JPS62151699A - Shock absorber - Google Patents
Shock absorberInfo
- Publication number
- JPS62151699A JPS62151699A JP60291872A JP29187285A JPS62151699A JP S62151699 A JPS62151699 A JP S62151699A JP 60291872 A JP60291872 A JP 60291872A JP 29187285 A JP29187285 A JP 29187285A JP S62151699 A JPS62151699 A JP S62151699A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- block
- pressure fluid
- fluid connection
- capillary tube
- 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
Landscapes
- Fluid-Damping Devices (AREA)
- Pipe Accessories (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は、差圧伝送器、圧力伝送器等に着脱可能な緩衝
器に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a shock absorber that can be attached to and detached from a differential pressure transmitter, a pressure transmitter, or the like.
一般に差圧伝送器は、高圧側圧力と低圧側圧力の差圧を
検出する圧力センサと、過大圧力から圧力センサを保護
する過圧保護機構と、圧力センサが検出した出力（電気
信号）を補正、増幅、変換する電気回路部から構成され
ている。特に圧力センサと過圧保護機構は、被測定流体
に接液する２枚の隔液ダイアフラムと剛性の高い金属体
からなるケーシング内に収められ、圧力センサ、過圧防
止機構、隔液ダイアフラムは、高圧側と低圧側でそれぞ
れケーシング内に形成された通路によって結ばれ、これ
らケーシング内には非圧縮性の流体（例えばシリコーン
オイル）が封入されている。Generally, a differential pressure transmitter includes a pressure sensor that detects the differential pressure between high pressure side pressure and low pressure side pressure, an overpressure protection mechanism that protects the pressure sensor from excessive pressure, and a correction for the output (electrical signal) detected by the pressure sensor. It consists of an electric circuit section that performs , amplification, and conversion. In particular, the pressure sensor and overpressure protection mechanism are housed in a casing consisting of two liquid separation diaphragms that come into contact with the fluid to be measured and a highly rigid metal body. The high-pressure side and the low-pressure side are connected by passages formed within the casing, and an incompressible fluid (for example, silicone oil) is sealed within these casings.
差圧伝送器は、圧力、流量、液位の測定に使用されるが
、例えば水の流量を測定するような場合、給水ポンプ（
ブースタポンプも含む）の起動、停止や弁の急開、急閉
時などに、水撃によるかなり速くて大きな衝撃圧が発生
することがある。このようなＷＲ撃圧は、ライン圧の変
化量、気泡の含有量、配管の状態など条件によっている
いろと異なるが１時にはライン圧の１０倍以上の？＃撃
圧が発生することもある。Differential pressure transmitters are used to measure pressure, flow rate, and liquid level. For example, when measuring the flow rate of water, a water supply pump (
When a pump (including booster pumps) is started or stopped, or a valve is suddenly opened or closed, a fairly rapid and large shock pressure due to water hammer may be generated. This kind of WR impact pressure varies depending on conditions such as the amount of change in line pressure, the content of air bubbles, and the condition of the piping, but at 1 o'clock it is more than 10 times the line pressure. # Shock pressure may occur.
Ｌ記のような？ｆｒ ’ｌ圧が差圧伝送器に加わると、
過圧保護機構の応答が追いつけず過大な差圧が圧力セン
サに加わり、圧力センサが破損することになる。Like the Book of L? When fr 'l pressure is applied to the differential pressure transmitter,
The response of the overpressure protection mechanism cannot keep up and excessive differential pressure is applied to the pressure sensor, resulting in damage to the pressure sensor.
