Underwater pulling and closing construction device and method for submarine immersed tube

Abstract

The present invention discloses an underwater pulling and closing construction device and method for a subsea immersed tube, and belongs to the technical field of subsea immersed tube installation. The technical key points include an active pulling and closing unit, which includes a pulling and closing oil cylinder, an active pulling and closing structural member, a main rotating block, a vertical adjustment oil cylinder, an active pull rod, an elevation adjustment screw and a first anti-bounce pin shaft. The bottom of the active pulling and closing unit is provided with a subsea tube to be installed, and the top of the subsea tube to be installed is fixedly installed with a first tie column. The active pulling and closing unit is installed on the first tie column of the subsea tube to be installed, and the pulling and closing force surface of the active pulling and closing unit and the fitting surface of the first tie column are designed with arc blocks. The present invention adopts the method of automatic docking of the active pulling and closing unit and the passive pulling and closing unit, which can complete the automatic operation of the pulling and closing unit, effectively solves the automatic connection of underwater pulling and closing equipment, intelligent pulling and closing, and accurate and controllable pulling force and position, effectively reduces the underwater operation of divers, and improves the stability and efficiency of work.

Description

Technical Field

[0001] The invention belongs to the technical field of submarine immersed tube installation, and in particular relates to an underwater pulling and closing construction device and method for a submarine immersed tube. Background Art

[0002] The construction and installation process of the immersed tube of the submarine tunnel is to use the prefabricated immersed tube, and then tow and float it to the installation point by barge for sinking and installation. After the immersed tube is initially set to be sunk, the underwater pulling and closing mechanism installed on the mooring column is used to accurately pull the immersed tube to be installed underwater, and complete the preliminary compression of the GINA rings of the installed immersed tube and the immersed tube to be installed, so as to achieve hydraulic compression and butt joint of the immersed tube.

[0003] In actual operation, the working environment is several 40 meters below the surface, the underwater visibility is poor, and the working efficiency and working time of divers are greatly reduced. In addition, for large immersed tubes, the underwater pulling force required is relatively large, and the volume and weight of the equipment are relatively large. The underwater manual docking of the pulling and connecting equipment becomes very difficult. For this reason, we propose an underwater pulling and connecting construction method for submarine immersed tubes to make the pulling and connecting and connecting more efficient, safe and quick to complete the installation. Summary of the invention

[0004] The purpose of the present invention is to provide an underwater pulling and closing construction device and method for a submarine immersed tube, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a device and method for underwater pulling and closing of a submarine immersed tube, which comprises:

[0006] (1) An active closing and pulling unit, which includes a closing and pulling cylinder, an active closing and pulling structure, a main rotating block, a vertical adjustment cylinder, an active pull rod, an elevation adjustment screw and a first anti-bounce pin shaft. A submerged pipe to be installed is arranged at the bottom of the active closing and pulling unit, and a first tie column is fixedly installed on the top of the submerged pipe to be installed. The active closing and pulling unit is installed on the first tie column of the submerged pipe to be installed. The closing and pulling force surface of the active closing and pulling unit and the fitting surface of the first tie column are designed as arc blocks. An anti-hook plate is arranged on the first tie column. The first anti-bounce pin shaft on the active closing and pulling unit is placed under the anti-hook plate of the first tie column. The closing and pulling cylinder is connected to the main rotating block by bolt shaft connection. The main rotating block has two horizontal protruding shafts respectively connected to two closing and pulling cylinders.

[0007] (2) A passive pulling and closing unit, which includes a passive pulling and closing structure, a rotated block, a passive hook, an elevation adjustment nut, and a second anti-bounce pin shaft. An installed immersed tube is arranged at the bottom of the passive pulling and closing unit, and a second tie column is fixedly installed on the top of the installed immersed tube. The passive pulling and closing unit is installed on the second tie column of the installed immersed tube. The pulling and closing force surface of the passive pulling and closing unit and the fitting surface of the second tie column are designed as arc blocks. The second tie column is fixedly connected to the passive pulling and closing structure.

[0008] Preferably, the active pulling and closing unit and the passive pulling and closing unit can be automatically connected, and the distance between the active pulling and closing unit and the passive pulling and closing unit is adjustable.

[0009] Preferably, the main rotating block and the rotated block can be arranged according to the misalignment direction when the immersed tube to be installed and the immersed tube already installed are docked.

[0010] Preferably, the elevation adjustment nut and the elevation adjustment screw can be leveled according to the unevenness of the surface of the immersed tube to be installed and the installed immersed tube.

[0011] Preferably, the elevation adjustment nut is made of stainless steel for corrosion protection.

