JPH09189066A - Water take-in pipe of sewage intake facility for heat source - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the power consumption by taking in the water which has got rid of foreign matter such as rubbish or fibers which may be of comparatively large size, and reduce the counter-washing frequency of an auto-strainer installed in a sewage intake facility greatly. SOLUTION: The water intake part 6 of a take-in pipe 5 is installed inside a sewage passage 1 consisting of a pipeline, closed conduit, and/or culvert in such a way as concentrical with the sewage passage 1, and tapered slits 7, 7... with diameter enlarging in the sewage flowing direction F are formed at a spacing P in the sewage flowing direction on the section in the axial direction. The inside 6A of the water intake part 6 is put in communication with the sewage passage 1 through this group 7 of slits.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water intake pipe of a heat source sewage intake facility, and more specifically, it removes foreign substances such as relatively large dust and fibrous dust to remove water. The present invention relates to an intake pipe having a function capable of performing.

[0002]

2. Description of the Related Art Conventionally, in the sewage intake system for heat source shown in FIG. 14, sewage is taken from a sewage passage 1 formed by a pipeline, a closed channel or an open channel, and unused waste heat of the sewage is used as a heat source. When used in the exchanger or the heat pump 2, the sewage taken by the intake pump 3 is introduced into the heat exchanger or the heat pump 2 after removing foreign matters such as dust by the well-known auto strainer 4.

However, in conventional sewage intake facilities for heat sources,
When foreign matter such as relatively large dust and foreign matter such as fibrous dust that have flowed in with the sewage from the intake pipe 5 due to the operation of the intake pump 3 are taken into the auto strainer 4, the taken foreign substances are discharged. Therefore, it is necessary to increase the frequency of backwashing the auto strainer 4, resulting in waste of power consumption.

[0004]

That is, in conventional sewage intake facilities for heat sources, foreign substances such as relatively large dust and fibrous dust that have flowed in with the sewage from the intake pipe and foreign substances such as fibrous dust are collected by the auto strainer. If it is inserted, the backwashing frequency of the auto strainer becomes high, and the power consumption becomes large. Therefore, the present invention removes foreign matter such as relatively large-sized dust and foreign matter such as fibrous dust so that water can be taken in, thereby significantly reducing the backwash frequency of the auto strainer and reducing power consumption. It is an object of the present invention to provide an intake pipe of a sewage intake facility for a heat source, which has a function capable of being performed.

[0005]

In order to achieve the above-mentioned object, the present invention uses a water intake pipe connected to a suction port of a water intake pump to discharge sewage from a sewer passage formed by a pipe line, a closed channel or an open channel. In an intake pipe of a sewage intake facility for heat source configured to take in water and use it as a heat source, the intake part of this intake pipe is installed along the flow of the sewage in the sewage passage and expands in the flow direction of the sewage. It is composed of a slit group in which tapered slits having a diameter are arranged at a predetermined interval in the axial direction of the sewage flow direction, and the inside of the intake section and the sewage passage communicate with each other through this slit group. It is characterized by that. According to the present invention, the sewage passage configured by a pipe, a closed channel, an open channel, or the like allows the sewage to flow down at a higher speed than a water channel through which seawater or river water flows. Moreover, the slit group is formed by arranging tapered slits in the sewage flow direction, that is, in a form that does not oppose the flow of the sewage, and is arranged at a predetermined interval in the sewage flow direction in the axial cross section. Therefore, the foreign matter such as relatively large dust mixed in the sewage and the foreign matter such as fibrous dust flow down together with the sewage without being caught in the intake portion. By collecting sewage by operating the intake pump, even if a part of the sewage flows toward the inside of the intake part through each tapered slit, the inlet width of each tapered slit, that is, the tapered slit. By setting the gap in the flow direction of the sewage to a size that prevents the foreign matter from entering, it is possible to remove the foreign matter and collect the sewage. Further, the backwash flow is periodically made to flow from the inside of the water intake portion toward the sewer passage, whereby clogging of the slit group can be eliminated.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the present invention. It should be noted that the same or corresponding portions as those of the heat source sewage intake facility described in FIG. In FIG. 1, a sewage intake facility for a heat source is a heat exchanger or heat pump that uses sewage unused waste heat as a heat source by collecting sewage from a sewage passage 1 formed of a pipeline, a closed channel, an open channel, or the like. It is supposed to be used for 2 etc. The sewage taken by the water intake pump 3 is introduced into the heat exchanger, the heat pump 2, etc. after removing foreign matters such as dust by the well-known auto strainer 4.

