CN104089076B - A kind of diaphragm type pneumatic rotary actuator - Google Patents
A kind of diaphragm type pneumatic rotary actuator Download PDFInfo
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- CN104089076B CN104089076B CN201410333467.8A CN201410333467A CN104089076B CN 104089076 B CN104089076 B CN 104089076B CN 201410333467 A CN201410333467 A CN 201410333467A CN 104089076 B CN104089076 B CN 104089076B
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- valve
- push rod
- pneumatic
- rod
- upper shell
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Classifications
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- 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
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/126—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like
- F16K31/1262—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like one side of the diaphragm being spring loaded
-
- 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
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0025—Electrical or magnetic means
- F16K37/0041—Electrical or magnetic means for measuring valve parameters
Abstract
A kind of diaphragm type pneumatic rotary actuator.Relate to pneumatic actuator field.Propose a kind of delicate structure, the property taken into account good, and degree of cooperation is high, after using, can effectively be fit to the angle stroke class valve of all size, and then the diaphragm type pneumatic rotary actuator that open amount and the output moment of torsion of valve are accurately controlled.For driving the valve rod of valve, described pneumatic actuator includes upper shell, lower house, push rod drive mechanism, push rod, upper frame, underframe, link gear, feedback mechanism and extreme position trigger mechanism；Described upper shell, lower house, upper frame, underframe are fixedly connected sequentially from top to bottom, and described upper frame includes epicoele and the cavity of resorption being connected as a single entity, and have dividing plate, offer screwed hole in the middle part of described dividing plate between described epicoele and cavity of resorption.Present configuration is simple, production cost is low, with the torque characteristic curve matching of valve.Its Adjustment precision is high, Adjustment effect is good.
Description
Technical field
The present invention relates to pneumatic actuator field, particularly relate to the improvement of He Ji diaphragm type pneumatic rotary actuator.
Background technology
At present, the nuclear island of China's nuclear power station and conventional island many uses angle stroke class valve, and control this type of valve by pneumatic actuator.Representative portion entitled " core level film type pneumatic actuating mechanism ", the document of Application No. " 201120374498.X " as filed in the applicant and JIUYUE in 2011 29 days, the applicant proposes the core level film type pneumatic actuating mechanism that a kind of simple in construction, shock strength are high and are easily installed in this case.
But, owing to the material of valve, manufacture equipment, manufacturing process etc. aspect also exists certain difference, and the valve of different sources manufacture there is also certain difference in performance；Therefore, pneumatic actuator and valve are usually present matching difficulty big (output torque), control accuracy is poor, degree of cooperation is low and the defect of the property taken into account difference.
Summary of the invention
The present invention is directed to problem above, propose a kind of delicate structure, the property taken into account good, and degree of cooperation is high, after using, can effectively be fit to the angle stroke class valve of all size, and then the diaphragm type pneumatic rotary actuator that open amount and the output moment of torsion of valve are accurately controlled.
The technical scheme is that the valve rod for driving valve, described pneumatic actuator includes upper shell, lower house, push rod drive mechanism, push rod, upper frame, underframe, link gear, feedback mechanism and extreme position trigger mechanism；
Described upper shell, lower house, upper frame, underframe are fixedly connected sequentially from top to bottom, and described upper frame includes epicoele and the cavity of resorption being connected as a single entity, and have dividing plate, offer screwed hole in the middle part of described dividing plate between described epicoele and cavity of resorption；
Described push rod is vertically arranged and pumps under the driving of push rod drive mechanism, and the upper end of described push rod is stretched between described upper shell and lower house and the lower end of push rod stretches out screwed hole until lower intracavity；Described valve rod is horizontally set in the middle part of described underframe, and described link gear is connected between described push rod and valve rod so that the up and down motion of push rod is rotated around himself axle center by link gear band ovable valve stem.
Described push rod drive mechanism works under the effect of source of the gas, described push rod drive mechanism includes diaphragm, pallet, groups of springs, spring base and adjustment bolt, described source of the gas connects with described upper shell, described diaphragm be fixedly connected between described upper shell and lower house and and described upper shell between hermetic seal, described pallet is fixedly connected on the top of described push rod and is against on the bottom surface of described diaphragm；Described adjustment bolt is socketed described push rod and threadeding with described screwed hole, and described spring base is socketed described push rod and is against on the end face of described adjustment bolt, push rod described in described groups of springs empty set and being connected between described pallet and spring base.
Described groups of springs includes the spring of some concentrics.
Described link gear includes jaw, connecting rod and arm bar, described jaw is fixedly connected on described push rod bottom, described arm bar be socketed on described valve rod and with described valve rod synchronous rotary, the top of described connecting rod is hinged with jaw by shipping and reselling on another market, and the bottom of described connecting rod is hinged with arm bar by shipping and reselling on another market.
The two ends of described connecting rod are connected by joint ball bearing between shipping and reselling on another market described in two.
Described link gear also includes that position-limit mechanism, described position-limit mechanism include that some caging bolts, some described caging bolts are vertically arranged and are removably attachable on the bottom surface of described underframe, and some described caging bolts are respectively positioned on below described arm bar.
Described feedback mechanism includes shift fork, pneumatic positioner valve, pneumatic amplifier, electropneumatic transducer, filtering pressure reducing valve and control signal input source；
Described shift fork is slidably connected in the cavity of resorption of described upper frame and fixes with the bottom of described push rod and is connected, and described shift fork is connected with described pneumatic positioner valve and described pneumatic positioner valve is fixedly connected on outside upper frame；
Described pneumatic amplifier is serially connected between described source of the gas and described upper shell, described filtering pressure reducing valve is serially connected between described source of the gas and described pneumatic positioner valve, and described electropneumatic transducer is serially connected between described filtering pressure reducing valve and pneumatic positioner valve and connects with described control signal input source.
