JP2983936B2 - Manufacturing method and product of water hammer - Google Patents
Manufacturing method and product of water hammerInfo
- Publication number
- JP2983936B2 JP2983936B2 JP9244670A JP24467097A JP2983936B2 JP 2983936 B2 JP2983936 B2 JP 2983936B2 JP 9244670 A JP9244670 A JP 9244670A JP 24467097 A JP24467097 A JP 24467097A JP 2983936 B2 JP2983936 B2 JP 2983936B2
- Authority
- JP
- Japan
- Prior art keywords
- water hammer
- piston
- pressure vessel
- open end
- cylinder
- 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.)
- Expired - Lifetime
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
- F16L55/04—Devices damping pulsations or vibrations in fluids
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pipe Accessories (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、主として給水、給湯配
管の流末器具近辺に取り付けて流末器具で発生した水撃
を吸収し、これを緩和乃至は防止する水撃防止器の製造
方法並びにその製法によって得られる水撃防止器に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a water hammer preventive device which is mainly attached to a water supply / hot water supply pipe near a flow end device to absorb a water hammer generated by the flow end device and to reduce or prevent the water hammer. In addition, the present invention relates to a water hammer preventing device obtained by the method.
【０００２】[0002]
【従来の技術】従来、この種の水撃防止器として、例え
ば図１０に示すように、シリンダ（イ）の一端に接続部
材（ロ）を、他端にバルブ（ホ）付きのシリンダキャッ
プ（ハ）を接続してなる圧力容器にピストン（ニ）を摺
動自在に嵌挿し、ピストン（ニ）のシリンダキャップ
（ハ）側に所定圧力の気体を封入したものが知られてお
り、上記接続部材（ロ）を配管の分岐部に接続すると、
水撃がピストン（ニ）の受圧面に作用し、ピストン
（ニ）が気体を圧縮することにより上記水撃のエネルギ
を吸収、緩和するというものである。この水撃防止器の
製造方法は、先ずシリンダ（イ）にピストン（ニ）を嵌
入し、次にシリンダ（イ）に接続部材（ロ）を嵌合して
ハンダ付けし、さらにシリンダキャップ（ハ）を嵌合し
てハンダ付けし、バルブ（ホ）から圧縮気体を注入して
最後にシリンダキャップ（ハ）に洩れ止め用のバルブキ
ャップ（ヘ）を嵌合するというものである。2. Description of the Related Art Conventionally, as a water hammer preventive of this type, for example, as shown in FIG. 10, a connecting member (b) is provided at one end of a cylinder (a) and a cylinder cap (v) is provided at the other end. It is known that a piston (d) is slidably fitted into a pressure vessel to which the connection (c) is connected, and a gas of a predetermined pressure is sealed in a cylinder cap (c) side of the piston (d). When the member (b) is connected to the branch of the pipe,
The water hammer acts on the pressure receiving surface of the piston (d), and the piston (d) compresses the gas to absorb and reduce the energy of the water hammer. According to the method for manufacturing the water hammer preventive device, first, a piston (d) is fitted into a cylinder (a), then a connecting member (b) is fitted and soldered to the cylinder (a), and further a cylinder cap (c) is fitted. ) Is fitted and soldered, compressed gas is injected from the valve (e), and finally a valve cap (f) for preventing leakage is fitted to the cylinder cap (c).
【０００３】また、同様に機能する水撃防止器の他の例
として図１１に示すように、シリンダ（チ）の一端に接
続部材（リ）を接続し、他端をクロージング又はハンダ
付け加工してなる圧力容器にピストン（ル）を摺動自在
に嵌挿し、ピストン（ル）のクロージング部（ヌ）側に
所定圧力の気体を封入したものも知られている。この水
撃防止器の製造方法は、先ずシリンダ（チ）に接続部材
（リ）を嵌合してハンダ付けし、次に圧縮気体の雰囲気
中でシリンダ（チ）にピストン（ル）を嵌入し、加圧し
た状態を維持しながら最後にクロージング部（ヌ）によ
って密封するというものである。[0003] As another example of a water hammer preventer functioning similarly, as shown in Fig. 11, a connecting member (ri) is connected to one end of a cylinder (h), and the other end is subjected to closing or soldering. It is also known that a piston (R) is slidably fitted in a pressure vessel made of such a gas and a gas of a predetermined pressure is sealed in the closing part (N) side of the piston (R). In this method of manufacturing a water hammer preventive device, first, a connecting member (R) is fitted to a cylinder (H) and soldered, and then a piston (L) is fitted to the cylinder (H) in a compressed gas atmosphere. Finally, while maintaining the pressurized state, sealing is finally performed by the closing part (nu).
