JPH048341Y2 - - Google Patents
Info
- Publication number
- JPH048341Y2 JPH048341Y2 JP1985196162U JP19616285U JPH048341Y2 JP H048341 Y2 JPH048341 Y2 JP H048341Y2 JP 1985196162 U JP1985196162 U JP 1985196162U JP 19616285 U JP19616285 U JP 19616285U JP H048341 Y2 JPH048341 Y2 JP H048341Y2
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- valve
- differential pressure
- purge
- pipes
- 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
Links
Landscapes
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Description
【考案の詳細な説明】
〔考案の技術分野〕
本考案は、例えば、原子力発電所の廃液処理装
置や核燃料再処理工場等で使用されるパージ式液
面計の遠隔校正装置に関する。[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a remote calibration device for a purge type liquid level gauge used, for example, in a waste liquid treatment device of a nuclear power plant or a nuclear fuel reprocessing plant.
〔考案の技術的背景とその問題点）
既に提案されているこの種のパージ式液面計の
校正装置は、第２図に示されるように、放射線の
遮蔽体１内に収納された放射性廃液を貯溜する溶
液槽２の溶液液面やその密度を測定すると共に、
液面計の校正を図るように構成されている。[Technical background of the invention and its problems] As shown in FIG. In addition to measuring the solution level and its density in the solution tank 2 that stores
It is configured to calibrate the liquid level gauge.
即ち、第２図において、遮蔽体１内には廃液の
流入管２ａ及び流出管２ｂを備えた溶液槽２が設
置されており、この溶液槽２の溶液３には、各遮
断弁４ａ，４ｂを有する長さを異にした一対のパ
ージ管５ａ，５ｂが上記遮蔽体１及び溶液槽２の
天板を貫通して垂設されている。又、上記両パー
ジ管５ａ，５ｂの一端部には、各加圧タツプ６
ａ，６ｂを有する差圧伝送器６が接続されてお
り、上記両遮断弁４ａ，４ｂの上流側の両パージ
管５ａ，５ｂとの間には、計測管７が接続されて
おり、この計測管７には零調整弁８が、通常運転
時、閉弁された状態にして付設されている。さら
に、上記各加圧タツプ６ａ，６ｂには、シリンダ
ー装置による加圧器９が各リード管１０ａ，１０
ｂを介して接続されており、この加圧器９は、上
記差圧伝送器６のスパン調整をするために、基準
圧力を印加することによつて行なうようになつて
いる。 That is, in FIG. 2, a solution tank 2 equipped with an inflow pipe 2a and an outflow pipe 2b for waste liquid is installed in the shield 1, and the solution 3 in this solution tank 2 is supplied with each cutoff valve 4a, 4b. A pair of purge pipes 5a and 5b having different lengths are provided vertically through the shield 1 and the top plate of the solution tank 2. Further, each pressure tap 6 is attached to one end of both the purge pipes 5a and 5b.
A differential pressure transmitter 6 having valves a and 6b is connected, and a measurement pipe 7 is connected between the two purge pipes 5a and 5b on the upstream side of the two shutoff valves 4a and 4b. A zero adjustment valve 8 is attached to the pipe 7 and is kept closed during normal operation. Furthermore, a pressure device 9 using a cylinder device is installed at each pressure tap 6a, 6b for each lead pipe 10a, 10.
This pressurizer 9 is adapted to apply a reference pressure to adjust the span of the differential pressure transmitter 6.
一方、上記各遮断弁４ａ，４ｂの下流側の両パ
ージ管５ａ，５ｂには、両導圧管１１ａ，１１ｂ
の一端が接続されており、この両導圧管１１ａ，
１１ｂの他端は圧力空気タンク１２に接続されて
いる。又、この両導圧管１１ａ，１１ｂには、各
流量計１３ａ，１４ａを備えた流量調整器１３，
１４及び水を容れた各加湿器１５ａ，１５ｂが設
けられており、この両加湿器１５ａ，１５ｂは、
上記圧力空気タンク１２からの空気を水で加湿
し、この加湿された空気を各導圧管１１ａ，１１
ｂを通して上記両パージ管５ａ，５ｂの先端から
溶液３中へ放出し、これによつて両パージ管５
ａ，５ｂの先端に発生する溶液中の化合物の塩析
出を防止するようになつている。 On the other hand, both purge pipes 5a and 5b on the downstream side of each of the cutoff valves 4a and 4b have both impulse pipes 11a and 11b.
