JPS61169734A - Water leakage detector - Google Patents
Water leakage detectorInfo
- Publication number
- JPS61169734A JPS61169734A JP1006485A JP1006485A JPS61169734A JP S61169734 A JPS61169734 A JP S61169734A JP 1006485 A JP1006485 A JP 1006485A JP 1006485 A JP1006485 A JP 1006485A JP S61169734 A JPS61169734 A JP S61169734A
- Authority
- JP
- Japan
- Prior art keywords
- water
- pipe
- heater
- bypass pipe
- water supply
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/002—Investigating fluid-tightness of structures by using thermal means
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、給湯器等の漏水検知装置に関するものである
。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a water leak detection device for water heaters and the like.
従来の技術
近年、漏水検知装置は、給湯器等、水配管の必要とされ
る広い分野で必要とされてきている。特に集合住宅等で
は、水配管及び、水を使用する機器等からの漏水が、大
きな問題に直結することもあり、適切でかつ簡便な、漏
水検知装置の開発への要望が高まってきている。2. Description of the Related Art In recent years, water leakage detection devices have been required in a wide range of fields where water piping is required, such as water heaters. Especially in apartment complexes, water leakage from water piping and equipment that uses water can directly lead to major problems, and there is an increasing demand for the development of appropriate and simple water leakage detection devices.
以下、図面を参照しながら、上述した漏水検知装置の一
例について説明する。Hereinafter, an example of the water leak detection device mentioned above will be explained with reference to the drawings.
第２図は、従来の漏水検知装置の概略図を示すものであ
る。第２図において、１１は給湯器、１２！ｉ袷湯器１
２の給水口であり、１３は同じく給湯器１２の給湯口で
ある。１４は給湯口１３側のバルブであり、同じく１６
は、給水口１２側のバルブである。１６は給湯器１１に
給水するために配管されている水道等の給水管であり、
給水管１６途中には、水道用の減圧逆止弁１７が設けら
れている。１８ｔ′ｉ圧カセンサであり、前記給水管１
６に設置されており、給水管１６内の水圧を検知するも
のである。１９は漏水判定部であり、前記圧力センサ１
８と電気的に配線されている。FIG. 2 shows a schematic diagram of a conventional water leak detection device. In Figure 2, 11 is the water heater, 12! i-tanyu 1
2 is a water supply port, and 13 is a water supply port of the water heater 12 as well. 14 is a valve on the hot water supply port 13 side, and 16 is also a valve on the hot water supply port 13 side.
is a valve on the water supply port 12 side. 16 is a water supply pipe, such as a water supply pipe, which is piped to supply water to the water heater 11;
A pressure reducing check valve 17 for water supply is provided in the middle of the water supply pipe 16. 18t'i pressure sensor, and the water supply pipe 1
6 to detect the water pressure inside the water supply pipe 16. 19 is a water leak determination section, and the pressure sensor 1
8 and is electrically wired.
以上のように構成された漏水検知装置について、以下そ
の動作について説明する。The operation of the water leak detection device configured as described above will be described below.
給湯器１１け、給水口１２より給水された水を加熱し、
給湯口１３より給湯することのできるものである。この
場合、給水口１２側及び、給湯口１３側両方にバルブ１
４．１５が設けられてあり、一旦給湯器１１に給水され
た後は両バルブ１４゜１５共閉めることにより、給湯器
１１は密閉容器となりうる構成となっている。一方給水
口１２け、水道管等の給水管１６と配管されている。給
水管１６の内圧は、前記バルブ１５上流側に設けられた
水道用の減圧逆止弁１７にて０．６に９／ＣＨＩゲージ
圧に調整されている。圧力センサ１Ｂは、前記バルブ１
４．１５間に構成される、閉ざされた水配管内に設けら
れている。従って、圧力センサ１８はバルブ１４．１５
間に構成されている、給湯器１１及び水配管部に負荷さ
れている水圧を常時計測しうるものである。又、前記圧
力センサ１８は、漏水判定部１９と電気的に配線されて
いる。この漏水判定部１９は、圧力センサ１８から送ら
れてくる微小電圧をもとに、圧力変化を判定する機能を
有するものである。この様に構成することにより、前記
バルブ１４．１５間の水配管部及び給湯器１１で漏水が
生じた場合、水道用の減圧逆止弁１７で０．６！ｃｇ／
ｃｄゲージ圧にて調整されていた水圧に変化が生じると
いう現象を利用することで、漏水検知を行うことができ
るものである。11 water heaters heat the water supplied from the water supply port 12,
Hot water can be supplied from the hot water supply port 13. In this case, valve 1 is installed on both the water supply port 12 side and the hot water supply port 13 side.
