KR200373188Y1 - Cast for invert of sewerage manhole - Google Patents

Abstract

The object of the present invention is to provide an invert forming formwork which is easy to manufacture and low in manufacturing cost, and can be easily manufactured in the field according to the manhole structure and can reduce the air, manpower, and construction cost required by construction. .

Accordingly, the present invention provides a form for forming an invert of a manhole including a mold having a circular cross-sectional shape in which both ends are inserted into an inlet pipe and an outlet pipe connected to a main body of the manhole, and a portion thereof is cut along the longitudinal direction.

Description

CAST FOR INVERT OF SEWERAGE MANHOLE

The present invention relates to an invert installed in the manhole, and more particularly to a form for forming an invert for constructing the invert.

In general, domestic sewage pipes are mostly joined-type sewerage to accommodate rainwater and sewage at once, and so far, many places have not installed inverts with disregard of the importance of inverts. If the invert is not installed in this way, the flow rate decreases in the manhole part and causes problems such as bad smell due to precipitation of solids and corrosion of sewage pipe due to hydrogen sulfide.In rainy weather, head loss due to rapid sharpening of the section This raises the water level in the upstream portion. In particular, local heavy rain, which has been frequently occurring since the 1990s, causes head loss of more than 10 cm in one manhole, which is the main cause of flooding in urban areas. Therefore, it is necessary to install the invert for the existing manhole which can achieve the most effect at the lowest cost among the various measures to prevent the flooding of the city.

That is, the invert is a bottom structure of the manhole which is installed for the purpose of preventing or preventing odor generated by sediment mixed with sewage introduced into the manhole and smoothing the flow of sewage. It consists of a block formed with a channel of a size corresponding to the lower half of the outlet pipe.

Therefore, the inflow pipe and the outflow pipe are smoothly connected in the manhole by the invert, so that the sewage can flow smoothly, and additionally, it is possible to reduce the hydraulic energy loss due to the rapid cross-sectional reduction of the inflow pipe and the outflow pipe. do.

1 schematically shows a manhole with an invert installed. According to the drawings, a typical manhole includes a main body 100 and an inlet pipe 110 and an outlet pipe 111 connected to the main body, and inside the manhole, an upstream inlet pipe 110 and a downstream outlet pipe ( Invert 120 is connected between the 111 to maintain the same flow rate of sewage to prevent solid decay and odor caused by precipitation of solids. The invert 120 is made to be the same as the diameter and inclination of the outflow pipe, the height is slightly different depending on the diameter, but is usually manufactured to 1/2 level of the diameter. And the upper foot portion 121 on both sides of the invert is inclined by 10 to 20% downward toward the inverted channel 122, so that when the sewage more than the height of the inverted 120 is introduced into the inverted channel 122. It is designed to flow down.

In order to install the inverted structure in the manhole, the form of a half-section form of a tube is usually formed at the bottom of the manhole, and the invert is formed of bare concrete, followed by mortar finishing. This conventional structure is a semi-circular formwork. This is very difficult, the cost and time is excessively put into the formwork, there is an inconvenience to remove the formwork after construction. Therefore, the invert construction requires a lot of manpower and time, so it is difficult to control the quality in the field, which causes air delay and increase of manhole construction cost.

Accordingly, the present invention has been made to solve the above problems, the object is to provide a form for forming an invert is simple to manufacture and low manufacturing cost.

In addition, the present invention has another object to provide a form for forming an invert that can be easily manufactured in the field according to the manhole structure and easy to install, thereby reducing the air or manpower and construction costs.

1 is a cross-sectional view showing a state in which the invert is generally installed in the manhole.

Figure 2 is a perspective view showing the configuration of the invert forming formwork according to an embodiment of the present invention.

Figure 3 is a perspective view showing the assembly state of the invert forming formwork according to an embodiment of the present invention.

4 and 5 are cross-sectional views showing a state in which the formwork is installed in the manhole according to an embodiment of the present invention.

6 is an exploded perspective view showing an invert forming die according to another embodiment of the present invention.

7 is a perspective view showing a form for forming an invert according to another embodiment of the present invention.

