JPH11158943A - Circulation type water distribution system - Google Patents

Circulation type water distribution system

Info

Publication number
JPH11158943A
JPH11158943A JP32763497A JP32763497A JPH11158943A JP H11158943 A JPH11158943 A JP H11158943A JP 32763497 A JP32763497 A JP 32763497A JP 32763497 A JP32763497 A JP 32763497A JP H11158943 A JPH11158943 A JP H11158943A
Authority
JP
Japan
Prior art keywords
water
distribution
water distribution
reservoir
return pipe
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP32763497A
Other languages
Japanese (ja)
Inventor
Eiichi Sugiura
鋭一 杉浦
Michio Uzawa
道雄 鵜澤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JFE Engineering Corp
Original Assignee
NKK Corp
Nippon Kokan Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NKK Corp, Nippon Kokan Ltd filed Critical NKK Corp
Priority to JP32763497A priority Critical patent/JPH11158943A/en
Publication of JPH11158943A publication Critical patent/JPH11158943A/en
Pending legal-status Critical Current

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  • Water Treatment By Sorption (AREA)

Abstract

PROBLEM TO BE SOLVED: To prevent water deterioration in a water distribution mains by a small-scaled system in advance. SOLUTION: Return pipings 13a, 13b and 13c to a distribution basin are connected to middle parts of water distribution mains 6a, 6b and 6c for supplying service water from a water purification plant to water demand homes from the distribution basin 3. An activated carbon absorption device for separating and eliminating impurities in distribution water or soluble substances, a filter or devices 15a, 15b and 15c constituted by combining with them are provided at middle parts of the return pipings 13a, 13b and 13c.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、浄水場から配水池
へ上水を送り、配水池から配水本管を介して水需要家へ
供給する配水システムに係り、より詳しくは、配水本管
内の水質劣化を防止できる循環型配水システムに関す
る。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water distribution system for sending water from a water treatment plant to a distribution reservoir and supplying the water from the distribution reservoir to a water consumer via the distribution main, and more particularly, to a water distribution system in the distribution main. The present invention relates to a circulation type water distribution system that can prevent water quality deterioration.

【0002】[0002]

【従来の技術】従来より、浄水場から配水池へ上水を送
り、配水池から配水本管を介して水需要家へ供給する配
水システムは知られている。例えば、厚生省監修「水道
施設設計指針・解説」1990 日本水道協会編 p.61
3 図-9.50 送・配水施設の制御例には、配水池から水需
要家の存在する各地区に対しそれぞれ配水本管を設け、
各配水本管は先止めして、配水池から水需要家方向への
み上水を流すパイプラインを形成したものが示されてい
る。
2. Description of the Related Art Conventionally, there is known a water distribution system in which clean water is sent from a water purification plant to a distribution reservoir and supplied from the distribution reservoir to a water consumer via a distribution main pipe. For example, Ministry of Health and Welfare supervised “Water Facilities Design Guidelines and Explanations” 1990 Japan Water Works Association p.61
3 Figure-9.50 In the control example of the transmission and distribution facilities, distribution mains are installed from the reservoir to each area where water consumers are located.
The figure shows that each distribution main is stopped beforehand and a pipeline is formed to flow water only from the reservoir to the water consumer.

【0003】このような水需要家方向へのみ上水を流動
させるパイプラインシステムにおいては、配水区域内の
水圧の均等化、需要が変動する時間帯間での水圧管理を
主目的としてシステムが構築されている。
[0003] In such a pipeline system for flowing clean water only in the direction of the water consumer, a system is constructed mainly for equalizing the water pressure in the water distribution area and managing the water pressure during the time zone when the demand fluctuates. Have been.

【0004】ところで、上水の使用量が激減する夜間か
ら明け方にかけて、上水は配水管内に長時間滞留する。
このため、上水は配水管内で水質が劣化(赤錆、トリハ
ロメタンの生成など)する。しかし、配水池から水需要
家方向へのみ上水を流す配水システムにあっては、劣化
した水質を回復させることは難しい。
[0004] By the way, from nighttime when the usage of clean water is drastically reduced to dawn, clean water stays in the water distribution pipe for a long time.
For this reason, the quality of the clean water degrades in the water distribution pipe (such as formation of red rust and trihalomethane). However, it is difficult to recover degraded water quality in a water distribution system that only flows water from the reservoir to the water consumer.

