A hydraulic power caliper with low-wear braking structure

Abstract

The present invention relates to the technical field of hydraulic power pliers, and discloses a hydraulic power pliers with a low-wear braking structure, comprising a brake disc, a brake assembly being arranged on the outer side of the brake disc, the brake assembly comprising a friction braking mechanism and a magnetic anti-loosening mechanism, the magnetic anti-loosening mechanism comprising an inner ring body, the inner ring body being coaxially arranged on the top of the brake disc, a plurality of placement racks 1 being uniformly arranged in an annular pattern on the outer side wall of the inner ring body, two magnetic plates 1 being detachably arranged in the placement rack 1, the two magnetic plates 1 having the same magnetic properties on opposite sides, the friction braking mechanism comprising a shell, a brake band being arranged in the shell, the brake band being in contact with the outer side of the brake disc, an outer ring body being arranged on the inner side of the shell, a plurality of magnetic plates 2 being movably arranged on the outer ring body, the plurality of magnetic plates 2 being uniformly arranged in an annular pattern on the inner side of the outer ring body, the magnetic properties of the side of the magnetic plate 2 opposite to the clamping rotation direction being opposite to the magnetic properties of the opposite magnetic plate 1.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic power tongs, in particular to a hydraulic power tongs with a low-wear braking structure. Background Art

[0002] With the continuous advancement of oil and gas extraction technology, hydraulic power tongs are increasingly used in well repair operations. Currently, hydraulic power tongs have become an indispensable tool in well repair operations. Their application is not only in conventional oil well repair operations, but is also gradually expanding into emerging areas such as deep-sea oil and gas fields and shale gas development. In these areas, hydraulic power tongs, with their unique advantages, have made significant contributions to the development of the oil and gas industry. Hydraulic power tongs offer numerous advantages over traditional pipe tongs or chain tongs. First, they significantly reduce the workload of well repair workers and improve work efficiency. Second, hydraulic power tongs can enhance the torque of threads on pipes and drill tools, reducing the occurrence of tripping accidents and improving operational safety. Furthermore, hydraulic power tongs are simple to operate and easy to maintain, meeting the needs of various scenarios.

[0003] Chinese patent CN214197049U discloses a novel caliper brake mechanism, which is arranged on the upper and lower surfaces of a housing. It mainly consists of a brake band, a brake cylinder for tightening the brake band, a brake band clamp for fixing the brake band, and a set screw for connecting the brake cylinder and the brake band. The brake band includes a brake band hoop and a brake band. The inner and outer circles of the brake band are arc-shaped, and the brake band hoop and the brake band are connected as a whole by rivets, with the brake band hoop on the outside and the brake band on the inside. The brake band fits in place with the outer circles of the upper jaw frame and the lower jaw frame. The brake cylinder is fixedly connected to the upper and lower surfaces of the housing. By extending the telescopic rod of the brake cylinder, the brake band is tightened, increasing the friction between the brake band and the upper jaw frame and the lower jaw frame. The use of the present invention solves the problem of insufficient braking force causing the main caliper to slip. By increasing the friction between the brake band and the jaw frame, the braking performance is reliable and the main caliper slip is avoided.

[0004] The technical solution provided by the above patent solves the problem of insufficient braking force. However, during use, since the braking force is completely provided by the long-term friction between the brake band and the upper jaw plate frame and the lower jaw plate frame, the brake band is severely worn and needs to be inspected and replaced frequently, which increases the workload and also increases the cost of use and reduces the convenience of use. Summary of the Invention

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

[0006] A hydraulic power caliper with a low-wear braking structure includes a brake disc, a brake assembly is provided on the outside of the brake disc for rotating the brake disc, and the brake assembly includes a friction brake mechanism and a magnetic anti-loosening mechanism.

[0007] The magnetic anti-loosening mechanism includes an inner ring body, which is coaxially arranged on the top of the brake disc. The outer wall of the inner ring body is evenly distributed with a plurality of placement racks. Two magnetic pieces are detachably arranged in the placement racks. The opposite sides of the two magnetic pieces have the same magnetic properties.

[0008] The friction brake mechanism includes a shell, a brake band is arranged in the shell, the brake band is in contact with the outer side of the brake disc, an outer ring body is arranged coaxially with the inner ring body on the inner side of the shell, and a plurality of magnetic pieces 2 are movably arranged on the outer ring body. The plurality of magnetic pieces 2 are evenly distributed in an annular manner on the inner side of the outer ring body, and the magnetism of the side of the magnetic piece 2 opposite to the clamping rotation direction is opposite to the magnetism of the opposite magnetic piece 1.

