JP2000213685A - Orifice valve - Google Patents
Orifice valveInfo
- Publication number
- JP2000213685A JP2000213685A JP11015704A JP1570499A JP2000213685A JP 2000213685 A JP2000213685 A JP 2000213685A JP 11015704 A JP11015704 A JP 11015704A JP 1570499 A JP1570499 A JP 1570499A JP 2000213685 A JP2000213685 A JP 2000213685A
- Authority
- JP
- Japan
- Prior art keywords
- diameter
- orifices
- valve box
- pipe
- small
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、オリフィス弁に係
り、さらに詳しくは、水源下流域の水道需要量の変動に
伴って配管の口径を変更する場合、オリフィス弁を交換
することなく、オリフィス弁と配管の間に介在する管継
手を交換することで、配管の口径変更に対応することが
できるオリフィス弁に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an orifice valve, and more particularly to an orifice valve without changing the orifice valve when the pipe diameter is changed in accordance with a change in water demand in a downstream area of a water source. The present invention relates to an orifice valve capable of coping with a change in the diameter of a pipe by exchanging a pipe joint interposed between the pipe and the pipe.
【０００２】[0002]
【従来の技術】オリフィス弁は、図５に示すように、弁
箱１の軸線Ｃに平行な軸線Ｃ１を有する複数のオリフィ
ス２，２……を設けて弁箱１に昇降可能に収容された可
動多孔プレート３と、弁箱１の軸線Ｃに平行な軸線Ｃ１
を有する複数のオリフィス４，４……を設けて弁箱１に
固定して可動多孔プレート３の下流側に対向して摺接す
るように収容された固定多孔プレート５とを備え、複数
のオリフィス２，２……と複数のオリフィス４，４……
の断面形状は真円に設定されている。2. Description of the Related Art As shown in FIG. 5, an orifice valve is provided with a plurality of orifices 2, 2,... Having an axis C1 parallel to an axis C of a valve box 1, and housed in the valve box 1 so as to be able to move up and down. Movable porous plate 3 and axis C1 parallel to axis C of valve box 1
Are fixed to the valve box 1 and are fixed to the downstream side of the movable perforated plate 3 so as to be slidably opposed to the downstream side of the movable perforated plate 3. , 2 ... and multiple orifices 4, 4 ...
Is set to a perfect circle.
【０００３】可動多孔プレート３は弁棒６を介して開閉
手段（図示省略）に連結されている。したがって、開閉
手段の作動による可動多孔プレート３の昇降運動で、可
動多孔プレート３と固定多孔プレート５が相対移動し、
複数のオリフィス２，２……と複数のオリフィス４，４
……とを同心に対応させた全開状態と、複数のオリフィ
ス２，２……と複数のオリフィス４，４……との対向関
係を消失させた全閉状態が得られるとともに、全開状態
と全閉状態の間の任意の開度による流量制御を行うこと
ができる。The movable porous plate 3 is connected to opening / closing means (not shown) via a valve rod 6. Therefore, the movable perforated plate 3 and the fixed perforated plate 5 relatively move by the elevating movement of the movable perforated plate 3 by the operation of the opening / closing means,
A plurality of orifices 2, 2 ... and a plurality of orifices 4, 4
.. And a fully closed state in which the facing relationship between the plurality of orifices 2, 2 and the plurality of orifices 4, 4,... Is lost. The flow rate can be controlled by an arbitrary opening during the closed state.
【０００４】このように構成されたオリフィス弁は、た
とえば、水源と下流の水道水需要域（以下、下流域とい
う）とを結ぶ上水道配管（以下、配管という）に介設さ
れ、時間帯によって異なる使用水量の変動に対応して流
量制御を行う。The orifice valve configured as described above is provided, for example, in a water supply pipe (hereinafter, referred to as a pipe) connecting a water source and a downstream tap water demand area (hereinafter, referred to as a downstream area), and varies depending on a time zone. Flow rate control is performed according to the fluctuation of the used water amount.
