JPS61182528A - Pressure-resistant and explosion-proof quantitative filling device - Google Patents

Abstract

PURPOSE:To simplify its constitution and to reduce the cost of the device by storing an electromagnet in a housing storing an electric circuit, driving the electromagnet without exposing the electromagnet to a dangerous place and removing a terminal box and a pressure-resistant and explosion-proof piping place. CONSTITUTION:A load cell 2 and an electronic unit 21 for an indicator are stored in the housing 20, the electromagnet 32 is stored in the inside 33 of the housing 20 and its working shaft 34 is expanded to an external dangerous position 37 through a through-hole 36. A gap 41 having width W1 and depth L1 is formed between the opposite member 24 of the load cell 2 and the end surface 27 of a cylindrical part 26 and a gap 42 having width W2 and depth L2 is formed between the working shaft 34 and the through-hole 36. Since the electromagnet 32 can be driven without exposing it to the dangerous place, a terminal box and a pressure-resistant and explosion-proof piping position can be removed, and because a load can be directly applied to the movable part of the load cell 2 without lossing the pressure resistant and explosion-proof function, the constitution can be simplified.

Description

【発明の詳細な説明】 産業上の利用分野 本発明はＬＰＧ・石油・塗料・有機溶剤などの充填に使
用される耐圧防爆型定量充填装置に関する。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a pressure-resistant, explosion-proof quantitative filling device used for filling LPG, petroleum, paint, organic solvents, and the like.

従来の技術 危険場所で使用されるこの種の定置充填装置は第１０図
に示すように構成さ７している。（旧よ計重台で、耐圧
防爆型ロードセル（２）によって載台（３）が支持さ４
ｔている。（４）は耐圧防爆型指示計で、前記ロードセ
ル（２）の出力電圧をデジタル変換して風袋消去したり
、テンキー（５）からの設定値と比較して定量・定量前
検出する電装ユニットを内蔵しており、設定値が第１の
表示窓（６）に表示され、重量値が第２の表示窓（７）
に表示される。（８）はロードセル（２）と指示計（４
）との間を接続するケーブルで、ロードセル（２）への
励磁電圧の印加ならびにロードセル（２）の出力電圧の
指示計（４）への伝達を実施している。（９）は充填経
路ＱＱを開閉する充填機本体で、載台（３）上に置かれ
た被充填容器αυ中に発火する恐ｎのある充填物を供給
する。（６）は電磁石（社）とこの電磁石αＪで西門さ
れるバルブ（１４）を収容する空気コントローラで、電
磁石０３はケーブルｕｆ９を介して指示計（４）から与
えられる定量信号に応じて励磁され、バルブ１１４）は
定圧空気流路を切換えて充填機本体＜９７のバルブ時を
開閉して充填制御を実行する。BACKGROUND OF THE INVENTION A stationary filling device of this type used in hazardous locations is constructed as shown in FIG. (In the old weighing platform, the loading platform (3) was supported by a pressure-resistant and explosion-proof load cell (2).
I'm here. (4) is a pressure-resistant and explosion-proof indicator, which has an electrical unit that digitally converts the output voltage of the load cell (2) to erase the tare weight, and performs quantitative/pre-quantitative detection by comparing it with the set value from the numeric keypad (5). The set value is displayed in the first display window (6), and the weight value is displayed in the second display window (7).
will be displayed. (8) is the load cell (2) and indicator (4).
) is used to apply excitation voltage to the load cell (2) and to transmit the output voltage of the load cell (2) to the indicator (4). (9) is a filling machine main body that opens and closes the filling path QQ, and supplies a filling material that is likely to catch fire into the filling container αυ placed on the platform (3). (6) is an air controller that accommodates an electromagnet (company) and a valve (14) that is gated by this electromagnet αJ, and the electromagnet 03 is excited in response to a quantitative signal given from the indicator (4) via cable uf9. , valve 114) switches the constant pressure air flow path and opens and closes when the filling machine body <97, thereby executing filling control.