[0009] Preferably, a vertically arranged jack is provided in the middle of the placement rack, and openings are provided on the left and right sides of the placement rack.

[0010] Preferably, a second placement rack is provided inside the outer ring body through a vertically arranged torsion spring for rotation, and the second magnetic piece is inserted into the second placement rack.

[0011] Preferably, cushion pads are provided on both sides of the second placement rack.

[0012] Preferably, the inner ring body includes a horizontally arranged annular disk body, a cylinder body is vertically arranged on the inner wall of the annular disk body, a placement frame 1 is arranged on the outer wall of the cylinder body, and the outer wall of the annular disk body is divided into several installation areas by several placement frames 1, and the half of each installation area relative to the clamping rotation direction is the front half area, and the other side is the rear half area, and an arc-shaped rack is arranged on the outside of the front half area, and a notch is provided on the top of the shell toward the rear half area, and a gear 1 is provided on the side of the notch close to the front half area, and the gear 1 extends out of the notch and fits with the arc-shaped rack, and a tooth plate is provided on the side of the gear away from the front half area for meshing, and a placement frame 3 is provided on the inward end of the tooth plate, and a magnetic piece 2 is provided in the placement frame 3, and a slide groove is provided in the shell, and the tooth plate slides in the slide groove.

[0013] Preferably, a return spring is connected to the rear end of the tooth plate, and the other end of the return spring is against the inner wall of the shell.

[0014] Preferably, gear 2, gear 3 and gear 4 are further provided in the housing, gear 1 is meshed with gear 2, gear 2 is coaxial with gear 3, gear 3 is meshed with gear 4, and gear 4 is meshed with the gear plate.

[0015] Preferably, the number of teeth of gear one is greater than that of gear two, and the number of teeth of gear three is greater than that of gear two.

[0016] Preferably, a plurality of heat dissipation openings are provided on the outward side of the shell.

[0017] Preferably, a plurality of heat sinks are hingedly provided on the outer side of the brake band, the middle portion of the heat sink is rotatably connected to the shell via a rotating shaft, and the other end of the heat sink extends out of the heat dissipation port.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The present invention provides a magnetic anti-loosening mechanism and utilizes the force of the second magnetic plate arranged in the second placement rack on the two first magnetic plates arranged in the first placement rack, thereby always providing a driving force in the tightening direction to the brake disc, thereby reducing the friction between the brake band and the brake disc, thereby reducing loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 for Figure 1 Schematic diagram of the local structure at point A;

[0022] Figure 3 This is a schematic diagram of the overall structure of the second embodiment of the present invention;

[0023] Figure 4 It is a schematic diagram of the local structure of the magnetic anti-loosening mechanism;

[0024] Figure 5 Schematic diagram of the local structure of the friction brake mechanism.

[0025] In the figure: 1. brake disc; 2. friction brake mechanism; 3. magnetic anti-loosening mechanism; 2-1. shell; 2-2. brake band; 2-3. outer ring; 2-4. torsion spring; 2-5. placement rack 2; 2-6. magnetic disk 2; 2-7. buffer pad; 2-8. notch; 2-9. gear 1; 2-10. tooth plate; 2-11. placement rack 3; 2-12. slide; 2-13. return spring; 2-14. gear 2; 2-15. gear 3; 2-16. gear 4; 2-17. heat dissipation vent; 2-18. heat sink; 3-1. inner ring; 3-2. placement rack 1; 3-3. magnetic disk 1; 3-4. jack; 3-5. opening; 3-11. annular disk; 3-12. cylinder; 3-13. arc-shaped rack. DETAILED DESCRIPTION

[0026] 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.

[0027] 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.

[0028] 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

[0029] like Figure 1-2 As shown, in this embodiment, a hydraulic power caliper with a low-wear braking structure includes a brake disc 1. A brake assembly is provided on the outside of the brake disc 1 for limiting the rotation of the brake disc 1. The brake assembly includes a friction brake mechanism 2 and a magnetic anti-loosening mechanism 3.

[0030] In this embodiment, the magnetic anti-loosening mechanism 3 includes an inner ring 3-1 having a C-shaped structure. The inner ring 3-1 is coaxially mounted on the top of the brake disc 1. A plurality of mounting brackets 3-2 are evenly distributed around the outer wall of the inner ring 3-1. A vertically disposed square insertion hole 3-4 is disposed in the center of the mounting brackets 3-2. Openings 3-5 are disposed on the left and right sides of the mounting brackets 3-2. Two magnetic plates 3-3 are inserted into the mounting brackets 3-2. The opposing sides of the two magnetic plates 3-3 have the same magnetic properties. In this embodiment, the opposing sides of the two magnetic plates 3-3 are north poles, and the opposing sides are south poles.