One end of the impulse pipes 11a and 11a are connected to each other.
The other end of 11b is connected to the pressurized air tank 12. Further, both impulse pipes 11a and 11b are equipped with flow rate regulators 13 and 13 equipped with flow meters 13a and 14a, respectively.
14 and each humidifier 15a, 15b containing water is provided, and both humidifiers 15a, 15b are
The air from the pressure air tank 12 is humidified with water, and the humidified air is transferred to each of the impulse pipes 11a and 11.
b into the solution 3 from the tips of both the purge pipes 5a and 5b, and thereby both the purge pipes 5
This is designed to prevent salt precipitation of the compound in the solution that occurs at the tips of a and 5b.
従つて、上述したパージ式液面計の校正装置
は、溶液槽２内の溶液密度を通常測定する場合、
予め、上記圧力タンク１２の圧縮空気を導圧管１
１ａ，１１ｂを通して両流量調整器１３，１４へ
導入し、ここで両流量数を数／ｈ程度に両流量
計１３ａ，１４ａを見ながら調整する。次に、調
整された圧縮空気は、上記両加湿器１５ａ，１５
ｂの下部から水中に吹出されるので、この両加湿
器１５ａ，１５ｂの水で加湿される。しかして、
加湿された空気は、前述したように、両導圧管１
１ａ，１１ｂ及び両パージ管５ａ，５ｂを通つて
溶液槽２の溶液３中に放出されて両パージ管１１
ａ，１１ｂの開口端に溶液中の化合物の塩析出を
防止する。 Therefore, when the above-mentioned calibration device for the purge type liquid level gauge normally measures the solution density in the solution tank 2,
In advance, compressed air from the pressure tank 12 is transferred to the pressure guiding pipe 1.
It is introduced into both flow rate regulators 13 and 14 through 1a and 11b, and here the flow rates are adjusted to about several per hour while checking both flow meters 13a and 14a. Next, the adjusted compressed air is transferred to both the humidifiers 15a and 15.
Since the water is blown into the water from the lower part of the humidifier 15b, it is humidified by the water from both humidifiers 15a and 15b. However,
As mentioned above, the humidified air flows through both impulse pipes 1.
1a, 11b and both purge pipes 5a, 5b into the solution 3 of the solution tank 2, and both purge pipes 11
Prevent salt precipitation of the compound in the solution at the open ends of a and 11b.
他方、通常の液面若しくはその密度の測定状態
では、上記両パージ管５ａ，５ｂの両遮断弁４
ａ，４ｂは、共に開弁しており、計測管７の零調
整弁８は閉弁している。 On the other hand, in normal liquid level or density measurement conditions, both cutoff valves 4 of both purge pipes 5a and 5b are closed.
Both valves a and 4b are open, and the zero adjustment valve 8 of the measurement tube 7 is closed.
従つて、上記差圧伝送器６は、両パージ管５
ａ，５ｂ内の背圧による差圧を測定することにな
る。即ち、この背圧による差圧は、溶液槽２内の
溶液密度に比例するから、これによつて溶液密度
は背圧による差圧で測定することができる。同様
にして、背圧による差圧は溶液の液面を測定でき
る。 Therefore, the differential pressure transmitter 6 has both purge pipes 5
The differential pressure due to the back pressure between a and 5b will be measured. That is, since the pressure difference due to this back pressure is proportional to the solution density in the solution tank 2, the solution density can be measured by the pressure difference due to the back pressure. Similarly, the pressure differential due to back pressure can measure the level of the solution.
次に、上記差圧伝送器６は、定期的にその性能
を確認するための校正を実施している。 Next, the differential pressure transmitter 6 is periodically calibrated to check its performance.