【0005】そこで、配水池よりも下流側の配水本管の
途中に切換弁を設け、この切換弁に配水池よりも上流側
の浄水場に至る戻り配管を接続して、配水本管内の水質
が劣化すると切換弁により配水流路を切り換え、劣化し
た上水を浄水場へ戻し、水質を回復させるようにした循
環型の配水システムが提案されている(特開平7−90
888号公報)。なお、これ以降、配水本管およびこれ
に接続する戻り配管内の上水を「配水」と称す。
[0005] Therefore, a switching valve is provided in the middle of the distribution main pipe downstream of the distribution reservoir, and a return pipe connected to a water purification plant upstream of the distribution reservoir is connected to this switching valve, so that the water quality in the distribution main pipe is reduced. When the water quality deteriorates, a circulation type water distribution system has been proposed in which a water distribution channel is switched by a switching valve, the deteriorated clean water is returned to a water purification plant, and the water quality is restored (Japanese Patent Laid-Open No. 7-90).
888). Hereinafter, the water in the water distribution main pipe and the return pipe connected thereto will be referred to as “water distribution”.

【0006】[0006]

【発明が解決しようとする課題】ところで、浄水場は、
濾過槽など広いスペースを必要とする設備を擁してい
る。一方、配水池は浄水場で濾過された上水を受け入
れ、配水本管に配水するだけであるため、広いスペース
を必要としない。したがって、一般に浄水場は水源近く
に設置され、配水池は市街地の近辺に設置される。この
ため、従来の循環型配水システムのように、配水本管内
の滞留で水質が劣化した配水を浄水場へ戻すには、還流
路となる戻り配管の敷設距離が長くなり、戻り配管の敷
設費用が膨大なものとなる。
[Problems to be solved by the invention] By the way, the water purification plant
It has facilities that require a large space, such as filtration tanks. On the other hand, the distribution reservoir only receives the clean water filtered at the water purification plant and distributes it to the distribution mains, so that it does not require a large space. Therefore, in general, water treatment plants are installed near water sources, and reservoirs are installed near urban areas. For this reason, as in the case of the conventional circulation type water distribution system, in order to return distribution water whose water quality has deteriorated due to stagnation in the distribution pipe to the water purification plant, the return pipe laying distance, which is a return path, becomes longer, and the return pipe laying cost is increased. Becomes huge.

【0007】また、配水本管内の水質が劣化した配水
を、切換弁により配水流路を切り換えて浄水場へ戻すよ
うにしているため、還流させている間は、水需要家への
供給が断たれてしまう(節水状態となる)。
[0007] In addition, since the water distribution in the main water distribution pipe whose quality has deteriorated is returned to the water treatment plant by switching the water distribution flow path by the switching valve, supply to the water consumer is interrupted during the reflux. You will be dripping (conserving water).

【0008】また、配水は配水本管内で水質が劣化して
も、一旦、浄水場で濾過された水であるために水質の回
復は容易で、水質回復のために浄水場のような大規模な
設備は必要なく、小規模の活性炭吸着装置や濾過装置ま
たはその組合せから成る装置が有れば十分である。
[0008] Further, even if the water quality is deteriorated in the water distribution main line, the water quality is easily recovered because the water is once filtered at the water purification plant, and the water distribution can be easily restored on a large scale such as a water purification plant for the water quality recovery. No special equipment is required, and it is sufficient to have a small-sized activated carbon adsorption device, a filtration device, or a combination thereof.

【0009】いずれにしても、従来は配水本管内の水質
が劣化した場合に配水を循環させて水質の回復を図ると
いう消極的な考えに基づいてシステムが構築されてお
り、予め配水本管内の水質の劣化を防止するという概念
は存在していない。
In any case, conventionally, a system has been constructed based on the passive idea of circulating the water distribution to recover the water quality when the water quality in the water distribution main has deteriorated. There is no concept of preventing deterioration of water quality.

【0010】本発明の技術的課題は、小規模のシステム
により配水本管内の水質劣化を予め防止できるようにす
ることにある。
[0010] It is a technical object of the present invention to prevent water quality deterioration in a water distribution main pipe in advance by using a small-scale system.

