JPH07110254A - Instrument for measuring top level of granular body layer - Google Patents
Instrument for measuring top level of granular body layerInfo
- Publication number
- JPH07110254A JPH07110254A JP27757193A JP27757193A JPH07110254A JP H07110254 A JPH07110254 A JP H07110254A JP 27757193 A JP27757193 A JP 27757193A JP 27757193 A JP27757193 A JP 27757193A JP H07110254 A JPH07110254 A JP H07110254A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- differential pressure
- air pressure
- granular material
- comparator
- 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.)
- Withdrawn
Links
Landscapes
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は粉粒体層の頂面レベル測
定装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a top surface level measuring device for a granular material layer.
【０００２】[0002]
【従来の技術】固気系流動層を利用した反応装置、例え
ば石炭ガス化炉の流動層高さやレベル検知に適用される
粉粒体層の頂面レベル測定装置としては、図２(A) 系統
図に示すようなものが知られている。すなわち、上記装
置は粉粒体層０１が収められた粉粒体槽０２において、
粉粒体層頂面０３の上下の槽壁にそれぞれ開口された上
部空気流入口０３ａ，下部空気流入口０３ｂに先端が接
続された上部空気圧支管０４，下部空気圧支管０５と、
その先端部寄りにそれぞれ挿入された上部圧力検出器０
６，下部圧力検出器０７と、上部空気圧支管０４，下部
空気圧支管０５に接続する空気圧主管０８と、上部圧力
検出器０６，下部圧力検出器０７にそれぞれ接続された
差圧計算器０９と、これに接続された比較器０１０と、
差圧計算器０９，比較器０１０から形成された演算器０
１１等から構成されている。なお、上部圧力検出器０
６，下部圧力検出器０７はそれぞれ絶対圧力を検出する
ので、空気圧が流れている状態でも圧力測定が可能な構
造となっている。2. Description of the Related Art A reactor using a solid gas type fluidized bed, for example, a top surface level measuring apparatus for a granular material layer applied to the fluidized bed height and level detection of a coal gasification furnace is shown in FIG. The one shown in the system diagram is known. That is, the above apparatus is provided in the granular material tank 02 containing the granular material layer 01,
An upper air pressure branch pipe 04 and a lower air pressure branch pipe 05, the tips of which are connected to an upper air inflow port 03a and a lower air inflow port 03b, which are respectively opened in upper and lower tank walls of the top surface 03 of the granular material layer,
Upper pressure detector 0 inserted near the tip
6, a lower pressure detector 07, an upper air pressure main pipe 08, a pneumatic main pipe 08 connected to the lower pneumatic pressure support pipe 05, an upper pressure detector 06, a differential pressure calculator 09 respectively connected to the lower pressure detector 07, and A comparator 010 connected to
An arithmetic unit 0 formed from a differential pressure calculator 09 and a comparator 010
It is composed of 11 and the like. The upper pressure detector 0
The lower pressure detector 07 and the lower pressure detector 07 each detect an absolute pressure, so that the pressure can be measured even when air pressure is flowing.
【０００３】このような装置において、上部空気圧支管
０４，下部空気圧支管０５から粉粒体層頂面０３の近傍
の粉粒体を吹き飛ばしてしまわない程度の強さの空気圧
を粉粒体槽０２内に連続的に供給し、そのときの上部圧
力検出器０６の検出値と下部圧力検出器０７の検出値と
の差圧Δｐを差圧計算器０９で算出し、その結果を比較
器０１０で、図２(B) 線図に示すように、差圧曲線０１
２を差圧しきい値０１３と比較することにより粉粒体層
頂面０３のレベルが判断される。In such an apparatus, the air pressure of the upper and lower air pressure support pipes 04, 05 in the powder and granular material tank 02 is not strong enough to blow off the powder and granular materials in the vicinity of the top surface 03 of the powder and granular material layer. Continuously, the differential pressure Δp between the detected value of the upper pressure detector 06 and the detected value of the lower pressure detector 07 at that time is calculated by the differential pressure calculator 09, and the result is calculated by the comparator 010. As shown in Fig. 2 (B) diagram, differential pressure curve 01
By comparing 2 with the differential pressure threshold value 013, the level of the powder particle layer top surface 03 is determined.
