewage pipeline to realize the clamping of the thread part of the bolt; meanwhile, sundries in liquid in the pipeline can be crushed, and the pipeline is prevented from being blocked.
Description
Technical Field
The invention belongs to the technical field of sewage pipeline construction, and particularly relates to a pipeline construction method for sewage deep sea discharge engineering.
Background
The sewage discharging pipeline is an important component of urban sewage treatment engineering, and is developed from shallow sea to deep sea in order to improve the treatment capacity of coastal urban sewage, protect marine resources and environment, promote the sustainable development of marine economy and reduce the pollution of sewage to marine environment. The deep sea sewage pipeline is generally long in paving course and difficult in paving process. The success or failure of the engineering construction is determined by the selection of the paving process.
Flanges are parts of the interconnection between pipes for the connection between the ends of the pipes. The flanges are provided with holes, the two flanges are tightly connected by bolts, and the flanges are sealed by gaskets. The threaded flange is connected with a pipe with threads by screwing threads processed in an inner hole of the flange, welding is not needed, and therefore, the threaded flange has the characteristic of convenience in installation, and is suitable for thread locking and sealing of industrial and civil pipes such as fire fighting, gas, cold and hot water, air pressure pipes, oil pipes, hydraulic pipes and the like. When the threaded flange is used in water, due to the influence of external weather, when unbalanced force or exciting force is easily received, the two flanges rotate and deform under the action of stress moment, so that a gap between the two flanges is uneven, the sealing ring is leaked due to long-time uneven stress, meanwhile, sundries are easily accumulated in a sewage pipeline, the pipeline is blocked, and the maintenance cost is increased.
Disclosure of Invention
In order to make up the defects of the prior art, the invention provides the pipeline construction method for the sewage deep sea discharge engineering, the threaded part of the bolt is clamped by arranging the limiting unit and utilizing the buoyancy of liquid in the pipeline, so that poor sealing caused by deformation of the bolt due to unbalanced stress is effectively prevented, and the reliability of flange connection is improved; meanwhile, through the mutual matching work of the limiting unit and the cutting unit, sundries in liquid in the sewage pipeline are crushed, and the pipeline is prevented from being blocked.
The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a construction method of a sewage deep sea discharge engineering pipeline, which comprises the following steps:
the method comprises the following steps: finishing the processing treatment of the steel pipe on the shore, and mounting a threaded flange at the end part of the steel pipe;
step two: after the first step is finished, the steel pipe is conveyed to a construction site, and positioning piles are arranged on the seabed;
step three: after the positioning piles are arranged, hoisting the steel pipes to the positioning piles, and moving the steel pipes to enable the threaded flanges at the end parts of the adjacent steel pipes to be aligned and contacted;
step four: after the flanges of the adjacent steel pipes in the third step are aligned, connecting and fastening the two flanges by using bolts;
step five: in the fourth step, after the flange is fastened through bolts, the steel pipe is fixed on the positioning pile;
the threaded flange in the first step comprises a flange body, the flange body is formed by coaxially mounting an inner ring and an outer ring, a section of pipe thread is arranged at the left end of an inner hole of the flange body, a sealing surface of the right end surface of the flange body is a convex surface, and mounting holes are circumferentially arranged at positions, far away from the inner hole, of the flange body; a limiting unit is arranged in the mounting hole of the flange body and prevents the bolt from loosening and falling off by utilizing the buoyancy of liquid in the pipeline; a circular groove is formed in the right end face of the flange body and outside the mounting hole, and a first spring and a sealing ring are arranged in the circular groove of the flange body; one end of the sealing ring is arranged in the annular groove of the flange body through the first spring, the other end of the sealing ring extends out of the annular groove of the flange body, and after the two paired threaded flanges are connected through bolts to realize installation, the sealing ring is tightly pressed between the two threaded flanges, so that external liquid is prevented from directly contacting with a sealing ring on an inner sealing surface through a gap between the two flanges, and the aging of the sealing ring is slowed down; wherein,
