A hydraulic power pliers head with automatically reset tooth seat

Abstract

The present invention relates to the technical field of oil drilling auxiliary equipment, and discloses a hydraulic power tongs head with an automatically reset tooth seat, comprising an open gear; a plurality of arc-shaped tooth plates evenly distributed on the inner wall of the open gear and detachably connected to the open gear, with the tooth surfaces of the arc-shaped tooth plates facing inward; a jaw frame arranged below the open gear, with a plurality of slides corresponding to the arc-shaped tooth plates evenly distributed in an annular pattern on the jaw frame; a plurality of tooth seats, each slidably arranged on the slide, the tooth seat comprising a mounting block, a straight tooth plate provided at one end of the mounting block facing outward, and a tooth plate detachably provided at one end of the mounting block facing inward; and a drive assembly arranged at one end of the slide facing outward. The present invention adopts a gear meshing transmission method to enable the tooth seat to move in the slide to complete the clamping of the oil pipe. Compared with the method of squeezing by the slope of the ramp plate, the present invention has a larger adjustable range and a wider range of adaptability.

Description

Technical Field

[0001] The invention relates to the technical field of oil drilling auxiliary equipment, in particular to a hydraulic power tongs head with an automatically resetting tooth seat. Background Art

[0002] Hydraulic power tongs are tools that use the power of drilling equipment to mechanically operate and remove threads. They are important auxiliary equipment for oil drilling and can greatly reduce the labor intensity of drilling workers and avoid or reduce the occurrence of injury accidents.

[0003] The existing hydraulic power tongs are generally composed of a main tong and a backup tong. The main tong plays the role of clamping and rotating the buckle, and the backup tong plays the role of clamping and fixing. The working process is generally as follows: the jaw assembly is in the initial position at the beginning. As the main tong or backup tong head rotates, the jaw assembly moves toward the center until the pipe column is clamped. During the clamping process, the jaw is driven to move by the broken plate squeezing roller. For example, Chinese patent CN217270078U provides a power tong jaw spring reset device, which provides a technical solution. The jaw plate comprises a main body, a jaw frame, a ramp plate, a jaw body, a roller, a tooth seat, a tooth block, a left torsion spring, a right torsion spring, a left pin, a right pin, a left stop pin, and a limit screw. The left stop pin and the right stop pin are respectively arranged on the left and right sides of the jaw body; one end of the left torsion spring and the right torsion spring abut against the left and right sides of the square hole in the jaw frame, and one end abuts against the left and right stop pins on the left and right sides of the jaw body; the tooth seat is inserted into the T-slot of the jaw body, and the limit screw is fixed to the end of the jaw body that blocks the tooth seat. In the present invention, the jaw plate and tooth seat are of a separate structure, and the torsion spring is installed on the jaw body.

[0004] However, the above technical solution has several problems: 1. The inward movement of the jaw body relies on the squeezing of the ramp plate on the roller, and the distance of its inward movement is positively correlated with the inclination of the ramp plate. Therefore, the adjustment range is limited and the applicability is poor; 2. The jaw body and the tooth seat rely on the elastic element for reset. After long-term use, the performance of the elastic element deteriorates, which can lead to untimely rebound or even jamming, affecting work efficiency. Summary of the Invention

[0005] To solve the above problems, the present invention adopts the following technical solutions.

[0006] A hydraulic power tongs head with automatically resettable tooth seat, comprising:

[0007] Open gear;

[0008] A plurality of arc-shaped tooth plates are evenly distributed on the inner wall of the open gear and are detachably connected to the open gear, with the tooth surfaces of the arc-shaped tooth plates facing inward;

[0009] The jaw frame is arranged below the open gear, and a plurality of slide grooves corresponding to the arc-shaped tooth plates are evenly distributed on the jaw frame. One end of the slide groove points to one end of the arc-shaped tooth plate, and the other end points to the center of the open gear;

[0010] There are several tooth seats, each of which is slidably arranged on the sliding seat. The tooth seat includes a mounting block, an outward end of the mounting block is provided with a straight tooth plate, and an inward end of the mounting block is detachably provided with a tooth plate;

[0011] The driving assembly is arranged at the outward end of the slide, and includes a mounting frame, a first rotating shaft is vertically arranged on the mounting frame, and a gear 1 and a gear 2 are longitudinally arranged on the first rotating shaft. The gear 2 is engaged with the straight tooth plate, and the gear 1 is engaged with the arc tooth plate.

