KR20090099166A - Complex material manhole cover, complex material manhole assembly and method of making thereof - Google Patents

Abstract

A complex material manhole cover, a complex material manhole assembly and a manufacturing method thereof are provided to reduce fabrication cost and facilitate construction by using complex material consisting of glass fiber and synthetic resin and reducing weight. A complex material manhole cover(200) comprises a glass fiber layer and a synthetic plastic layer(230). The synthetic plastic layer is contacted with the glass fiber layer in order to be infiltrated into the glass fiber layer. The glass fiber layer comprises glass fiber frames(220,240) contacted with the synthetic plastic layer. The glass fiber layer comprises a glassfiber sheet(210) contacted with the glass fiber frame. The synthetic plastic layer comprises the unsaturated polyester resin. The synthetic plastic layer includes more quartz. The thickness of the complex material manhole cover is getting increased toward the central part. An anti-abrasion layer(250) is formed on the upper end of the complex material manhole cover.

Description

Composite material manhole cover, composite material manhole assembly and method of manufacturing the same

The present invention relates to a composite manhole cover, a composite resin manhole assembly comprising the same, and a manufacturing method thereof. More specifically, by forming a manhole assembly made of a composite material including glass fiber and synthetic resin, it is light and easy to install, and the manufacturing cost is lower than that of a cast iron manhole. By accepting the load uniformly, the strength to withstand the load can be improved, the life span is semi-permanent, there is no risk of theft, and the artistic design can be added according to the user's request, so that the man-made beautiful view can be made beautifully. It relates to a lid and a composite resin manhole assembly comprising the same and a method of manufacturing the same.

In general, the manhole is to allow the operator to enter the underground pipes to manage and repair the underground installations. The manhole includes a manhole for drainage pipes installed at the opening of the drainage pipe to discharge sewage or rainwater, and a manhole for laying cables for laying telecommunication or electric cables. In addition, there are a manhole for water supply and a manhole for fire extinguishing.

Manhole covers are usually made of cast iron. Manhole cover made of cast iron has the advantage of strong load bearing strength and semi-permanent life. However, cast iron manhole cover has a problem that the price is high, the risk of theft is high, and damaged by corrosion in long-term use. In addition, the manhole cover of cast iron material has a difficulty in construction by cutting round the sidewalk block to match the shape of the manhole cover, there is a problem that there is a risk of electric shock due to electrical leakage because of the conductor. In addition, the manhole cover for fire-fighting is generally painted yellow, the manhole cover of cast iron material is easy to erase the paint is difficult to distinguish, there is a drawback to hurt the aesthetics of the city.

In order to overcome the disadvantages of the cast iron manhole cover, a cement manhole cover was developed. However, the cement manhole cover has a problem in that the force to withstand the load is limited and the life is relatively short, so that it cracks and prolongs its use for a long time, causing environmental pollution. In addition, the manhole cover of the cement material is manufactured by mixing the cement and artificial stone, there is a disadvantage that the color and the manhole surface must be simple.

The present invention has been made to solve the above problems, in particular, light weight, easy construction, low production cost compared to the manhole made of cast iron material, by the structure of the arched floor to the floor interlocking action of the load The uniform manhole cover can improve the load-bearing force, the life is semi-permanent, there is no risk of theft, and the artistic design can be added according to the user's request. An object of the present invention is to provide a composite resin manhole assembly and a method of manufacturing the same.

Composite manhole cover according to the present invention devised to achieve the above object is a glass fiber layer; And it characterized in that it comprises a synthetic resin layer in contact with the glass fiber layer to penetrate the glass fiber layer.

In addition, the glass fiber layer may include a glass fiber frame in contact with the synthetic resin layer, and a glass fiber fabric in contact with the glass fiber frame.

In addition, the synthetic resin layer may include an unsaturated polyester (PE) resin.

In addition, the synthetic resin layer may further include quartz.

In addition, the composite manhole cover may increase in thickness toward the center.

In addition, the composite manhole cover may further include a wear protection layer on the top.

Composite manhole assembly according to the invention the composite manhole cover; And it characterized in that it comprises a manhole support having a locking step for holding the composite manhole cover.