【0011】[0011]

【課題を解決するための手段】本発明の請求項1に係る
循環型配水システムは、配水本管の途中に、配水池に至
る戻り配管を接続するとともに、戻り配管の途中に、配
水中に含まれる夾雑物や溶解性有機物等を分離除去する
活性炭吸着装置、又は濾過装置、もしくはそれらの組合
せから成る装置を設けたものである。この請求項1の発
明においては、配水本管の途中に配水池に至る戻り配管
を接続して、配水の一部を常に循環(流動)させるよう
にしているため、配水が配水管内に滞留することがなく
なって、赤水の発生が抑えられる。このため、配水の水
質の劣化を防止できる。更に、戻り配管の途中に設けた
活性炭吸着装置、又は濾過装置、もしくはそれらの組合
せから成る装置により、配水中に含まれる夾雑物や溶解
性微量有機物等が積極的に除去されるので、例えば消毒
用に添加される塩素と、配水中に含まれる農薬類に代表
される溶解性微量有機物との反応で生ずるトリハロメタ
ン(THM)の発生量を低減することができるようにな
る。
A circulation type water distribution system according to claim 1 of the present invention connects a return pipe to a distribution reservoir in the middle of a water distribution main pipe, and connects a return pipe to a middle of the return pipe in a distribution pipe. An activated carbon adsorption device for separating and removing contained impurities and soluble organic substances, etc., or a filtration device, or a device comprising a combination thereof is provided. In the first aspect of the present invention, the return pipe is connected to the distribution reservoir in the middle of the distribution main pipe so that a part of the distribution water is always circulated (flow), so that the distribution water stays in the distribution pipe. This eliminates the occurrence of red water. For this reason, the deterioration of the water quality of distribution water can be prevented. Furthermore, the activated carbon adsorption device provided in the middle of the return pipe, the filtration device, or a device comprising a combination thereof actively removes contaminants, dissolved trace organic substances, and the like contained in the distribution water. It is possible to reduce the amount of trihalomethane (THM) generated by the reaction of chlorine added for use with a trace amount of soluble organic substances represented by agrochemicals contained in water distribution.

【0012】また、本発明の請求項2に係る循環型配水
システムは、戻り配管の途中に返送ポンプを設けたもの
である。この請求項2の発明においては、配水区域が低
地区の場合に有効である。すなわち、低地区への配水
は、一般に自然流下式で行われる。したがって、循環系
内における配水区域からそれよりも高位置にある配水池
までは配水を還流させる手段が必要となる。戻り配管途
中に返送ポンプを設けることで、自然流下式により配水
が行われる低地区を対象とした配水システムに循環方式
を取り入れることができる。
Further, the circulation type water distribution system according to claim 2 of the present invention is provided with a return pump in the middle of the return pipe. The invention of claim 2 is effective when the water distribution area is a low area. In other words, water distribution to low districts is generally performed by gravity. Therefore, a means for circulating water is required from the water distribution area in the circulation system to the distribution reservoir located at a higher position. By providing a return pump in the middle of the return pipe, a circulation system can be adopted in a water distribution system for low districts where water is distributed by a natural flow method.

【0013】また、本発明の請求項3に係る循環型配水
システムは、戻り配管を、配水池からの配水を加圧して
水需要家へ供給するための配水ポンプの下流側に接続し
たものである。この請求項3の発明においては、配水区
域が中地区および高地区の場合に有効である。すなわ
ち、中地区および高地区への配水は、一般にポンプ加圧
式で行われ、同系統に対しては同一場程の配水ポンプが
使用される。したがって、戻り配管を、配水ポンプの下
流側に接続することで、中地区および高地区を対象とし
た配水システムに循環方式を取り入れることができる。
[0013] In the circulation type water distribution system according to a third aspect of the present invention, the return pipe is connected to a downstream side of a water distribution pump for pressurizing the water distribution from the reservoir and supplying the water to the water consumer. is there. The invention of claim 3 is effective when the water distribution area is a middle area and a high area. That is, water distribution to the middle district and the high district is generally performed by a pump pressurization type, and a water distribution pump of the same place is used for the same system. Therefore, by connecting the return pipe to the downstream side of the water distribution pump, a circulation system can be adopted in the water distribution system for the middle district and the high district.