[0012] Preferably, a placement rack is further provided on the jaw plate rack, and the placement rack is a frame structure, a mounting hole is provided at the lower end of the placement rack, a spring 2 is provided in the mounting hole, a sphere is provided at the top end of the spring 2, the sphere is exposed from the mounting hole, and a spherical groove is provided at the bottom of the tooth plate corresponding to the sphere.

[0013] The rear end of the tooth plate is provided with a notch, and the inner walls on both sides of the notch are provided with card slots. The side of the mounting block facing inward is provided with a spring sheet horizontally and symmetrically, and the front end of the spring sheet is provided with a card block. A push rod is provided between the two spring sheets, and a spring three is provided at the front end of the push rod. An inclined pressure sheet is provided on the opposite side of the two spring sheets. Two pressure rods are provided on the jaw plate frame, and the two pressure rods are respectively located on the outside of the two spring sheets.

[0014] The pressing rod is located on a side of the pressing piece away from the tooth plate, and the pressing piece expands and tilts outwards toward the tooth plate.

[0015] Preferably, two spur gear plates are provided, which are symmetrically arranged at the outward end of the mounting block, the tooth surfaces of the two spur gear plates are arranged opposite to each other, and the mounting frame is arranged between the two spur gear plates. The mounting frame is also vertically provided with a second rotating shaft and a third rotating shaft, and gear three is provided on the second rotating shaft and the third rotating shaft. The two gears three are meshed with each other and the two gears three are respectively meshed with the spur gear plates on their outer sides, and gear two is meshed with one of the gears three.

[0016] Preferably, the second rotating shaft and the third rotating shaft are arranged on both sides of the center line of the slide groove, and are at the same vertical distance from the center line of the annular groove, and the first rotating shaft is located on the center line of the slide groove.

[0017] Preferably, the mounting block is provided with a plurality of sockets 1 at the front end, a limit plate is provided at the outer end of the socket 1, a sliding rod is provided on the inward side of the tooth plate, the sliding rod slides in the socket 1, a spring 1 is provided in the socket 1, a limit ring is provided on the sliding rod, and a set of springs is provided on the sliding rod and the outward end is in contact with the limit ring.

[0018] Preferably, the exposed portion of the sphere is less than or equal to half the volume of the sphere.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The present invention adopts the gear meshing transmission method to make the tooth seat move in the slide groove to complete the clamping of the oil pipe. Compared with the method of using the slope of the ramp plate to squeeze, the present invention has a larger adjustment range and a wider range of adaptability.

[0021] 2. The present invention uses the tooth seat to reset by following the reverse rotation of the open gear. Compared with the existing technology that uses the elastic tension of the elastic element to reset, it is more reliable and avoids the problem of delayed rebound or even jamming due to the performance degradation of the elastic element after long-term use, which affects work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the overall structure of embodiment 1 of the present invention;

[0023] Figure 2 This is a schematic diagram of the structure of a drive assembly according to an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the meshing state of gear 1 and the spur plate in embodiment 2 of the present invention;

[0025] Figure 4 Schematic diagram of the meshing state of gear 2, gear 3, gear 4 and the spur plate in embodiment 2 of the present invention;

[0026] Figure 5 This is a schematic diagram of the three-tooth seat structure according to an embodiment of the present invention;

[0027] Figure 6 This is a schematic diagram of the connection between the fourth tooth plate and the placement rack according to the embodiment of the present invention;

[0028] Figure 7 This is a schematic diagram of the contact state between the push rod and the bottom of the second socket according to the fourth embodiment of the present invention;

[0029] Figure 8 This is a schematic diagram of the engagement between the card block and the card slot in embodiment 4 of the present invention.

[0030] Figure: 1. Open gear; 2. Jaw plate frame; 3. Curved tooth plate; 4. Slide; 5. Tooth seat; 6. Drive assembly; 7. Placement frame; 5-1. Mounting block; 5-2. Straight tooth plate; 5-3. Tooth plate; 5-4. Jack 1; 5-5. Spring 1; 5-6. Slide bar; 5-7. Limit plate; 5-8. Limit ring; 5-9. Spherical groove; 5-10. Notch; 5-11. Slot; 5-12 , jack two; 5-13, spring; 5-14, block; 5-15, push rod; 5-16, spring three; 5-17, pressure piece; 5-18, pressure rod; 6-1, mounting bracket; 6-2, first rotating shaft; 6-3, gear one; 6-4, gear two; 6-5, second rotating shaft; 6-6, third rotating shaft; 6-7, gear three; 7-1, mounting hole; 7-2, spring two; 7-3, sphere. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0032] In the description of the present invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "mounted / connected," and "connected" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention in specific circumstances. Example 1