【０００５】ところで、下流域の人口増加などに伴なっ
て使用水量が大幅に増大すると、配管が大口径配管に変
更される。しかし、従来のオリフィス弁は、弁箱１が配
管の口径に相当する口径Ｄを有し、かつ上流側の入口に
上流側配管７Ａのフランジ７ａに結合可能なフランジ１
Ａを有しているとともに、下流側端面に前記口径Ｄに相
当する口径Ｄを備えた管継手８の内端フランジ部８Ａを
結合し、外端フランジ部８Ｂに下流側配管７Ｂのフラン
ジ７ｂを結合する構造になっている。したがって、上流
側配管７Ａおよび下流側配管７Ｂが大口径配管に変更さ
れる場合には、オリフィス弁および管継手８をそれぞれ
大口径配管に対応する大きい口径のものに交換しなけれ
ばならない。[0005] Incidentally, when the amount of water used increases significantly due to an increase in the population in the downstream area, the pipes are changed to large-diameter pipes. However, in the conventional orifice valve, the valve box 1 has a diameter D corresponding to the diameter of the pipe, and the upstream inlet has a flange 1 that can be coupled to the flange 7a of the upstream pipe 7A.
A, the inner end flange portion 8A of the pipe joint 8 having the diameter D corresponding to the diameter D on the downstream end surface, and the flange 7b of the downstream pipe 7B connected to the outer end flange portion 8B. It has a structure to join. Therefore, when the upstream pipe 7A and the downstream pipe 7B are changed to large-diameter pipes, the orifice valve and the pipe joint 8 must be replaced with pipes each having a large diameter corresponding to the large-diameter pipe.
【０００６】[0006]
【発明が解決しようとする課題】すなわち、従来のオリ
フィス弁では、配管の口径変更に伴なって、その都度、
オリフィス弁を交換する必要があり、経済的な負担が大
きくなる問題点を有している。That is, in the conventional orifice valve, each time the pipe diameter is changed,
There is a problem that the orifice valve needs to be replaced, which increases the economic burden.
【０００７】そこで、本発明は、オリフィス弁の交換を
不要にし、弁箱の軸方向両端に接続される管継手のみを
交換することによって、配管の口径変更に対応すること
ができ、経済的な負担を軽減することができるオリフィ
ス弁を提供することを目的としている。Accordingly, the present invention makes it unnecessary to replace the orifice valve and replaces only the pipe joints connected to both ends in the axial direction of the valve box. It is an object of the present invention to provide an orifice valve that can reduce a burden.
【０００８】[0008]
【課題を解決するための手段】前記目的を達成するため
に、本発明に係るオリフィス弁は、大口径弁箱と、複数
のオリフィスを設けて前記大口径弁箱に収容された大径
固定プレートと、複数のオリフィスを設けて前記大口径
弁箱に進退移動可能に収容されるとともに、前記大径固
定プレートの軸方向一端面に対向して配置された大径可
動プレートとを備え、前記大口径弁箱の外周部に軸方向
のフランジ結合部が設けられ、このフランジ結合部の軸
方向両側に、前記大径固定プレートと大径可動プレート
それぞれの複数のオリフィスの通水断面積総和を大きく
して大口径配管に結合される大口径管継手または、前記
複数のオリフィスの通水断面積総和を縮小して小口径配
管に結合される小口径管継手のいずれかを選択してフラ
ンジ結合できるように構成されていることを特徴として
いる。To achieve the above object, an orifice valve according to the present invention comprises a large-diameter valve box, a large-diameter fixed plate provided with a plurality of orifices and housed in the large-diameter valve box. A large-diameter movable plate provided with a plurality of orifices and accommodated in the large-diameter valve box so as to be able to move forward and backward, and disposed opposite to one axial end surface of the large-diameter fixed plate. An axial flange coupling portion is provided on the outer peripheral portion of the diameter valve box. On both sides in the axial direction of the flange coupling portion, the total cross-sectional area of water passage of the plurality of orifices of the large-diameter fixed plate and the large-diameter movable plate is increased. A large diameter pipe joint coupled to a large diameter pipe or a small diameter pipe joint coupled to a small diameter pipe by reducing the sum of the cross-sectional areas of the plurality of orifices. Yo It is characterized in that it is configured to.