4.15, and once water is supplied to the water heater 11, by closing both valves 14 and 15, the water heater 11 can become an airtight container. On the other hand, 12 water supply ports are connected to a water supply pipe 16 such as a water pipe. The internal pressure of the water supply pipe 16 is adjusted to 9/CHI gauge pressure of 0.6 by a water pressure reducing check valve 17 provided upstream of the valve 15. The pressure sensor 1B is connected to the valve 1
It is installed in a closed water pipe constructed between 4.15 and 15 minutes. Therefore, the pressure sensor 18 is connected to the valve 14.15.
It is possible to constantly measure the water pressure applied to the water heater 11 and the water piping section, which are configured between the two. Further, the pressure sensor 18 is electrically wired to a water leakage determining section 19. The water leak determination section 19 has a function of determining pressure changes based on the minute voltage sent from the pressure sensor 18. With this configuration, if water leaks in the water piping section between the valves 14 and 15 and the water heater 11, the pressure reducing check valve 17 for water supply will have a 0.6! cg/
Water leakage can be detected by utilizing the phenomenon that a change occurs in the water pressure that has been adjusted using the CD gauge pressure.
発明が解決しようとする問題点
しかしながら上記のような構成では、漏水検知部は、配
管構成上、密閉状態としておかねばならず、従って限ら
れた箇所の漏水検知しかできないという問題点を有して
いた。Problems to be Solved by the Invention However, with the above configuration, the water leak detection section has to be kept in a sealed state due to the piping configuration, and therefore has the problem that water leakage can only be detected in limited locations. Ta.
本発明は上記問題点に鑑み、適切かつ簡便で凡用性のあ
る漏水検知装置を提供するものである。In view of the above-mentioned problems, the present invention provides an appropriate, simple, and versatile water leak detection device.
問題点を解決するための手段
上記問題点を解決するために本発明の漏水検知装置は、
給水管の途中に、給水管から分岐したバイパス管を形成
し、前記バイパス管の途中に、加熱装置を設け、かつ前
記加熱装置の入口側と出口側に水温検知素子を設けると
いう構成としたものである。Means for Solving the Problems In order to solve the above problems, the water leakage detection device of the present invention has the following features:
A bypass pipe branched from the water supply pipe is formed in the middle of the water supply pipe, a heating device is provided in the middle of the bypass pipe, and water temperature detection elements are provided on the inlet and outlet sides of the heating device. It is.
作 用
本発明は上記した構成によって、漏水により生ずる、バ
イパス管内の微少な流れを、バイパス管の途中に設けた
加熱装置入口のバイパス管内の水温と、加熱装置出口の
バイパス管内の水温を比較することで検知できるように
したものである。即ち、バイパス管内に微少な流れがあ
る場合、加熱装置出口のバイパス管内の水温は、加熱装
置入口のバイパス管内の水温より高くなる現象を利用す
ることで、漏水検知ができるようにしたものである。こ
のため、従来の漏水検知装置では、給水管内の内圧の変
化を検知して漏水の検知を行っていたため、配管構成上
、漏水検知部は、一旦密閉構造としなければならなかっ
たため、非常に限られた箇所の漏水検知しかできなかっ
たのに対し、本発明の構成を用いることにより、設置場
所にとられれることなく、幅広い箇所の漏水検知ができ
るようになるとともに１使い勝手が向上されるため、非
常に有効な漏水検知となるものである。Effect The present invention uses the above-described configuration to compare the minute flow in the bypass pipe caused by water leakage with the water temperature in the bypass pipe at the inlet of the heating device provided in the middle of the bypass pipe and the water temperature in the bypass pipe at the exit of the heating device. This makes it possible to detect this. In other words, water leakage can be detected by utilizing the phenomenon that when there is a slight flow in the bypass pipe, the water temperature in the bypass pipe at the outlet of the heating device becomes higher than the water temperature in the bypass pipe at the entrance of the heating device. . For this reason, conventional water leakage detection devices detect water leakage by detecting changes in the internal pressure within the water supply pipes.Due to the piping configuration, the water leakage detection part had to be of a sealed structure, which was extremely limited. However, by using the configuration of the present invention, it is possible to detect water leaks in a wide range of locations without having to worry about installation locations, and the ease of use is improved. , which is a very effective water leak detection method.
