KR200342690Y1 - Fabricable Precast Invert for Sewerage Manhole - Google Patents

Abstract

The object of the present invention is to provide a manhole assembly inverted to prevent the construction complexity by the semi-circular formwork and to reduce the air, manpower and construction costs required to make the construction on the site easily.

In this invention, the invert is installed on the bottom of the manhole connecting the inlet pipe and the outlet pipe, the invert is made of a semi-circular cross-sectional structure is placed between the connecting member and the connector in contact with the inlet and outlet pipe of the manhole inlet pipe Including a semi-circular cross-section of the straight body connecting the outlet pipe and provides a prefabricated invert of the manhole, characterized in that the assembly is assembled with the straight body.

Description

Fabricable Precast Invert for Sewerage Manhole}

The present invention relates to an invert installed in the manhole, and more particularly, to a prefabricated invert that can be easily installed.

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.

Further, the width of the invert extends the same width to the upstream of the downstream side, and the step between the upstream pipe and the bottom of the invert ensures about 3-10 cm.

In order to install the invert of the above structure in the manhole, the form of the half-section form of the tube is usually formed by forming the invert from bare concrete and then mortar finish, such a conventional structure is a cost and time to manufacture a circular formwork There is a problem in that the excessive input, the inconvenience of removing the formwork, the mortar finish is not integral with the sphere and easily peeled off, resulting in the increase of the roughness coefficient, thereby impairing the original function of the invert.

In addition, it is practically difficult to manufacture semi-circular formwork, and the wooden formwork is weak due to buoyancy when concrete is poured.In addition, it requires a lot of manpower and time for mortar finishing, so it is difficult to control quality in the field and delay air and manhole construction cost. Causes a rise.

In addition, the construction structure of the conventional formwork has the inconvenience of blocking the flow of sewage or draining water when the invert is installed in the existing manhole where the invert is not installed. Of course, it requires a lot of additional expenses by operating the pump.

Therefore, the present invention was conceived to solve the above problems, and can be easily installed in the field to prevent construction complexity due to the semi-circular formwork and to reduce the air, manpower and construction costs required for manufacturing The purpose is to provide a prefabricated invert of.

In addition, the present invention has another object to provide a prefabricated inverted manhole to increase the roughness coefficient and construction quality while omitting the mortar finish for maintaining the roughness coefficient.

In addition, the present invention has another object to provide a prefabricated inverted manhole that can be used semi-permanently without being peeled off by the flow of sewage after the passage, or corrosion of hydrogen sulfide and sulfuric acid generated in the sewage.

In addition, the present invention has another object to provide a prefabricated invert of the manhole so as not to block or obstruct the flow of sewage when installed in the existing manhole.

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

Figure 2 is a block diagram showing the assembled invert according to the embodiment of the present invention according to the aperture,

3 is a plan view showing the assembled state in the manhole of the prefabricated invert according to the embodiment of the present invention,

Figure 4 is a detailed view showing a fixed state in the manhole of the assembled inverted in a straight portion according to an embodiment of the present invention,

5 is a detailed view showing a fixed state in the manhole of the assembled inverted in the curved portion according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

10: connecting body 11: straight body

12: rib 13: flange face

20: rootless concrete 30: fixed bracket

31: Nut 32: Tightening Bolt

33: elastic spring 40, 41: support rod

42: turnbuckle 43: hold

44: Bolt

In order to achieve the object as described above, the subject innovation is to make the inverted main body of the semi-tubular shape in advance according to the standard, and to install in the manhole.

To this end, the assembled invert of the present invention has a semicircular cross-sectional structure and includes a connecting body contacting the inlet and outlet pipes of the manhole and a straight body of a semi-circular cross-sectional structure placed between the connecting bodies and connecting the inlet and outlet pipes.

In addition, the present invention includes a rootless concrete filled in the space formed by the connecting body, the straight body and the manhole.

In addition, the present invention may further include a fixing means for fixing the connecting body and the straight body in the manhole.