【０００９】本発明によれば、大口径弁箱のフランジ結
合部の軸方向両側に小口径管継手をフランジ結合し、複
数のオリフィスの通水断面積総和を縮小するとともに、
これら小口径管継手に小口径配管を接続することで小水
量の需要に対応できる。また、大口径弁箱のフランジ結
合部の軸方向両側に大口径管継手をフランジ結合し、複
数のオリフィスの通水断面積総和を大きくするととも
に、これら大口径管継手に大口径配管を接続することで
大水量の需要に対応できる。According to the present invention, a small-diameter pipe joint is flange-connected to both sides of the flange connection portion of the large-diameter valve box in the axial direction, thereby reducing the total cross-sectional area of water through the plurality of orifices.
By connecting a small-diameter pipe to these small-diameter pipe joints, it is possible to meet the demand for a small amount of water. In addition, large-diameter pipe joints are flanged on both axial sides of the flange connection part of the large-diameter valve box to increase the total cross-sectional area of water passage of a plurality of orifices, and connect large-diameter pipes to these large-diameter pipe joints. In this way, it is possible to meet the demand for large amounts of water.
【００１０】[0010]
【発明の実施の形態】以下、本発明の一実施の形態を図
面に基づいて説明する。なお、図５で説明した従来例と
同一もしくは相当部分には、同一符号を付して説明す
る。図１は本発明の一実施の形態を示す縦断面図であ
る。この図において、オリフィス弁は、口径Ｄを有する
大口径弁箱１の軸線Ｃに平行な軸線Ｃ１を有する複数の
オリフィス２，２……を設けて、大口径弁箱１に昇降可
能に収容された大径可動多孔プレート３と、大口径弁箱
１の軸線Ｃに平行な軸線Ｃ１を有する複数のオリフィス
４，４……を設けて、大径可動多孔プレート３の下流側
に対向して摺接するように大口径弁箱１に収容固定され
た大径固定多孔プレート５とを備え、複数のオリフィス
２，２……と複数のオリフィス４，４……の断面形状は
真円に設定されている。An embodiment of the present invention will be described below with reference to the drawings. The same or corresponding parts as those of the conventional example described with reference to FIG. FIG. 1 is a longitudinal sectional view showing one embodiment of the present invention. In this figure, the orifice valve is provided with a plurality of orifices 2, 2,... Having an axis C1 parallel to the axis C of the large-diameter valve box 1 having a diameter D, and is housed in the large-diameter valve box 1 so as to be able to move up and down. A large-diameter movable porous plate 3 and a plurality of orifices 4, 4... Having an axis C1 parallel to the axis C of the large-diameter valve box 1 are provided. A large-diameter fixed porous plate 5 housed and fixed in the large-diameter valve box 1 so as to be in contact with each other, and the cross-sectional shapes of the plurality of orifices 2, 2,... And the plurality of orifices 4, 4,. I have.
【００１１】大径可動多孔プレート３は弁棒６を介して
開閉手段（図示省略）に連結されている。したがって、
開閉手段の作動による大径可動多孔プレート３の昇降運
動で、大径可動多孔プレート３と大径固定多孔プレート
５が相対移動し、複数のオリフィス２，２……と複数の
オリフィス４，４……とを同心に対応させた全開状態
と、複数のオリフィス２，２……と複数のオリフィス
４，４……との対向関係を消失させた全閉状態が得られ
るとともに、全開状態と全閉状態の間の任意の開度によ
る流量制御を行うことができる。The large-diameter movable porous plate 3 is connected to opening / closing means (not shown) via a valve rod 6. Therefore,
The large-diameter movable porous plate 3 and the large-diameter fixed porous plate 5 are moved relative to each other by the elevating movement of the large-diameter movable porous plate 3 by the operation of the opening / closing means, and the plurality of orifices 2, 2,. , And a fully closed state in which the facing relationship between the plurality of orifices 2, 2,... And the plurality of orifices 4, 4,. The flow rate can be controlled by an arbitrary opening during the state.
