Safety locking device for hydraulic power tongs
By designing a hydraulic power clamp safety locking device, the locking frame is used to limit the rotation of the hydraulic valve joystick by limiting the rotation of the hydraulic valve joystick, the accidental start-up problem that may be caused when the safety door is opened in the non-working state is solved, and the effect of safe locking and preventing personal injury is achieved.
Patent Information
- Application Number
- CN202421897083.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-07
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-08-07
AI Technical Summary
When the hydraulic power clamp is in a non-working state and the safety door is opened, if someone reaches into the jaw, the accidental start of the hydraulic valve joystick may cause personal injury.
A hydraulic power clamp safety locking device is designed, including a wire rope, a branch shaft, a mounting frame, a locking frame, a torsion spring and a limiting plate. The horizontal plate part of the locking frame is placed outside the branch shaft to limit the rotation of the hydraulic valve joystick and achieve safe locking.
It effectively avoids accidental start of the hydraulic valve joystick under external force, ensures the safety of the hydraulic power clamp in the non-working state, prevents personal injury, and prevents the oil circuit from establishing a circulation.
Smart Images
Figure CN222991469U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of hydraulic power tongs equipment, and particularly relates to a safety locking device for a hydraulic power tong. Background Art
[0002] At the oil well workover construction site, a hydraulic power tong is the most commonly used construction equipment. When in use, it generally rotates by pulling the hydraulic valve operating lever of the hydraulic power tong. The hydraulic valve operating lever drives the hydraulic valve reversing shaft connected thereto to act, thereby switching the hydraulic oil circuit of the hydraulic power tong to realize the start and stop of the hydraulic power tong. The hydraulic valve operating lever is arranged on the operating lever mounting seat, and the operating lever mounting seat is generally arranged on the hydraulic valve block of the hydraulic power tong, and the hydraulic valve reversing shaft is used in cooperation with the hydraulic valve block.
[0003] At present, a safety door is generally provided at the opening of the tong body of the hydraulic power tong. During normal operation, the safety door is generally in a closed state to play a protective role. However, when the hydraulic power tong should be in a non-operating state and the safety door is in an open state, if someone puts their hand into the tong mouth at this time and the hydraulic valve operating lever is accidentally driven by an external force to drive the hydraulic valve reversing shaft to start the hydraulic power tong, it will cause serious harm to people. Content of the Utility Model
[0004] Aiming at the above problems, the purpose of the utility model is to provide a safety locking device for a hydraulic power tong.
[0005] The purpose of the utility model is realized by the following technical solutions:
[0006] A safety locking device for a hydraulic power tong, comprising a steel wire rope, a branch shaft, a mounting frame, a locking frame, a torsion spring, and a limiting plate;
[0007] The branch shaft is connected to the hydraulic valve operating lever of the hydraulic power tong, and the axial center line of the branch shaft is perpendicular to the axial center line of the hydraulic valve reversing shaft and parallel to the rotation axis of the hydraulic valve operating lever;
[0008] The mounting bracket and the limiting plate are respectively arranged on the operating rod mounting seat of the hydraulic power tongs, and the mounting bracket and the limiting plate are respectively located on both sides of the branch shaft. An articulated seat is convexly provided on the mounting bracket. The locking bracket is L-shaped and is divided into a vertical plate portion and a horizontal plate portion connected together. An articulated ear is convexly provided at the junction of the horizontal plate portion and the vertical plate portion of the locking bracket. The articulated ear of the locking bracket is articulated with the articulated seat of the mounting bracket through a rotating shaft. The torsion spring is sleeved on the rotating shaft. One end of the torsion spring is connected to the mounting bracket, and the other end of the torsion spring is connected to the side surface of the vertical plate portion of the locking bracket away from the limiting plate. A limiting long hole for the branch shaft to pass through and for limiting the branch shaft is provided on the horizontal plate portion of the locking bracket. A limiting groove for cooperating with the horizontal plate portion of the locking bracket is provided at the top of the limiting plate;
[0009] One end of the steel wire rope is connected to the end of the vertical plate portion of the locking bracket away from the rotating shaft, and the other end of the steel wire rope is connected to the safety door of the hydraulic power tongs and is driven by the safety door; when the safety door is in the closed state, the steel wire rope pulls the vertical plate portion of the locking bracket and the torsion spring is compressed, and the horizontal plate portion of the locking bracket leaves the position where the branch shaft and the limiting plate are located; when the safety door is in the open state, the steel wire rope is relaxed and the elastic force of the torsion spring acts on the vertical plate portion of the locking bracket. At this time, the horizontal plate portion of the locking bracket is sleeved on the outside of the branch shaft and limits the branch shaft, and the end of the horizontal plate portion of the locking bracket away from the rotating shaft is embedded in the limiting groove.