the limiting unit comprises limiting teeth, a pin shaft, a shifting lever and a moving plate; the flange body is provided with a mounting groove at a position coaxial with the mounting hole, the inner wall of the flange body is circumferentially provided with a sliding groove along the radial direction, the position of the sliding groove corresponds to the position of the mounting groove, the sliding groove is positioned at one side of the mounting groove, and the sliding groove is communicated with the mounting groove; the limiting teeth are hinged in the mounting groove of the flange body through a pin shaft and used for clamping the threaded part of the bolt; one end of the deflector rod is fixed on the position of the limiting tooth deviating from the pin shaft; the movable plate is installed in the sliding groove of the flange body, the number of the movable plates is the same as that of the mounting grooves, through holes are horizontally formed in the positions, coaxial with the mounting holes, of the movable plate, the diameter of each through hole is larger than that of the corresponding mounting hole, arc-shaped grooves are formed in the movable plate in a mode of surrounding the through holes in the circumferential direction, the other end of a deflector rod on the limiting tooth is located in the arc-shaped grooves of the movable plate, and the lower end of the movable. When the automatic locking device works, the movable plate moves outwards along the radial direction under the action of liquid buoyancy, the movement of the movable plate pushes the shifting rod to move along the arc-shaped groove of the movable plate, so that the limiting teeth rotate, the limiting teeth are smoothly clamped into the thread grooves of the bolts, and the loosening of the bolts can be effectively avoided.
The limiting teeth are provided with grooves at the positions in contact with the threads of the bolts, movable teeth are arranged in the grooves, and the movable teeth are installed in the grooves of the limiting teeth through springs II. Because an included angle is formed between the thread groove of the bolt and the plane of the movable plate, when the limiting teeth rotate, the movable teeth are in contact with the thread parts of the bolt at different positions, the movable teeth can move to a certain degree, and damage caused by uneven stress of the movable teeth can be avoided.
The flange body is horizontally provided with a first sliding groove outwards along the radial direction on the side wall of the annular groove, the first sliding grooves are uniformly arranged on the flange body in the circumferential direction, and a second sliding groove is arranged on the right end face of the flange body along the axis direction and is communicated with the first sliding groove; a circular limiting groove with a triangular cross section is arranged on one side, close to the sliding groove I, of the sealing ring; a first sliding block is arranged in the first sliding groove, the first sliding block is installed in the first sliding groove through a third spring, one end of the first sliding block is in contact with the annular limiting groove of the sealing ring, and a wedge-shaped groove is formed in one side, close to the second sliding groove, of the other end of the first sliding block; and the second sliding groove is provided with a second sliding block, one end of the second sliding block is in contact with the wedge-shaped groove of the first sliding groove, and the other end of the second sliding block extends out of the second sliding groove. After two flanges pass through the bolt mounting together, when the unstable clearance that leads to between two flanges of atress was inhomogeneous appearing, the flange promoted to remove in the sealed ring annular groove, and the removal of sealing ring makes two sliding blocks stretch out from the right-hand member face of flange, withstands mating flange, offsets the unbalanced force that receives of flange, avoids the sealing washer to reveal because of the uneven appearance of the atress of flange.
The flange body is provided with a storage tank on the thread tooth surface of the pipe thread; the storage tank is internally stored with metal powder, the diameter of the metal powder is 0.05-0.1 um, the storage tank is plugged on the tooth surface of the thread through a protective film, when the flange body is connected with the pipe through the thread, the protective film can be broken in the thread screwing process, a push plate is arranged in the storage tank, and the metal powder can enter the thread screwing part of the flange and the pipeline, so that the plugging of the gap between the threads is realized, the screwing-out resistance of the threads is increased, and the looseness of the thread connection is prevented; the push plate is arranged in the storage tank through a third spring and used for pushing out the metal powder in the storage tank. In-process that passes through the screw thread realization to be connected at flange and pipeline, the soon of screw thread closes the protection film and is crowded brokenly, and the push pedal extrudes the metal powder in the hold up tank under the spring action of spring three, and metal powder gets into the thread groove in to realize the shutoff in clearance between the screw thread, increase the resistance when the screw thread is unscrewed, thereby prevent that threaded connection from appearing becoming flexible.
