Cable crane and crossing type laying method for long-distance pipeline in complex terrain

Abstract

The invention discloses a cable crane and a crossing type laying method for a long-distance pipeline in a complex terrain, and the crossing type laying method for the long-distance pipeline in the complex terrain comprises the following steps: step 1, erecting the cable crane at the complex terrain according to a preset pipeline laying line, supporting piers which are distributed at intervals are sequentially arranged at the complex terrain along the pipe laying line; 2, the pipelines are hoisted and erected on the supporting piers one by one through a cable crane, welding treatment is conducted on every two adjacent pipelines till the pipelines at the complex terrain are erected in a spanning mode, and therefore the cable crane can span a complex terrain area along a preset pipeline laying line in advance; then, supporting piers are arranged in the complex terrain area according to a preset pipe laying line, the pipelines are conveyed to the complex terrain area one by one through a cable crane and erected on the supporting piers in sequence, and the butt joint ends of every two adjacent pipelines are welded.

Description

Technical Field

[0001] The invention belongs to the technical field of long-distance pipeline erection, and in particular relates to a cable crane and a leap-forward laying method for long-distance pipelines in complex terrain. Background Art

[0002] In the construction of long-distance oil and gas pipelines, due to the different geomorphological features in various places, especially in mountainous areas, water network areas, swamp areas or obstacle crossing areas, the construction of pipelines is difficult. For example, it is difficult to build roads in mountainous areas, and it is difficult for pipeline construction engineering machinery to reach the construction area smoothly. The steep slopes make pipeline transportation extremely difficult, and there is a lack of stable foundation for equipment placement. In addition, the climate in mountainous areas is changeable and natural disasters occur frequently, which further increases the safety risks of construction and seriously affects the construction efficiency and progress. In the water network areas with crisscrossing rivers and lakes, it is difficult for pipeline construction machinery to enter the construction area to carry out operations, and seasonal water level changes and water flow impacts also have a huge impact on construction equipment. The obstruction of the water network not only increases the difficulty of construction, but also greatly increases the construction cost. For swamp areas, due to long-term water accumulation, the soil is soft and muddy, and the bearing capacity is extremely poor. Once the engineering machinery enters, it is very easy to get stuck in it and cannot operate normally. The complex ecological environment and humid climate conditions bring great inconvenience to the work of construction personnel, seriously restricting the speed and quality of construction, and the construction cost is high. Summary of the invention

[0003] In order to solve the above technical problems, one of the objectives of the present invention is to provide a laying method for laying pipelines in complex terrain with high efficiency and low cost.

[0004] In order to achieve the above object, the technical solution of the present invention is as follows: a method for laying a long-distance pipeline in a complex terrain in a leapfrog manner, comprising the following steps:

[0005] Step 1: Install a cable crane in a complex terrain according to the pre-set pipe-laying route, and set up support piers at intervals along the pipe-laying route in the complex terrain;

[0006] Step 2: The cable crane hoists the pipelines one by one to the support piers, and welds two adjacent pipelines until the pipelines are installed in a spanning manner in the complex terrain.

[0007] The beneficial effect of the above technical solution is that: in this way, the cable crane can be placed in advance along the preset pipe-laying route across the complex terrain area, and then support piers can be set up in the complex terrain area according to the preset pipe-laying route, and the cable crane can drop the pipes one by one to the complex terrain area, and set up on the support piers in sequence, and the butt ends of two adjacent pipes can be welded.

[0008] The complex terrain described in the above technical solution is a mountainous area, a water network area, a swamp area or an obstacle crossing area.

[0009] The beneficial effect of the above technical solution is that the terrain is complex and difficult for operating equipment to reach, and the laying method can be used to lay pipelines efficiently and at low cost.

[0010] In step 2 of the above technical solution, an internal welding machine is arranged in the pipeline to perform root welding operation.

[0011] The beneficial effects of the above technical solution are: it has good welding effect and can realize automatic welding.

