JPS5868567A - Torque limiting switch for motor-driven valve - Google Patents
Torque limiting switch for motor-driven valveInfo
- Publication number
- JPS5868567A JPS5868567A JP16820381A JP16820381A JPS5868567A JP S5868567 A JPS5868567 A JP S5868567A JP 16820381 A JP16820381 A JP 16820381A JP 16820381 A JP16820381 A JP 16820381A JP S5868567 A JPS5868567 A JP S5868567A
- Authority
- JP
- Japan
- Prior art keywords
- drive shaft
- limit switch
- valve
- arm
- fixed
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
- F16K31/046—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor with electric means, e.g. electric switches, to control the motor or to control a clutch between the valve and the motor
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electrically Driven Valve-Operating Means (AREA)
Abstract
Description
【発明の詳細な説明】
弁開閉用モータと弁の間に介在する、大きな減速比を有
するウオーム減速機構を利用して、トルクの変化を検知
し、リミットスイッチを作動させ、弁を開閉する策動弁
は、たとえば、弁が閉じてリミットスイッチが開いても
、弁体の僅かな座り直しがあると、その動きが、リミッ
トスイッチの接点部においては大きく拡大されて、再び
リミットスイッチが閉じることがある。[Detailed description of the invention] A strategy that uses a worm reduction mechanism with a large reduction ratio that is interposed between the valve opening/closing motor and the valve to detect changes in torque, operate a limit switch, and open/close the valve. For example, even if the valve is closed and the limit switch is opened, if the valve body recoils slightly, that movement will be greatly amplified at the limit switch's contact point, making it impossible for the limit switch to close again. be.
このチャタリング現象は、最近の発電プラントや化学プ
ラントのように、プラント全体をコンピュータ制御する
場合には、プラントの運転が停止する等の大きな混乱を
まねくことになる。When the entire plant is controlled by a computer, such as in recent power plants and chemical plants, this chattering phenomenon causes major confusion, such as stopping the plant operation.
この問題ヲ屏決する手段として、たとえば、弁の全閉直
前に作動する位[IJミツトスイッチを併用する方法、
あるいは作動腕の動作位置から戻りを使用する方法等が
ある。As a means of solving this problem, for example, a method of using an IJ mitswitch in combination with a valve that operates just before the valve is fully closed,
Alternatively, there is a method in which the operating arm returns from the operating position.
しかし、前者は、位置リミットスイッチの調節が微妙で
、誤差が大きく、後者は、接点の電流容量が小さく、温
度・湿度・使用雰囲気等の耐環境性が悪く、かつ交直両
軍源に共用できないという欠点がある。However, the former has delicate adjustment of the position limit switch and has a large error, and the latter has a small contact current capacity, poor environmental resistance against temperature, humidity, and operating atmosphere, and cannot be used for both AC and DC sources. There is a drawback.
本発明は、電流容量の大きいロータリ一式リミットスイ
ッチを、強力なトルクの変化により作動するスナップア
クション機構により駆動することにより、上述の欠点を
解消した′4動弁用トルクリミットスイッチ装置に関す
るもので、以下添付の図面に基いて具体的に説明する。The present invention relates to a torque limit switch device for a '4 valve train that eliminates the above-mentioned drawbacks by driving a rotary complete limit switch with a large current capacity with a snap action mechanism activated by a strong torque change. A detailed explanation will be given below based on the attached drawings.
第1図において、(局はロータリ一式リミットスイッチ
、(均はスナップアクション機構、(1)は基板で、リ
ミットスイッチ囚の端子板(2)は、基板(1)の後面
(第1固在面)上部に後向固着され、同じく回転ドラム
(8)は、基板(1)の中央を回転自在に貫通する駆動
軸(4)に枢設され、駆動軸(4)の前端には、図示を
省略したトルク検出機構に連係するピニオン(5)が嵌
着されている。In Figure 1, (station is a rotary complete limit switch, (uniform is a snap action mechanism, (1) is a board, and the terminal plate (2) of the limit switch is the rear surface (first fixed surface) of the board (1). ) The rotating drum (8) is fixed to the upper part rearwardly and is also pivoted to a drive shaft (4) that rotatably passes through the center of the substrate (1). A pinion (5) linked to the omitted torque detection mechanism is fitted.
(6)は接点で、図示を省略した弁開閉用モータに接続
されている。(6) is a contact, which is connected to a valve opening/closing motor (not shown).