実施例
以下本発明の一実施例の漏水検知装置を、図面を参照し
ながら説明する。EXAMPLE Hereinafter, a water leak detection device according to an example of the present invention will be described with reference to the drawings.
第１図は本発明の漏水検知装置の一実施例の概略図を示
すものである。第１図において１は給湯器、２Ｉ／ｉ給
湯器の給水口、３Ｆｉ同じく給湯器１の給湯口、４はバ
ルブ、５ａは給水管、５ｂはバイパス管、６ａ 、６ｂ
は水温検知素子、７け加熱装置、８は漏水判定部、９／
ｆｉ流速開閉弁を示す。以上のように構成された漏水検
知装置について、その動作を説明する。給湯器１は、給
水口２より給水された水を加熱し、給湯口３より給湯す
ることのできるものである。この場合、給湯口ａ側にバ
ルブ４を設けであることで、先止め配管となっている。FIG. 1 shows a schematic diagram of an embodiment of the water leakage detection device of the present invention. In Fig. 1, 1 is the water heater, 2 is the water inlet of the I/i water heater, 3 is the water inlet of the water heater 1, 4 is the valve, 5a is the water supply pipe, 5b is the bypass pipe, 6a, 6b
7 is the water temperature detection element, 7 is the heating device, 8 is the water leak detection unit, 9/
fi flow rate on/off valve is shown. The operation of the water leak detection device configured as described above will be explained. The water heater 1 is capable of heating water supplied from a water supply port 2 and supplying hot water from a hot water supply port 3. In this case, by providing the valve 4 on the hot water supply port a side, the piping is first stopped.
一方給水口２は水道管等の給水管５ａと配管されている
。また、バイパス管５ｂ＃−１、給水管５ａの途中より
分岐して設けてあり、パスパス管５ｂの管径は給水管５
ａの管径より細くなっている。またバイパス管５ｂの途
中には、バイパス管５ｂ内の水を電気ヒータ等で加熱す
ることのできる加熱装置７がバイパス管５ｂ表面の一部
をおおうように設けられており、常に、バイパス管５ｂ
内の水を、小電力で加熱している。水温検知素子６ａ、
６ｂは、加熱装置７の入口側と出口側の、バイパス管５
ｂ内の水温を測定しうるものであり、バイパス管５ｂ内
の水に直接接触する様に設置しである。又この水温検知
素子６ａ、６ｂＦｉ、加熱装置７の中心部から、等しい
距離に設置されである。水温検知素子６ｍ 、６ｂが検
知した水温は、微少電圧にて漏水判定部８に送られる。On the other hand, the water supply port 2 is connected to a water supply pipe 5a such as a water pipe. In addition, the bypass pipe 5b #-1 is provided to branch from the middle of the water supply pipe 5a, and the diameter of the bypass pipe 5b is the same as that of the water supply pipe 5a.
It is thinner than the pipe diameter of a. Further, a heating device 7 capable of heating the water in the bypass pipe 5b with an electric heater or the like is installed in the middle of the bypass pipe 5b so as to cover a part of the surface of the bypass pipe 5b.
The water inside is heated using a small amount of electricity. water temperature detection element 6a,
6b is a bypass pipe 5 on the inlet side and outlet side of the heating device 7.
