A sinking device for a sinking tube in a confined space

Abstract

The application relates to the technical field of sinking pipe sinking auxiliary equipment, and particularly discloses a sinking device for sinking a sinking pipe in a limited space, which comprises a plurality of floating cranes; two oppositely arranged floating boxes are arranged on the floating cranes; winches and fixed pulleys are arranged on the floating boxes; the fixed pulleys are arranged at the edges of the floating boxes; the steel wire ropes on the winches are connected to lifting points on a large-diameter steel pipe after passing through the fixed pulleys; the plurality of floating cranes are arranged at equal intervals along the axial direction of the large-diameter steel pipe; and the floating cranes and the floating boxes are used for bearing force when the sinking pipe is sinking. The floating boxes are arranged on one side of the floating cranes, the winches and the fixed pulleys are arranged on the floating boxes and connected to the lifting points of the large-diameter steel pipe, the floating cranes and the floating boxes are used for hoisting the middle section of the large-diameter steel pipe in the limited space, force bearing is carried out, the hoisting operation of the lifting arms of the floating cranes is replaced, the force bearing of the middle part of the large-diameter steel pipe in the limited space is ensured, and the sinking operation of the large-diameter steel pipe is ensured to be carried out smoothly.

Description

Technical Field

[0001] This invention relates to the field of auxiliary equipment for immersed tube sinking, and specifically to a device for sinking immersed tubes in confined spaces. Background Technology

[0002] Immersed pipe sinking refers to the sinking operation of large-diameter steel pipes. Large-diameter steel pipes refer to steel pipes with an outer diameter of 100 mm or more, and are divided into two main categories: seamless steel pipes and welded steel pipes. They are mainly formed into composite pipe bodies using coating processes such as polyvinyl chloride (PVC), polyethylene (PE), and epoxy resin (EPOZY), with a maximum diameter of up to 1200 mm. The products have the characteristics of resistance to strong acid and alkali corrosion and resistance to thermal cycling (-40℃~80℃). The smooth pipe surface does not easily adhere to substances, which can reduce the transport resistance and ensure the hygiene of the fluid. They are suitable for fluid transportation in fields such as petroleum, natural gas, chemical, pharmaceutical, power, and urban pipe networks.

[0003] During the lifting and lowering of large-diameter steel pipes, the pipes need to be turned and adjusted, resulting in greater stress on both sides. Therefore, large lifting equipment such as crawler cranes are typically used for lifting. The middle section of the large-diameter steel pipe floats on the water surface, and a floating crane is usually used to lift and support this section, assisting in the lowering of the pipe.

[0004] When high-voltage lines are installed above the water surface during actual construction, the floating crane will be interfered with by the high-voltage lines (limited in height) and cannot carry out normal construction. Therefore, it is necessary to propose a device for sinking pipes in confined spaces. Summary of the Invention

[0005] The purpose of this invention is to provide a device for sinking tubes in confined spaces, so as to solve the problem that floating cranes cannot carry out sinking operations in confined spaces.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a device for sinking a tube in a confined space, comprising multiple floating cranes; The floating crane vessel is equipped with two opposing pontoons. Each pontoon is equipped with a winch and a fixed pulley; the fixed pulley is located on the edge of the pontoon, and the wire rope on the winch passes around the fixed pulley and is connected to the lifting point on the large-diameter steel pipe. Multiple floating cranes are set at equal intervals along the axial direction of the large-diameter steel pipe; Floating cranes and pontoons are used to support the load when large-diameter steel pipes are being lowered.

[0007] As a further technical solution of the above invention, multiple floating cranes are respectively set on both sides of the large-diameter steel pipe.

[0008] As a further technical solution of the above invention, it also includes a movable pulley installed on the pontoon, and the wire rope of the winch passes through the fixed pulley and the movable pulley and is connected to the lifting point of the large-diameter steel pipe.

[0009] Compared with the prior art, the present invention has the following advantages and beneficial effects: By setting up a pontoon on one side of the floating crane vessel, and installing a winch and fixed pulley on the pontoon to connect to the lifting points set on the large-diameter steel pipe, the middle section of the large-diameter steel pipe is suspended by the floating crane vessel and the pontoon in a confined space to bear the load, replacing the lifting operation of the floating crane vessel's boom. This ensures the stability of the middle section of the large-diameter steel pipe within the confined space and guarantees the smooth sinking operation of the large-diameter steel pipe. Attached Figure Description

[0010] Figure 1 This is a three-dimensional structural diagram of the device in use.

[0011] Figure 2 This is a three-dimensional structural diagram of the device.

