CN103256420B - Valve positioner and electric gate valve and mortor operated valve - Google Patents

Valve positioner and electric gate valve and mortor operated valve Download PDF

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Publication number
CN103256420B
CN103256420B CN201310039806.7A CN201310039806A CN103256420B CN 103256420 B CN103256420 B CN 103256420B CN 201310039806 A CN201310039806 A CN 201310039806A CN 103256420 B CN103256420 B CN 103256420B
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China
Prior art keywords
movable
transfer unit
transmission parts
power transfer
torque transmission
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CN103256420A (en
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北岛主计
岩井和则
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Seibu Electric and Machinery Co Ltd
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Seibu Electric and Machinery Co Ltd
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Priority to JP2012-033110 priority Critical
Priority to JP2012033110A priority patent/JP5912636B2/en
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Abstract

A kind of valve positioner and electric gate valve and mortor operated valve, wherein, valve positioner (10) comprises: motor (11); The driving force of motor is passed to the power transfer unit (12) of external mechanical; In motor action process, the torque limiter (13) motor being stopped when power transfer unit produces the load necessarily; And by power transfer unit, external mechanical is applied to the manual handle (14) of power, have: the movable body rotated integrally with manual handle; Be connected to the torque transmission parts of power transfer unit; And make the frictional force generation part producing frictional force between movable body and torque transmission parts, when exceeding the frictional force between movable body and torque transmission parts by manual handle to the torque that movable body applies, the integrality of torque transmission parts and power transfer unit and movable body is removed.Thus, when producing the above load of regulation, by the lever operated transmission limiting power to external mechanical.

Description

Valve positioner and electric gate valve and mortor operated valve
Technical field
The present invention relates to a kind of valve positioner by motor driving external mechanical and electric gate valve and the mortor operated valve with this valve positioner.
Background technique
The transmission of power of motor is driven external mechanical to external mechanical by power transfer unit by the valve positioner being connected to external mechanical.Valve positioner is provided with following mechanism: when power transfer unit for some reason etc. produces the above load of regulation, make not the mechanism that externally machine applies the state of power, the mechanism that the power being applied to external mechanical is limited.The damage produced in valve positioner, external mechanical for preventing the above load of regulation from carrying out acting on.
In such mechanism, the parts of the rotating force being provided with the blocking-up motor when the producing certain above load externally transmission of machine, its concrete example is documented in patent documentation 1,2.
Following technology is recorded: when the torque that generation regulation in valve positioner is above, block the transmission of the rotating force of motor, motor continues action but the rotating force of motor does not pass to external mechanical in patent documentation 1,2.
But, in the valve positioner of patent documentation 1,2, valve positioner cannot be gone out from the state-detection of motor and produce abnormal situation.
On the other hand, in patent documentation 3, record the motor driver being connected with torque calculator on motor.If this motor driver is applicable to valve positioner, then the structure just making motor stop when producing and specifying above torque can be set.
At the scene of remote operation valve positioner, because sample plot have employed the structure long-rangely can knowing the operating state of motor, thus operator can to learn that valve positioner has from the operating state of motor without exception.
But, even if the state of being failure to actuate at motor, because the external mechanical being connected valve positioner still can action, therefore, the handle that can manually carry out operating can be set on valve positioner.
Be connected to the handle of power transfer unit by arranging, because motor is motor, even if cannot to this motor supply electric power time, motor produce undesirable condition and motor cannot action time external mechanical also can action, effectively tackle emergency.
Patent documentation 1: Japanese Unexamined Patent Publication 2004-261093 publication
Patent documentation 2: Japanese Unexamined Patent Publication 2010-223419 publication
Patent documentation 3: Japanese Unexamined Patent Publication 2009-81935 publication
The problem that invention solves
But the prerequisite of handle is operated handle by people, when the operation of handle is only limited to urgent originally.Therefore, following conception can not be had: in valve positioner, the structure of the transmission of the power of stopping or restriction handle when the torque above by lever operated generation regulation is set.
Therefore, such as, when the torque that the generation regulation due to the lever operated of multiple people's handle with sleeves etc. is above, the transmission of the power to external mechanical cannot be stopped.