【０００４】[0004]
【発明が解決しようとする課題】しかし上記した従来技
術の内、前者では熱接合箇所がシリンダ（イ）両端二箇
所にあるので、製造時に熱負荷によってピストン（ニ）
のパッキン（ト）が劣化するおそれがある。また、部品
点数が多いと共に製造工程数も多岐に亘り、生産コスト
が高くなる。さらに二つのハンダ付け箇所及びバルブ
（ホ）の併せて三箇所から封入気体が洩れる危険性があ
り、初期性能の維持が難しい。しかも、バルブ（ホ）付
きのシリンダキャップ（ハ）及び接続部材（ロ）のため
に水撃防止器の全長が長くなるという不利益もあった。However, in the prior art described above, in the former case, the thermal joints are located at two places at both ends of the cylinder (a).
Packing (g) may be deteriorated. In addition, the number of parts is large and the number of manufacturing steps is diversified, so that the production cost is high. Further, there is a danger that the sealed gas leaks from three locations including the two soldering locations and the valve (e), and it is difficult to maintain the initial performance. In addition, there is a disadvantage that the total length of the water hammer preventing device is increased due to the cylinder cap (c) with the valve (e) and the connecting member (b).
【０００５】一方、後者の従来技術では、圧縮気体の雰
囲気中でクロージング又はハンダ付け加工するので、作
業が困難であるし、このような熱負荷の高い作業をする
と前者の従来技術と同様、パッキン（ヲ）が高い熱負荷
によって劣化し易いという欠点も見られた。On the other hand, in the latter prior art, since the closing or soldering is performed in an atmosphere of a compressed gas, the operation is difficult. (ヲ) also had the disadvantage that it was easily degraded by high heat load.
【０００６】本発明は水撃防止器の製造工程に着目して
なされたものであり、その目的とするところは、ピスト
ン嵌入後において熱接合する箇所を皆無としてパッキ
ン、その他の部位に対する熱影響を解消すると共に、少
ない部品でもって洩れなどの危険箇所が少なく、且つコ
ンパクトな水撃防止器を提供することにあり、更に、そ
の水撃防止器を製造する方法として最適なものを提案す
ることにある。The present invention has been made with a focus on the manufacturing process of the water hammer preventive device, and has as its object to eliminate the thermal effect on the packing and other parts without any thermal bonding after the piston is inserted. In order to solve the problem, to provide a compact water hammer preventive device with few parts and few danger points such as leakage, and to propose an optimal method for manufacturing the water hammer preventive device. is there.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成するた
め、本発明の水撃防止器の製造方法は、一定長のガイド
シリンダの先端に、有底筒形の圧力容器の開放端を気密
に接続し、次いで大気圧下で上記ガイドシリンダに内嵌
されるピストンを挿入棒によって押入し、該ピストンが
圧力容器に嵌挿された時点でガイドシリンダを取除き、
圧力容器の開放端にピストンの抜け止め等の後処理を施
すという手段を採用したものである。In order to achieve the above object, a method for manufacturing a water hammer according to the present invention is characterized in that the open end of a bottomed cylindrical pressure vessel is hermetically sealed at the tip of a fixed length guide cylinder. Connected, then press the piston inserted into the guide cylinder under atmospheric pressure by an insertion rod, remove the guide cylinder when the piston is inserted into the pressure vessel,
This adopts a means of performing post-processing such as retaining the piston on the open end of the pressure vessel.