【0014】また、本発明の請求項4に係る循環型配水
システムは、戻り配管の途中に流量を調節する調節弁を
設けたものである。この請求項4の発明においては、戻
り配管の途中に設けた調節弁により流量を調節すること
で、配水池への還流路を含む配水区域内の水圧の均等化
や、需要が変動する時間帯間での水圧管理が容易とな
り、水需要家へ供給可能状態におきながら配水の一部を
常に循環(流動)させることができる。
The circulation type water distribution system according to a fourth aspect of the present invention is provided with a control valve for adjusting a flow rate in the middle of the return pipe. According to the fourth aspect of the present invention, by adjusting the flow rate by the control valve provided in the middle of the return pipe, the water pressure in the distribution area including the return path to the distribution reservoir can be equalized, and the time period during which the demand fluctuates can be improved. It is easy to control the water pressure between the waters, and it is possible to constantly circulate (flow) a part of the water distribution while keeping the water supply available.

【0015】[0015]

【発明の実施の形態】以下、図示実施形態により本発明
を説明する。図1は本発明の実施形態に係る循環型配水
システムを示す構成図である。
DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the illustrated embodiments. FIG. 1 is a configuration diagram showing a circulation type water distribution system according to an embodiment of the present invention.

【0016】本実施形態の循環型配水システムは、図示
しない浄水場からの上水が、バッファ機能を持つポンプ
井1に一旦貯留されてから送水ポンプ2により配水池3
へ送られる。送水ポンプ2により配水池3へ送られる上
水の時間当たりの流量は、流量計4をみながら調節弁5
により調節され、一定となるように予め設定されてい
る。配水区域内に低地区、中地区および高地区がある場
合、配水本管6が各地区に対応して3系統6a,6b,
6c設けられ、水需要家とは分岐管7を介して接続され
る。
In the circulation type water distribution system of the present embodiment, water from a water purification plant (not shown) is temporarily stored in a pump well 1 having a buffer function, and is then supplied to a water distribution reservoir 3 by a water supply pump 2.
Sent to The flow rate of clean water sent to the distribution reservoir 3 by the water pump 2 per hour is controlled by the control valve 5 while observing the flow meter 4.
And is set in advance to be constant. When there are low, middle, and high districts in the distribution area, the distribution mains 6 correspond to the three districts 6a, 6b,
6c is provided and connected to the water consumer via the branch pipe 7.

【0017】低地区の場合、配水池3は配水区域よりも
高位置にあるため、水圧を確保できる。したがって、低
地区の配水本管6aにはポンプを設ける必要がない。し
かし、中地区および高地区の場合、水圧を確保するため
のポンプが必要である。このため、配水本管6に配水ポ
ンプ8を設け、配水ポンプ8の下流側で分岐させて2系
統の配水本管6b,6cとしている。
In the low district, the water distribution reservoir 3 is located at a higher position than the distribution district, so that the water pressure can be secured. Therefore, it is not necessary to provide a pump in the water distribution main pipe 6a in the low district. However, in the middle and high districts, a pump is needed to secure water pressure. For this reason, a water distribution pump 8 is provided in the water distribution main pipe 6 and branched off downstream of the water distribution pump 8 to form two systems of water distribution main pipes 6b and 6c.

【0018】各配水本管6a,6b,6cには、それぞ
れの基端側に流量計9a,9b,9cが設置されている
とともに、各流量計9a,9b,9cの下流側にそれぞ
れ遠隔操作可能な弁が設置されている。これら弁のう
ち、低地区側の弁は、配水管の破裂など異常時における
事故防止用として設置されたもので、緊急遮断弁11と
して機能する。中地区側および高地区側の各弁は、それ
ぞれの配水区域内の適正な水量配分を目的として設置さ
れたもので、それぞれ流量を調節する調節弁12a,1
2bとして機能する。
Flow meters 9a, 9b, 9c are provided at the base ends of the water distribution mains 6a, 6b, 6c, respectively, and remote control is provided downstream of the flow meters 9a, 9b, 9c, respectively. Possible valves are installed. Among these valves, the valve on the low district side is installed for preventing an accident in the event of an abnormality such as a rupture of a water pipe, and functions as the emergency shutoff valve 11. Each valve in the middle district and the high district is installed for the purpose of proper water distribution in each water distribution area, and the control valves 12a, 1 for controlling the flow rate, respectively.
2b.