[0012] The cable crane described in the above technical solution has two independently liftable lifting points, and the two lifting points are respectively installed at the two ends of the pipeline.

[0013] The beneficial effect of the above technical solution is that after the pipeline is hoisted, the heights of both ends of the pipeline can be adjusted independently to be placed on the supporting pier.

[0014] A second object of the present invention is to provide a cable crane which has a simple structure and can realize pipeline installation with high efficiency and low cost.

[0015] In order to achieve the above-mentioned purpose, another technical solution of the present invention is as follows: A cable crane is used in the method for leapfrogging long-distance pipelines in complex terrain as described above, comprising a suspension cable, a moving head, two support frames and two lifting pieces, a support frame placed upright on the ground is arranged at each end of the suspension cable to suspend the suspension cable above the complex terrain according to the pipeline laying route, the moving head is self-powered and hung on the suspension cable, and can move relative to the suspension cable on the suspension cable, two lifting pieces are installed on the moving head at intervals, the lifting piece has a suspension cable, and the lifting end of the suspension cable is used to be detachably connected to the corresponding end of the pipeline.

[0016] The beneficial effect of the above technical solution is that: by adopting two support frames to set up the suspension cable along the pipe laying line, the moving head is set on the suspension cable and can move flexibly on the suspension cable, and the two lifting parts set on the moving head correspond to the two suspension cables that can be connected to the two ends of the pipeline to lift the pipeline into the air, and under the action of the moving head, it is transported to the position corresponding to the pipe laying line in the complex terrain area, and at the same time the pipeline is placed on the supporting pier.

[0017] The moving head in the above technical solution includes a tubular beam and a driving member, the cable passes through the inner hole of the tubular beam, the driving member is installed in the middle of the tubular beam and is transmission-connected to the cable, the two lifting members are respectively installed at both ends of the tubular beam, and the moving head is used to drive the tubular beam to move on the cable along the length direction of the cable.

[0018] The beneficial effect of the above technical solution is that the pipe beam will not rotate on the suspension cable and will not fall on the suspension beam, thereby improving the safety of its operation.

[0019] The driving member in the above technical solution includes a driving motor and a driving sheave. The driving motor is installed in the middle part corresponding to the length direction of the tubular beam, and its driving end extends into the interior of the tubular beam. The driving sheave is located in the tubular beam, and is coaxially fixed on the driving end of the driving motor, and the suspension cable is wound at least once in the groove of the driving sheave. The driving motor drives the driving sheave to rotate forward or reverse to drive the tubular beam to move on the suspension cable.

[0020] The beneficial effects of the above technical solution are: it has a simple structure, can flexibly drive the moving head to move on the suspension cable, and is not prone to slipping.

[0021] The moving head in the above technical solution also includes a limiting wheel group arranged at both ends of the tube beam, and the limiting wheel group is used to limit the suspension cable to pass through the middle of the two ends of the tube beam.

[0022] The beneficial effect of the above technical solution is that the friction resistance between the suspension cable and the tube beam can be reduced, thereby improving the durability of the suspension cable.

[0023] The above technical solution also includes a hanger, and the lifting ends of the two slings are respectively connected to the two ends of the hanger so as to be detachably connected to the pipeline through the hanger.

[0024] The beneficial effect of the above technical solution is that the lifting ends of the two lifting cables are detachably connected to the pipeline through the hanger, so that the balance of the pipeline is good when it is lifted.

[0025] The hanger described in the above technical solution includes a hanger and a plurality of hoops. The hanger is in the shape of a straight bar. Both ends of the upper end of the hanger are respectively provided with lifting ears. The lifting ends of the two slings are respectively connected to the two lifting ears. The plurality of hoops are arranged at intervals along the length direction of the hanger at the lower end of the hanger. The plurality of hoops are used to be connected with the pipe clamp.