したがって、従来は隔液ダイアフラムと過圧保護機構、
または過圧保護機構と圧力センサを結ぶ通路の途中に絞
り穴を設け、衝撃圧を減衰させるようにしている。絞り
穴としては、細くて長い穴が必要であるが、加工面から
みれば径が小さいものであれば長さがとれず、径を大き
くした場合には相当長いものが必要となり、ケーシング
内の通路に設けられる絞り穴には限界がある。このため
。Therefore, conventionally, a liquid diaphragm and an overpressure protection mechanism,
Alternatively, a throttle hole is provided in the middle of the passage connecting the overpressure protection mechanism and the pressure sensor to attenuate the impact pressure. A narrow and long hole is required for the drawing hole, but from the perspective of machining, if the diameter is small, it will not be long enough, and if the diameter is increased, a considerably long hole will be required, and the inside of the casing will be damaged. There is a limit to the number of throttle holes that can be provided in the passage. For this reason.
絞り穴をケーシング内に設けただけでは、速くて大きな
衝撃圧に対しては効果が期待できない。Simply providing a throttle hole in the casing cannot be expected to be effective against fast and large impact pressures.
従来では、このような場合には、外付けの絞り（例えば
内径１ｍｍのキャピラリチューブ）を導圧配管の途中に
入れて衝撃圧を減衰させていたが、この場合にはキャピ
ラリチューブの内外壁に直接大きな差圧が加わり、配管
振動、外部打撃等によりキャピラリチューブの溶接部が
破損するという問題点がある。Conventionally, in such cases, an external restrictor (for example, a capillary tube with an inner diameter of 1 mm) was inserted in the middle of the pressure piping to dampen the impact pressure. There is a problem in that the welded portion of the capillary tube is damaged due to direct application of a large differential pressure, piping vibration, external impact, etc.
また、ケーシング内の通路にあまりきつい絞りを設ける
と、差圧伝送器の応答速度を遅くするとか、製作上加工
精度が要求されるとか、封入液が封入しくにい等の難点
が多い。Furthermore, if the passage in the casing is provided with a too tight restriction, there are many problems such as slowing down the response speed of the differential pressure transmitter, requiring high machining precision in manufacturing, and making it difficult to seal the liquid.
本発明の目的は、差圧伝送器、圧力伝送器等の圧力導入
口の外側部位に着脱自在なａｍ器を提供することにある
。SUMMARY OF THE INVENTION An object of the present invention is to provide an AM device that can be attached to and detached from a pressure introduction port of a differential pressure transmitter, a pressure transmitter, or the like.
本発明は、ブロックの圧力流体導入側に形成された圧力
流体接続口に連通したブロック内部の空洞部に格納され
たキャピラリチューブからなる絞り管路が、その一端を
前記空洞部内に開口し他端を前記ブロックの圧力流体導
出側に形成された圧力流体接続部の中心穴を気密に貫通
してブロック外に開口してなる緩衝器を実現したもので
、絞り管路のキャピラリチューブをブロックに固定した
溶接部が外部に露出していないので溶接部にリークが生
じても使用上差しつかえない２着脱が容易、既設の差圧
伝送器等にも取付は可能などの効果が得られる。In the present invention, a constricted conduit consisting of a capillary tube stored in a cavity inside the block communicating with a pressure fluid connection port formed on a pressure fluid introduction side of the block has one end opened in the cavity and the other end. This is a shock absorber formed by airtightly penetrating the center hole of the pressure fluid connection part formed on the pressure fluid outlet side of the block and opening to the outside of the block, and fixing the capillary tube of the throttle conduit to the block. Since the welded part is not exposed to the outside, even if a leak occurs in the welded part, it can be easily attached and detached, which is not a problem during use, and it can also be attached to an existing differential pressure transmitter.
以下、本発明の実施例を図面を参照して説明する。 Embodiments of the present invention will be described below with reference to the drawings.
本発明に係る緩衝器の一実施例を第１図に示す。An embodiment of a buffer according to the present invention is shown in FIG.
図示のように、緩衝器（１）は、中間ブロック（１１）
とアダプタ（２１）からなるブロック（１０）と、絞り
管路（３１）とから構成されている。As shown, the buffer (1) is connected to the intermediate block (11).
It consists of a block (10) consisting of an adapter (21) and a constriction pipe (31).