8A and 8B are views illustrating a form in which a formwork of another embodiment of the present invention is installed in a manhole.

9 is a view sequentially showing the assembly process of the formwork according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

10,20,30: die 11,21,31: mold

12,22,32: fixing member 13,23: groove

14,24: support plate 25,33: projection

34: guide line 40: support member

41: nut 42: screw shaft

In order to achieve the object as described above, the formwork of the present invention includes a mold having a circular cross-sectional shape in which both ends are inserted into the inlet and outlet pipes connected to the main body of the manhole, and a portion thereof is cut along the longitudinal direction.

Herein, the mold is not particularly limited as long as the material is light and has good workability. For example, the mold is preferably made of styrofoam.

In addition, the mold is preferably made of a size corresponding to the inner diameter of the inlet and outlet pipes to be in close contact with the inner peripheral surface of the inlet and outlet pipes.

In addition, the mold may be formed in a straight or curved form according to the position of the outlet and inlet pipe in the manhole. In the case where the mold has a curved shape, it is preferable to subdivide the curvature angle on the upper surface of the mold.

In addition, the mold may be made of a semi-circular cross-sectional structure according to the shape cut along the longitudinal direction or may have a cross-sectional structure having an area larger than a semi-circle, such as 2/3 round.

Here, since the invert has a semicircle shape, the protrusion may be formed along the length direction so that the semicircle position can be checked when placing the concrete at the outermost end of the mold in the width direction when the mold is formed in a cross-sectional structure larger than the semicircle. have.

On the other hand, the formwork of the present invention is formed in a form corresponding to the empty space between the oil, entry and exit pipe and the mold, in order to prevent the flow of the mold and is placed on the mold in the inlet and outlet pipes It may further include.

Therefore, the fixing member is inserted into the space between the mold and the oil and the entry pipe, thereby fixing both ends of the mold in the oil and the entrance pipe, thereby preventing the mold from flowing when the concrete is poured.

When the mold has a semi-circular cross-sectional structure, the fixing member also has a semi-circular cross-sectional structure. When the mold has a 2/3 circular cross-sectional structure, the fixing member has a 1/3 circular cross-sectional structure.

In addition, the present invention may further include a support plate placed on the upper surface of the mold to support the mold.

The support plate may be made of wood or steel or plastic of high strength as a weight of a rigid material.

Here, a groove having a size corresponding to the support plate may be further formed on the plane of the fixing member in contact with the mold so that the support plate may be fitted.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in detail.

First, referring to FIG. 1, the structure of the manhole includes a main body 100 and an inflow pipe 110 and an outflow pipe 111 connected to the main body, and an upstream inflow pipe 110 inside the manhole. Inverter 120 is installed between the downstream outlet pipe 111 and the invert is extended to the upper end of the inlet pipe, the upper end is formed with a semicircular cross-section channel connecting the outlet pipe and the outlet pipe of the manhole Both sides of the channel are inclined 10-20% downward toward the channel towards the top foot.

Looking at the form of the present invention for forming the invert 120 of the above form in the manhole as follows.

Figure 2 is a perspective view showing the configuration of the invert forming formwork according to an embodiment of the present invention, Figure 3 is a perspective view showing the assembled state of the invert forming formwork according to an embodiment of the present invention, Figures 4 and 5 Is a cross-sectional view showing the formwork is installed in the manhole according to an embodiment of the present invention.

In this embodiment, the inlet pipe 110 and the outlet pipe 111 are arranged in the main body 100 of the manhole at intervals of 180 degrees to explain the case where the invert 120 is formed in a straight shape.

According to the drawings, the formwork 10 according to the present embodiment has a semi-circular cross-sectional structure of both ends fitted into the inlet pipe 110 and the outlet pipe 111 connected to the main body 100 of the manhole and made of styrofoam material. The tip 11 of the mold 11 and the support plate 14 placed on the upper plane of the mold 11 to support the mold 11, the inlet pipe 110, and the mold 11 fitted to the entrance pipe; Fixed member 12 made of a semi-circular cross-sectional structure so as to correspond to the empty space between the inlet pipe 110 and the outlet pipe 111 and placed on the mold 11 in the inlet pipe 110 and the outlet pipe 111. ).