第3図と第6図に示すように、端子板(2)の後面に固
着された第1取付板(7)の後面中央には、後方を向く
第1軸筒(8)の前端のフランジ(8a)が固着され、
第1軸筒(8)の後部には、第1係止埋(9)が嵌着さ
れ、第1係止珈(9)の下面には、第1ストツパ(9a
)が垂設されている。As shown in Figures 3 and 6, in the center of the rear surface of the first mounting plate (7) fixed to the rear surface of the terminal plate (2), there is a flange at the front end of the first shaft cylinder (8) facing rearward. (8a) is fixed,
A first locking pad (9) is fitted to the rear part of the first shaft cylinder (8), and a first stopper (9a) is fitted to the lower surface of the first locking hole (9).
) are installed vertically.
第1軸筒(8)における7ランジ(8a)と第1係止環
(9)の間には、下方を向く第1揺動腕α0)が枢設さ
れ、第1揺動腕l1O)の下端には、前後力向を向き下
面開口する係合@ 11が連設されている。A first swinging arm α0) facing downward is pivotally installed between the seventh flange (8a) and the first locking ring (9) in the first shaft cylinder (8), and the first swinging arm l1O) At the lower end, an engagement @ 11 facing the front-rear force direction and opening at the bottom is connected.
フランジ(8a)と第1係止環(9)と第1揺動腕(1
0)の上部には、欠円筒状に屈曲し、両端が第1ストツ
バ(c+a)を挾む第1板ばね(12)が外嵌されてい
る。The flange (8a), the first locking ring (9), and the first swing arm (1
A first leaf spring (12), which is bent into a hollow cylindrical shape and whose both ends sandwich the first stop collar (c+a), is fitted onto the upper part of the spring 0).
従って、第1揺動腕住0)は、第1板はね(12)の付
勢により、常時は下方を向いている。Therefore, the first swing arm 0) always faces downward due to the bias of the first plate spring (12).
第1取付板(7)の後面両端には、下方を向く左右1対
の係止腕11B)(1’alが枢設され、各係止腕口8
)の対向面下端には、上方より階段状に並ぶ段部(13
a)(13b)(13c)が連設されている。At both ends of the rear surface of the first mounting plate (7), a pair of left and right locking arms 11B) (1'al) facing downward are pivotally installed, and each locking arm opening 8
) is provided with a stepped section (13
a) (13b) (13c) are arranged in succession.
両係止腕08I Q’l)の上部間には、引張ばねC1
4)が張設され、同じく中央には、互に対向する調節ボ
ルト(ロ)(ホ)が螺設され、かつ各係止腕(13)は
、ばね(14)により、調節ボルト@)の先端が、前記
係合溝(11)の側面に向う方向に付勢されている。A tension spring C1 is installed between the upper parts of both locking arms 08IQ'l).
4) is tensioned, and adjustment bolts (B) and (E) are screwed in the center and are opposed to each other, and each locking arm (13) is fixed to the adjustment bolt @) by a spring (14). The tip is biased toward the side surface of the engagement groove (11).
前記駆動軸(4)の後部には、下方を向く固定腕(16
)が固設され、同じく後端には、欠円板状の調節板(1
7)が枢設され、調節板醇)には、同心をなす左右1対
の弧状孔(至)(9))が切設されている。At the rear of the drive shaft (4), there is a fixed arm (16) facing downward.
) is fixedly installed, and also at the rear end is a disc-shaped adjustment plate (1
7) is pivotally installed, and a pair of concentric arc-shaped holes (9) on the left and right are cut in the adjustment plate (2).
調節板(2)の前面下端には、若干の間隔を設けて対向
する前向突片α9)α鋳が突設され、両突片面09)に
対向するように螺設したねじ(20)(財)の先端間に
は、上記固定腕<16)の下端が挾持されている。At the lower front end of the adjustment plate (2), a forward protruding piece α9) α cast facing each other with a slight interval is protruded, and a screw (20) ( The lower end of the fixed arm <16) is held between the ends of the fixed arm <16).
駆動軸(4)における固定腕06)と調節板へ7)の間
C(は、左右1対の調節腕(zl(21)が枢設され、
上記各弧状孔μs)へ後方より遊挿したビス(ロ)は、
各調節腕(zl)の後面に螺締されている。Between the fixed arm 06) on the drive shaft (4) and the adjustment plate 7), a pair of left and right adjustment arms (zl (21)) are pivotally installed,
The screws (b) loosely inserted from the rear into each of the above arc-shaped holes μs) are
It is screwed onto the rear surface of each adjustment arm (zl).