中間ブロック（１１）は、その圧力流体導出側端面には
、差圧伝送器（４０）の接液フランジ（４１）の圧力導
入口（４２）に嵌合する短円柱状突起に中心穴（１３）
が明けられた圧力流体接続部（１２）およびそれを囲む
Ｏリング（１４）が設けられており、中間ブロックの中
心部には、中心穴（１３）に連通し前記圧力導入口（４
２）と同一内径の空洞部（１５）が同心的に形成され他
端面に開口している。また、中間ブロック（１１）には
一対の締付ボルト挿通穴（Ｉ６）が空洞部（１５）の軸
線と平行に穿設されている。The intermediate block (11) has a center hole (13) on its end face on the pressure fluid outlet side and a short cylindrical projection that fits into the pressure inlet (42) of the wetted flange (41) of the differential pressure transmitter (40). )
A pressure fluid connection part (12) with a hole in it and an O-ring (14) surrounding it are provided, and the center part of the intermediate block is provided with a pressure fluid connection part (12) that communicates with the center hole (13) and the pressure inlet port (4).
A cavity (15) having the same inner diameter as 2) is formed concentrically and opens at the other end surface. Further, a pair of tightening bolt insertion holes (I6) are bored in the intermediate block (11) parallel to the axis of the cavity (15).
アダプタ（２１）は、その一端面には空洞部（１５）に
嵌合する短円柱状突起（２２）およびそれを囲むＯリン
グ（２３）が設けられており、他端面すなわち圧力流体
導入側端面には、管用ねし穴からなる圧力流体接続口（
２４）が形成され、この管用ねじ穴の下穴に段部（２５
）を介して径小の連通穴が短円柱状突起（２２）の端面
まで同心的に貫通して設けられている。The adapter (21) is provided with a short cylindrical projection (22) that fits into the cavity (15) and an O-ring (23) surrounding it on one end surface, and the other end surface, that is, the end surface on the pressure fluid introduction side. The pressure fluid connection (
24) is formed in the pilot hole of this pipe screw hole.
) A small diameter communication hole is provided concentrically penetrating to the end surface of the short cylindrical projection (22).
そして、管用ねじ穴の下穴の段部（２５）の所にはフィ
ルタ（２７）が取付けられている。また、アダプタ（２
１）には、一対の締付ボルト挿通穴（２６）が圧力流体
接続口（２４）の管用ねじ穴の軸線と平行に穿設されて
いる。A filter (27) is attached to the stepped portion (25) of the pilot hole of the pipe screw hole. In addition, the adapter (2
1), a pair of tightening bolt insertion holes (26) are bored parallel to the axis of the pipe threaded hole of the pressure fluid connection port (24).
絞り管路（３１）は、例えば外径３ｍｍ、内径１ｍｍの
キャピラリチューブをコイル状に巻いて作られ、中間ブ
ロック（１１）の空洞部（１５）に収められており、そ
の一端はキャピラリチューブが圧力流体接続口（１２）
の中心穴（１３）に内嵌挿入されて外部まで突出し、圧
力流体接続部（１２）の外面との間を溶接部（１７）に
より固定およびシールされ、他端は空洞部（１５）の下
端近傍でキャピラリチューブの開口端をアダプタ（２１
）の連通穴に向けて配置されている。The throttle tube (31) is made by winding a capillary tube with an outer diameter of 3 mm and an inner diameter of 1 mm into a coil shape, for example, and is housed in a cavity (15) of the intermediate block (11), with one end of which the capillary tube is wound. Pressure fluid connection port (12)
It is inserted into the center hole (13) and protrudes to the outside, and is fixed and sealed with the outer surface of the pressure fluid connection part (12) by the welding part (17), and the other end is the lower end of the cavity part (15). Nearby, connect the open end of the capillary tube with an adapter (21
) is placed facing the communication hole.
