Immersed tube joint precision positioning system and positioning method

Abstract

The present invention discloses a precise positioning system and positioning method for a submerged tube joint. The positioning system comprises a transport mechanism and a positioning jack mechanism arranged in a combination cavity. The positioning jack mechanism comprises a plurality of jacks. The transport mechanism comprises a gantry hanger for hoisting the jack between the submerged tube joint and the combination cavity, a rail transport vehicle for transporting the jack in the combination cavity, and a driving track adapted to the rail transport vehicle. The crossbeam moving track of the gantry hanger passes through the manhole door of the submerged tube joint end sealing door. The driving track is a straight track arranged in the transverse direction, and the driving track is fixedly installed on the bottom surface of the combination cavity. A first locking component for fixing the relative position between the rail transport vehicle and the driving track is provided between the rail transport vehicle and the driving track, and the body of the rail transport vehicle comprises a jack fixing assembly for fixing the jack. The positioning system and positioning method can conveniently realize the transportation and installation of the positioning jack mechanism, facilitate the positioning construction of the submerged tube joint, and improve the construction efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of underwater submerged pipe construction, and in particular relates to a precise positioning system and method for submerged pipe joints. Background Art

[0002] The construction of immersed tube tunnel is to transport the prefabricated immersed tube segments in the semi-submersible barge or dry dock to the predetermined position for sinking and docking. During the construction of immersed tube tunnel, the position of the butt joints between the immersed tube segments needs to be adjusted to ensure the accuracy of their docking installation. The adjustment process can be achieved by using a positioning jack mechanism composed of jacks to push the sealing door of the immersed tube segment end in the joint cavity between the immersed tube segments. However, the immersed tube segment has a large dead weight, and the positioning jack mechanism must meet the construction requirements of pushing and adjusting the position of the immersed tube segment, which needs to include multiple jacks, making the transportation and installation process of the positioning jack mechanism more cumbersome during construction, and the construction cost is high, which affects the construction efficiency of the precise positioning construction of the immersed tube segment joints. Summary of the invention

[0003] The present invention aims at the deficiencies of the prior art and proposes a system and method for accurately adjusting the position of a submerged tube joint. The system and method for accurately adjusting the position of a submerged tube joint can conveniently realize the transportation and installation of the adjustment jack mechanism, facilitate the adjustment construction of the submerged tube joint, and help improve the construction efficiency.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] A precise positioning system for a immersed tube joint, comprising a positioning jack mechanism arranged in a combination cavity of an immersed tube joint, the positioning jack mechanism comprising a plurality of jacks, and a transport mechanism, the transport mechanism comprising a gantry hanger for hoisting the jacks between the immersed tube joint and the combination cavity, a rail transport vehicle for transporting the jacks in the combination cavity, and a travel track adapted to the rail transport vehicle; the gantry hanger comprises two support frames, a beam moving track arranged between the top ends of the two support frames, and a hoisting hoist for hoisting the jacks, the hoisting hoist being slidably connected to the beam moving track, the two support frames being respectively arranged at the top and bottom ends of the immersed tube joint. In the pipe-pipe section and the combining cavity, the crossbeam moving track passes through the manhole door of the immersed pipe section end sealing door; taking the vertical height direction of the combining cavity as the vertical direction, the horizontal length direction of the combining cavity as the transverse direction, and the horizontal width direction of the combining cavity as the longitudinal direction, the driving track is set as a straight track arranged along the transverse direction, and the driving track is fixedly installed on the bottom surface of the combining cavity; a first locking component for fixing the relative position between the rail transport vehicle and the driving track is provided between the rail transport vehicle and the driving track, the rail transport vehicle includes a vehicle body and wheels rolling with the driving track, and the vehicle body includes a jack fixing assembly for fixedly connecting the jack to fix the central axis of the piston of the jack in the longitudinal direction.

[0006] Preferably, the gantry hanger includes a driving mechanism for driving the lifting hoist to slide on the crossbeam moving track; the traveling track includes a first height adjusting component for adjusting the vertical height of the traveling track, and the rail transport vehicle includes a second height adjusting component for adjusting the vertical height difference between the wheels of the rail transport vehicle and the traveling track.

[0007] Preferably, the first height adjustment component is configured as a first height adjustment support leg installed on the traveling track, and the bottom surface of the first height adjustment support leg is fixedly installed on the bottom surface of the combining cavity; the second height adjustment component includes a second height adjustment support leg installed on the rail transport vehicle, and the bottom surface of the second height adjustment support leg can be supported on the traveling track.

[0008] Preferably, the jack fixing assembly includes a bracket that can be supported under the side wall of the jack, and a second locking component for fixing the relative position between the bracket and the jack, and the bracket is arranged along the longitudinal direction to position the central axis of the piston of the jack in the longitudinal direction.