発明か解決しようとする問題点 このように従来の構成ではケーブル（８）　ＱＦｉを介
してロードセル（２）と指示計（４）、指示計（４）と
空気コントローラ四とを接続しているため、ケーブル（
８）叫が危険場所で露出しないように耐圧防爆配管を施
工することが要求さｌしる。また、危険場所に設置され
ているため、ケーブル（３）Ｑ５と各電装部品、商用電
源の接続用に、ロードセル（２）と指示計（４）および
空気コントローラＵに高価な耐圧防爆型端子箱Ｑ７１叫
四が必要である。Problems to be solved by the invention As described above, in the conventional configuration, the load cell (2) and the indicator (4), and the indicator (4) and the air controller 4 are connected via the cable (8) QFi. ,cable(
8) It is required to construct pressure-resistant and explosion-proof piping to prevent the radiation from being exposed in hazardous areas. In addition, since it is installed in a hazardous location, an expensive explosion-proof terminal box is required for the load cell (2), indicator (4), and air controller U to connect the cable (3) Q5, each electrical component, and the commercial power source. Q71 Kyo4 is required.

本発明は端子箱ａ時とケーブルＣ１５１の耐圧防爆配管
とを必要としない構成簡単な耐圧防爆型定量充填装置を
捉供することを目的とする。An object of the present invention is to provide a flameproof explosion-proof quantitative filling device with a simple structure that does not require the terminal box a and the flameproof explosion-proof piping of the cable C151.

問題点を解決するための手段 本発明の耐圧防爆型定量充填装置は、設定重量と計重値
とを電装回路で比較し、定量信号によって充填経路開閉
用の作動流体流路を充填終了側に切換えるよう構成する
と共に、爆発危険雰囲気に設置どさｌし前記電装回路を
収容する筺体内に電磁石を設け、この電磁石の作動軸を
前記筺体を貫通して爆発危険雰囲気に延長しで前記作動
流体流路の開閉用バルブを駆動し、かつ前記作動軸と前
記筺体と前記作動軸の間に耐圧防爆に必要な幅と奥行を
有する間隙を形成したことを特徴とする。Means for Solving the Problems The flameproof explosion-proof quantitative filling device of the present invention compares a set weight with a measured value using an electrical circuit, and uses a quantitative signal to direct the working fluid flow path for opening and closing the filling path to the filling end side. At the same time, an electromagnet is provided in a housing that houses the electrical circuit installed in an explosive atmosphere, and an operating shaft of the electromagnet is extended through the housing into the explosive atmosphere to switch the working fluid. A valve for opening and closing a flow path is driven, and a gap having a width and depth necessary for pressure-proofing and explosion-proofing is formed between the operating shaft, the housing, and the operating shaft.

作用 この構成により、設定重量と計重値とを比較する電装回
路を収容する筺体内に電磁石を収容したため、危険場所
に露出させすとも電磁石を駆動でき、端子箱と耐圧防爆
配管個所を削減できる。また、電磁石を筺体内に収容し
たにもかかわらず、その作動軸を耐圧防爆を満足する１
ｐ８隙を形成して危険場所に延長したため、耐圧防爆構
造を損なうことなく作動流体〔エアーまたは油〕の流路
の開閉用バルブを駆動することができる。Function: With this configuration, the electromagnet is housed in the housing that houses the electrical circuit that compares the set weight and the weighed value, so the electromagnet can be driven even when exposed to a hazardous location, reducing the number of terminal boxes and flameproof piping. . In addition, even though the electromagnet is housed in the housing, its operating axis is a 1.
Since the P8 gap is formed and extended to the hazardous area, the valve for opening and closing the flow path of the working fluid (air or oil) can be driven without damaging the pressure-resistant and explosion-proof structure.

実施例 以下、本発明の実施例を第１図〜第９図に基づいて説明
する。Embodiments Hereinafter, embodiments of the present invention will be explained based on FIGS. 1 to 9.

第１図〜第４因は本発明の第１の実施例を示す。Figures 1 to 4 show a first embodiment of the present invention.