上記のように構成された本発明一実施例の緩衝器（１）
は、中間ブロック（１１）の圧力流体接続部（１２）を
差圧伝送器（４０）の接液フランジ（４１）の圧カ導入
口（４２）に嵌合させ、さらに、中間ブロック（１１）
の空洞部（１５）の下端にアダプタ（２１）の短円柱状
突起（２２）を嵌合させたうえ、一対の締付ボルト（５
１）により差圧伝送器（４０）の接液フランジ（４１）
に締付は固定することにより装着される。Buffer (1) of an embodiment of the present invention configured as described above
Fits the pressure fluid connection (12) of the intermediate block (11) into the pressure inlet (42) of the wetted flange (41) of the differential pressure transmitter (40), and then
The short cylindrical projection (22) of the adapter (21) is fitted into the lower end of the hollow part (15) of the adapter (21), and a pair of tightening bolts (5
1) Wetted flange (41) of differential pressure transmitter (40)
It is installed by tightening it.
アダプタ（２１）の圧力流体接続口（２４）に接続され
た導圧配管（図示してない）を介して導入された流体圧
力は１通常の状態（静的な圧力状態）では、入口側のア
ダプタ（２１）の圧力流体接続口（２４）と出口側の中
間ブロック（１１）の圧力流体接続部（１２）を介した
絞り管路（３１）の開口端間で圧力の基本成分は１：１
で伝達される（ただし高周波成分はカットされる）。そ
して、瞬間的（例えば２０ｍ５ｅｃ以内）に立上るよう
な衝撃圧や高周波の脈動圧に対しては、絞り管路（３１
）による減衰効果によりピークを形成する速い圧力成分
が除かれた静圧成分のみが緩衝器（１）の圧力流体導出
側に伝達されるので、差圧伝送器（４０）にダメージを
与えることが防止される。The fluid pressure introduced via the impulse piping (not shown) connected to the pressure fluid connection port (24) of the adapter (21) is 1. The basic component of the pressure between the pressure fluid connection (24) of the adapter (21) and the open end of the throttle line (31) via the pressure fluid connection (12) of the intermediate block (11) on the outlet side is 1: 1
(however, high frequency components are cut). The throttle pipe (31
), only the static pressure component from which the fast pressure component that forms the peak is removed is transmitted to the pressure fluid outlet side of the buffer (1), so there is no possibility of damaging the differential pressure transmitter (40). Prevented.
この実施例の緩衝器（１）は、差圧伝送器（４０）に−
切手を加える必要がなく、ただ付加的に取付けるだけで
よいので、既設の差圧伝送器にも取付可能である。また
、アダプタ（２１）は、差圧伝送器（４０）に今まで使
っていたものをそのまま使うことができる利点がある。The buffer (1) of this embodiment is connected to the differential pressure transmitter (40).
There is no need to add a stamp, just an additional attachment, so it can be attached to an existing differential pressure transmitter. Furthermore, the adapter (21) has the advantage that it can be used as is for the differential pressure transmitter (40).
２本の締付ボルト（５１）による固定であるから着脱が
容易でメンテナンスも楽である。従来の導圧配管の途中
にキャピラリチューブを設けるのと違って、絞り管路（
３１）が緩衝器（１）内部の空洞部（１５）に納められ
ており、絞り管路（３１）は圧力流体中に漬かっていて
外側からも圧力を加えられるので、コイルを変形させる
力が作用することがなく、溶接部（１７）の破損が防止
される。そして万一、溶接部（１７）にリークが生じて
も使用上差しつかえない。Since it is fixed with two tightening bolts (51), it is easy to attach and detach, and maintenance is also easy. Unlike the conventional capillary tube installed in the middle of the pressure piping, the constricted piping (
31) is housed in the cavity (15) inside the shock absorber (1), and the throttle pipe (31) is immersed in pressure fluid and pressure is applied from the outside, so the force that deforms the coil is This prevents damage to the welded portion (17). Even if a leak were to occur in the welded portion (17), there would be no problem in using it.
次に、本発明の変形例につき以下に説明する。Next, modified examples of the present invention will be described below.
