JPH093986A - Spiral type tee for discharging foreign matter - Google Patents

Abstract

PURPOSE: To surely discharge air in a main pipe out of the pipe by providing an air vent which is communicated with the branch part of a branch pipe and which passes through the top of the main pipe, and providing an upwardly bulging air reservoir in that portion. CONSTITUTION: An opening 13 is provided in the bottom of a main pipe 6, and a branch pipe 9 for discharging foreign matter is provided in such a manner as to be communicated with the opening 13. The branch pipe 9 comprises a spiral part 10 formed from the bottom to the top of the main pipe 6 along the periphery of the main pipe 6 and a branch part 11 which extends upward from the top of the pipe. An air vent 14 communicated with the branch part 11 is provided through the top of the main pipe 6, and the portion of the top of the main pipe 6 where the air vent 14 is formed is provided with an air reservoir 17 that bulges upwards. Therefore, bubbles flowing from the upstream of the main pipe 6 along the top of the pipe are trapped in the air reservoir 17, collected there without flowing away to the downstream, and discharged to the branch part 11 of the branch pipe 9 through the air vent 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spiral T-shaped pipe for discharging foreign matter provided in the middle of a pipe line.

[0002]

2. Description of the Related Art Conventionally, when introducing clean water taken in from an upstream side to a utilization facility in a downstream side, a duct using a ductile cast iron pipe or the like is often used. If foreign matter such as mud is mixed in this pipeline, the foreign matter will be transferred to the downstream use facility together with water, which will be an obstacle when using water supply in the use facility.

Therefore, as a foreign substance discharge pipe for discharging such foreign substances in the pipe, for example, a spiral T-shaped pipe for foreign matter discharge as shown in FIGS. 3 and 4 has been proposed. The spiral T-shaped tube for discharging foreign matter is installed in a hydrant pit as shown in FIG. 5, for example.

That is, in FIG. 5, reference numeral 1 is a pipe for water supply, which is constituted by a ductile cast iron pipe laid horizontally in the ground. 2 is a pit for the fire hydrant, which is installed from the surface 3 toward the pipeline 1. A spiral T-shaped pipe 4 for discharging foreign matter is arranged in a portion of the pipe line 1 in the pit 2, and a fire hydrant 5 is attached to the pipe 4.

In FIGS. 3 and 4, reference numeral 6 denotes a ductile cast iron main pipe, which has a receiving port 7 at one end and an insertion port 8 at the other end and is arranged in a horizontal direction to form a pipeline. To be done. Reference numeral 9 denotes a branch pipe, which is integrally formed with the main pipe 6 and has a spiral portion 10 formed from the pipe bottom side to the pipe top side along a substantially half circumference of the main pipe 1 and the pipe top part of the main pipe 1. A branch portion 11 extending upward from the branch portion 11, and a flange 12 for attaching a fire hydrant is provided at the tip of the branch portion 11. The main pipe 6 in the portion where the branch pipe 9 is formed
An opening 13 communicating with the branch pipe 9 is formed at the bottom of the pipe, and foreign matter flowing along the bottom of the main pipe 6 is blocked by the opening 13.
It can be taken in from the inside of the branch pipe 9 and discharged to the outside of the pipe.

An air vent hole 14 communicating with the branch pipe 11 is formed in a penetrating portion of the main pipe 6 at a portion where the branch pipe 9 is provided so that the air flowing along the upper portion of the main pipe 6 is discharged outside the pipe. It can be discharged to.

[0007]

However, in such a conventional spiral T-shaped pipe 4 for discharging a foreign substance, in order to obtain a required foreign substance discharging performance through the opening 13, the main pipe 1 is provided at the top thereof. There is a problem in that the air vent hole 14 formed cannot be made too large, and this is not always sufficient to obtain sufficient air vent performance. That is, in this conventional foreign matter discharging spiral T-shaped tube 4, compared to the conventional T-shaped tube in which a branch pipe branches directly from the top of the pipe body,
There is a problem that the air vent performance is only about 1/30. Therefore, when the end portion of the branch portion 11 is opened to force the drainage through the air vent hole 14, most of the air in the pipe can be forcibly discharged accordingly.
When only the air that naturally passes through the air vent hole 14 is stored in the branch portion 11 without opening the end portion of the branch portion 11,
The air in the main pipe 1 is hard to escape, and the bubbles flowing from the upstream side in the main pipe 1 flow out to the downstream side.

