CN2201424Y

CN2201424Y - Anti-theft well cover and its open tool

Info

Publication number: CN2201424Y
Application number: CN 94236565
Authority: CN
Inventors: 文灿铭
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-05-26
Filing date: 1994-05-26
Publication date: 1995-06-21
Anticipated expiration: 2004-05-26

Abstract

The utility model discloses an anti-theft well cover and a special opening tool for the anti-theft well cover. The anti-theft well cover is composed of a well cover and a well ring, wherein the front side of the well cover is provided with more than two cover opening grooves; a hook mechanism and a rotation prevention structure which are matched with each other are arranged between the well ring and the well cover; the special tool is needed to open the well cover. In the practical design, the positions of the cover opening grooves can be changed irregularly and geometrically, and thus the anti-theft performance of the utility model is enhanced. The utility model has the advantages that the structure is artful; compared with the existing well covers, the utility model has the same manufacturing process and cost.

Description

Anti-theft well cover and its open tool

The utility model belongs to the underground pipeline manufacturing field of equipment.

Use in the urban Underground pipeline (sewer, running water pipe, gas flue, underground cable etc.) at present for administrative department's maintenance or dredging the time outlet---the inspection shaft opened, owing to lack necessary theft-prevention structure, the lawless person is easy to use simple tools to start with from the jack or the edge breach of well lid, well lid taken off steal, this situation takes place repeatedly in many big townlet, seriously influence industrial or agricultural construction and traffic safety, become a headachy problem in the urban construction.

The purpose of this utility model is, antitheft structure is set in the design of inspection shaft mouth, increase self anti-theft capability of well lid, make well lid only can use special special tool (only administrative department holds) to open, in design, do not increase production difficulty and cost of production as far as possible, try hard to close with the traditional product production technology.

The purpose of this utility model is that also tool is opened in the special use of supporting design anti-stealing manhole mouth, in design, takes into account general with special-purpose demand contradictory, has both increased the difficulty of burglar's theft, makes instrument keep certain versatility again.

The purpose of this utility model is to realize by following means.

In the inspection shaft mouth of forming by well lid and walling crib etc., plural opening groove is set on the front with well lid, be equipped with the hitch gear that matches on the back side of well lid and the walling crib, the back side of well lid also is equipped with walling crib ends the only spin-block that spin slot matches, and the height that should end spin-block is less than the headway between hook.

When well lid of the present utility model is opened by management and maintenance department, use special use to open tool, this opens tool and has plural opening pawl, and this opening pawl is connected in the screw mandrel position of vertical rod by linkage, one pressing plate is enclosed within the presenting a theatrical performance as the last item on a programme of vertical rod, and this pressing plate has and the suitable chute of opening pawl.

After design as above, the utility model well lid has only the utility model of use special opening tool just can open.During unlatching, the cross bar of first turn special tool makes the opening pawl fall into the opening groove, and pressing plate pins the opening pawl and makes it to keep the tight opening groove of pincers.Carry cross bar then, the pawl head is mentioned well lid gently, makes the spin-block that ends on the well lid propose to end on the spin slot, and then horizontally rotates cross bar, and the pawl head drives well lid and horizontally rotates, and lower draw-bar is separated from each other, and will carry on the cross bar at last, and well lid is taken off.The process of installation well lid in contrast.

Such operating process: pincers are tight-on carry-turn-on carry, be generally hold light instrument steal the person can not finish, improved self anti-theft capability of well lid greatly.Because the theftproof performance of well lid only is to do small variation to realize on traditional well lid casting mold, therefore do not increase actual production difficulty and cost of production.

The employing of special opening instrument screw mandrel, pressing plate, the structure of adjustable opening pawl has been taken into account general and special-purpose demand contradictory.

Description of drawings is as follows:

Fig. 1 is the elevation of the utility model well lid.

Fig. 2 is the rear elevation of the utility model well lid.

Fig. 3 is the sectional view of Fig. 1.

Fig. 4 is the K portion partial enlarged drawing of Fig. 1.

Fig. 5 is the partial sectional view after last lower draw-bar articulates.

Fig. 6 is the elevation of walling crib.

Fig. 7 is the sectional view of walling crib.

Fig. 8 opens the assembling drawing of tool for the utility model special use.

Fig. 9 is the C-C sectional view of Fig. 8.

Figure 10 is the D-D sectional view of Fig. 8.

Below in conjunction with accompanying drawing the utility model is described in further detail.

Among Fig. 1 to Fig. 6, have three opening grooves 3 on the front of well lid 1, be equipped with the hitch gear that matches on the well lid back side and the walling crib 2.Hitch gear by the well lid back side rise to the bait 17 and walling crib 2 on following hook 18 form, the back side of well lid also is equipped with walling crib ends that spin slot 5 matches ends spin-block 6, as shown in Figure 5, the height 8 that should end spin-block is less than the headway 9 between hook.Tight for making opening groove 3 easily be opened the tool pincers by special use, as shown in Figure 4, opening groove 3 can be made the shallow oblique blind groove with angle of wedge 7.Certainly can also adopt other conventional method, wait and increase clamping force such as groove is set.In addition, can be between each opening groove on the well lid front or do not wait angular indexing along the circumference isogonism, the center to center distance of each opening groove and well lid geometric center can be identical also can be inequality, in force, can change the geometric position between these opening grooves, form plurality of specifications, self anti-theft capability of well lid is further strengthened.

Open in the tool to special use shown in Figure 10 at Fig. 8, open tool and have three opening pawls 10, this pawl is connected in screw mandrel 13 positions of vertical rod 12 by linkage, and a pressing plate 14 is enclosed within present a theatrical performance as the last item on a programme 15 times of vertical rod, and this pressing plate has the chute 16 suitable with the opening pawl.Cross bar 19 is enclosed within the vertical rod, the turn cross bar can be controlled the stretching degree of opening pawl, the geometric position that pressing plate 14 can cover the opening groove according to being driven a well changes makes the plurality of specifications that different runner positions are arranged accordingly, corresponding opening pawl also can be made different size, and the concrete condition of being covered the opening groove according to driving a well is changed and used.

Claims

1, a kind of anti-stealing manhole mouth is made up of well lid 1 and walling crib 2 etc., it is characterized in that:

A) has plural opening groove 3 on the front of well lid 1;

B) be equipped with the hitch gear that matches on the back side of well lid 1 and the walling crib 2,

C) back side of well lid 1 is equipped with walling crib and ends the only spin-block 6 that spin slot 5 matches, and the height 8 that should end spin-block is less than the headway 9 between hook.

2, the anti-stealing manhole mouth according to claim 1 is characterized in that, described opening groove 3 is for having the shallow oblique blind groove of the angle of wedge 7.

3, anti-stealing manhole mouth according to claim 1 is characterized in that, can also can not wait angular indexing along angular indexings such as circumference between the described well lid 1 positive plural opening groove; Each opening groove to the center to center distance of well lid geometric center can be identical also can be inequality.

4, tool is opened in a kind of special use of anti-stealing manhole mouth, it is characterized in that, described opener has plural opening pawl 10, this opening pawl is connected in screw mandrel 13 positions of vertical rod 12 by linkage, one pressing plate 14 is enclosed within present a theatrical performance as the last item on a programme 15 times of vertical rod, and this pressing plate has the chute 16 suitable with the opening pawl.