[0012] Preferably, the first anti-bounce pin shaft and the second anti-bounce pin shaft are used to ensure that during the pulling operation, the active pulling unit and the passive pulling unit are safely locked to the first tie-down column and the second tie-down column respectively.

[0013] Preferably, there are two active pulling and closing cylinders.

[0014] Preferably, a GINA ring is provided on a side of the installed immersed tube opposite to the immersed tube to be installed, and the GINA ring is fixedly connected to the surface of the immersed tube to be installed.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] (1) The present invention provides a seabed underwater pulling and closing device and method, which uses an active pulling and closing unit and a passive pulling and closing unit to automatically connect and complete the automatic operation of the pulling and closing unit.

[0017] (2) The present invention can achieve precise control of force and displacement, effectively reduce the workload of underwater construction workers, improve work efficiency, and be safe and reliable.

[0018] (3) When adjusting the horizontal or longitudinal deviation, the present invention uses the elevation adjustment screw to perform comparison, which is more convenient and quick.

[0019] (4) The present invention adopts an all-inclusive design in structure, and the entire device has no sharp corners, which avoids underwater cutting of cables and wire ropes and improves safety.

[0020] (5) The present invention has an anti-bounce device on the pulling and closing structure, which replaces the previous screw-in device, is easy to install and easy to remove after the pulling and closing is completed.

[0021] (6) The present invention adds an angle sensor to the vertical adjustment cylinder, and can judge whether the active pulling and closing unit and the passive pulling and closing unit are overlapped smoothly through two methods: the angle and the displacement of the vertical cylinder.

[0022] (7) The present invention is provided with a horizontal angle sensor, which can determine the horizontal deflection angle during pulling and closing.

[0023] (8) The control system of the present invention adopts a redundant design. In addition to the main control, any substation can also be set as the main station to be used as a pull and mechanism.

[0024] (9) The pump station in the present invention also adopts a redundant design. When any pump station fails, the other pump station can control the use of two pulling and closing mechanisms.

[0025] (10) The system in the present invention synchronously adopts variable frequency control, which can achieve stepless speed regulation and meet the needs of various motion conditions. Previously, a fixed speed mode was used. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a top view of the underwater pulling and closing device of the present invention;

[0027] Figure 2 It is an isometric view of the underwater pulling and closing device of the present invention;

[0028] Figure 3 This is a schematic diagram of the initial sinking of the immersed tube to be installed in the present invention;

[0029] Figure 4 It is a schematic diagram of the extension of the pulling and closing oil cylinder of the present invention;

[0030] Figure 5 It is a schematic diagram of the active pull rod and the pull hook overlapped in the present invention;

[0031] Figure 6 It is a schematic diagram of the underwater pulling and closing device of the present invention after pulling and closing;

[0032] Figure 7 It is a schematic diagram of the underwater pulling and closing device of the present invention when there is a vertical deviation;

[0033] Figure 8 It is a schematic diagram of the underwater pulling and closing device of the present invention when there is a deviation in the horizontal direction.

[0034] In the figure: 10, active pulling and closing unit; 101, pulling and closing cylinder; 102, active pulling and closing structure; 103, main rotating block; 104, vertical adjustment cylinder; 105, active pull rod; 106, first anti-bounce pin; 107, elevation adjustment screw; 20, passive pulling and closing unit; 201, passive pulling and closing structure; 202, rotated block; 203, passive hook; 204, elevation adjustment nut; 205, second anti-bounce pin; 30, immersed tube to be installed; 301, first tie rod; 40, installed immersed tube; 401, second tie rod; 50, GINA ring. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the invention.

[0036] See also Figure 1-Figure 8 The present invention provides an underwater pulling and closing construction device for a submarine immersed tube, which comprises:

[0037] (1) Active closing and pulling unit 10, which includes a closing and pulling cylinder 101, an active closing and pulling structure 102, a main rotating block 103, a vertical adjustment cylinder 104, an active pull rod 105, an elevation adjustment screw 107 and a first anti-bounce pin 106. The bottom of the active closing and pulling unit 10 is provided with a submerged tube 30 to be installed, and the top of the submerged tube 30 to be installed is fixedly installed with a first tie rod 301. The active closing and pulling unit 10 is installed on the submerged tube 30 to be installed. On the first tie-down column 301, the tie-down force surface of the active pulling and closing unit 10 and the fitting surface of the first tie-down column 301 are designed with an arc block, and an anti-hook plate is provided on the first tie-down column 301. The first anti-bounce pin shaft 106 on the active pulling and closing unit 10 is placed under the anti-hook plate of the first tie-down column 301, and the pulling and closing cylinder 101 is connected to the main rotating block 103 by means of a bolt shaft connection. The main rotating block 103 has two horizontal protruding shafts respectively connected to the two pulling and closing cylinders 101.

