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Manhole cover blind hole lift

A technology for manhole covers and blind holes, which is applied in the field of lifting devices for blind holes of manhole covers, can solve problems such as dust, cigarette butts entering, underground engineering maintenance troubles, fork heels stuck in, etc., to achieve convenient procurement and high service life , to avoid the effect of slipping

Inactive Publication Date: 2015-05-20
TUS DESIGN GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, because a round hole is opened on the inspection shaft cover plate to lead directly to the inspection shaft passage opening, the edge of the hole is often broken, and the fork-type heel is stuck, causing disputes.
In addition, the round hole is open upward all the year round, and a lot of dust, cigarette butts and other sundries enter the inspection well mouth, causing a lot of trouble for the maintenance of underground engineering

Method used

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  • Manhole cover blind hole lift
  • Manhole cover blind hole lift
  • Manhole cover blind hole lift

Examples

Experimental program
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Embodiment

[0029] Example: Figure 1 ~ Figure 4 It is a structural schematic diagram of a blind hole lifting device for a manhole cover. The lifting device includes four back bolt holes 2 with a diameter of 13mm opened on the upper surface of the manhole cover plate 1, and these four back bolt holes 2 are distributed in a rectangular shape. An internally threaded blind hole anchor bolt 3 with an M8 threaded hole 32 is anchored in the back bolt hole 2, and the blind hole anchor bolt 3 described in this example is through The steel cylinder 5 is anchored in the back bolt hole 2. An M8*9 hexagon socket set screw 4 is threaded in the M8 threaded hole of the blind hole anchor bolt 3 . The hexagon socket set screw 4 is used to protect the thread of the M8 threaded hole.

[0030] It should be noted that the diameter of the back bolt hole 2, the size of the threaded hole 32 in the blind anchor bolt 3, the size of the hexagon socket set screw 4, and the number of the back bolt holes 2 can be s...

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Abstract

The invention discloses a manhole cover blind hole lift comprising at least two back-bolt holes arranged in the upper surface of a manhole cover plate. A blind hole bolt with a threaded hole is anchored in each back-bolt hole. An internal hex fastening screw is connected into the threaded hole of each blind hole bolt. The manhole cover blind hole lift is ingenious in structure and simple to manufacture, little structural damage is caused to a granite manhole cover, and foreign matters are avoided entering a wellhead of a manhole.

Description

technical field [0001] The invention relates to a blind hole lifting device for a manhole cover. Background technique [0002] With the development of social economy, people's requirements for public buildings and square construction have also increased, and the floor paved with granite has become more and more popular. There are many underground pipelines and manholes in engineering construction, and these manholes often appear in more important landscape parts, so for the landscape effect, various manhole covers just appear thereupon. Because the underground project needs to be overhauled, there is a requirement for opening the inspection shaft cover. Normally, a few round holes are opened on the inspection shaft cover plate, and a customized steel hook is used to lift the inspection shaft cover to complete the opening of the inspection shaft cover. [0003] Yet, because there is a circular hole on the inspection shaft cover plate to lead directly to the inspection shaft ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D29/14
CPCE02D29/1418
Inventor 王加伟
Owner TUS DESIGN GRP CO LTD
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