KR-102961783-B1 - MANHOLE RAISING RING MANUFACTURING METHOD AND MANHOLE RING THEREOF

Abstract

The present invention relates to a method for manufacturing a manhole lifting ring and a manhole lifting ring, and more specifically, to an improved method for manufacturing a manhole lifting ring and a manhole lifting ring that can easily be leveled with the ground surface and significantly improve durability and maintainability when constructing a manhole for maintenance in the underground of a road or sidewalk, or during the construction of a septic tank. The present invention comprises a waste vinyl receiving step (S10) in which discarded waste vinyl is collected, gathered, washed, and classified to separate foreign substances and receive the waste vinyl for making a molten material; a first melting step (S12) in which the received waste vinyl is placed into a melting device and a predetermined heat is applied to melt the waste vinyl and filter out impurities; a second melting step (S14) in which the molten material from which impurities have been filtered in the first melting step is heated and melted again to obtain a more precise and homogeneous molten material; a mold input step (S16) in which the molten material that has undergone the second melting step is fed into a press molding device to manufacture a molded product; a mold pressurizing step (S18) in which the molten material is placed into the molding die of the press molding device and the upper die is lowered from the top to the bottom to apply pressure to manufacture a molded product; a molding and demolding step (S20) in which the molded product is discharged from the press molding device (300) after undergoing the mold pressurizing step; and after undergoing the molding and demolding step, The method is characterized by including a mold forming cutting step (S22) for removing residue remaining on the outer edge or surroundings of a manufactured molded product, a manhole lower body completion step (S24) for completing a cylindrical manhole lower body (102) equipped with a flange portion after removing residue remaining on the outer edge or surroundings of the molded product through external inspection and dimensional inspection, and a manhole upper body assembly step (S26) for installing a manhole upper body (104) that is seated and fixed on the upper part of the manhole lower body after the manhole lower body is completed, so as to be adjusted to be horizontal with the ground surface. The method for manufacturing a manhole lifting ring and the manhole lifting ring of the present invention have the advantage of allowing for rapid work by simply adjusting the height of the manhole lifting ring installed on a road or in a septic tank, and thereby have the effect of significantly improving constructability. Furthermore, the present invention has the effect of significantly improving the maintenance and upkeepability of the manhole ring, as the lower body of the manhole ring is easy to adjust in height, making installation simple and easy, and the upper body of the manhole ring is made of a sturdy metal material, providing excellent durability so that it can be used semi-permanently.

Inventors

• 이대식

Assignees

• 조은세상 주식회사

Dates

Publication Date

20260508

Application Date

20250611

Claims (3)

1. A waste vinyl receiving stage (S10) in which discarded waste vinyl is collected, gathered, washed, and sorted to separate foreign substances and wash, and then received to make a molten material; A first melting step (S12) for placing the received waste vinyl into a melting device and applying a predetermined heat to melt the waste vinyl and filter out impurities; A second melting step (S14) for obtaining a more precise and homogeneous melt by heating and melting the melt from which impurities have been filtered out in the first melting step above; A mold insertion step (S16) for introducing the molten material that has undergone the above second melting step into a press molding device to manufacture a molded product; A mold pressing step (S18) for manufacturing a molded product by placing it into the mold of the above-mentioned press forming device and lowering the upper die from the top to the bottom to apply pressure; After the above mold pressurization step, a molding and demolding step (S20) for discharging the molded product from the press molding device (300); After the above molding and demolding steps, a mold forming and cutting step (S22) for removing residue remaining on the outer edge or periphery of the manufactured molded product; A manhole lower body completion step (S24) in which, after removing any residue remaining on the outer edge or periphery of the above-mentioned molded product, a cylindrical manhole lower body (102) equipped with a flange portion is completed through external inspection and dimensional inspection; After completing the above-mentioned manhole lower body, the method includes a manhole upper body assembly step (S26) for installing a manhole upper body (104) by attaching and fixing it to the upper part of the above-mentioned manhole lower body to adjust it to be level with the ground surface, wherein The above manhole ring lower body (102) is made of a cylindrical lower body (26), a flange portion (28) is formed on the upper outer periphery of the lower body (26) to protrude outward, a fixing jaw portion (30) is formed on the upper inner periphery of the lower body (26) to protrude inward, and a seating surface (32) is formed on the upper part of the fixing jaw portion (30). The above manhole ring upper body (104) comprises an upper body (34) formed in a circular band shape and a plurality of reinforcing ribs (36) formed by connecting the inner parts of the upper body (34) in an intersecting manner. The lower body (102) of the above manhole ring is made of synthetic resin material using waste materials such as waste vinyl, waste PE, waste PET, and waste PVC, and the upper body (104) of the above manhole ring is made of spheroidal graphite cast iron or metal material. The above manhole ring upper body (104) is installed by being seated on the upper surface (32) of the fixing jaw portion (30) formed on the upper inner circumference of the above manhole ring lower body (102), and the above manhole ring upper body (104) is installed by being connected by a distance of 10-20 cm so as to protrude higher than the upper surface of the above manhole ring lower body (102). A height adjustment band (106) is provided between the lower manhole body (102) and the upper manhole body (104). A method for manufacturing a manhole lifting ring, characterized in that the height adjustment band (106) is seated on the seating surface (32) formed on the upper part of the fixed jaw portion (30), and the manhole ring upper body (104) is installed by coupling on the upper part of the height adjustment band (106).
2. delete
3. A manhole lifting ring manufactured by the method of claim 1.