Summary of the invention
The present invention does in view of the foregoing, its object is to provide a kind of when due to lever operated and produce regulation above load time subtend external mechanical the transmission of power carry out the valve positioner that limits and the electric gate valve using this valve positioner and mortor operated valve.
Solve the means of problem
According to a kind of valve positioner involved by described object the 1st invention, comprise: motor, the driving force of described motor is passed to the power transfer unit of the switching mechanism of described valve, in described motor action process, the torque limiter this motor being stopped when described power transfer unit produces the load necessarily, and by described power transfer unit, the switching mechanism of described valve being applied to the manual handle of power, this valve positioner has the movable body rotated integratedly with described manual handle, be connected to the torque transmission parts of described power transfer unit, and between described movable body and described torque transmission parts, produce the frictional force generation part of the frictional force in the sense of rotation of described movable body, time below the described frictional force of the torque applied to described movable body by described manual handle between this movable body and described torque transmission parts, these torque transmission parts and described power transfer unit and this movable body become and carry out action integratedly, when to be exceeded the described frictional force between this movable body and this torque transmission parts to the torque that this movable body applies by this manual handle, the integrality of these torque transmission parts and this power transfer unit and this movable body is removed.
According to a kind of valve positioner involved by described object the 2nd invention, comprise: motor, the driving force of described motor is passed to the power transfer unit of the switching mechanism of described valve, in described motor action process, the torque limiter this motor being stopped when described power transfer unit produces the load necessarily, and by described power transfer unit, the switching mechanism of described valve is applied to the manual handle of power, this valve positioner has movable body, described manual handle and described movable body can switch between coupled condition and notconnect state, under described coupled condition, described movable body and described manual handle rotate integratedly, be connected to the torque transmission parts of described power transfer unit, and between described movable body and described torque transmission parts, produce the frictional force generation part of the frictional force in the sense of rotation of described movable body, time below the described frictional force of the torque applied to described movable body by described manual handle between this movable body and described torque transmission parts, these torque transmission parts and described power transfer unit and this movable body become and carry out action integratedly, when to be exceeded the described frictional force between this movable body and this torque transmission parts to the torque that this movable body applies by this manual handle, the integrality of these torque transmission parts and this power transfer unit and this movable body is removed.
In the valve positioner involved by the 1st or the 2nd invention, preferably, described frictional force generation part is the spring members to described movable body and described torque transmission parts force.
In the valve positioner involved by the 1st or the 2nd invention, preferably, be provided with nut, this nut adjusts the size of described spring members to the power that described movable body and described torque transmission parts apply by restraint location.
In the valve positioner involved by the 2nd invention, preferably, this valve positioner is provided with interlocking mechanism, when described manual handle and described movable body are notconnect state, this interlocking mechanism makes described motor action, and when this manual handle and this movable body are coupled condition, this interlocking mechanism makes this motor stop.
According to a kind of electric gate valve involved by described object the 3rd invention, comprise: the switching mechanism A with the lifting body of opening and closing stream, motor, the driving force of described motor is passed to the power transfer unit of described switching mechanism A, in described motor action process, the torque limiter this motor being stopped when described power transfer unit produces certain above load, and by described power transfer unit, described switching mechanism A being applied to the manual handle of power, this electric gate valve has the movable body rotated integratedly with described manual handle, be connected to the torque transmission parts of described power transfer unit, and between described movable body and described torque transmission parts, produce the frictional force generation part of the frictional force in the sense of rotation of described movable body, time below the described frictional force of the torque applied to described movable body by described manual handle between this movable body and described torque transmission parts, these torque transmission parts and described power transfer unit and this movable body become and carry out action integratedly, when to be exceeded the described frictional force between this movable body and this torque transmission parts to the torque that this movable body applies by this manual handle, the integrality of these torque transmission parts and this power transfer unit and this movable body is removed.
According to a kind of mortor operated valve involved by described object the 4th invention, comprise: the switching mechanism B with the rotor of opening and closing stream, motor, the driving force of described motor is passed to the power transfer unit of described switching mechanism B, in described motor action process, the torque limiter this motor being stopped when described power transfer unit produces certain above load, and by described power transfer unit, described switching mechanism B being applied to the manual handle of power, this mortor operated valve has the movable body rotated integratedly with described manual handle, be connected to the torque transmission parts of described power transfer unit, and between described movable body and described torque transmission parts, produce the frictional force generation part of the frictional force in the sense of rotation of described movable body, time below the described frictional force of the torque applied to described movable body by described manual handle between this movable body and described torque transmission parts, these torque transmission parts and described power transfer unit and this movable body become and carry out action integratedly, when to be exceeded the described frictional force between this movable body and this torque transmission parts to the torque that this movable body applies by this manual handle, the integrality of these torque transmission parts and this power transfer unit and this movable body is removed.
