CN2343206Y

CN2343206Y - Anti-theft cover for manhole

Info

Publication number: CN2343206Y
Application number: CN 98244172
Authority: CN
Inventors: 刘建平; 刘建华; 陈德占
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-09-15
Filing date: 1998-09-15
Publication date: 1999-10-13
Anticipated expiration: 2008-09-15

Abstract

The utility model relates to an anti-theft cover for a manhole, comprising a manhole cover base, a manhole cover and a special key. The lower bottom surface of the manhole cover is fixed with an elastic plate, and the end of the elastic plate is longer than the seam of the manhole cover and the manhole cover base. When the cover plate is taken up, the special key is must be needed. Thus the possibility of stealing of the manhole cover by the lawless persons can be prevented, and the personal safety is protected.

Description

A kind of anti-stealing manhole cover

The utility model belongs to the sewer device therefor.

Known sewer well lid is to be added with well lid on manhole cover base, because well lid is the cast iron manufacturing, usually stolen by the unprincipled fellow, this has brought unsafe hidden danger for the people's life and vehicle, patent 91206185.5 discloses a kind of high-strength anti-theft well lid for this reason, this theft-proof type well lid is by built-in lock, walling crib, composition such as well lid and private key, its feature is that built-in lock is installed in below the well lid, and there have L type baffle plate to hide to be firmly latent, when opening, use built-in lock private key to open, this well lid can prevent to be stolen may, but, can make lock corrosion well lid be difficult for being opened because of the etch of water or dirty gas because its built-in lock is contained under the well lid.

The purpose of this utility model provides a kind of stolen anti-stealing manhole cover of easily opening well lid again that prevents.

The utility model is achieved through the following technical solutions, this anti-stealing manhole cover, comprise manhole cover base, well lid and private key, it is characterized in that: the bottom surface of well lid is fixed with elastic plate, the seam of well lid and manhole cover base is longer than in the termination of elastic plate, and has the through hole that can make the private key insertion on the corresponding up and down well lid of elastic plate.This anti-stealing manhole cover is owing to the bottom surface at well lid is fixed with the elastic plate that the seam of well lid and manhole cover base is longer than in the termination, therefore can't take well, lid away from cover plate top, played antitheft effect, withstand elastic plate downwards with private key in the through hole of private key insertion well lid, make its termination within seam, will be as easy as rolling off a log pick up well lid, therefore this anti-stealing manhole cover has the advantage of very easily picking up again for administrative staff.

Be described further below in conjunction with drawings and Examples.

Fig. 1 is the vertical view of embodiment 1;

Fig. 2 is the upward view of well lid among the embodiment 1;

Fig. 3 is a special-purpose key view among the embodiment 1;

Fig. 4 is for being equipped with the A-A '-A behind the private key among the embodiment 1 " sectional view;

Fig. 5 is the sectional view of embodiment 2;

Fig. 6 is the schematic diagram of special-purpose key among the embodiment 3.

Embodiment 1: be stamped well lid 2 on the manhole cover base 1, be fixed with three elastic plates 6 by fixture 5 on the bottom surface of well lid 2, its termination 6 ' is longer than manhole cover base 1 and is stitched M with the handing-over of well lid 2, elastic plate 6 exceeds on the last plane of the latch plate 6 outside the seam M and is fixed with projection 6 ', form by tapped sleeve 7 ' and the screw rod 7a that is assemblied in the sleeve with having on the corresponding well lid 2 of latch plate for private key 7, sleeve 7 ' front end is a polygon 7 ", wherein other any one orientation are longer than in the MN orientation.Screw rod 7a upper end is fixed with moving rod 7b, the shape of through hole 3 and private key 7 and sleeve 7 ' termination 7 " identical.

Generally private key 7 is by administrative staff keeping, by administrative staff private key 7 inserted in the through holes 3 to the backspin screw thread with the roof pressure elastic plate in the time of need opening well lid, then with sleeve well lid mentioned.

Embodiment 2: be fixed with a latch plate 6 in the present embodiment on the bottom surface of well lid 2, this latch plate 6 has two positioning grooves 6 "; screw 5 passes positioning groove 4 and latch plate 6 is fixed on the bottom surface of well lid 2; have the equidistant private key 7 insertable through holes 3 apart from the center of circle on the well lid 2 of latch plate 6 correspondences; the structure of private key 7 is identical with embodiment 1; its termination 7 ' shape is identical with through hole 3; the cross-stitch M of well lid 2 and manhole cover base 1 is longer than in two terminations 6 ' of latch plate 6, and other structures are identical with embodiment 1.

Embodiment 3: be equipped with a through hole in the present embodiment on the Zhuan Yong screw rod, the following circular arc tangential line FH in hole equals the length of sleeve to the distance of screw rod bottom Q, and lock 8 is housed in the hole.Other structures are identical with embodiment 1.

Special-purpose key also can adopt the top of hydraulic pressure to lose in the utility model, with downward roof pressure elastic plate.

Claims

1. anti-stealing manhole cover, comprise manhole cover base, well lid and private key, it is characterized in that: the bottom surface of well lid is fixed with elastic plate, and well lid and manhole cover base seam are longer than in the termination of elastic plate, and has the through hole that private key is inserted on the corresponding well lid of elastic plate.

2. anti-stealing manhole cover according to claim 1 is characterized in that: elastic plate exceeds on the last plane of the elastic plate face outside well lid and the manhole cover base seam and is fixed with projection 6a.

3. anti-stealing manhole cover according to claim 1 and 2, it is characterized in that: private key is by tapped sleeve and be assemblied in the sleeve screw mandrel and form, barrel forward end is a polygon, and the length in the rarest orientation is greater than the length in other orientation in this polygon.

4. anti-stealing manhole cover according to claim 1 and 2, it is characterized in that: it is top that private key has hydraulic pressure.

5. anti-stealing manhole cover according to claim 3, its special sex character is: be equipped with the hole on the screw rod of private key, the following circular arc tangential line in hole equals the length of sleeve to the distance of screw rod bottom, and lock is housed in the hole.