[0009] Preferably, the positioning jack mechanism includes a vertical positioning unit, a lateral positioning unit, and a hydraulic control mechanism for controlling the jacks, the vertical positioning unit is arranged close to the vertical edge of the combining cavity, the vertical positioning unit includes a plurality of the jacks arranged vertically, and a vertical mounting frame assembly of a cylinder body for fixing the plurality of the jacks arranged vertically, the bottom of the vertical mounting frame assembly is fixedly installed in the combining cavity; the lateral positioning unit includes a plurality of the jacks arranged horizontally, the rail transport vehicle and the jacks of the lateral positioning unit are arranged in a one-to-one correspondence, when the positioning jack mechanism is operating, the jacks of the lateral positioning unit are fixedly installed on the rail transport vehicle corresponding to the jacks, the plurality of the jacks of the lateral positioning unit are arranged along the vehicle track, and the plurality of the rail transport vehicles are fixed on the vehicle track by a first locking component; the pistons of the jacks are all arranged close to the end sealing doors of the immersed tube section and can push the end sealing doors longitudinally.

[0010] Preferably, one end of the vertical positioning unit is arranged close to one end of the horizontal positioning unit to form an L-shaped positioning jack mechanism.

[0011] Preferably, the jack includes a cylinder body, a piston that is slidably sealed with the inner wall of the cylinder body, a piston rod, and a first oil port and a second oil port opened in the cylinder body, one end of the cylinder body is set as a cylinder bottom, and the other end is set as a cylinder body opening, the piston and the rod head plug body are respectively fixedly installed at both ends of the piston rod, the radial dimensions of the piston and the rod head plug body are larger than the radial dimensions of the piston rod, the cylinder body opening is sleeved on the rod head plug body, and the rod head plug body and the cylinder body opening are slidably sealed along the axial direction of the piston rod; a sealing ring is fixedly installed on the inner wall of the cylinder body, the sealing ring and the cylinder bottom are respectively arranged on both sides of the piston, the sealing ring is sleeved on the piston rod, and the piston rod and the sealing ring are slidably sealed along the axial direction of the piston rod; the inner wall of the cylinder body, the sealing The space surrounded by the ring and the rod head plug body constitutes a first oil chamber, the space surrounded by the inner wall of the cylinder body, the piston and the sealing ring constitutes a second oil chamber, and the space surrounded by the inner wall of the cylinder body, the cylinder bottom and the piston constitutes a third oil chamber; the first oil port connects the first oil chamber and the third oil chamber, and the second oil port connects the second oil chamber; the cylinder body, the cylinder body opening, the piston, the piston rod, the sealing ring, and the rod head plug body are all coaxially arranged with their central axes, and the outer wall of the rod head plug body is set to be cylindrical; the piston rod is provided with an elastic sealing member for sealing the gap between the piston and the inner wall of the cylinder body, the inner ring of the sealing ring is provided with an elastic sealing member for sealing the gap between the piston rod and the sealing ring, and the rod head plug body is provided with an elastic sealing member for sealing the rod head plug body and the cylinder body opening.

[0012] Preferably, the vertical mounting frame assembly includes a plurality of rectangular frames, and the rectangular frames are arranged in a one-to-one correspondence with the jacks of the vertical positioning unit; the top surface and the bottom surface of the rectangular frame are both set as horizontal setting surfaces, the rectangular frame is sleeved on the cylinder body of the jack arranged corresponding to it and is fixedly connected to the cylinder body, the rectangular frame also includes a plurality of positioning and docking components, the positioning and docking components include vertically arranged slots and vertical plug rods adapted to the slots, the slots are arranged in a one-to-one correspondence with the vertical plug rods, the slots are fixedly installed on one of the horizontal setting surfaces of the rectangular frame, the vertical plug rods arranged corresponding to the slots are fixedly installed on another horizontal setting surface of the rectangular frame, and the central axis of the vertical plug rod and the corresponding slot are located on the same vertical straight line, the plurality of rectangular frames are stacked and connected in sequence from top to bottom in the vertical direction, and two adjacent rectangular frames are connected through the positioning and docking components, and the rectangular frame arranged at the bottom layer is fixedly installed on the combining cavity.

[0013] Preferably, the transport mechanism also includes a transport trolley arranged in the immersed tube section.

[0014] The present invention also discloses a method for accurately adjusting the position of an immersed tube joint. The method adopts the system for accurately adjusting the position of an immersed tube joint. The method comprises the following steps:

[0015] 1) After the drainage of the combined cavity at the joint of two immersed tube sections is completed, the manhole door on the end sealing door is opened, and the gantry hanger is installed between one of the immersed tube sections and the combined cavity, the two supporting frames of the gantry hanger are respectively arranged in the immersed tube section and the combined cavity, and the crossbeam moving track passes through the manhole door;

[0016] 2) Using the gantry hanger to lift the rail transport vehicle and the vehicle track from the immersed tube section to the combined cavity through the manhole door, installing the rail transport vehicle and the vehicle track in the combined cavity, and the vehicle track is arranged in the transverse direction and fixedly installed on the bottom surface of the combined cavity;

[0017] 3) The gantry hanger is used to lift the positioning jack mechanism from the immersed tube section to the combining cavity, and after the jack is transported to a preset installation position in the combining cavity by a rail transport vehicle, the jack is installed; the jack used by the positioning jack mechanism to push the bottom edge of the end sealing door is fixed to the rail transport vehicle through a jack fixing assembly, so that the piston of the jack can push the end sealing door in the longitudinal direction, and after the rail transport vehicle transports the jack used to push the bottom edge of the end sealing door to its preset installation position, the first locking component fixes the relative position between the rail transport vehicle and the driving track, thereby completing the positioning installation of the jack used by the positioning jack mechanism to push the bottom edge of the end sealing door.