従って、各調節腕咥)は、駆動軸(4)まわりに適宜揺
動させた後、調節板(+7)に固定することができる。Therefore, each adjustment arm can be properly swung around the drive shaft (4) and then fixed to the adjustment plate (+7).
各調節腕(21)の前面における駆動軸(4)より上記
保合溝t11)までと等距離の個所には、前端が保合溝
CI℃の後部側方に達する駆動ビン(転))が、前向き
突設されている。At a position equidistant from the drive shaft (4) to the above-mentioned retaining groove t11) on the front surface of each adjustment arm (21), there is a drive pin (roll) whose front end reaches the rear side of the retaining groove CI°C. , protruding forward.
ロータリーリミットスイッチ(Nの回転ドラム(3)の
後面には、第2取付板(財)が固着され、第2取付板(
財)の後面には、駆動軸(4)に枢嵌した第2軸筒幽)
の前端のフランジ(25a)が固着されている。A second mounting plate is fixed to the rear surface of the rotating drum (3) of the rotary limit switch (N).
On the rear surface of the vehicle, there is a second shaft shaft (4) that is pivotally fitted to the drive shaft (4).
The flange (25a) at the front end of is fixed.
第2軸筒嘆)の後部には、第2係止埋(財))が嵌着し
、第2係止環(財))の上面前部には、第2ストツパ(
26a)が立設され、同じく左右両側面後部には、保合
片(26b)(26b)が横向突設されている。A second locking pad is fitted into the rear of the second shaft cylinder, and a second stopper is fitted onto the front of the upper surface of the second locking ring.
26a) are erected, and retaining pieces (26b) are laterally protruded from the rear portions of both left and right sides.
第2軸筒嘆)におけるフランジ(ZSa)と第2係止環
例の間には、上方を向く第2揺動腕婢)が枢設され、第
2揺動腕僻)の上端は、上記保合溝(11)の前部に係
合している。Between the flange (ZSa) of the second shaft cylinder and the second locking ring, a second swinging arm facing upward is pivotally mounted, and the upper end of the second swinging arm is connected to the above-mentioned It engages with the front part of the retaining groove (11).
7ランジ(25a)と第2係止環@)と第2揺動腕僻)
の下部には、欠円筒状に屈曲し、両端が第2ストツパ(
26a)ヲ挾む第2板はねμs)が外嵌している。7 lange (25a), second locking ring @), and second swing arm)
The lower part is bent into a cylindrical shape, and both ends have second stoppers (
26a) A second plate (μs) is fitted on the outside.
従って、第2揺動腕僻)は、妬2板ばね嘔の付勢により
、常時は上方を向いて、上記第1揺動腕(10)と上下
に一直線をなして係合し、第2係止環@)の両保合片(
26b)(26b)は、上記両係止腕(IB)03)の
段部(iab)(13b)に係合している。Therefore, the second swinging arm (10) is always directed upward and engaged with the first swinging arm (10) vertically in a straight line due to the bias of the second leaf spring. Both retaining pieces (
26b) (26b) is engaged with the stepped portion (iab) (13b) of both of the locking arms (IB) 03).
第3図は、弁開閉用モータが回転中における上述装置を
示すもので、左右面駆動ピン□I l&31 u 、係
合溝01)の両側方に離間している。FIG. 3 shows the above-mentioned device while the valve opening/closing motor is rotating, and the left and right side drive pins □I l & 31 u are spaced apart on both sides of the engagement groove 01).
いま、本装置が、第3図に示す状態にあって、閉じつつ
ある弁が全閉になると、トルク検出機構に連係するビニ
オン(5)には、たとえば第3図時計方向に急激に大き
なトルクがかかる。Now, when this device is in the state shown in Figure 3 and the valve that is closing becomes fully closed, the pinion (5) linked to the torque detection mechanism will receive a sudden large torque, for example in the clockwise direction as shown in Figure 3. It takes.