【０００４】しかしながら、このような手段では、下記
のような欠点がある。 (1) 空気を連続して粉粒体層０１の内部へ供給するの
で、そこでの空気流入量が多くなってしまい、したがっ
て粉粒体層０１の内部で燃焼等の反応が起こる惧れのあ
る材料には本手段を適用できない。 (2) 図２(B) に示すように、差圧曲線０１２が初期に差
圧しきい値０１３を越えたのち、差圧Δｐが下がり、粉
粒体層０１内部へ空気が浸透するまで時間がかかるの
で、装置の応答が遅くなってしまう。ちなみに、このよ
うな手段では、差圧曲線０１２が安定状態になるまでに
１時間もかかっている。However, such means have the following drawbacks. (1) Since air is continuously supplied to the inside of the granular material layer 01, the inflow amount of air there becomes large, and therefore there is a possibility that a reaction such as combustion occurs inside the granular material layer 01. This means cannot be applied to materials. (2) As shown in FIG. 2 (B), after the differential pressure curve 012 initially exceeds the differential pressure threshold 013, the differential pressure Δp decreases, and it takes time for the air to permeate into the granular material layer 01. As a result, the response of the device becomes slow. By the way, with such means, it takes as long as one hour for the differential pressure curve 012 to reach a stable state.
【０００５】[0005]
【発明が解決しようとする課題】本発明は、このような
事情に鑑みて提案されたもので、層内への空気流入量が
少なく、かつ応答が速く、また流入空気量が多いと燃焼
する惧れ等のある粉粒体にも適用可能な安全性，汎用性
及び測定能率に優れた粉粒体層の頂面レベル測定装置を
提供することを目的とする。SUMMARY OF THE INVENTION The present invention has been proposed in view of the above circumstances, and it burns when the amount of inflow of air into the formation is small, the response is fast, and the amount of inflowing air is large. It is an object of the present invention to provide a top surface level measuring device for a granular material layer, which is applicable to even granular materials with a risk of damage, has excellent safety, versatility, and measurement efficiency.
【０００６】[0006]
【課題を解決するための手段】そのために、本発明は空
気圧主管から分岐し同一の粉粒体槽の計画粉粒体層頂面
の所定上方，下方レベルの槽壁にそれぞれ開口する上部
空気圧支管，下部空気圧支管と、上記上部空気圧支管，
上記下部空気圧支管にそれぞれ挿入された上部圧力検出
器，下部圧力検出器に接続された差圧計算器と、上記差
圧計算器の経時出力とあらかじめ設定された上記両圧力
検出器の差圧しきい値とを比較して上記計画粉粒体層頂
面のレベルを表示することができる比較器とを有する粉
粒体層の頂面レベル測定装置において、上記空気圧主管
に挿入され、上記比較器に順次接続されたタイマ，流量
制御器により制御される弁装置を具え、上記粉粒体槽の
内部に間欠的に空気圧を供給しながら得られた安定した
差圧と上記差圧しきい値とを比較することを特徴とす
る。To this end, the present invention is directed to an upper pneumatic branch pipe which is branched from a pneumatic main pipe and opens in the tank walls at predetermined upper and lower levels above the top surface of the planned granular material layer of the same granular material tank. ， Lower pneumatic branch pipe and above upper pneumatic branch pipe ，
An upper pressure detector inserted into the lower pneumatic tributary pipe, a differential pressure calculator connected to the lower pressure detector, the time-dependent output of the differential pressure calculator and a preset differential pressure threshold of both pressure detectors. In a particle level top surface level measuring device having a comparator capable of displaying the level of the planned particle layer top surface by comparing the value with the value, the pneumatic main tube is inserted into the comparator. Comparing a stable differential pressure obtained while intermittently supplying air pressure to the inside of the granular material tank and the differential pressure threshold value, with a timer device and a valve device controlled by a flow rate controller connected in sequence. It is characterized by doing.