Invention effect:
At the valve positioner involved by the 1st invention, in electric gate valve involved by 2nd invention and the mortor operated valve involved by the 3rd invention, time below the frictional force of the torque being applied to movable body from manual handle between movable body and torque transmission parts, torque transmission parts and power transfer unit and movable body action integratedly, when the torque being applied to movable body from manual handle exceedes the frictional force between movable body and torque transmission parts, the integrality of torque transmission parts and power transfer unit and movable body is removed, therefore, limit due to manual handle operation at movable body, torque transmission parts, power transfer unit, the load that external mechanical etc. produce, can prevent from damaging, the generation of undesirable condition.
In valve positioner involved by 1st invention, when frictional force generation part be to movable body and torque transmission parts force spring members time, the structure that can limit the power passing to power transfer unit from manual handle in the operating process of simple designs manual handle, can avoid the situation that the structure of valve positioner complicates.
In the valve positioner involved by the 1st invention, when be provided with can adjust the nut of size of spring members to the power of movable body and torque transmission parts force by restraint location time, frictional force between movable body and torque transmission parts can be adjusted simply according to using the environment of valve positioner.
In the valve positioner involved by the 1st invention, manual handle and movable body can switch between coupled condition and notconnect state, this valve positioner is provided with interlocking mechanism, when manual handle and movable body are notconnect state, this interlocking mechanism can make motor action, when manual handle and movable body are coupled condition, this interlocking mechanism makes motor stop, in this case, when manual handle is connected with movable body, can prevent the driving force of motor from passing to manual handle by power transfer unit effectively, the Security of the personnel improving operator active handle can be realized.
Accompanying drawing explanation
Fig. 1 is the explanatory drawing of the valve positioner involved by one embodiment of the present invention.
Fig. 2 is the partial section of this valve positioner.
Fig. 3 is the skeleton diagram of the electric gate valve with this valve positioner.
Fig. 4 is the skeleton diagram of the mortor operated valve with this valve positioner.
Symbol description:
10: valve positioner
11: motor
12: power transfer unit
13: torque limiter
14: manual handle
15: output shaft
16: gate mechanism
17: butterfly mechanism
18: electric gate valve
19: lifting body
20: framework
21: mortor operated valve
22: rotor
23: framework
25: running shaft
26,27: gear
28: worm screw
29: axle
30: worm gear
31: sleeve
32: cartridge housing
33: housing parts
34: spring members
35: position detector
36: casing
38: slide blocks
39: spring
40: handle hook gripping member (Japanese: Ha Application De Le キ ャ ッ チ)
41: handle chassis
42: axle sleeve
43: movable body
44: clutch section
45 ~ 47: perforated plate
48: belleville spring
49,50: liner
51: nut
52: torque transmission parts
53: interlocking mechanism
54: bracket
Embodiment
Then, with reference to accompanying drawing, in conjunction with embodiment, the present invention is described, for understanding the present invention.
As shown in Figure 1 and Figure 2, the valve positioner 10 involved by one embodiment of the present invention has: the torque limiter 13 when power transfer unit 12 produces the load necessarily, motor 11 being stopped in motor 11, the power transfer unit 12 driving force of motor 11 being passed to external mechanical, motor 11 course of action and the manual handle 14 by power transfer unit 12 pairs of external mechanical applying power.
Power transfer unit 12 has the output shaft 15 being connected to external mechanical as shown in Figure 1.Output shaft 15 is carried out action by the rotation of the action of motor 11 or manually handle 14 and is supplied to external mechanical power.
The external mechanical of being carried out action by output shaft 15 transferring power has the gate mechanism (example of switching mechanism A) 16 shown in Fig. 3, the butterfly mechanism (example of switching mechanism B) 17 shown in Fig. 4, gate mechanism 16, butterfly mechanism 17 carry out the opening and closing of stream by the power transmitted by output shaft 15.