[0018] Compared with the prior art, the invention has the beneficial effects of: proposing a precise positioning system and method for immersed tube joints. The precise positioning system and method for immersed tube joints can conveniently realize the transportation and installation of the positioning jack mechanism, facilitate the construction of immersed tube joints, and help improve construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the transport mechanism structure of an embodiment;

[0020] Figure 2 It is a schematic diagram of the state of the lifting and adjusting jack mechanism of the transport mechanism of the embodiment;

[0021] Figure 3 It is a schematic diagram of the gantry hanger structure of an embodiment;

[0022] Figure 4 A schematic structural diagram of a rail transport vehicle according to an embodiment;

[0023] Figure 5 A schematic diagram of the driving track structure of an embodiment;

[0024] Figure 6 It is a schematic diagram of the jack structure of an embodiment;

[0025] Figure 7 It is a structural schematic diagram of the jack piston rod retracted state of the embodiment;

[0026] Figure 8 It is a schematic diagram of the structure of the position adjustment jack mechanism of the embodiment;

[0027] Fig. 9 for Figure 8 A magnified view of part A;

[0028] Fig.10 This is a schematic diagram of the assembly state of the rectangular parallelepiped frame and the jack in the embodiment;

[0029] In the above figure, 1-sunk tube segment, 11-end sealing door, 12-manhole door, 2-combination chamber, 3-jack, 31-piston, 32-cylinder body, 321-first oil port, 322-second oil port, 323-first oil delivery channel, 33-piston rod, 34-cylinder bottom, 35-rod head plug body, 351-saddle, 36-sealing ring, 37-first oil chamber, 38-second oil chamber, 39-third oil chamber, 310-locking nut, 4-gantry hanger, 41- Support frame, 42-beam moving track, 43-lifting hoist, 5-rail transport vehicle, 51-wheel, 52-second height-adjusting support leg, 53-bracket, 6-travel track, 61-first height-adjusting support leg, 62-connecting plate, 63-pin shaft, 7-vertical adjustment unit, 71-vertical mounting frame assembly, 72-rectangular frame, 73-slot, 74-vertical plug rod, 75-limiting plate, 751-bayonet, 8-lateral adjustment unit, 9-transport trolley. DETAILED DESCRIPTION

[0030] The present invention is described in detail below by way of exemplary embodiments. However, it should be understood that elements, structures, and features in one embodiment may also be beneficially combined in other embodiments without further description.

[0031] It should be noted that, in the description of the present invention, the directions or positional relationships indicated by terms such as “inside”, “outside”, “up”, “down”, “left”, “right”, “front” and “back” are based on the positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0032] As shown in the figure, a precise positioning system for a immersed tube segment joint comprises a positioning jack mechanism arranged in a combination cavity 2 of a immersed tube segment 1 joint, the positioning jack mechanism comprises a plurality of jacks 3, and also comprises a transport mechanism, the transport mechanism comprises a gantry hanger 4 for hoisting the jacks 3 between the immersed tube segment 1 and the combination cavity 2, a rail transport vehicle 5 for transporting the jacks 3 in the combination cavity 2, and a travel track 6 adapted to the rail transport vehicle 5; the gantry hanger 4 comprises two support frames 41, a beam moving track 42 arranged between the top ends of the two support frames 41, and a hoisting hoist 43 for hoisting the jacks 3, the hoisting hoist 43 is slidably connected to the beam moving track 42, and the two support frames 41 are respectively provided with In the immersed tube segment 1 and the combined cavity 2, the crossbeam moving track 42 passes through the manhole door 12 of the end sealing door 11 of the immersed tube segment 1; taking the vertical height direction of the combined cavity 2 as the vertical direction, the horizontal length direction of the combined cavity 2 as the horizontal direction, and the horizontal width direction of the combined cavity 2 as the longitudinal direction, the driving track 6 is set as a straight track arranged along the transverse direction, and the driving track 6 is fixedly installed on the bottom surface of the combined cavity 2; a first locking component for fixing the relative position between the rail transport vehicle 5 and the driving track 6 is provided between the rail transport vehicle 5 and the driving track 6, the rail transport vehicle 5 includes a vehicle body and wheels 51 rollingly matched with the driving track 6, and the vehicle body includes a jack fixing component for fixedly connecting the jack 3 to fix the central axis of the piston 31 of the jack 3 in the longitudinal direction.