In addition, the manhole support may include a glass fiber layer and a synthetic resin layer in contact with the glass fiber layer to penetrate the glass fiber layer.

In addition, the glass fiber layer may include a glass fiber frame in contact with the synthetic resin layer, and a glass fiber fabric in contact with the glass fiber frame.

Composite manhole assembly manufacturing method according to the invention comprises the steps of (a) preparing a material; (b) filling a mixture of quartz and resin in a glass fiber fabric and a glass fiber frame; (c) pulverizing the mixture while vibrating; And (d) covering with a mold and applying pressure.

In addition, after the step (c) may further comprise the step of laying the fiberglass frame and glass fiber fabric.

In addition, the step (a) may comprise the step of cutting the glass fiber fabric.

In addition, the step (a) may include a step of grinding and mixing the quartz and the resin.

In addition, the step (a) may comprise the step of immersing the glass fiber yarn in the resin to produce a glass fiber frame.

In addition, after the step (d) may comprise the step of molding the product separated from the mold.

According to the present invention, by forming a manhole assembly made of a composite material containing glass fiber and synthetic resin, it is light and easy to install, and the manufacturing cost is lower than that of a cast iron manhole, and it has a structure in which several layers interlock with each other to withstand load. The ability is excellent.

In addition, according to the present invention there is an effect that can be improved by the load of the load by uniformly receiving the load by the interlocking action of the various layers by the structure of the arch bottom.

In addition, according to the present invention, the life is semi-permanent, there is no risk of theft, it is possible to add an artistic pattern according to the user's needs, it is effective to create a beautiful city view.

In addition, the present invention is excellent in corrosion resistance and can withstand corrosion even in the seaside adjacent to a lot of salt, there is no need to cut round the sidewalk block around, there is an effect that the construction is easy.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are assigned to the same components as much as possible, even if shown on different drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted. In addition, preferred embodiments of the present invention will be described below, but the technical idea of the present invention is not limited thereto, but may be variously modified and modified by those skilled in the art.

1 is an exploded perspective view of a composite manhole assembly according to one embodiment of the present invention. FIG. 2 is a cross-sectional view taken along line AA ′ of the composite manhole cover of FIG. 1. FIG. 3 is a plan view of the composite manhole support in FIG.

Composite manhole assembly 100 according to an embodiment of the present invention (hereinafter referred to as "manhole assembly"), referring to Figure 1, composite manhole cover 200 (hereinafter referred to as "manhole cover") and manhole support ( 300) is formed. The manhole support 300 is also preferably formed of the same material as the manhole cover 200, but may also be formed of a different material. Here, the material of the manhole support 300 is not limited.

The manhole cover 200 is formed to increase in thickness toward the center portion, and has an arch shape. Such a structure has an excellent ability to withstand load compared to a coin shape having a uniform thickness. In addition, the manhole cover 200 is laminated with a different material layer, thereby increasing the force to withstand the load by the mutual locking between each layer.

Manhole cover 200, referring to Figure 2, from the bottom to the top of the glass fiber fabric 210, glass fiber frame 220, synthetic resin layer 230, glass fiber frame 240, and wear protection layer 250 ). Hereinafter, the glass fiber fabric 210 and the glass fiber frame 220 will be referred to as a "glass fiber layer" for convenience.

The glass fiber fabric 210 is located at the bottom of the manhole cover 200 to prevent the manhole cover 200 from cracking. Glass fiber is a mineral fiber in which the molten glass is made into fibers, and the fiber is formed by mechanically stretching the melted glass, blowing it with air or water vapor, or blowing it around by centrifugal force. Glass fiber has excellent heat resistance, flame resistance, low water absorption and hygroscopicity. In addition, glass fiber does not corrode because of excellent chemical durability, has excellent tensile strength and small elongation. At this time, the tensile strength of the glass fiber increases as the thinner, the thermal conductivity is lowered as the thinner at the same specific gravity. The glass fiber fabric 210 is attached to the glass fiber frame 220 and the synthetic resin layer 230 by a mixture of resin and quartz forming the synthetic resin layer 230.