【０００７】[0007]
【作用】このような構成によれば、空気圧主管から分岐
し同一の粉粒体槽の計画粉粒体層頂面の所定上方，下方
レベルの槽壁にそれぞれ開口する上部空気圧支管，下部
空気圧支管と、上記上部空気圧支管，上記下部空気圧支
管にそれぞれ挿入された上部圧力検出器，下部圧力検出
器に接続された差圧計算器と、上記差圧計算器の経時出
力とあらかじめ設定された上記両圧力検出器の差圧しき
い値とを比較して上記計画粉粒体層頂面のレベルを表示
することができる比較器とを有する粉粒体層の頂面レベ
ル測定装置において、上記空気圧主管に挿入され、上記
比較器に順次接続されたタイマ，流量制御器により制御
される弁装置を具え、上記粉粒体槽の内部に間欠的に空
気圧を供給しながら得られた安定した差圧と上記差圧し
きい値とを比較するので、下記の作用が行われる。 (1) 粉粒体層の内部へ空気を連続して供給する必要がな
くなったので、上記粉粒体槽への空気流入量が少なく、
その内部の粉粒体との燃焼反応等が起こりにくくなる。 (2) 安定した差圧の検出時間が従来の１時間程度から５
分間程度で済むようになったので、測定作業時間が短縮
される。With this structure, the upper pneumatic support pipe and the lower pneumatic support pipe branching from the pneumatic main pipe and opening in the tank walls at predetermined upper and lower levels above the top surface of the planned granular material layer of the same granular material tank, respectively. And a differential pressure calculator connected to the upper air pressure branch pipe and the lower air pressure branch pipe, respectively, and a differential pressure calculator connected to the lower pressure pressure detector, and the time-dependent output of the differential pressure calculator and the two preset values. In a powder level top surface level measuring device having a comparator capable of displaying the level of the planned powder layer top surface by comparing with a differential pressure threshold of a pressure detector, in the pneumatic main pipe A stable differential pressure and a stable differential pressure obtained while intermittently supplying air pressure to the inside of the powder and granular material tank, comprising a timer device inserted and sequentially connected to the comparator and controlled by a flow rate controller. Compare with differential pressure threshold Since, the action of the following is performed. (1) Since it is no longer necessary to continuously supply air to the inside of the granular material layer, the amount of air flowing into the granular material tank is small,
Combustion reaction with the powder and granules therein becomes difficult to occur. (2) Stable differential pressure detection time is 5 hours from the conventional 1 hour
Since it only takes about a minute, the measurement work time is shortened.
【０００８】[0008]
【実施例】本発明を図２(A) に示した粉粒体層の頂面レ
ベル測定装置に適用した一実施例を図面について説明す
ると、図２と同一の符号はそれぞれ同図と同一の部材を
示し、まず、図１(A) 系統図において、１は差圧計算器
０９，比較器２，タイマ３，流量制御器４等から形成さ
れる演算器、５は上部空気流入口０３ａ，下部空気流入
口０３ｂに目詰まり防止用掃気流及び圧力測定用空気流
を間欠的に供給するため、空気圧主管０８に挿入された
電磁弁で、これはタイマ３及び流量制御器４により制御
される。６は比較器２からの出力表示である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to the top surface level measuring apparatus for a powder / granular material layer shown in FIG. 2A will be described with reference to the drawings. The same reference numerals as those in FIG. First, in the system diagram of FIG. 1 (A), 1 is a differential pressure calculator 09, a comparator 2, a timer 3, a flow rate controller 4, etc., and an arithmetic unit 5 is an upper air inlet 03a, A solenoid valve inserted in the pneumatic main pipe 08 for intermittently supplying the clogging prevention scavenging air and the pressure measuring air flow to the lower air inlet 03b, which is controlled by the timer 3 and the flow rate controller 4. . Reference numeral 6 is an output display from the comparator 2.
【０００９】次に、図１(B) 線図において、７は差圧曲
線である。Next, in the diagram of FIG. 1B, 7 is a differential pressure curve.