【0019】各配水本管6a,6b,6cの途中には、
それぞれ配水池3に至る戻り配管13a,13b,13
cが接続されている。低地区側の戻り配管13aには、
配水池3が高位置にあるため、途中に配水を還流させる
返送ポンプ14が設けられ、返送ポンプ14の下流側に
流量を調節する遠隔操作可能な調節弁12cが設けられ
ている。また中地区側および高地区側の各戻り配管13
b,13cの途中にも、それぞれ流量を調節する遠隔操
作可能な調節弁12d,12eが設けられている。これ
ら戻り配管13a,13b,13c側の調節弁12c,
12d,12eは、各戻り配管13a,13b,13c
の配水池3側端部が開放されているために必要なもので
あり、これら調節弁12c,12d,12eと中地区側
および高地区側の各配水本管6b,6cに設けた調節弁
12a,12bを調整することによって、配水池3への
還流路を含む配水区域内の水圧の均等化や、需要が変動
する時間帯間での水圧管理が容易となる。
In the middle of each water distribution main pipe 6a, 6b, 6c,
Return pipes 13a, 13b, 13 which respectively reach the reservoir 3
c is connected. In the return pipe 13a on the low district side,
Since the reservoir 3 is at a high position, a return pump 14 for returning water distribution is provided on the way, and a remotely controllable control valve 12c for adjusting the flow rate is provided downstream of the return pump 14. In addition, each return pipe 13 of the middle district and the high district side
In the middle of b and 13c, remotely controllable control valves 12d and 12e for controlling the flow rate are provided, respectively. The control valve 12c on the side of these return pipes 13a, 13b, 13c,
12d and 12e are return pipes 13a, 13b and 13c, respectively.
The control valves 12c, 12d, and 12e and the control valves 12a provided in each of the water distribution main pipes 6b and 6c on the middle and high districts are necessary because the end of the reservoir 3 on the side of the reservoir 3 is open. , 12b, it becomes easy to equalize the water pressure in the water distribution area including the return path to the water distribution reservoir 3 and to manage the water pressure during the time period when the demand fluctuates.

【0020】また、各戻り配管13a,13b,13c
には、それぞれの調節弁12c,12d,12eの下流
側に活性炭吸着装置や濾過装置またはその組合せから成
る装置15a,15b,15cが設けられており、これ
ら活性炭吸着装置や濾過装置またはその組合せから成る
装置15a,15b,15cによって、各循環系内の配
水中に含まれる溶解性微量有機物等や夾雑物を除去でき
るようになっている。
Each return pipe 13a, 13b, 13c
Is provided downstream of each of the control valves 12c, 12d, 12e with a device 15a, 15b, 15c comprising an activated carbon adsorbing device, a filtering device or a combination thereof. The devices 15a, 15b, and 15c can remove soluble trace organic matter and the like and contaminants contained in the water distribution in each circulation system.

【0021】このように、本実施形態の循環型配水シス
テムは、各配水本管6a,6b,6cの途中に、それぞ
れ配水池3に至る戻り配管13a,13b,13cを接
続して、配水の一部を常に循環(流動)させるようにし
ているので、配水が配水管内に滞留することがなくなっ
て、赤水の発生がなくなるとともに、配水中に含まれる
溶解性微量有機物と消毒用に添加される塩素との反応で
生じたトリハロメタン(THM)の濃度が低減される。
このため、配水の水質が大幅に改善される。
As described above, the circulation type water distribution system of the present embodiment connects the return pipes 13a, 13b, 13c to the distribution reservoir 3 in the middle of each of the water distribution main pipes 6a, 6b, 6c, and distributes water. Since part of the water is always circulated (flow), the water distribution does not stay in the water distribution pipe, the generation of red water is eliminated, and the dissolved trace organic matter contained in the water distribution is added for disinfection. The concentration of trihalomethane (THM) generated in the reaction with chlorine is reduced.
For this reason, the quality of water distribution is greatly improved.

【0022】また、各戻り配管13a,13b,13c
の途中にそれぞれ活性炭吸着装置や濾過装置またはその
組合せから成る装置15a,15b,15cを設けてい
るので、配水中に含まれる溶解性微量有機物や夾雑物を
除去でき、循環系内の水質を良好に維持することができ
る。
Each return pipe 13a, 13b, 13c
In the middle of the process, the devices 15a, 15b, 15c each comprising an activated carbon adsorption device, a filtration device or a combination thereof are provided, so that it is possible to remove soluble trace organic substances and impurities contained in the water distribution, and to improve the water quality in the circulation system. Can be maintained.

