Six-arm roller centering device

A roller and six-arm technology, applied in the field of six-arm roller centering device, can solve the problems of high maintenance cost, poor centering effect of spring sheets, large eccentric moment, etc., and achieve the effect of strong bearing capacity, small additional load and small eccentric moment

Inactive Publication Date: 2015-07-01
巩宪锋
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing centering devices include a spring leaf and an eight-arm roller centralizer. Among them, the spring leaf has a poor centering effect, is easy to break, has high maintenance costs, and cannot adapt to a wide range of pipe diameters; although the eight-arm roller centralizer has a better centering effect, it is also It can adapt to a wide range of pipe diameters, but the structure is complicated, the installation is inconvenient, and there is a large eccentric moment, and the key parts are easy to break during operation

Method used

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  • Six-arm roller centering device
  • Six-arm roller centering device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Example 1 as figure 1 As shown, the six-arm roller centering device includes a central shaft 1, and the two ends of the central shaft 1 are connected with the left connecting seat 2 and the right connecting seat 3 through threads, and the left connecting seat 2 and the right connecting seat 3 have internal and external threads respectively, for Connect other devices of the pipeline robot, the inner side of the connecting seat is symmetrically arranged with the arm seat 4, the arm seat 4 has a built-in rectangular spring 5, the two ends of the rectangular spring 5 are the end cover 6 and the push rod seat 7, and the side of the push rod seat 7 presses the sleeve 8 , the sleeve 8 is set on the central shaft 1, and passes through the arm seat 4. The support arm 9 is hinged on the sleeve 7. The end of the support arm 9 connected to the sleeve 8 has a waist-shaped hole, and the waist-shaped hole is fixed on the sleeve. The fixed pin 13 on 8 limits the rotation range of the s...

Embodiment 2

[0011] Example 2 as figure 2 As shown, the push rod on the push rod base 7 pushes the support arm 9 and rotates around the hinge of the sleeve 8. The three form a lever mechanism, and the hinge of the support arm 9 and the sleeve 8 is the lever fulcrum. A small amount of displacement of the push rod seat 7 is amplified by the lever mechanism, resulting in a large radial displacement of the support arm 9. Since the displacement of the push rod seat 7 is small during the operation, the return force of the rectangular spring 5 changes very little, and the centering force of the centering device Almost constant, so this six-arm roller centering device can accommodate a wide range of pipe diameters.

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PUM

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Abstract

A six-arm roller centering device is applied to the field of pipeline robots and is characterized in that a left connection seat (2) and a right connection seat (3) are in threaded connection with two ends of a center shaft (1) respectively, and arm seats (4) are symmetrically arranged on the inner sides of the connection seats. A rectangular spring (5) is arranged in each arm seat (4), an end cover (6) and a push rod seat (7) are arranged at two ends of each rectangular spring (5) respectively, one side of each push rod seat (7) tightly presses a prism sleeve (8) which penetrates through the corresponding arm seat (4), left and right supporting arms (9) are hinged onto each sleeve (8), rollers (10) are mounted on the supporting arms (9) through first screws (11), three push rods on each push rod seat (7) contact with three supporting arms (9), and each arm seat (4) and the corresponding end cover (6) are fixed onto the central shaft (1) through a second screw (12). The six-arm roller centering device has the advantages of effectiveness in centering, simple structure, convenience in mounting and wide pipe diameter application range.

Description

technical field [0001] The invention relates to a centering device used by a pipeline robot, in particular to a six-arm roller centering device. Background technique [0002] When the pipeline robot walks in the pipeline, in order to reduce the friction, it is necessary to connect the centering device at both ends, such as the casing traction robot in the oil field to install the centering device. The existing centering devices include a spring leaf and an eight-arm roller centralizer. Among them, the spring leaf has a poor centering effect, is easy to break, has high maintenance costs, and cannot adapt to a wide range of pipe diameters; although the eight-arm roller centralizer has a better centering effect, it also It can adapt to a wide range of pipe diameters, but the structure is complex, installation is inconvenient, and there is a large eccentric moment, and the key parts are easy to break during operation. Contents of the invention [0003] In order to overcome th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L55/40
CPCF16L55/40
Inventor 巩宪锋朱勇陈桂梅张伟波
Owner 巩宪锋
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