[0033] A method for accurately adjusting the position of an immersed tube joint, using the aforementioned system for accurately adjusting the position of an immersed tube joint, the method for accurately adjusting the position of an immersed tube joint comprises the following steps:

[0034] 1) After the drainage of the combined cavity 2 at the joint of two immersed tube segments 1 is completed, the manhole door 12 on the end sealing door 11 is opened, and the gantry hanger 4 is installed between one of the immersed tube segments 1 and the combined cavity 2. The two support frames 41 of the gantry hanger 4 are respectively arranged in the immersed tube segment 1 and the combined cavity 2, and the crossbeam moving track 42 passes through the manhole door 12;

[0035] 2) using the gantry hanger 4 to lift the rail transport vehicle 5 and the vehicle track 6 from the immersed tube segment 1 to the combination cavity 2 through the manhole door 12, and installing the rail transport vehicle 5 and the vehicle track 6 in the combination cavity 2, wherein the vehicle track 6 is arranged in a transverse direction and fixedly mounted on the bottom surface of the combination cavity 2;

[0036] 3) The gantry hanger 4 is used to lift the positioning jack mechanism from the immersed tube segment 1 to the combining chamber 2, and the rail transport vehicle 5 is used to transport the jack 3 to a position close to its preset installation position in the combining chamber 2, and then the jack 3 is installed; the jack 3 of the positioning jack mechanism used to push the bottom edge of the end sealing door 11 is fixed to the rail transport vehicle 5 through a jack fixing assembly, so that the piston 31 of the jack 3 can push the end sealing door 11 in the longitudinal direction, and after the rail transport vehicle 5 transports the jack 3 used to push the bottom edge of the end sealing door 11 to its preset installation position, the first locking component fixes the relative position between the rail transport vehicle 5 and the driving track 6, thereby completing the positioning installation of the jack 3 of the positioning jack mechanism used to push the bottom edge of the end sealing door 11.

[0037] The above-mentioned immersed tube joint precision positioning system and immersed tube joint precision positioning method can conveniently realize the transportation and installation of the positioning jack mechanism, which is more convenient for the immersed tube joint positioning construction and is conducive to improving the construction efficiency. In this system, the provision of the rail transport vehicle 5 and the driving track 6 not only facilitates the transportation of the jack 3 in the combination chamber 2, but also can serve as an installation bracket for the jack 3 used to push the bottom edge of the end sealing door 11. The rail transport vehicle 5 transports the jack 3 used to push the bottom edge of the end sealing door 11 to its preset installation position. The jack fixing assembly and the first locking component can realize the fixed installation of the jack 3 in the combination chamber 2, which is more convenient for the installation and use of the positioning jack mechanism of the system, and can reduce the installation space occupied by the positioning system in the combination chamber 2.

[0038] Specifically, the gantry hanger 4 includes a driving mechanism for driving the hoisting hoist 43 to slide on the beam moving track 42. The driving mechanism can be set to any existing gantry hanger driving mechanism that can realize the driving of the hoisting hoist 43.

[0039] Specifically, the driving track 6 includes a first height adjustment component for adjusting the vertical height of the driving track 6. The vertical height position of the driving track 6 can be adjusted by the first height adjustment component, and the position of the jack 3 fixedly mounted on the driving track 6 for pushing the bottom edge of the end sealing door 11 can be further adjusted, thereby achieving the adjustment of the vertical height of the pushing position of the bottom edge of the end sealing door 11 by the jack 3, which is more convenient to adapt to different construction conditions.

[0040] Specifically, the first height adjustment component can be set to any existing structure that can realize track height adjustment. For example, the supporting leg of the traveling track 6 is set to a first height adjustment support leg 61 to serve as the first height adjustment component, and the bottom surface of the first height adjustment support leg 61 is fixedly mounted on the bottom surface of the combining cavity 2.

[0041] Specifically, the rail transport vehicle 5 includes a second height adjustment component for adjusting the vertical height difference between the wheel 51 of the rail transport vehicle 5 and the driving track 6. The vertical height difference between the wheel 51 of the rail transport vehicle 5 and the driving track 6 can be adjusted by the second height adjustment component, and the position of the jack 3 fixedly mounted on the rail transport vehicle 5 for pushing the bottom edge of the end sealing door 11 can be further adjusted, thereby achieving the adjustment of the vertical height of the pushing position of the bottom edge of the end sealing door 11 by the jack 3, which is more convenient to adapt to different construction conditions.

[0042] Specifically, the second height adjustment component can be set to any existing structure that can realize the adjustment of the height difference between the wheel 51 of the rail transport vehicle 5 and the traveling track 6. For example, the second height adjustment component includes a second height adjustment support leg 52 installed on the side wall of the rail transport vehicle 5, and the bottom surface of the second height adjustment support leg 52 can be supported on the traveling track 6.

[0043] Specifically, the first height-adjusting support leg 61 and the second height-adjusting support leg 52 can be set to any existing height-adjustable support leg structure, and the first height-adjusting support leg 61 and the second height-adjusting support leg 52 are both provided in plural numbers.

[0044] Specifically, the jack fixing assembly includes a bracket 53 that can be supported under the side wall of the jack 3, and a second locking component for fixing the relative position between the bracket 53 and the jack 3. The bracket 53 is arranged along the longitudinal direction to position the central axis of the piston 31 of the jack 3 in the longitudinal direction.