In the present embodiment, the mold 11 is made of styrofoam, but is not particularly limited thereto, and any material surface that can be easily processed into a light and various forms such as styrofoam will be applicable.

Here, styrofoam is composed of a styrene polymer or copolymer containing a blowing agent, and many descriptions thereof will be omitted.

In addition, the mold 11 has a structure in which both ends are in close contact with the inner circumferential surfaces of the inlet pipe 110 and the outlet pipe 111, respectively, having sizes corresponding to the inner diameters of the inlet pipe 110 and the outlet pipe 111. have.

Accordingly, when the mold 11 is simply inserted into the inlet pipe 110 and the outlet pipe 111 and the support plate 14 and the fixing member 12 are installed, the mold 11 in the main body 100 of the manhole is provided. When the mold itself serves as a formwork 10, the concrete is placed outside the mold 11, and the mold 11 is removed. The invert 120 easily matches the tubular shape of the oil and the access pipes 110 and 111. It will be able to manufacture.

Here, the invert 120 has a semicircular shape, which is ideal. As the mold 11 has a semicircular cross-sectional structure, the invert 120 casts concrete to a flat upper surface of the mold 11. The invert 120 having the above is simply manufactured.

In addition, the fixing member 12 is made of a semi-circular cross-sectional structure like the mold 11 and its length corresponds to the length of the tip portion of the mold 11 inserted into the inlet pipe 110 or the outlet pipe 111. In this way, the fixing member 12 may be located in the inlet pipe 110 or the outlet pipe 111.

Accordingly, the mold 11 is integrated with the fixing member 12 to form a single circular cross-sectional structure, and the size of the mold 11 is the same as the inner diameter of the inlet pipe 110 or the outlet pipe 111 so that the inlet pipe 110 or The outer surface of the mold 11 is to be in close contact with the inner peripheral surface of the outlet pipe (111).

In addition, as the support plate 14 is placed on the mold 11, the fixing member 12 contacting the mold 11 may interfere with the support plate 14, and the mold 11 may be prevented. On the plane of the fixing member 12 in contact with the groove 13 of the size corresponding to the support plate 14 is further formed.

The support plate 14 is formed of a thin plate having a length corresponding to the length of the mold 11 and placed on a plane of the mold 11 so that the mold 11 is lifted by the buoyancy of the concrete during the concrete pouring process. This prevents bending or bending.

The support plate 14 is not particularly limited as long as it is a weight of a rigid material, and is preferably made of wood or steel.

On the other hand, Figure 6 illustrates another embodiment of the present invention, in accordance with the above-described invert forming die 20 is both ends into the inlet pipe 110 and the outlet pipe 111 is connected to the body of the manhole. The mold 21 to be fitted is formed in a 2/3 circular cross-sectional structure, the support plate 24 is placed on the upper plane of the mold 21, and the mold inserted into the inlet pipe 110 and the entrance pipe ( A fixing member 22 having a 1 / 3-circular cross-sectional structure is fitted to each tip of the blade 21 to fix the mold 21.

In addition, the mold 21 has a structure in which the protrusions 25 protrude along the longitudinal direction at a position corresponding to a semicircle on the side, that is, a position corresponding to the outermost end in the width direction of the mold 21.

Therefore, from the outside, the operator can accurately know the height of the concrete placing through the visible confirmation of the projection 25 it is possible to construct an ideal invert of semi-circular shape.

And the fixing member 22 is made of a 1/3 circular cross-sectional structure and its length corresponds to the length of the tip portion of the mold 21 inserted into the inlet pipe 110 or outlet pipe 111, inlet pipe It may be located in the 110 or the outlet pipe (111).

The mold 21 of the 2/3 circular cross-sectional structure is combined with the fixing member 22 of the 1/3 circular cross-sectional structure to form one complete circular cross-sectional structure, and the size thereof is the inlet pipe 110 or the outlet pipe. The inner diameter of the (111) is to be able to closely contact the outer surface of the mold 21 to the inner peripheral surface of the inlet pipe 110 or outlet pipe (111).