【００１２】大口径弁箱１の外周部には、図２に示すよ
うに、円周方向で所定の間隔を有して軸方向に貫通する
複数個の貫通孔によってなるフランジ結合部９が設けら
れ、１対の小口径管継手１０，１０それぞれの内端フラ
ンジ部１０Ａを大口径弁箱１の軸方向両端面に当接さ
せ、図３に示すように、小口径管継手１０，１０それぞ
れの内端フランジ部１０Ａに設けた複数の貫通孔１０ａ
（ただし、図３には、小口径管継手１０，１０それぞれ
の内端フランジ部１０Ａに設けた１つの貫通孔１０ａの
みを示している）をフランジ結合部９に対向させて、ボ
ルト・ナットによってなる複数の締結部材１１，１１…
（ただし、図３には１つの締結部材１１のみを示してい
る）により、大口径弁箱１の軸方向両側に１対の小口径
管継手１０，１０をフランジ結合している。すなわち、
図１のように、小口径管継手１０，１０それぞれの内端
フランジ部１０Ａは、大口径弁箱１の外周部に設けたフ
ランジ結合部９に結合できるように大径に形成されてい
る。As shown in FIG. 2, on the outer peripheral portion of the large-diameter valve box 1, there is provided a flange connecting portion 9 having a plurality of through holes penetrating in the axial direction at predetermined intervals in the circumferential direction. The inner end flange portions 10A of the pair of small-diameter pipe joints 10 are brought into contact with both axial end surfaces of the large-diameter valve box 1, and as shown in FIG. A plurality of through holes 10a provided in the inner end flange portion 10A
(However, FIG. 3 shows only one through hole 10a provided in the inner end flange portion 10A of each of the small diameter pipe joints 10 and 10). A plurality of fastening members 11, 11 ...
(However, only one fastening member 11 is shown in FIG. 3), and a pair of small-diameter pipe joints 10 and 10 are flange-connected to both axial sides of the large-diameter valve box 1. That is,
As shown in FIG. 1, the inner end flange portion 10A of each of the small diameter pipe joints 10 and 10 is formed to have a large diameter so that it can be connected to a flange connection portion 9 provided on the outer peripheral portion of the large diameter valve box 1.
【００１３】１対の小口径管継手１０，１０は、大口径
弁箱１の口径Ｄよりも小さい口径Ｄ１を有し、内端フラ
ンジ部１０Ａが大口径弁箱１の外周部に設けたフランジ
結合部９に結合できるように大径に形成されているのに
対して、その外端には小径の外端フランジ部１０Ｂを設
けている。また、これら小口径管継手１０，１０が大口
径弁箱１の軸方向両側にフランジ結合されると、下流側
の小口径管継手１０の内端面における径内部分が、大径
固定多孔プレート５の複数のオリフィス４，４……にお
ける最外周域の複数のオリフィス４，４を閉塞して、複
数のオリフィス２，２……、４，４……の通水断面積総
和を縮小している。また、上流側に位置する小口径管継
手１０の小径の外端フランジ部１０Ｂには、口径Ｄ１が
小さい上流側配管７Ａのフランジ７ａが結合され、下流
側に位置する小口径管継手１０の小径の外端フランジ部
１０Ｂには、口径Ｄ１が小さい下流側配管７Ｂのフラン
ジ７ｂが結合される。The pair of small-diameter pipe joints 10 has a diameter D1 smaller than the diameter D of the large-diameter valve box 1, and the inner end flange portion 10A is provided on the outer periphery of the large-diameter valve box 1. A large-diameter outer end flange portion 10B is provided at the outer end of the large-diameter outer end flange 10B so as to be able to be coupled to the coupling portion 9. Further, when these small-diameter pipe joints 10 and 10 are flange-connected to both axial sides of the large-diameter valve box 1, the inner diameter of the downstream small-diameter pipe joint 10 at the inner end surface becomes large-diameter fixed porous plate 5. Of the plurality of orifices 4, 4... Of the outermost peripheral area are closed to reduce the total cross-sectional area of water passage of the plurality of orifices 2, 2,. . The small-diameter outer end flange portion 10B of the small-diameter pipe joint 10 located on the upstream side is coupled to the flange 7a of the upstream pipe 7A having a small diameter D1, and the small-diameter of the small-diameter pipe joint 10 located on the downstream side. The flange 7b of the downstream pipe 7B having a small diameter D1 is connected to the outer end flange portion 10B.