[0045] Specifically, the first locking component and the second locking component can be set as any locking structure that can fix the relative position relationship between the two components. For example, the first locking component includes two connecting plates 62 respectively arranged on the rail transport vehicle 5 and the vehicle track 6, and the two connecting plates 62 are provided with interconnected pin holes, and the two pin holes are connected by a pin shaft 63 to fix the relative position of the rail transport vehicle 5 and the vehicle track 6; the second locking component includes two screw holes corresponding to the bracket 53 and the cylinder body 32 of the jack 3, and the two screw holes are fixedly connected by fixing bolts.

[0046] Specifically, the positioning jack mechanism includes a vertical positioning unit 7, a lateral positioning unit 8, and a hydraulic control mechanism for controlling the jacks. The vertical positioning unit 7 is arranged close to the vertical edge of the combination cavity 2. The vertical positioning unit 7 includes a plurality of the jacks 3 arranged vertically, and a vertical mounting frame assembly 71 for fixing the cylinder bodies 32 of the plurality of the jacks 3 arranged vertically. The bottom of the vertical mounting frame assembly 71 is fixedly installed in the combination cavity 2. The lateral positioning unit 8 includes a plurality of the jacks 3 arranged horizontally, The rail transport vehicle 5 is arranged in a one-to-one correspondence with the jack 3 of the lateral positioning unit 8. When the positioning jack mechanism is in operation, the jack 3 of the lateral positioning unit 8 is fixedly installed on the rail transport vehicle 5 corresponding to it. The multiple jacks 3 of the lateral positioning unit 8 are arranged along the driving track 6, and the multiple rail transport vehicles 5 are fixed on the driving track 6 by the first locking component; the pistons 31 of the jacks 3 are all arranged close to the end sealing door 11 of the immersed tube segment 1 and can push the end sealing door 11 in the longitudinal direction. The above-mentioned positioning jack mechanism includes a vertical positioning unit 7 and a horizontal positioning unit 8, and the vertical side and horizontal bottom side of the end sealing door 11 can be pushed respectively by the vertical positioning unit 7 and the horizontal positioning unit 8. At the same time, the pushing state of each jack 3 of the vertical positioning unit 7 and the horizontal positioning unit 8 is adjusted by the hydraulic control mechanism, so that the precise positioning of the joint of the immersed tube section 1 can be conveniently achieved. In the above-mentioned embodiment, the jack 3 of the horizontal positioning unit 8 is the aforementioned jack 3 used to push the bottom side of the end sealing door 11, and the positioning and installation of the horizontal positioning unit 8 can be conveniently achieved by using the driving track 6 and the rail transport vehicle 5.

[0047] Specifically, one end of the vertical positioning unit 7 is disposed close to one end of the horizontal positioning unit 8 to form an L-shaped positioning jack mechanism.

[0048] Specifically, the jack 3 includes a cylinder body 32, a piston 31 that is slidably sealed with the inner wall of the cylinder body 32, a piston rod 33, and a first oil port 321 and a second oil port 322 opened in the cylinder body 32. One end of the cylinder body 32 is set as a cylinder bottom 34, and the other end is set as a cylinder opening. The two ends of the piston rod 33 are respectively fixedly mounted with the piston 31 and the rod head plug body 35. The radial dimensions of the piston 31 and the rod head plug body 35 are larger than the radial dimensions of the piston rod 33. The cylinder opening is sleeved on the rod head plug 35, and the rod head plug 35 and the cylinder opening are slidably sealed along the axial direction of the piston rod 33; the inner wall of the cylinder 32 is fixedly installed with a sealing ring 36, and the sealing ring 36 and the cylinder bottom 34 are respectively arranged on both sides of the piston 31, and the sealing ring 36 is sleeved on the piston rod 33, and the piston rod 33 and the sealing ring 36 are slidably sealed along the axial direction of the piston rod 33; the inner wall of the cylinder 32, the sealing ring The space surrounded by the rod head plug body 35 and the rod head plug body 36 constitutes a first oil chamber 37, the space surrounded by the inner wall of the cylinder body 32, the piston 31 and the sealing ring 36 constitutes a second oil chamber 38, and the space surrounded by the inner wall of the cylinder body 32, the cylinder bottom 34 and the piston 31 constitutes a third oil chamber 39; the first oil port 321 is connected to the first oil chamber 37 and the third oil chamber 39, and the second oil port 322 is connected to the second oil chamber 38; the cylinder body 32, the cylinder opening, The piston 31, the piston rod 33, the sealing ring 36, and the rod head plug body 35 are all coaxially arranged with their central axes, and the outer wall of the rod head plug body 35 is set to be cylindrical; the piston rod 33 is provided with an elastic seal for sealing the gap between the piston 31 and the inner wall of the cylinder body 32, the inner ring of the sealing ring 36 is provided with an elastic seal for sealing the gap between the piston rod 33 and the sealing ring 36, and the rod head plug body 35 is provided with an elastic seal for sealing the rod head plug body 35 and the opening of the cylinder body.