[0031] In this embodiment, the friction brake mechanism 2 includes a housing 2-1, within which a brake band 2-2 is disposed, contacting the outer side of the brake disc 1. An outer ring 2-3 is disposed inwardly of the housing 2-1, coaxially arranged with an inner ring 3-1. A second mounting bracket 2-5 is rotatably mounted on the inner sidewall of the outer ring 2-3 via a vertically disposed torsion spring 2-4. A second magnetic plate 2-6 is disposed within the second mounting bracket 2-5. The magnetic properties of the side of the second magnetic plate 2-6 opposite the direction of clamping rotation are opposite to those of the opposing first magnetic plate 3-3. In this embodiment, the side of the second magnetic plate 2-6 opposite the direction of clamping rotation has an S pole.

[0032] In this embodiment, buffer pads 2-7 are provided on both sides of the second placement rack 2-5.

[0033] The working principle of the above technical solution is:

[0034] During use, in the process of clamping the drill pipe, the brake disc 1 rotates accordingly. When the brake disc 1 rotates, it drives the inner ring body 3-1 to rotate. When the inner ring body 3-1 rotates, the magnetic piece 1 3-3 thereon rotates accordingly. When the magnetic piece 1 3-3 approaches the magnetic piece 2 2-6, different magnetic poles attract each other, providing a rotational pulling force. When the magnetic piece 1 3-3 passes through the magnetic piece 2 2-6, the placement rack 2 2-5 deflects under the action of pressure, thereby ensuring the smooth passage of the placement rack 1 3-2. When the magnetic piece 1 3-3 passes through the magnetic piece 2 2-6, the same magnetic poles repel each other, providing a thrust, thereby increasing the driving force during clamping and improving work efficiency. When the drill rod is fully tightened, the brake band 2-2 is clamped to the brake disc 1 by the driving mechanism provided at one end of the brake band 2-2, thereby preventing it from loosening. At the same time, under the action of magnetic force, the magnetic piece 2 2-6 and the magnetic piece 1 3-3 provide a driving force in the clamping direction, thereby also preventing loosening, reducing the load on the brake band 2-2, and thus reducing the wear of the brake band 2-2.

[0035] Compared with the prior art, the present invention has the following beneficial effects:

[0036] The present invention provides a magnetic anti-loosening mechanism 3 and utilizes the force of the magnetic piece 2-6 provided in the placement rack 2-5 on the two magnetic pieces 1-3-3 provided in the placement rack 1-3-2, thereby always providing a driving force in the tightening direction to the brake disc 1, thereby reducing the friction between the brake band 2-2 and the brake disc 1, thereby reducing losses. Example 2

[0037] like Figure 3-4 As shown, in this embodiment, a hydraulic power caliper with a low-wear braking structure includes a brake disc 1. A brake assembly is provided on the outside of the brake disc 1 for limiting the rotation of the brake disc 1. The brake assembly includes a friction brake mechanism 2 and a magnetic anti-loosening mechanism 3.

[0038] In this embodiment, the magnetic anti-loosening mechanism 3 includes an inner ring body 3-1, which is a C-shaped structure. The inner ring body 3-1 is coaxially arranged on the top of the brake disc 1. The inner ring body 3-1 includes a horizontally arranged annular disc body 3-11, and the inner side wall of the annular disc body 3-11 is vertically provided with a cylinder body 3-12. A placement rack 3-2 is arranged on the outer side wall of the cylinder body 3-12. A plurality of placement racks 3-2 are evenly distributed in an annular manner on the outer side wall of the inner ring body 3-1. The outer side wall of the annular disc body 3-11 is divided into a plurality of installation areas by the plurality of placement racks 3-2. The half of each installation area relative to the clamping rotation direction is the front half area, and the other half area is the rear half area. The outer side is the rear half area, and an arc-shaped rack 3-13 is provided on the outer side of the front half area. A notch 2-8 is provided on the top of the shell 2-1 facing the rear half area, and a gear 2-9 is provided on the side of the notch 2-8 close to the front half area. The gear 2-9 extends out of the notch 2-8 and engages with the arc-shaped rack 3-13. The gear 2-9 is engaged with a tooth plate 2-10 on the side away from the front half area. A placement rack 3 2-11 is provided at the inward end of the tooth plate 2-10, and a magnetic piece 2-6 is provided in the placement rack 3 2-11. A slide groove 2-12 is provided in the shell 2-1, and the tooth plate 2-10 slides in the slide groove 2-12.