上記差圧伝送器６の校正動作は、予め、両遮断
弁４ａ，４ｂを閉弁すると共に、計測管７の零調
整弁８を開弁して上記差圧伝送器６を零差圧にす
る。ここで、差圧伝送器６の零差圧信号の調整を
行なう。 The calibration operation of the differential pressure transmitter 6 is performed in advance by closing both the shutoff valves 4a and 4b and opening the zero adjustment valve 8 of the measurement pipe 7 to bring the differential pressure transmitter 6 to zero differential pressure. . Here, the zero differential pressure signal of the differential pressure transmitter 6 is adjusted.
次に、上記零調整弁８を閉弁して上記差圧伝送
器６に加圧器９からの基準圧力を両リード管１０
ａ，１０ｂ及び各加圧タツプ６ａ，６ｂを通して
印加し、この差圧伝送器６に基準圧力を加えた状
態で差圧伝送器６のスパン調整し、これによつて
差圧伝送器６の校正を行なつている。 Next, the zero adjustment valve 8 is closed and the reference pressure from the pressurizer 9 is transmitted to the differential pressure transmitter 6 through both lead pipes 10.
a, 10b and each pressurizing tap 6a, 6b, and with reference pressure applied to this differential pressure transmitter 6, the span of the differential pressure transmitter 6 is adjusted, thereby calibrating the differential pressure transmitter 6. is being carried out.
しかしながら、上述したパージ式液面計の校正
装置では、作業者が差圧伝送器６を設置している
現場まで出掛けて行き、上述したように、校正圧
力を印加した後、現場から遠く離れた制御室の指
示計の指示値を比較しなければならず、しかも、
上記加圧器９を現場まで持参しなければならず、
さらに、各差圧伝送器ごとに校正しなければなら
ないので、多くの時間と労力とを費し、運転時間
の短縮や設備利用率（運転効率）を低下させる等
の欠点がある。 However, in the calibration device for the purge type liquid level gauge described above, the operator goes to the site where the differential pressure transmitter 6 is installed, applies the calibration pressure as described above, and then returns to the site far away from the site. The readings on the control room indicators must be compared, and
The above pressurizer 9 must be brought to the site,
Furthermore, since each differential pressure transmitter must be calibrated, it takes a lot of time and effort, and has disadvantages such as shortening operating time and lowering the equipment utilization rate (operating efficiency).
本考案は、上述した事情に鑑みてなされたもの
であつて、差圧伝送器の校正を弁制御器によつて
遠隔操作し、差圧伝送器の校正時間を短縮すると
共に、校正操作を簡素化し、廃液処理設備の運転
効率の向上及び放射線による被曝を防止すること
を目的とするパージ式液面計の遠隔校正装置を提
供する。
The present invention was developed in view of the above-mentioned circumstances.The present invention remotely controls the calibration of the differential pressure transmitter using a valve controller, thereby shortening the calibration time of the differential pressure transmitter and simplifying the calibration operation. The present invention provides a remote calibration device for purge type liquid level gauges, which aims to improve the operating efficiency of waste liquid treatment equipment and prevent exposure to radiation.
本考案は、溶液を容れた溶液槽に一対のパージ
管を垂設し、この両パージ管に各開閉弁及び各絞
り機構を設け、この両絞り機構の各一端部を吸、
排気弁を有するエアタンクに接続し、上記各開閉
弁の上流側の両パージ管との間に計測管を接続
し、この計測管に差圧伝送器を設け、上記各開閉
弁を弁制御器にリード線を介して遠隔制御するよ
うに接続し、上記各開閉弁の下流側の両パージ管
及び溶液タンクとの間に各導圧管を接続し、この
両導圧管に各絞り機構及び上記弁制御器ヘリード
線を介して接続した各開閉弁をそれぞれ付設し、
上記溶液タンクに水供給管及び圧縮空気管を連通
管を通して接続して構成したものである。
In the present invention, a pair of purge pipes are installed vertically in a solution tank containing a solution, each of the purge pipes is provided with each on-off valve and each throttling mechanism, and one end of each of these throttling mechanisms is connected to a suction pipe.