Accordingly, the connecting body and the straight body are fixedly installed in the manhole by means of fixing means, thereby forming an inverted channel connecting the inflow pipe and the outflow pipe, and the concrete is filled between the manhole, the connecting body, and the straight body, thereby forming a separate formwork. Invert can be installed immediately without use.

In this case, the connecting body and the straight body are preferably made of a plastic material so as to prevent corrosion by hydrogen sulfide or sulfuric acid and reduce its weight.

In addition, the linear body may be separated into a plurality of interconnections. This structure is necessary for large size inverted construction to easily enter the straight body through the upper inlet of the manhole.

In addition, the connecting body and the straight body has a plurality of reinforcing ribs are installed in the longitudinal direction and / and the width direction on the rear to reinforce the strength.

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

1 is a cross-sectional view showing a state in which the invert is generally installed in the manhole, Figure 2 is a block diagram showing the assembled invert according to the embodiment of the present invention according to the aperture, Figure 3 according to an embodiment of the present invention It is a top view which shows the assembly state in the manhole of the prefabricated invert according to diameter.

According to the above drawings, the manhole includes a main body 100 and an inlet pipe 110 and an outlet pipe 111 connected to the main body, and an upstream inlet pipe 110 and a downstream outlet pipe 111 inside the manhole. Invert 120 is installed between the), the invert is extended to the upper end of the inlet pipe, the upper end is formed with a semi-circular cross-section of the channel connecting the outlet pipe and the outlet pipe of the manhole and both sides of the channel The footsteps are slanted 10-20% down the channel.

The invert according to the present invention is made of a semi-circular cross-sectional structure is placed between the connector 10 and the connector 10 in contact with the inlet pipe 110 and the outlet pipe 111 of the manhole, the inlet pipe 110 and the outlet Straight body 11 of semi-circular cross-sectional structure connecting the pipe 111, fixing means for fixing the connecting body 10 and the straight body 11 in the manhole, the connecting body 10 and the linear body 11 And the rootless concrete 20 filled in the space formed by the manhole.

Therefore, the connecting body 10 and the straight body 11 are assembled as one to serve as a channel of the invert, and the rootless concrete 20 is filled up to the top of the straight body 11 to fix the invert and the upper part serves as a stepping foot. Will be performed.

In addition, the connecting body 10 and the straight body 11 is preferably manufactured by injection molding a plastic material having light weight and corrosion resistance such as sulfuric acid.

The outer surface of the connecting body 10 is connected to the inlet pipe 110 or the outlet pipe 111 is in contact with the inner circumferential surface of the cylindrical manhole body 100 is formed to be curved in the same manner as the inner diameter of the body and the inner surface has a straight shape Achieve.

In addition, the straight body 11 has a structure in which both ends thereof are in a straight line shape and contact the connecting body 10.

On the other hand, the connecting body 10 and the straight body 11 has a structure in which a plurality of reinforcing ribs 12 are formed in the longitudinal direction and / or the width direction on the rear surface thereof.

The structure of the straight body 11 may vary depending on the size of the manhole, each embodiment being well illustrated in FIGS. 2 and 3.

Example 1

In the case where the sewage pipe is small diameter (500 mm or less), the straight body 11 may be formed of a single body, considering that the inlet diameter of the manhole is normally standardized to 600 mm or 700 mm.

In this case, since the straight body 11 can be sufficiently entered through the entrance of the manhole, one straight body 11 can be entered into the interior of the manhole through the entrance of the manhole to construct the invert.

Example 2

When the sewer pipe is medium-diameter (600-800 mm), it is impossible to enter the straight body 11 through the inlet of the manhole into the manhole. Accordingly, the straight body 11 is divided into two in the longitudinal direction and divided into two. It is.

Each separated straight body 11 is formed so that the flange surface 13 is in contact with each other in the central portion during construction to be fixed by a fastening chain or bolts.

Accordingly, the two straight bodies 11 separated are reduced to 400 mm or less in width so that they can sufficiently pass through the entrance of a conventional manhole.

Example 3

If the sewage pipe is a large diameter (900-1400mm) it is impossible to enter the straight body 11 through the inlet of the manhole as described above, and thus the straight body 11 is divided into four in the longitudinal direction divided into four It is.