As shown in Figure 3, electric gate valve 18 can be formed mainly through valve positioner 10 and gate mechanism 16.Gate mechanism 16 has: be fixed on the lifting body 19 of the rectangular sheet material on output shaft 15 and the framework 20 of supporting elevation body 19.Lifting body 19 when motor 11 or manual handle 14 action and output shaft 15 1 lifting, closes closed channel in lower position, rises thus open stream from lower position.
In addition, as shown in Figure 4, mortor operated valve 21 can be formed mainly through valve positioner 10 and butterfly mechanism 17.Butterfly mechanism 17 has: be fixed on the rotor 22 of the rounded sheet material on output shaft 15 and be configured with the framework 23 of rotor 22 in inner side.Rotor 22 rotates together with output shaft 15 when motor 11 or manual handle 14 action, closes framework 23 inside and closes closed channel, rotate thus open stream from 0 degree of position 0 degree of position.In addition, although the butterfly mechanism 17 shown in Fig. 4 does not have speed reducer, but, also the butterfly mechanism with speed reducer can be connected with valve positioner 10 and form mortor operated valve.In addition, in present embodiment, rotor 22 is sheet material, and mortor operated valve 21 is so-called butterfly valves, but rotor also can adopt pellet part, and mortor operated valve is so-called ball valve in this case.
In electric gate valve 18 and mortor operated valve 21, the design of a part for valve positioner 10 is different.This is because output shaft 15 is elevated in electric gate valve 18, on the other hand, in mortor operated valve 21, output shaft 15 rotates.In present embodiment, be described centered by the valve positioner 10 being applicable to electric gate valve 18, the different part of the design for valve positioner 10 in electric gate valve 18 with mortor operated valve 21 carries out suitable explanation.
As shown in Figure 1, valve positioner 10 has DYN dynamic motor 11, and the running shaft 25 of this motor 11 is fixed with gear 26.The gear 27 that gear 26 and power transfer unit 12 have engages, and gear 27 is arranged on an end of the axle 29 being equipped with worm screw 28.
Further, be engaged on containing output shaft 15 in the worm gear 30 on worm screw 28, this worm gear 30 is that inner side forms female sleeve 31 admittedly.Sleeve 31 is rotatably installed on cartridge housing 32, and when worm screw 28 rotates together with axle 29, sleeve 31 rotates centered by output shaft 15.
In present embodiment, output shaft 15 is outside thread material, the internal thread engagement of the inner side of this output shaft 15 and sleeve 31.As shown in Figure 3, the underpart of output shaft 15 is fixed on lifting body 19, gate mechanism 16 be designed to into make lifting body 19 can not carry out except lifting except action, such as spinning movement.
Therefore, the rotating force being rotated by motor 11 action, running shaft 25 and produced, it is passed to sleeve 31 by gear 26, gear 27, axle 29, worm screw 28 and worm gear 30 and sleeve 31 is rotated.Further, when sleeve 31 rotates, the output shaft 15 engaged with the internal thread of sleeve 31 and lifting body 19 1 lifting.
Motor 11 can switch the sense of rotation of running shaft 25, and the lifting direction of lifting body 19 is determined by the sense of rotation of running shaft 25.In addition, in present embodiment, power transfer unit 12 is formed primarily of output shaft 15, gear 26, gear 27, worm screw 28, axle 29, worm gear 30, sleeve 31 and cartridge housing 32.
When for mortor operated valve 21 when, sleeve 31 and output shaft 15 are that key is connected.Output shaft 15 makes sleeve 31 rotate by the action of motor 11, thus, becomes rotate integratedly together with sleeve 31, the rotor 22 be fixed on output shaft 15 is rotated.
In addition, in mortor operated valve 21, output shaft 15 is not elevated.
At this, when the below of the lifting body 19 being in lifting position have object, between lifting body 19 and framework 20, be clamped with object time, the lifting action of lifting body 19 can be hindered.Under the state that the lifting action of lifting body 19 is hindered, when motor 11 continues action, motor 11, gear 26, gear 27 or lifting body 19 etc. may be caused to produce and to damage or produce undesirable condition.