Therefore, the present invention aims to solve such problems and improve the air venting performance through the air vent holes 14.

[0009]

To achieve this object, the present invention provides an opening at or near the bottom of a main pipe forming a horizontal pipe, and a branch pipe communicating with the opening is provided. The main pipe is provided on the main pipe, and the branch pipe has a spiral portion formed along the periphery of the main pipe from the pipe bottom portion or its vicinity toward the pipe top, and a branch portion extending upward from the pipe top. Foreign matter flowing along the bottom of the pipe is taken in from the opening and discharged to the outside of the pipe. An air vent hole communicating with the branch is provided at the top of the main pipe, and air is removed at the top of the main pipe. An air reservoir that bulges upward is provided in the portion where the hole is formed.

[0010]

With this structure, the bubbles flowing from the upstream side of the main pipe are temporarily stored in the air reservoir and therefore do not flow away to the downstream side, and then are discharged to the branch portion of the branch pipe through the air vent hole. To be done.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS.
Based on this, the same members as those shown in FIGS. 3 to 5 are designated by the same reference numerals and will be described in detail. As shown in the figure, the bulging portion 16 that bulges upward toward the inside of the branch portion 11 is formed by the pipe wall at the top of the main pipe 6 in the portion where the air vent hole 14 communicating with the branch pipe 9 is provided. There is. Inside the main pipe 6, an air reservoir 17 bulging upward is formed by the bulging portion 16. Air vent hole
14 is formed so as to communicate with the uppermost part of the air reservoir 17.

According to such a structure, the bubbles flowing from the upstream side of the main pipe 6 along the top of the main pipe 6 are trapped in the air reservoir 17 and accumulated inside the air reservoir 17, and thus flow away to the downstream side. There is no air flow, and then the air is surely discharged to the branch portion 11 through the air vent hole 14. The air accumulated in the branch portion 11 is discharged outside the tube by opening the end portion of the branch portion 11.

[0013]

As described above, according to the present invention, an air vent hole communicating with the branch portion is provided through the top of the main pipe, and the air vent hole is formed at the top of the main pipe.
Since the air reservoir that bulges upward is provided, bubbles that have flowed from the upstream side of the main pipe can be captured by this air reservoir and then discharged through the air vent hole to the branch portion, so that the bubbles flow to the downstream side. The air inside the pipe can be reliably discharged to the outside without leaving.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a spiral T-shaped tube for discharging foreign matter according to an embodiment of the present invention.

2 is a cross-sectional view of the spiral T-shaped tube for discharging foreign matter of FIG.

FIG. 3 is a vertical cross-sectional view of a conventional foreign matter discharging spiral T-tube.

4 is a cross-sectional view of the foreign matter discharging spiral T-tube shown in FIG.

FIG. 5 is a view showing a laid state of the foreign matter discharging spiral T-tube shown in FIGS. 3 and 4;

[Explanation of symbols]

 6 Main pipe 9 Branch pipe 10 Spiral part 11 Branch part 13 Opening part 14 Air vent hole 17 Air reservoir

Claims (1)

[Claims] 1. An opening is provided at or near a pipe bottom of a main pipe forming a horizontal pipe passage, and a branch pipe communicating with the opening is provided in the main pipe. The branch pipe extends along the periphery of the main pipe. Has a spiral portion formed from or near the bottom of the pipe toward the top of the pipe, and a branch portion extending upward from the top of the pipe to take in foreign matter flowing along the bottom of the main pipe from the opening. The air vent hole communicating with the branch portion is provided at the top of the main pipe so that the air vent hole at the top of the main pipe is provided with an upwardly swelling air reservoir. A spiral T-shaped tube for discharging foreign matter, characterized in that