（ａ）絞り管路の形状は第１図に示したものに限らず、
中間ブロック（１１）の空洞部（１５）に収まるもので
あれば、例えば第２図（ａ）、（ｂ）に示すような形状
の絞り管路（３２） 、 （３３）のようなものでもよ
い。(a) The shape of the throttle pipe is not limited to that shown in Figure 1,
As long as it can fit into the cavity (15) of the intermediate block (11), it may be the constricted pipes (32) and (33) shaped as shown in FIGS. 2(a) and (b), for example. good.
［ｂ）絞り管路のキャピラリチューブの材質は、錆びな
い金属材料であればよい。本実施例では、中間ブロック
（１１）およびアダプタ（２１）に５ＵＳ３１６を用い
ているので、キャピラリチューブも５ＵＳ３１６を用い
ている。[b) The material of the capillary tube of the throttle conduit may be any metal material that does not rust. In this example, since 5US316 is used for the intermediate block (11) and adapter (21), 5US316 is also used for the capillary tube.
〔ｃ〕絞り管路の取付けは、第３図に示すように、アダ
プタ（２１Ａ）の圧力流体接続口（２４）につながる連
通穴をキャピラリチューブが内嵌される穴径にして、そ
こに絞り管路（３１Ａ）のキャピラリチューブを内嵌挿
入し中間ブロック（ＩＩＡ）に対向するアダプタ（２１
Ａ）の端面側で溶接（２８） Ｌ、固定およびシールす
るようにしてもよい。さらに、振動のある場所に設置さ
れた差圧伝送器に対して用いる場合には、絞り管路のキ
ャピラリチューブ両端部をそれぞれ中間ブロックおよび
アダプタに溶接して固定し、外部振動の影響を受けにく
くすることもできる。[c] To install the constricted pipe, as shown in Fig. 3, set the diameter of the communication hole connected to the pressure fluid connection port (24) of the adapter (21A) to fit the capillary tube, and then install the constricted pipe there. Insert the capillary tube of the conduit (31A) into the adapter (21) facing the intermediate block (IIA).
A) may be fixed and sealed by welding (28) L on the end face side. Furthermore, when used for a differential pressure transmitter installed in a place with vibration, both ends of the capillary tube of the throttle conduit are welded and fixed to the intermediate block and adapter, respectively, making it less susceptible to external vibrations. You can also.
（ｄ）本発明に係る緩衝器は、差圧伝送器以外に、例え
ば圧力伝送器、液位伝送器にも同様に取付けて使用する
ことができる。(d) The buffer according to the present invention can be used by being attached to, for example, a pressure transmitter or a liquid level transmitter in addition to a differential pressure transmitter.
以上詳述したように本発明によれば、ブロックの圧力流
体導入側に形成された圧力流体接続口に連通したブロッ
ク内部の空洞部に格納されたキャピラリチューブからな
る絞り管路が、その一端を前記空洞部内に開口し他端を
前記ブロックの圧力流体導出側に形成された圧力流体接
続部の中心穴を気密に貫通してブロック外に開口してな
る緩衝器を実現したことにより、次のような効果が得ら
れる。As described in detail above, according to the present invention, a constricted conduit consisting of a capillary tube stored in a cavity inside the block communicating with a pressurized fluid connection port formed on the pressure fluid introduction side of the block has one end thereof By realizing a shock absorber having an opening in the cavity and the other end airtightly penetrating the center hole of a pressure fluid connection part formed on the pressure fluid outlet side of the block and opening outside the block, the following can be achieved. You can get an effect like this.
〔１〕絞り管路による減衰効果により、衝撃圧のピーク
を形成する速い圧力成分が除かれた静圧成分のみを緩衝
器の出口側に伝達するので、差圧伝送器、圧力伝送器等
にダメージを与えることを防止できる。[1] Due to the damping effect of the constricted pipe, only the static pressure component from which the fast pressure component that forms the peak of impact pressure is removed is transmitted to the outlet side of the buffer, making it suitable for differential pressure transmitters, pressure transmitters, etc. Can prevent damage.
