Pipe extraction system for anchor drilling rig

Abstract

A pipe pulling system for an anchor drilling rig includes an initial pipe pulling mechanism and a subsequent pipe pulling mechanism. The initial pipe pulling mechanism includes a mast body and a power head. An orifice frame is provided at the lower end of the mast body. The power head is slidably mounted on the mast body. A pulling cylinder with an axis parallel to the main axis of the power head is provided on the power head. A column matched with the piston rod of the pulling cylinder is provided on the orifice frame. The reaction force of the piston rod of the pulling cylinder given by the column is used as the power for initial pipe pulling. The subsequent pipe pulling mechanism includes a mobile cylinder provided in the mast body. The upper and lower ends of the power head housing are respectively connected to an upward chain and a downward chain. The mobile cylinder is connected to a vertical transmission rod. The upper and lower ends of the transmission rod are respectively provided with sprockets matched with the upward chain and the downward chain. The mobile cylinder provides the power for subsequent pipe pulling. The anchor drilling rig is equipped with a pipe pulling device, which makes construction safe and convenient, reduces the workload of the construction site, reduces the construction intensity and also reduces the construction cost.

Description

Technical Field

[0001] The invention relates to the field of anchor drilling rigs, in particular to a pipe pulling system of an anchor drilling rig. Background Art

[0002] When the existing anchor drilling rig is used for anchor pile construction, if the following pipe drilling is adopted, the casing must be pulled out in a short time after the drilling, the placement of the anchor rod body (anchor reinforcement) and the grouting are completed, so as to avoid the casing being unable to be pulled out after the cement slurry reaches the initial setting, resulting in material loss and not meeting the requirements of the construction specifications. At present, after completing the above process, the anchor drilling rig must immediately move the drilling rig to vacate the construction area for the automobile crane or crawler crane that comes to assist in pulling the pipe, and the site must be leveled and the road must be filled to create the necessary construction conditions for pulling the pipe. In the Chinese utility model patent specification CN205805447U, a multifunctional detachable hydraulic pipe pulling machine is disclosed, including a hydraulic pipe pulling machine, a lifting cylinder oil pipe and a hydraulic power device, one end of the lifting cylinder oil pipe is connected to the power output port of the hydraulic power device, and the other end is connected to the power input port of the hydraulic pipe pulling machine, and the multifunctional detachable hydraulic pipe pulling machine also includes a lifting cylinder oil pipe and a hydraulic lifting bracket arranged below the hydraulic pipe pulling machine. This multifunctional detachable hydraulic pipe pulling machine, by setting a hydraulic lifting bracket under the hydraulic pipe pulling machine, uses a lifting cylinder to provide lifting power, so that the hydraulic pipe pulling machine can be lifted to the height of the working surface, realizing the improvement of the mechanical automation of the hydraulic pipe pulling machine, avoiding manual handling of heavy equipment, reducing the labor intensity of workers, reducing the danger of operation, and solving the problem of difficult pipe pulling operations when the drilling height is high in actual projects. However, this construction method or operation method has many disadvantages such as prolonged construction time, the need to level the site or fill the road, and the simultaneous operation of multiple construction machines increases the complexity and danger of the construction site and the difficulty coefficient of pipe pulling. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a pipe pulling system for an anchor drilling rig which can make the construction rhythm safe and convenient and reduce the construction intensity.

[0004] The technical problem to be solved by the present invention is achieved through the following technical scheme: a pipe pulling system for an anchor drilling rig, which is characterized in that it includes an initial pipe pulling mechanism and a subsequent pipe pulling mechanism, wherein the initial pipe pulling mechanism includes a mast body, an orifice frame and a power head, wherein the orifice frame is fixedly mounted on the lower end of the mast body, the power head is slidably mounted on the mast body, a pulling cylinder is provided on the power head, the axis of the pulling cylinder is arranged parallel to the main axis of the power head, and a column is provided on the orifice frame to cooperate with the piston rod of the pulling cylinder;

[0005] The subsequent pipe pulling mechanism is a multiplying mechanism connected by a mobile cylinder, an upward chain and a downward chain. The mobile cylinder is arranged in the mast body, the upward chain is connected to the upper end of the power head box, the downward chain is connected to the lower end of the power head box, and the mobile cylinder is connected to a vertical transmission rod. The upper end of the transmission rod is provided with a sprocket that cooperates with the upward chain, and the lower end of the transmission rod is provided with a sprocket that cooperates with the downward chain.

[0006] The technical problem to be solved by the present invention can be further achieved by the following technical solution: the two columns on the orifice frame are cylinders, and the cross-sectional diameter of the columns is larger than the cross-sectional diameter of the piston rod of the lifting cylinder.

[0007] The technical problem to be solved by the present invention can be further achieved by the following technical solution: there are two oil pulling cylinders, and the number of columns arranged on the orifice frame is equal to that of the oil pulling cylinders, and the positions correspond to each other.

