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Clip type anti-stealing manhole cover

A technology of manhole cover and manhole cover, which is applied in water conservancy projects, artificial islands, underwater structures, etc., achieves the effects of simple structure, few parts and low manufacturing cost

Inactive Publication Date: 2010-08-11
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 popularized and used in the market, simple in structure, safe and anti-theft, and easy to manufacture and promote. Therefore, Proposing and designing a new structure of inspection well protection cover has positive practical significance

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

[0012] As shown in Figures 1 and 2, the clip-type anti-theft inspection well cover includes the well cover (1), the claw shaft (2), the pin (3) and the cover seat (4), the outer ring of the well cover (1) and the inner ring of the cover seat (4) They are all round, and 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 and disassembly. Each edge has a hole with internal thread, and the claw shaft (2) is housed in the hole, and there is also a through hole on the left and right at the inner side of the central axis of the cover seat (4) corresponding to the hole position of the well cover (1). The hole is not threaded and the lower face of the hole is an inverted conical face.

[0013] 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 lower end. The claw is elastic, and the nu...

Embodiment 2

[0016] See Fig. 3, embodiment 2 is to slightly modify the structure of the stepped inner hole of the claw shaft (2) and the outer diameter of the pin (3), process the matching internal and external threads, and change the threaded hole at the center of the top end of the pin (3) into In the concave triangular curve groove, use a special tool to rotate the pin (3) downward, and the conical cylindrical surface at the end of the pin will push against the inner arc surface of the claw shaft (2) to expand it outward, and the pin will be locked after expansion. Claw claw surface is firmly stuck on the inverted conical end face place of cover seat (4), because the claw inner arc surface is blocked, the claw can not bounce back by itself, plays the role of anti-theft dismantling.

[0017] All the other steps are the same as in Example 1.

[0018] This card-type anti-theft manhole cover has a simple structure, few parts, and low manufacturing cost. Especially, the interlocking of the m...

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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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Patent Type & Authority Patents(China)
IPC IPC(8): E02D29/14
Inventor 郝杰锋买建军
Owner HENAN POLYTECHNIC UNIV
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