[0012] Figure 3 This is a schematic diagram showing the usage status of this device.

[0013] Figure 4 This is a structural schematic diagram of a floating crane vessel.

[0014] Figure 5 This is a schematic diagram showing the floating crane moving directly above a large-diameter steel pipe for hoisting.

[0015] The labels in the diagram are as follows: Floating crane - 1; Floating box - 2; Winch - 3; Fixed pulley - 4. Detailed Implementation

[0016] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, so as to provide a better understanding of the concept of the present invention, the technical problem solved, the technical features constituting the technical solution, and the technical effects brought about.

[0017] like Figures 1-5 As shown, a device for sinking a tube in a confined space includes multiple floating cranes 1; The floating crane vessel 1 is equipped with two opposing pontoons 2. Each pontoon 2 is equipped with a winch 3 and a fixed pulley 4; the fixed pulley 4 is located on the edge of the pontoon 2, and the wire rope on the winch 3 passes around the fixed pulley 4 and is connected to the lifting point on the large-diameter steel pipe; Multiple floating cranes 1 are arranged at equal intervals along the axial direction of the large-diameter steel pipe; The floating crane 1 and the pontoon 2 are used to support the load when large-diameter steel pipes are sunk.

[0018] When using this device, both ends of the large-diameter steel pipe have already been lifted and adjusted by crawler cranes. Multiple floating cranes 1 are positioned along the axial direction of the large-diameter steel pipe to bear load at various points. During the immersion of the large-diameter steel pipe in water, the wire rope of the winch 3 passes through the fixed pulley 4 and connects to the lifting lugs on the large-diameter steel pipe. Multiple floating cranes 1 pull the middle of the large-diameter steel pipe, achieving stable control throughout the entire process of "suspension—balance—sinking—positioning." In confined spaces such as those with high-voltage lines, where excessive vertical distance is not required, the floating cranes 1 can operate while floating on the water surface. Before the large-diameter steel pipe is fully submerged, the floating cranes 1 float beside the pipe. Once the large-diameter steel pipe is completely submerged, the floating cranes 1 float directly above it for easier sinking operations.

[0019] like Figure 1 As shown, in a preferred embodiment, multiple floating cranes 1 are respectively arranged on both sides of the large-diameter steel pipe. In this embodiment, multiple floating cranes 1 are arranged on both sides of the large-diameter steel pipe. By setting the same number of floating cranes 1 on both sides of the large-diameter steel pipe, the large-diameter steel pipe is subjected to more uniform force during sinking, making it less prone to capsizing.

[0020] In a preferred embodiment, a movable pulley is also included on the pontoon 2. The wire rope of the winch 3 passes over the fixed pulley 4 and the movable pulley before connecting to the lifting point of the large-diameter steel pipe. The movable pulley, added in this embodiment, acts as a labor-saving component, making it easier for the floating crane 1 to lift the large-diameter steel pipe. In practical use, multiple sets of fixed pulleys 4 and movable pulleys can be used in combination, with eight or more sets of wire ropes wound together to improve stability during lifting.

[0021] This invention abandons the traditional high-rise floating crane lifting section and uses low-lying pontoons that float directly on the water surface. The floating crane vessel serves as an existing foundation. The pontoons on both sides of the floating crane vessel are moved to different positions, and the floating crane vessel is placed on the same side, thus constructing a low-altitude working platform. This avoids the restrictions imposed by overhead high-voltage lines and other obstacles. During the descent of the large-diameter steel pipe, the platform moves directly above the large-diameter steel pipe, maintaining effective support for the middle section of the large-diameter steel pipe.

[0022] This invention has the following characteristics: 1. Precise operation timing (intervention during water injection period); This invention clearly defines the timing of the operation as the water injection and sinking stage of the large-diameter steel pipe. After the large-diameter steel pipe is uprighted and initially positioned by crawler cranes at both ends, the middle section needs to be provided with auxiliary support to resist the negative buoyancy generated by water injection. Only then do the middle pontoon and floating crane begin to operate, with precise functional positioning, avoiding cross-interference with the turning process.

[0023] 2. Strong adaptability to low altitudes (avoids high-voltage lines); To address the limitations imposed by high-voltage power lines, this invention employs a low-profile steel floating pontoon as the base platform, with its operating height significantly lower than the safe distance from the power lines. The pontoon floats directly on the water surface, creating a stable baseline for "water-skimming" operations and completely resolving the issue of limited clearance.