Therefore, in motor 11 course of action, during the load that on power transfer unit 12, generation regulation is above, valve positioner 10 is provided with the torque limiter 13 that the action of motor 11 is stopped, the equipment preventing electric gate valve 18 from possessing, parts produce and damage or produce undesirable condition.
In present embodiment, torque limiter 13 judges on power transfer unit 12, whether create the above load of regulation according to the position of axle 29.
As shown in Figure 1 and Figure 2, in power transfer unit 12, be provided with in the side, the other end of axle 29 by the fixing housing parts 33 of not shown supporting part.In housing parts 33, be configured with spring members 34, spring members 34 exerts a force along the axis direction (in present embodiment, the direction at motor 11 place) of axle 29 to axle 29.
In motor 11 course of action, under the state that the lifting action of lifting body 19 is hindered, make worm gear 30 and sleeve 31 rotate required power together and do not hinder compared with the state of the lifting action of lifting body 19 large.Further, when the worm screw 28 engaged with worm gear 30 produce specify above load time, the contrary direction (namely away from the direction of motor 11) of axle 29 with resisting the force of spring members 34 to the force direction with spring members 34 is mobile.
As shown in Figure 1, torque limiter 13 is connected on worm screw 28, and this torque limiter 13 is designed to the movement that can detect shaft 29.Torque limiter 13 produces by checking the movement of shaft 29 to detect power transfer unit 12 situation specifying above load, and the motor 11 in action is stopped.
Motor 11 is connected in long-range not shown operational tip, and because operational tip can detect the state of motor 11, therefore, when the motor 11 in action stops, operational tip can detect the situation that motor 11 has stopped.Therefore, the operator of operation operational tip can learn the situation that motor 11 has stopped by operational tip, can learn that electric gate valve 18 produces exception.
Further, in valve positioner 10, near torque limiter 13, the position detector 35 of the position detecting lifting body 19 is provided with.
Position detector 35 calculates the position of lifting body 19 by the tachometer of axle 29, in motor 11 course of action, detects that lifting body 19 arrives the situation of prespecified upper limit position or lower position and motor 11 is stopped.
In addition, torque limiter 13, position detector 35 etc. are configured in the casing 36 shown in Fig. 3.
As shown in Figure 2, be fixed with circular manual handle 14 in housing parts 33, and the slide blocks 38 of the part being configured to covering shell parts 33 is installed.Slide blocks 38 can be retreated in predetermined range along the axis direction of axle 29, and this slide blocks 38 is applied the power to the direction away from motor 11 by the abutting spring 39 be configured between housing parts 33 and slide blocks 38.
In addition, slide blocks 38 can rotate centered by axle 29.
Slide blocks 38 is fixed with the handle chassis 41 that handle hook gripping member 40 hooks be arranged on housing parts 33 stop.Under the state that handle hook gripping member 40 hook stops handle chassis 41, slide blocks 38 resists the force of spring 39 and the position that is fixed near motor 11, when the hook of the handle chassis 41 produced by handle hook gripping member 40 stops status releasing, slide blocks 38 moves to the position away from motor 11.
The end (the other end) of the side contrary with the end (end) being provided with gear 27 of axle 29 is fixed with axle sleeve 42, axle sleeve 42 is provided with the movable body 43 being connected to manual handle 14.In present embodiment, axle sleeve 42 is connected with axle 29 key.
Slide blocks 38 has clutch section 44, and movable body 43 is the clutch component being designed to engage with this clutch section 44.In present embodiment, between the clutch section 44 of slide blocks 38 and movable body 43, adopt gear clutch.
By slide blocks 38 being configured in the position away from motor 11, thus, this clutch section 44 is engaged with movable body 43, thus this slide blocks 38 is connected on movable body 43, and movable body 43 is connected on manual handle 14 by slide blocks 38.Movable body 43 is connected on manual handle 14, rotates integratedly thus with manual handle 14.
Further, terminate in handle chassis 41 at handle hook gripping member 40 hook, slide blocks 38 be configured near motor 11 position state under, slide blocks 38 departs from from movable body 43, and movable body 43 and manual handle 14 become notconnect state.
Therefore, manual handle 14 and movable body 43 can switch according to the position of slide blocks 38 between coupled condition and notconnect state.
