JP3739502B2 - Contaminant collecting device in water pipe - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a foreign matter collecting apparatus for collecting foreign matter contained in a fluid flowing in a fluid pipe such as a water pipe.
[0002]
[Prior art]
A flowing water pipe such as a water pipe may contain foreign substances such as sand, rust powder, and metal powder. Therefore, such foreign substances are conventionally collected and removed. As a contaminant collection device, for example, a contaminant reservoir that bulges in the radial direction from the flowing water pipe main body is provided, and a mesh-like filter is provided in the reservoir so as to be orthogonal to the tube axis direction. Is known (for example, JP-A-7-136420).
[0003]
[Problems to be solved by the invention]
By the way, in a water pipe, the inside of a water pipe is wash | cleaned after piping construction, At the time of this washing, a polypig is passed in a water pipe. The polypig is shaped like a conical bullet as shown in FIG. 8, and advances while being slid onto the inner surface of the water pipe by pressurized fluid from behind. However, in the prior art, since the mesh-like filter is provided so as to be orthogonal to the tube axis direction, the polypig cannot pass.
In addition, it is also known that the central portion of the flowing water pipe is formed to have a large diameter and the large diameter portion is formed to be long in the pipe axis direction. Therefore, the polypig cannot be advanced with the pressurized fluid.
[0004]
This invention is made | formed in view of the said conventional problem, and is providing the foreign material collection apparatus which can let a polypig pass after piping.
[0005]
[Means for Solving the Problems]
To achieve the above object, the present onset Ming, contaminants in the water pipe body portion of generally cylindrical, water pipes and a contaminant reservoir that bulges radially from the water pipe main body trapping in the device, between the inner wall surface of the water pipe main body with curved so as to form a substantially cylindrical surface, a first semi-circular annular member covering the contaminants reservoir from above, from contaminants falling hole with contaminants that have fallen to the contaminant reservoir is prevented from flowing out to the water pipe body portion, and a fluid passage hole to allow fluid from flowing in the water pipe body portion through contaminants reservoir from contaminants falling hole I have.
[0006]
According to the onset bright, because contaminants reservoir is bulged from water pipe main body, the flow rate is reduced in the water tube of該溜portion upward, contaminants reservoir contaminants from contaminants falling hole It is dropped and collected. On the other hand, since the first semicircular ring portion is curved so as to form a substantially cylindrical surface with the inner wall surface of the water pipe main body portion, the polypig can be passed.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the first invention of the present application will be described with reference to the drawings.
1 and 2 show a first embodiment.
As shown in FIGS. 1A and 1B, the foreign matter collecting apparatus includes a water pipe 3 and first and second semi-annular members 1 and 2.
[0008]
The water pipe 3 includes, for example, a substantially cylindrical main body part ( water pipe main body part) 31 having a pair of flange joint parts 30 and 30 at both ends, and a reservoir part that bulges downward from the main body part 31 in the radial direction ( It is a water pipe provided with a foreign matter reservoir (32). A drain hole 33 for discharging the foreign matter A accumulated in the reservoir 32 communicates with the lower portion of the reservoir 32. An open / close valve (not shown) is attached to the drain hole 33.
[0009]
Each of the first and second semi-annular members 1 and 2 is formed of a metal plate (for example, a stainless steel plate) having a spring property separate from the water pipe 3, and is clearly shown in FIG. Thus, the flat flange portions 11 and 21 are fitted and mounted in the mounting recesses 34 and 35 formed in the water pipe 3. The first semi-annular member 1 is formed longer in the tube axis direction than the second semi-annular member 2. It said first semicircular annular member 1, together are continuous with the inner wall surface 36 of the upstream in the water pipe 3 is curved so as to form a substantially cylindrical surface with the inner wall surface 36 of the water pipe 3, reservoir The part 32 is covered from above. The second semi-annular member 2 faces the first semi-annular member 1 substantially in parallel and is disposed at a position where it slightly enters the reservoir 32.
[0010]
For example, an H-shaped hole 12 is formed in the first semi-annular member 1 as clearly shown in FIG. On the other hand, a plurality of elongated rectangular holes 22 are formed in the second semi-annular member 2, for example. The upstream portions of these holes 12 and 22 constitute a contaminant fall hole 4 that allows water to flow into the reservoir 32 of FIG. 1B and allows the contaminant A to fall. On the other hand, the downstream portions of the holes 12 and 22 prevent the foreign matter A that has fallen and accumulated in the reservoir 32 from flowing into the main body 31, and allows water to flow from the reservoir 32 into the main body 31. The fluid passage hole 5 that allows
[0011]
Next, a mechanism for collecting impurities A will be described.
Contaminant A having a specific gravity greater than that of water such as sand or metal powder flows through the bottom of water pipe 3, and is carried as a hairy lump as shown in FIG. 1 (b). In the reservoir 32, the cross-sectional area of the pipe line is large, the flow velocity distribution changes, and the flow velocity decreases as a whole. Due to the decrease in the flow velocity, the foreign matter A easily falls downward, and the foreign matter A falls from the foreign matter dropping hole 4 to the reservoir 32 and is collected. The contaminant A slightly falls from the fluid passage hole 5 downstream of the first semi-annular member 1 to the reservoir 32. Also, the foreign matter A collected in the reservoir 32 is removed together with water by opening the discharge valve attached to the drain hole 33.
[0012]
On the other hand, most of the water flows downstream in the main body portion 31, but a part of the water passes from the inside of the main body portion 31 through the foreign substance dropping hole 4 through the reservoir portion 32, and again from the fluid passage hole 5 to the main body. It flows into the part 31. Here, when the amount of water used is large or suddenly increases, the pressure in the downstream of the main body 31 decreases, and the water in the reservoir 32 flows out downstream of the main body 31. Since the passage hole 5 is provided, the foreign matter A in the reservoir 32 can be prevented from flowing out of the fluid passage hole 5.
[0013]
In the above configuration, since the first semicircular member 1 that assists the collection by the reservoir 32 is a semicircular shape along the inner wall surface 36, the polypig can be passed through as it is.
[0014]
Moreover, since the foreign substance fall hole 4 and the fluid passage hole 5 provided in the 1st and 2nd semi-annular members 1 and 2 are not mesh-like, the foreign substance fall hole 4 and the fluid passage hole 5 are the foreign substance A. There is no risk of clogging.
[0015]
3 and 4 show a second embodiment.
In the present embodiment, a core misalignment portion 37 in which a portion of the main body portion 31 facing the reservoir portion 32 is slightly bulged in the radial direction is provided. The first semi-annular member 1 forms a substantially cylindrical surface with the inner wall surface of the bulged main body portion 31 (core misalignment portion 37). Therefore, the flow path L2 of this portion is upstream and downstream. Are slightly decentered upward with respect to the flow paths L1 and L3. On the other hand, the second semicircular member 2 is longer than the first semicircular member 1 in the tube axis direction and is curved so as to be continuous with the upstream inner wall surface 36 in the water pipe 3. Between the first semi-annular member 1 and the main body 31, a foreign substance dropping hole 4 and a fluid passage hole 5 are provided. Further, as shown in FIG. 3, for example, four rectangular holes 23 are formed in the second semi-annular member 2, and a foreign matter dropping hole 4 and a fluid passage hole 5 are formed.
[0016]
In the present embodiment, since the core misalignment portion 37 is provided in the main body portion 31 of FIG. 3, the distribution of the flow velocity from the upstream is dispersed, and the first semicircular member 1 and the second semicircular member 2 are separated. The flow becomes slower. Therefore, the lump-like impurities A are scattered, and when the impurities A flow between the first semi-annular member 1 and the second semi-annular member 2, they easily fall downward. Therefore, the collection effect of the foreign matter A is improved.
[0017]
In the present invention, the main body 31 and the first semi-annular member 1 may be slightly curved in the tube axis direction as shown in FIG. Moreover, the 2nd semi-annular member 2 does not need to be provided like FIG. 6 and FIG. Further, the first semi-annular member 1 may be slightly decentered toward the reservoir 32 as shown in FIG. Further, the first semi-annular member 1 may have different shapes on the upstream side and the downstream side as shown in FIG.
[0018]
Further, the fluid passage hole 5 of the first semi-annular member 1 forms a cylindrical surface and is not opposed to the tube axis direction. You may comprise with many small holes. In this case, backwashing of the mesh may be performed by providing a water discharge hole 38 for backwashing, attaching an on-off valve (not shown) to the water discharge hole 38, and opening the on-off valve. .
[0019]
Further, in this onset bright, it does not limit the shape and number of the first semi-circular annular member 1 and the second semicircular annular member second holes 12 and 22 in FIG. 1. In the present invention, the mounting structure of the first semi-annular member 1 and the second semi-annular member 2 is not limited .
[0020]
【The invention's effect】
As described above, according to this onset bright, because the first semicircular annular part forms a cylindrical surface with the inner wall of the water pipe main body, it is possible to pass Poripigu, first semicircle Since the annular member is not orthogonal to the tube axis, there is no possibility of clogging.
[Brief description of the drawings]
1 is a cross-sectional view and a longitudinal sectional view showing a first embodiment of the present onset light contaminants collecting apparatus.
FIG. 2 is a cross-sectional view of the same plane.
FIG. 3 is a transverse sectional view and a longitudinal sectional view showing a second embodiment.
FIG. 4 is a sectional view of the same plane.
FIG. 5 is a longitudinal sectional view showing a third embodiment.
FIG. 6 is a longitudinal sectional view showing a fourth embodiment.
FIG. 7 is a longitudinal sectional view showing a fifth embodiment.
FIG. 8 is a side view of a polypig.
[Explanation of symbols]
1: First semi-annular member 2: Second semi-annular member 3: Water pipe 31: Body portion 32: Reservoir portion 36: Inner wall surface 4: Contaminating material falling hole 5: Fluid passage hole