A cutting unit is arranged at one end of the moving plate, which is positioned in the inner hole of the flange body; the cutting unit comprises telescopic rods, a connecting disc, a cutting block, a rotating ring and connecting rods, the number of the telescopic rods is the same as that of the movable plates in the same plane perpendicular to the axis of the flange body, one end of each telescopic rod is fixedly connected to the end of each movable plate, the other end of each telescopic rod is connected with the connecting disc, the telescopic rods and the movable plates are in the same plane, and the circumferential surfaces of the telescopic rods are provided with thread structures; the cutting block is installed on the outer surface of the telescopic rod in a threaded connection mode, the cutting block can move along the telescopic rod, cutting teeth are arranged on the side face of the cutting block and used for crushing sundries in a sewage pipeline, and pipeline blockage is avoided; the rotating ring is rotatably arranged at the end part of the moving plate; one end of the connecting rod is hinged to the cutting block, the other end of the connecting rod is hinged to the rotating ring, an acute angle is formed between the connecting rod and the telescopic rod, and an acute angle is formed between the connecting rod and the horizontal plane. When liquid in the pipeline makes the movable plate come-up, the movable plate outwards moves along the sliding groove, the movable plate moves to pull the connecting rod to move, the telescopic rod is elongated, the connecting rod moves to enable the cutting block to rotate and move on the telescopic rod along the telescopic rod, and the cutting block rotates and moves to crush sundries in the liquid, so that the pipeline can be prevented from being blocked.
The invention has the following beneficial effects:
1. according to the method for constructing the sewage deep sea discharge engineering pipeline, the steel pipe is fixed through the positioning pile, so that the pipeline is better in environmental adaptability, meanwhile, the threaded flange adopted in pipeline connection clamps the bolt through buoyancy of liquid in the pipeline, the bolt is prevented from loosening, the reliability of flange connection is guaranteed, and the service life of the pipeline is prolonged.
2. According to the construction method of the sewage deep sea discharge engineering pipeline, the threaded flange is matched with the cutting unit through the limiting unit, so that sundries in liquid in the pipeline are crushed, the pipeline is prevented from being blocked, the use reliability of the pipeline is improved, and the overhaul and maintenance cost is reduced.
3. According to the construction method of the sewage deep sea discharge engineering pipeline, the sealing ring is arranged on the threaded flange body, so that external liquid is difficult to enter a gap between the two flanges and contact with the sealing ring due to the existence of the sealing ring, the aging of the sealing ring is slowed down, and the service life of the pipeline is prolonged.
Drawings
FIG. 1 is a flow chart of a method of the present invention;
FIG. 2 is a front view of the present invention;
FIG. 3 is a cross-sectional view A-A of FIG. 2;
FIG. 4 is a partial schematic view of a spacing tooth in accordance with the present invention;
FIG. 5 is a cross-sectional view B-B of FIG. 2;
FIG. 6 is an enlarged fragmentary view of the flange body of the present invention at the pipe threads;
in the figure: the flange comprises a flange body 1, a limiting unit 2, a circular groove 11, a sealing ring 3, limiting teeth 21, a shifting rod 22, a moving plate 23, a mounting groove 12, a sliding groove 13, movable teeth 211, a first sliding groove 14, a second sliding groove 15, a circular limiting groove 31, a storage tank 16, a protective film 4, a push plate 5, a cutting unit 6, a telescopic rod 61, a connecting disc 62, a cutting block 63, a rotating ring 64, a connecting rod 65 and cutting teeth 631.