[0008] The technical problem to be solved by the present invention can be further achieved by the following technical solution: the opening center line of the orifice frame is arranged concentrically with the main shaft of the power head.

[0009] The technical problem to be solved by the present invention can be further achieved through the following technical scheme, wherein one end of the upward chain is connected to the middle position of the upper end of the power head box, the other end of the upward chain is connected to the crossbeam of the mast body, one end of the downward chain is connected to the middle position of the lower end of the power head box, and the other end of the downward chain is connected to the crossbeam of the mast body.

[0010] The technical problem to be solved by the present invention can be further achieved by the following technical solution: the movable cylinder is arranged with one end of the movable cylinder piston rod facing upward.

[0011] The beneficial effect of the present invention is that a pipe pulling system is added to the original anchor drilling rig, which has an initial pipe pulling mechanism and a subsequent pipe pulling mechanism, so that drilling, anchor reinforcement placement, grouting and pipe pulling are all completed by the anchor drilling rig itself, reducing the frequency of using multiple construction machinery at the same site, reducing the time wasted in intermediate links such as moving the drilling rig, leveling the site, and paving the road, and the casing can be easily pulled out before the cement slurry begins to set, making the pulling out of the casing safer and more convenient, reducing the workload on the construction site, reducing the construction intensity, and reducing the construction cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the present invention;

[0013] Figure 2 It is a schematic diagram of the subsequent extubation mechanism of the present invention. DETAILED DESCRIPTION

[0014] The specific technical solutions of the present invention are further described below to help those skilled in the art further understand the present invention without limiting the rights thereof.

[0015] Figure 1 Middle: 1. Mast body, 2. Orifice frame, 3. Column, 4. Downward chain, 5. Piston rod of lifting cylinder, 6. Upward chain, 7. Cylinder barrel of lifting cylinder, 8. Power head box, 9. Power head main shaft, 10. Casing, 11. Moving cylinder, 12. Transmission rod, 13 sprocket.

[0016] A pipe pulling system for an anchor drilling rig, comprising an initial pipe pulling mechanism and a subsequent pipe pulling mechanism, wherein the initial pipe pulling mechanism comprises a mast body 1, an orifice frame 2 and a power head, wherein the orifice frame 2 is fixedly mounted at the lower end of the mast body 1, the power head is slidably mounted on the mast body 1, a pulling cylinder is arranged on the power head, the axis of the pulling cylinder is arranged parallel to a main shaft 9 of the power head, and a column 3 is arranged on the orifice frame 2 to cooperate with a piston rod 5 of the pulling cylinder;

[0017] The subsequent pipe pulling mechanism is a multiplying mechanism composed of a mobile cylinder 11, an upward chain 6 and a downward chain 4. The mobile cylinder 11 is arranged in the mast body 1, the upward chain 6 is connected to the upper end of the power head box 8, and the downward chain 4 is connected to the lower end of the power head box 8. The mobile cylinder 11 is connected to a vertical transmission rod 12, and a sprocket 13 cooperating with the upward chain 6 is provided at the upper end of the transmission rod 12, and a sprocket 13 cooperating with the downward chain 4 is provided at the lower end of the transmission rod 12.

[0018] The power head main shaft 9 is connected to the casing 10 and the drill bit. After the drilling is completed, the drilling rig moves to make way for the hole and places the anchor rod body. At this time, the power head main shaft 9 can assist in placing the anchor rod body when moving on the mast body; after the grouting is completed, the drilling rig moves again and aligns the hole position, and the power head main shaft 9 is reconnected to the casing 10, ready to pull out the casing 10. During the initial pipe pulling, the reaction force of the pulling cylinder piston rod 5 acting on the two columns 3 of the orifice frame 2 gives the pulling cylinder barrel 7 an upward force. The pulling cylinder barrel 7 drives the power head housing 8 to rise, and the power head housing 8 drives the power head spindle 9 connected to the casing 10 to rise, so that the casing 10 obtains an initial acceleration from a static state to a moving state, and the casing 10 begins to loosen. In the initial pipe pulling stage, the thrust support point of the pulling cylinder piston rod 5 is the two columns 3 of the orifice frame 2, and the force runs from the pulling cylinder piston rod 5 → pulling cylinder barrel 7 → power head housing 8 → power head spindle 9 → casing 10. During the subsequent pipe pulling, the thrust of the mobile oil cylinder 11 causes the transmission rod 12 to rise, and the transmission rod 11 drives the power head box 8 to rise through the upward chain 6 connected to the sprocket 13, and the power head box 8 drives the power head spindle 9 connected to the casing 10 to rise at the same time, completing the subsequent stroke of pulling the casing 10 out of the construction hole. In the subsequent pipe pulling stage, the thrust support point of the mobile oil cylinder 11 is the four legs of the anchor drilling rig. The operation of force is from the upward chain 6 → power head box 8 → power head spindle 9 → casing 10.