The fixing member 21 is further provided with a groove 23 so that the support plates 14 and 24 are fitted on flat surfaces.

On the other hand, Figure 7 is another embodiment of the present invention, the inlet pipe 110 and the outlet pipe 111 installed in the main body 100 of the manhole does not lie in a straight line form the invert 120 of the curved shape The structure of the formwork 30 in the case which should be illustrated is illustrated.

According to the drawings, the mold 30 has a 2/3 circular cross-section mold in which a middle portion is curved in a curved shape so that both ends are fitted into the inlet pipe 110 and the outlet pipe 111 connected to the main body of the manhole ( 31) and a semi-circular cross-sectional structure so as to correspond to the front end of the mold 31 fitted to the inlet pipe 110 and the access pipe and the empty space between the inlet pipe 110 and the access pipe and the inlet pipe 110. ) And a fixing member 32 having a 1/3 circular cross-sectional structure, which is placed on the mold 31 in the outlet pipe 111, is placed on an upper plane of the mold 31 and fixed to an inner circumferential surface of the manhole body. And support means for supporting the mold 31.

Of course, the size of the mold 31 and the fixing member 32 is not limited thereto and may be formed in various sizes such as a semi-circular cross-sectional structure.

At the outermost end of the mold 31 in the width direction, a protrusion 33 for confirming the pouring height of the concrete is formed as mentioned.

In addition, the operator can easily check the curvature angle on the upper surface of the mold 31 to cut the mold 31 in accordance with the angle between the inlet pipe 110 and the outlet pipe 111 installed in the main body 100 of the manhole. The cutting guide lines 34, which are marked with angles, are subdivided at regular angles.

Therefore, the operator cuts the mold 31 according to the guide line corresponding to the corresponding angle among the cutting guide lines 34 shown on the upper surface of the mold 31 according to the connection angle of the inflow and outflow pipes 110 and 111 in the field, and the other part of the straight shape in the cut part. By attaching the mold with an adhesive or a tape or the like, one mold 31 that is curved at the same angle as the connection angles of the inflow and outflow pipes 110 and 111 can be easily manufactured and can be easily constructed using this mold.

And the support means is a support member 40 placed on the upper plane of the mold 31, as shown in Figure 8a and 8b, the nut 41 is rotatably installed on both ends of the support member 40 The screw shaft 42 is fastened to each of the nuts 41 to be installed in the support member 40, and the outer end thereof extends to contact the inner wall of the main body 100 of the manhole.

Accordingly, in a state in which the support member 40 is in close contact with the upper surface of the mold 11, both the nuts 41 are rotated to advance the screw shaft 42 to the inner wall of the main body 100, and the screw shaft 42 is pressed against the inner wall. The support member 40 fixed to the inner wall of the main body supports the upper surface of the mold 31 to prevent the mold from flowing upward.

Accordingly, the mold 31 and the fixing member 32 are inserted into the inlet pipe 110 and the outlet pipe 111 of the main body, and the support member 40 is fixed to the wall to support the mold 31. When the concrete is poured out of the mold 31, the mold 31 of the styrofoam material floats on the concrete due to buoyancy, but the support member fixed to the inner wall of the main body 100 through the screw shaft 42 as described above. 40 depresses the mold 31 from above, so that the mold 31 does not rise up. Accordingly, it is possible to prevent the separation and breakage of the mold 31.

Hereinafter, the operation of the formwork and the construction process of the invert using the formwork according to the embodiment of the present invention is as follows.

In the following description, a straight invert 120 is formed by using a mold 11 having a semi-circular cross-sectional structure with reference to FIG. 9 as an example, and reference numerals not shown in each drawing refer to reference numerals described above. do.

First, the mold 11 is introduced into the body of the manhole, and both ends of the mold 11 are inserted into the inlet pipe 110 and the outlet pipe 111 connected to the body, respectively, so that the inlet pipe 110 and the outlet pipe ( The mold 11 is placed between the 111.