[0038] (2) Passive pulling and closing unit 20, the passive pulling and closing unit 20 comprises a passive pulling and closing structure 201, a rotated block 202, a passive hook 203, an elevation adjustment nut 204, and a second anti-bounce pin shaft 205. The bottom of the passive pulling and closing unit 20 is provided with an installed immersed tube 40, and the top of the installed immersed tube 40 is fixedly installed with a second tie-down column 401. The passive pulling and closing unit 20 is installed on the second tie-down column 401 on which the immersed tube 40 is installed. The pulling and closing force surface of the passive pulling and closing unit 20 and the fitting surface of the second tie-down column 401 are designed as arc blocks, and the second tie-down column 401 is fixedly connected to the passive pulling and closing structure 201.

[0039] In the present invention, preferably, the active pulling and closing unit 10 and the passive pulling and closing unit 20 can be automatically connected, and the distance between the active pulling and closing unit 10 and the passive pulling and closing unit 20 is adjustable.

[0040] In the present invention, preferably, the main rotating block 103 and the rotated block 202 can automatically complete the force line of the active pulling and closing unit 10 and the passive pulling and closing unit 20 according to the misalignment direction when the immersed tube 30 to be installed and the installed immersed tube 40 are docked.

[0041] In the present invention, preferably, the elevation adjustment nut 204 and the elevation adjustment screw 107 can be leveled according to the unevenness of the surface of the immersed tube 30 to be installed and the installed immersed tube 40, and the elevation of the active pulling unit 10 or the passive pulling unit 20 can be adjusted.

[0042] In the present invention, preferably, the elevation adjustment nut 204 adopts stainless steel anti-corrosion measures to ensure stability in long-term use.

[0043] In the present invention, preferably, the first anti-bounce pin shaft 106 and the second anti-bounce pin shaft 205 are used to ensure that during the pulling operation, the active pulling unit 10 and the passive pulling unit 20 are safely locked on the first tie-down column 301 and the second tie-down column 401 respectively.

[0044] In the present invention, preferably, there are two active pulling and closing units 10 and two passive pulling and closing units 20 , and one active pulling and closing unit 10 has two pulling and closing oil cylinders 101 , which are provided to increase the pulling and closing force and reduce the height of the active pulling and closing unit 10 .

[0045] In the present invention, preferably, a GINA ring 50 is provided on a side of the installed immersed tube 40 opposite to the immersed tube 30 to be installed, and the GINA ring 50 is fixedly connected to the surface of the immersed tube 30 to be installed.

[0046] Furthermore, displacement sensors are installed at the connection positions between the two closing and pulling cylinders 101 of the active closing and pulling unit 10 and the active closing and pulling structure 102, so that one sensor is used and the other is prepared for on-site use.

[0047] The underwater pulling and closing construction device and method for the subsea immersed tube provided by the present invention are constructed and installed according to the following steps:

[0048] S1, disposing the immersed tube 30 to be installed at the position to be connected with the installed immersed tube 40, and disposing the GINA ring 50 at the side of the immersed tube 30 to be installed opposite to the installed immersed tube 40.

[0049] S2, fix the surface of the first mooring column 301 on the top of the immersed tube 30 to be installed to the active pulling and closing unit 10, fix the second mooring column 401 on the top of the installed immersed tube 40 to the passive pulling and closing unit 20, connect the pulling and closing cylinder 101 to the main rotating block 103 through a pin connection, and the main rotating block 103 has two horizontal protruding shafts respectively connected to the two pulling and closing cylinders 101.

[0050] S3, connecting the main rotating block 103 and the active pulling and closing structure 102 by means of vertical pin connection.

[0051] S4, after the active pull rod 105 and the pulling and closing oil cylinder 101 are connected by threads, the active pull rod 105 is rigidly fixed together to achieve the simultaneous up-and-down and left-and-right swinging of the two pulling and closing oil cylinders 101.

[0052] S5, the vertical adjustment cylinder 104 and the pulling and closing cylinder 101 are connected in an articulated manner. The extension and retraction of the vertical adjustment cylinder 104 can drive the pulling and closing cylinder 101 and the active pull rod 105 to swing up and down around the main rotating block 103.

[0053] S6, installing the elevation adjustment screw 107 on the active pulling structure 102 through threads, so as to adjust the unevenness of the immersed tube surface and the overall elevation.

[0054] S7, the passive hook 203 is connected to the rotating block 202 by means of a horizontal pin connection, and the horizontal axis can realize vertical rotation. At the same time, the rotating block 202 and the passive pulling structure 201 are connected by means of a vertical pin connection, and can realize horizontal rotation.

[0055] S8, the elevation adjustment nut 204 is installed on the passive pulling structure 201 through threads, and is used to adjust the unevenness of the immersed tube surface and the overall elevation.