Connect to an air tank having an exhaust valve, connect a measurement pipe between both purge pipes on the upstream side of each of the on-off valves, provide a differential pressure transmitter to this measurement pipe, and connect each of the on-off valves to a valve controller. Connected via lead wires for remote control, each impulse tube is connected between both purge tubes and the solution tank on the downstream side of each on-off valve, and each throttling mechanism and the above valve control are connected to both impulse tubes. Each on-off valve is attached to the device via a lead wire,
A water supply pipe and a compressed air pipe are connected to the solution tank through a communication pipe.
以下、本考案を図示の一実施例について説明す
る。
Hereinafter, the present invention will be described with reference to an illustrated embodiment.
なお、本考案は、上述した具体例と同一構成部
材には、同じ符号を付して説明する。 In addition, the present invention will be described with the same reference numerals attached to the same constituent members as in the above-described specific example.
第１図において、符号１は、コンクリートによ
ると遮蔽体であつて、この遮蔽体１内には、廃液
の流入管２ａ及び流出管２ｂを備えた溶液槽２が
設置されており、この溶液槽２の溶液３には、長
さを異にした一対のパージ管５ａ，５ｂが上記遮
蔽体１及び溶液槽２の天板を貫通して垂設されて
いる。又、この両パージ管５ａ，５ｂには、例え
ば、電磁開閉弁による各開閉弁１６ａ，１６ｂ，
１６ｃ及びキヤピラリチユーブのような各絞り機
構（減圧器）１７ａ，１７ｂが設けられており、
この両絞り機構１７ａ，１７ｂの各一端部には、
給気弁１８ａ及び排気弁１８ｂを備えたエアタン
ク１９が接続されている。さらに、上記各開閉弁
１６ａ，１６ｂの上流側の両パージ管５ａと５ｂ
との間には、計測管２０が接続されており、この
計測管２０には、差圧伝送器２１が設けられてい
る。なお、上記給気弁１８ａとエアタンク１９と
の管路上には、圧力計２２が付設されている。 In FIG. 1, reference numeral 1 is a shield made of concrete, and inside this shield 1 is installed a solution tank 2 equipped with an inflow pipe 2a and an outflow pipe 2b for waste liquid. A pair of purge pipes 5a and 5b having different lengths are vertically installed in the solution 3 of No. 2, passing through the shield 1 and the top plate of the solution tank 2. In addition, the purge pipes 5a, 5b are equipped with on-off valves 16a, 16b, which are electromagnetic on-off valves, for example.
16c and each throttling mechanism (pressure reducer) 17a, 17b such as a capillary tube is provided,
At one end of each of the aperture mechanisms 17a and 17b,
An air tank 19 equipped with an air supply valve 18a and an exhaust valve 18b is connected. Further, both purge pipes 5a and 5b on the upstream side of each on-off valve 16a, 16b are provided.
A measurement tube 20 is connected between the two, and a differential pressure transmitter 21 is provided in the measurement tube 20. It should be noted that a pressure gauge 22 is provided on the pipe between the air supply valve 18a and the air tank 19.
一方、上記各開閉弁１６ａ，１６ｂの下流側の
上記両パージ管５ａ，５ｂには、両導圧管２３
ａ，２３ｂの一端部が接続されており、この両導
圧管２３ａ，２３ｂの他端は、洗浄液（水）を容
れた溶液タンク２４に接続されており、この溶液
タンク２４の下部には各手動弁２５ａ，２６ａを
備えた水供給管２５及び圧縮空気管２６が連通管
２７を通して接続されている。又、上記溶液タン
ク２４の下流側の両導圧管２３ａ，２３ｂには、
例えば、電磁開閉弁による各開閉弁２８ａ，２８
ｂ及びキヤピラリチユーブによる各絞り機構２９
ａ，２９ｂが設けられており、上記各開閉弁１６
ａ，１６ｂ，１６ｃ，２８ａ，２８ｂ、給気弁１
８ａ及び排気弁１８ｂは、現場から遠く離れた制
御室の弁制御器３０に各リード線を介して接続さ
れている。 On the other hand, both impulse pipes 23 are connected to both the purge pipes 5a and 5b on the downstream side of each of the on-off valves 16a and 16b.
