Pipe grabbing device

Abstract

The utility model relates to the technical field of pipe grabbing, in particular to a pipe grabbing device. The pipe grabbing device comprises a U-shaped shell, a semicircular outer tooth arm A and a semicircular outer tooth arm B which are rotationally connected are installed in the U-shaped shell, and a driving component used for driving the semicircular outer tooth arm A and the semicircular outer tooth arm B to rotate in the opposite directions or in the opposite directions is installed on the U-shaped shell. According to the pipe grabbing device provided by the utility model, the semicircular outer tooth arm A and the semicircular outer tooth arm B which are coaxially arranged are driven by the driving component to accurately rotate in the opposite direction or the opposite direction, and finally, the two semicircular arms are folded to form an approximately complete circular coating structure, so that surface contact, not point contact or line contact, of a pipe fitting is realized; and the enveloping type clamping greatly increases the contact area, obviously improves the clamping stability and reliability, effectively prevents the pipe fitting from rotating or falling off in the hoisting process, and meanwhile, the opening and closing range of the clamping device is adjustable, so that the clamping device can adapt to pipe fittings with different diameters in a certain range.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe grabbing, in particular to a pipe grabbing device. Background Art

[0002] In the petroleum and chemical industries, pipes of various specifications often need to be hoisted, transported, and stacked. Traditional pipe-grabbing equipment relies primarily on hydraulic clamps and mechanical claws. While hydraulic clamps provide strong gripping force, they suffer from system complexity, high maintenance costs, high energy consumption, and the potential for oil leaks and environmental pollution. Mechanical claws, while relatively simple in structure, often struggle with synchronization and stability when gripping pipes of varying diameters or with poor surface conditions, posing safety risks during pipe lifting.

[0003] Therefore, it is necessary to provide a new pipe grabbing device to solve the above technical problems. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a pipe grabbing device.

[0005] The pipe grabbing device provided by the utility model comprises a U-shaped shell, wherein a semicircular external tooth arm A and a semicircular external tooth arm B are rotatably mounted in the U-shaped shell, and the semicircular external tooth arm A and the semicircular external tooth arm B are coaxially arranged;

[0006] The U-shaped housing is provided with a driving component for driving the semicircular external tooth A arm and the semicircular external tooth B arm to rotate toward or away from each other, and the driving component includes a rotating shaft, a driving gear A is fixedly mounted on the rotating shaft, and the driving gear A is meshed with the semicircular external tooth B arm, and a driving gear B is provided on the rotating shaft for rotation, and the driving gear B is meshed with the semicircular external tooth A arm;

[0007] The driving component is provided with a middle connecting piece, through which the driving gear A and the driving gear B are driven to rotate toward or away from each other.

[0008] Preferably, a protective cover is installed on the U-shaped housing, and a servo motor is fixedly installed in the protective cover through a frame, and the output end of the servo motor is fixedly connected to the connecting end of the rotating shaft through a coupling.

[0009] Preferably, the intermediate coupling includes a rotating sleeve, a driving helical gear and a intermediate coupling helical gear, the rotating sleeve is sleeved on the rotating shaft and is rotatably connected to the rotating shaft, one end of the rotating sleeve is fixedly sleeved with a driving B gear, and the other end of the rotating sleeve is fixedly sleeved with a driven helical gear, the driving helical gear is fixedly sleeved on the rotating shaft, the intermediate coupling helical gear is rotatably installed on the inner top wall of the protective cover, and the intermediate coupling helical gear is located between the driving helical gear and the driven helical gear and is respectively meshed with the driving helical gear and the driven helical gear.

[0010] Preferably, a limit block is fixedly installed on the semicircular external tooth arm A, and the limit block passes through the semicircular sliding groove opened by the semicircular external tooth arm B and is slidably connected to the semicircular sliding groove.

[0011] Preferably, a rotatably connected rotating roller is installed on the inner shell wall of the U-shaped shell, and the rotating roller is rotatably connected to the inner ring wall of the semicircular external tooth A arm and the semicircular external tooth B arm.

[0012] Preferably, auxiliary gears that are symmetrically distributed and rotationally connected are also installed on the inner shell wall of the U-shaped shell, and the auxiliary gears are meshed and connected with the semicircular external tooth A arm or the semicircular external tooth B arm.

[0013] Preferably, a rotatably connected lifting ring is installed on the U-shaped shell.

[0014] Compared with the related art, the pipe grabbing device provided by the present invention has the following beneficial effects:

[0015] The utility model drives the coaxially arranged semicircular external tooth arm A and the semicircular external tooth arm B to perform precise rotational movement toward / against each other through a driving component. Finally, the two semicircular arms are closed to form a nearly complete circular covering structure, achieving surface contact rather than point contact or line contact with the pipe fitting. This enveloping clamping greatly increases the contact area, significantly improves the stability and reliability of the clamping, and effectively prevents the pipe fitting from rotating or falling off during lifting. At the same time, its opening and closing range is adjustable, and can adapt to pipe fittings of different diameters within a certain range. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic structural diagram of a preferred embodiment of the pipe grabbing device provided by the present utility model;

[0017] Figure 2 for Figure 1 The U-shaped housing is shown as a cross-sectional view of the mounting structure of the semicircular external tooth arm A and the semicircular external tooth arm B;

[0018] Figure 3 for Figure 2 The schematic diagram of the structure of the semicircular external tooth A arm and the semicircular external tooth B arm is shown;

[0019] Figure 4 for Figure 2 A schematic structural diagram of the driving component shown;

[0020] Figure 5 for Figure 2 The structure diagram of the U-shaped shell when it is cut away is shown.