A water intake pipe 5 is connected to the suction port 3A of the water intake pump 3, and a water intake portion 6 on the front end side of the water intake pipe 5 extends in the sewage passage 1 along the flow F of the sewage water and the intake line 5 It is installed with the tip closed while the axis of the part 6 is concentric. It should be noted that the axis of the water intake portion 6 may be installed in the sewage passage 1 in a state of being eccentric and parallel to the axis of the sewage passage 1 instead of being concentric.

As shown in FIG. 2, in the water intake portion 6 of the water intake pipe 5, tapered slits 7A, 7A ... Which are expanded in the sewage flow F direction are axially sectioned in the sewage flow F flow direction. The slit group 7 has a space P and is arranged so as to project radially outward of the water intake pipe 5, and the inside 6A of the water intake portion 6 and the sewer passage 1 communicate with each other via the slit group 7. .

As shown in FIG. 3, for example, the slit group 7 constituted by the tapered slits 7, 7, ... Includes a plurality of notches 5 on the front end side of the water intake pipe 5 at equal intervals in the circumferential direction.
a, 5a ... Are formed with a predetermined length in the axial direction, and as shown in FIG. 4, a plurality of fins 8 made of a steel plate (for example, a stainless steel plate) having a frusto-conical cross section are prepared. As shown in FIG. 5 and FIG. 6, each fin 8 is attached to the remaining wall portions 5b, 5b of the intake pipe 5 existing between the notches 5a, 5a.
The method of sequentially welding the small-diameter portions of the fins 8 at the intervals P, or, as shown in FIGS. 7 and 8, the small-diameter portions of the fins 8 are sequentially arranged at the intervals P of a plurality of (for example, four) steel bars ( For example, a fin unit 10 is constructed by welding stainless steel rods 9, 9 ..., and as shown in FIG. 9, the intake pipes 5, 5 axially divided via the fin unit 10 are joined by welding. Alternatively, as shown in FIG. 10 and FIG. 11, a plurality of small diameter portions (for example, 4 pieces) of the small diameter portion of the thin steel sheet (for example, stainless steel sheet) 11 spirally wound are sequentially arranged with the interval P as one pitch. A fin unit 10 welded to steel bars (for example, stainless steel bars) 9 and 9 is constructed, and as shown in FIG. 12, the intake pipes 5 and 5 axially divided through the fin unit 10 are connected by welding. Depending on the method It can be configured. Note that a large number of small through holes may be formed in the water pipe 5 instead of the notches 5a, 5a ... Shown in FIG.

In the above structure, in the sewage passage 1 constituted by the conduit, the closed channel or the open channel shown in FIGS. 1 and 2, the sewage flows down at a higher speed than the water channel through which seawater or river water flows. Moreover, the slit group 7 forming the water intake part 6 has an axial cross section in a form in which the tapered slits 7A, 7A ... Are expanded in the flow direction F of the sewage, that is, in a form that does not oppose the flow F of the sewage. Since they are arranged with a predetermined interval P in the flow direction F of the sewage, foreign substances such as relatively large dust mixed in the sewage and foreign substances such as fibrous dust are collected in the intake section 6. It flows down with sewage without being caught.

When the sewage is taken by operating the water intake pump 3, a part of the sewage is indicated by an arrow f in FIGS. 5, 9 and 12.
As shown by, flows through the tapered slits 7A, 7A ... Toward the inside 6A of the water intake section 6. However, the inlet width of each of the tapered slits 7A, 7A, that is, the interval P in the flow direction of the sewage of the tapered slits.
By setting the size so that foreign matter such as relatively large dust mixed in the sewage and foreign matter such as fibrous dust cannot enter, the foreign matter is removed and the sewage is taken in. be able to. Therefore, the foreign matter such as relatively large dust and the foreign matter such as fibrous dust are not taken into the auto strainer 4 of FIG. Therefore, the backwash frequency of the auto strainer 4 can be significantly reduced and the power consumption can be reduced as compared with the conventional intake pipe of the sewage intake system for heat sources.