Claims (3)

A water pipe body portion of generally cylindrical in contaminants collecting device in water pipes and a contaminant reservoir that bulges downward in the radial direction from the water pipe main body,
And with curved to form a substantially cylindrical surface, a first semi-circular annular member that covers the contaminants reservoir from above between the inner wall surface of the water pipe main body,
Between the water pipe main body and the first semi-circular annular member, or formed on at least one of the first semicircular annular member, contaminants contaminants are allowed to fall on the contaminants reservoir A drop hole,
Between the water pipe main body and the first semi-circular annular member, or formed on at least one of the first semicircular annular member, contaminants that have fallen to the contaminant reservoir from the impurities falling hole tap A fluid passage hole that suppresses flowing out into the pipe main body part and allows fluid to flow out from the foreign substance dropping hole through the foreign substance reservoir part into the water pipe main body part ,
The first semi-annular member is separate from the water pipe and is made of a metal plate having a spring property, and a fitting recess formed in the water pipe is fitted with a flange portion of the metal plate. Contaminant collecting device for water pipes. In claim 1,
Substantially parallel to the first semicircular annular member, and than the first semicircular annular member disposed contaminants reservoir side, a second semi-circular annular facing the first semicircular annular member contaminants collecting device in water pipes, characterized in that it comprises a section member. In claim 1,
The first semi-annular member is a contaminant collecting device in a water pipe that is connected to an upstream inner wall surface of the water pipe.

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