[0010] A pulley mounting seat is provided on one side of the mounting bracket away from the limiting plate, and a pulley for the steel wire rope to bypass is mounted on the pulley mounting seat.
[0011] A baffle mounting seat is provided on the horizontal plate portion of the locking bracket. The baffle mounting seat is located on the side away from the hydraulic valve block of the hydraulic power tongs. A baffle is connected to the side surface of the baffle mounting seat close to the limiting long hole through a plurality of springs. The baffle abuts against the branch shaft when the horizontal plate portion of the locking bracket is sleeved on the outside of the branch shaft.
[0012] The length direction of the limiting long hole, the length direction of the baffle mounting seat, and the length direction of the baffle are all parallel to the length direction of the horizontal plate portion of the locking bracket.
[0013] The lower part of the side surface of the baffle for abutting against the branch shaft forms an inclined surface portion that gradually inclines from top to bottom towards the direction where the baffle mounting seat is located.
[0014] The advantages and positive effects of the present utility model are:
[0015] When the safety door of the hydraulic power tong is in the open state, the horizontal plate part of the locking frame can be sleeved outside the branch shaft of the present utility model, so as to restrict the rotation of the hydraulic valve operating rod, achieve the safety locking effect of the hydraulic power tong, and effectively prevent the hydraulic valve operating rod from pulling the branch shaft and the locking frame to rotate together under a large external force, stably keep the locking frame from shaking, and ensure that the oil circuit of the hydraulic power tong does not establish a cycle. The structure is simple and reliable, and it is convenient for replacement and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 FIG. 1 is one of the schematic diagrams of the use state of the present utility model;
[0017] Figure 2 FIG. 2 is another schematic diagram of the use state of the present utility model;
[0018] Figure 3 FIG. 3 is a schematic diagram of the installation positions of the baffle mounting seat, spring and baffle of the present utility model.
[0019] In the figures: 1 is a wire rope, 2 is a branch shaft, 3 is a mounting frame, 301 is a hinge seat, 302 is a pulley mounting seat, 4 is a locking frame, 401 is a vertical plate part, 402 is a horizontal plate part, 4021 is a limit long hole, 403 is a hinge ear, 5 is a torsion spring, 6 is a limit plate, 601 is a limit groove, 7 is a rotating shaft, 8 is a pulley, 9 is a baffle mounting seat, 10 is a spring, 11 is a baffle;
[0020] 001 is a lever mounting seat, 002 is a hydraulic valve operating rod, 003 is a hydraulic valve reversing shaft. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0021] The following further details the present utility model in conjunction with the attached Figures 1-3 drawings.
[0022] A safety locking device for a hydraulic power tong, as Figures 1-3 shown, in this embodiment, it includes a wire rope 1, a branch shaft 2, a mounting frame 3, a locking frame 4, a torsion spring 5, and a limit plate 6.
[0023] The branch shaft 2 is connected to the hydraulic valve operating rod 002 of the hydraulic power tong, and the connection structure adopts the prior art; the axial center line of the branch shaft 2 is perpendicular to the axial center line of the hydraulic valve reversing shaft 003 and parallel to the rotation axis of the hydraulic valve operating rod 002.
[0024] The mounting bracket 3 and the limiting plate 6 are respectively arranged on the control lever mounting seat 001 of the hydraulic power tongs by screws, and the mounting bracket 3 and the limiting plate 6 are respectively located on both sides of the branch shaft 2, which is convenient for disassembly and assembly. An articulated seat 301 protrudes from the mounting bracket 3. The locking bracket 4 is L-shaped and is divided into a vertically connected plate portion 401 and a horizontally connected plate portion 402. An articulated ear 403 protrudes from the connection between the horizontally connected plate portion 402 and the vertically connected plate portion 401 of the locking bracket 4. The articulated ear 403 of the locking bracket 4 is articulated with the articulated seat 301 of the mounting bracket 3 through a rotating shaft 7, so that the locking bracket 4 can rotate relative to the mounting bracket 3. A torsion spring 5 is sleeved on the rotating shaft 7. One end of the torsion spring 5 is connected to the mounting bracket 3, and the other end of the torsion spring 5 is connected to the side surface of the vertically connected plate portion 401 of the locking bracket 4 away from the limiting plate 6. When the torsion spring 5 is not compressed, a force is generated on the vertically connected plate portion 401 of the locking bracket 4, causing the locking bracket 4 to rotate as a whole, and the horizontally connected plate portion 402 of the locking bracket 4 rotates to the position where the branch shaft 2 is located. A limiting long hole 4021 for the branch shaft 2 to pass through and for limiting the branch shaft 2 is provided on the horizontally connected plate portion 402 of the locking bracket 4, and a limiting groove 601 for cooperating with the horizontally connected plate portion 402 of the locking bracket 4 is provided at the top of the limiting plate 6.
