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CN-122008127-A - Locking tool for hydraulic oil pipe in narrow space and operation method

CN122008127ACN 122008127 ACN122008127 ACN 122008127ACN-122008127-A

Abstract

The embodiment of the application provides a narrow space hydraulic oil pipe locking tool which comprises a variable-diameter sleeve head, a universal torque transmission rod and a magnetic quick-change interface, wherein the sleeve head is provided with a plurality of clamping teeth capable of moving radially and used for adaptively clamping joints with different outer diameter sizes, the transmission rod is connected with the sleeve head through at least three hinged joints so as to transmit torque under a limited angle, and the interface is arranged between the transmission rod and the sleeve head and used for realizing quick disassembly and assembly between the transmission rod and the sleeve head and preventing unexpected falling. The locking tool converts the narrow space locking problem into three sub-problems of radial self-adaptive clamping, multi-degree-of-freedom torque transmission and instantaneous and reliable interface connection through the three-layer coupling principle of variable diameter, universal and quick change.

Inventors

  • GAO LIYONG
  • MA SHUO
  • YUAN ZHEN
  • MA CHANG
  • ZENG ZHAOLONG
  • Qian Manyi
  • LIU HE
  • Yun Leigang
  • WU ZHANGLI

Assignees

  • 首钢滦南马城矿业有限责任公司

Dates

Publication Date
20260512
Application Date
20260403

Claims (10)

  1. 1. A confined space hydraulic tubing locking tool comprising: the variable-diameter sleeve head is provided with a plurality of radially movable clamping teeth and is used for adaptively clamping joints with different outer diameter sizes; A universal torque transfer lever connected to the sleeve head by at least three articulation joints to transfer torque at a limited angle; the magnetic quick-change interface is arranged between the transmission rod and the sleeve head and is used for realizing quick disassembly and assembly between the transmission rod and the sleeve head and preventing accidental falling.
  2. 2. The locking tool of claim 1, wherein the variable diameter sleeve head comprises: a split petal claw structure; The clamping teeth are arranged on the inner sides of the petal claws and can slide along the radial direction under the action of the pre-tightening force of the springs so as to self-adaptively lock the joint within the range of phi 8 mm-phi 27 mm.
  3. 3. The locking tool of claim 1, wherein the universal torque transfer lever comprises: The deflection angle of each hinge joint is more than or equal to 70 degrees; And the cross universal joint and the planetary gear set are arranged in the transmission rod.
  4. 4. The locking tool of claim 1, wherein the magnetically attractable quick change interface comprises: A neodymium-iron-boron permanent magnet; The mechanical anti-falling lock catch is used for providing secondary insurance on the basis of magnetic attraction.
  5. 5. A locking tool as claimed in claim 1, wherein the engagement surface of the latch is provided with tungsten carbide particles and the latch tooth form angle is 55 ° ± 2 °.
  6. 6. A locking tool as claimed in claim 1, wherein the transfer rod surface is provided with a laser etched torque scale.
  7. 7. The locking tool of claim 1, wherein the locking tool further comprises: and the torque sensor module is detachably arranged on the transmission rod and used for monitoring and outputting torque data in real time.
  8. 8. A method for locking or unlocking a hydraulic fitting in a confined space using the locking tool of any one of claims 1 to 7, comprising the steps of: S1, connecting a variable-diameter sleeve head with a universal torque transmission rod through a magnetic quick-change interface; s2, inserting the sleeve head to a joint position along the axial direction of the oil pipe; S3, applying axial pressure to trigger the latch self-adaptive locking joint until the tactile feedback is more than or equal to 2kg; S4, the transmission rod is reciprocated and swung at a small angle with a single rotation angle more than or equal to 8 degrees, so that the fastening or the dismounting of the joint is realized.
  9. 9. The method according to claim 8, wherein in step S3, the latch is automatically locked when the axial pressure is not less than 5N to ensure that the latch does not come loose during the subsequent rotation.
  10. 10. The method according to claim 8, wherein in the step S4, the minimum operation space is 50mm×50mm×100mm, and the single fastening or detaching time is less than or equal to 8 seconds.

