CN-122014912-A - Underwater pipeline connecting device and connecting method

CN122014912ACN 122014912 ACN122014912 ACN 122014912ACN-122014912-A

Abstract

The invention relates to the technical field of underwater pipeline construction and discloses an underwater pipeline connecting device and a connecting method, wherein the device comprises a half joint, a lower body is provided with a positioning hole penetrating through the body, an upper body is provided with a hoisting blind hole, opposite connecting parts are formed at two ends of the lower body and the upper body, and bolt holes are formed on the connecting parts; the lifting device comprises a shoulder pole beam, a lifting piece, a first guide rod, a second guide rod, two limiting pieces and a clamping groove, wherein a first through hole opposite to a lifting blind hole is formed in the middle of the shoulder pole beam, a second through hole opposite to a bolt hole is formed in the two ends of the shoulder pole beam, the lifting piece is provided with a lifting part capable of being connected with lifting equipment, a threaded rod penetrating through the first through hole and being in threaded connection with the lifting blind hole is arranged at the lower part of the lifting piece, the first guide rod and the second guide rod are respectively arranged in the second through hole and the bolt hole, the two limiting pieces are respectively sleeved on the first guide rod and the second guide rod, and the clamping groove capable of being clamped at the connecting part is formed at the lower ends of the limiting pieces. The device can accurately, quickly and safely install and connect adjacent underwater pipelines together.

Inventors

Lv Yanjing
LI JING
LIU JIJUN
YANG JIAQI
LV JINYANG

Assignees

华北冶建工程建设有限公司
中国华冶科工集团有限公司

Dates

Publication Date: 20260512
Application Date: 20260303

Claims (10)

1. An underwater pipeline connection device, comprising: The half joint comprises a lower body, a lower body and an upper body, wherein the lower body is provided with a positioning hole penetrating through the body, the upper body is provided with a hoisting blind hole, opposite connecting parts are formed at two ends of the lower body and the upper body, and bolt holes are formed in the connecting parts; The middle part of the shoulder pole beam is provided with a first through hole opposite to the hoisting blind hole, and the two end parts of the shoulder pole beam are provided with second through holes opposite to the bolt holes; the upper part of the lifting piece is a lifting part which can be connected with lifting equipment, and the lower part of the lifting piece is a threaded rod which penetrates through the first through hole and is in threaded connection with the lifting blind hole; The first guide rod and the second guide rod are respectively arranged in the second through hole and the bolt hole; The two limiting parts are sleeved on the first guide rod and the second guide rod respectively, and clamping grooves capable of being clamped at the connecting parts are formed at the lower ends of the limiting parts.
2. An underwater pipeline connection device as claimed in claim 1, wherein, And a plurality of positioning holes are uniformly formed in the lower body.
3. An underwater pipeline connection device as claimed in claim 2, wherein, The locating hole is a countersunk hole capable of accommodating the locating bolt.
4. An underwater pipeline connection device as claimed in claim 1, wherein, The hoisting part is a hoisting ring or a lifting hook.
5. An underwater pipeline connection device as claimed in claim 1, wherein, And the upper ends of the first guide rod and the second guide rod are provided with limiting rings, and the diameter of each limiting ring is larger than that of the second through hole.
6. An underwater pipeline connection device as claimed in claim 5, wherein, The distance from the lower end of the first guide rod to the shoulder pole beam is different from the distance from the lower end of the second guide rod to the shoulder pole beam.
7. An underwater pipeline connection device as claimed in claim 4, wherein, The longitudinal section of the limiting piece is H-shaped, and clamping grooves capable of being clamped at the connecting parts are formed at the upper end and the lower end of the limiting piece.
8. A method of connecting underwater pipelines using the underwater pipeline connecting device as claimed in any one of claims 1 to 7, characterized by comprising the steps of: S1, drilling a set position blind hole at the end part of a pipeline to be installed, wherein the depth of the set position blind hole is not more than half of the wall thickness of the pipeline, and tapping to form an internal thread in the set position blind hole; s2, sleeving the lower body of the half joint at the end part of the pipeline, threading the front end of a positioning bolt into the positioning blind hole after passing through the positioning hole, fixing the lower body of the half joint at the end part of the pipeline, and hoisting a plurality of sections of pipelines to preset underwater positions for butt joint; S3, a threaded rod at the lower part of the lifting piece passes through a first through hole of the shoulder pole beam and then is in threaded connection with a lifting blind hole of the upper body of the half joint, two limiting pieces are respectively sleeved on the first guide rod and the second guide rod, a clamping groove is clamped on the connecting part, and the first guide rod and the second guide rod respectively penetrate into the second through hole and a bolt hole of the upper body; S4, connecting a hoisting part of the hoisting piece with hoisting equipment, and integrally hoisting the shoulder pole beam, the upper body, the first guide rod and the second guide rod into water to enable the first guide rod and the second guide rod to penetrate into bolt holes of the lower body respectively; S5, lowering the upper body of the half joint, enabling the clamping groove of the limiting piece to be clamped on the connecting part of the lower body, connecting the upper body and the lower body of the half joint together, screwing out the threaded rod from the hoisting blind hole, installing a limiting bolt with the diameter larger than the inner diameter of the first through hole at the lower end of the threaded rod, hoisting the shoulder pole beam, the first guide rod and the second guide rod, and fastening the rest bolt of the half joint in place; s6, repeating the steps S3 to S5 until all the half joints on the pipeline are installed.
9. The underwater pipeline connection method as claimed in claim 8, wherein, In steps S3 to S6, the half joint located in the middle is first installed, and then the remaining half joints are installed on the left and right sides.
10. The underwater pipeline connection method as claimed in claim 8, wherein, Before the pipelines of a plurality of sections are hung to the preset underwater position, the flatness of the foundation trench of the underwater pipeline is retested, and the uneven area is required to be secondarily flattened.