すると、駆動軸(4)に枢嵌している回転ドラム(3)
と第2取付板(財)と第2軸筒(ロ))と第2係止環劉
は、一体的に結合し、かつ第2係止環(支))の両保合
片(26b)(26b)が両係止腕00B)の段部(1
3b)(13b)に係合しているので、不動であるが、
駆動軸(4)に固着する固定腕α6)は、時計方向に揺
動する。Then, the rotating drum (3) which is pivotally fitted on the drive shaft (4)
and the second mounting plate (goods), the second shaft cylinder (b)), and the second locking ring are integrally connected, and both retaining pieces (26b) of the second locking ring (support) (26b) is the stepped portion (1) of both locking arms 00B).
3b) It is immovable because it is engaged with (13b), but
A fixed arm α6) fixed to the drive shaft (4) swings clockwise.
従って、固定腕α6)に結合する調節板(17)と両調
節腕(211ml+が、駆動軸(4)とともに時計方向
に回動し、第7図に示すように、同図左方の駆動ビン(
転))が保合溝(11)の左面に当接し、ついで右方に
押圧して、第1・第2板ばね(12)14)に抗して、
第1・第2揺動腕(10)(271を右方に揺動させる
。Therefore, the adjustment plate (17) and both adjustment arms (211ml+) connected to the fixed arm α6) rotate clockwise together with the drive shaft (4), and as shown in FIG. (
(roller)) comes into contact with the left side of the retaining groove (11), then presses it to the right against the first and second leaf springs (12) 14),
Swing the first and second swing arms (10) (271) to the right.
そして、鵠1揺動腕叫の係止溝Q′fJの右面が、調節
ポル)(15)e介して、右方の係止腕gs3 f 、
第1板ばね(増に抗[7て右方に揺動させる。Then, the right side of the locking groove Q'fJ of the Mouse 1 swinging arm is connected to the right locking arm gs3f,
The first leaf spring (increasingly resists [7] and swings to the right.
その結果、第8図に示すように、右方の係止腕(13)
の段部(13b)が、第2係止埋■の右方の保合片(2
6b)より離脱するので、第2ストツパ(zsa)i介
して、第2板はねμs)の時計方向の付勢を受けている
第2係止iH)が時計方向に回動し、左右の係止片(2
6b)(z6b)が、それぞれ左方の係止腕08)の段
部(13a)と右方の係止腕(13)の段部(13C)
に係合する。As a result, as shown in Figure 8, the right locking arm (13)
The stepped portion (13b) is connected to the right retaining piece (2) of the second locking pad
6b), the second lock iH), which is biased clockwise by the second plate μs) via the second stopper (zsa)i, rotates clockwise, and the left and right Locking piece (2
6b) (z6b) is the step (13a) of the left locking arm 08) and the step (13C) of the right locking arm (13), respectively.
engage with.
従って、第2係止環(財))と一体に結合する回転ドラ
ム(3)も共に回転して、リミットスイッチ(Alの接
点(6)が切替わり、弁開閉用モータが停止するととも
に、モータの結線が、弁を開く方向に切替わる。Therefore, the rotating drum (3) that is integrally connected to the second locking ring rotates together, the limit switch (Al contact point (6)) is switched, the valve opening/closing motor is stopped, and the motor is The connection is switched to open the valve.
全閉となった弁を開くには、押ボタン(図示せず)操作
によりモータに通電すれば、本装置は、逆転するモータ
と第1板はね(12)の付勢により、上述と逆に動作し
、第7図に示す状態となって、リミットスイッチ(A)
の接点(6)によりモータに通電され、ついで第3図に
示す状態に戻る。To open the fully closed valve, energize the motor by operating a push button (not shown), and this device will reverse the above-mentioned action by the reversing motor and the bias of the first plate spring (12). The limit switch (A)
The motor is energized by the contact (6), and then returns to the state shown in FIG.
さらに、モータが回転して弁が全開になると、ピニオン
(5)と駆動軸(4)を介して伝達された大きなトルク
により、第3図右方の駆動ビン(23)が係合溝01)
の右面を押圧して、第2係止環@6)が反時計方向に回
動し、左右の係止片(26b)(26b)が、それぞれ
左方の係止腕(PI)の段部(taC)と右方の係止腕
α8ンの段部(13a)に係合し、モータが停止すると
ともに、モータの結線を弁を閉じる方向に切替える。Furthermore, when the motor rotates and the valve is fully opened, the large torque transmitted through the pinion (5) and drive shaft (4) causes the drive pin (23) on the right side of Figure 3 to move into the engagement groove 01.