Axle sleeve 42 is provided with the perforated plate 45,46,47 rotated integrally with axle sleeve 42 and axle 29, between perforated plate 45,46, is configured with the belleville spring 48 being assemblied in axle sleeve 42.
Movable body 43 is arranged between perforated plate 46,47, and the side close contact of movable body 43 is on the liner 50 contacted with perforated plate 47, and the opposite side close contact of movable body 43 is on the liner 49 contacted with perforated plate 46.
In present embodiment, the torque transmission parts 52 of formation obtain torque by axle sleeve 42 and perforated plate 46,47 from movable body 43, and by transmission of torque to axle 29.
In addition, belleville spring 48 is examples for the spring members as frictional force generation part, and this belleville spring 48 makes to produce frictional force between movable body 43 and torque transmission parts 52.
(near motor 11 side) widens compared with other parts for the side of axle sleeve 42, and is designed to perforated plate 47 and cannot comes off from axle sleeve 42.Further, the opposite side (away from motor 11 side) of axle sleeve 42 is formed with internal thread, this internal thread is equipped with nut 51.
Belleville spring 48 is adjusted by the restraint location of nut 51 to the size of the power that perforated plate 45,46,47 and movable body 43 apply respectively.
When axle sleeve 42 is viewed from the axis direction of axle 29, the assembled portion of perforated plate 45,46,47, in oval, perforated plate 45,46,47 is formed with oval through hole respectively.Perforated plate 45,46,47 is arranged on axle sleeve 42 with the peripheral part close contact of respective through hole in the state of axle sleeve 42, fixing in the sense of rotation of axle 29 relative to axle sleeve 42 (become with axle sleeve 42 and rotate integratedly).In addition, the part that perforated plate 45,46,47 is widened by the side becoming axle sleeve 42 and the force produced by nut 51 and belleville spring 48, thus to be fixed on the axis direction of axle 29 on axle sleeve 42 (determine and axle sleeve 42 axis direction on fixed position).In addition, movable body 43 is designed to can rotate relative to axle sleeve 42.
Belleville spring 48 by exerting a force to perforated plate 45,46,47 and movable body 43, thus makes to produce frictional force between movable body 43 and perforated plate 46 and between movable body 43 and perforated plate 47.Refer to specifically between perforated plate 46 and liner 49, between liner 49 and movable body 43 between so-called movable body 43 and perforated plate 46, refer between so-called movable body 43 and perforated plate 47 between movable body 43 and liner 50 and between liner 50 and perforated plate 47.
Liner 49,50 can be formed by materials such as semimetal system, carbon metal system, metal systems, and in present embodiment, it is formed by non-asbestos such as being mixed with metal powder, aromatic polyamide fiber, resin.
Liner 49,50 is set to: adjust the frictional force size between movable body 43 and perforated plate 46 and the frictional force size between movable body 43 and perforated plate 47 respectively, to regulate the torque of transmitting from movable body 43 to perforated plate 46 and the torque of transmitting from movable body 43 to perforated plate 47 respectively.
Under the state that slide blocks 38 and movable body 43 are connected to, when manual handle 14 rotates, torque is transmitted to movable body 43 from manual handle 14 by slide blocks 38, and movable body 43 rotates together with manual handle 14.
In movable body 43 rotary course, between movable body 43 and perforated plate 46 and between movable body 43 and perforated plate 47, the sense of rotation of movable body 43 produces frictional force.When torque (rotating force) frictional force between movable body 43 and perforated plate 46 transmitted from manual handle 14 to movable body 43 and the frictional force between movable body 43 and perforated plate 47 (stiction) below time, movable body 43 and perforated plate 46,47, axle sleeve 42 and axle 29 become and rotate (namely, manual handle 14 and power transfer unit 12 become action integratedly) integratedly.
Manual handle 14 and power transfer unit 12 become in the process of action integratedly, the state that the lifting action that lifting body 19 occurs is hindered, such as, lifting body 19 in being elevated and the state of bar contact, when increase is applied to the power of manual handle 14, the torque applied to movable body 43 by manual handle 14 also increases.
And, when the frictional force (stiction) that the size of the torque applied to movable body 43 by manual handle 14 produces between movable body 43 and perforated plate 46 and between movable body 43 and perforated plate 47 below time, movable body 43 and perforated plate 46,47, axle sleeve 42 and axle 29 become to rotate integratedly or become and remain static integratedly.