Detailed Description
The method for constructing a pipeline for a deep sewage drainage facility according to the present invention will be described below with reference to fig. 1 to 6.
As shown in fig. 1 and 2, the method for constructing a pipeline of a sewage deep sea drainage project comprises the following steps:
the method comprises the following steps: finishing the processing treatment of the steel pipe on the shore, and mounting a threaded flange at the end part of the steel pipe;
step two: after the first step is finished, conveying the steel pipe to a construction site; simultaneously, laying positioning piles on the seabed;
step three: after the positioning piles are arranged, hoisting the steel pipes to the positioning piles, and moving the steel pipes to enable the threaded flanges at the end parts of the adjacent steel pipes to be aligned and contacted;
step four: after the flanges of the adjacent steel pipes in the third step are aligned, connecting and fastening the two flanges by using bolts;
step five: in the fourth step, after the flange is fastened through bolts, the steel pipe is fixed on the positioning pile;
the threaded flange in the first step comprises a flange body 1, the flange body 1 is formed by coaxially mounting an inner ring and an outer ring, a section of pipe thread is arranged at the left end of an inner hole of the flange body 1, a sealing surface of the right end surface of the flange body 1 is a convex surface, and mounting holes are circumferentially arranged at positions, far away from the inner hole, of the flange body 1; a limiting unit 2 is arranged in the mounting hole of the flange body 1, and the limiting unit 2 prevents the bolt from loosening and falling off by utilizing the buoyancy of liquid in the pipeline; a circular groove 11 is formed in the right end face of the flange body 1 and outside the mounting hole, and a first spring and a sealing ring 3 are arranged in the circular groove 11 of the flange body 1; one end of the sealing ring 3 is arranged in the annular groove 11 of the flange body 1 through a spring I, the other end of the sealing ring 3 extends out of the annular groove 11 of the flange body 1, and after the two paired threaded flanges are connected through bolts to realize installation, the sealing ring 3 is tightly pressed between the two threaded flanges, so that external liquid is prevented from directly contacting with a sealing ring on an inner sealing surface through a gap between the two flanges, and the aging of the sealing ring is slowed down; wherein,
as shown in fig. 2 and 3, the limiting unit 2 includes a limiting tooth 21, a pin, a shift lever 22 and a moving plate 23; the flange body 1 is provided with a mounting groove 12 at a position coaxial with the mounting hole, the flange body 1 is circumferentially provided with a sliding groove 13 on the inner wall along the radial direction, the position of the sliding groove 13 corresponds to the position of the mounting groove 12, the sliding groove 13 is positioned at one side of the mounting groove 12, and the sliding groove 13 is communicated with the mounting groove 12; the limiting teeth 21 are hinged in the mounting groove 12 of the flange body 1 through a pin shaft, and the limiting teeth 21 are used for clamping the thread part of the bolt; one end of the shift lever 22 is fixed on the position of the limiting tooth 21 deviating from the pin shaft; the movable plate 23 is installed in the sliding groove 13 of the flange body 1, the number of the movable plates 23 is the same as that of the installation grooves 12, through holes are horizontally formed in the positions, coaxial with the installation holes, of the movable plates 23, the diameter of each through hole is larger than that of the installation holes, arc-shaped grooves are formed in the movable plates 23 around the circumference of the through holes, the other ends of the deflector rods 22 on the limiting teeth 21 are located in the arc-shaped grooves of the movable plates 23, and the lower ends of the movable plates 23 extend to inner holes of the. When the bolt locking mechanism works, the moving plate 23 moves outwards along the radial direction under the action of liquid buoyancy, the moving plate 23 moves to push the shifting rod 22 to move along the arc-shaped groove of the moving plate 23, so that the limiting teeth 21 rotate, the limiting teeth 21 are smoothly clamped into the thread grooves of the bolt, and the bolt can be effectively prevented from loosening.