Further, as shown by an arrow FO in FIGS. 5, 9 and 12, a backwash flow is periodically made to flow from the inside 6A of the water intake part 6 toward the sewer passage 1, so that the slit group 7 has an eye. The clogging can be cleared. Therefore, it becomes possible to continuously carry out water intake while preventing the foreign matter from entering.

In the above embodiment, the sewage flow F
Taper slits 7A, 7A ...
A slit group 7 having an interval P in the direction of sewage flow F in the axial cross section and arranged so as to project outward in the radial direction of the intake pipe 5.
Although the water intake portion 6 of the water intake pipe 5 is configured by the above description, as shown in FIG. 13, the tapered slits 7A, 7A ... There is an interval P in the sewage flow F direction, and the outer diameter is the intake pipe 5
The water intake part 6 may be configured by the slit group 7 arranged so as to have the same outer diameter as the above.

[0014]

As described above, the present invention provides a pipe line,
In a sewer passage composed of a closed or open channel, sewage flows down at a higher speed than a channel that flows seawater or river water, and the tapered slit has an axial cross section that does not oppose the flow of sewage. Since the intake part is composed of slits arranged with a predetermined interval in the flow direction of sewage, foreign matter such as relatively large dust mixed in sewage and fibrous dust It is possible to make a foreign substance flow down together with the sewage without being caught in the water section. In addition, when sewage is taken in by operating the intake pump, even if a part of the sewage flows toward the inside of the intake part through each tapered slit, the interval of each tapered slit in the sewage flow direction is By setting the size such that the foreign matter cannot enter, it is possible to remove the foreign matter and collect the sewage. Therefore, foreign matter such as relatively large dust and foreign matter such as fibrous dust are not taken into the auto strainer. Therefore, the backwash frequency of the auto strainer can be significantly reduced, and the power consumption can be reduced, as compared with the conventional intake pipe of the sewage intake system for heat sources. Furthermore, by periodically flowing a backwash flow from the inside of the water intake portion toward the sewer passage, it is possible to eliminate the clogging of the slit group, so that the water intake that prevents the intrusion of the foreign matter is continued for a long time. It will be possible to do.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an embodiment of a heat source sewage intake facility to which the present invention is applied.

FIG. 2 is a schematic enlarged cross-sectional view showing an embodiment of a water intake section.

FIG. 3 is an enlarged perspective view showing a component of a water intake portion formed on the water intake pipe.

FIG. 4 is an enlarged cross-sectional view showing a fin that is a component of the water intake section.

FIG. 5 is an enlarged cross-sectional view showing an embodiment of a water intake section.

FIG. 6 is a sectional view taken along line AA of FIG. 5;

FIG. 7 is an enlarged cross-sectional view showing another component of the water intake section.

FIG. 8 is a sectional view taken along line BB of FIG. 7;

FIG. 9 is an enlarged cross-sectional view showing another embodiment of the water intake section.

FIG. 10 is an enlarged side view showing constituent members having different water intake portions.

11 is a cross-sectional view taken along the line CC of FIG.

FIG. 12 is an enlarged side view showing another embodiment of the water intake section.

FIG. 13 is an enlarged sectional view showing still another embodiment of the water intake section.

FIG. 14 is a configuration diagram showing a sewage intake facility for a heat source.

[Explanation of symbols]

 1 Sewage passage 3 Intake pump 3A Suction port of intake pump 5 Intake pipe 6 Intake part 6A Inside of intake part 7 Slit group 7A Taper slit F Flow direction of sewage P Spacing of slit

Claims (1)

[Claims] 1. A sewage intake for a heat source configured to take in sewage from a sewage passage formed by a pipeline, a closed channel, an open channel, etc. by using an intake pipe connected to a suction port of an intake pump and used as a heat source. In the intake pipe of the equipment, the intake part of the intake pipe is installed along the flow of the sewage in the sewage passage, and a tapered slit whose diameter is expanded in the flow direction of the sewage is provided in the sewage flow direction in the axial section. An intake pipe for a sewage intake facility for heat source, characterized in that the intake pipe is constituted by a group of slits arranged at predetermined intervals, and the inside of the intake section communicates with the sewage passage through the slit group.