【００１０】このような装置において、粉粒体槽０２の
粉粒体層頂面０３のレベルを測定するには、演算器１の
内部で上部圧力検出器０６，下部圧力検出器０７からそ
れぞれ入力した圧力値を基に差圧計算器０９で差圧Δｐ
を求め、これを比較器２であらかじめ設定した差圧しき
い値０１３と比較する。このとき、比較器２はタイマ３
によって空気流が１５秒程度の間隔で流れているときの
差圧Δｐだけをサンプルし、図１(B) に示すように、一
定時間経過しても差圧しきい値０１３よりも差圧Δｐが
大きいとき、粉粒体層頂面０３のレベルが測定範囲にあ
ると判定し、出力表示６を出力する。また、演算器１で
は上部圧力検出器０６，下部圧力検出器０７から入力し
た圧力値から上部空気流入口０３ａ，下部空気流入口０
３ｂの掃気流量の設定や、タイマ３に基づく圧力測定用
空気の供給等の流量制御を同時に行っている。In such an apparatus, in order to measure the level of the powder particle layer top surface 03 of the powder particle tank 02, it is input from the upper pressure detector 06 and the lower pressure detector 07 inside the arithmetic unit 1, respectively. The differential pressure Δp is calculated by the differential pressure calculator 09 based on the pressure value
Is calculated, and this is compared with the differential pressure threshold value 013 set in advance by the comparator 2. At this time, the comparator 2 uses the timer 3
By sampling only the differential pressure Δp when the airflow is flowing at intervals of about 15 seconds, the differential pressure Δp is lower than the differential pressure threshold 013 even after a certain period of time, as shown in FIG. 1 (B). When it is larger, it is determined that the level of the powder particle layer top surface 03 is within the measurement range, and the output display 6 is output. Further, in the computing unit 1, the upper air inlet 03a and the lower air inlet 0a are calculated from the pressure values input from the upper pressure detector 06 and the lower pressure detector 07.
Flow rate control such as setting of the scavenging flow rate of 3b and supply of pressure measurement air based on the timer 3 is simultaneously performed.
【００１１】なお、本装置で粉粒体層０１内へ空気を流
すためには、そこの圧力よりも高い圧力空気を圧縮機に
より供給する。また、下部空気流入口０３ｂには通常こ
れが粉粒体層０１で詰まらないように一定流量の空気圧
を流しているが、万一、下部空気流入口０３ｂが詰まっ
た場合は、下部空気圧支管０５での空気圧は空気圧主管
０８から送り込む空気圧と同一圧力になり、これが空気
圧が一番高い状態である。そして、これに対し、上部空
気圧支管０４は下部空気圧支管０５から送り込まれる空
気圧よりも低いので、上部空気圧支管０４と下部空気圧
支管０５との圧力差が検出できる。In order to flow the air into the granular material layer 01 in this apparatus, compressed air higher than the pressure there is supplied by the compressor. In addition, the lower air inlet 03b is normally supplied with a constant flow rate of air pressure so as not to be clogged with the granular layer 01, but if the lower air inlet 03b is blocked, the lower air pressure branch pipe 05 is used. The air pressure is the same as the air pressure sent from the main air pressure pipe 08, which is the highest air pressure. On the other hand, since the upper air pressure support pipe 04 has a lower pressure than the air pressure sent from the lower air pressure support pipe 05, the pressure difference between the upper air pressure support pipe 04 and the lower air pressure support pipe 05 can be detected.
【００１２】このような、実施例の装置によれば、空気
圧主管から分岐し同一の粉粒体槽の計画粉粒体層頂面の
所定上方，下方レベルの槽壁にそれぞれ開口する上部空
気圧支管，下部空気圧支管と、上記上部空気圧支管，上
記下部空気圧支管にそれぞれ挿入された上部圧力検出
器，下部圧力検出器に接続された差圧計算器と、上記差
圧計算器の経時出力とあらかじめ設定された上記両圧力
検出器の差圧しきい値とを比較して上記計画粉粒体層頂
面のレベルを表示することができる比較器とを有する粉
粒体層の頂面レベル測定装置において、上記空気圧主管
に挿入され、上記比較器に順次接続されたタイマ，流量
制御器により制御される弁装置を具え、上記粉粒体槽の
内部に間欠的に空気圧を供給しながら得られた安定した
差圧と上記差圧しきい値とを比較するので、下記効果が
奏せられる。 (1) 粉粒体層の内部へ空気を連続して供給する必要がな
くなったので、上記粉粒体槽への空気流入量が少なく、
その内部の粉粒体との燃焼反応等が起こりにくくなり、
したがって本装置では各種粉粒体への適用の汎用性が向
上する。 (2) 安定した差圧の検出時間が従来の１時間程度から５
分間程度で済むようになったので、測定作業時間が短縮
され、したがって測定能率が向上する。 (3) 本発明は固気系流動層を利用した反応装置、例えば
石炭ガス化炉の流動層高さやレベル検知にも広く適用す
ることができる。According to the apparatus of the embodiment as described above, the upper pneumatic tributary pipe is branched from the pneumatic main pipe and opens on the tank walls at predetermined upper and lower levels above the top surface of the planned granular material layer of the same granular material tank. , Lower air pressure branch pipe, upper air pressure branch pipe, upper pressure detector inserted in the lower air pressure branch pipe respectively, differential pressure calculator connected to the lower pressure pressure detector, temporal output of the differential pressure calculator and preset In the top surface level measuring device of the granular material layer having a comparator capable of displaying the level of the planned granular material layer top surface by comparing the differential pressure thresholds of the both pressure detectors, It has a valve device inserted into the pneumatic main pipe and connected to the comparator in sequence and controlled by a flow rate controller. Differential pressure and above differential pressure threshold Since compared with the value, the following effects are obtained if. (1) Since it is no longer necessary to continuously supply air to the inside of the granular material layer, the amount of air flowing into the granular material tank is small,
Combustion reaction etc. with the powder and granules inside will not occur easily,
Therefore, in this device, the versatility of application to various powders and granules is improved. (2) Stable differential pressure detection time is 5 hours from the conventional 1 hour
Since it takes only about a minute, the measurement work time is shortened and therefore the measurement efficiency is improved. (3) The present invention can be widely applied to a reactor using a solid-gas fluidized bed, for example, fluidized bed height and level detection in a coal gasification furnace.
