Lifting tool for heavy oil pipe

Abstract

The utility model discloses a hoisting tool for a heavy oil pipe, which comprises a vertical fixed rod, three support arms are uniformly distributed at the bottom of the fixed rod along the circumference, a grabber is hinged on each support arm, the grabber is approximately L-shaped, a coaxial conical table A is arranged at the upper part of the fixed rod, and a conical table B is arranged at the lower part of the fixed rod. The upper portion of the conical table A is small, the lower portion of the conical table A is large, and the conical table A is fixedly connected with the fixing rod; the top end of the fixing rod is sleeved with a sleeve which is in sliding connection with the fixing rod, chains or steel wire ropes are installed between the outer wall of the sleeve and the grabbers, at least two barbs are installed at the lower end of the outer wall of the sleeve, the upper ends of the barbs are rotationally connected with the sleeve, and the lower ends of the barbs are bent towards the axis of the fixing rod. The gravity center of the barb is located at the lower end so that the lower end of the barb naturally approaches the axis of the fixing rod. The heavy oil pipe hoisting tool can hoist a heavy oil pipe, is convenient to disassemble, and can adapt to oil pipes with different diameters.

Description

Technical Field

[0001] The utility model relates to the technical field of tooling fixtures, in particular to a lifting tooling for heavy oil pipes. Background Art

[0002] Oilfield exploitation operations are carried out through pumping pipes, which are generally made by splicing multiple sections of oil pipes. The pumping pipes of some large oil fields have larger diameters and thicker walls, so they are heavier, making them difficult to transport or carry during processing within the factory. In addition, processing plants often have to process oil pipes of different diameters, and the use of a single tooling fixture cannot meet the lifting requirements of workpieces of different sizes. Utility Model Content

[0003] In view of the above problems existing in the prior art, the utility model provides a lifting tool for heavy oil pipes.

[0004] The specific scheme of the utility model is as follows: a lifting tool for heavy oil pipes, including a vertical fixed rod, the bottom of the fixed rod is evenly distributed with three support arms along the circumference, each support arm is hinged with a claw hook, the claw hook is generally L-shaped, the upper part of the fixed rod is provided with a coaxial conical platform A, the conical platform A is small on the top and large on the bottom and is fixedly connected to the fixed rod, an inverted conical platform B is provided below the conical platform A, and the conical platform B is coaxial with the fixed rod and slidably connected; a sleeve is arranged on the top of the fixed rod, the sleeve is slidably connected to the fixed rod, a chain or wire rope is installed between the outer wall of the sleeve and each claw hook, at least two barbs are installed at the lower end of the outer wall of the sleeve, the upper end of the barb is rotatably connected to the sleeve, the lower end of the barb is bent toward the axis of the fixed rod, the center of gravity of the barb is located at the lower end so that the lower end of the barb is naturally close to the axis of the fixed rod.

[0005] Preferably, the support arm extends outwardly in a horizontal direction.

[0006] Preferably, the support arm is provided with a plurality of pin holes along the length direction, and a certain spacing is provided between the pin holes. A pin shaft is installed in the middle of the claw hook, and the pin shaft matches the pin hole.

[0007] Preferably, the support arm is composed of two clamping plates, one end of the two clamping plates is connected to the fixing rod, a mounting groove is provided between the two clamping plates, and the claw hook is installed in the mounting groove.

[0008] Preferably, a counterweight is provided at the lower end of the claw hook.

[0009] Compared with the prior art, the beneficial effects of the utility model are as follows: heavy oil pipes can be lifted by the lifting tool, and the tooling can be conveniently disassembled; by providing a plurality of pin holes along the length direction of the support arm, the claw hooks are installed in the pin holes, so that the position of the claw hooks can be adjusted to adapt to oil pipes of different diameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a three-dimensional schematic diagram of the utility model;

[0011] Figure 2 It is the front view of the utility model;

[0012] Figure 3 yes Figure 2 A top view of

[0013] Figure 4 yes Figure 3 AA view;

[0014] In the figure: 1, sleeve; 2, chain; 3, barb; 4, claw hook; 5, conical table A; 6, conical table B; 7, support arm; 71, pin hole; 8, workpiece; 9, fixing rod. DETAILED DESCRIPTION

[0015] like Figure 1-4 As shown, this embodiment provides a lifting tool for heavy oil pipes, including a vertical fixing rod 9, three supporting arms 7 are evenly distributed along the circumference of the bottom of the fixing rod 9, each supporting arm 7 is hinged with a claw hook 4, the claw hook 4 is generally L-shaped, a coaxial conical platform A5 is provided on the upper part of the fixing rod 9, the conical platform A5 is small on the upper part and large on the lower part and is fixedly connected to the fixing rod 9, an inverted conical platform B6 is provided below the conical platform A5, and the top surface diameter of the conical platform B6 is not less than the bottom surface diameter of the conical platform A5. The diameter of the surface is that the conical platform B6 is coaxial with the fixed rod 9 and is slidably connected; a sleeve 1 is arranged on the top outer sleeve of the fixed rod 9, and the sleeve 1 is slidably connected to the fixed rod 9. A chain 2 or a wire rope is installed between the outer wall of the sleeve 1 and each claw hook 4. At least two barbs 3 are installed at the lower end of the outer wall of the sleeve 1. The upper ends of the barbs 3 are rotatably connected to the sleeve 1, and the lower ends of the barbs 3 are bent toward the axis of the fixed rod 9. The center of gravity of the barbs 3 is located at the lower end, so that the lower ends of the barbs 3 are naturally close to the axis of the fixed rod 9; a lifting ring is provided at the top of the sleeve 1.