The glass fiber frame 220 is located on the upper portion of the glass fiber fabric 210, and absorbs most of the load and serves to distribute some of the fiber to the surroundings. Glass fiber frame can be produced in a shape to fit the mold by dipping glass fiber yarn in the resin. Fiberglass frames are elastic and are not easily broken by external forces. In addition to the inherent strength of the glass fiber frame, quartz and resin of the synthetic resin layer 230 serve to reinforce the strength.

The synthetic resin layer 230 contacts the glass fiber layers 210 and 220 so as to penetrate the glass fiber layers 210 and 220. The synthetic resin layer 230 penetrates between the glass fiber layers 210 and 220 to make the manhole cover 200 integrally, and assists the strength of the glass fiber fabric 210 and the glass fiber frame 220. The synthetic resin layer 230 may be made of a mixture of quartz and synthetic resin, and the synthetic resin may be an unsaturated polyester (Unsaturated PolyEster) resin. Unsaturated polyester resin is a high molecular compound belonging to a thermosetting plastic. A primary resin having a molecular weight of 1,000 to 3,000 having a polymerizable double bond is made and cured using a vinyl unit such as styrene to form a molded product. In addition, the synthetic resin layer 230 may be manufactured in a shape in which the thickness increases toward the central portion.

The upper portion of the synthetic resin layer 230 is laminated with a glass fiber frame 240 to secure the strength, the top of the wear protection layer 250 is formed. The wear protection layer 250 is to prevent the surface from being easily worn. For example, the wear protection layer 250 may be manufactured by bonding quartz to an wear resistant material and a light stabilizer.

The wear protection layer 250 may be integrated with the art of art, weak art and color art based on the user's demand, and applied to the surface of the manhole cover to beautifully create an urban aesthetic. For example, the wear protection layer 250 may be inserted into a design, a picture, a logo by applying a variety of colors can be a unique design.

Although not shown, the manhole cover may be used for rainwater, fire extinguishing, etc. in addition to water and sewage. Rain manhole cover is preferably provided with a plurality of discharge holes along the edge. In the case of fire-fighting manhole covers, additional yellow circles can be designed according to the appointment.

Referring to FIG. 3, the manhole support 300 includes a square main frame 310 having a hollow, and a locking step 320 on which an outer circumference of the manhole cover 200 is seated. The manhole support 300 is also preferably formed of the same material as the manhole cover 200 to secure strength, but may be made of other materials as mentioned above. Since the main frame 310 is formed in a square shape, the manhole support 300 does not need to be cut by constructing a sidewalk block around the manhole to match the shape of the manhole cover. Therefore, the construction is very easy and the working time can be shortened.

4 is a plan view of a manhole support according to another embodiment of the present invention.

Manhole support 400 may be formed in a circular shape as needed, as shown in Figure 4, in this case, the main frame 410 of the circular shape having a hollow and the locking jaw 420 is seated the outer periphery of the manhole cover It is provided.

As described above, the manhole assembly according to the present invention has a lower manufacturing cost than a manhole made of cast iron material, and has a curved bottom structure, thereby allowing multiple layers to interlock so that the load can be uniformly received, thereby improving the force to withstand the load. . In addition, the manhole assembly according to the present invention has a life span of about 30 years or more and is semi-permanent, and since it is impossible to recycle, there is no risk of theft and the artistry can be added to the user's demand, thereby creating a beautiful city. In addition, the manhole assembly according to the present invention is excellent in corrosion resistance and can withstand corrosion even in a beach area with a lot of salt, and construction is easy.

5 is a flow chart of a manhole assembly manufacturing method according to a preferred embodiment of the present invention. Hereinafter, a case in which the manhole cover and the manhole support constituting the manhole assembly are formed of the same material will be described as an example.

Manhole assembly manufacturing method according to a preferred embodiment of the present invention, referring to Figure 5, the step of preparing a material (S10), the step of filling a mixture of quartz and resin in a glass fiber fabric and glass fiber frame (S20), It comprises a step (S30) for compacting while vibrating, the step (S40) of covering and applying pressure to the mold, and the step (S50) of separating and molding from the mold.

S10 is a step of preparing a material, according to the size of the mold to cut the glass fiber fabric, using a grinder and a raw material mixer to crush and mix the quartz and resin uniformly, using a glass fiber yarn immersed in the resin Fabricating a tailored fiberglass framework.