Description

Manhole Raising Ring Manufacturing Method and Manhole Raising Ring The present invention relates to a method for manufacturing a manhole lifting ring and a manhole lifting ring, and more specifically, to an improved method for manufacturing a manhole lifting ring and a manhole lifting ring that can easily be leveled with the ground surface and significantly improve durability and maintainability when constructing a manhole for maintenance in the underground of a road or sidewalk, or during the construction of a septic tank. Generally, countless facilities such as water pipes, sewer pipes, power cables, and communication cables are buried beneath roads and sidewalks. These facilities must be maintained frequently as needed. Manholes are constructed at regular intervals to facilitate the maintenance of these underground facilities. Typically, frequent vehicle traffic causes wear between the manhole cover and the housing, or damages or detachment of components such as rubber rings installed inside the housing, resulting in a height difference with the road surface. In other words, the upper surface of the manhole cover becomes lower than the road, creating a height gap. This height difference not only hinders vehicle movement but, in severe cases, can lead to accidents. Furthermore, noise and vibration emanating from the manhole during vehicle traffic cause inconvenience to pedestrians and nearby residents. As such, when the road height changes due to road repaving, asphalt overlaying, road expansion work, etc., the height of the existing manhole cover becomes relatively lower, posing a risk to pedestrians and vehicle traffic. Therefore, a manhole lifting ring is installed and used for height adjustment to match the height and level of the basic manhole with the surrounding terrain and road. It is a structure that is essential, especially in sewage and rainwater receiving facilities, as it determines water flow and drainage efficiency. In the case of conventional structures, the lifting ring does not fit the diameter of the manhole frame accurately, making it difficult to use and resulting in the disadvantage of not being able to properly support the manhole cover. In addition, since a separate hydraulic component must be used to flatten or deform the shape of the lifting ring to fit the diameter of the manhole frame, the work is difficult and requires a lot of time and effort for construction. It is of paramount importance to complete road repair work quickly and efficiently. Recently, due to the increase in vehicle traffic, there is a growing need for faster and more effective manhole cover lifting construction. Therefore, providing improved manhole cover lifting technology can offer many advantages to users. In particular, septic tanks are installed with the inflow pipes buried 50 centimeters underground from the ground surface, taking into account factors such as freezing depth, and standard septic tank manholes are produced with a height of 10 to 20 centimeters. Therefore, when construction is carried out on-site, 4M double-walled pipes or corrugated pipes are cut and lifted, and the rest is discarded, resulting in a significant loss of material. For this reason, the applicant has developed a method to enable installation by molding and producing a manhole suitable for septic tank specifications using waste materials. FIG. 1 is a block diagram showing the structure of the method for manufacturing a manhole lifting ring according to the present invention. FIG. 2 is a process diagram showing the structure of the method for manufacturing a manhole lifting ring according to the present invention. FIG. 3 is an exploded perspective view showing the structure of the manhole lifting ring of the present invention. FIG. 4 is a perspective view showing the structure of the manhole lifting ring of the present invention. FIG. 5 is an exploded perspective view showing the structure of another embodiment of the manhole lifting ring of the present invention. The following objects, other objects, features, and advantages of the present invention will be easily understood through the following preferred embodiments associated with the accompanying drawings. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. The embodiments introduced herein are provided to ensure that the disclosed content is thorough and complete, and to ensure that the spirit of the invention is sufficiently conveyed to those skilled in the art. The present invention comprises a waste vinyl receiving step (S10) in which discarded waste vinyl is collected, gathered, washed, and classified to separate foreign substances and receive the waste vinyl for making a molten material; a first melting step (S12) in which the received waste vinyl is placed into a melting device and a predetermined heat is applied to melt the waste vinyl and filter out impurities; a second melting step (S14) in which