【０００８】また、本発明の水撃防止器は、有底筒形の
圧力容器と、この圧力容器内に摺動自在に嵌挿されたピ
ストンとを有し、その内空部に上記の製造方法によって
所定圧力の気体を封入してなる簡易な水撃防止器を前提
としたものであるが、その圧力容器の開放端に施される
ピストンの抜け止め等の後処理として、該開放端の周縁
を内方に屈曲した形態の縮径部を形成したもの（請求項
２）、及び圧力容器の開放端にピストンの直径よりも小
さい部位を有する接続部材を結合することによって抜け
止め機能を兼ねさせるという手段を用いたものである。The water hammer according to the present invention has a bottomed cylindrical pressure vessel and a piston slidably fitted in the pressure vessel, and the above-described manufacturing method is provided in the inner space thereof. Although it is based on a simple water hammer preventer in which gas of a predetermined pressure is sealed by the method, as a post-processing such as a stopper for a piston applied to an open end of the pressure vessel, the open end of the open end is A reduced diameter portion having a shape in which the peripheral edge is bent inward (Claim 2) and a connecting member having a portion smaller than the diameter of the piston are connected to the open end of the pressure vessel to also serve as a retaining function. This is a method of using
【０００９】[0009]
【作用】本発明の製造方法によれば、ガイドシリンダに
ピストンを嵌入する作業によって気体が大気圧から所定
圧力まで圧縮されて圧力容器に封入されるから、その作
業は終始、大気圧下で遂行されるし、またピストン嵌入
後に行われるカシメや接続部材の螺装等による開放端の
後処理を含めて熱接合を要する工程が皆無になるので、
熱負荷によるパッキン等が劣化するおそれもない。又、
水撃防止器が圧力容器とピストンのみで構成し得るので
部品点数が少なく、コンパクトな水撃防止器が得られる
上、内部の封入気体が洩れる可能性は極く限られた箇所
となるから、初期性能を容易に維続し得るという格別の
作用を有するのである。According to the manufacturing method of the present invention, the gas is compressed from the atmospheric pressure to a predetermined pressure by the operation of fitting the piston into the guide cylinder and sealed in the pressure vessel. In addition, since there is no need for a process that requires thermal bonding, including post-processing of the open end such as caulking or screwing of the connecting member performed after the piston is inserted,
There is no possibility that the packing or the like is deteriorated by the heat load. or,
Since the water hammer can be composed of only the pressure vessel and the piston, the number of parts is small, a compact water hammer is obtained, and the possibility of leakage of the sealed gas inside is extremely limited, It has a special effect that the initial performance can be easily maintained.
【００１２】[0012]
【実施例】先ず、本発明方法によって製造される水撃防
止器の１〜２の実施形態について説明すると、図１にお
ける符号１１は圧力容器であって、円筒状のシリンダ１
１ａと、その一端にロー付け又は螺合などによって気密
に結合されて有底筒形の容体を構成するシリンダキャッ
プ１１ｂとからなり、更にシリンダキャップ１１ｂの外
周部には雄ネジ１１ｄが切設される。又、上記圧力容器
１１内にはピストン１２が摺動自在に嵌挿され、上記シ
リンダ１１ａの底部をなすシリンダキャップ１１ｂとの
内空部に所定圧力の気体が封入されると同時に、シリン
ダ１１ａの他方の開放端には上記ピストン１２が嵌挿さ
れた後にカシメ加工等によって形成したピストン抜け止
め用の縮径部１１ｃが設けられる。尚、同図中１２ａは
ピストン１２外周の溝に装着されたパッキン、１２ｂは
ピストン受圧面を示す。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, a description will be given of first to second embodiments of the water hammer preventive device manufactured by the method of the present invention. In FIG.
1a and a cylinder cap 11b airtightly connected to one end of the cylinder cap 11b by brazing or screwing to form a bottomed cylindrical container. Further, an external thread 11d is provided on the outer periphery of the cylinder cap 11b. You. A piston 12 is slidably fitted into the pressure vessel 11, and a gas at a predetermined pressure is sealed in an inner space between the pressure vessel 11 and a cylinder cap 11b serving as a bottom of the cylinder 11a. The other open end is provided with a reduced diameter portion 11c for preventing the piston from coming off, which is formed by caulking after the piston 12 is fitted. In the drawing, reference numeral 12a denotes a packing mounted on a groove on the outer periphery of the piston 12, and 12b denotes a piston pressure receiving surface.