The second locking ring @6) rotates counterclockwise by pressing the right side of the locking ring @6), and the left and right locking pieces (26b) (26b) engage the stepped portion of the left locking arm (PI), respectively. (taC) engages with the stepped portion (13a) of the right locking arm α8, the motor stops, and the motor connection is switched in the direction of closing the valve.
上述のように、動作する本装置においては、たとえば、
本装置が第8図に示す状態となって、弁が全閉して停止
したモータを再び回転させるには、係合溝(ロ)より遠
く離間している右方の駆動ピン盆が、係合溝α℃の右面
を押圧するまで、駆動軸(4)ヲ回転させる必要があり
、この回転量に比し、弁体の座り直し等の僅かな動きに
よる駆動軸(4)の回転は著しく小さく、かつ動駆動ビ
ン俤)幽)の位置は、上述のように適宜調節しうるので
、弁の開閉により、リミットスイッチ(4)にチャタリ
ング現象の起る恐れはない。As mentioned above, in this device that operates, for example,
When this device is in the state shown in Figure 8, in order to restart the motor that has stopped due to the valve being fully closed, the right drive pin tray that is far away from the engagement groove (b) must be It is necessary to rotate the drive shaft (4) until it presses the right side of the joint groove α℃, and compared to this amount of rotation, the rotation of the drive shaft (4) due to slight movements such as reseating the valve body is remarkable. Since it is small and the position of the dynamically driven bottle can be adjusted appropriately as described above, there is no possibility of chattering occurring in the limit switch (4) due to opening and closing of the valve.
従って、本装置を装備した電動弁は、特にコンピュータ
ー制御をするプラント等に使用して甚だ効果的である。Therefore, an electric valve equipped with this device is extremely effective especially when used in a computer-controlled plant.
第1図は、本発明装置の一実施例を示す側面図、第2図
は、同じく後面図、
第3図は、第1図の■−■線断面図、
第4図は、第1図のIV−IV線断面図、第5図は、第
4図のV−V線矢視図、
第6図は、第2図の■−■線断面図、
第7図は、弁全開直前における本装置の第3図に相当す
る図、
第8図は、弁全閉時における本装置の第3図に相当する
図である。
丙ロータリ一式リミットスイッチ
(均スナップアクション機構
(1)基板 (2)端子板(6)ビニオン
(6)接点
(7)第1取付板 (8)第1軸筒(8a)7ラ
ンジ (9)第1係止埋(9a)第1ストツパ
αQ第1揺動腕C11)係合溝 (1匂第
1板ばね(18)係止腕 (13a)(13
b)(13c)段部(制御引張ばね (ロ))
調節−ポルトQe)固定腕 (17)調節板
(18)弧状孔 α9)突片(20)ねじ
(21)調節腕盤)ビス
μs)駆動ピン−第2取付板 幽)第2軸筒FIG. 1 is a side view showing one embodiment of the device of the present invention, FIG. 2 is a rear view, FIG. 3 is a sectional view taken along the line ■-■ in FIG. 1, and FIG. 5 is a sectional view taken along the line V-V in FIG. 4, FIG. 6 is a sectional view taken along the ■-■ line in FIG. 2, and FIG. A diagram corresponding to FIG. 3 of this device, and FIG. 8 are diagrams corresponding to FIG. 3 of this device when the valve is fully closed. C rotary complete limit switch (uniform snap action mechanism (1) board (2) terminal plate (6) pinion (6) contact (7) first mounting plate (8) first shaft cylinder (8a) 7 langes (9) first 1 locking pad (9a) 1st stopper
αQ first swing arm C11) engagement groove (1) first leaf spring (18) locking arm (13a) (13
b) (13c) Stepped part (control tension spring (b))
Adjustment - Porto Qe) Fixed arm (17) Adjustment plate (18) Arc hole α9) Projection piece (20) Screw
(21) Adjustable arm plate) screw
μs) Drive pin - 2nd mounting plate Yu) 2nd shaft cylinder
Claims (1)
出して、リミットスイッチを作動させることにより弁を
開閉する電動弁において、駆動軸の一端をトルク検出機
構に連係した、弁開閉用モータを制動するロータリ一式
すミットス°イツテと、 前記駆動軸と平行をなし、かつ前記リミットスイッチの
不動部材に固着された第1軸筒と、第1軸筒に基端が枢
着され、ばねをもって駆動軸の方向を向くように付勢さ
れた第1揺動腕と、第1揺動腕の遊端に連設され、前記
駆動軸と対向する面が開口し、かつ駆動軸と平行をなす
係合溝と、 前記リミットスイッチの不動部材における第1軸筒の両
側方に、基端が枢着され、左右対称かつ第1揺動腕とほ
ぼ平行をなし、かつ対向面における前記駆動軸の両側方
に、階段状に並ぶ複数の段部を備え、中央部に、互に対
向する調節ポル)1螺入するとともに、引張ばねを張設
して、各調節ボルトを、上記係合溝の側面にh接するよ
うに付勢した1対の係止腕と、 前記駆動軸の他端に適宜固着された、駆動軸と直交する
調節板と、 駆動軸の他端部に基端が枢着され、かつ遊端を駆動軸ま
わりに揺動させうるように、調節板に固定され、駆動軸
と平行をなして、上記係合溝の側方に位置する駆動ビン
を備える左右1対の調節腕と、 前記駆動軸に枢嵌されるとともに、リミットスイッチの
回転ドラムに固着された第2軸筒と、第2軸筒に嵌着さ
れ、はぼ直径方向両端部に、放射方向を向いて、先端が
上記両係止腕における駆動軸の軸線に対して対称位置に
ある段部のいずれか1個ずつと係合する保合片を備える
第2係止環と、 第2軸筒に基端が枢着されるとともに、遊端が前記保合