【0023】また、戻り配管13aの途中に返送ポンプ
14を設けているので、自然流下式により配水が行われ
る低地区を対象とした配水システムに循環方式を取り入
れることができる。
Further, since the return pump 14 is provided in the middle of the return pipe 13a, a circulation system can be adopted in a water distribution system for low districts where water distribution is performed by a natural flow system.

【0024】また、戻り配管13b,13cを、配水池
3からの配水を加圧して水需要家へ供給する配水ポンプ
8の下流側に接続しているので、ポンプ加圧式により配
水が行われる中地区および高地区を対象とした配水シス
テムに循環方式を取り入れることができる。
Further, since the return pipes 13b and 13c are connected to the downstream side of the water distribution pump 8 which pressurizes the water distribution from the reservoir 3 and supplies the water to the water consumer, the water distribution is performed by the pump pressurization method. The circulation system can be incorporated into the distribution system for districts and high districts.

【0025】また、各戻り配管13a,13b,13c
の途中に流量を調節する遠隔操作可能な調節弁12c,
12d,12eを設けているので、配水池3への還流路
を含む配水区域内の水圧の均等化や、需要が変動する時
間帯間での水圧管理が容易となり、水需要家へ供給可能
状態におきながら配水の一部を常に循環(流動)させる
ことができる。
Each return pipe 13a, 13b, 13c
A remotely controllable control valve 12c for adjusting the flow rate during
Since 12d and 12e are provided, it is easy to equalize the water pressure in the water distribution area including the return path to the water reservoir 3 and to manage the water pressure during the time when the demand fluctuates, so that the water can be supplied to the water consumer. It is possible to always circulate (flow) a part of the water distribution while keeping the water.

【0026】[0026]

【発明の効果】以上述べたように、請求項1の発明によ
れば、配水本管の途中に配水池に至る戻り配管を接続し
て、配水の一部を常に循環(流動)させるようにしたの
で、配水管内における配水の滞留がなくなって、赤水の
発生が抑えられ水質の劣化が防止できる。更に、戻り配
管の途中に活性炭吸着装置、又は濾過装置、もしくはそ
の組合せから成る装置を設けたので、配水中に含まれる
溶解性微量有機物や夾雑物を除去でき、消毒用に添加さ
れる塩素と溶解性微量有機物との反応で生ずるトリハロ
メタン(THM)の生成を低減できる。この結果、循環
系内の配水の水質が改善され、これを良好に維持するこ
とができる。
As described above, according to the first aspect of the present invention, the return pipe connected to the distribution reservoir is connected in the middle of the water distribution main pipe so that a part of the water distribution is always circulated (flow). As a result, the distribution of water in the water distribution pipe does not remain, so that the generation of red water is suppressed and deterioration of water quality can be prevented. Further, since an activated carbon adsorption device, a filtration device, or a device comprising a combination thereof is provided in the middle of the return pipe, it is possible to remove soluble trace organic substances and contaminants contained in water distribution, and to remove chlorine added for disinfection. The generation of trihalomethane (THM) generated by the reaction with a trace amount of soluble organic substances can be reduced. As a result, the water quality of the water distribution in the circulation system is improved, and this can be maintained well.

【0027】また、請求項2の発明によれば、戻り配管
の途中に返送ポンプを設けたので、自然流下式により配
水が行われる低地区を対象とした配水システムに本発明
の循環方式を取り入れることができる。
According to the second aspect of the present invention, since the return pump is provided in the middle of the return pipe, the circulation system of the present invention is incorporated in a water distribution system for low districts where water distribution is performed by a natural flow method. be able to.

【0028】また、請求項3の発明によれば、戻り配管
を、配水池からの配水を加圧して水需要家へ供給するた
めの配水ポンプの下流側に接続したので、ポンプ加圧式
により配水が行われる中地区および高地区を対象とした
配水システムに本発明の循環方式を取り入れることがで
きる。
According to the third aspect of the present invention, since the return pipe is connected to the downstream side of the water distribution pump for pressurizing the water distribution from the reservoir and supplying it to the water consumer, the water distribution is performed by the pump pressurization method. The circulation system of the present invention can be applied to a water distribution system for middle and high districts where the water supply is performed.