Description

Underwater pipeline connecting device and connecting method Technical Field The invention relates to the technical field of underwater pipeline construction, in particular to an underwater pipeline connecting device and an underwater pipeline connecting method. Background In underwater large-diameter pipeline construction, a half joint is generally adopted to firmly connect adjacent pipelines. The traditional method is that the lower half part of the half joint is sunk into the designed position of the water bottom, and then the pipeline is sunk into the water together to be matched with the lower half part of the half joint. After the leveling, the pipeline is continuously immersed into another section of pipeline for re-adjustment, then the upper half part of the half joint is lowered, and finally the pipeline is fastened and connected through bolts. However, due to the low visibility of underwater construction, many past vessels, the influence of water flow fluctuation, flow velocity, tide and other factors, it is difficult for divers to precisely control the sinking speed and position of the lower half of the half joint. Even if the lower half of the half joint is positioned, the problem of precision of butt joint with large-diameter pipelines at two ends is faced. In the follow-up operation, be difficult to accurately find the hookup location of half joint upper and lower part, this makes the butt joint installation inefficiency of submarine pipeline, and construction cycle is long, and then has increased the potential safety hazard that diver's operation is healthy to diver. Disclosure of Invention The invention provides a connecting device and a connecting method for underwater pipelines, aiming at accurately, quickly and safely installing and connecting adjacent underwater pipelines together. According to one embodiment of the invention, an underwater pipeline connecting device is provided, which comprises a half joint, a lower body is provided with a positioning hole penetrating through the body, an upper body is provided with a hoisting blind hole, opposite connecting parts are formed at two ends of the lower body and the upper body, a bolt hole is formed in the connecting parts, a shoulder pole beam is provided with a first through hole opposite to the hoisting blind hole in the middle part, two ends of the shoulder pole beam are provided with second through holes opposite to the bolt hole, the upper part of the shoulder pole beam is provided with a hoisting part capable of being connected with hoisting equipment, the lower part of the shoulder pole beam is provided with a threaded rod penetrating through the first through hole and in threaded connection with the hoisting blind hole, a first guide rod and a second guide rod are respectively arranged in the second through hole and the bolt hole, two limiting parts are respectively sleeved on the first guide rod and the second guide rod, and clamping grooves capable of being clamped in the connecting parts are formed below the limiting parts. As one embodiment, the lower body is uniformly provided with a plurality of positioning holes. As one embodiment, the positioning hole is a countersunk hole capable of accommodating the positioning bolt. As one embodiment, the lifting part is a lifting ring or a lifting hook. As one embodiment, the upper ends of the first guide rod and the second guide rod are provided with a limiting ring, and the diameter of the limiting ring is larger than that of the second through hole. As one embodiment, a distance from a lower end of the first guide bar to the shoulder pole beam is different from a distance from a lower end of the second guide bar to the shoulder pole beam. As one embodiment, the longitudinal section of the limiting member is H-shaped, and the upper and lower ends of the limiting member are formed with clamping grooves capable of being clamped at the connecting portion. S1, drilling a set position blind hole in the end part of a pipeline to be installed, wherein the depth of the set position blind hole is not more than half of the wall thickness of the pipeline, and tapping to form an internal thread in the set position blind hole; S2, sleeving a lower body of a half joint on the end part of a pipeline, enabling the front end of a positioning bolt to pass through the positioning hole and then be in threaded connection with the positioning blind hole, enabling the lower body of the half joint to be fixed on the end part of the pipeline, hanging a plurality of sections of pipelines to be in butt joint with each other at preset underwater positions, S3, enabling a threaded rod at the lower part of a hanging piece to pass through a first through hole of a shoulder pole beam and then be in threaded connection with the lifting blind hole of the upper body of the half joint, respectively sleeving two limiting pieces on the first guide rod and the second guide rod and enabling clamping grooves to be clamped on