JPH0673777A - Built-up type invert - Google Patents

Abstract

PURPOSE:To form a guide path by installing a discoid main body having a columnar projection at a center to a bottom in a box body, to which an inflow pipe and an outflow pipe are connected, while arranging an outer circumferential block onto the outer circumferential section of the main body as being separated from a projection section. CONSTITUTION:An inflow pipe 1 and an outflow pipe 2 are connected to the box body 3 of a manhole, and the box body 3 is born onto a floor slab 5. A main body 6 is mounted onto a floor slab 5 under the state, in which a grade in the direction of the arrow 7 is directed toward the opening section of the pipe 2. A plurality of outer circumferential blocks 8a, 8b are installed onto the outer circumferential section of the top face of a base section 6b between mutual pipe 1 and pipe 2 while being separated from a columnar projection section 6a. Two flow path stoppers 10 are mounted on the opposed side of the blocks 8a, 8b, and the clearances and joints of each section are filled with motar 13. A fluid is fluidized smoothly from the pipe 1 to the pipe 2 without generating a turbulent flow through guide paths among the projection 6a and the blocks 8a, 8b. Accordingly, a built-up type invert can correspond to the arbitrary diameter of the pipe and the arbitrary position of connection, and can be carried out easily, and cost can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an assembly type invert, and particularly to a manhole for checking and maintaining sewerage or a bottom of a sewage basin, to which fluid such as sewage flowing from an inflow pipe into the manhole or sewage basin is supplied. The present invention relates to a prefabricated invert forming a guide path leading to a connected outflow pipe.

[0002]

2. Description of the Related Art At the bottom of a manhole or sewage basin, there is formed a guide passage for smoothly guiding a fluid such as sewage flowing from an inflow pipe to an outflow pipe connected to the fluid. This guideway has conventionally been constructed by placing mortar on the bottom of the housing such as a manhole or sewage basin, and adjusting this mortar according to the connection angle and pipe diameter of the inflow and outflow pipes and using a trowel, etc. Had been formed.

Further, in recent years, a taxiway block in which a taxiway is precast is installed at the bottom of the housing, so that the taxiway can be installed in the housing without manual work on site.

[0004]

However, at the installation site of a manhole or the like, when a guideway is formed by manually molding mortar at the bottom of the housing, the scaffolding cannot be freely secured in the housing. However, due to the poor working environment, it took a long time to manufacture the taxiway, and the work efficiency was low.

When a precast guideway block in which a guideway is formed in advance is installed at the bottom of the inside of the housing, the precasting is performed in accordance with the connection angle and the diameter of the pipe connected to the housing such as a manhole. It is necessary to mold the guideway block after creating a mold for use, and since the connection angle and pipe diameter of the connecting pipe differ depending on the installation site such as the manhole, manufacture the formwork for each site. It is necessary to increase the cost of manufacturing the mold, and it takes time to manufacture the mold, which is an obstacle to shortening the construction period.

An object of the present invention is to provide a general-purpose guideway that can easily install a guideway in the bottom of the casing such as a manhole, regardless of the difference in the connection angle and pipe diameter of the connection pipes connected to a manhole, a sewage basin, or the like. It is to provide a prefabricated assembly type invert.

[0007]

SUMMARY OF THE INVENTION The above-mentioned object is to provide a guide path which is assembled and installed in a bottom portion of a housing to which an inflow pipe and an outflow pipe are connected, and which guides a fluid flowing from the inflow pipe into the housing to the outflow pipe. In the assembly type invert forming the above, the columnar projecting portion protruding upward in the central portion and the base portion protruding laterally from the lower end portion of the columnar projecting portion are installed on the inner bottom portion of the housing. A main body and an outer peripheral block provided on an outer peripheral surface of an upper surface of the base portion so as to be spaced apart from the columnar protrusion portion, and the guide path is formed between the columnar protrusion portion and the outer peripheral block. This is achieved by a prefabricated invert.