[0019] [Example 1]

[0020] The two columns 3 on the orifice frame 2 are cylinders, and the cross-sectional diameter of the columns is larger than the cross-sectional diameter of the lifting cylinder piston rod 5, which increases the force-bearing area between the lifting cylinder piston rod 5 and the columns 3, ensuring that the reaction force of the columns 3 on the lifting cylinder piston rod 5 can be transmitted smoothly.

[0021] [Example 2]

[0022] There are two pulling and pulling cylinders, and the number of the columns 3 on the orifice frame 2 is equal to that of the pulling and pulling cylinders, and their positions correspond to each other. In this way, the driving force of a single pulling and pulling cylinder to lift the power head box 8, the power head spindle 9, the casing 10 and the drill bit can be reduced, the volume and weight of a single cylinder can be reduced, and the overall operation stability and utilization rate of the anchor drilling rig can be enhanced.

[0023] [Example 3]

[0024] The opening center line of the orifice frame 2 is concentrically arranged with the power head main shaft 9, so that the center line of the sleeve 10 connected to the power head main shaft 9 falls on the center line of the opening of the orifice frame 2, ensuring the balance of the sleeve 10 during the lifting process, making the pipe pulling stable and efficient.

[0025] [Example 4]

[0026] One end of the upward chain 6 is connected to the middle position of the upper end of the power head box 8, and the other end of the upward chain 6 is connected to the crossbeam of the mast body 1. One end of the downward chain 4 is connected to the middle position of the lower end of the power head box 8, and the other end of the downward chain 4 is connected to the crossbeam of the mast body 1, so that the lifting force of the upward chain 6 can be evenly distributed to the power head box 8, thereby ensuring the stability of the subsequent pipe pulling process.

[0027] [Example 5]

[0028] The mobile cylinder 11 is set with one end of the mobile cylinder piston rod facing upward. The mobile cylinder piston rod extends upward to provide thrust as the power for subsequent pipe pulling, which acts on the transmission rod 12. The sprocket 13 on the transmission rod 12 drives the upward chain 6 to lift the power head box 8, the power head main shaft 9, and the sleeve 10 to rise at the same time.

Claims

1. A pipe pulling system for an anchor drilling rig, characterized in that: It includes an initial tube pulling mechanism and a subsequent tube pulling mechanism. The initial tube pulling mechanism includes a mast body, an orifice frame and a power head. The orifice frame is fixedly installed at the lower end of the mast body. The power head is slidably installed on the mast body. A pulling cylinder is provided on the power head. The axis of the pulling cylinder is arranged parallel to the main axis of the power head. A column is provided on the orifice frame to cooperate with the piston rod of the pulling cylinder. The subsequent pipe pulling mechanism is a multiplication mechanism connected by a mobile oil cylinder, an upward chain and a downward chain. The mobile oil cylinder is arranged in the mast body, the upward chain is connected to the upper end of the power head box body, the downward chain is connected to the lower end of the power head box body, and the mobile oil cylinder is connected to a vertical transmission rod. The upper end of the transmission rod is provided with a sprocket that cooperates with the upward chain, and the lower end of the transmission rod is provided with a sprocket that cooperates with the downward chain; the mobile oil cylinder is arranged with one end of the mobile oil cylinder piston rod facing upward; One end of the upward chain is connected to the middle position of the upper end of the power head box, and the other end of the upward chain is connected to the crossbeam of the mast body. One end of the downward chain is connected to the middle position of the lower end of the power head box, and the other end of the downward chain is connected to the crossbeam of the mast body. When the pipe is initially pulled out, the reaction force of the pulling cylinder on the column of the orifice frame drives the power head box to rise, and the power head box drives the power head spindle connected to the casing to rise, so that the casing obtains an initial acceleration from a static state to a moving state, and the casing begins to loosen; During subsequent pipe pulling, the thrust of the mobile cylinder causes the transmission rod to rise, and the transmission rod drives the power head housing to rise through the upward chain connected to the sprocket, and the power head housing drives the power head spindle connected to the casing to rise at the same time, completing the subsequent stroke of pulling the casing out of the construction hole.

2. The pipe pulling system of an anchor drilling rig according to claim 1, characterized in that: The column on the orifice frame is cylindrical, and the cross-sectional diameter of the column is larger than the cross-sectional diameter of the piston rod of the lifting and pulling oil cylinder.

3. The pipe pulling system of an anchor drilling rig according to claim 1, characterized in that: There are two oil pulling and pulling cylinders, and the number of the columns on the orifice frame is equal to the number of the oil pulling and pulling cylinders, and their positions correspond to each other.

4. The pipe pulling system of an anchor drilling rig according to claim 1, characterized in that: The opening center line of the orifice frame is arranged concentrically with the main shaft of the power head.

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