【００１３】この水撃防止器を使用する場合は、ピスト
ン受圧面１２ｂが流路に臨むように流路構成部材（図示
せず）に圧力容器１１を挿入し、シリンダキャップ１１
ｂの雄ネジ１１ｄを利用して流路構成部材に気密に装着
するのである。そうすることにより、流路内に水撃が発
生した場合に水圧がピストン１２の受圧面１２ｂに作用
し、ピストン１２が封入気体を圧縮して水撃エネルギを
吸収し、その衝撃を緩和乃至は防止するのである。When using the water hammer preventive device, the pressure vessel 11 is inserted into a flow path component (not shown) so that the piston pressure receiving surface 12b faces the flow path, and the cylinder cap 11
By using the male screw 11d of b, it is airtightly mounted on the flow path component. By doing so, when a water hammer occurs in the flow path, the water pressure acts on the pressure receiving surface 12b of the piston 12, the piston 12 compresses the sealed gas to absorb the water hammer energy, and reduces or reduces the impact. Prevent it.
【００１４】又、図２は本発明の製造方法によって得ら
れた水撃防止器の他の実施例を示したものである。同図
において２１は有底円筒形の圧力容器であって、シリン
ダ２１ａの一端を深絞り又は別途底材２１ｂによって閉
止した容体を成形し、その開放端に雄ネジ２１ｃを切設
すると同時に、該シリンダ内にピストン２２を摺動自在
に嵌挿し、その内空部に所定圧力の気体を封入した後、
開放端の上記雄ネジ部２１ｃに接続部材２３を螺装して
圧力容器としたものである。上記接続部材２３にはピス
トン２２の直径よりも小さいピストン係止部２３ａが形
成されており、ピストン２２の抜け止め機能が兼備され
る。尚、図中２２ａはピストン２２外周の溝に装着され
たパッキン、２２ｂは上記ピストンの受圧面を示す。FIG. 2 shows another embodiment of the water hammer preventing device obtained by the manufacturing method of the present invention. In the figure, reference numeral 21 denotes a cylindrical pressure vessel having a bottom, which is formed by deeply drawing one end of a cylinder 21a or forming a container closed by a bottom material 21b and cutting an external thread 21c at the open end thereof. After the piston 22 is slidably fitted in the cylinder and a gas of a predetermined pressure is sealed in the inner space thereof,
The connection member 23 is screwed into the male screw portion 21c at the open end to form a pressure vessel. The connection member 23 is formed with a piston locking portion 23a smaller than the diameter of the piston 22, and has a function of preventing the piston 22 from coming off. In the figure, reference numeral 22a denotes a packing mounted on a groove on the outer periphery of the piston 22, and 22b denotes a pressure receiving surface of the piston.
【００１５】この水撃防止器を使用する場合は、ピスト
ンの受圧面２２ｂが流路に臨むように接続部材２３を流
路構成部材に装着、固定する。そうすることで管内で発
生した水撃がピストン受圧面２２ｂに作用してピストン
２２が内部の気体を圧縮し、上記第１実施例の水撃防止
器と全く同様の作用効果が得られるのである。When using this water hammer preventive device, the connecting member 23 is mounted and fixed to the flow path constituting member so that the pressure receiving surface 22b of the piston faces the flow path. By doing so, the water hammer generated in the pipe acts on the piston pressure receiving surface 22b and the piston 22 compresses the gas inside, so that exactly the same effect as the water hammer preventer of the first embodiment can be obtained. .
【００１６】上記２つの実施例に示した水撃防止器は、
何れも有底円筒形の圧力容器１１・２１、ピストン１２
・２２およびシリンダキャップ１１ｂ若しくは接続部材
２３によって構成されるので、部品点数が少なくて済
み、しかも封入気体の漏洩可能性があるとすれば、その
範囲は極く僅かな箇所に絞られるので、初期性能を良好
に持続させることができるのである。また上記構成の水
撃防止器におけるシリンダキャップ１１ｂ又は接続部材
２３の何れもが、シリンダから突出する部分が少ないの
で、水撃防止器の全長が該シリンダ長に近似した長さに
収まり、水撃防止器がコンパクトに仕上がるのである。The water hammer shown in the above two embodiments is
Both are cylindrical pressure vessels 11 and 21 and a piston 12 with a bottom.