On the other hand, when by manual handle 14 to the level of torque that movable body 43 applies exceed to produce frictional force (stiction) between movable body 43 and perforated plate 46 and between movable body 43 and perforated plate 47 time, perforated plate 46,47, axle sleeve 42 and axle 29 removed with the integrality of movable body 43.In this condition, movable body 43 from perforated plate 46,47, axle sleeve 42 and axle 29 independent and carry out action, manual handle 14, slide blocks 38 and movable body 43 rotate, and the component parts of axle sleeve 42 and perforated plate 45,46,47 and the power transfer unit 12 that comprises axle 29 is static.
Now, the torque applied to perforated plate 46,47 by movable body 43 is limited by the frictional force (kinetic force of friction) produced between movable body 43 and perforated plate 46 and between movable body 43 and perforated plate 47.
Therefore, the load that power transfer unit 12, gate mechanism 16 etc. produce is restricted, and can prevent power transfer unit 12, lifting body 19 etc. from producing situation about damaging.
So, axle sleeve 42, perforated plate 46,47 and belleville spring 48 can adjust by the transmission of manual handle 14 to the power of axle 29.
Specifically, when the torque applied by manual handle 14 pairs of movable bodys 43 is below prescribed level, the torque applied by manual handle 14 pairs of movable bodys 43 passes to power transfer unit 12 without restriction, and manual handle 14 and movable body 43 and axle sleeve 42, perforated plate 46,47 and power transfer unit 12 become and carry out action integratedly.
And, when the torque applied by manual handle 14 pairs of movable bodys 43 exceedes the size of regulation, the torque applied by movable body 43 pairs of power transfer units 12 is restricted, and manual handle 14 and movable body 43 and axle sleeve 42, perforated plate 46,47 and power transfer unit 12 become the state can carrying out action independently.
In addition, as shown in Figure 1 and Figure 2, housing parts 33 is provided with the interlocking mechanism 53 making motor 11 be in halted state.Interlocking mechanism 53 has the bracket 54 be arranged on by handle hook gripping member 40 on slide blocks 38, and bracket 54 is retreated together with slide blocks 38.
When manual handle 14 and movable body 43 become the position that notconnect state, bracket 54 be configured near motor 11 together with slide blocks 38, interlocking mechanism 53 makes motor 11 be in can the state of action.
Therefore, when manual handle 14 and movable body 43 are notconnect state, motor 11 can carry out action and apply rotating force to power transfer unit 12.
On the other hand, when the hook of the handle chassis 41 produced by handle hook gripping member 40 stops the position that status releasing, bracket 54 be configured in away from motor 11 together with slide blocks 38, interlocking mechanism 53 makes motor 11 be in halted state.
Therefore, under the state that manual handle 14 is connected with movable body 43, motor 11 is in halted state, prevents the driving force of the motor 11 when rotary manual handle 14 to be passed to the situation of manual handle 14 by power transfer unit 12 and torque transmission parts 52.
By this structure, in the process of operator's operator active handle 14, the driving force of motor 11 can be prevented effectively to be delivered to the situation of manual handle 14, comparatively effective at secure context.
Above, describe embodiments of the present invention, but the present invention is not limited to aforesaid way, the change etc. not departing from the condition of main points is Applicable scope of the present invention.
Such as, being not limited to belleville spring to the spring members of movable body and torque transmission parts force, also can be helical spring.

Claims (9)

1. a valve positioner, comprises: motor; The driving force of described motor is passed to the power transfer unit of the switching mechanism of described valve; In described motor action process, the torque limiter this motor being stopped when described power transfer unit produces the load necessarily; And by described power transfer unit, the switching mechanism of described valve is applied to the manual handle of power, the feature of this valve positioner is,
This valve positioner has the movable body rotated integratedly with described manual handle, be connected to the torque transmission parts of described power transfer unit, and between described movable body and described torque transmission parts, produce the frictional force generation part of the frictional force in the sense of rotation of described movable body, time below the described frictional force of the torque applied to described movable body by described manual handle between this movable body and described torque transmission parts, these torque transmission parts and described power transfer unit and this movable body become and carry out action integratedly, when to be exceeded the described frictional force between this movable body and this torque transmission parts to the torque that this movable body applies by this manual handle, the integrality of these torque transmission parts and this power transfer unit and this movable body is removed.