[0026] The beneficial effect of the above technical solution is that: in this way, the pipe can be clamped under the hanger by multiple clamps, and the whole can be lifted or lowered stably by two cranes. It is easy to use and it is convenient to clamp or release the pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the operation of a cable crane in leap-forward laying of a long-distance pipeline in an embodiment of the present invention;

[0028] Figure 2It is a schematic diagram of the structure when the moving head and the lifting member lift the pipeline in the embodiment of the present invention;

[0029] Figure 3 It is a schematic diagram of the connection between the suspension cable and the moving head in an embodiment of the present invention;

[0030] Figure 4 It is a schematic diagram of the coordination between the suspension cable and the limiting wheel assembly in an embodiment of the present invention.

[0031] In the figure: 1 cable crane; 11 suspension cable; 12 moving head; 121 pipe beam; 122 driving member; 1221 driving motor; 1222 driving groove wheel; 123 limiting wheel group; 1231 limiting groove wheel; 13 supporting frame; 14 lifting member; 141 lifting cable; 15 hanging device; 151 hanging seat; 152 clamping hoop; 153 lifting ear; 2 supporting pier; 3 pipeline; 4 internal welding machine. DETAILED DESCRIPTION

[0032] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention. The present invention is described in more detail by way of example with reference to the accompanying drawings in the following paragraphs. The advantages and features of the present invention will become clearer according to the following description and claims. It should be noted that the drawings are all in a very simplified form and are not in precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0033] Example 1

[0034] like Figure 1 As shown, this embodiment provides a method for leapfrogging long-distance pipelines in complex terrain, comprising the following steps: Step 1: erecting a cable crane 1 at a complex terrain according to a preset pipeline laying route, and sequentially setting spaced support piers 2 along the pipeline laying route at the complex terrain; Step 2: the cable crane 1 hoists the pipelines 3 one by one to the support piers 2, and performs welding between two adjacent pipelines 3 until the leapfrogging of the pipelines 3 at the complex terrain is completed. In this way, the cable crane can be pre-installed along the preset pipeline laying route across the complex terrain area ( Figure 1 The position marked with A in the middle is a complex terrain area), and then support piers are set up in the complex terrain area according to the preset pipe-laying route, and the pipes are transported to the complex terrain area one by one by a cable crane, and erected on the support piers in sequence, and the butt ends of two adjacent pipes are welded.

[0035] The complex terrain described in the above technical solution is a mountainous area, a water network area, a swamp area or an obstacle crossing area (such as an area where there are irremovable obstacles on the ground where the pipe is laid). The terrain is complex and difficult for operating equipment to reach. The laying method can be used to lay pipelines efficiently and at low cost.

[0036] In the step 2 of the above technical solution, an internal welding machine 4 is arranged in the pipeline 3 to perform root welding, which has good welding effect and can realize automatic welding.

[0037] The cable crane 1 described in the above technical solution has two independently liftable lifting points, and the two lifting points are respectively installed at the two ends of the pipeline 3, so that after the pipeline is lifted, the height of both ends can be independently adjusted to be placed on the supporting pier.

[0038] Example 2

[0039] like Figure 1 As shown, this embodiment provides a cable crane, including a suspension cable 11, a moving head 12, two support frames 13 and two lifting members 14. The two ends of the suspension cable 11 are each provided with a support frame 13 placed upright on the ground, so that the suspension cable 11 can be suspended above a complex terrain according to a pipeline laying route. The moving head 12 is self-powered and hung on the suspension cable 11, and can move relative to the suspension cable 11 on the suspension cable 11. The two lifting members 14 are installed on the moving head 12 at intervals, and the lifting member 14 has a suspension cable 14. 1, and the lifting end of the sling 141 is used for detachably connecting with the corresponding end of the pipeline 3, the sling is erected along the pipe laying line by adopting two supporting frames, and the moving head is arranged on the sling and can be flexibly moved on the sling, and the two slings corresponding to the two lifting parts arranged on the moving head can be connected with the two ends of the pipeline to lift the pipeline into the air, and under the action of the moving head, it is transported to the position of the corresponding pipe laying line in the complex terrain area, and at the same time, the pipeline is dropped on the supporting pier (in this embodiment, the two lifting parts respectively constitute the two lifting points of the cable crane).