〔２〕絞り管路がブロック内部の空洞部に格納されてい
るので、絞り管路は圧力流体中に漬かっていて外側から
も圧力を加えられるため絞り管路のコイルの形状を変形
させる力が作用することが・なく、溶接取付部の破損が
防止される。そして万一、取付溶接部にリークが生じて
も使用上差つかえない。[2] Since the throttle pipe is housed in the hollow part inside the block, the throttle pipe is immersed in the pressure fluid and pressure is applied from the outside, so there is a force that deforms the shape of the coil in the throttle pipe. This prevents damage to the welded attachment part. Even if a leak were to occur at the mounting weld, there would be no problem in use.
〔３〕差圧伝送器等に一切手を加える必要がなく、ただ
付加的に取付けられるので既設の差圧伝送器等にも容易
に取付可能である。[3] There is no need to modify the differential pressure transmitter, etc., and it can be simply attached additionally, so it can be easily attached to an existing differential pressure transmitter, etc.
〔４〕第１図の実施例のものでは、アダプタは今まで使
っていたものをそのまま使うことができるので低コスト
で実現できる。[4] In the embodiment shown in FIG. 1, the adapter that has been used up until now can be used as is, so it can be realized at low cost.
〔５〕絞り管路の絞り効果は、キャピラリチューブの口
径および長さを選ぶことにより所望の値に変えられる。[5] The throttling effect of the throttling channel can be changed to a desired value by selecting the diameter and length of the capillary tube.
〔６〕取付が２本の締付ボルトによる固定であるため、
着脱が容易でメンテナンスも楽である。[6] Since the installation is fixed with two tightening bolts,
Easy to put on and take off, and easy to maintain.
第１図は本発明に係る緩衝器の一実施例を示す要部断面
図、第２図（ａ）、（ｂ）はそれぞれ絞り管路の異なる
変形例を示す外観図、第３図は本発明に係る緩衝器の変
形例の要部を示す断面図である。FIG. 1 is a cross-sectional view of a main part showing one embodiment of a shock absorber according to the present invention, FIGS. 2(a) and (b) are external views showing different modifications of the throttle pipe, and FIG. It is a sectional view showing the main part of the modification of the shock absorber concerning the invention.
Claims (1)
に連通したブロック内部の空洞部に格納されたキャピラ
リチューブからなる絞り管路が、その一端を前記空洞部
内に開口し他端を前記ブロックの圧力流体導出側に形成
された圧力流体接続部の中心穴を気密に貫通してブロッ
ク外に開口してなる緩衝器。A constricted conduit consisting of a capillary tube stored in a cavity inside the block that communicates with a pressure fluid connection port formed on the pressure fluid introduction side of the block has one end opened into the cavity and the other end of the block. A shock absorber formed by airtightly penetrating the center hole of the pressure fluid connection part formed on the pressure fluid outlet side and opening to the outside of the block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60291872A JPS62151699A (en) | 1985-12-26 | 1985-12-26 | Shock absorber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60291872A JPS62151699A (en) | 1985-12-26 | 1985-12-26 | Shock absorber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62151699A true JPS62151699A (en) | 1987-07-06 |
Family
ID=17774525
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60291872A Pending JPS62151699A (en) | 1985-12-26 | 1985-12-26 | Shock absorber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62151699A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013024632A (en) * | 2011-07-19 | 2013-02-04 | Dai-Dan Co Ltd | Reference pressure measurement auxiliary tool and reference pressure measurement method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54157336A (en) * | 1978-06-02 | 1979-12-12 | Varian Associates | Pulse damper |
-
1985
- 1985-12-26 JP JP60291872A patent/JPS62151699A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54157336A (en) * | 1978-06-02 | 1979-12-12 | Varian Associates | Pulse damper |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013024632A (en) * | 2011-07-19 | 2013-02-04 | Dai-Dan Co Ltd | Reference pressure measurement auxiliary tool and reference pressure measurement method |
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