2. valve positioner according to claim 1, is characterized in that, described frictional force generation part is the spring members to described movable body and described torque transmission parts force.
3. valve positioner according to claim 2, is characterized in that, is provided with nut, and this nut adjusts the size of described spring members to the power that described movable body and described torque transmission parts apply by restraint location.
4. a valve positioner, comprises: motor; The driving force of described motor is passed to the power transfer unit of the switching mechanism of described valve; In described motor action process, the torque limiter this motor being stopped when described power transfer unit produces the load necessarily; And by described power transfer unit, the switching mechanism of described valve is applied to the manual handle of power, the feature of this valve positioner is,
This valve positioner has movable body, and described manual handle and described movable body can switch between coupled condition and notconnect state, and under described coupled condition, described movable body and described manual handle rotate integratedly, be connected to the torque transmission parts of described power transfer unit, and between described movable body and described torque transmission parts, produce the frictional force generation part of the frictional force in the sense of rotation of described movable body, time below the described frictional force of the torque applied to described movable body by described manual handle between this movable body and described torque transmission parts, these torque transmission parts and described power transfer unit and this movable body become and carry out action integratedly, when to be exceeded the described frictional force between this movable body and this torque transmission parts to the torque that this movable body applies by this manual handle, the integrality of these torque transmission parts and this power transfer unit and this movable body is removed.
5. valve positioner according to claim 4, is characterized in that, described frictional force generation part is the spring members to described movable body and described torque transmission parts force.
6. valve positioner according to claim 5, is characterized in that, is provided with nut, and this nut adjusts the size of described spring members to the power that described movable body and described torque transmission parts apply by restraint location.
7. the valve positioner according to any one of claim 4-6, it is characterized in that, this valve positioner is provided with interlocking mechanism, when described manual handle and described movable body are notconnect state, this interlocking mechanism makes described motor action, and when this manual handle and this movable body are coupled condition, this interlocking mechanism makes this motor stop.
8. an electric gate valve, comprises: the switching mechanism (A) with the lifting body of opening and closing stream; Motor; The driving force of described motor is passed to the power transfer unit of described switching mechanism (A); In described motor action process, the torque limiter this motor being stopped when described power transfer unit produces certain above load; And by described power transfer unit, described switching mechanism (A) is applied to the manual handle of power, the feature of this electric gate valve is,
This electric gate valve has the movable body rotated integratedly with described manual handle, be connected to the torque transmission parts of described power transfer unit, and between described movable body and described torque transmission parts, produce the frictional force generation part of the frictional force in the sense of rotation of described movable body, time below the described frictional force of the torque applied to described movable body by described manual handle between this movable body and described torque transmission parts, these torque transmission parts and described power transfer unit and this movable body become and carry out action integratedly, when to be exceeded the described frictional force between this movable body and this torque transmission parts to the torque that this movable body applies by this manual handle, the integrality of these torque transmission parts and this power transfer unit and this movable body is removed.
9. a mortor operated valve, comprises: the switching mechanism (B) with the rotor of opening and closing stream; Motor; The driving force of described motor is passed to the power transfer unit of described switching mechanism (B); In described motor action process, the torque limiter this motor being stopped when described power transfer unit produces certain above load; And by described power transfer unit, described switching mechanism (B) is applied to the manual handle of power, the feature of this mortor operated valve is,
This mortor operated valve has the movable body rotated integratedly with described manual handle, be connected to the torque transmission parts of described power transfer unit, and between described movable body and described torque transmission parts, produce the frictional force generation part of the frictional force in the sense of rotation of described movable body, time below the described frictional force of the torque applied to described movable body by described manual handle between this movable body and described torque transmission parts, these torque transmission parts and described power transfer unit and this movable body become and carry out action integratedly, when to be exceeded the described frictional force between this movable body and this torque transmission parts to the torque that this movable body applies by this manual handle, the integrality of these torque transmission parts and this power transfer unit and this movable body is removed.
CN201310039806.7A 2012-02-17 2013-01-31 Valve positioner and electric gate valve and mortor operated valve Active CN103256420B (en)

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