[0034] like Figure 1-2As shown, the present invention provides a hydraulic power tongs head with an automatically reset tooth seat 5, comprising an open gear 1 and a jaw plate frame 2, three arc-shaped tooth plates 3 are evenly distributed in an annular manner on the inner side of the open gear 1, the tooth surface of the arc-shaped tooth plate 3 is arranged inward, the arc-shaped tooth plate 3 is connected to the inner wall of the open gear 1 by screws, the jaw plate frame 2 is arranged below the open tooth plate 1, and three slide grooves 4 corresponding to the arc-shaped tooth plates 3 are evenly distributed in an annular manner on the jaw plate frame 2, one end of the slide groove 4 points to one end of the arc-shaped tooth plate 3, and the other end points to the center of the open gear 1, and a tooth plate 3 is slidably arranged in the slide groove 4. The seat 5 and the tooth seat 5 include a mounting block 5-1, a straight tooth plate 5-2 is provided at the outward end of the mounting block 5-1, and a tooth plate 5-3 is provided at the inward end of the mounting block 5-1 through a screw connection. A driving assembly 6 is also provided at the outward end of the slide 4 for driving the tooth seat 5 to move. The driving assembly 6 includes a mounting frame 6-1, a first rotating shaft 6-2 is vertically provided on the mounting frame 6-1, and a gear 1 6-3 and a gear 2 6-4 are longitudinally provided from top to bottom on the first rotating shaft 6-2. The gear 2 6-4 is engaged with the straight tooth plate 5-2, and the gear 1 6-3 is engaged with the arc-shaped tooth plate 3.

[0035] The working principle of the above technical solution is:

[0036] When performing the oil pipe clamping operation, the open gear 1 rotates first, and the jaw frame 2 does not rotate under the action of the brake of the open power pliers. As the open gear 1 rotates, the three arc-shaped tooth plates 3 set on the inner wall of the open gear 1 mesh with gear 1 6-3 for transmission, thereby driving gear 1 6-3 to rotate on its own. While the gear 1 6-3 rotates, it drives the gear 2 6-4 coaxially set therewith to rotate, and the gear 2 6-4 meshes with the straight tooth plate 5-2, thereby driving the mounting block 5-1 to move toward the center of the open gear 1, so that the tooth plate 5-3 contacts the oil pipe, thereby realizing the clamping of the oil pipe by the three tooth plates 5-3. At this time, since the arc-shaped tooth plate 3 and gear 1 6-3 can no longer be displaced, when the rotational torque of the open gear 1 is greater than the braking force of the brake on the jaw frame 2, the open gear 1 drives the arc-shaped tooth plate 3, the tooth seat 5, the tooth plate 5-3 and the oil pipe to rotate together.

[0037] Compared with the prior art, the present invention has the following beneficial effects:

[0038] 1. The present invention adopts the gear meshing transmission method to make the tooth seat 5 move in the slide groove 4 to complete the clamping of the oil pipe. Compared with the method of using the slope of the ramp plate to squeeze, the present invention has a larger adjustment range and a wider range of adaptability.

[0039] 2. The present invention uses the tooth seat 5 to reset by following the reverse rotation of the open gear 1. Compared with the prior art that uses the elastic tension of the elastic element to reset, it is more reliable and avoids the problem of delayed rebound or even jamming due to the performance degradation of the elastic element after long-term use, which affects work efficiency. Example 2

[0040] like Figure 3-4 As shown, in order to make the force applied to the tooth seat 5 more balanced and avoid slight deflection of the tooth seat 5, thereby causing wear and reducing the service life, on the basis of implementation one, this embodiment has two straight tooth plates 5-2, which are symmetrically arranged at the outward end of the mounting block 5-1, the tooth surfaces of the two straight tooth plates 5-2 are arranged oppositely, the mounting bracket is arranged between the two straight tooth plates 5-2, and the mounting bracket 6-1 is also vertically provided with a second rotating shaft 6-5 and a third rotating shaft 6-6, the second rotating shaft 6-5 and the third rotating shaft 6-6 are arranged vertically. The rotating shaft 6-6 is arranged on both sides of the center line of the slide groove 4, and the vertical distance from the center line of the ring groove is equal. The first rotating shaft 6-2 is located on the center line of the slide groove 4. The second rotating shaft 6-5 and the third rotating shaft 6-6 are provided with gear three 6-7. The two gear three 6-7 are meshed with each other and the two gear three 6-7 are respectively meshed with the straight tooth plate 5-2 on their outer sides. The first rotating shaft 6-2 is arranged between the second rotating shaft 6-5 and the third rotating shaft 6-6, and the gear two 6-4 is meshed with one of the gear three 6-7. Example 3