[0049] The first oil chamber 37 and the third oil chamber 39 of the jack 3 with the above structure are the jack 3 pushing working chambers, and are connected to the first oil port 321 at the same time. When the jack 3 is pushing, the two oil chambers are filled with oil at the same time. The added effect can increase the pushing force area of ​​the jack 3, thereby achieving the purpose of increasing the thrust of the jack 3. The two chambers are the oil inlet chamber when the piston rod 33 is extended, and the oil return chamber when the piston rod 33 is retracted. The second oil chamber 38 is the retraction chamber of the jack 3, which is connected to the second oil port 322. When the jack 3 is pushing, the second oil chamber 38 is filled with oil to push the piston rod 33 to retract the cylinder body 32. By improving the structure of the jack 3, the jack 3 can achieve an increase in the thrust of the jack 3 without substantially increasing the volume and deadweight of the jack 3, which is more conducive to the positioning operation.

[0050] Specifically, the jack 3 also includes a self-locking structure for fixing the position of the piston rod 33 to prevent it from retracting. The self-locking structure includes an external thread provided on the outer wall of the rod head plug body 35, and a locking nut 310 sleeved on the rod head plug body 35. The internal thread of the locking nut 310 is adapted to the external thread of the rod head plug body 35. The locking nut 310 is provided outside the cylinder body 32 and can abut against the opening of the cylinder body. When the self-locking structure is set up, when the piston rod 33 is extended to the target position, its position is fixed by the self-locking structure, which can prevent the piston rod 33 from retracting during the jacking process and reduce equipment failures.

[0051] Specifically, the force-applying surface of the rod head plug body 35 for pushing the force-bearing object is provided with a saddle 351, and the saddle 351 is a rotating structure that can slide and rotate relative to the force-applying surface. The saddle 351 is used for the rod head plug body 35 to contact with the force-bearing object, and has the function of automatic calibration and leveling, so that the rod head plug body 35 can contact with the force-bearing object more fully and the force is more evenly applied.

[0052] Specifically, the force-applying surface is provided with an arc-shaped concave surface, and the contact surface between the saddle 351 and the rod head plug body 35 is set as an arc-shaped convex surface matching the arc-shaped concave surface. The saddle 351 can slide along the arc-shaped concave surface so that the saddle 351 can adjust the flatness of the contact surface between the rod head plug body 35 and the force-bearing object by sliding and rotating.

[0053] Specifically, the elastic sealing members are all configured as rubber sealing rings.

[0054] Specifically, the cylinder body 32 is provided with a first oil delivery channel 323 and a second oil delivery channel, the first oil port 321 is connected to the first oil chamber 37 and the third oil chamber 39 through the first oil delivery channel 323, and the second oil port 322 is connected to the second oil chamber 38 through the second oil delivery channel.

[0055] Specifically, the vertical mounting frame assembly 71 includes a plurality of rectangular parallelepiped frames 72, and the rectangular parallelepiped frames 72 are arranged one by one with the jacks 3 of the vertical positioning unit 7; the top and bottom surfaces of the rectangular parallelepiped frames 72 are both set as horizontal setting surfaces, and the rectangular parallelepiped frames 72 are sleeved outside the cylinder body 32 of the jack 3 arranged corresponding thereto and are fixedly connected to the cylinder body 32, and the rectangular parallelepiped frames 72 also include a plurality of positioning docking assemblies, and the positioning docking assemblies include vertically arranged slots 73 and vertical plug rods 74 adapted to the slots 73, and the slots 73 and the vertical plug rods 74 are connected to each other. The slots 73 are arranged in a one-to-one correspondence, and are fixedly mounted on one of the horizontally mounted surfaces of the rectangular frame 72. The vertical plug rod 74 corresponding to the slots 73 is fixedly mounted on the other horizontally mounted surface of the rectangular frame 72. The central axis of the vertical plug rod 74 and the corresponding slots 73 are located on the same vertical straight line. A plurality of the rectangular frames 72 are stacked and connected in sequence from top to bottom in the vertical direction, and two adjacent rectangular frames 72 are connected by the positioning docking assembly. The rectangular frame 72 at the bottom layer is fixedly mounted on the combining cavity 2.

[0056] The vertical positioning unit 7 includes a plurality of jacks 3 with rectangular frames 72 stacked and connected in sequence from top to bottom. The two adjacent layers of the rectangular frames 72 are connected by inserting the slots 73 on the docking surfaces and the vertical plug rods 74, and the upper and lower layers of the jacks 3 are stably connected in coordination with the gravity. Through the setting of the rectangular frame 72 with the positioning docking assembly, it is convenient to realize the precise positioning and assembly of multiple jacks 3 to form the vertical positioning unit 7, and it is convenient to assemble the force application surfaces of multiple jacks 3 on the same plane, so as to increase the thrust of the vertical positioning unit 7 by superimposing the jacks 3, and improve the assembly efficiency and construction efficiency of the device.