Since it is composed of the cylinder 22 and the cylinder cap 11b or the connecting member 23, the number of parts is small, and if there is a possibility of leakage of the sealed gas, the range is narrowed down to a very small part. Performance can be maintained satisfactorily. In addition, since the cylinder cap 11b or the connecting member 23 in the water hammer preventive device having the above-described configuration has a small portion protruding from the cylinder, the total length of the water hammer preventive is reduced to a length approximating the cylinder length. The protector is finished compactly.
【００１７】上述したような独自的な特徴を有する本発
明の水撃防止器の一つの製造方法を図３〜図６に従って
説明する。図３〜図６に示す製法は、前記第１実施例に
記載した構造の水撃防止器の製造に適用して有効な方法
で、図における１５は一定の長さを有するガイドシリン
ダであって、上記シリンダ１１ａの開放端に外嵌可能に
構成され、嵌合部はパッキン１５ａを介して気密に接合
されるが、両者の内径は完全に一致して上記接合部にお
いて面一となるように構成されている。又、１６は上記
ガイドシリンダ１５の一端から挿入される挿入棒で、ガ
イドシリンダ１５の他端開口からピストン１２を嵌入
し、該シリンダに挿入棒１６の先端を当てがった上、図
４に示すように大気圧下でピストン１２がガイドシリン
ダ１５を通過して圧力容器１１に嵌挿されるまで挿入棒
１６を押し込んでいくことにより、内部の空気が所定圧
力にまで圧縮されて圧力容器１１内に封入される。この
時点で挿入棒１６を残したままガイドシリンダ１５を後
退させてシリンダ１１ａとの接合を解き、その開放端に
後処理を施すのである。即ち、上記シリンダ１１ａの開
放端に臨んで図４に例示するような加工ローラ１７ａと
ガイドローラ１７ｂが対置されたカシメ装置１７によ
り、開放端の全周に亘って断面Ｕ字形の凹溝を形成した
後、図５〜図６に示すように突切りローラ１８によって
上記凹溝の中間部を切断して縮径部１１ｃを形成したも
のである。One method for manufacturing the water hammer according to the present invention having the unique features described above will be described with reference to FIGS. The manufacturing method shown in FIGS. 3 to 6 is an effective method applied to the manufacture of the water hammer preventing device having the structure described in the first embodiment. In FIG. 3, reference numeral 15 in the figure denotes a guide cylinder having a fixed length. The fitting portion is air-tightly joined via a packing 15a, but the inside diameters of both are completely matched to be flush with each other at the joining portion. It is configured. Reference numeral 16 denotes an insertion rod inserted from one end of the guide cylinder 15. The piston 12 is fitted through the other end opening of the guide cylinder 15, and the tip of the insertion rod 16 is applied to the cylinder. As shown, the piston 12 is pushed under the atmospheric pressure until the piston 12 passes through the guide cylinder 15 and is inserted into the pressure vessel 11 so that the air inside the vessel is compressed to a predetermined pressure and the inside of the pressure vessel 11 is compressed. It is enclosed in. At this time, the guide cylinder 15 is retracted while the insertion rod 16 is left to release the connection with the cylinder 11a, and the open end thereof is subjected to post-processing. That is, a concave groove having a U-shaped cross section is formed over the entire circumference of the open end by the caulking device 17 in which the processing roller 17a and the guide roller 17b are opposed to the open end of the cylinder 11a as illustrated in FIG. After that, as shown in FIGS. 5 and 6, an intermediate portion of the concave groove is cut by a parting-off roller 18 to form a reduced diameter portion 11c.