[0016] Preferably, the support arm 7 extends outward in a horizontal direction.

[0017] Preferably, the support arm 7 is provided with a plurality of pin holes 71 along the length direction, and a certain distance is provided between the pin holes 71 . A pin shaft is installed in the middle of the claw hook 4 , and the pin shaft matches the pin hole 71 .

[0018] Preferably, the support arm 7 is composed of two clamping plates, one end of the two clamping plates is connected to the fixing rod 9, a mounting groove is provided between the two clamping plates, and the claw hook 4 is installed in the mounting groove.

[0019] Preferably, a counterweight is provided at the lower end of the claw hook 4. The working principle of the utility model is as follows: when the workpiece 8 is to be hoisted, the workpiece 8 is first placed vertically so that the axis of the oil pipe is in a vertical state, the lifting ring at the top of the utility model is connected to the crane, and the position of each claw hook 4 is adjusted according to the diameter of the workpiece 8. During the adjustment, the pins of all the claw hooks 4 are located on the same circumference, and the pins of the claw hooks 4 are installed in the appropriate pin holes 71; then the crane descends from directly above the workpiece 8 to the workpiece 8 with the entire tooling, so that the support arm 7 naturally falls on the top surface of the workpiece 8, and then the crane continues to descend so that the sleeve 1 continues to descend along the slide bar, and each claw hook 4 rotates with the pin as the axis due to its own gravity, so that the claw hook 4 is retracted to the center, and at the same time, the barb 3 descends to the bottom of the conical platform B6 At this time, the crane is pulled upward again, driving the sleeve 1 to move upward, and the hook 3 automatically slides the cone platform B6 upward. When the top of the cone platform B6 contacts the cone platform A5, the cone platform B6 stops moving, and the hook 3 slides along the outer wall of the cone platform B6 to the outer wall of the cone platform A5 and then continues to slide upward to leave the cone platform A5. The sleeve 1 continues to move upward and pulls each claw hook 4 through the chain 2 to make the claw hook 4 rotate in the opposite direction. The lower end of the claw hook 4 opens outward and thus fits tightly against the inner wall of the workpiece 8. When the upward traction force overcomes the gravity of the workpiece 8 and lifts it, the outward tension of the three claw hooks 4 firmly grasps the workpiece 8, and the huge static friction between the claw hook 4 and the workpiece 8 ensures that the workpiece 8 will not slip, thereby achieving the lifting and transfer of the workpiece 8.

[0020] When the workpiece 8 is transported to the right place and the lifting tooling needs to be disassembled, the workpiece 8 is first dropped to the ground. Since the conical platform B6 is not pulled, it naturally falls down. At this time, there is a certain distance between the conical platform B6 and the conical platform A5. Then continue to lower the sleeve 1, so that the sleeve 1 moves down along the fixed rod 9, and at the same time, the chain 2 is relaxed, so that each claw hook 4 releases the workpiece 8. When the barb 3 drops below the conical platform A5, the hook head at the bottom of the barb 3 naturally gathers toward the center to hook the bottom of the conical platform A5. At this time, the crane controls the sleeve 1 to stop lowering and pulls the sleeve 1 upward. Since the barb 3 hooks the conical platform A5, the sleeve 1 lifts the conical platform A5 fixed rod 9 and each support arm 7 upward as a whole through the barb 3 to achieve separation from the workpiece 8.

Claims

1. A lifting tool for heavy oil pipes, characterized by: The utility model comprises a vertical fixed rod, the bottom of which is evenly distributed with three supporting arms along the circumference, each supporting arm being hinged with a claw hook, which is generally L-shaped, the upper part of the fixed rod is provided with a coaxial conical platform A, the conical platform A is small at the upper part and large at the lower part and is fixedly connected to the fixed rod, an inverted conical platform B is provided below the conical platform A, the conical platform B is coaxial with the fixed rod and is slidably connected; a sleeve is arranged on the outer top of the fixed rod, the sleeve is slidably connected to the fixed rod, a chain or a steel wire rope is arranged between the outer wall of the sleeve and each claw hook, at least two barbs are arranged at the lower end of the outer wall of the sleeve, the upper end of the barb is rotatably connected to the sleeve, the lower end of the barb is bent toward the axis of the fixed rod, the center of gravity of the barb is located at the lower end so that the lower end of the barb is naturally close to the axis of the fixed rod.

2. A lifting tool for heavy oil pipes according to claim 1, characterized in that: The support arm extends outwardly in a horizontal direction.

3. A lifting tool for heavy oil pipes according to claim 2, characterized in that: The support arm is provided with a plurality of pin holes along the length direction, and a certain distance is provided between the pin holes. A pin shaft is arranged in the middle of the claw hook, and the pin shaft matches the pin hole.

4. A lifting tool for heavy oil pipes as claimed in claim 3, characterized in that: The support arm is composed of two clamping plates, one end of the two clamping plates is connected to the fixing rod, a mounting groove is arranged between the two clamping plates, and the claw hook is installed in the mounting groove.

5. The lifting tool for heavy oil pipe according to claim 1, characterized in that: A counterweight is provided at the lower end of the claw hook.

Images