【００１３】[0013]
【発明の効果】要するに本発明によれば、空気圧主管か
ら分岐し同一の粉粒体槽の計画粉粒体層頂面の所定上
方，下方レベルの槽壁にそれぞれ開口する上部空気圧支
管，下部空気圧支管と、上記上部空気圧支管，上記下部
空気圧支管にそれぞれ挿入された上部圧力検出器，下部
圧力検出器に接続された差圧計算器と、上記差圧計算器
の経時出力とあらかじめ設定された上記両圧力検出器の
差圧しきい値とを比較して上記計画粉粒体層頂面のレベ
ルを表示することができる比較器とを有する粉粒体層の
頂面レベル測定装置において、上記空気圧主管に挿入さ
れ、上記比較器に順次接続されたタイマ，流量制御器に
より制御される弁装置を具え、上記粉粒体槽の内部に間
欠的に空気圧を供給しながら得られた安定した差圧と上
記差圧しきい値とを比較することにより、層内への空気
流入量が少なく、かつ応答が速く、また流入空気量が多
いと燃焼する惧れ等のある粉粒体にも適用可能な安全
性，汎用性及び測定能率に優れた粉粒体層の頂面レベル
測定装置を得るから、本発明は産業上極めて有益なもの
である。In summary, according to the present invention, the upper air pressure branch pipe and the lower air pressure branch off from the pneumatic main pipe and open on the tank walls at the predetermined upper and lower levels above the top surface of the planned granular material layer of the same granular material tank, respectively. The branch pipe, the upper air pressure branch pipe, the upper pressure detector inserted into the lower air pressure branch pipe, the differential pressure calculator connected to the lower pressure detector, and the time-dependent output of the differential pressure calculator and the preset value In the powder / particle layer top surface level measuring device having a comparator capable of comparing the differential pressure thresholds of both pressure detectors and displaying the level of the planned powder / particle layer top surface, the pneumatic main pipe And a valve device controlled by a flow rate controller, which is sequentially connected to the comparator, and has a stable differential pressure obtained while intermittently supplying air pressure to the inside of the granular material tank. With the differential pressure threshold By comparison, the amount of air inflow into the bed is small and the response is fast, and it can be applied to granular materials that may burn if there is a large amount of inflow air. Safety, versatility and measurement efficiency The present invention is extremely useful industrially, since a device for measuring the level of the top surface of a granular material layer which is excellent in quality is obtained.
【図１】本発明を図２(A) に示す粉粒体層の頂面レベル
測定装置に適用した一実施例を示し、(A) ，(B) はそれ
ぞれ系統図，経過時間と差圧との関係線図である。FIG. 1 shows an embodiment in which the present invention is applied to the top surface level measuring device for a powder / granular material layer shown in FIG. 2 (A), where (A) and (B) are a system diagram, elapsed time and differential pressure, respectively. FIG.
【図２】公知の粉粒体層の頂面レベル測定装置を示し、
(A) ，(B) はそれぞれ系統図，経過時間と差圧との関係
線図である。FIG. 2 shows a known top surface level measuring device for a granular material layer,
(A) and (B) are a system diagram and a diagram showing the relationship between elapsed time and differential pressure, respectively.