As shown in fig. 4, a groove is formed in a portion of the limit tooth 21, which is in contact with the thread of the bolt, a movable tooth 211 is arranged in the groove of the limit tooth 21, and the movable tooth 211 is installed in the groove of the limit tooth 21 through a second spring. Because the thread groove of bolt and the plane of movable plate 23 are the contained angle between, when spacing tooth 21 rotated, the different position contact of movable tooth 211 and the screw thread part of bolt, movable tooth 211 can remove to a certain extent, can avoid movable tooth 211 atress inhomogeneous and lead to damaging.
As shown in fig. 2, the flange body 1 is horizontally provided with a first sliding groove 14 on the side wall of the annular groove 11 along the radial direction, the first sliding grooves 14 are uniformly arranged on the flange body 1 in the circumferential direction, a second sliding groove 15 is arranged on the right end surface of the flange body 1 along the axial direction, and the second sliding groove 15 is communicated with the first sliding groove 14; a circular limiting groove 31 with a triangular cross section is formed in one side, close to the first sliding groove 14, of the sealing ring 3; a first sliding block is arranged in the first sliding groove 14, the first sliding block is installed in the first sliding groove 14 through a third spring, one end of the first sliding block is in contact with the annular limiting groove 31 of the sealing ring 3, and a wedge-shaped groove is formed in one side, close to the second sliding groove 15, of the other end of the first sliding block; and the second sliding groove 15 is provided with a second sliding block, one end of the second sliding block is in contact with the wedge-shaped groove of the first sliding groove 14, and the other end of the second sliding block extends out of the second sliding groove 15. After two flanges pass through the bolt mounting together, when appearing the atress unstability and leading to the clearance between two flanges inhomogeneous, the flange promotes sealing ring 3 and removes in ring groove 11, and sealing ring 3's removal makes two right-hand members faces of following the flange of sliding block stretch out, withstands mating flange, offsets the unbalanced force that receives of flange, avoids the sealing washer to appear revealing because of the atress inequality of flange.
As shown in fig. 2 and 6, the flange body 1 is provided with a reserve groove 16 on the thread flank of the pipe thread; metal powder is stored in the storage tank 16, the diameter of the metal powder is 0.05-0.1 um, the storage tank 16 is plugged on the tooth surface of the thread through the protective film 4, when the flange body 1 is connected with the pipe through the thread, the protective film 4 can be broken in the thread screwing process, a push plate 5 is arranged in the storage tank 16, and the metal powder can enter the thread screwing part of the flange and the pipeline, so that the plugging of the gap between the threads is realized, the screwing-out resistance of the thread is increased, and the loosening of the thread connection is prevented; the push plate 5 is installed in the storage tank 16 through a spring III, and the push plate 5 is used for pushing out the metal powder in the storage tank 16. In the process that the flange is connected with the pipeline through the threads, the protective film 4 is broken through the screwing of the threads, the metal powder in the storage tank 16 is extruded out by the push plate 5 under the action of the elastic force of the spring III, and the metal powder enters the thread groove, so that the gap between the threads is sealed, the resistance of the threads during screwing out is increased, and the looseness of the threaded connection is prevented.
