CN1148495C

CN1148495C - Anti-theft manhole cover

Info

Publication number: CN1148495C
Application number: CNB001071122A
Authority: CN
Inventors: 阅王; 王阅; 胡家杰; 王预
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-04-16
Filing date: 2000-04-16
Publication date: 2004-05-05
Anticipated expiration: 2020-04-16
Also published as: CN1318674A

Abstract

Sewer manholes without covers in residential areas often lead to traffic accidents, fatal accidents and environmental protection accidents. Manhole covers which can be optionally pried off can make criminals easily hide the evidence of crime. The accidents caused by the manholes without the covers are frequently reported by newspapers of various regions, the criminals use the manholes to commit a crime, and people's opinions on the manholes without the covers are showed in the accompanying drawing 2 in the summary. Environmental protection departments have the design that locks are added onto the manhole covers, but the design is difficult to carry out because of the manufacturing, maintaining and protecting difficulties. The present invention adopts a method for adding dowel pins to design the manhole covers with definite safety factors so as to prevent strangers from optionally prying the manhole covers (showed in the accompanying drawing 1 of the summary).

Description

Anti-theft manhole cover

(1) technical field:

The present invention relates to the improvement of manhole cover.

(2) background technology

Manhole cover is stolen often to be lost, and causes traffic, the person and environmental sanitation accident then.In order to solve the antitheft problem of manhole cover, the environmental sanitation department in some cities and towns is forced to the slit of pitch perfusion inspection shaft lid with the well head circle inspection shaft lid be fixed with the adhesion of well head circle.But this causes again when needed, and the work of opening well lid is quite difficult.

(3) summary of the invention

The theft preventing method that the purpose of this invention is to provide manhole cover.

The present invention realizes in the following manner:

Well head circle and inspection shaft lid two parts that the inspection shaft lid is made by cast iron are formed.Circular anti-stealing manhole cover 7 is that each is provided with three pinholes 3 accordingly on the cylindrical side wall of common inspection shaft lid 1 and well head circle 2, and the line angle in per two pinholes and the well lid center of circle all is 120 °.

With concrete mortar the well head circle is being built by laying bricks or stones when being fixed on the inspection shaft mouth, three vertical holes 4 are kept somewhere in three pinhole outsides at the well head circle, the inspection shaft lid is put into after the well head circle, three pinholes of inspection shaft lid are aimed at three pinholes on the well head circle, steely dowel 5 is inserted in the pinhole by hole, and the mutual alignment of inspection shaft lid and manhole cover base promptly is fixed.Then put into stopper 6 in hole, the degree of depth of the aspect ratio hole of stopper is little.Cover with the concrete mortar sealing in the hole space on stopper top.Make the stranger be difficult to find the position of dowel.

The pinhole of rectangle inspection shaft lid can design on four edges, two pairs of pin-and-holes is arranged, totally 8 pairs of pin-and-holes on every limit.During use,, have 16 kinds of methods of arranging dowel if on three limits, select three holes to plug dowel.The stranger is difficult to determine the dowel position grouping.

Circular inspection shaft lid 8 or rectangular well basement lid 9 that inspection shaft lid and well head circle are hinged together can be provided with 6-8 to pinhole on sidewall.During use, optional two pairs of pin-and-holes insert dowel, and total 12-15 kind is arranged the method for dowel.The stranger is difficult to determine the dowel position grouping.

Good effect of the present invention is:

1, this inspection shaft lid has certain anti-theft effect, and can reduce the secondary accident of inspection shaft lid after stolen.

2, this anti-stealing manhole cover manufacturing is simple, installs easily, opens also in case of necessity and is not difficult.

3, also common inspection shaft lid can be transformed into anti-stealing manhole cover in this way.

(4) description of drawings:

Be described further below in conjunction with accompanying drawing:

Fig. 1 be on circular anti-stealing manhole cover and the well head circle pinhole key diagram is set.

Fig. 2 is the key diagram that dowel insertion pinhole and stopper are put into hole.

Circular inspection shaft lid that Fig. 3 is hinged and the dowel method for arranging key diagram on the well head circle.

Rectangle inspection shaft lid that Fig. 4 is hinged and the dowel method for arranging key diagram on the well head circle.

(5) specific embodiment:

As seen from the above, this anti-stealing manhole cover mainly is with the fixing inspection shaft lid of dowel, covers dowel outer hole position with the concrete mortar sealing, makes the stranger be difficult to find the dowel position, is difficult to prize take off the inspection shaft lid and reach anti-theft effect.

It is in order to insert dowel easily that dowel is kept somewhere hole outward.Put into stopper in the hole, the height of stopper is lower than the degree of depth of hole, is not only in order to cover the dowel position but also in order to open the inspection shaft lid where necessary easily, concrete on the cutter unstopper is taken out unstopper and dowel gets final product with concrete mortar sealing then.

Embodiments of the invention relate to a kind of manhole cover with anti-theft effect, comprise well head circle (2) and inspection shaft lid (1) two parts that iron and steel is made, it is characterized in that on the sidewall of inspection shaft lid sidewall and well head circle, having paired pinhole (3), iron and steel dowel (5) inserts this in the pinhole inspection shaft lid and well head circle being fixed together, and the position of dowel is covered by concrete mortar.

For above-mentioned circular anti-theft manhole cover (7), it is characterized in that having three pairs of pinholes on the cylindrical side wall of the cylindrical side wall of inspection shaft lid and well head circle, the angle of per two pinholes and circle center line connecting all is 120 °.

Advance lid (9) for the antitheft sewer basement of above-mentioned rectangle, it is characterized in that having 6-8 to pinhole on inspection shaft lid sidewall and the well head circle sidewall.

Claims

1, a kind of manhole cover with anti-theft effect, comprise well head circle (2) and inspection shaft lid (1) two parts, it is characterized in that on inspection shaft lid sidewall and well head circle sidewall, having paired pinhole (3), steel dowel (5) inserts this in the pinhole inspection shaft lid and well head circle being fixed together, and the position of dowel is covered by the concrete mortar sealing.

2, according to the described circular anti-theft manhole cover of claim 1 (7), it is characterized in that having three pairs of pinholes on the cylindrical side wall of the cylindrical side wall of inspection shaft lid and well head circle, the angle of per two pinholes and circle center line connecting all is 120 °.

3,, it is characterized in that having the right pinhole of 6-8 on inspection shaft lid sidewall and the well head circle sidewall according to the described rectangle anti-theft manhole cover of claim 2 (9).