Description

Locking tool for hydraulic oil pipe in narrow space and operation method Technical Field The application relates to the technical field of hydraulic system maintenance tools, in particular to a locking tool for a hydraulic oil pipe in a narrow space and an operation method. Background In the daily maintenance of a hydraulic system, the problems of narrow space and dense pipelines exist in scenes such as a diaphragm pump, an equipment interlayer, a walking mechanical frame and the like. The conventional open-end or double offset ring spanner needs a turning radius of 120-mm, the practical operable angle is always smaller than 30 degrees, the complete force application is difficult, and the sleeve spanner cannot be pushed to the root of the joint along the oil pipe due to the large axial length. In-situ investigations have shown that about 63% of the hydraulic leakage results from joint loosening, which is mostly caused by insufficient installation torque or difficulty in secondary tightening. The sight is sheltered from in the narrow space, and the operator can't confirm the meshing situation of hexagonal joint and sleeve by eye, easily leads to "skidding" because of the edges and corners wearing and tearing, both damage sealed face and have high pressure oil to spray the risk. In addition, the torque transmission efficiency is low under the limited angle, the torque attenuation can reach more than 25% during manual tightening, and the torque requirement of the ISO 8434 standard on the high-pressure pipe joint is difficult to meet. The existing universal joint or flexible shaft scheme can change the force application direction, but has loose structure and large return difference, cannot accurately control torque, does not have a quick replacement function, and has low maintenance efficiency and long operation period. Therefore, there is a strong need for a hydraulic tubing locking tool that is capable of achieving efficient, safe, re-tightenable within a 50 mm stage clearance. Disclosure of Invention The application provides a locking tool and an operation method for a hydraulic oil pipe in a narrow space, which aim to solve the technical problem of how to realize efficient and reliable locking of an oil pipe joint in the narrow space. In a first aspect, an embodiment of the present application provides a hydraulic tubing locking tool for a confined space, including: the variable-diameter sleeve head is provided with a plurality of radially movable clamping teeth and is used for adaptively clamping joints with different outer diameter sizes; A universal torque transfer lever connected to the sleeve head by at least three articulation joints to transfer torque at a limited angle; the magnetic quick-change interface is arranged between the transmission rod and the sleeve head and is used for realizing quick disassembly and assembly between the transmission rod and the sleeve head and preventing accidental falling. Optionally, the variable diameter sleeve head comprises: a split petal claw structure; The clamping teeth are arranged on the inner sides of the petal claws and can slide along the radial direction under the action of the pre-tightening force of the springs so as to self-adaptively lock the joint within the range of phi 8 mm-phi 27 mm. Optionally, the universal torque transmission lever includes: The deflection angle of each hinge joint is more than or equal to 70 degrees; And the cross universal joint and the planetary gear set are arranged in the transmission rod. Optionally, the magnetic quick-change interface includes: A neodymium-iron-boron permanent magnet; The mechanical anti-falling lock catch is used for providing secondary insurance on the basis of magnetic attraction. Optionally, the occlusal surface of the latch is provided with tungsten carbide particles, and the tooth shape angle of the latch is 55 degrees plus or minus 2 degrees. Optionally, the surface of the transmission rod is provided with a torque scale etched by laser. Optionally, the locking tool further includes: and the torque sensor module is detachably arranged on the transmission rod and used for monitoring and outputting torque data in real time. In a second aspect, an embodiment of the present application provides a method for locking or disassembling a hydraulic oil pipe joint in a narrow space by using the locking tool according to any one of the first aspects, which is characterized by comprising the steps of: S1, connecting a variable-diameter sleeve head with a universal torque transmission rod through a magnetic quick-change interface; s2, inserting the sleeve head to a joint position along the axial direction of the oil pipe; S3, applying axial pressure to trigger the latch self-adaptive locking joint until the tactile feedback is more than or equal to 2kg; S4, the transmission rod is reciprocated and swung at a small angle with a single rotation angle more than or equal to 8 degrees, so that the fastening or the d