Each separated straight body 11 has a flange surface 13 is formed so that the sides are in contact with each other to be fixed by a fastening chain or bolts.

Of course, the division structure of the straight body 11 described above is presented as an example, and the present invention is not limited thereto, and the straight body 11 having various shapes and structures according to the size of the manhole may be used as the invert configuration. And all these transformable examples will also belong to the true spirit of the present invention.

Meanwhile, as shown in FIGS. 4 and 5, the fixing means is used to fix the connecting body 10 or the straight body 11 to the manhole in advance, which is made of a light plastic material. And to prevent the straight body 11 from floating with respect to the rootless concrete 20.

4 illustrates the case of the manhole in which the inflow pipe 110 and the outflow pipe 111 are located in a straight line. In this case, the fixing means at both ends of the connection body 10 connected to the straight body 11 is provided. Is mounted to fix the connector 10 to the inner circumferential surface of the main body 100, for this purpose, a fixing bracket 30 is installed at the end of the connector 10, the nut 31 installed in the fixing bracket 30 Tightening bolt 32 is provided in the longitudinal direction through the structure.

Therefore, when the tightening bolt 32 is rotated, the tightening bolt 32 is advanced to the outside with respect to the nut 31 installed on the fixing bracket 30, and the tightening bolt 32 is pressed against the inner wall of the main body 100 of the manhole. The sieve 10 is supported.

Here, according to the sewage facility standard, the step processing of the upstream portion of the invert is prescribed. Therefore, it is preferable to preliminarily fix the connecting body 10 before the fixing so that the step of the invert can be more easily given. . To this end, the fixing means is inserted into the tightening bolt 32 is further added to the elastic spring 33 is elastically installed between the fixing bracket 30 and the nut 31.

Accordingly, when the operator pulls the tightening bolt 32 fastened to the nut 31 inward or releases it, the nut 31 is pushed outward by the elastic force of the elastic spring 33 and tightened to the nut 31. The bolt 32 is pressed against the inner wall of the main body 100 to support the connector 10. Therefore, even in a narrow space in the manhole, one worker can fully perform the invert construction.

In addition, Figure 5 illustrates the fixing means in the case in which the inlet pipe 110 and the outlet pipe 111 facing in a different direction, in which case the fixing means is the inlet pipe 110 and the outlet pipe 111. The outer curved surface of the straight body 11 that is curved in the direction is fixed to the wall structure, for this purpose, one end is in contact with the connecting body 10 or the straight body 11 and the other end is formed with the right hand screw inner support A turnbuckle which is in contact with the rod 40 and the inner wall of the other manhole body 100 and the other end is joined to the outer and outer support rods 41 formed with a left screw, and the right and left threads of each of the support rods 40 and 41. turnbucle;

Accordingly, when the turnbuckle is turned in one direction, the inner support rod 40 and the outer support rod 41 are pushed outward of the convertible to fix the connecting body 10 or the straight body 11 to the manhole.

Preferably, the front end of the inner support rod 40 is fitted to the ribs of the connecting body 10 or the straight body 11 so that the front end of the holding body 43 can be fixed to the connecting body 10 or the straight body 11. And an inner support rod 40, a turnbuckle 42 and an outer support rod 41 connected thereto, further including a bolt 44 which fixes the hold to the rib 12 through a fastening hole formed in the hold 43. To prevent them from falling off.

Hereinafter, the process of installing the invert in the manhole according to the present invention.

First, the worker carries in the manhole through the entrance of the manhole the connector 10 and the straight body 11, which is prefabricated according to the size of the manhole to be constructed and forms the channel of the invert.

In addition, the worker assembles the connection body 10 and the straight body 11 in the manhole, and is positioned between the inflow path and the outflow path and fixed to the inner wall of the manhole body 100.

A preferred process for fixing the connecting body 10 and the straight body 11 is as follows. That is, when the turnbuckle rotates, the inner support rod and the outer support rod extend outward to extend the overall length to support the connecting body 10 and the straight body 11 between the walls.