【００１４】このように、大口径弁箱１のフランジ結合
部９の軸方向両側に小口径管継手１０，１０をフランジ
結合し、複数のオリフィス２，２……、４，４……の通
水断面積総和を縮小するとともに、これら小口径管継手
１０，１０に小口径配管７Ａ，７Ｂを接続することで小
水量の需要に対応できる。As described above, the small-diameter pipe joints 10, 10 are flange-connected to both sides in the axial direction of the flange connection portion 9 of the large-diameter valve box 1, so that a plurality of orifices 2, 2,. By reducing the total water cross-sectional area and connecting the small-diameter pipes 7A and 7B to the small-diameter pipe joints 10 and 10, it is possible to meet the demand for a small amount of water.
【００１５】一方、図４に示すように、大口径弁箱１の
口径Ｄに相当する大きい口径Ｄの内端フランジ部１２Ａ
と、口径Ｄが大きい上流側配管１３Ａのフランジ１３ａ
および口径Ｄが大きい下流側配管１３Ｂのフランジ１３
ｂに結合可能な大径の外端フランジ部１２Ｂを設けた１
対の大口径管継手１２，１２を前述の小口径管継手１０
と同様の手段で大口径弁箱１の軸方向両側にフランジ結
合して、複数のオリフィス２，２……、４，４……の通
水断面積総和を大きくするとともに、これら大口径管継
手１２，１２に大口径配管１３Ａ，１３Ｂを接続するこ
とで大水量の需要に対応できる。On the other hand, as shown in FIG. 4, an inner end flange portion 12A having a large diameter D corresponding to the diameter D of the large diameter valve box 1 is formed.
And the flange 13a of the upstream pipe 13A having a large diameter D
13 of the downstream pipe 13B having a large diameter D
b provided with a large-diameter outer end flange portion 12B that can be connected to
The pair of large-diameter pipe joints 12 and 12 are
, Flange joints on both sides in the axial direction of the large-diameter valve box 1 to increase the total cross-sectional area of the plurality of orifices 2, 2,..., 4, 4,. By connecting the large-diameter pipes 13A and 13B to the pipes 12 and 12, it is possible to respond to a demand for a large amount of water.
【００１６】すなわち、本発明は、水源下流域の水道需
要量の変動に伴って小口径の配管７Ａ，７Ｂから大口径
の配管１３Ａ，１３Ｂに変更する場合、従来のようにオ
リフィス弁を交換することなく、オリフィス弁と配管７
Ａ，７Ｂ、１３Ａ，１３Ｂの間に介在する管継手１０，
１０、または１２，１２のみを交換することによって対
応できるので経済的な負担を軽減できる。That is, according to the present invention, when changing from small-diameter pipes 7A and 7B to large-diameter pipes 13A and 13B in accordance with fluctuations in water demand in the downstream area of the water source, the orifice valve is replaced as in the prior art. Without orifice valve and piping 7
A, pipe joint 10, interposed between 7B, 13A, 13B,
Since it can be dealt with by replacing only 10, 12, or 12, the economical burden can be reduced.
【００１７】[0017]
【発明の効果】以上説明したように、本発明は、配管の
口径変更にオリフィス弁と配管の間に介在する管継手の
みを交換することで対応できるので、オリフィス弁を交
換していた従来例と比較して、経済的な負担を軽減する
ことができる。As described above, the present invention can cope with the change of the pipe diameter by changing only the pipe joint interposed between the orifice valve and the pipe. As a result, the economic burden can be reduced.
【図１】本発明の一実施の形態を示す縦断面図である。FIG. 1 is a longitudinal sectional view showing one embodiment of the present invention.
【図２】弁箱に設けたフランジ結合部の一例を示す図１
のＡ−Ａ矢視図である。FIG. 2 shows an example of a flange connection portion provided on a valve box.