It can measure the water temperature in the bypass pipe 5b, and is installed so as to be in direct contact with the water in the bypass pipe 5b. The water temperature detection elements 6a and 6bFi are placed at the same distance from the center of the heating device 7. The water temperature detected by the water temperature detection elements 6m and 6b is sent to the water leak determination section 8 using a very small voltage.
漏水判定部８１１、水温検知素子６ａ 、６ｂから送ら
れてくる微少電圧を常に監視できるものである。更にバ
イパス管５ｂと分岐した直後の給水管５ａ内には、流速
開閉弁９が設けられており、給水管５ａ内の流速が非常
に小さい場合、流速開閉弁９は閉じられた状態となるこ
とにより、給水管内の水は、バイパス管５ｂ内を流れる
仕組みとなっている。従って例えば、給湯器１からの漏
水及び、配管部での漏水がある場合、給湯管５ａ内に微
少な流れが生ずることになる。給水管５ａ内の微少な流
れは給水管５ａ内に設けられた流速開閉弁９が閉じた状
態となっていることにより、バイパス管５ｂ内に流れ込
むこととなる。バイパス管５ｂ内に微少な流れが生ずる
と、バイパス管５ｂ途中に設けられた加熱装置７で熱せ
られた水が移動することになり、水温検知素子６ａ、６
ｂでは異なる水温を検知することとなる。漏水判定部８
け、水温検知素子６ｍ、６ｂから送られてくる電圧の違
いを検知し、漏水の発生の有無を判定し音又は光等で使
用者に漏水を知らせることができるものである。It is possible to constantly monitor the minute voltages sent from the water leak determination section 811 and the water temperature detection elements 6a and 6b. Further, a flow velocity on-off valve 9 is provided in the water supply pipe 5a immediately after branching from the bypass pipe 5b, and if the flow velocity in the water supply pipe 5a is very small, the flow velocity on-off valve 9 will be in a closed state. Therefore, water in the water supply pipe is configured to flow within the bypass pipe 5b. Therefore, for example, if there is water leakage from the water heater 1 or water leakage from the piping section, a slight flow will occur within the hot water supply pipe 5a. The minute flow in the water supply pipe 5a flows into the bypass pipe 5b because the flow rate on/off valve 9 provided in the water supply pipe 5a is in a closed state. When a slight flow occurs in the bypass pipe 5b, the water heated by the heating device 7 provided in the middle of the bypass pipe 5b moves, causing the water temperature detection elements 6a, 6 to move.
In case b, different water temperatures will be detected. Water leakage determination section 8
By detecting the difference in voltages sent from the water temperature detection elements 6m and 6b, it is possible to determine whether or not a water leak has occurred, and to notify the user of the water leak with sound or light.
又漏水が無い場合は、バイパス管５ｂ内に流れが生じな
いため、バイパス管５ｂの入口側、出口側の水温は均一
に上昇することにより、加熱装置７の入口側、出口側の
加熱装置７の中心部から等距離に設けられた水温検知素
子６ｍ、６ｂは、同一の温度を測定することとなり、水
温検知素子６ａ。In addition, if there is no water leakage, no flow occurs in the bypass pipe 5b, so the water temperature on the inlet side and the outlet side of the bypass pipe 5b rises uniformly, so that the heating device 7 on the inlet side and the outlet side of the heating device 7 rises uniformly. Water temperature sensing elements 6m and 6b provided at equal distances from the center of the water temperature sensing element 6a measure the same temperature.
６ｂからほぼ同一の微少電圧を受は取る漏水判定部８は
、漏水は無いと判定することができるものである。更に
給湯器１給湯口３側に設けられたバルブ４を開くことに
より通常の状態で給湯器１内の湯を使用した場合、バイ
パス管５ｂ内の流れは急となり、バイパス管ｓｂ内の水
は、加熱装置７を通過しても、その温度は変化しないた
め、漏水判定部８は、この場合も漏水無しと判定しうる
ものである。The water leakage determining section 8, which receives and receives almost the same microvoltage from 6b, can determine that there is no water leakage. Furthermore, when the hot water in the water heater 1 is used under normal conditions by opening the valve 4 provided on the hot water supply port 3 side of the water heater 1, the flow in the bypass pipe 5b becomes rapid, and the water in the bypass pipe sb becomes , even if the water passes through the heating device 7, its temperature does not change, so the water leak determination section 8 can determine that there is no water leak in this case as well.