S20 is a step of filling a glass fiber layer with a mixture of quartz and resin, and spreads the glass fiber fabric evenly over the glass fiber frame and spreads a mixture of quartz and resin.

S30 is a step of pulverizing by vibrating using a vibrator so that the quartz and resin filled between the glass fiber layer is well compacted, in which the gas can be completely discharged during the vibration process.

Although not shown, it may include the step of spreading the fiberglass frame and the fiberglass fabric once more on the quartz and resin layer chopped by S30.

S40 is a step of covering the upper mold and the lower mold and applying pressure to suit the production conditions using a pressurizer. At this time, the production conditions can be changed according to the properties of the desired product, the pressure can be carried out for a time of 15-30 minutes at a temperature of -10 ~ 60 ° C with a pressure of approximately 20kN ~ 30kN. In this case, the pressurization time may vary depending on external temperature and humidity conditions.

S50 is a step of separating the product from the mold and forming naturally.

Although not shown, it may further comprise the step of finishing the round and corners around the product after molding.

The above descriptions are merely illustrative of the technical idea of the present invention, and various modifications, changes, and substitutions may be made by those skilled in the art without departing from the essential characteristics of the present invention. It will be possible. Accordingly, the embodiments disclosed in the present invention and the accompanying drawings are not intended to limit the technical spirit of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by the embodiments and the accompanying drawings. . The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

The present invention can be widely used for manholes for walkways, electrical, telecommunications, city gas, etc., including rainwater, waterworks, sewerage, fire extinguishing manholes.

1 is an exploded perspective view of a composite manhole assembly according to one embodiment of the present invention;

2 is a cross-sectional view taken along line A-A 'of the composite manhole cover of FIG.

3 is a plan view of the composite manhole support in Figure 1,

4 is a plan view of a manhole support according to another embodiment of the present invention;

5 is a flow chart of a manhole assembly manufacturing method according to a preferred embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

100-Composite Manhole Assemblies 200-Composite Manhole Covers

300, 400-manhole support 310, 410-main frame

320, 420-Jamming jaw

Claims (15)

Glass fiber layer; And Synthetic resin layer in contact with the glass fiber layer to penetrate the glass fiber layer Composite manhole cover comprising a. The method of claim 1, wherein the glass fiber layer Composite manhole cover comprising a glass fiber frame in contact with the synthetic resin layer, and a glass fiber fabric in contact with the glass fiber frame. The method of claim 1, The synthetic resin layer is a composite manhole cover, characterized in that containing an unsaturated polyester (PE) resin. The method of claim 1, The synthetic resin layer further comprises a quartz manhole cover. The method of claim 1, Composite manhole cover, characterized in that the thickness increases toward the center. The method of claim 1, Composite manhole cover further comprises a wear protection layer on the top. Composite manhole cover according to any one of claims 1 to 6; And A manhole support having a locking jaw supporting the composite manhole cover Composite manhole assembly comprising a. The method of claim 7, wherein The manhole support is a composite manhole assembly comprising a glass fiber layer and a synthetic resin layer in contact with the glass fiber layer to penetrate the glass fiber layer. The method of claim 8, wherein the glass fiber layer A composite manhole assembly comprising a glass fiber frame in contact with the synthetic resin layer and a glass fiber fabric in contact with the glass fiber frame. (a) preparing the material; (b) filling a mixture of quartz and resin in a glass fiber fabric and a glass fiber frame; (c) pulverizing the mixture while vibrating; And (d) covering with mold and applying pressure Composite manhole assembly manufacturing method comprising a. The method of claim 10, Method of manufacturing a composite manhole assembly after the step (c) further comprising the step of laying the glass fiber frame and glass fiber fabric. The method of claim 10, The step (a) is a composite manhole assembly manufacturing method comprising the step of cutting the glass fiber fabric. The method of claim 10, The step (a) is a composite manhole assembly manufacturing method comprising the step of mixing and mixing the quartz and resin. The method of claim 10, The step (a) is a composite manhole assembly manufacturing method comprising the step of immersing the glass fiber yarn in the resin to produce a glass fiber frame. The method of claim 10, And after the step (d), separating the product from the mold and molding the composite manhole assembly.

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