【0029】また、請求項4の発明によれば、戻り配管
の途中に流量を調節する調節弁を設けたので、配水池へ
の還流路を含む配水区域内の水圧の均等化や、需要が変
動する時間帯間での水圧管理が容易となり、水需要家へ
供給可能状態におきながら配水の一部を常に循環(流
動)させることができる。
According to the fourth aspect of the present invention, since the control valve for adjusting the flow rate is provided in the middle of the return pipe, the water pressure in the water distribution area including the return path to the reservoir can be equalized and the demand can be reduced. It is easy to control the water pressure during the fluctuating time zone, and it is possible to constantly circulate (flow) a part of the water distribution while keeping the water supply available.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の実施形態に係る循環型配水システムを
示す構成図である。
FIG. 1 is a configuration diagram showing a circulation type water distribution system according to an embodiment of the present invention.

【符号の説明】[Explanation of symbols]

3 配水池 6,6a,6b,6c 配水本管 8 配水ポンプ 12c,12d,12e 調節弁 13a,13b,13c 戻り配管 14 返送ポンプ 15a,15b,15c 活性炭吸着装置や濾過装置ま
たはその組合せから成る装置
3 Reservoir 6, 6a, 6b, 6c Main distribution pipe 8 Water distribution pump 12c, 12d, 12e Control valve 13a, 13b, 13c Return pipe 14 Return pump 15a, 15b, 15c Activated carbon adsorption device, filtration device or a combination thereof

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】 浄水場から配水池へ上水を送り、配水池
から配水本管を介して水需要家へ供給する配水システム
において、 前記配水本管の途中に、前記配水池に至る戻り配管を接
続するとともに、 該戻り配管の途中に、配水中の夾雑物や溶解性物質を分
離除去する活性炭吸着装置や濾過装置またはその組合せ
から成る装置を設けたことを特徴とする循環型配水シス
テム。
1. A water distribution system for sending water from a water treatment plant to a distribution reservoir and supplying the water from the distribution reservoir to a water consumer via a distribution main, wherein a return pipe reaching the distribution reservoir in the middle of the distribution main. And a device comprising an activated carbon adsorption device, a filtration device or a combination thereof for separating and removing contaminants and soluble substances in the distribution water is provided in the middle of the return pipe.
【請求項2】 戻り配管の途中に返送ポンプを設けたこ
とを特徴とする請求項1記載の循環型配水システム。
2. The circulation type water distribution system according to claim 1, wherein a return pump is provided in the middle of the return pipe.
【請求項3】 戻り配管を、配水池からの配水を加圧し
て水需要家へ供給するための配水ポンプの下流側に接続
したことを特徴とする請求項1記載の循環型配水システ
ム。
3. The circulation type water distribution system according to claim 1, wherein the return pipe is connected to a downstream side of a water distribution pump for pressurizing water from the distribution reservoir and supplying the water to a water consumer.
【請求項4】 戻り配管の途中に流量を調節する調節弁
を設けたことを特徴とする請求項1乃至請求項3のいず
れかに記載の循環型配水システム。
4. The circulation type water distribution system according to claim 1, wherein a control valve for adjusting a flow rate is provided in the middle of the return pipe.
JP32763497A 1997-11-28 1997-11-28 Circulation type water distribution system Pending JPH11158943A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP32763497A JPH11158943A (en) 1997-11-28 1997-11-28 Circulation type water distribution system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP32763497A JPH11158943A (en) 1997-11-28 1997-11-28 Circulation type water distribution system

Publications (1)

Publication Number Publication Date
JPH11158943A true JPH11158943A (en) 1999-06-15

Family

ID=18201248

Family Applications (1)

Application Number Title Priority Date Filing Date
JP32763497A Pending JPH11158943A (en) 1997-11-28 1997-11-28 Circulation type water distribution system

Country Status (1)

Country Link
JP (1) JPH11158943A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8491607B1 (en) 1998-07-15 2013-07-23 Astrazeneca Ab Elastic surgical ring clip/loader and a method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8491607B1 (en) 1998-07-15 2013-07-23 Astrazeneca Ab Elastic surgical ring clip/loader and a method

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