CN2823333Y

CN2823333Y - Composite manhole cover

Info

Publication number: CN2823333Y
Application number: CN 200520003625
Authority: CN
Inventors: 段新杰
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-01-16
Filing date: 2005-01-16
Publication date: 2006-10-04
Anticipated expiration: 2015-01-16

Abstract

The utility model provides a kind of inspection shaft lid that is composited by the iron and steel cement concrete, its pedestal and framework (1) are cast with metallic iron and are formed, and in framework (1) according to some cross needle beams (3) of required corresponding setting to play firm effect, institute in framework (1) all inserts standard cement concrete (2) on having living space then, and according to design 2 dismounting holes (4) is set and pour into a mould a kind of inspection shaft that forms and cover.This inspection shaft lid can keep designing requirement, plays positive effect to antitheft again when reducing production costs.

Description

Composite manhole cover

Affiliated field

The utility model relates to a kind of inspection shaft lid that forms with the composite material cast.

Figure viewed from behind technology

Inspection shaft used in the urban construction at present covers, all be to adopt the metallic iron casting to form on the material, though reached requirement so technically, but because material therefor is an iron and steel, self-value is higher relatively, so often suffer thief's theft, the annual stolen inspection shaft lid in each big small city, the whole nation is difficult to counting, directly causes thousands of more than one hundred million economic loss to country.Simultaneously, cause Pedestrians and vehicles to fall into owing to the inspection shaft lid is stolen and cause the also of common occurrence of personal injury in the inspection shaft.

For addressing this problem, patent ZL.97233715.6 proposes to cover with the inspection shaft that bamboo plate and cement concrete cast form, reduce though on cost, had significantly, but because this product maximum load capacity has only 5 tons, when meeting heavy-duty vehicle pressure stone roller, just rupture easily, do not reach the requirement of its Intensity Design.Another new product adopts hard plastic cement replacement metallic iron, but because its inspection shaft lid all is in the open outside all the year round, after exposing to the weather, generation is worn out and produced crisp folding easily.Another method is exactly all to form with cement concrete cast, but because the cement concrete on its four limit is immalleable, rolled by vehicle after, just fall the piece phenomenon easily, the time grown after with regard to the damage of breaking gradually.

Summary of the invention

The purpose of this utility model provides a kind of inspection shaft lid that is formed by steel casting concrete composite casting, it can reduce the self-value of inspection shaft lid effectively, cost of production is descended significantly allow the burglar that it is lost interest in and play antitheft effect, reach a name technical requirements of design simultaneously again.

The purpose of this utility model is achieved in that pedestal, the framework that casts out the inspection shaft lid with metallic iron, and in framework according to the size of framework, some cross needle beams of corresponding setting, to play firm effect, cross needle beam and framework are cast into an integral body, all use the standard cement concrete to tamp cast on the institute in framework has living space then and form.

After adopting such structure, owing on material, reduced the use amount of iron and steel in a large number, also just reduced the self-value of inspection shaft lid, also just reduced cost of production accordingly, the burglar also just loses interest in to this, thereby plays effect not only antitheft but also that reduce production costs.Owing to adopted cement concrete constructions,, be two to get at one stroke simultaneously in the requirement that also just can meet on the intensity in the design.

Description of drawings

What Fig. 1 provided is the schematic diagram of rectangle inspection shaft lid

What Fig. 2 provided is the schematic diagram of circular inspection shaft lid

Among the figure: 1, framework 2, cement concrete 3, cross needle beam 4, dismounting hole

Embodiment

Describe the concrete implementation detail that the utility model proposes in detail below in conjunction with accompanying drawing.

This structure is exactly pedestal and the framework (1) that casts out earlier the inspection shaft lid with ferrous materials, in the framework (1) according to the size of its framework (1) and some cruciform girders of relative set (3), to play firm effect.Then in framework (1) all insert standard on having living space cement concrete (2) poured into a mould, according to design 2 dismounting holes (4) are set during cast, defects liability period is pressed the reinforced cement concrete standard and is carried out.So just made an inspection shaft lid that is composited with the iron and steel cement concrete.Its shape can be rectangle, circular or other shape.Earlier pedestal is watered admittedly on inspection shaft during use, use dismantling device to insert from the dismounting hole (4) of inspection shaft lid then, mention the inspection shaft lid, the position in fixed block position and the pedestal matches, and is placed on the inspection shaft stably.

Claims

1, a kind of inspection shaft lid, it is to be cast as framework (1) and standard cement concrete (2) composite casting forms by ferrous metal; It is characterized in that: being cast as circle, rectangle, foursquare framework (1) and cross needle beam (3) with ferrous metal is an integral body, and have living space all in the framework (1) tamped a kind of inspection shaft that cast forms with standard cement concrete (2) and covered.