Here, the mold 11 is formed in a semi-circular cross-sectional structure so that a flat outer surface is disposed between the inflow pipe 110 and the outflow pipe 111 so that the rounded outer surface is the inflow pipe 110 and the outflow pipe 111. ) It is in contact with the inner peripheral surface.

In this state, the support plate 14 is placed on the flat upper surface of the mold 11 in the longitudinal direction.

Then, the fixing member 12 having a semi-circular cross-sectional structure is opposed to the mold 11 so that the flat surfaces of the fixing member 12 and the mold 11 are in contact with each other, and the fixing member 12 is placed on the upper surface of the mold 11. ) Is moved into the inlet pipe 110 and the outlet pipe 111, respectively, so that the fixing member 12 is fitted into the space between the inlet pipe 110 or the outlet pipe 111 and the mold 11 while being fitted. The upper end of the mold 11 is supported.

As such, when the mold 11 is fixed between the inlet pipe 110 and the outlet pipe 111 by the fixing member 12 and the support plate 14, the concrete 11 is molded between the mold 11 and the inner wall of the main body. After pouring to the top of the concrete and the concrete is cured by removing the mold 11, the fixing member 12 and the support plate 14 it is possible to form the invert 120 in the body.

Here, the mold 11 and the fixing member 12 are made of styrofoam, so that the mold 11 and the fixing member 12 can be easily removed from the invert 120.

The present invention can be seen that provides a form for forming an invert is fairly easy to construct as described above. While exemplary embodiments of the present invention have been shown and described, various modifications and other embodiments may be made by those skilled in the art. Such modifications and other embodiments are all considered and included in the appended claims, without departing from the true spirit and scope of the present invention.

According to the inverted formwork of the manhole according to the present invention as described above, it is possible to make a lightweight and cheap inverted formwork using styrofoam, which is very inexpensive to manufacture and economical compared to metal, wood, plastic formwork, and skilled It does not require the production and installation of circular formwork, which requires woodworking technicians, and the dismantling process.

In addition, as it is manufactured using styrofoam, formwork of various angles can be easily made, and according to various connection angles of oil and entry pipes existing according to the site, formwork is made in accordance with the connection angles of oil and entry pipes directly at the site. It is possible to cut and construct the structure so that it is very applicable to the field.

In addition, the formwork is light and the structure is simple, so that the worker can be easily installed in the narrow manhole alone.

Claims (9)

Both ends are inserted into the inlet and outlet pipes connected to the main body of the manhole, a part for forming the invert of the manhole comprising a mold having a circular cross-sectional structure forming a plane by cutting a portion along the longitudinal direction. The method of claim 1, further comprising a fixing member formed in a shape corresponding to the empty space between the oil and the entry pipe and the mold, and fitted between the mold and the oil and the entry pipe in the inlet and outlet pipes. Forming die for inverting the manhole, characterized in that. 3. The inverting formwork for manhole according to claim 1 or 2 further comprising a support plate placed on an upper plane of the mold to support the mold. 2. The formwork for forming an invert of a manhole according to claim 1, wherein the mold is made of styrofoam. According to claim 1 or 2, wherein the mold is curved according to the position of the oil, the entrance and exit pipe to form a curved surface, characterized in that the upper cutting guide line is formed by subdividing the curvature angle of the curved surface Forming dies for inverting manholes. According to claim 1 or 2, wherein the mold is inverted formwork for forming the manhole, characterized in that the cross-sectional structure of a semi-circle or larger size according to the cut shape. 7. The mold for inverting a manhole according to claim 6, wherein the mold has a cross-sectional structure of a size larger than a semicircle, and protrusions are formed along the length direction at the outermost end in the width direction of the mold. 4. The inverting die for manhole according to claim 3, wherein a groove having a size corresponding to the support plate is formed on a plane of the fixing member in contact with the mold. 3. The support member according to claim 1 or 2, further comprising: a support member placed on the upper plane of the mold, a nut rotatably installed at both ends of the support member, and fastened to the respective nuts so as to move into the support member. And a support means for preventing the flow of the mold, including a screw shaft extending outwardly and having an outer end extending in contact with the inner wall of the main body of the manhole.