[0008]

According to the present invention, by changing the installation position and the number of outer peripheral blocks in the circumferential direction, regardless of the connecting position or the pipe diameter of the pipe connected to the casing such as the manhole, It is possible to form a guide path for guiding the fluid flowing into the housing to the outflow pipe at the bottom of the housing.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A prefabricated invert according to a first embodiment of the present invention will be described with reference to FIGS. Figure 1 (A)
It is a partial cross-section top view of the manhole bottom to which the assembling-type invert of this embodiment is applied, and the same figure (B) is B of (A).
-B is a vertical cross-sectional view. In this embodiment, one inflow pipe 1 and one outflow pipe 2 are arranged in a straight line with a manhole in between and connected to a casing 3 of the manhole. The lower surface of the cylindrical housing 3 is in contact with the upper surface of the floor board 5, and is supported by the floor board 5. At the inner bottom portion of the housing 3, a main body 6 of the assembled invert according to the present embodiment is installed on the floor board 5.

The main body 6 has a columnar protrusion 6a protruding upward at the center and a base 6b protruding laterally from the lower end of the columnar protrusion 6a. The columnar protrusion 6a has a columnar shape, and the lower side surface of the columnar protrusion 6a is connected to the upper surface of the base 6b by a smooth curved surface. The thickness dimension of the base portion 6b in the circumferential direction is largest in the portion close to the inflow pipe 1 and smallest in the portion close to the outflow pipe 2. An arrow 7 is displayed on the upper surface of the columnar protrusion 6a in order to display the portion having the smallest thickness dimension. Therefore, if the main body 6 is installed on the floor 5 installed horizontally with the arrow 7 pointing toward the opening of the outflow pipe 2, the upper surface of the base portion 6b has a downward slope toward the opening of the outflow pipe 2. I will have.

A plurality of outer peripheral blocks 8a, 8b are provided on the outer peripheral portion of the upper surface of the base portion 6b between the inflow pipe 1 and the outflow pipe 2 so as to be separated from the columnar protrusion 6a. As a result, a guide passage having a U-shaped cross section is formed between the outer peripheral block 8 and the columnar protrusion 6a to guide the fluid such as dirty water flowing from the inflow pipe 1 to the outflow pipe 2. As described above, since the upper surface of the base portion 6a has a downward slope toward the opening of the outflow pipe 2, the guide path also has a downward slope toward the opening of the outflow pipe 2. Therefore, the fluid flowing from the inflow pipe 1 is smoothly guided to the outflow pipe 2 by the guide passage.

Further, the fluid flowing from the inflow pipe 1 is located on the side where the outer peripheral block 8 is not installed, that is, in FIG.
In (A), the two flow path stoppers 10 are respectively provided in the housing 3 in order to prevent the columnar projections 6a from flowing out.
And the inner surface, the outer surface of the columnar protrusion 6a, and the upper surface of the base 6b. Side surface 10 of flow path stopper 10
a is a concave curved surface that is in contact with the outer peripheral surface of the columnar protrusion 6a on the inner side and is in contact with the normal line of the inner wall of the housing 3 on the outer side.

By providing such a flow path stopper 10 to regulate the flow direction of the fluid, it is possible to prevent the flow of the fluid from branching and to prevent the fluid from flowing without causing turbulence. The flow direction can be changed smoothly,
The scavenging action of the fluid can be efficiently utilized. The gaps and joints formed between the housing 3, the main body 6, the outer peripheral blocks 8a and 8b, the flow path stopper 10, and the like are filled with mortar 13 as a filler, and the accumulation of dirt and dust contained in the fluid. , Precipitation is prevented.

FIG. 2 is a diagram showing the above-mentioned main body 6, FIG. 3 is a diagram showing the outer peripheral block 8a, FIG. 4 is a diagram showing the outer peripheral block 8b, and FIG. As is apparent from these figures, positioning projections 11 are formed on the lower surfaces of the outer peripheral blocks 8a and 8b and the flow path stopper 10, respectively. Correspondingly, the projections 11 are formed on the base portion of the main body 6. An annular groove 6c to be inserted is formed.

