CN2753801Y

CN2753801Y - Steel plate frame polyester glass fibre reinforced composite material manhole cover

Info

Publication number: CN2753801Y
Application number: CN 200420116729
Authority: CN
Inventors: 周虹
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-11-29
Filing date: 2004-11-29
Publication date: 2006-01-25
Anticipated expiration: 2014-11-29

Abstract

The utility model relates to a steel plate framework polyester glass fibre reinforced composite material manhole cover, the manhole cover is provided with a steel plate framework and the lower surfaces of both ends of each steel plate in the steel plate framework are welded with steel plate plates in a horizontal direction. Composite materials are covered and attached on the steel plate framework. The utility model has the making methods that the steel plate framework is welded and is put into a lower mould of a hot steel mould firstly, and glob-shaped glass fibre reinforced unsaturated polyester resin mould compounds can be added above the steel plate framework to close the mould and to be pressurized. The utility model has the compression mould conditions that the temperature is from 130 DEG to 160DEG, the pressure is 200-500 kg/cm< 2 >, and the utility model can be taken out after pressure maintaining from 10 mm to 15 mm to obtain the steel plate framework polyester glass fibre reinforced composite material manhole cover. The utility model has the advantages of simple manufacturing technique, low cost, good fatigability resistance, long service life, high bearing strength, etc.

Description

Steel plate frame polyester glass fibre reinforced composite well lid

One, affiliated technical field

The utility model relates to a kind of composite drain cover.

Two, background technology

Manhole cover that uses on the road and water collecting well cover kind are a lot, mainly contain three major types at present: i.e. casting iron well lid, steel fibrous concrete well lid, polymer composites well lid, they respectively have pluses and minuses.The polymer composites well lid is from structure and material, also respectively have any different, such well lid of Shi Yonging mostly is glass-fibre reinforced resin moulding compound (be called for short BMC and SMC) to add the reinforcing bar enhancement mode molded in the market, main cause is that this manufacture course of products is simple, with low content of technology, product cost is low, is not subjected to the market favor and there is recovery value.After using a period of time (1～2 year), find this series products through normally frequently execute carry after, it is a lot of well lid distortion and phenomenon of rupture to occur.This illustrates that this series products fatigue durability is poor, does not reach requirement application life.

Chinese patent once disclosed a kind of " mold pressing inspection shaft lid " (ZL992525284, CN2393913Y, the day for announcing: on August 30th, 2000), it has adopted one or more layers reinforcing bar intersecting parallels welded construction, makes well lid with composite material through heating high-pressure mold pressing cladding reinforcing steel bar skeleton then.Because poor toughness, modulus and the intensity of this composite material are low, make a maximal destruction bearing capacity of well lid reach higher level though wherein play the reinforcing bar welded framework of main carrying effect, but the well lid distortion is bigger executing when being downloaded to ordinance load, be easy to make the matrix material cracking of coating, cause well lid very short fatigue life, do not reach regulation application life; And the reinforcing bar that behind the cracking Naked is revealed contacts with moisture content for a long time with air, also can make its corrosion and ineffective.In addition, in order opening conveniently certain slit should to be arranged between well lid and the well seat, to be generally 6 ± 2mm (CJ/T3012-93); So when on road, using, press displacement to wear and tear between the two because of wheel makes to produce to be with relatively.Because the composite-material abrasive poor performance is used a period of time just to find progressively to be worn with the contacted part of well seat below the well lid, thereby is made the thickness attenuation of well lid outer, and then influences well lid integrated carrying ability, reduces application life.

Three, utility model content

The purpose of this utility model is to provide a kind of steel plate frame polyester glass fibre reinforced composite well lid, and it has, and manufacturing process is simple, cost is low, fatigue durability is good, the life-span is long, the bearing strength advantages of higher.

For achieving the above object, the solution that the utility model is taked is: a kind of steel plate frame polyester glass fibre reinforced composite well lid, well lid has steel plate frame, be welded with sheet steel below the two ends of every steel plate horizontal direction in this steel plate frame, this steel plate frame mold pressing is coated with composite material.

Welding one sheet steel below the two ends of every steel plate horizontal direction of the utility model by in the steel plate frame structure is to improve the abrasion resistance of well lid when it rubs with the well seat.This steel plate frame makes its sheet steel contact with the bearing surface of well seat supporting well lid after composite material moulded coating.Because the abrasion resistance of metal steel disc is good, well lid outer lower plane is difficult for because of the wearing and tearing attenuation, this design has simultaneously also improved the intensity of steel plate frame.This well lid has that manufacturing process is simple, cost is low, and its fatigability is good, the life-span long, the bearing strength advantages of higher.

Its manufacture method is that at first the welding steel skeleton is put into this steel plate frame in the counterdie of hot punching block, and the bulk glass that adds in the above through weighing strengthens the unsaturated polyester resin moulding compound, the matched moulds pressurization, mold pressing parameter: temperature is 130～160 ℃, pressure is 200～500kg/cm ², and take out behind pressurize 10～15mm, get steel plate frame polyester glass fibre reinforced composite well lid.

The utility model at first is to carry out heating high-pressure mold pressing cladding steel framework with the steel plate frame structure of globality high-bearing capacity by the glass-fibre reinforced resin moulding compound to make the high-strength, fatigue-resistant composite drain cover.Its principle is under identical weight, and the bearing capacity of steel plate frame is greater than the welded framework of reinforcing bar.Make product like this under identical load, it is out of shape also just less than cage of reinforcement.As long as when guaranteeing that composite material is out of shape under specified load, its toughness reaches indehiscent requirement, just can improve the tired application life of well lid.

Four, description of drawings

Fig. 1 is that embodiment one (the heavy circle of Ф 700mm well lid) cuts structural perspective open.

Fig. 2 is Fig. 1 light plate skeleton stereogram.

Fig. 3 is that embodiment two (750 * 450mm square water collecting well cover) cuts structural perspective open.

Fig. 4 is Fig. 3 light plate skeleton stereogram.

Fig. 5 is that embodiment three (the heavy well lid of square) cuts structural perspective open.

Fig. 6 is Fig. 5 light plate skeleton stereogram.

Among the figure: 1, composite material, 2, steel plate frame, 21, steel plate, 22, sheet steel.

Five, the specific embodiment

Below in conjunction with embodiment and accompanying drawing thereof the utility model is remake description.

Referring to Fig. 1-Fig. 6, a kind of steel plate frame polyester glass fibre reinforced composite well lid, well lid has steel plate frame 2, is welded with sheet steel 22 below the two ends of every steel plate 21 horizontal directions in this steel plate frame 2, and these steel plate frame 2 mold pressings are coated with composite material 1.

(press CJ/T3012-93 standard method test) after tested, the weight bearing power of well lid all reaches standard-required.

Claims

1, a kind of steel plate frame polyester glass fibre reinforced composite well lid, it is characterized in that: well lid has steel plate frame (2), be welded with sheet steel (22) below the two ends of every steel plate (21) horizontal direction in this steel plate frame (2), this steel plate frame (2) mold pressing is coated with composite material (1).