[0040] The support frame described in this embodiment can be a concrete column or a steel frame column, and of course a crane (such as the spider crane currently available on the market) can also be used.

[0041] like Figure 2 As shown, the moving head 12 in the above technical solution includes a tube beam 121 and a driving member 122, the cable 11 passes through the inner hole of the tube beam 121, the driving member 122 is installed in the middle of the tube beam 121, and is connected to the cable 11 by transmission, the two lifting members 14 are respectively installed at both ends of the tube beam 121, and the moving head 12 is used to drive the tube beam 121 to move on the cable 11 along the length direction of the cable 11, so that the tube beam will not rotate on the cable and the tube beam will not fall on the suspension beam, and its operation safety is good.

[0042] like Figure 3As shown, the driving member 122 in the above technical solution includes a driving motor 1221 and a driving sheave 1222, wherein the driving motor 1221 is installed in the middle portion corresponding to the length direction of the tube beam 121, and its driving end extends into the interior of the tube beam 121, and the driving sheave 1222 is located in the tube beam 121, and is coaxially fixedly installed on the driving end of the driving motor 1221, and the suspension cable 11 is wound at least once in the groove of the driving sheave 1222, and the driving motor 1221 drives the driving sheave 1222 to rotate forward or reverse to drive the tube beam 121 to move on the suspension cable 11, and the structure is simple, and the moving head can be flexibly driven to move on the suspension cable, and it is not easy to slip. The driving motor can adopt a brake motor, so that the moving head can be parked on the suspension cable.

[0043] like Figure 3 and Figure 4 As shown, the moving head 12 in the above technical solution also includes a limiting wheel group 123 arranged at both ends of the tube beam 121. The limiting wheel group 123 is used to limit the suspension cable 11 to pass through the middle of both ends of the tube beam 121, thereby reducing the friction resistance between the suspension cable and the tube beam, thereby improving the durability of the suspension cable.

[0044] In this embodiment, limiting wheel groups 123 are respectively arranged at both ends inside the tube beam, and the limiting wheel groups 123 include two limiting groove wheels 1231. The two limiting groove wheels 1231 in the same group are arranged opposite to each other (their wheel axles are parallel to each other), and their edges fit together. The channel formed by the fitting part is used for the suspension cable to pass through, and the channels of multiple groups of limiting wheel groups 123 are aligned with each other. The cross-section of the tube beam in this embodiment can be a square ring.

[0045] The above technical solution also includes a hanger 15, and the lifting ends of the two slings 141 are respectively connected to the two ends of the hanger 15, so as to be detachably connected to the pipeline 3 through the hanger 15. In this way, the lifting ends of the two slings are detachably connected to the pipeline through the hanger, thereby improving the balance of the pipeline when it is lifted.

[0046] The hanger 15 described in the above technical solution includes a hanger 151 and a plurality of clamps 152. The hanger 151 is in a straight bar shape. Both ends of the upper end of the hanger 151 are respectively provided with lifting ears 153. The lifting ends of the two slings 141 are respectively connected to the two lifting ears 153. The plurality of clamps 152 are arranged at intervals along the length direction of the hanger 151 at the lower end of the hanger 151. The plurality of clamps 152 are used to be clamped with the pipe 3. In this way, the pipe can be clamped under the hanger by a plurality of clamps, and at the same time, it can be lifted or lowered stably as a whole by two cranes. It is easy to use, and it is convenient to clamp or release the pipe.

[0047] The lifting member in this embodiment can be an electric winch, and the two lifting members are respectively installed at the lower ends of both ends of the pipe beam.

[0048] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any ordinary technician in the industry can smoothly implement the present invention as shown in the drawings and described above. However, any equivalent changes, modifications and evolutions made by technicians familiar with the profession without departing from the scope of the technical solution of the present invention using the technical content disclosed above are all equivalent embodiments of the present invention. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the technical solution of the present invention.