イ夛はロードセル（２）と指示計用電装ユニットぐυを
収容する単一の筺体で、ロードセル（２）の一端囚はボ
ルト（ホ）によって筺体−に取付けられ、他端（Ｂ）は
筺体四の外部に露出している。脅はストレインゲージ、
（至）はロードセル（２）の前記他端（Ｂ）にボルト物
によって取付けらｒした対向部材で、前記筺体四の一部
で前記ロードセル（２）の周囲を取りまく筒状部−の端
面ｔ４ｉｌと幅Ｗ、を隔てて対向しでいる。鱒は対向部
材（至）にボルト（４）止めさ４した計量皿である。輿
は耐圧防煙形の表示窓で、筺体…の内部に配設された表
示器〔図示せず〕を外部から臨めるよう設けら−１てい
る。なお、商用電源は筺体…の端子箱部６υを介して行
わｌ’Ｌ　、端子箱部の１）からのケーブルには従来と
同じように耐圧防爆配管が施工されている。The case is a single housing that houses the load cell (2) and the electrical unit for the indicator.One end of the load cell (2) is attached to the housing with a bolt (E), and the other end (B) is attached to the housing. 4 exposed to the outside. Threat is a strain gauge,
(to) is a facing member attached to the other end (B) of the load cell (2) with a bolt, and is a part of the housing 4 and is an end face t4il of the cylindrical part surrounding the load cell (2). They face each other with a width W between them. The trout is a weighing pan that is bolted (4) to the opposing member (to). The palanquin is a pressure-resistant and smoke-proof display window, and is provided so that a display device (not shown) disposed inside the casing can be viewed from the outside. Note that the commercial power supply is supplied through the terminal box section 6υ of the housing, and the cable from terminal box section 1) is provided with pressure-resistant and explosion-proof piping as in the past.

更に第１図においてに）は電磁石で、第４図にその詳細
を示すように筺体（７）の内部（至）に収容されている
。電磁右部は、消磁状態では作動軸例かばね（至）によ
って押出方向（Ｑに付勢されて実線位置にあり、励磁状
態ではばね（至）の付勢に抗して仮想線位置まで引き込
まｉＬる。なお、作動軸例は筺体（７）の壁面に穿設さ
れた貫通孔（埒を通して筺体四の外部の危険場所σθに
延長さｌしており、作動軸９（２）の出退によつ゛Ｃバ
ルブμｓを開閉駆動している。バルブ端は第１０図のバ
ルブ０勺に相当し、ｗＬ電磁石２）の励磁中は出力ボー
ト−に人力ボート−側の定圧空気が放出され、この出力
ボート鳴の定圧空気によって充填機本体（９）のバルブ
Ｏ→を開放させている。Further, reference numeral 1) in FIG. 1 is an electromagnet, which is housed inside the housing (7) as shown in detail in FIG. In the demagnetized state, the electromagnetic right part is biased in the pushing direction (Q) by the operating shaft and the spring (to), and is at the solid line position, and in the excited state, it resists the bias of the spring (to) and is pulled to the imaginary line position iL In addition, the operating shaft example is a through hole drilled in the wall of the casing (7) and extending to the hazardous area σθ outside the casing 4, so that the operating shaft 9 (2) cannot be moved in or out. The C valve μs is driven to open and close.The valve end corresponds to the valve 0 in Fig. 10, and while the wL electromagnet 2) is energized, the constant pressure air from the human boat side is released to the output boat, and this The constant pressure air from the output boat opens the valve O→ of the filling machine body (9).

ここで対向部材咎と筒状部（４）の端面翰との間に形成
される間隙りυの幅：Ｗ、と奥行Ｌ１、貫通孔（至）と
作動軸−との間に形成される幅：Ｗ２と奥行Ｌ２の間隙
（転）は、筺体四の内部卿で発生しｔコ爆発が筺体（７
）の外部に波及しないよう、爆発等級と筺体（１）の中
間部雰囲気の容積に基づいて、それぞ１１次の基準に照
して設定さｎている。この基準は産業安全研究所技術指
針〔産業安全研究所報告、ＲＩＩＳ−ＴＲ−７９二ｌ　
、昭和５４年１１月１５日、労働省産業安全研究新著〕
であって、間隙曲は上記報告のうちの１１２８１接合画
」に基づいてｗ、、Ｉ、＋か設定されており、間隙（ハ
）はｒ−８２８２回転軸」に基づいてＷ２゜Ｌ２が設定
して防爆さτしている。Here, the width of the gap υ formed between the opposing member and the end face of the cylindrical part (4) is W, and the depth L1 is formed between the through hole (end) and the operating axis. The gap (turn) between width: W2 and depth L2 occurs in the interior of the casing 4, and the explosion occurs in the casing (7).
) are set in accordance with the 11th standard based on the explosion class and the volume of the atmosphere in the middle of the casing (1). This standard is based on the Technical Guidelines of the Institute of Industrial Safety [Report of the Institute of Industrial Safety, RIIS-TR-792l]
, November 15, 1978, Ministry of Labor Industrial Safety Research New Book]
The gap curve is set as w, , I, + based on the 11281 joint image of the above report, and the gap (c) is set as W2°L2 based on the r-8282 rotation axis. It is explosion proof.