[0024] 3. Ingenious force conversion (pulley block traction); Unlike floating cranes that directly lift vertically, this invention utilizes mechanical principles to convert force. Fixed pulleys are installed at the edge of the pontoon, forming a pulley system in conjunction with a winch and movable pulleys in the middle section of a large-diameter steel pipe. By winding and unwinding the wire rope, the horizontal traction force of the winch is converted into a vertical upward pulling force on the middle section of the large-diameter steel pipe, achieving a technological breakthrough of "replacing vertical force with horizontal force."

[0025] 4. Dynamic follow-up support; Multiple pontoons are evenly spaced along the axial direction of the large-diameter steel pipe. During the process of the large-diameter steel pipe being filled with water and sinking, the pontoons are not fixed in place, but gradually drift from the side to directly below the large-diameter steel pipe as the position of the large-diameter steel pipe changes, always maintaining effective support for the middle section of the large-diameter steel pipe, ensuring balanced force and stable attitude during the sinking process.

[0026] The following principle is utilized in this invention: Low-altitude platform principle: Using a sealed steel structure pontoon as the basic buoyancy platform, its height is usually only 1 to 2 meters, far below the safety distance of high-voltage lines, thus creating a safe benchmark for surface operations.

[0027] The principle of force direction conversion: A fixed pulley is installed on the top side of the pontoon, and the wire rope passes around the fixed pulley and the movable pulley on the middle section of the large-diameter steel pipe. When the winch horizontally winds up and unwinds the wire rope, the pulley system decomposes the horizontal traction force and synthesizes it into a vertically upward component force, thereby lifting the middle section of the large-diameter steel pipe and sharing the weight when it sinks under water.

[0028] Dynamic equilibrium principle: The pontoon moves along the descent trajectory of the large-diameter steel pipe. Initially (before water injection), the pontoon is located to the side of the large-diameter steel pipe, providing an upward pulling force. As the large-diameter steel pipe is filled with water and sinks, the pontoon moves towards the center of the large-diameter steel pipe under the combined force of buoyancy and pulling force, eventually located directly above the large-diameter steel pipe, providing a vertical upward support force and ensuring a smooth transition of force throughout the entire water injection and sinking process.

[0029] In this invention, a pontoon is used as a basic buoyancy platform, and its height is usually only 1-2 meters, which is far below the safe distance of high-voltage lines, thus creating a safe benchmark for water surface operations.

[0030] A fixed pulley is installed on the top side of the pontoon, and the wire rope passes through the fixed pulley and the movable pulley to connect to the lifting point of the middle section of the immersed tube. When the winch horizontally winds up and down the wire rope, the pulley system decomposes the horizontal traction force and combines it into a vertical upward component, thereby lifting the middle section of the immersed tube and sharing the weight during water injection and sinking.

[0031] The pontoon moves along the sinking trajectory of the immersed tube. Initially (before water is injected), the pontoon is located to the side of the immersed tube, providing an upward pulling force. As the immersed tube sinks with water, the pontoon moves towards the center of the immersed tube under the combined force of buoyancy and pulling force, and eventually is located directly above the immersed tube, providing a vertical upward support force to ensure a smooth transition of force throughout the entire water injection and sinking process.

[0032] The terms "connection" and "fixing" appearing in the description of this invention can refer to fixed connection, processing and forming, welding, or mechanical connection. The specific meaning of the above terms in this invention should be understood according to the specific circumstances.

[0033] In the description of this invention, the terms "center," "upper," "lower," "horizontal," "inner," and "outer," etc., are used only to indicate the orientation or positional relationship for the convenience of describing this invention and to simplify the description, and do not indicate or imply a specific orientation that the device or element referred to must have, and therefore should not be construed as a limitation of this invention.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for sinking a tube in a confined space, characterized in that: Including multiple floating crane vessels (1); The floating crane vessel (1) is equipped with two oppositely arranged pontoons (2). Each pontoon (2) is equipped with a winch (3) and a fixed pulley (4); the fixed pulley (4) is located on the edge of the pontoon (2), and the wire rope on the winch (3) passes around the fixed pulley (4) and is connected to the lifting point on the large-diameter steel pipe; Multiple floating cranes (1) are set at equal intervals along the axial direction of the large-diameter steel pipe; The floating crane (1) and the pontoon (2) are used to support the load when large-diameter steel pipes are sunk.

2. The device for sinking a tube in a confined space according to claim 1, characterized in that: Multiple floating cranes (1) are respectively set on both sides of the large-diameter steel pipe.

3. The device for sinking a tube in a confined space according to claim 1, characterized in that: It also includes a movable pulley set on the pontoon (2), and the wire rope of the winch (3) is connected to the lifting point of the large-diameter steel pipe after passing around the fixed pulley (4) and the movable pulley.

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