CN2371237Y - Concrete manhole cover - Google Patents

Abstract

The utility model relates to a manhole cover, particularly a concrete manhole cover. A circular steel plate is adopted by the utility model, a plurality of reinforcing bars are crosswise welded on both ends in the steel plate, then the steel plate is placed into a transversal appliance, steel fibers are properly added into the concrete which is contained with sand and stones, and then, the concrete is poured into the steel plate to be formed. The utility model avoids the bodily injury caused by the loss of the manhole cover because the manhole cover which is cast with iron is easy to steal and sell, and also solves the problem that the strength of the manhole cover which is made of concrete singly is not enough. The utility model has the advantages of simple structure, easy manufacture, large strength, low cost and long service life.

Description

New concrete inspection shaft lid

The utility model relates to a kind of inspection shaft lid, particularly a kind of concrete inspection shaft lid.

The inspection shaft lid that uses at present mostly is the pig iron or castiron.The people that some love are sought petty gains usually steals the salvage collection department that sells with the inspection shaft lid, and to exchange wealth for, this is the main cause of inspection shaft losing of cover on the road.And losing of inspection shaft lid very easily makes pedestrian, bicycle, motor vehicle etc. accidents happened on the road, and the lighter is injured, weight person's threat to life.And the unusual headache of problem relevant department hereto, the one, be difficult in time find the inspection shaft losing of cover, do not reach sometimes and find just to go out to get over; The 2nd, lose and fill, to lose again again and mend, spirit and funds all hold dares not accept.Some producer expects replacing the pig iron or cast iron to make inspection shaft lid with concrete, but because concrete inspection shaft drowning has the pig iron or cast iron durable, is unable to undergo the impact of motor vehicle and bicycle, will soon be damaged until wracking.So the still a large amount of in the street pig iron or castiron inspection shaft lids of using.

The purpose of this utility model just is to overcome above-mentioned defective, designs a kind of brand-new inspection shaft lid.

The technical solution of the utility model is: there is the ring shape steel plate in the concrete outside in moulding, is welded with crisscross reinforcing bar at the inboard two ends of ring shape steel plate.

Advantage of the present utility model and effect are to reduce in a large number the use amount of iron, and it is profitless that the people who makes those love seek petty gains steals the inspection shaft lid, from stopping steal phenomenon economically; Simultaneously since the consumption of iron reduce, most of usefulness be cheap concrete, cost reduces greatly, steals the back and is not worth, thereby fundamentally stopping pilferage; And structure is hard, can the absorption machine motor-car and bicycle to the impact of inspection shaft lid, prolong application life greatly.

Description of drawings:

Fig. 1-the utility model ring shape steel plate structure schematic diagram.

Fig. 2-the utility model cross-sectional structure schematic diagram.

Fig. 3-the utility model schematic appearance.

Embodiment:

As shown in Figure 1:, press the several rows of welding of widthwise, and then, form crisscross shape by the vertical several rows of welding of direction at many fine steel ribs 2 of inboard two ends welding of ring shape steel plate 1; As shown in Figure 2: ring shape steel plate 1 is put into mould, in ring shape steel plate 1, adds concrete again, comprise sand, stone etc., in concrete, put into steel fibre 3 again, moulding then, the utility model, as shown in Figure 3; As Fig. 1, Fig. 2, shown in Figure 3: the return-air hole 4, one of symmetry is arranged on the longitudinal and transverse direction on the inspection shaft cap surface of moulding, can be with the air scavenge in the pipeline, in case gas expands in the pipeline, the 2nd, for having made things convenient for sled.

Claims (2)

1. new concrete inspection shaft lid is characterized in that there is the ring shape steel plate in the concrete outside of moulding, is welded with crisscross reinforcing bar at the inboard two ends of ring shape steel plate.

2. new concrete inspection shaft lid according to claim 1 is characterized in that steel fibre is arranged in the concrete.

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