[0025] One end of the steel wire rope 1 is connected to the end of the vertically connected plate portion 401 of the locking bracket 4 away from the rotating shaft 7. The other end of the steel wire rope 1 is connected to the safety door of the hydraulic power tongs and is driven by the safety door. The connection and fixing structure between the other end of the steel wire rope 1 and the safety door adopts the prior art. When the safety door is in the closed state, the steel wire rope 1 pulls the vertically connected plate portion 401 of the locking bracket 4 and the torsion spring 5 is compressed. The horizontally connected plate portion 402 of the locking bracket 4 leaves the position where the branch shaft 2 and the limiting plate 6 are located. At this time, the hydraulic valve control lever 002 of the hydraulic power tongs can be normally pulled to rotate, and the hydraulic power tongs can be normally started and stopped. When the safety door is in the open state, the steel wire rope 1 is relaxed and the elastic force of the torsion spring 5 acts on the vertically connected plate portion 401 of the locking bracket 4, causing the locking bracket 4 to rotate relative to the mounting bracket 3. The horizontally connected plate portion 402 of the locking bracket 4 is sleeved outside the branch shaft 2 at this time and limits the branch shaft 2, so as to restrict the rotation of the hydraulic valve control lever 002 and achieve the safety locking effect of the hydraulic power tongs. And at this time, the end of the horizontally connected plate portion 402 of the locking bracket 4 away from the rotating shaft 7 is embedded in the limiting groove 601, which can effectively prevent the hydraulic valve control lever 002 from pulling the branch shaft 2 and the locking bracket 4 to rotate together under a large external force, stably keep the locking bracket 4 from shaking, and ensure that the oil circuit does not establish a cycle.
[0026] Specifically, in this embodiment, a pulley mounting seat 302 is provided on the side of the mounting bracket 3 away from the limiting plate 6. A pulley 8 around which the steel wire rope 1 passes is mounted on the pulley mounting seat 302, which can play a guiding role for the steel wire rope 1.
[0027] Specifically, as Figure 2 and Figure 3As shown in the figure, in this embodiment, a baffle mounting seat 9 is provided on the horizontal plate portion 402 of the locking frame 4 by screws or welding. The baffle mounting seat 9 is located on the side away from the hydraulic valve block of the hydraulic power tong. On the side surface of the baffle mounting seat 9 close to the limit long hole 4021, a baffle 11 is connected by a plurality of springs 10. When the horizontal plate portion 402 of the locking frame 4 is sleeved outside the branch shaft 2, the baffle 11 abuts against the branch shaft 2. The length direction of the limit long hole 4021, the length direction of the baffle mounting seat 9, and the length direction of the baffle 11 are all parallel to the length direction of the horizontal plate portion 402 of the locking frame 4. When the horizontal plate portion 402 of the locking frame 4 is sleeved outside the branch shaft 2, the baffle 11 can abut against the outer peripheral surface of the branch shaft 2 under the action of the spring 10 and generate a force on the branch shaft 2 in the direction close to the hydraulic valve block of the hydraulic power tong (in this embodiment, it is Figure 2 the right side direction), to avoid the hidden danger that the hydraulic valve operating rod 002 makes a slight movement and causes the hydraulic valve reversing shaft 003 to make a slight movement when there is a large gap between the branch shaft 2 and the limit long hole 4021, thereby causing a slight opening of the oil circuit that should be closed and resulting in a slight movement of the hydraulic power tong, and further ensuring the reliability of locking. The lower part of the side surface of the baffle 11 for abutting against the branch shaft 2 forms an inclined surface portion that gradually inclines from top to bottom towards the direction where the baffle mounting seat 9 is located, which is convenient for the baffle 11 to effectively contact the branch shaft 2 and then effectively abut against the outer peripheral surface of the branch shaft 2 when the horizontal plate portion 402 of the locking frame 4 rotates and falls, to avoid jamming between the baffle 11 and the branch shaft 2.