[0041] like Figure 5 As shown, in order to make the tooth plate 5-3 softer when docking with the pipeline and prevent damage to the pipeline caused by impact, on the basis of implementation one, in this embodiment, a plurality of sockets 5-4 are provided at the front end of the mounting block 5-1, and a limiting plate 5-7 is provided at the outer end of the socket 5-4. A slide bar 5-6 is provided on the inward side of the tooth plate 5-3, and the slide bar 5-6 slides in the socket 5-4. A spring 5-5 is provided in the socket 5-4, and a limiting ring 5-8 is provided on the slide bar 5-6. The spring 5-5 is sleeved on the slide bar 5-6 and the outward end is in contact with the limiting ring 5-8. Example 4

[0042] like Figure 6-8 As shown, in order to facilitate the rapid replacement of the tooth plate 5-3 and to adapt to oil pipes of different sizes, on the basis of implementation two, in this embodiment, a placement rack 7 is further provided on the jaw plate frame 2, and the placement rack 7 is a frame structure. The lower end of the placement rack 7 is provided with a mounting hole 7-1 passing through the placement rack 7, and a spring 2 7-2 is provided in the mounting hole 7-1. A sphere 7-3 is provided at the top of the spring 2 7-2, and the sphere 7-3 is exposed from the mounting hole 7-1. A spherical groove 5-9 is provided at the bottom of the tooth plate 5-3 corresponding to the sphere 7-3.

[0043] In this embodiment, the exposed portion of the sphere 7 - 3 is less than or equal to half the volume of the sphere 7 - 3 . This setting is to ensure that the tooth plate 5 - 3 can be smoothly clamped in the placement rack 7 .

[0044] In this embodiment, a notch 5-10 is provided at the rear end of the tooth plate 5-3, and slots 5-11 are provided on the inner walls on both sides of the notch 5-10. A socket two 5-12 is provided in the center of the notch 5-10. A spring piece 5-13 is horizontally and symmetrically provided on the inward side of the mounting block 5-1, and a clamping block 5-14 is provided on the forward end of the spring piece 5-13. A push rod 5-15 is provided between the two spring pieces 5-13, and a spring three 5-16 is provided at the front end of the push rod 5-15. An inclined pressure piece 5-17 is provided on the opposite side of the two spring pieces 5-13. Two pressure rods 5-18 are provided on the jaw plate frame 2, and the two pressure rods 5-18 are respectively located on the outside of the two spring pieces 5-13.

[0045] In this embodiment, the pressure rod 5-18 is located on the side of the pressing plate 5-17 away from the tooth plate 5-3, and the pressing plate 5-17 is inclined to expand outward toward the pressing plate.

[0046] The working principle and beneficial effects of the above technical solution are:

[0047] During use, the threaded plate 5-3 is first clamped in the placement frame. At this time, the ball 7-3 fixes the threaded plate 5-3 under the action of the second spring 7-2. During the clamping operation, the mounting plate moves inward, and the spring 5-13 extends into the notch 5-10. The clamping block 5-14 continues to move forward after passing through the clamping groove 5-11 until the push rod 5-15 contacts the bottom of the second socket 5-12. At this time, the threaded plate 5-3, pushed by the push rod 5-15, moves along with the mounting block 5-1 and moves out of the anti-placement frame until it contacts the oil pipe. During resetting, the card block 5-14 is engaged in the card slot 5-11, thereby dragging the tooth plate 5-3 to move until the tooth plate 5-3 moves into the placement frame, and the ball 7-3 is engaged in the spherical groove 5-9. At this time, the mounting block 5-1 continues to move backward, and the pressing piece 5-17 on the spring piece 5-13 is squeezed by the pressure rod 5-18 and shrinks inward. At this time, the card block 5-14 is separated from the card slot 5-11.

[0048] Compared with the detachable method using screws, the solution provided in this embodiment can be quickly replaced without the aid of tools, thereby improving usage efficiency.

[0049] The above are only preferred embodiments of the present invention; however, the scope of protection of the present invention is not limited thereto. Any person skilled in the art who, within the technical scope disclosed by the present invention, makes equivalent substitutions or modifications based on the technical solutions and improved concepts of the present invention shall be covered by the scope of protection of the present invention.