[0039] In this embodiment, a vertically arranged square socket 3-4 is provided in the middle of the first placement rack 3-2. Openings 3-5 are provided on the left and right sides of the first placement rack 3-2. Two magnetic plates 3-3 are inserted into the first placement rack 3-2. The opposing sides of the two magnetic plates 3-3 have the same magnetic properties. In this embodiment, the opposing sides of the two magnetic plates 3-3 are north poles, and the opposing sides are south poles.

[0040] In this embodiment, the friction brake mechanism 2 includes a housing 2 - 1 , a brake band 2 - 2 is disposed in the housing 2 - 1 , and the brake band 2 - 2 contacts the outer side of the brake disc 1 .

[0041] In this embodiment, the magnetism of the side of the second magnetic piece 2-6 opposite to the clamping rotation direction is opposite to the magnetism of the opposite magnetic piece 1 3-3. In this embodiment, the side of the second magnetic piece 2-6 opposite to the clamping rotation direction is the S pole.

[0042] In this embodiment, a return spring 2-13 is connected to the rear end of the tooth plate 2-10, and the other end of the return spring 2-13 is against the inner wall of the shell 2-1.

[0043] In this embodiment, housing 2-1 further includes gear 2-14, gear 3-15, and gear 4-16. Gear 1-9 meshes with gear 2-14, gear 2-14 is coaxial with gear 3-15, gear 3-15 meshes with gear 4-16, and gear 4-16 meshes with toothed plate 2-10. Gear 1-9 has a greater number of teeth than gear 2-14, and gear 3-15 has a greater number of teeth than gear 2-14.

[0044] The working principle and beneficial effects of the above technical solution are:

[0045] When in use, in the process of clamping the drill pipe, the brake disc 1 rotates along, and when the brake disc 1 rotates, it drives the inner ring body 3-1 to rotate. When the inner ring body 3-1 rotates, the magnetic piece 1 3-3 on it follows the rotation. When the magnetic piece 1 3-3 approaches the magnetic piece 2 2-6, the different magnetic poles attract each other, providing a rotational pulling force. When the arc rack 3-13 contacts the gear 1 2-9, the gear 1 drives the gear 2 2-14 to rotate, the gear 2 2-14 drives the gear 3 2-15 to rotate, the gear 3 2-15 drives the gear 4 2-16 to rotate, and the gear 4 2-16 drives the tooth plate 2-10 to move in the slide groove 2-12, so that the placement rack 2 2-5 is stored in the shell 2-1, and when the magnetic piece 1 3-3 passes the magnetic piece 2 2-6, the tooth plate 2-10 is reset under the action of the reset spring 2-13. At this time, the same magnetic poles repel each other, providing a thrust, thereby increasing the driving force during clamping and improving work efficiency. When the drill rod is fully tightened, the brake band 2-2 is clamped to the brake disc 1 by the driving mechanism provided at one end of the brake band 2-2, thereby preventing it from loosening. At the same time, under the action of magnetic force, the magnetic piece 2 2-6 and the magnetic piece 1 3-3 provide a driving force in the clamping direction, thereby also preventing loosening, reducing the load on the brake band 2-2, and thus reducing the wear of the brake band 2-2. Example 3

[0046] like Figure 5 As shown, based on the second embodiment, the housing 2-1 is provided with a plurality of heat dissipation openings 2-17 on the outward side. The brake band 2-2 is hingedly provided with a plurality of heat dissipation fins 2-18 on the outer side. The middle portion of the heat dissipation fins 2-18 is rotatably connected to the housing 2-1 via a rotating shaft, and the other end of the heat dissipation fins 2-18 extends out of the heat dissipation openings 2-17.

[0047] In this embodiment, the heat dissipation efficiency of the brake band 2-2 during braking is improved by disposing the heat sink 2-18, thereby lowering the temperature and reducing the loss.