【００１８】次に、主として上記第２実施例に示した水
撃防止器の製造に適用される本発明の他の製造方法を図
７〜図９に基づいて説明すると、２５はガイドシリンダ
であって、先に述べた製造方法と同様に一端にパッキン
２５ａを介してシリンダ２１ａの開放端と気密に外嵌可
能な嵌合部を備えてなり、該嵌合部以外の内径はシリン
ダ２１ａの内径と完全に一致して面一に接合される。
又、２６は上記ガイドシリンダ２５の他端側開口から挿
入される挿入棒、２７は上記シリンダ２１ａ及びガイド
シリンダ２５を抱き込んで固定する保持部材であり、そ
の開口部近傍には直径方向に貫通して棒状のストッパ２
８を挿通自在とした透孔２７ａが設けられている。そし
て、上記ガイドシリンダ２５には先端から上方に向かっ
て一定の長さのスリット２５ｂを対設し、このスリット
が上記保持部材２７の上部に架設されるストッパ２８を
跨いで挿脱し得るようにした他、上記挿入棒２６にはシ
リンダ２１ａに対する上記ピストン２２の嵌挿終了位置
に見合って上記保持部材２７の透孔２７ａと連通するス
トッパ２８の挿通孔２６ａが貫設されている。Next, another manufacturing method of the present invention applied mainly to the manufacture of the water hammer preventive device shown in the second embodiment will be described with reference to FIGS. 7 to 9. Reference numeral 25 denotes a guide cylinder. In the same manner as in the above-described manufacturing method, a fitting portion is provided at one end of the cylinder 21a through a packing 25a so that the fitting portion can be airtightly fitted to the open end of the cylinder 21a. It is completely flush with and joined.
Reference numeral 26 denotes an insertion rod inserted from the other end of the guide cylinder 25, and reference numeral 27 denotes a holding member for holding and fixing the cylinder 21a and the guide cylinder 25. Rod-shaped stopper 2
8 is provided through which a through hole 27a can be inserted. The guide cylinder 25 is provided with a slit 25b having a certain length upward from the distal end thereof, and this slit can be inserted and removed across a stopper 28 provided above the holding member 27. In addition, an insertion hole 26a of a stopper 28 that communicates with a through hole 27a of the holding member 27 is formed through the insertion rod 26 at a position where the insertion of the piston 22 into the cylinder 21a ends.
【００１９】上述したような治具を使用して行う本発明
の製造方法では、先ず上記ガイドシリンダ２５の先端に
圧力容器２１の開放端を気密に接合し、両者を保持部材
２７で固定、支持する。しかる後、図７に破線で示すよ
うに上記ガイドシリンダ２５に嵌入したピストン２２に
挿入棒２６を当てがって同図に実線で示す位置、即ちピ
ストン２２がガイドシリンダ２５内を通過して圧力容器
２１側に嵌挿されるまで押込んでいき、この作業によっ
て内部の空気が大気圧から所定圧力まで圧縮されて圧力
容器２１内に封入される。この封入作業が終った時点で
図８に示すように、その挿入棒２６を挿通孔２６ａに挿
入されるストッパ２８によって保持部材２７に固定する
一方、該ストッパ２８を跨ぐスリット２５ｂを利用して
ガイドシリンダ２５を抜き外し、それに代わって挿入棒
２６を介して導入される接続部材２３を圧力容器２１に
螺装する（図９参照）。In the manufacturing method of the present invention using the above-described jig, first, the open end of the pressure vessel 21 is air-tightly joined to the tip of the guide cylinder 25, and both are fixed and supported by the holding member 27. I do. Thereafter, as shown by the broken line in FIG. 7, the insertion rod 26 is applied to the piston 22 fitted in the guide cylinder 25, and the position shown by the solid line in FIG. It is pushed in until it is inserted into the container 21 side, and the air inside is compressed from atmospheric pressure to a predetermined pressure by this operation, and is sealed in the pressure container 21. At the end of this enclosing operation, as shown in FIG. 8, the insertion rod 26 is fixed to the holding member 27 by a stopper 28 inserted into the insertion hole 26a, and a guide 25 is provided using a slit 25b straddling the stopper 28. The cylinder 25 is removed and the connecting member 23 introduced via the insertion rod 26 is screwed into the pressure vessel 21 instead (see FIG. 9).
【００２０】上記製造方法によれば、いづれの方法を選
択してもピストンによる気体の封入から、気体封入後に
おけるシリンダ開放端のカシメ等による縮径部１１ｃの
成形（第１実施例）、又は接続部材２３の螺装（第２実
施例）等の後処理までの諸工程が終始、大気圧下で遂行
可能であり、この間に熱接合を要する工程が皆無である
から、この種水撃防止器の製造が簡単で作業性が著しく
向上する。According to the above manufacturing method, no matter which method is selected, the gas is sealed by the piston, the reduced diameter portion 11c is formed by caulking the open end of the cylinder after the gas is sealed (first embodiment), or Since various steps up to post-processing such as screwing of the connection member 23 (second embodiment) can be performed at atmospheric pressure throughout, and there is no step requiring thermal bonding during this time, this kind of water hammer prevention The manufacture of the vessel is simple and workability is remarkably improved.