FIG.
【図３】大口径弁箱と管継手とのフランジ結合状態を示
す拡大部分断面図である。FIG. 3 is an enlarged partial cross-sectional view showing a state in which a large-diameter valve box and a pipe joint are connected to a flange.
【図４】本発明の他の実施の形態を示す縦断面図であ
る。FIG. 4 is a longitudinal sectional view showing another embodiment of the present invention.
【図５】従来例の縦断面図である。FIG. 5 is a longitudinal sectional view of a conventional example.
１ 大口径弁箱 ２ オリフィス ３ 大径可動多孔プレート（大径可動プレート） ４ オリフィス ５ 大径固定多孔プレート（大径固定プレート） ７Ａ 上流側の小口径配管 ７Ｂ 下流側の小口径配管 ９ フランジ結合部 １０ 小口径管継手 １２ 大口径管継手 １３Ａ 上流側の大口径配管 １３Ｂ 下流側の大口径配管 Reference Signs List 1 large-diameter valve box 2 orifice 3 large-diameter movable porous plate (large-diameter movable plate) 4 orifice 5 large-diameter fixed porous plate (large-diameter fixed plate) 7A upstream small-diameter pipe 7B downstream small-diameter pipe 9 flange connection Part 10 Small-diameter pipe joint 12 Large-diameter pipe joint 13A Large-diameter pipe on the upstream side 13B Large-diameter pipe on the downstream side
Claims (1)
て前記大口径弁箱に収容された大径固定プレートと、複
数のオリフィスを設けて前記大口径弁箱に進退移動可能
に収容されるとともに、前記大径固定プレートの軸方向
一端面に対向して配置された大径可動プレートとを備
え、前記大口径弁箱の外周部に軸方向のフランジ結合部
が設けられ、このフランジ結合部の軸方向両側に、前記
大径固定プレートと大径可動プレートそれぞれの複数の
オリフィスの通水断面積総和を大きくして大口径配管に
結合される大口径管継手または、前記複数のオリフィス
の通水断面積総和を縮小して小口径配管に結合される小
口径管継手のいずれかを選択してフランジ結合できるよ
うに構成されていることを特徴とするオリフィス弁。1. A large-diameter valve box, a large-diameter fixed plate provided with a plurality of orifices and housed in the large-diameter valve box, and a plurality of orifices provided and accommodated in the large-diameter valve box so as to be able to advance and retreat. A large-diameter movable plate disposed opposite to one end surface in the axial direction of the large-diameter fixed plate, and an axial flange coupling portion is provided on an outer peripheral portion of the large-diameter valve box; On both axial sides of the portion, the large-diameter fixed plate and the large-diameter movable plate each have a large-diameter pipe joint or a large-diameter pipe joint that is connected to a large-diameter pipe by increasing the total cross-sectional area of the orifices. An orifice valve configured to reduce the total cross-sectional area of water passage and to select one of small-diameter pipe couplings to be coupled to a small-diameter pipe and to perform flange coupling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11015704A JP2000213685A (en) | 1999-01-25 | 1999-01-25 | Orifice valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11015704A JP2000213685A (en) | 1999-01-25 | 1999-01-25 | Orifice valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000213685A true JP2000213685A (en) | 2000-08-02 |
Family
ID=11896168
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11015704A Pending JP2000213685A (en) | 1999-01-25 | 1999-01-25 | Orifice valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000213685A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008217278A (en) * | 2007-03-02 | 2008-09-18 | Kojiro Shimamoto | Variable orifice device |
| CN107489829A (en) * | 2017-10-13 | 2017-12-19 | 广东合力塑胶有限公司 | Enhanced high-pressure wash pipe |
-
1999
- 1999-01-25 JP JP11015704A patent/JP2000213685A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008217278A (en) * | 2007-03-02 | 2008-09-18 | Kojiro Shimamoto | Variable orifice device |
| CN107489829A (en) * | 2017-10-13 | 2017-12-19 | 广东合力塑胶有限公司 | Enhanced high-pressure wash pipe |
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