Clip type anti-stealing manhole cover

A manhole cover and card-type technology is applied in the field of card-type anti-theft manhole covers to achieve the effects of low manufacturing cost, firm fit and good protection.

Inactive Publication Date: 2009-06-24
HENAN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the patent bulletin, there are now hundreds of patent applications for inspection well protection covers with different structures that have been authorized in China, but there are very few that are actually populari

Method used

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  • Clip type anti-stealing manhole cover
  • Clip type anti-stealing manhole cover
  • Clip type anti-stealing manhole cover

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Such as figure 1 , 2 As shown, the clip-type anti-theft manhole cover includes the well cover (1), the claw shaft (2), the pin (3) and the cover seat (4), and the outer ring of the well cover (1) and the inner ring of the cover seat (4) are all circular , the bottom of the well cover (1) is provided with reinforcing ribs, and the surface of the cover has a number of non-slip bumps and process holes for assembly, disassembly and handling. On the central axis of the well cover (1), there are A hole with an internal thread, the claw shaft (2) is housed in the hole, and there is also a through hole on the inner side of the central axis of the cover seat (4) corresponding to the hole position of the well cover (1) on the left and right. This hole has no thread, The lower end face of the hole is an inverted conical face.

[0014] The claw shaft (2) is a cylindrical hollow shaft with a thread on the upper end of the outer diameter and a claw with an equal opening slot at the...

Embodiment 2

[0017] See image 3 , embodiment 2 is to modify the structure of the stepped inner hole of the claw shaft (2) and the outer diameter of the pin (3) slightly, process the matching internal and external threads, and change the threaded hole in the center of the top end of the pin (3) into a concave one For the triangular curve groove, use a special tool to rotate the pin (3) downwards, and the conical cylindrical surface at the end of it will push against the inner arc surface of the claw shaft (2) to expand it outwards, and the claw surface will expand It is fully clamped at the inverted conical end face of the cover seat (4). Since the inner arc surface of the claw is locked, the claw cannot bounce back by itself, which plays a role in preventing theft and dismantling.

[0018] All the other steps are the same as in Example 1.

[0019] This card-type anti-theft manhole cover has a simple structure, few parts, and low manufacturing cost. Especially, the interlocking of the man...

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PUM

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Abstract

The invention provides a jaw-locking-type theft-prevention inspection well lid, which comprises a well lid (1), a pawl axle (2), a pin (3) and a lid seat (4), both inner circle of the well lid (1) and the outer circle of the lid seat (4) are round, the positions close to the margins at the left and right sides of the central axis of the well lid (1) are respectively provided with a hole which is provided with an internal thread, the pawl axle (2) is arranged inside the hole, the left and right sides of the position which is close to the inner side of the central axis of the lid seat (4) and corresponds to the hole position of the well lid (1) are respectively provided with a through hole without a thread, the lower end surface of the hole is an inverted conical surface. After the well lid (1) is put into the inner circle of the lid seat (4), the jaws of the pawl axle (2) are pop out and are tightly locked on the conical surface at the lower end of the lid seat (4), the pin (3) in the pawl axle (2) can lock the jaws; the inspection well lid is simple in structure and low in manufacture cost, uses few components, the well lid and the lid seat are interlocked, therefore, the theft prevention effect is good, misplacement, overturn or falling are not caused, thus being applicable to various inspection wells.

Description

Technical field [0001] The invention relates to a card-type anti-theft inspection well cover, which belongs to a well cover device for hidden wells such as pipelines, ditches and lines. Background technique [0002] The various inspection shaft protective covers currently in use have different structures, functions and materials. However, the shape of the manhole cover has not changed. There are two commonly used types: round or with lugs. The circular manhole cover placed on the fast lane is very easy to break away from its original position with the momentum of the car, which brings great hidden dangers to vehicles and pedestrians. The unlocked inspection well cover is often stolen by thieves, and once the inspection well loses the protective well cover, it will become a trap immediately, bringing harm to vehicles and pedestrians. According to the patent bulletin, there are now hundreds of patent applications for inspection well protection covers with different structure...

Claims

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Application Information

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IPC IPC(8): E02D29/14
Inventor 郝杰锋买建军
Owner HENAN POLYTECHNIC UNIV
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