As shown in fig. 2 and 5, one end of the moving plate 23, which is located in the inner hole of the flange body 1, is provided with a cutting unit 6; the cutting unit 6 comprises telescopic rods 61, a connecting disc 62, cutting blocks 63, a rotating ring 64 and connecting rods 65, the number of the telescopic rods 61 is the same as that of the movable plates 23 in the same plane perpendicular to the axis of the flange body 1, one end of each telescopic rod 61 is fixedly connected to the end of each movable plate 23, the other end of each telescopic rod 61 is connected with the connecting disc 62, the telescopic rods 61 and the movable plates 23 are in the same plane, and the circumferential surface of each telescopic rod 61 is provided with a threaded structure; the cutting block 63 is installed on the outer surface of the telescopic rod 61 through threaded connection, the cutting block 63 can move along the telescopic rod 61, cutting teeth 631 are arranged on the side surface of the cutting block 63, and the cutting teeth 631 are used for crushing sundries in a sewage pipeline to avoid pipeline blockage; the rotating ring 64 is rotatably arranged at the end part of the moving plate 23; one end of the connecting rod 65 is hinged to the cutting block 63, the other end of the connecting rod 65 is hinged to the rotating ring 64, an acute angle is formed between the connecting rod 65 and the telescopic rod 61, and an acute angle is formed between the connecting rod 65 and the horizontal plane. When the liquid in the pipeline enables the moving plate 23 to float upwards, the moving plate 23 moves outwards along the sliding groove 13, the moving plate 23 moves to pull the connecting rod 65 to move, the telescopic rod 61 is lengthened, the cutting block 63 rotates and moves on the telescopic rod 61 along the telescopic rod 61 when the connecting rod 65 moves, and the rotation and movement of the cutting block 63 realize the smashing of sundries in the liquid, so that the pipeline can be prevented from being blocked.
After the two paired threaded flanges are connected through the bolts to realize installation, the sealing ring 3 is pressed between the two threaded flanges, so that external liquid or gas is prevented from directly contacting with the sealing ring on the sealing surface inside through a gap between the two flanges, and the aging of the sealing ring is prevented.
When the bolt is used, the moving plate 23 moves outwards along the radial direction under the action of liquid buoyancy, the moving plate 23 moves to push the shifting rod 22 to move along the arc-shaped groove of the moving plate 23, so that the limiting teeth 21 rotate, the limiting teeth 21 are smoothly clamped into the thread grooves of the bolt, and the bolt can be effectively prevented from loosening.
After two flanges pass through the bolt mounting together, when appearing the atress unstability and leading to the clearance between two flanges inhomogeneous, the flange promotes sealing ring 3 and removes in ring groove 11, and sealing ring 3's removal makes two right-hand members faces of following the flange of sliding block stretch out, withstands mating flange, offsets the unbalanced force that receives of flange, avoids the sealing washer to appear revealing because of the atress inequality of flange.
In the process that the flange is connected with the pipeline through the threads, the protective film 4 is broken through the screwing of the threads, the metal powder in the storage tank 16 is extruded out by the push plate 5 under the action of the elastic force of the spring III, and the metal powder enters the thread groove, so that the gap between the threads is sealed, the resistance of the threads during screwing out is increased, and the looseness of the threaded connection is prevented.
When the liquid in the pipeline enables the moving plate 23 to float upwards, the moving plate 23 moves outwards along the sliding groove 13, the moving plate 23 moves to pull the connecting rod 65 to move, the telescopic rod 61 is lengthened, the cutting block 63 rotates and moves on the telescopic rod 61 along the telescopic rod 61 when the connecting rod 65 moves, and the rotation and movement of the cutting block 63 realize the smashing of sundries in the liquid, so that the pipeline can be prevented from being blocked.
While one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the scope of the present invention.
(A) In the above embodiment, two layers of limiting units are arranged in the flange, but the invention is not limited thereto, and multiple layers of limiting units can be arranged in the flange body according to working requirements to avoid loose bolt connection.
Industrial applicability
According to the present invention, the efficiency of pipe laying and the life span of pipes can be improved by using the method in deep sea sewer piping, and thus the method is useful in the field of sewer pipe construction.
