A circle centering tool

A technology of setting the center of a circle and drawing a circle, which is applied to roads, road repairs, roads, etc., can solve problems such as damage and cracking, cutting circles and shafts not concentric, and achieve high accuracy, small deviation, and convenient use

Active Publication Date: 2017-06-23
SHANDONG HUITONG CONSTR GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of early failure and cracking caused by the inconcentricity of the cutting circle and the wellbore, the present invention provides a circle centering tool

Method used

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Embodiment 1

[0018] Such as figure 1 , figure 2 As shown, a tool for setting the center of a circle and drawing a circle includes a vertical rod 1, and also includes a conical platform 9 for determining the center of the wellbore and for carrying the vertical rod 1. The diameter of the top surface of the conical platform 9 is larger than the diameter of the wellbore 30-50mm, the diameter of the bottom surface of the conical platform 9 is 30-50mm smaller than the diameter of the shaft; the center of the conical platform 9 is provided with a vertical rod socket 10, which is the same The shaft is set; the bottom of the vertical rod 1 is detachably connected with the vertical rod bearing socket 10.

[0019] The vertical rod 1 is sleeved with a height adjustment ring 8 that can move up and down along the vertical rod 1. The height adjustment ring 8 is fixedly connected with the inner ring of the bearing 7; The shaft is hingedly connected with the connecting block 3; the telescopic rod 4 is p...

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Abstract

The invention discloses a circle centering tool for drawing circles, which belongs to the field of municipal construction tools. The invention comprises a vertical rod, on which a height adjustment ring capable of moving up and down along the vertical rod is sleeved, and the height adjustment ring is fixedly connected with the inner ring of the bearing; a connection block is fixedly arranged on the outer wall of the bearing outer ring, and the connection block is hingedly connected with the telescopic rod , the telescopic rod is perpendicular to the vertical rod; the telescopic rod is sleeved with a marking pen capable of moving left and right along the telescopic rod. Firstly, place the truncated conical carrier on the hole of the cover plate. The truncated circular carrier will not fall when it is located in the hole of the cover plate, and the outer wall of the truncated circular carrier is closely attached to the well wall. The vertical rod is inserted into the vertical rod bearing socket, and the vertical rod bearing socket is coaxially arranged with the conical platform; therefore, the center of the vertical rod bearing socket is the center of the shaft. According to the construction situation, adjust the height of the nib of the engraving pen by adjusting the height adjustment ring; according to the construction situation, adjust the length of the telescopic rod, and use the engraving pen to draw a circle. Construction personnel can cut and reinforce the construction area according to the drawn area.

Description

technical field [0001] The invention relates to the field of municipal construction tools, in particular to a center-fixing and circle-drawing tool used in the reinforcement process of inspection wells. Background technique [0002] In the process of strengthening and installing municipal road inspection wells, in order to make the surrounding reinforcement range of the manhole cover consistent, the edges smooth, improve the edge force, and improve the durability of use, the design requires that the manhole cover reinforcement area must be cut to be a perfect circle concentric with the wellbore. [0003] In the actual construction process, workers draw circles by hand. Limited by the technical level of workers, the circle deviation after cutting is relatively large, and it is very easy to have the phenomenon that the two centers of the circles are not concentric. The reinforcement strength of the edge of the manhole cover is inconsistent, which is easy to cause early damage a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01C23/01
Inventor 冯化新刘林坤付同华杨玲玲陈永慧
Owner SHANDONG HUITONG CONSTR GRP CO LTD
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