Claims

1. A method for laying long-distance pipelines across complex terrain, characterized in that: The steps include: Step 1: erecting a cable crane (1) at a complex terrain according to a pre-set pipe-laying route, and sequentially setting support piers (2) at intervals along the pipe-laying route at the complex terrain; Step 2: The cable crane (1) hoists the pipelines (3) one by one to be installed on the support pier (2), and performs welding between two adjacent pipelines (3) until the pipelines (3) are installed in a leapfrog manner at the complex terrain.

2. The method for laying long-distance pipelines in complex terrain by leaps and bounds according to claim 1 is characterized in that: The complex terrain is a mountainous area, a water network area, a swamp area or an obstacle crossing area.

3. The method for laying long-distance pipelines in complex terrain by leaps and bounds according to claim 1 is characterized in that: In step 2, an internal welding machine (4) is arranged inside the pipeline (3) to perform root welding.

4. The method for laying long-distance pipelines in complex terrain by leaps and bounds according to claim 1 is characterized in that: The cable crane (1) has two independently liftable suspension points, and the two suspension points are respectively installed at two ends of the pipeline (3).

5. A cable crane used in the method for laying long-distance pipelines across complex terrain as claimed in any one of claims 1 to 4, characterized in that: The invention comprises a suspension cable (11), a moving head (12), two support frames (13) and two lifting members (14). A support frame (13) is arranged on the ground at each end of the suspension cable (11) so as to suspend the suspension cable (11) above a complex terrain according to a pipe laying route. The moving head (12) is self-powered and hung on the suspension cable (11). It can move relative to the suspension cable (11) on the suspension cable (11). Two lifting members (14) are installed on the moving head (12) at intervals. The lifting member (14) has a suspension cable (141), and the lifting end of the suspension cable (141) is used for detachably connecting with the corresponding end of the pipeline (3).

6. The cable hoist according to claim 5, characterized in that The moving head (12) comprises a tube beam (121) and a driving member (122); the suspension cable (11) passes through an inner hole of the tube beam (121); the driving member (122) is installed in the middle of the tube beam (121) and is transmission-connected to the suspension cable (11); the two lifting members (14) are respectively installed at two ends of the tube beam (121); and the moving head (12) is used to drive the tube beam (121) to move on the suspension cable (11) along the length direction of the suspension cable (11).

7. The cable hoist according to claim 6, characterized in that The driving member (122) comprises a driving motor (1221) and a driving sheave (1222); the driving motor (1221) is mounted at the middle portion corresponding to the length direction of the tube beam (121), and its driving end extends into the interior of the tube beam (121); the driving sheave (1222) is located in the tube beam (121), and is coaxially fixedly mounted on the driving end of the driving motor (1221); the suspension cable (11) is wound at least once in the groove of the driving sheave (1222); the driving motor (1221) drives the driving sheave (1222) to rotate forward or reversely to drive the tube beam (121) to move on the suspension cable (11).

8. The cable hoist according to claim 7, characterized in that The moving head (12) further comprises a limiting wheel set (123) arranged at two ends inside the tube beam (121), and the limiting wheel set (123) is used to limit the suspension cable (11) to pass through the middle of the two ends of the tube beam (121) and exit.

9. The cable hoist according to claim 5, characterized in that It also comprises a hanger (15), and the lifting ends of the two slings (141) are respectively connected to the two ends of the hanger (15), so as to be detachably connected to the pipeline (3) through the hanger (15).

10. The cable hoist according to claim 9, characterized in that The hanger (15) comprises a hanger (151) and a plurality of hoops (152); the hanger (151) is in the shape of a straight bar; two ends of the upper end of the hanger (151) are respectively provided with lifting ears (153); the lifting ends of the two slings (141) are respectively connected to the two lifting ears (153); the plurality of hoops (152) are arranged at intervals along the length direction of the hanger (151) at the lower end of the hanger (151); the plurality of hoops (152) are used to be clamped with the pipe (3).

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