One ends of the impulse pipes 23a and 23b are connected to each other, and the other ends of both impulse pipes 23a and 23b are connected to a solution tank 24 containing cleaning liquid (water). A water supply pipe 25 and a compressed air pipe 26 with valves 25a, 26a are connected through a communication pipe 27. Further, both impulse pipes 23a and 23b on the downstream side of the solution tank 24 include
For example, each on-off valve 28a, 28 is an electromagnetic on-off valve.
Each aperture mechanism 29 by b and capillary tube
a, 29b are provided, each of the above-mentioned on-off valves 16
a, 16b, 16c, 28a, 28b, air supply valve 1
8a and exhaust valve 18b are connected via respective lead wires to a valve controller 30 in a control room far away from the site.
以下、本考案の作用について説明する。 The operation of the present invention will be explained below.
通常の溶液密度測定をする場合、上記弁制御器
３０からの信号によつて各開閉弁１６ａ，１６
ｂ，１６ｃ、給気弁１８ａは開弁され、他方、排
気弁１８ｂ及び圧縮空気管２６の手動弁２６ａは
閉弁されており、上記水供給管２５の手動弁１５
ａは開弁されている。しかして、上記溶液タンク
２４内は例えば、水による洗浄液で満されてい
る。又、上記各開閉弁２８ａ，２８ｂは、上記洗
浄液を注水制御するために、断続的に開閉動作を
繰り返す。 When performing normal solution density measurement, each on-off valve 16a, 16 is controlled by a signal from the valve controller 30.
b, 16c, the air supply valve 18a is opened, while the exhaust valve 18b and the manual valve 26a of the compressed air pipe 26 are closed, and the manual valve 15 of the water supply pipe 25 is closed.
Valve a is open. Therefore, the inside of the solution tank 24 is filled with a cleaning liquid made of water, for example. Further, each of the on-off valves 28a and 28b repeats the opening and closing operation intermittently in order to control the injection of the cleaning liquid.
このようにして、上記洗浄液は、上記両導圧管
２３ａ，２３ｂを通して両パージ管５ａ，５ｂの
各先端開口部から点滴するようにして流出して、
この各先端開口部に溶液３中の化合物の塩析出を
防止する。 In this way, the cleaning liquid flows out through the impulse pipes 23a and 23b from the openings at the ends of the purge pipes 5a and 5b in a dripping manner.
Salt precipitation of the compound in the solution 3 is prevented at each tip opening.
次に、パージする空気量の調整は、上記絞り機
構１７ａ，１７ｂによつて行なわれる。即ち、上
記エアータンク１９内には、例えば、約1.4Kg／
cm2程度に保持しておく。一方、上記両パージ管５
ａ，５ｂ内に発生する背圧は、最大2000mmH2Ｏ
程度なので、上記背圧による差圧は、約1.4Kg／
cm2〜1.2Kg／cm2程度の間で変化する。 Next, the amount of air to be purged is adjusted by the throttle mechanisms 17a and 17b. That is, the air tank 19 contains, for example, approximately 1.4 kg/kg.
Keep it at about cm 2 . On the other hand, both the purge pipes 5
The back pressure generated in a and 5b is up to 2000mmH 2 O
Therefore, the differential pressure due to the above back pressure is approximately 1.4Kg/
It varies between about cm 2 and 1.2Kg/cm 2 .
従つて、上記両絞り機構１７ａ，１７ｂは空気
流量を制限して上記両パージ管５ａ，５ｂの先端
開口部から流出する空気量を数／ｈ程度に調整
する。 Therefore, the throttle mechanisms 17a and 17b limit the air flow rate and adjust the amount of air flowing out from the openings at the ends of the purge pipes 5a and 5b to about several hours per hour.