１ 演算器 ２ 比較器 ３ タイマ ４ 流量制御器 ５ 電磁弁 ６ 出力表示 ７ 差圧曲線 ０１ 粉粒体層 ０２ 粉粒体槽 ０３ 粉粒体層頂面 ０３ａ 上部空気流入口 ０３ｂ 下部空気流入口 ０４ 上部空気圧支管 ０５ 下部空気圧支管 ０６ 上部圧力検出器 ０７ 下部圧力検出器 ０８ 空気圧主管 ０９ 差圧計算器 ０１３ しきい値 1 calculator 2 comparator 3 timer 4 flow controller 5 solenoid valve 6 output display 7 differential pressure curve 01 powder / grain layer 02 powder / grain tank 03 powder / grain layer top surface 03a upper air inlet 03b lower air inlet 04 Upper air pressure branch pipe 05 Lower air pressure branch pipe 06 Upper pressure detector 07 Lower pressure detector 08 Air pressure main pipe 09 Differential pressure calculator 013 Threshold
───────────────────────────────────────────────────── フロントページの続き (72)発明者 石賀 則由 長崎市飽の浦町１番１号 三菱重工業株式 会社長崎造船所内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Noriyuki Ishiga 1-1 1-1 Atsunoura-machi, Nagasaki City Mitsubishi Heavy Industries Ltd. Nagasaki Shipyard Co., Ltd.
Claims (1)
計画粉粒体層頂面の所定上方，下方レベルの槽壁にそれ
ぞれ開口する上部空気圧支管，下部空気圧支管と、上記
上部空気圧支管，上記下部空気圧支管にそれぞれ挿入さ
れた上部圧力検出器，下部圧力検出器に接続された差圧
計算器と、上記差圧計算器の経時出力とあらかじめ設定
された上記両圧力検出器の差圧しきい値とを比較して上
記計画粉粒体層頂面のレベルを表示することができる比
較器とを有する粉粒体層の頂面レベル測定装置におい
て、上記空気圧主管に挿入され、上記比較器に順次接続
されたタイマ，流量制御器により制御される弁装置を具
え、上記粉粒体槽の内部に間欠的に空気圧を供給しなが
ら得られた安定した差圧と上記差圧しきい値とを比較す
ることを特徴とする粉粒体層の頂面レベル測定装置。1. An upper air pressure branch pipe, a lower air pressure branch pipe branching from a pneumatic main pipe and opening in a tank wall at a predetermined upper and lower levels above a plan surface of a granular material layer of the same powder grain tank, and the above upper air pressure branch pipe. , The upper pressure detector inserted in the lower pneumatic tributary pipe, the differential pressure calculator connected to the lower pressure detector, the time-dependent output of the differential pressure calculator and the preset differential pressure between the two pressure detectors. In a particle level top level measuring device having a comparator capable of displaying the level of the above-mentioned planned particle level by comparing with a threshold value, the comparator is inserted into the pneumatic main pipe, and the comparator And a valve device controlled by a flow rate controller, which are sequentially connected to each other, and a stable differential pressure obtained while intermittently supplying air pressure to the inside of the granular material tank and the differential pressure threshold value. Powder characterized by comparison Top level measuring device for granular layers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27757193A JPH07110254A (en) | 1993-10-08 | 1993-10-08 | Instrument for measuring top level of granular body layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27757193A JPH07110254A (en) | 1993-10-08 | 1993-10-08 | Instrument for measuring top level of granular body layer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07110254A true JPH07110254A (en) | 1995-04-25 |
Family
ID=17585350
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27757193A Withdrawn JPH07110254A (en) | 1993-10-08 | 1993-10-08 | Instrument for measuring top level of granular body layer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07110254A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1014048A2 (en) * | 1998-12-17 | 2000-06-28 | Samsung Electronics Co. Ltd. | Apparatus for indicating level of liquid in tank |
-
1993
- 1993-10-08 JP JP27757193A patent/JPH07110254A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1014048A2 (en) * | 1998-12-17 | 2000-06-28 | Samsung Electronics Co. Ltd. | Apparatus for indicating level of liquid in tank |
| EP1014048A3 (en) * | 1998-12-17 | 2001-09-05 | Samsung Electronics Co. Ltd. | Apparatus for indicating level of liquid in tank |
| US6452202B1 (en) | 1998-12-17 | 2002-09-17 | Samsung Electronics Co., Ltd. | Apparatus for measuring level of liquid in tank |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20001226 |