【００２１】[0021]
【発明の効果】以上詳述したように、本発明に係る水撃
防止器の製造方法は、ガイドシリンダの先端に上記圧力
容器の開放端を気密に接続し、次いで大気圧下でピスト
ンを嵌入した上、ガイドシリンダを介して該ピストンを
圧力容器内に押入することによって圧力容器の内空部に
所定圧の気体を容易に封入可能とし、その後圧力容器の
開放端をカシメ又は接続部材の螺装による後処理を施す
だけの簡単な作業工程で目的の水撃防止器が得られる
他、少なくともピストンの嵌挿後においては熱接合等の
加熱工程が一切含まれないので、パッキンその他の部材
の劣化等を確実に防止できるという顕著な効果が得られ
る。As described above in detail, in the method for manufacturing a water hammer according to the present invention, the open end of the pressure vessel is air-tightly connected to the tip of the guide cylinder, and then the piston is inserted under atmospheric pressure. Then, by pushing the piston into the pressure vessel through a guide cylinder, gas at a predetermined pressure can be easily filled in the inner space of the pressure vessel, and then the open end of the pressure vessel is swaged or a screw of a connection member is screwed. The target water hammer preventer can be obtained by a simple work process of only performing post-processing by mounting, and at least after the insertion of the piston, no heating process such as thermal bonding is included. A remarkable effect that deterioration and the like can be surely prevented can be obtained.
【００２２】更に本発明の製造方法によって得られた水
撃防止器は、有底筒形の圧力容器の、開放端をピストン
嵌入後に縮径部若しくは接続部材による後処理を行うも
のであるから、主要部品の数を大幅に減らしてこの種水
撃防止器のコンパクト化を可能にしただけでなく、熱接
合箇所が皆無であり、従ってパッキン等の熱劣化による
内部気体の漏洩などの事故や故障も少なく、初期性能を
長期間持続できる水撃防止器を安価に提供し得るなど、
多くの優れた効果を有するものである。Furthermore, the water hammer preventer obtained by the manufacturing method of the present invention is for performing post-processing by a reduced diameter portion or a connecting member after the piston is inserted into the open end of the bottomed cylindrical pressure vessel. Not only has the number of main parts been greatly reduced to make this type of water hammer preventer compact, but there are no thermal joints, so accidents and failures such as leakage of internal gas due to thermal deterioration of packing etc. It can provide a low cost water hammer that can maintain the initial performance for a long time,
It has many excellent effects.
【図１】水撃防止器の一つの実施例を示す一部縦断側面
図、FIG. 1 is a partially longitudinal side view showing one embodiment of a water hammer prevention device;
【図２】水撃防止器の他の実施例を示す一部縦断側面
図、FIG. 2 is a partially longitudinal side view showing another embodiment of the water hammer prevention device;
【図３】水撃防止器の一つの製造方法におけるピストン
嵌入工程を示す縦断側面図、FIG. 3 is a longitudinal sectional side view showing a piston fitting step in one method of manufacturing a water hammer preventer.
【図４】同製造方法におけるカシメ工程を示す縦断側面
図、FIG. 4 is a longitudinal side view showing a caulking step in the manufacturing method.
【図５】同製造方法における突切り工程を示す縦断側面
図、FIG. 5 is a longitudinal sectional side view showing a parting-off step in the manufacturing method.
【図６】同製造方法における後処理工程を示す縦断側面
図、FIG. 6 is a vertical sectional side view showing a post-processing step in the manufacturing method.
【図７】水撃防止器の他の製造方法におけるピストン嵌
入工程を示す縦断側面図、FIG. 7 is a longitudinal sectional side view showing a piston fitting step in another method of manufacturing the water hammer preventing device.
【図８】同製造方法における中間工程を示す縦断側面
図、FIG. 8 is a vertical sectional side view showing an intermediate step in the manufacturing method.
【図９】同製造方法における後処理工程を示す縦断側面
図、FIG. 9 is a vertical sectional side view showing a post-processing step in the manufacturing method.