[0056] S9, after the immersed tube 30 to be installed is initially sunk into place, the closing and pulling cylinder 101 on the active closing and pulling unit 10 is extended, and the active pull rod 105 is installed on the piston rod of the closing and pulling cylinder 101 and will be extended along with the closing and pulling cylinder 101.

[0057] S10 , the vertical adjustment cylinder 104 extends to swing the active pull rod 105 and the pulling and closing cylinder 101 downward together, and the active pull rod 105 on the active pulling and closing unit 10 falls onto the passive pull hook 203 on the passive pulling and closing unit 20 .

[0058] S11, applying a certain initial force to the pulling and closing oil cylinder 101 for pre-pulling, this force can eliminate the physical gap between the active pulling and closing unit 10 and the passive pulling and closing unit 20, but make the active pulling and closing unit 10 and the passive pulling and closing unit 20 tight, but will not cause displacement.

[0059] S12, the closing cylinder 101 on the active closing unit 10 performs a closed-loop closing operation according to the feedback value of the built-in displacement sensor, driving the immersed tube 30 to be installed to move toward the installed immersed tube 40 until the GINA ring 50 is initially closed.

[0060] S13, the pulling and closing cylinder 101 on the active pulling and closing unit 10 performs a force closed-loop pulling operation according to the feedback value of the pressure sensor installed thereon, and cooperates with the external hydraulic pressing to drive the immersed tube 30 to be installed to move toward the installed immersed tube 40 until the GINA ring 50 is compressed to the set compression amount.

[0061] S14, installing the first anti-ballistic jump pin shaft 106 and the second anti-ballistic jump pin shaft 205 at designated positions for positioning.

[0062] S15, after completing the operations S1-S14, all completed connection structures are checked again, and the alignment of the immersed tube 30 to be installed is completed.

Claims

1. Underwater pulling and closing construction device for subsea immersed tubes, characterized in that: include: (1) An active closing and pulling unit, which includes a closing and pulling cylinder, an active closing and pulling structure, a main rotating block, a vertical adjustment cylinder, an active pull rod, an elevation adjustment screw and a first anti-bounce pin shaft. A submerged pipe to be installed is arranged at the bottom of the active closing and pulling unit, and a first anchoring column is fixedly installed on the top of the submerged pipe to be installed. The active closing and pulling unit is installed on the first anchoring column of the submerged pipe to be installed. The closing and pulling force surface of the active closing and pulling unit and the fitting surface of the first anchoring column are designed as arc blocks. An anti-hook plate is arranged on the first anchoring column. The first anti-bounce pin shaft on the active closing and pulling unit is placed under the anti-hook plate of the first anchoring column. The closing and pulling cylinder is connected to the main rotating block by bolt shaft connection. The main rotating block has two horizontally extending shafts respectively connected to two closing and pulling cylinders. (2) A passive closing unit, which includes a passive closing structure, a rotating block, a passive hook, an elevation adjustment nut, and a second anti-bounce pin shaft. An installed immersed tube is arranged at the bottom of the passive closing unit, and a second tie-down column is fixedly installed on the top of the installed immersed tube. The passive closing unit is installed on the second tie-down column on which the immersed tube is installed. The closing force-bearing surface of the passive closing unit and the fitting surface of the second tie-down column are designed as arc blocks. The second tie-down column is fixedly connected to the passive closing structure; The main rotating block and the rotated block automatically complete the force line of the active pulling and closing unit and the passive pulling and closing unit according to the misalignment direction when the immersed tube to be installed and the installed immersed tube are docked; The elevation adjustment nut and the elevation adjustment screw are used to adjust the elevation of the active pulling and closing unit or the passive pulling and closing unit according to the unevenness of the surface of the immersed tube to be installed or the installed immersed tube; The first anti-bounce pin shaft and the second anti-bounce pin shaft are used to ensure that the active closing unit and the passive closing unit are safely locked on the first tie-holding column and the second tie-holding column respectively during the closing operation; There are two active closing units and two passive closing units, and one active closing unit has two closing cylinders; A GINA ring is provided on the side of the installed immersed tube opposite to the immersed tube to be installed, and the GINA ring is fixedly connected to the surface of the immersed tube to be installed.

2. The underwater pulling and closing construction device for subsea immersed tubes according to claim 1 is characterized in that: The active pulling and closing unit and the passive pulling and closing unit are automatically connected, and the distance between the active pulling and closing unit and the passive pulling and closing unit is adjustable.

3. The underwater pulling and closing construction device for subsea immersed tubes according to claim 1 is characterized in that: The elevation adjustment nut is made of stainless steel for corrosion protection, thereby ensuring stability during long-term use.

Images