[0021] Numbers in the figure: 1. U-shaped shell; 11. Protective cover; 2. Semicircular external tooth arm A; 21. Limit block; 3. Semicircular external tooth arm B; 3a. Semicircular slide; 4. Driving component; 41. Rotating shaft; 42. Driving gear A; 43. Rotating sleeve; 44. Driving gear B; 45. Driving bevel gear; 46. Driven bevel gear; 47. Intermediate bevel gear; 5. Rotating roller; 6. Auxiliary gear; 7. Lifting ring. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0023] The specific implementation of the present invention is described in detail below with reference to specific embodiments.

[0024] See also Figures 1 to 5 An embodiment of the present invention provides a pipe grabbing device, which includes a U-shaped shell 1, a semicircular external tooth A arm 2, a semicircular external tooth B arm 3 and a driving component 4.

[0025] In the embodiments of the present invention, please refer to Figures 1 to 5 , a rotatably connected lifting ring 7 is installed on the U-shaped shell 1, a rotatably connected semicircular external tooth A arm 2 and a semicircular external tooth B arm 3 are installed in the U-shaped shell 1, and the semicircular external tooth A arm 2 and the semicircular external tooth B arm 3 are coaxially arranged, and a driving component 4 for driving the semicircular external tooth A arm 2 and the semicircular external tooth B arm 3 to rotate toward or away from each other is installed on the U-shaped shell 1, and the driving component 4 includes a rotating shaft 41, a protective cover 11 is installed on the U-shaped shell 1, and a protective cover 11 is fixedly installed through the frame Servo motor, the output end of the servo motor is fixedly connected to the connecting end of the rotating shaft 41 through a coupling, a driving gear A 42 is fixedly mounted on the rotating shaft 41, and the driving gear A 42 is meshed with the semicircular external tooth arm B 3, a driving gear B 44 is provided on the rotating shaft 41, and the driving gear B 44 is meshed with the semicircular external tooth arm A 2, and a middle coupling is provided on the driving component 4, which drives the driving gear A 42 and the driving gear B 44 to rotate toward or away from each other;

[0026] The intermediate coupling includes a rotating sleeve 43, a driving bevel gear 45 and a intermediate bevel gear 47. The rotating sleeve 43 is sleeved on the rotating shaft 41 and is rotatably connected to the rotating shaft 41. One end of the rotating sleeve 43 is fixedly sleeved with a driving B gear 44, and the other end of the rotating sleeve 43 is fixedly sleeved with a driven bevel gear 46. The driving bevel gear 45 is fixedly sleeved on the rotating shaft 41. The intermediate bevel gear 47 is rotatably mounted on the inner top wall of the protective cover 11, and the intermediate bevel gear 47 is located between the driving bevel gear 45 and the driven bevel gear 46 and is meshed with the driving bevel gear 45 and the driven bevel gear 46 respectively.

[0027] It should be noted that the present application can use two or more of these groups, which are installed on the lifting beam of the lifting equipment. When performing the pipe grabbing operation, the U-shaped shell 1 is lowered so that the pipe is placed at the bottom of the U-shaped shell 1. The servo motor is then turned on to drive the rotating shaft 41 to rotate, thereby driving the A gear 42 to drive the semicircular external tooth B arm 3 to rotate outward from one side of the U-shaped shell 1. At the same time, since the driving bevel gear 45 is meshed with the driven bevel gear 46 through the intermediate bevel gear 47, the driven bevel gear 46 rotates the driving B gear 44 by rotating the sleeve 43 (in the opposite direction to the rotation of the driving A gear 42).

[0028] Therefore, the semicircular external tooth A arm 2 and the semicircular external tooth B arm 3 respectively form a circular structure from both sides of the U-shaped shell 1 to grab the pipe fittings, and the servo motor is turned on to drive the rotating shaft 41 to reverse, so that the semicircular external tooth A arm 2 and the semicircular external tooth B arm 3 can slide back into the U-shaped shell 1 for storage, and the pipe fittings can also fall.

[0029] Among them, a limit block 21 is fixedly installed on the semicircular external tooth A arm 2, and the limit block 21 passes through the semicircular slide groove 3a opened by the semicircular external tooth B arm 3 and is slidably connected with the semicircular slide groove 3a, effectively constraining the relative positions of the semicircular external tooth A arm 2 and the semicircular external tooth B arm 3 during the rotation process, preventing unnecessary deflection or dislocation when clamping or releasing the pipe, greatly improving the movement stability and overall rigidity of the device.