このようにして、通常時において、前記差圧伝
送器２１は、上記両パージ管５ａ，５ｂの背圧に
よる差圧を測定することにより、上記溶液３の密
度を計測する。同様にして、溶液３の液面を測定
することができる。 In this way, under normal conditions, the differential pressure transmitter 21 measures the density of the solution 3 by measuring the differential pressure due to the back pressure between the two purge pipes 5a, 5b. Similarly, the liquid level of solution 3 can be measured.
次に、校正時の作用について説明する。予め、
両開閉弁１６ａ，１６ｂを共に閉弁し、溶液槽２
内で発生する放射性ガスを上記差圧伝送器２１が
わへ逆流するのを遮断すると同時に、手動弁２５
ａを閉弁して水の供給を一時的に停止し、他方の
手動弁２６ａを開弁して圧縮空気を上記連通管２
７、溶液タンク２４、両導圧管２３ａ，２３ｂを
通して両パージ管５ａ，５ｂから放出する。これ
によつて溶液槽２の溶液が両パージ管５ａ，５ｂ
内へ逆流しないようにしている。 Next, the operation during calibration will be explained. In advance,
Both on-off valves 16a and 16b are closed, and the solution tank 2
At the same time, the manual valve 25 is
Close the valve 26a to temporarily stop the water supply, and open the other manual valve 26a to supply compressed air to the communication pipe 2.
7. The solution is discharged from both purge pipes 5a and 5b through the solution tank 24 and both impulse pipes 23a and 23b. As a result, the solution in the solution tank 2 is removed from both purge pipes 5a and 5b.
I try not to let it flow back inside.
又一方、上記溶液タンク２４の上部には、空気
が滞溜するので、上記両絞り機構２９ａ，２９ｂ
は空気で満されている。又、圧力空気供給管２６
の空気圧力とエアタンク１９へ供給する圧縮空気
の空気圧力とを等しくして上記両絞り機構１７
ａ，１７ｂと２９ａ，２９ｂの長さを等しくして
おくことにより、通常測定時と同じ空気量が、校
正時においても、上記両パージ管５ａ，５ｂの先
端より放出される結果となり、溶液が両パージ管
５ａ，５ｂへ逆流することはない。 On the other hand, since air accumulates in the upper part of the solution tank 24, both the throttle mechanisms 29a and 29b
is filled with air. In addition, the pressure air supply pipe 26
The air pressure of the compressed air supplied to the air tank 19 is made equal to the air pressure of the compressed air supplied to the air tank 19.
By making the lengths a, 17b and 29a, 29b equal, the same amount of air as during normal measurement will be released from the tips of both purge pipes 5a, 5b during calibration, and the solution will be There is no possibility of backflow to both purge pipes 5a, 5b.
次に、零差圧の校正は、先ず、供給弁１８ａを
閉弁し、排気弁１８ｂを開弁して、上記エアタン
ク１９内の圧力を200mmH2Ｏ程度まで低下させ
後、これを閉弁する。なお、前記開閉弁１６ｃは
開弁しているので、上記差圧伝送器２１の高圧側
Ｈ入口と低圧側Ｌ入口とは、両絞り機構１７ａ，
１７ｂを通して導通され、零差圧となる。このよ
うにして上記差圧伝送器２１の零調整が行なわれ
る。この場合、この差圧伝送器２１の設置現場ま
で出掛けなくても、遠隔による制御室の弁制御器
３０によつて遠隔制御できるから、校正時間を短
縮できるし、放射能による被曝のおそれはなくな
る。なお、エアタンク１９内の基準圧力は圧力計
２２によつて測定する。 Next, to calibrate the zero differential pressure, first close the supply valve 18a, open the exhaust valve 18b, reduce the pressure inside the air tank 19 to about 200 mmH 2 O, and then close it. . Note that since the on-off valve 16c is open, the high-pressure side H inlet and low-pressure side L inlet of the differential pressure transmitter 21 are connected to both the throttle mechanisms 17a,
Conductive through 17b, resulting in zero differential pressure. In this way, the zero adjustment of the differential pressure transmitter 21 is performed. In this case, the differential pressure transmitter 21 can be remotely controlled by the valve controller 30 in the control room without having to go to the installation site, so the calibration time can be shortened and the risk of exposure to radioactivity is eliminated. . Note that the reference pressure within the air tank 19 is measured by a pressure gauge 22.