As described above, the projections 11 are formed on the outer peripheral blocks 8a and 8b and the flow path stopper 10, and the annular groove 6c is formed on the main body 6.
By forming the precast factory and the product storage area of the precast products, the main body 6, the outer peripheral blocks 8a and 8b, and the flow path stopper 10 are used as data of the pipe connection position and the pipe diameter dimension at the manhole installation site. It is possible to temporarily assemble based on this, and when it is transported to the site in the state of being temporarily assembled, it is possible to prevent the temporarily assembled ones from becoming disjointed or the relative positional relationship from breaking due to vibration during transportation. Is preferable.

Also in the field, the temporarily assembled one is installed as it is on the bottom of the housing 3, and the gap between the outer peripheral blocks 8a and 8b and the flow path stopper are adjusted according to the actual connecting position of the pipe and the pipe diameter dimension. By finely adjusting the installation position of 10 in the circumferential direction, it is possible to easily obtain a guide path that matches the actual pipe position and pipe diameter dimension. Then, the annular groove 6c and the flow path stopper 1 exposed on the upper surface of the base portion 6b.
The space surrounded by 0 can be filled with the mortar 13 to fix the outer peripheral blocks 8a and 8b and the flow path stopper 10 at that position, and the positional displacement of these after the construction is prevented. After that, mortar 1 on the other required places
3 is filled and the construction is completed.

As described above, according to this embodiment, it is only necessary to change the installation position and the number of the outer peripheral blocks in the circumferential direction.
Regardless of the connection position of the pipe connected to the casing such as a manhole or the pipe diameter, it is possible to easily form a guide path at the bottom of the casing for guiding the fluid flowing from the inflow pipe into the casing to the outflow pipe. it can. The protrusion 11 and the annular groove 6c described above may not be formed. A guide path can be formed by assembling the outer peripheral blocks 8a and 8b and the flow path stopper 10 to the main body 6.

Further, for the convenience of suspending the temporarily assembled one on the bottom of the housing 3, it is desirable to put a resin nut 12 in the upper surface of the columnar projection 6a when pre-casting the main body 6. . Then, after the installation of the main body 6, if the portion where the nut is embedded is filled with the mortar 13, since the nut is made of resin, there is no spring rust and there is no problem.

Next, the assembly type invert according to the second embodiment of the present invention will be described with reference to FIG. The same components as those of the first embodiment shown in FIGS. 1 to 5 are designated by the same reference numerals and the description thereof will be omitted. The assembly-type invert according to this embodiment is different from the first embodiment shown in FIG. 1 in that the present invention is applied to a manhole to which two inflow pipes 1 and one outflow pipe 2 are connected. The connection position and direction of each tube are different from those in the first embodiment. Further, in the present embodiment, the base portion 6b between the inflow pipe 1 and the outflow pipe 2 which are adjacent to each other.
Not only the outer peripheral blocks 8a and 8b are installed on the outer peripheral surface of the upper surface, but also the outer peripheral blocks 8a and 8b are installed on the outer peripheral surface of the upper surface of the base portion 6b between the two inflow pipes 1. A guide path for guiding the fluid flowing from each inflow pipe 1 to the outflow pipe 2 is formed between the columnar protrusions 6a.

As described above, according to this embodiment, even if the number of pipes to be connected is increased, the pipes connected to the casing such as the manhole can be simply changed by changing the installation positions and the numbers of the outer peripheral blocks in the circumferential direction. Regardless of the connecting position and the pipe diameter, the guide path for guiding the fluid flowing from the inflow pipe into the housing to the outflow pipe can be easily formed in the bottom of the housing. The present invention is not limited to the above embodiment, and various modifications can be made.

In each of the above-described embodiments, the flow path stopper 10 is installed, but when the number of pipes connected to the manhole increases, the space for installing the flow path stopper 10 may be lost. In this case, it is not necessary to intentionally install the flow path stopper. Further, in the above-described embodiment, the guide path having a U-shaped cross section is formed, but the cross section of the formed guide path may be V-shaped.