In this state, the connecting body 10 and the straight body 11 are leveled, and the inner surface of the outflow pipe 111 of the waterway is made to coincide using a downstream tightening bolt or a turnbuckle. In the same process, using the fastening bolt or turnbuckle located on the upstream side, adjust the height of the upstream side of the channel according to the step required for each manhole.

Tighten the upper and downstream tightening bolts or turnbuckles to the maximum to secure the connecting body 10 and the straight body 11 forming the inverted channel to the inner wall of the manhole.

On the other hand, when the connecting body 10 and the straight body 11 constituting the channel of the invert in the manhole as described above is filled with the plain concrete 20 in the bottom of the manhole through the space between the inner wall and the waterway of the manhole and the plain concrete 20 ) Is completed when the connecting body 10 and the top of the straight body 11 is filled to finish the installation of the invert.

It can be seen that the present invention provides an invert that is quite 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 assembled invert of the manhole according to the present invention as described above,

First, it does not require the production and installation of circular formwork, which requires skilled woodworking technicians, and the dismantling process.

Second, unlike the conventional construction method, it does not require a mortar finish after curing the concrete can reduce the manpower. In addition, the mortar finish in the conventional construction can be done after the curing period (28 days) after the inverted concrete pouring, but long-term air is required, but the invert of the present invention is finished by the installation of the main body itself and concrete pouring It is not necessary to drastically reduce air.

Third, the finish of the inner surface of the invert due to the mortar may be peeled off by the flow of sewage after passing through it, or may be eroded by hydrogen sulfide and sulfuric acid generated in the sewage, so that the invert roughness coefficient may increase, thereby losing the purpose of the invert part. Inverter of the present invention, there is no risk of peeling, by selecting the material of the plastic system resistant to corrosion, it is possible to permanently maintain the inner side of the invert permanently.

Fourth, in the case of invert construction by formwork, it is difficult to block or turn the sewage in order to form an invert in the existing sewage manhole, but the invert of the present invention does not block or hinder the flow of sewage. Easy and simple application to manholes.

Fifth, the entrance of the existing manhole is mostly narrow to 600㎜, but it can be installed regardless of the size of the manhole, so that the existing manhole can be installed without damage.

Sixth, it can be easily mounted on the desired position by yourself when installing the invert, in particular, the upstream portion can be precisely stepped construction according to the manhole shape.

Claims (6)

In the invert is installed on the bottom of the manhole connecting the inlet and outlet, The invert is composed of a semi-circular cross-sectional structure comprising a connecting body in contact with the inlet and outlet pipes of the manhole and a straight body of a semi-circular cross-sectional structure between the connecting body and connecting the inlet and outlet pipes, Assembled inverted manhole, characterized in that the construction. The inverting assembly of a manhole according to claim 1, wherein the linear body is divided into a plurality of straight bodies. According to claim 1, wherein the invert is inverted prefabricated inverter of the manhole characterized in that it further comprises a rootless concrete is filled in the space formed between the connecting body, the straight body and the manhole. 4. The manhole according to any one of claims 1 to 3, wherein in the case of the manhole in which the inflow pipe and the outflow pipe are located in a straight line, a fixing bracket provided at the end of the connecting member, a nut provided on the fixing bracket, And a fastening bolt fastened to a nut and pressed against an inner wall of the body of the manhole, and further comprising fixing means for fixing the connecting body and the straight body in the manhole. According to claim 4, Man-shaped inverted inverter is characterized in that it further comprises an elastic spring is inserted into the tightening bolt and elastically installed between the fixing bracket and the nut. The outer support rod according to any one of claims 1 to 3, wherein one end is in contact with a connecting body or a straight body and the other end is formed with a right hand thread, and the other end is in contact with an inner wall of the manhole and the other end is formed with a left hand thread. Including the turnbuckle is coupled to both ends of the right hand thread and the left hand thread of each of the supporting rod, the assembly of the manhole of the manhole characterized in that it further comprises a fixing means for fixing the connecting body and the straight body in the manhole.