【図１０】従来の水撃防止器の一例を示す一部縦断側面
図、FIG. 10 is a partially longitudinal side view showing an example of a conventional water hammer preventer.
【図１１】従来の水撃防止器の他の例を示す一部縦断側
面図である。FIG. 11 is a partially longitudinal side view showing another example of the conventional water hammer prevention device.
１１・２１ 圧力容器 １１ａ・２１ａ シリンダ １１ｃ 縮径部 １２・２２ ピストン １２ａ・２２ａ パッキン １５・２５ ガイドシリンダ ２３ 接続部材 11 ・ 21 Pressure vessel 11a ・ 21a Cylinder 11c Reduced diameter part 12 ・ 22 Piston 12a ・ 22a Packing 15.25 Guide cylinder 23 Connecting member
フロントページの続き (72)発明者 橋岡 由男 大阪市平野区瓜破南２丁目１番56号 株 式会社タブチ内 (56)参考文献 特開 昭50−30121（ＪＰ，Ａ) 実開 昭63−89495（ＪＰ，Ｕ) 実開 昭62−133001（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.6，ＤＢ名) F16L 55/04 Continuation of the front page (72) Inventor Yoshio Hashioka 2-56, Urashinami, Hirano-ku, Osaka-shi Inside Tabuchi Co., Ltd. (56) References JP-A-50-30121 (JP, A) 89495 (JP, U) Shokai Sho 62-133001 (JP, U) (58) Field surveyed (Int. Cl. 6 , DB name) F16L 55/04
Claims (3)
在に嵌挿されたピストンとを有し、その内空部に所定圧
力の気体を封入してなる水撃防止器において、上記圧力
容器の開放端に、これと同一内径を有する一定長のガイ
ドシリンダを気密に接続し、大気圧下で上記ガイドシリ
ンダに内嵌されるピストンを押入し、該ピストンが圧力
容器内に挿入された時点でガイドシリンダを除去した
後、圧力容器の開放端に後処理を施すことを特徴とした
水撃防止器の製造方法。1. A water hammer preventer having a bottomed cylindrical pressure vessel and a piston slidably fitted in the vessel, wherein a gas of a predetermined pressure is sealed in an inner space thereof. In the pressure vessel, a fixed length guide cylinder having the same inner diameter as the open end of the pressure vessel is airtightly connected, and a piston fitted into the guide cylinder at atmospheric pressure is pushed in. A method for manufacturing a water hammer preventive device, comprising: after removing a guide cylinder at a time when the guide cylinder is inserted, performing post-processing on an open end of the pressure vessel.
の圧力容器開放端の後処理が、該開放端の周縁を内方に
屈曲した縮径部である水撃防止器。2. A water hammer according to claim 1, wherein the post-treatment of the pressure vessel open end of the water hammer obtained by the method according to claim 1 is a reduced diameter portion in which the periphery of the open end is bent inward.
の圧力容器開放端の後処理が、ピストン径よりも小さい
部位を有する接続部材の装着である水撃防止器。3. The water hammer according to claim 1, wherein the post-processing of the pressure vessel open end of the water hammer obtained by the method according to claim 1 is mounting of a connecting member having a portion smaller than a piston diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9244670A JP2983936B2 (en) | 1997-08-25 | 1997-08-25 | Manufacturing method and product of water hammer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9244670A JP2983936B2 (en) | 1997-08-25 | 1997-08-25 | Manufacturing method and product of water hammer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1082495A JPH1082495A (en) | 1998-03-31 |
| JP2983936B2 true JP2983936B2 (en) | 1999-11-29 |
Family
ID=17122211
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9244670A Expired - Lifetime JP2983936B2 (en) | 1997-08-25 | 1997-08-25 | Manufacturing method and product of water hammer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2983936B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101147479B1 (en) | 2010-01-28 | 2012-05-21 | 김학렬 | Manufacturing method for integral water hammer arrester |
-
1997
- 1997-08-25 JP JP9244670A patent/JP2983936B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101147479B1 (en) | 2010-01-28 | 2012-05-21 | 김학렬 | Manufacturing method for integral water hammer arrester |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH1082495A (en) | 1998-03-31 |
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