Claims (5)
1. A sewage deep sea discharge engineering pipeline construction method is characterized in that: the method comprises the following steps:
the method comprises the following steps: finishing the processing treatment of the steel pipe on the shore, and mounting a threaded flange at the end part of the steel pipe;
step two: after the first step is finished, the steel pipe is conveyed to a construction site, and positioning piles are arranged on the seabed;
step three: after the positioning piles are arranged, hoisting the steel pipes to the positioning piles, and moving the steel pipes to enable the threaded flanges at the end parts of the adjacent steel pipes to be aligned and contacted;
step four: after the flanges of the adjacent steel pipes in the third step are aligned, connecting and fastening the two flanges by using bolts;
step five: in the fourth step, after the flange is fastened through bolts, the steel pipe is fixed on the positioning pile;
the threaded flange in the first step comprises a flange body (1), wherein the flange body (1) is formed by coaxially mounting an inner ring and an outer ring, a section of pipe thread is arranged at the left end of an inner hole of the flange body (1), a sealing surface of the right end surface of the flange body (1) is a convex surface, and mounting holes are circumferentially arranged at positions, far away from the inner hole, of the flange body (1); a limiting unit (2) is arranged in a mounting hole of the flange body (1), and the limiting unit (2) prevents the bolt from loosening and falling off by utilizing the buoyancy of liquid in the pipeline; a circular groove (11) is formed in the right end face of the flange body (1) and outside the mounting hole, and a first spring and a sealing ring (3) are arranged in the circular groove (11) of the flange body (1); one end of the sealing ring (3) is arranged in the annular groove (11) of the flange body (1) through the first spring, the other end of the sealing ring (3) extends out of the annular groove (11) of the flange body (1), and after the two paired threaded flanges are connected through bolts to realize installation, the sealing ring (3) is pressed between the two threaded flanges, so that external liquid or gas is prevented from directly contacting with the sealing ring on the inner sealing surface through a gap between the two flanges, and the aging of the sealing ring is slowed down; wherein,
the limiting unit (2) comprises a limiting tooth (21), a pin shaft, a shifting lever (22) and a moving plate (23); the flange body (1) is provided with a mounting groove (12) at a position coaxial with the mounting hole, the inner wall of the flange body (1) is circumferentially provided with a sliding groove (13) along the radial direction, the position of the sliding groove (13) corresponds to the position of the mounting groove (12), the sliding groove (13) is positioned at one side of the mounting groove (12), and the sliding groove (13) is communicated with the mounting groove (12); the limiting teeth (21) are hinged in the mounting groove (12) of the flange body (1) through a pin shaft, and the limiting teeth (21) are used for clamping the thread part of the bolt; one end of the shifting lever (22) is fixed on the position of the limiting tooth (21) deviating from the pin shaft; the movable plate (23) is installed in a sliding groove (13) of the flange body (1), the number of the movable plates (23) is the same as that of the installation grooves (12), through holes are horizontally formed in the positions, coaxial with the installation holes, of the movable plates (23), the diameter of each through hole is larger than that of the installation holes, arc-shaped grooves are formed in the movable plates (23) in the circumferential direction around the through holes, the other ends of deflector rods (22) on the limiting teeth (21) are located in the arc-shaped grooves of the movable plates (23), and the lower ends of the movable plates (23) extend to inner holes of the flange body (1).
2. The construction method of the sewage deep sea discharge engineering pipeline according to claim 1, characterized in that: the position of the limiting tooth (21) in contact with the screw thread of the bolt is provided with a groove, the limiting tooth (21) is provided with a movable tooth (211) in the groove, and the movable tooth (211) is arranged in the groove of the limiting tooth (21) through a second spring.
3. The construction method of the sewage deep sea discharge engineering pipeline according to claim 1, characterized in that: the flange body (1) is provided with a first sliding groove (14) on the side wall of the annular groove (11) in a radially outward horizontal mode, the first sliding grooves (14) are uniformly arranged on the flange body (1) in the circumferential direction, a second sliding groove (15) is arranged on the right end face of the flange body (1) in the axial direction, and the second sliding groove (15) is communicated with the first sliding groove (14); a circular limiting groove (31) with a triangular cross section is formed in one side, close to the sliding groove I (14), of the sealing ring (3); a first sliding block is arranged in the first sliding groove (14), the first sliding block is installed in the first sliding groove (14) through a third spring, one end of the first sliding block is in contact with the annular limiting groove (31) of the sealing ring (3), and a wedge-shaped groove is formed in one side, close to the second sliding groove (15), of the other end of the first sliding block; and a second sliding block is arranged in the second sliding groove (15), one end of the second sliding block is in contact with the wedge-shaped groove of the first sliding groove (14), and the other end of the second sliding block extends out of the second sliding groove (15).