[0030] Furthermore, a rotating roller 5 is installed on the inner shell wall of the U-shaped shell 1, and the rotating roller 5 is rotatably connected to the inner ring wall of the semicircular external tooth A arm 2 and the semicircular external tooth B arm 3, and the inner shell wall of the U-shaped shell 1 is also installed with symmetrically distributed and rotatably connected auxiliary gears 6, and the auxiliary gears 6 are meshed and connected with the semicircular external tooth A arm 2 or the semicircular external tooth B arm 3. The arranged rotating roller 5 cooperates with the auxiliary gear 6 to further improve the stability of the semicircular external tooth A arm 2 and the semicircular external tooth B arm 3 during rotation.

[0031] In the present application, the driving component 4 drives the coaxially arranged semicircular external tooth arm A 2 and the semicircular external tooth arm B 3 to perform precise rotational motion toward / away from each other. Finally, the two semicircular arms are closed to form a nearly complete circular covering structure, achieving surface contact rather than point contact or line contact with the pipe fitting. This enveloping clamping greatly increases the contact area, significantly improves the stability and reliability of the clamping, and effectively prevents the pipe fitting from rotating or falling off during the lifting process. At the same time, its opening and closing range is adjustable, and can adapt to pipe fittings of different diameters within a certain range.

[0032] The core design of drive component 4 utilizes the principle of helical gear meshing and reversing. A servo motor drives a single rotating shaft 41. Power is transmitted to a rotating sleeve 43 through the meshing of a driving helical gear 45, an intermediate helical gear 47, and a driven helical gear 46. This results in precise, opposite rotational motion of drive gear B 44 affixed thereto and drive gear A 42, directly attached to shaft 41. This design, requiring only a single power source, precisely synchronizes the two clamping arms, resulting in a compact structure, a clear transmission chain, and high efficiency. This ensures highly synchronized movement of the two semicircular arms and balanced clamping force.

[0033] The circuits and controls involved in the present invention are all prior art and will not be described in detail here.

[0034] The above are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A pipe grabbing device, comprising a U-shaped housing (1), characterized in that: A semicircular external tooth A arm (2) and a semicircular external tooth B arm (3) are rotatably mounted in the U-shaped housing (1), and the semicircular external tooth A arm (2) and the semicircular external tooth B arm (3) are coaxially arranged; The U-shaped housing (1) is provided with a driving component (4) for driving the semicircular external tooth A arm (2) and the semicircular external tooth B arm (3) to rotate toward or away from each other, and the driving component (4) includes a rotating shaft (41), a driving A gear (42) is fixedly mounted on the rotating shaft (41), and the driving A gear (42) is meshedly connected to the semicircular external tooth B arm (3), and a driving B gear (44) is provided on the rotating shaft (41) for rotational connection, and the driving B gear (44) is meshedly connected to the semicircular external tooth A arm (2); The driving component (4) is provided with a central connecting piece, which drives the driving gear A (42) and the driving gear B (44) to rotate towards or away from each other.

2. The pipe grabbing device according to claim 1, characterized in that: A protective cover (11) is installed on the U-shaped housing (1), and a servo motor is fixedly installed in the protective cover (11) via a frame, and the output end of the servo motor is fixedly connected to the connecting end of the rotating shaft (41) via a coupling.

3. The pipe grabbing device according to claim 2, characterized in that: The intermediate link comprises a rotating sleeve (43), a driving bevel gear (45) and an intermediate link bevel gear (47). The rotating sleeve (43) is sleeved on the rotating shaft (41) and is rotatably connected to the rotating shaft (41). One end of the rotating sleeve (43) is fixedly sleeved with a driving B gear (44), and the other end of the rotating sleeve (43) is fixedly sleeved with a driven bevel gear (46). The driving bevel gear (45) is fixedly sleeved on the rotating shaft (41). The intermediate link bevel gear (47) is rotatably mounted on the inner top wall of the protective cover (11). The intermediate link bevel gear (47) is located between the driving bevel gear (45) and the driven bevel gear (46) and is respectively meshed with the driving bevel gear (45) and the driven bevel gear (46).

4. The pipe grabbing device according to claim 1, characterized in that: A limit block (21) is fixedly mounted on the semicircular external tooth A arm (2), and the limit block (21) passes through a semicircular sliding groove (3a) provided on the semicircular external tooth B arm (3) and is slidably connected to the semicircular sliding groove (3a).

5. The pipe grabbing device according to claim 1, characterized in that: A rotatably connected rotating roller (5) is mounted on the inner shell wall of the U-shaped shell (1), and the rotating roller (5) is rotatably connected to the inner ring walls of the semicircular external tooth A arm (2) and the semicircular external tooth B arm (3).

6. The pipe grabbing device according to claim 5, characterized in that: Auxiliary gears (6) that are symmetrically distributed and rotatably connected are also mounted on the inner shell wall of the U-shaped shell (1), and the auxiliary gears (6) are meshedly connected with the semicircular external tooth A arm (2) or the semicircular external tooth B arm (3).

7. The pipe grabbing device according to claim 1, characterized in that: A rotatably connected hanging ring (7) is mounted on the U-shaped housing (1).

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