溝に係合シフ、ばねにより上記係合片と直角方向を向く
ように付勢された第2揺動腕とを備えてなる電動弁用ト
ルクリミットスイッチ装置。[Claims] In an electric valve that opens and closes the valve by detecting a sudden change in torque when the valve is fully open and when the valve is fully closed and operating a limit switch, one end of the drive shaft is connected to a torque detection mechanism. a rotary set that brakes a valve opening/closing motor, which is connected to the limit switch; a first shaft cylinder parallel to the drive shaft and fixed to the immovable member of the limit switch; a first swinging arm whose end is pivoted and urged by a spring to face the drive shaft; and a first swinging arm connected to the free end of the first swinging arm, the surface facing the drive shaft being open , and an engagement groove parallel to the drive shaft; the base end is pivotally attached to both sides of the first shaft cylinder of the fixed member of the limit switch, and the base end is symmetrical and substantially parallel to the first swing arm; In addition, a plurality of stepped portions are provided on both sides of the drive shaft on the opposing surfaces, and one adjustment pole (1) facing each other is screwed into the center portion, and a tension spring is tensioned to adjust each adjustment. a pair of locking arms that urge the bolt to come into contact with the side surface of the engagement groove; an adjustment plate that is properly fixed to the other end of the drive shaft and perpendicular to the drive shaft; and the other end of the drive shaft. a drive whose base end is pivotally connected to the end, and which is fixed to the adjustment plate so that the free end can swing around the drive shaft, parallel to the drive shaft, and located on the side of the engagement groove; A pair of left and right adjusting arms each having a bottle; a second shaft cylinder pivotally fitted to the drive shaft and fixed to the rotating drum of the limit switch; a second locking ring, the second locking ring having a locking piece facing in the radial direction, the tip of which engages one of the stepped portions of each of the locking arms located symmetrically with respect to the axis of the drive shaft; and a second swinging arm whose base end is pivotally connected to the second shaft cylinder, whose free end engages the retaining groove, and is biased by a spring so as to face in a direction perpendicular to the engaging piece. A torque limit switch device for an electric valve, comprising:
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16820381A JPS5868567A (en) | 1981-10-21 | 1981-10-21 | Torque limiting switch for motor-driven valve |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16820381A JPS5868567A (en) | 1981-10-21 | 1981-10-21 | Torque limiting switch for motor-driven valve |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5868567A true JPS5868567A (en) | 1983-04-23 |
JPS642829B2 JPS642829B2 (en) | 1989-01-18 |
Family
ID=15863694
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16820381A Granted JPS5868567A (en) | 1981-10-21 | 1981-10-21 | Torque limiting switch for motor-driven valve |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5868567A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6064373U (en) * | 1983-10-11 | 1985-05-07 | 西部電機工業株式会社 | Torque switch locking mechanism |
-
1981
- 1981-10-21 JP JP16820381A patent/JPS5868567A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6064373U (en) * | 1983-10-11 | 1985-05-07 | 西部電機工業株式会社 | Torque switch locking mechanism |
Also Published As
Publication number | Publication date |
---|---|
JPS642829B2 (en) | 1989-01-18 |
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