このように、ロードセル（２）と電装ユニットシリ、お
よび電装ユニット馨りと電磁石に）を筺体内内で接続し
たため、耐圧防爆配管の個所を少なくできると共に、第
１０図における端子箱αη叫を使用せずとも防爆機能を
損なわない。また、間隙９ｖを設けたことによって耐圧
防爆機能を損わずにロードセル（２）の可動部に直接に
荷重を負荷できるため、筺体（イ）内にロードセル（２
）を収容したことによる感度低下は見らｎない。In this way, since the load cell (2) and the electrical unit (as well as the electrical unit and the electromagnet) are connected inside the housing, the number of flameproof and explosion-proof piping can be reduced, and the terminal box αη in Figure 10 can be used. The explosion-proof function will not be impaired even if it is not done. In addition, by providing a gap of 9V, it is possible to directly apply a load to the movable part of the load cell (2) without impairing its flameproof and explosion-proof function.
) was not observed.

上記第１の実施例では対向部材（至）に計量皿（至）を
直接に取付けたが、これは第５図に示すように計量台部
（ト）の積杆−に連結しても同様であり、この場合、筺
体（７）は縦８■上に既刊けられる。第６図は第５図の
要部を示し、製は連結棒、ｉ力は連結環である。In the first embodiment described above, the weighing pan (to) is directly attached to the opposing member (to), but this can also be done by connecting it to the stack of the weighing platform (to) as shown in Fig. 5. In this case, the case (7) is placed vertically 8cm above. FIG. 6 shows the main parts of FIG. 5, where "M" is a connecting rod and "I" is a connecting ring.

上記第１．第２の実施例では、筺体内の一部である筒状
部（至）の端面（ロ）と前記対向部材−とが間隙（４１
１で対向していたが、これは第７図に示すように筒状部
（１）に穿設された貫通孔−を通してロードセル（２）
の可動部を筺体内の外部に露出させても同様である。こ
の場合にも間隙−は幅と奥行が耐圧防爆を満足するよう
説定さｊしている。Above 1. In the second embodiment, a gap (41
As shown in Fig. 7, the load cell (2) was inserted through the through hole drilled in the cylindrical part (1).
The same thing can be done even if the movable part of is exposed to the outside of the housing. In this case as well, the width and depth of the gap are assumed to satisfy explosion-proof conditions.

第８図は第４の実施例をホす。第７図に示す第３の実施
例ではベンディング型ロードセルの場合であったが、こ
ＪＬは第８図のように圧縮型ロードセルにも適用できる
。この場合には筒状部ｕ弔の外局面ωと対向部材Ｑ５υ
との間に間隙６４を形成して耐圧防爆を満足している。FIG. 8 shows the fourth embodiment. Although the third embodiment shown in FIG. 7 is a case of a bending type load cell, this JL can also be applied to a compression type load cell as shown in FIG. In this case, the outer surface ω of the cylindrical part u and the opposing member Q5υ
A gap 64 is formed between the two to satisfy pressure-proof and explosion-proof conditions.

第１図〜第４図の実施例では、作動軸−の直線運動をそ
のまま筺体内の外部に引き出してバルブ（至）を開閉し
たが、これは第９図に示すように直線運動（Ｌ）を軸閃
まわりの回転運動（Ｅ）に交換して、この回転運動（匂
によってカム板−を介してバルブ（漫を駆動することも
できる。この時の間隙■の幅と奥行も間隙−と同様であ
る。In the embodiments shown in Figs. 1 to 4, the linear motion of the operating shaft (-) is directly drawn out to the outside of the housing to open and close the valve (to), but this is due to the linear motion (L) as shown in Fig. 9. It is also possible to replace the rotational movement (E) with a rotational movement (E) around the shaft flashing, and drive the valve (manual) via the cam plate by this rotational movement. The same is true.

更に、第９図の実施例では直線移動する電磁石（２）の
運動をリンク機構で回転運動に変換して＠ｉＩ鉋を筺体
（７）の外部に延長したが、こｎは直線型の電工：５Ｈ
Ｋ代つア、わ。アロ。よよつア□、軸カー　　　）を 所定角度だけ回動するロータリー型ソレノイドを使用し
、この作動軸を貫通孔（至）を介して筺体（７）の外部
（９）に同様に延長することによって、リンク機構およ
びカム板制を省くことか出来る。Furthermore, in the embodiment shown in Fig. 9, the motion of the linearly moving electromagnet (2) is converted into rotational motion by a link mechanism to extend the @iI plane to the outside of the casing (7), but this is a linear electrician. :5H
Kyotsua, wow. Aro. Using a rotary type solenoid that rotates the shaft by a predetermined angle, this operating shaft is similarly extended to the outside (9) of the housing (7) through the through hole (to). This allows the link mechanism and cam plate system to be omitted.