次に、上記差圧伝送器２１のスパン調整を行な
う校正は、予め、開閉弁１６ｃを閉弁し、次に、
上記差圧伝送器２１の低圧側Ｌの入口を密閉す
る。さらに、上記供給弁１８ａを開弁し、上記エ
アタンク１９へ圧縮空気を供給してこれに校正圧
力を印加する。なお、校正圧力の目安としては、
上記差圧伝送器２１の測定レンジの約1/2程度の
圧力とする。即ち、例えば、約3000mmH2Ｏが測
定フルレンジの差圧伝送器２１を校正する場合、
こ差圧伝送器２１の高圧側Ｈ入口の圧力を約1700
mmH2Ｏにすれば、上記エアタンク１９の圧力
（200mmH2Ｏ）の差圧として、
1700−200＝1500mmH2Ｏ
が印加される。 Next, in the calibration to adjust the span of the differential pressure transmitter 21, the on-off valve 16c is closed in advance, and then,
The inlet of the low pressure side L of the differential pressure transmitter 21 is sealed. Further, the supply valve 18a is opened, compressed air is supplied to the air tank 19, and a calibration pressure is applied thereto. As a guideline for the calibration pressure,
The pressure is approximately 1/2 of the measurement range of the differential pressure transmitter 21. That is, for example, when calibrating the differential pressure transmitter 21 whose full measurement range is approximately 3000 mmH 2 O,
The pressure at the high pressure side H inlet of the differential pressure transmitter 21 is approximately 1700
If it is set to mmH 2 O, then 1700-200=1500 mmH 2 O will be applied as the differential pressure of the air tank 19 (200 mmH 2 O).
このようにして、差圧伝送器２１の指示が安全
したら、出力指示を読み取り、同時に圧力計２２
で圧力を測定する。 In this way, once the indication of the differential pressure transmitter 21 is safe, read the output indication and at the same time
to measure the pressure.
しかして、上記差圧伝送器２１の指示値1500mm
H2Ｏと上記圧力計２２の測定値の差（測定レン
ジの約1/2のときと、零差圧入力時に差圧伝送器
２１に印加された約200mmH2Ｏとの差）を比較し
て上記差圧伝送器２１のスパン校正が行なわれ
る。 Therefore, the indicated value of the differential pressure transmitter 21 is 1500 mm.
Compare the difference between H 2 O and the measured value of the pressure gauge 22 (the difference between about 1/2 of the measurement range and about 200 mm H 2 O applied to the differential pressure transmitter 21 when zero differential pressure is input). Then, the span calibration of the differential pressure transmitter 21 is performed.
なお、上記校正値の調整手段は、前述した零差
圧入力のときと同じようにして行なわれる。 Note that the adjustment means for the above-mentioned calibration value is performed in the same manner as in the case of zero differential pressure input described above.
このようにして、上記差圧伝送器２１の校正が
終了した後、上記開閉弁１６ａ，１６ｂ，１６ｃ
を開弁し、その後、上記エアタンク１９内の圧力
を通常測定時の圧力まで上昇させる。次に、手動
弁２６ａを閉弁し、他方の手動弁２５ａを開弁す
ることにより、上記溶液タンク２４の空気は上記
両導圧管２３ａ，２３ｂ及び両パージ管５ａ，５
ｂを通して排出されるので、やがて上記両パージ
管５ａ，５ｂ内へ溶液タンク２４から水が供給さ
れる。 In this way, after the calibration of the differential pressure transmitter 21 is completed, the on-off valves 16a, 16b, 16c are
After that, the pressure inside the air tank 19 is increased to the pressure at the time of normal measurement. Next, by closing the manual valve 26a and opening the other manual valve 25a, the air in the solution tank 24 is removed from both the impulse pipes 23a, 23b and the purge pipes 5a, 5.
Since water is discharged through the solution tank 24, water is eventually supplied from the solution tank 24 into both the purge pipes 5a and 5b.