Claims
1. A safety locking device for hydraulic power tongs, characterized in that: It comprises a steel wire rope (1), a branch shaft (2), a mounting frame (3), a locking frame (4), a torsion spring (5), and a limiting plate (6); The branch shaft (2) is connected to the hydraulic valve operating rod (002) of the hydraulic power tongs, and the axial center line of the branch shaft (2) is perpendicular to the axial center line of the hydraulic valve reversing shaft (003) and parallel to the rotation axis of the hydraulic valve operating rod (002); The mounting frame (3) and the limiting plate (6) are respectively arranged on the joystick mounting seat (001) of the hydraulic power tongs, and the mounting frame (3) and the limiting plate (6) are respectively located on both sides of the branch shaft (2). A hinge seat (301) is convexly provided on the mounting frame (3). The locking frame (4) is L-shaped and is divided into a vertical plate portion (401) and a horizontal plate portion (402) connected together. A hinge ear (403) is convexly provided at the junction of the horizontal plate portion (402) and the vertical plate portion (401) of the locking frame (4). The hinge ear (403) of the locking frame (4) is connected to the mounting frame (3) through a rotating shaft (7). The torsion spring (5) is hingedly connected to the hinge seat (301), the torsion spring (5) is sleeved on the rotating shaft (7), one end of the torsion spring (5) is connected to the mounting frame (3), and the other end of the torsion spring (5) is connected to a side surface of the vertical plate portion (401) of the locking frame (4) away from the limiting plate (6), and a limiting long hole (4021) for the branch shaft (2) to pass through and for limiting the branch shaft (2) is provided on the horizontal plate portion (402) of the locking frame (4), and a limiting groove (601) is provided on the top of the limiting plate (6) for use with the horizontal plate portion (402) of the locking frame (4); One end of the steel wire rope (1) is connected to an end of the vertical plate portion (401) of the locking frame (4) away from the rotating shaft (7), and the other end of the steel wire rope (1) is connected to the safety door of the hydraulic power tongs and driven by the safety door; when the safety door is in a closed state, the steel wire rope (1) pulls the vertical plate portion (401) of the locking frame (4) and the torsion spring (5) is compressed, and the horizontal plate portion (402) of the locking frame (4) leaves the branch shaft (2). and the position where the limiting plate (6) is located; when the safety door is in the open state, the steel wire rope (1) is relaxed and the elastic force of the torsion spring (5) acts on the vertical plate portion (401) of the locking frame (4), and the horizontal plate portion (402) of the locking frame (4) is now sleeved on the outer side of the branch shaft (2) and limits the branch shaft (2), and the end of the horizontal plate portion (402) of the locking frame (4) away from the rotating shaft (7) is embedded in the limiting groove (601).
2. A safety locking device for hydraulic power tongs according to claim 1, characterized in that: A pulley mounting seat (302) is provided on the side of the mounting frame (3) away from the limiting plate (6), and a pulley (8) for the steel wire rope (1) to pass around is installed on the pulley mounting seat (302).
3. A safety locking device for hydraulic power tongs according to claim 1, characterized in that: A baffle mounting seat (9) is provided on the horizontal plate portion (402) of the locking frame (4), and the baffle mounting seat (9) is located on a side of the hydraulic valve block away from the hydraulic power tongs. A baffle (11) is connected to the baffle mounting seat (9) on one side surface close to the limiting long hole (4021) through a plurality of springs (10), and the baffle (11) abuts against the branch shaft (2) when the horizontal plate portion (402) of the locking frame (4) is sleeved on the outside of the branch shaft (2).
4. A safety locking device for hydraulic power tongs according to claim 3, characterized in that: The length direction of the limiting long hole (4021), the length direction of the baffle mounting seat (9), and the length direction of the baffle (11) are all parallel to the length direction of the horizontal plate portion (402) of the locking frame (4).
5. A safety locking device for hydraulic power tongs according to claim 3, characterized in that: The lower part of a side surface of the baffle (11) used for contacting the branch shaft (2) forms an inclined surface portion which gradually inclines from top to bottom toward the direction where the baffle mounting seat (9) is located.