上記各実施例では筺体（７）にロードセル（２）と電磁
石（２）の両方を収容したが、両者のうち、電磁石（２
）だけを前体（イ）に収容した場合には第１０図におけ
るケーブルα９の耐圧防爆配管ならびに端子箱αη０１
１９　ａｔａを省くことが出来る。In each of the above embodiments, both the load cell (2) and the electromagnet (2) were housed in the housing (7).
) is housed in the front body (A), the explosion-proof piping of cable α9 and the terminal box αη01 in Figure 10
19 ata can be omitted.

発明の詳細 な説明のように本発明の耐圧防爆型定量充填装置は、設
定重量と計量値とを比較する電装回路を収容する筺体内
に電磁石を収容したため、危険場所に露出させすとも電
磁石を駆動でき、端子箱と耐圧防爆配管個所を削減でき
、大幅なコストダウンを達成できる。また、電磁石を筺
体内に収容したにもかかわらず、その作動軸を耐圧防爆
を満足する間隙を形成して危険場所に延長したため、耐
圧防爆構造を損なうことなく作動流体流路の開閉用バル
ブを駆動することができるものである。As described in the detailed description of the invention, the flameproof explosion-proof quantitative filling device of the present invention has an electromagnet housed in a housing that houses an electrical circuit that compares a set weight and a measured value. The terminal box and flameproof piping can be reduced, resulting in significant cost reductions. In addition, even though the electromagnet is housed in the housing, its operating shaft is extended into a hazardous area with a gap that satisfies the flameproof explosion-proof structure, so the valve for opening and closing the working fluid flow path can be operated without compromising the flameproof explosion-proof structure. It is something that can be driven.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本発明の第ｌの実施例の縦断面図、第２図は第
１図のＸ−Ｘ矢視図、弔３図は第１図のＹ−Ｙ矢視図、
第４図は弔１図の要部断面図、第５図は第２の実施例の
一部切欠き正面図、第６図は第５因の要部拡大断面図、
第７図は弔２の実施例の要部断面図、第８図は第８の実
施例の要部断面図、第９図は第４図の他の実施例の斜視
図、第１０図は従来例の説明図である。FIG. 1 is a longitudinal cross-sectional view of the first embodiment of the present invention, FIG. 2 is a view along the X-X arrow in FIG. 1, and Figure 3 is a view along the Y-Y arrow in FIG.
FIG. 4 is a sectional view of the main part of the first diagram, FIG. 5 is a partially cutaway front view of the second embodiment, and FIG. 6 is an enlarged sectional view of the main part of the fifth factor.
Fig. 7 is a sectional view of the main part of the embodiment of the second embodiment, Fig. 8 is a sectional view of the main part of the eighth embodiment, Fig. 9 is a perspective view of another embodiment of Fig. 4, and Fig. 10 is It is an explanatory diagram of a conventional example.

Claims (1)

【特許請求の範囲】[Claims] １、設定重量と計重値とを電装回路で比較し、定量信号
によつて充填経路開閉用の作動流体流路を充填終了側に
切換えるよう構成すると共に、爆発危険雰囲気に設置さ
れ前記電装回路を収容する筺体内に電磁石を設け、この
電磁石の作動軸を前記筺体を貫通して爆発危険雰囲気に
延長して前記作動流体流路の開閉用バルブを駆動し、か
つ前記作動軸と前記筺体と前記作動軸の間に耐圧防爆に
必要な幅と奥行を有する間隙を形成した耐圧防爆型定量
充填装置。1. The electrical circuit is configured to compare the set weight and the weighed value, and switch the working fluid flow path for opening and closing the filling path to the filling end side based on the quantitative signal, and the electrical circuit is installed in an explosive atmosphere. an electromagnet is provided in a housing that houses the electromagnet, an operating shaft of the electromagnet extends through the housing into an explosive atmosphere to drive a valve for opening and closing the working fluid flow path; A pressure-resistant explosion-proof quantitative filling device, wherein a gap having a width and depth necessary for pressure-resistant explosion-proofing is formed between the operating shafts.