[0048] 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 caliper with a low-wear braking structure, characterized in that: The invention comprises a brake disc (1), wherein a brake assembly is provided on the outer side of the brake disc (1) for rotating the brake disc (1), wherein the brake assembly comprises a friction brake mechanism (2) and a magnetic anti-loosening mechanism (3). The magnetic anti-loosening mechanism (3) comprises an inner ring body (3-1), the inner ring body (3-1) is coaxially arranged on the top of the brake disc (1), and a plurality of placement racks (3-2) are evenly distributed in an annular shape on the outer wall of the inner ring body (3-1), and two magnetic sheets (3-3) are detachably arranged in the placement racks (3-2), and the opposite sides of the two magnetic sheets (3-3) have the same magnetic properties. The friction brake mechanism (2) comprises a shell (2-1), a brake band (2-2) is arranged in the shell (2-1), the brake band (2-2) is in contact with the outer side of the brake disc (1), an outer ring body (2-3) is arranged coaxially with the inner ring body (3-1) on the inner side of the shell (2-1), a plurality of magnetic pieces (2-6) are movably arranged on the outer ring body (2-3), and the plurality of magnetic pieces (2-6) are evenly distributed in an annular shape on the inner side of the outer ring body (2-3), and the magnetism of the side of the magnetic piece (2-6) opposite to the clamping rotation direction is opposite to the magnetism of the opposite magnetic piece (3-3).

2. The hydraulic power caliper with a low-wear brake structure according to claim 1, characterized in that: A vertically arranged socket (3-4) is provided in the middle of the first placement rack (3-2), and openings (3-5) are provided on the left and right sides of the placement rack.

3. The hydraulic power caliper with a low-wear brake structure according to claim 1, characterized in that: A second placement rack (2-5) is rotatably arranged on the inner side of the outer ring body (2-3) via a vertically arranged torsion spring (2-4), and a second magnetic sheet (2-6) is inserted into the second placement rack (2-5).

4. The hydraulic power caliper with a low-wear brake structure according to claim 3, characterized in that: Buffer pads (2-7) are provided on both sides of the second placement rack (2-5).

5. The hydraulic power caliper with a low-wear brake structure according to claim 1, characterized in that: The inner ring body (3-1) includes a horizontally arranged annular disc body (3-11), a cylinder body (3-12) is vertically arranged on the inner side wall of the annular disc body (3-11), a placement rack (3-2) is arranged on the outer side wall of the cylinder body (3-12), and the outer side wall of the annular disc body (3-11) is divided into a plurality of installation areas by a plurality of placement racks (3-2), the half of each installation area relative to the clamping rotation direction is the front half area, and the other side is the rear half area, an arc-shaped rack (3-13) is arranged on the outer side of the front half area, and a notch (2-13) is arranged on the top of the shell (2-1) toward the rear half area. -8), a gear one (2-9) is provided on a side of the slot (2-8) close to the front half area, the gear one (2-9) extends out of the slot (2-8) and meshes with the arc-shaped rack (3-13), a toothed plate (2-10) is provided on a side of the gear one (2-9) away from the front half area, a placement rack three (2-11) is provided at an inward end of the toothed plate (2-10), a magnetic piece two (2-6) is provided in the placement rack three (2-11), a slide groove (2-12) is provided in the housing (2-1), and the toothed plate (2-10) slides in the slide groove (2-12).

6. The hydraulic power caliper with a low-wear brake structure according to claim 5, characterized in that: The rear end of the tooth plate (2-10) is connected to a return spring (2-13), and the other end of the return spring (2-13) abuts against the inner wall of the housing (2-1).

7. The hydraulic power caliper with a low-wear brake structure according to claim 5, characterized in that: Gear 2 (2-14), gear 3 (2-15) and gear 4 (2-16) are also provided in the housing (2-1); gear 1 (2-9) meshes with gear 2 (2-14); gear 2 (2-14) and gear 3 (2-15) are coaxial; gear 3 (2-15) meshes with gear 4 (2-16); and gear 4 (2-16) meshes with the toothed plate (2-10).

8. The hydraulic power caliper with a low-wear brake structure according to claim 7, characterized in that: The number of teeth of the gear 1 (2-9) is greater than the number of teeth of the gear 2 (2-14), and the number of teeth of the gear 3 (2-15) is greater than the number of teeth of the gear 2 (2-14).

9. The hydraulic power caliper with a low-wear brake structure according to claim 1, characterized in that: A plurality of heat dissipation openings (2-17) are provided on the outward side of the shell (2-1).

10. The hydraulic power caliper with a low-wear brake structure according to claim 9, characterized in that: A plurality of heat sinks (2-18) are hingedly provided on the outer side of the brake band (2-2); the middle portion of the heat sink (2-18) is rotatably connected to the housing (2-1) via a rotating shaft; the other end of the heat sink (2-18) extends out of the heat dissipation port (2-17).

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