[0057] Specifically, there are four slots 73, which are fixedly mounted on the four corners of the top surface of the rectangular parallelepiped frame 72, and the slots 73 are opened upward. There are four vertical plug rods 74, which are fixedly mounted on the four corners of the bottom surface of the rectangular parallelepiped frame 72, and the vertical plug rods 74 are vertically downward from the bottom surface of the rectangular parallelepiped frame 72. When the vertical adjustment unit 7 is assembled, the vertical plug rods 74 of the upper rectangular parallelepiped frame 72 are plugged into the slots 73 of the lower rectangular parallelepiped frame 72 to achieve the connection between the two rectangular parallelepiped frames 72.

[0058] Specifically, the connecting component between the rectangular parallelepiped frame 72 and the jack 3 includes a limit plate 75 fixedly installed in the rectangular parallelepiped frame 72, and the limit plate 75 is provided with a bayonet 751 for engaging the outer wall of the cylinder body 32, and the bayonet 751 is sleeved outside the outer wall of the cylinder body 32. The limit plate 75 can be used to fix the jack 3 and the rectangular parallelepiped frame 72. In addition to the limit plate 75 structure, the connecting component connecting the rectangular parallelepiped frame 72 and the jack 3 can also use any fixed connection structure to connect the jack 3 and the rectangular parallelepiped frame 72. The limit plate 75 can be fixedly installed on the rectangular parallelepiped frame 72 in any fixed connection manner, such as the limit plate 75 can be welded to the rectangular parallelepiped frame 72.

[0059] Specifically, the transport mechanism further includes a transport trolley 9 provided in the immersed tube segment 1. The transport trolley 9 provided in the immersed tube segment 1 can be used to transport the structural device constituting the position adjustment jack mechanism in the immersed tube segment 1, so as to facilitate the transportation and installation of the position adjustment jack mechanism.

[0060] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A precise positioning system for an immersed tube joint, comprising a positioning jack mechanism disposed in a coupling cavity of an immersed tube joint, wherein the positioning jack mechanism comprises a plurality of jacks, and is characterized in that: It also includes a transport mechanism, which includes a gantry hanger for lifting the jack between the immersed tube section and the combining cavity, a rail transport vehicle for transporting the jack in the combining cavity, and a driving track adapted to the rail transport vehicle; the gantry hanger includes two support frames, a beam moving track arranged between the top ends of the two support frames, and a lifting hoist for lifting the jack, the lifting hoist is slidably connected to the beam moving track, the two support frames are respectively arranged in the immersed tube section and the combining cavity, the beam moving track passes through the ends of the immersed tube section A manhole door with a sealed door; the vertical height direction of the combined cavity is taken as the vertical direction, the horizontal length direction of the combined cavity is taken as the horizontal direction, and the horizontal width direction of the combined cavity is taken as the longitudinal direction, the vehicle track is set as a straight track arranged along the transverse direction, and the vehicle track is fixedly installed on the bottom surface of the combined cavity; a first locking component for fixing the relative position between the rail transport vehicle and the vehicle track is provided between the rail transport vehicle and the vehicle track, the rail transport vehicle includes a vehicle body and wheels that roll with the vehicle track, and the vehicle body includes a jack fixing assembly for fixedly connecting the jack to fix the central axis of the piston of the jack in the longitudinal direction; The positioning jack mechanism includes a vertical positioning unit, a lateral positioning unit, and a hydraulic control mechanism for controlling the jacks. The vertical positioning unit is arranged near the vertical edge of the combining cavity. The vertical positioning unit includes a plurality of jacks arranged vertically and a vertical mounting frame assembly for fixing the cylinders of the plurality of jacks arranged vertically, and the bottom of the vertical mounting frame assembly is fixedly installed in the combining cavity; the lateral positioning unit includes a plurality of jacks arranged horizontally, the rail transport vehicle and the jacks of the lateral positioning unit are arranged one by one correspondingly, when the positioning jack mechanism is operating, the jacks of the lateral positioning unit are fixedly installed on the rail transport vehicle corresponding to the jacks, the plurality of jacks of the lateral positioning unit are arranged along the vehicle track, and the plurality of rail transport vehicles are fixed on the vehicle track by a first locking component; the pistons of the jacks are all arranged near the end sealing door of the immersed tube section and can push the end sealing door in the longitudinal direction.

2. The immersed tube joint precision positioning system according to claim 1 is characterized in that: The gantry hanger includes a driving mechanism for driving the hoisting hoist to slide on the beam moving track; the traveling track includes a first height adjusting component for adjusting the vertical height of the traveling track, and the rail transport vehicle includes a second height adjusting component for adjusting the vertical height difference between the wheels of the rail transport vehicle and the traveling track.

3. The immersed tube joint precision positioning system according to claim 2 is characterized in that: The first height adjustment component is configured as a first height adjustment support leg installed on the traveling track, and the bottom surface of the first height adjustment support leg is fixedly installed on the bottom surface of the combining cavity; the second height adjustment component includes a second height adjustment support leg installed on the rail transport vehicle, and the bottom surface of the second height adjustment support leg can be supported on the traveling track.

4. The immersed tube joint precision positioning system according to claim 1 is characterized in that: The jack fixing assembly includes a bracket that can be supported under the side wall of the jack, and a second locking component for fixing the relative position between the bracket and the jack. The bracket is arranged in the longitudinal direction to position the central axis of the piston of the jack in the longitudinal direction.