以上のように本実施例によれは、給水管５ａの途中に給
水管５ａから分岐したバイパス管５ｂを形成し、前記バ
イパス管５ｂの途中に、加熱装置７を設け、かつ前記加
熱装置７の入口側と出口側に水温検知素子６ｍ、５ｂを
設けることにより、給湯器自身の漏水、及びバルブのわ
ずかな締め忘れ、配管部からの漏水等の検知が可能とな
り、省エネルギーに寄与するところ大であるとともに、
給湯器及び、配管部のメンテナンスの一部となるもので
ある。As described above, according to this embodiment, a bypass pipe 5b branched from the water supply pipe 5a is formed in the middle of the water supply pipe 5a, a heating device 7 is provided in the middle of the bypass pipe 5b, and the heating device 7 is By installing water temperature detection elements 6m and 5b on the inlet and outlet sides, it is possible to detect water leaks from the water heater itself, slight forgetting to tighten valves, water leaks from piping, etc., which greatly contributes to energy savings. Along with that,
This is part of the maintenance of water heaters and piping.
なお、実施例では、水温検知素子６ｍ、６ｂはバイパス
管５ｂ内の水と直接接触するように設置するとしたが、
水温検知素子６ａ 、６ｂは、バイパス管５ｂ表面に設
けるようにしてもよい。又、加熱装置７にサーモスタッ
トを併設するととで、無駄なエネルギーを使わないよう
にする方法もある。In addition, in the example, the water temperature detection elements 6m and 6b were installed so as to be in direct contact with the water in the bypass pipe 5b.
The water temperature sensing elements 6a and 6b may be provided on the surface of the bypass pipe 5b. Another method is to add a thermostat to the heating device 7 to avoid wasting energy.
発明の効果
以上のように本発明は、給水管の途中に、給水管から分
岐したバイパス管を形成し、前記バイパス管の途中に加
熱装置を設け、かつ前記加熱装置の入口側と出口側に水
温検知素子を設けることにより、給湯器自身の漏水、配
管部での漏水、バルブのわずかな締め忘れ等の検知が可
能となり、省エネルギーに寄与するもの大であるととも
に、給湯器のメンテナンスの一部となるものである。又
、実施例のごとくバイパス管の管径を給水管の管径より
も細くすることで、加熱装置の容量をより小さくするこ
とができるものである。Effects of the Invention As described above, the present invention forms a bypass pipe branched from the water supply pipe in the middle of the water supply pipe, provides a heating device in the middle of the bypass pipe, and provides heating devices on the inlet and outlet sides of the heating device. By installing a water temperature detection element, it is possible to detect water leakage from the water heater itself, water leakage from the piping, slight forgetting to close the valve, etc., which greatly contributes to energy saving and is also part of the maintenance of water heaters. This is the result. Further, by making the diameter of the bypass pipe smaller than the diameter of the water supply pipe as in the embodiment, the capacity of the heating device can be further reduced.
第１図は本発明一実施例の漏水検知装置の概略図、第２
図は従来の漏水検知装置の概略図である。
１ ・・・給湯器、２・・・・・・給水口、３・・・・
・・給湯口、４・・・・・バルブ、５ａ・・・・・・給
水管、５ｂ・・・・・・バイパス管、６ａ、６ｂ・・・
・・・水温検知素子、７・・・・・・加熱装置、８・・
・・・・漏水判定部、９・・・・・・流速開閉弁。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名ｌ
鮪ン零４〉ドダ ８２＾％ｈ＞クリノｔν１１３Ｊ
Ｑ −、、、蛤 ア１く： ノ１
．５７＋ −バ゛イハ゛ス４ト
ｌａ、６ｂ・・、＋′湛）灸支υ奔子
θ デ
第２図Fig. 1 is a schematic diagram of a water leakage detection device according to an embodiment of the present invention;
The figure is a schematic diagram of a conventional water leak detection device. 1...Water heater, 2...Water inlet, 3...