Claims

1. A hydraulic power tongs head with automatically resettable tooth seat, characterized in that: include, Open gear (1); A plurality of arc-shaped tooth plates (3) are evenly distributed on the inner wall of the open gear (1) and are detachably connected to the open gear (1), with the tooth surfaces of the arc-shaped tooth plates (3) facing inward; A jaw frame (2) is arranged below the open gear (1), and a plurality of slide grooves (4) corresponding to the arc-shaped tooth plates (3) are evenly distributed on the jaw frame (2) in an annular shape, one end of the slide groove (4) points to one end of the arc-shaped tooth plate (3), and the other end points to the center of the open gear (1); A plurality of tooth seats (5) are provided, each of which is slidably arranged on the slide seat. The tooth seat (5) comprises a mounting block (5-1), a straight tooth plate (5-2) is provided at an outward end of the mounting block (5-1), and a tooth plate (5-3) is detachably provided at an inward end of the mounting block (5-1); The driving assembly (6) is arranged at the outward end of the slide (4), and includes a mounting frame (6-1). A first rotating shaft (6-2) is vertically arranged on the mounting frame (6-1). Gear 1 (6-3) and gear 2 (6-4) are longitudinally arranged on the first rotating shaft (6-2). Gear 2 (6-4) is meshed with the straight tooth plate (5-2), and gear 1 (6-3) is meshed with the arc tooth plate (3). A placement rack (7) is further provided on the jaw plate rack (2), the placement rack (7) being a frame structure, a mounting hole (7-1) being provided at the lower end of the placement rack (7), a second spring (7-2) being provided in the mounting hole (7-1), a sphere (7-3) being provided at the top end of the second spring (7-2), the sphere (7-3) being exposed from the mounting hole (7-1), and a spherical groove (5-9) being provided at the bottom of the tooth plate (5-3) corresponding to the sphere (7-3). The rear end of the tooth plate (5-3) is provided with a notch (5-10), and the inner walls on both sides of the notch (5-10) are provided with a clamping groove (5-11). The inner side of the mounting block (5-1) is horizontally and symmetrically provided with a spring (5-13), and the front end of the spring (5-13) is provided with a clamping block (5-14). A push rod (5-15) is provided between the two springs (5-13), and a spring three (5-16) is provided at the front end of the push rod (5-15). An inclined pressing piece (5-17) is provided on the opposite side of the two springs (5-13). Two pressing rods are provided on the jaw plate frame (2), and the two pressing rods are respectively located on the outside of the two springs (5-13). The pressing rod is located on a side of the pressing plate (5-17) away from the tooth plate (5-3), and the pressing plate (5-17) is inclined to expand outwards towards the tooth plate (5-3).

2. A hydraulic power tongs head with automatically resetting tooth holder according to claim 1, characterized in that: Two spur-tooth plates (5-2) are provided and symmetrically arranged at one end of the mounting block (5-1) facing outwards. The tooth surfaces of the two spur-tooth plates (5-2) are arranged opposite to each other. The mounting frame (6-1) is arranged between the two spur-tooth plates (5-2). A second rotating shaft (6-5) and a third rotating shaft (6-6) are vertically arranged on the mounting frame (6-1). Gear three (6-7) is provided on the second rotating shaft (6-5) and the third rotating shaft (6-6). The two gear threes (6-7) are meshed with each other and the two gear threes (6-7) are respectively meshed with the spur-tooth plates (5-2) on their outer sides. Gear two (6-4) is meshed with one of the gear threes (6-7).

3. The hydraulic power tongs head with automatically resetting tooth seat according to claim 2, characterized in that: The second rotating shaft (6-5) and the third rotating shaft (6-6) are arranged on both sides of the center line of the slide groove (4) and are at equal vertical distances from the center line of the annular groove. The first rotating shaft (6-2) is located on the center line of the slide groove (4).

4. The hydraulic power tongs head with automatically resetting tooth seat according to claim 1, characterized in that: The mounting block (5-1) is provided with a plurality of sockets (5-4) at the front end, a limiting plate (5-7) is provided at the outer end of the socket (5-4), a sliding rod (5-6) is provided on the inner side of the tooth plate (5-3), the sliding rod (5-6) slides in the socket (5-4), a spring (5-5) is provided in the socket (5-4), a limiting ring (5-8) is provided on the sliding rod (5-6), and the spring (5-5) is sleeved on the sliding rod (5-6) and the outer end thereof contacts the limiting ring (5-8).

5. The hydraulic power tongs head with automatically resetting tooth seat according to claim 1, characterized in that: The exposed portion of the sphere (7-3) is less than or equal to half the volume of the sphere (7-3).

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