5. The immersed tube joint precision positioning system according to claim 1 is characterized in that: One end of the vertical positioning unit is arranged close to one end of the horizontal positioning unit to form an L-shaped positioning jack mechanism.

6. The immersed tube joint precision positioning system according to claim 1 is characterized in that: The jack includes a cylinder body, a piston that is slidably sealed with the inner wall of the cylinder body, a piston rod, and a first oil port and a second oil port opened in the cylinder body. One end of the cylinder body is set as a cylinder bottom, and the other end is set as a cylinder body opening. The piston and the rod head plug body are fixedly installed at both ends of the piston rod, and the radial dimensions of the piston and the rod head plug body are larger than the radial dimensions of the piston rod. The cylinder body opening is sleeved on the rod head plug body, and the rod head plug body and the cylinder body opening are slidably sealed along the axial direction of the piston rod; a sealing ring is fixedly installed on the inner wall of the cylinder body, and the sealing ring and the cylinder bottom are respectively arranged on both sides of the piston, and the sealing ring is sleeved on the piston rod, and the piston rod and the sealing ring are slidably sealed along the axial direction of the piston rod; the inner wall of the cylinder body, the sealing ring and the The space surrounded by the rod head plug body constitutes a first oil chamber, the space surrounded by the inner wall of the cylinder body, the piston and the sealing ring constitutes a second oil chamber, and the space surrounded by the inner wall of the cylinder body, the cylinder bottom and the piston constitutes a third oil chamber; the first oil port connects the first oil chamber and the third oil chamber, and the second oil port connects the second oil chamber; the cylinder body, the cylinder body opening, the piston, the piston rod, the sealing ring, and the rod head plug body are all coaxially arranged with their central axes, and the outer side wall of the rod head plug body is set to be cylindrical; the piston rod is provided with an elastic seal for sealing the gap between the piston and the inner wall of the cylinder body, the inner ring of the sealing ring is provided with an elastic seal for sealing the gap between the piston rod and the sealing ring, and the rod head plug body is provided with an elastic seal for sealing the rod head plug body and the cylinder body opening.

7. The immersed tube joint precision positioning system according to claim 1 is characterized in that: The vertical mounting frame assembly includes a plurality of rectangular frames, and the rectangular frames are arranged one-to-one with the jacks of the vertical positioning unit; the top surface and the bottom surface of the rectangular frame are both set as horizontal setting surfaces, and the rectangular frame is sleeved on the cylinder body of the jack arranged correspondingly thereto and is fixedly connected to the cylinder body, and the rectangular frame also includes a plurality of positioning and docking assemblies, and the positioning and docking assemblies include vertically arranged slots and vertical plug rods adapted to the slots, and the slots are arranged one-to-one with the vertical plug rods, and the slots are fixedly installed on one of the horizontal setting surfaces of the rectangular frame, and the vertical plug rods arranged corresponding to the slots are fixedly installed on another horizontal setting surface of the rectangular frame, and the central axis of the vertical plug rod and the corresponding slot are located on the same vertical straight line, and the plurality of the rectangular frames are stacked and connected in sequence from top to bottom in the vertical direction, and two adjacent rectangular frames are connected by the positioning and docking assembly, and the rectangular frame arranged at the bottom layer is fixedly installed on the combining cavity.

8. The immersed tube joint precision positioning system according to claim 1 is characterized in that: The transport mechanism also includes a transport trolley arranged in the immersed tube section.

9. A method for accurately adjusting the position of an immersed tube joint, characterized in that: The immersed tube joint precision positioning system according to any one of claims 1 to 8 is used, and the immersed tube joint precision positioning method comprises the following steps: 1) After the drainage of the combined cavity at the joint of two immersed tube sections is completed, the manhole door on the end sealing door is opened, and the gantry hanger is installed between one of the immersed tube sections and the combined cavity, the two supporting frames of the gantry hanger are respectively arranged in the immersed tube section and the combined cavity, and the crossbeam moving track passes through the manhole door; 2) Using the gantry hanger to lift the rail transport vehicle and the vehicle track from the immersed tube section to the combined cavity through the manhole door, installing the rail transport vehicle and the vehicle track in the combined cavity, and the vehicle track is arranged in the transverse direction and fixedly installed on the bottom surface of the combined cavity; 3) The gantry hanger is used to lift the positioning jack mechanism from the immersed tube section to the combining cavity, and after the jack is transported to a preset installation position in the combining cavity by a rail transport vehicle, the jack is installed; the jack used by the positioning jack mechanism to push the bottom edge of the end sealing door is fixed to the rail transport vehicle through a jack fixing assembly, so that the piston of the jack can push the end sealing door in the longitudinal direction, and after the rail transport vehicle transports the jack used to push the bottom edge of the end sealing door to its preset installation position, the first locking component fixes the relative position between the rail transport vehicle and the driving track, thereby completing the positioning installation of the jack used by the positioning jack mechanism to push the bottom edge of the end sealing door.

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