...Hot water inlet, 4...Valve, 5a...Water supply pipe, 5b...Bypass pipe, 6a, 6b...
... Water temperature detection element, 7 ... Heating device, 8 ...
...Water leak determination section, 9...Flow rate on/off valve. Name of agent: Patent attorney Toshio Nakao and 1 other person
Tuna Zero 4〉Doda 82^%h＞Clino tν113J
Q-,, Clam A1: No1. Figure 2
Claims (5)
を形成し、前記バイパス管の途中に、加熱装置を設け、
かつ前記加熱装置の入口側と出口側に水温検知素子を設
けた漏水検知装置。(1) A bypass pipe branched from the water supply pipe is formed in the middle of the water supply pipe, and a heating device is provided in the middle of the bypass pipe,
and a water leak detection device including water temperature detection elements on the inlet side and the outlet side of the heating device.
設けるようにした特許請求の範囲第１項記載の漏水検知
装置。(2) The water leakage detection device according to claim 1, wherein the water temperature detection element is provided in a water supply pipe serving as a first stopping pipe.
特許請求の範囲第１項記載の漏水検知装置。(3) The water leakage detection device according to claim 1, wherein the diameter of the bus pass pipe is smaller than that of the water supply pipe.
閉弁を設けた特許請求の範囲第１項記載の漏水検知装置
。(4) The water leakage detection device according to claim 1, wherein a flow velocity on/off valve is provided in the water supply pipe immediately after branching from the bypass pipe.
囲第１項記載の漏水検知装置。(5) The water leakage detection device according to claim 1, wherein the heating device is provided with a thermostat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1006485A JPS61169734A (en) | 1985-01-23 | 1985-01-23 | Water leakage detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1006485A JPS61169734A (en) | 1985-01-23 | 1985-01-23 | Water leakage detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61169734A true JPS61169734A (en) | 1986-07-31 |
| JPH0554620B2 JPH0554620B2 (en) | 1993-08-13 |
Family
ID=11739946
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1006485A Granted JPS61169734A (en) | 1985-01-23 | 1985-01-23 | Water leakage detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61169734A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103983404A (en) * | 2014-05-22 | 2014-08-13 | 浙江省太阳能产品质量检验中心 | Detecting device of water tank of solar water heater |
| JP2019128077A (en) * | 2018-01-23 | 2019-08-01 | 株式会社ワイ・ジェー・エス． | Hot water storage type water heater |
| CN111307014A (en) * | 2020-03-17 | 2020-06-19 | 何小红 | Valve processing is with subassembly of multi-functional test table that examines |
| CN111307013A (en) * | 2020-03-17 | 2020-06-19 | 何小红 | Multifunctional detection table for valve machining and use method |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7571511B2 (en) | 2002-01-03 | 2009-08-11 | Irobot Corporation | Autonomous floor-cleaning robot |
| US7429843B2 (en) | 2001-06-12 | 2008-09-30 | Irobot Corporation | Method and system for multi-mode coverage for an autonomous robot |
-
1985
- 1985-01-23 JP JP1006485A patent/JPS61169734A/en active Granted
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103983404A (en) * | 2014-05-22 | 2014-08-13 | 浙江省太阳能产品质量检验中心 | Detecting device of water tank of solar water heater |
| JP2019128077A (en) * | 2018-01-23 | 2019-08-01 | 株式会社ワイ・ジェー・エス． | Hot water storage type water heater |
| CN111307014A (en) * | 2020-03-17 | 2020-06-19 | 何小红 | Valve processing is with subassembly of multi-functional test table that examines |
| CN111307013A (en) * | 2020-03-17 | 2020-06-19 | 何小红 | Multifunctional detection table for valve machining and use method |
| CN111307014B (en) * | 2020-03-17 | 2022-01-04 | 浙江东辰阀门科技有限公司 | Valve processing is with subassembly of multi-functional test table that examines |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0554620B2 (en) | 1993-08-13 |
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