[0022]

As described above, according to the present invention, the connecting position and the pipe diameter size of the pipe connected to the casing such as the manhole can be adjusted only by changing the installation position and the number of the outer peripheral blocks in the circumferential direction. Regardless, it becomes possible to form a guide path for guiding the fluid flowing from the inflow pipe into the housing to the outflow pipe at the bottom of the housing. In this way, since it has high versatility, it is possible to make a large amount of prospective production, and for this reason, a precast mold is created every time the connecting position of the inflow pipe and the outflow pipe and the pipe diameter size are different. Unlike the conventional method, it is possible to significantly reduce the cost for forming the formwork.

In the assembly type invert according to the present invention, the constituent parts such as the main body and the outer peripheral block can be precast, and can be installed in the bottom portion of the manhole or the like in a temporarily assembled state. Work effort can be reduced and work efficiency is improved. Furthermore, since no skill is required to construct the taxiway, it is possible to quickly and safely form the taxiway in the manhole or the like even if not a skilled worker.

Incidentally, in recent years, a self-propelled camera is inserted from a manhole into the pipeline to inspect the pipeline. In this case, a sufficient space for inserting the self-propelled camera is required in front of the opening of the pipe connected to the manhole. However, according to the present invention, it is possible to form the space so as to take sufficient space. , You can easily insert the self-propelled camera into the pipeline.

[Brief description of drawings]

FIG. 1 is a view showing a prefabricated invert according to a first embodiment of the present invention, FIG.
(B) is a BB vertical sectional view of (A).

2A and 2B are views showing a main body forming the assembled invert shown in FIG. 1, in which FIG. 2A is a plan view thereof and FIG. 2B is a longitudinal sectional view thereof.

3A and 3B are views showing an outer peripheral block forming the assembled invert shown in FIG. 1, in which FIG. 3A is a plan view thereof, FIG. 3B is a side view thereof, and FIG. 3C is a perspective view thereof.

4A and 4B are views showing an outer peripheral block different from the outer peripheral block of FIG. 3, in which FIG. 4A is its plan view, FIG. 4B is its side view, and FIG. 4C is its perspective view.

5A and 5B are views showing a flow path stopper constituting the assembled invert shown in FIG. 1, in which FIG. 5A is a plan view thereof, FIG. 5B is a side view thereof, and FIG.

FIG. 6 is a view showing an assembling-type invert according to a second embodiment of the present invention, FIG.
(B) is a BB vertical sectional view of (A).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Inflow pipe 2 ... Outflow pipe 3 ... Casing 5 ... Floor 6 ... Main body 6a ... Columnar protrusion 6b ... Base 6c ... Annular groove 7 ... Arrow 8a ... Outer peripheral block 8b ... Outer peripheral block 10 ... Flow path stopper 11 ... Protrusion 12 ... Nut 13 ... Mortar

Claims (4)

[Claims] 1. A prefabricated invert which is assembled and installed at a bottom portion of a housing to which an inflow pipe and an outflow pipe are connected and which forms a guide path for guiding a fluid flowing from the inflow pipe into the housing to the outflow pipe, A main body that has a columnar projection that protrudes upward in the central portion and a base that laterally protrudes from the lower end of the columnar projection in the shape of a brim, and that is installed on the inner bottom of the housing; and an upper surface of the base. An assembling type invert, comprising: an outer peripheral block provided on an outer peripheral portion so as to be spaced apart from the columnar protrusion, and the guide path is formed between the columnar protrusion of the main body and the outer peripheral block. 2. The assembly type invert according to claim 1, wherein a positioning protrusion is formed on the lower surface of the outer peripheral block, and an annular groove into which the protrusion is inserted is formed on the upper surface of the base portion of the main body. A prefabricated invert that is characterized by being. 3. The assembly-type invert according to claim 1, wherein a flow of a fluid flowing from the inflow pipe is installed in contact with an inner side surface of the housing, a side surface of the columnar protrusion, and an upper surface of the base portion. Assembly type invert, which is equipped with a flow path stopper that regulates the direction. 4. The assembly type invert according to claim 3, wherein positioning projections are formed on the lower surfaces of the outer peripheral block and the flow path stopper, and the projections are inserted on the upper surface of the base of the main body. A prefabricated invert, characterized in that an annular groove is formed.