以上述べたように本考案によれば、作業者が(1)
現場に設置してある差圧伝送器２１へ接近して測
定する必要がなくなるので、校正時間を短縮でき
ると共に被曝を低減できるし、(2)校正作業に要す
る人数を低減して１人でも校正することができる
し、さらに、(3)校正時間の短縮に伴い稼動率を向
上することができる。
As described above, according to the present invention, the worker can perform (1)
Since there is no need to approach the differential pressure transmitter 21 installed at the site to measure it, the calibration time can be shortened and radiation exposure can be reduced. Furthermore, (3) the operating rate can be improved by shortening the calibration time.
第１図は、本考案によるパージ式液面計の遠隔
校正装置の系統図、第２図は、既に提案されてい
るパージ式液面計の校正装置の系統図である。
１……遮蔽体、２……溶液槽、５ａ，５ｂ……
パージ管、１６ａ，１６ｂ，１６ｃ……開閉弁、
１７ａ，１７ｂ……絞り機構、１９……エアタン
ク、２０……計測管、２１……差圧伝送器、２３
ａ，２３ｂ……導圧管、２４……溶液タンク、２
８ａ，２８ｂ……開閉弁、２９ａ，２９ｂ……絞
り機構、３０……弁制御器。
FIG. 1 is a system diagram of a remote calibration device for a purge type liquid level gauge according to the present invention, and FIG. 2 is a system diagram of a previously proposed calibration device for a purge type liquid level gauge. 1... Shielding body, 2... Solution tank, 5a, 5b...
Purge pipe, 16a, 16b, 16c...on/off valve,
17a, 17b... Throttle mechanism, 19... Air tank, 20... Measurement tube, 21... Differential pressure transmitter, 23
a, 23b... Impulse tube, 24... Solution tank, 2
8a, 28b...Opening/closing valve, 29a, 29b... Throttle mechanism, 30... Valve controller.
Claims (1)
し、この両パージ管に各開閉弁及び各絞り機構を
設け、この両絞り機構の各一端部を吸、排気弁を
有するエアタンクに接続し、上記各開閉弁の上流
側の両パージ管との間に計測管を接続し、この計
測管に差圧伝送器を設け、上記各開閉弁を弁制御
器にリード線を介して遠隔制御するように接続
し、上記各開閉弁の下流側の両パージ管及び溶液
タンクとの間に各導圧管を接続し、この両導圧管
に各絞り機構及び上記弁制御器ヘリード線を介し
て接続した各開閉弁をそれぞれ付設し、上記溶液
タンクに水供給管及び圧縮空気管を連通管を通し
て接続したことを特徴とするパージ式液面計の遠
隔校正装置。 A pair of purge pipes is installed vertically in a solution tank containing a solution, each of the purge pipes is provided with an on-off valve and each throttle mechanism, and one end of each of the throttle mechanisms is connected to an air tank having intake and exhaust valves. , a measurement pipe is connected between both purge pipes on the upstream side of each of the above-mentioned on-off valves, a differential pressure transmitter is provided in this measurement pipe, and each of the above-mentioned on-off valves is remotely controlled via a lead wire to a valve controller. Each pressure pipe was connected between both purge pipes and the solution tank on the downstream side of each of the on-off valves, and each pressure pipe was connected to each throttling mechanism and the valve controller through a lead wire. A remote calibration device for a purge type liquid level gauge, characterized in that each opening/closing valve is attached, and a water supply pipe and a compressed air pipe are connected to the solution tank through a communication pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985196162U JPH048341Y2 (en) | 1985-12-20 | 1985-12-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985196162U JPH048341Y2 (en) | 1985-12-20 | 1985-12-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62104121U JPS62104121U (en) | 1987-07-02 |
| JPH048341Y2 true JPH048341Y2 (en) | 1992-03-03 |
Family
ID=31154728
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985196162U Expired JPH048341Y2 (en) | 1985-12-20 | 1985-12-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH048341Y2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55109827U (en) * | 1979-01-30 | 1980-08-01 |
-
1985
- 1985-12-20 JP JP1985196162U patent/JPH048341Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62104121U (en) | 1987-07-02 |
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