4. The construction method of the sewage deep sea discharge engineering pipeline according to claim 1, characterized in that: the flange body (1) is provided with a storage groove (16) on the thread tooth surface of the pipe thread; the storage tank (16) is internally stored with metal powder, the diameter of the metal powder is 0.05-0.1 um, the storage tank (16) is plugged on the tooth surface of a thread through the protective film (4), when the flange body (1) is in threaded connection with a pipe, the protective film (4) can be broken in the thread screwing process, a push plate (5) is arranged in the storage tank (16), and the metal powder can enter the thread screwing part of the flange and the pipe, so that the gap between the threads is plugged, the resistance of screwing out of the threads is increased, and the threaded connection is prevented from loosening; the push plate (5) is arranged in the storage tank (16) through a third spring, and the push plate (5) is used for pushing out the metal powder in the storage tank (16).
5. The construction method of the sewage deep sea discharge engineering pipeline according to claim 1, characterized in that: a cutting unit (6) is arranged at one end of the moving plate (23) positioned in the inner hole of the flange body (1); the cutting unit (6) comprises telescopic rods (61), a connecting disc (62), a cutting block (63), a rotating ring (64) and connecting rods (65), the number of the telescopic rods (61) is the same as that of the movable plates (23) in the same plane perpendicular to the axis of the flange body (1), one ends of the telescopic rods (61) are fixedly connected to the end portions of the movable plates (23), the other ends of the telescopic rods (61) are connected with the connecting disc (62), the telescopic rods (61) and the movable plates (23) are in the same plane, and the circumferential surface of each telescopic rod (61) is provided with a threaded structure; the cutting block (63) is installed on the outer surface of the telescopic rod (61) in a threaded connection mode, the cutting block (63) can move along the telescopic rod (61), cutting teeth (631) are arranged on the side face of the cutting block (63), and the cutting teeth (631) are used for crushing sundries in a sewage pipeline to avoid pipeline blockage; the rotating ring (64) is rotatably arranged at the end part of the moving plate (23); one end of the connecting rod (65) is hinged to the cutting block (63), the other end of the connecting rod (65) is hinged to the rotating ring (64), an acute angle is formed between the connecting rod (65) and the telescopic rod (61), and an acute angle is formed between the connecting rod (65) and the horizontal plane.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810633585.9A CN108625457B (en) | 2018-06-20 | 2018-06-20 | Pipeline construction method for sewage deep sea discharge engineering |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810633585.9A CN108625457B (en) | 2018-06-20 | 2018-06-20 | Pipeline construction method for sewage deep sea discharge engineering |
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| CN108625457A CN108625457A (en) | 2018-10-09 |
| CN108625457B true CN108625457B (en) | 2020-07-21 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US5056830A (en) * | 1990-07-27 | 1991-10-15 | Reaux James R | Flanged repair coupling for pipeline service |
| CN102287599A (en) * | 2010-06-18 | 2011-12-21 | 西安轨道交通装备有限责任公司 | Flange connection sealing device |
| CN104631602B (en) * | 2014-12-31 | 2016-08-17 | 中交一航局第二工程有限公司 | Sewage deep sea emission engineering marine site pipeline construction method |
| CN106322023A (en) * | 2016-08-31 | 2017-01-11 | 安徽金大仪器有限公司 | Elastic resetting unthreaded sealing flange |
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Application publication date: 20181009 Assignee: Hebei Shuangfeng Environmental Protection Technology Co.,Ltd. Assignor: Jiangsu intelligent workshop Technology Research Institute Co.,Ltd. Contract record no.: X2022980004440 Denomination of invention: A pipeline construction method for sewage deep-sea discharge engineering Granted publication date: 20200721 License type: Common License Record date: 20220420 |
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