Described extreme position trigger mechanism includes tabletting one, tabletting two and a pair limit switch, described tabletting one and tabletting two are all removably attachable to one end of described valve rod, during described in a pair, limit switch is fixedly connected on underframe and lay respectively at below tabletting one and tabletting two.
Present configuration is simple, production cost is low, improves upper and lower casing structure, has saved production cost, pneumatic positioner valve is connected directly between on upper frame, structure is the compactest, substantially increases the rigidity of structure, it is ensured that upper frame and the connection shock strength of pneumatic accessories.Additionally, diaphragm is two glue one cloth structures, lower thickness, hardness deliquescing and be easily installed.
Compared with prior art, beneficial effects of the present invention is as follows:
One, owing to being provided with adjustment bolt, thus finely tune output torque by the way of the decrement of fine setting spring, so make pneumatic actuator can more accurate and valve matched, i.e. with the torque characteristic curve matching of valve.
Two, in the present invention connecting rod by shipping and reselling on another market respectively and arm bar, jaw define chain connection and shipping and reselling on another market and be provided with joint ball bearing between connecting rod, thus ensure that and pneumatic actuator running does not haves the phenomenon that card is firm, obstruction actuator is properly functioning, joint ball bearing allows connecting rod trace radially to tilt simultaneously.
Three, with between the spring of conventional angular stroke pneumatic diaphragm actuator without compared with guide post, in the pneumatic actuator of this case, groups of springs empty set is on push rod so that spring is played guide post effect by push rod, so that stability more can be guaranteed.
Four, the caging bolt in this case is able to ensure that the motion of valve rod is in maximum travel limit, after once arriving range, limited location bolt bears the moment being transmitted to by push rod, and then effectively guarantees the safety and reliability of valve rod.
Five, by being adjusted the concrete numerical value in control signal input source in this case, and then effectively achieving the adjustment of valve angle path increment, its Adjustment precision is high, Adjustment effect is good.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention,
Fig. 2 is the partial enlarged drawing in Fig. 1 at A,
Fig. 3 is the axonometric chart of Fig. 1,
Fig. 4 is link gear and the axonometric chart of extreme position trigger mechanism in the present invention,
Fig. 5 is the structure principle chart of feedback mechanism in the present invention；
In figure, 1 is upper shell, and 2 is diaphragm, and 3 is pallet, and 5 is lower house, 6 is push rod, and 7 is upper frame, and 8 is groups of springs, and 9 is spring base, 10 is pneumatic positioner valve, and 11 is to adjust bolt, and 12 is jaw, and 13 is to ship and resell on another market, 14 is connecting rod, and 15 is joint ball bearing, and 16 is valve rod, 17 is arm bar, and 18 is caging bolt, and 19 is underframe, 20 is tabletting one, and 21 is shift fork, and 24 is limit switch.
Detailed description of the invention
As Figure 1-5, for driving the valve rod 16 of valve, described pneumatic actuator includes upper shell 1, lower house 5, push rod drive mechanism, push rod 6, upper frame 7, underframe 19, link gear, feedback mechanism and extreme position trigger mechanism to the present invention；
Described upper shell 1, lower house 5, upper frame 7, underframe 19 are fixedly connected sequentially from top to bottom, and described upper frame 7 includes epicoele and the cavity of resorption being connected as a single entity, and have dividing plate, offer screwed hole in the middle part of described dividing plate between described epicoele and cavity of resorption；
Described push rod 6 is vertically arranged and pumps under the driving of push rod drive mechanism, and the upper end of described push rod 6 is stretched between described upper shell 1 and lower house 5 and the lower end of push rod 6 stretches out screwed hole until lower intracavity；Described valve rod 16 is horizontally set in the middle part of described underframe 19, and described link gear is connected between described push rod 6 and valve rod 16 so that the up and down motion of push rod 6 is rotated around himself axle center by link gear band ovable valve stem 16.
Described push rod drive mechanism works under the effect of source of the gas, described push rod drive mechanism includes that diaphragm 2(diaphragm contains upper and lower two-layer glue, the middle terylene that adds presss from both sides cloth, for plastic clip cloth structure), pallet 3, groups of springs 8, spring base 9 and adjust bolt 11, described source of the gas connects with described upper shell 1, described diaphragm 2 be fixedly connected between described upper shell 1 and lower house 5 and and described upper shell 1 between hermetic seal, described pallet 3 is fixedly connected on the top of described push rod 6 and is against on the bottom surface of described diaphragm 2；Described adjustment bolt 11 is socketed described push rod 6 and threadeds with described screwed hole, described spring base 9 be socketed described push rod 6 and be against described adjustment bolt 11 end face on, push rod 6 described in described groups of springs 8 empty set and being connected between described pallet 3 and spring base 9.Its work process is as follows:
1), source of the gas is when pressurizeing, and is expanded by diaphragm applied force, is deformed downwards, thus oppresses pallet and overcome the restoring force effect of groups of springs to drive push rod descending；
2), source of the gas is when reducing pressure, and pallet is affected by the restoring force of groups of springs, is shifted up by drive push rod.
This case has additional below spring base the adjustment bolt threadeded with screwed hole, adjusts matched in clearance and the bottom surface with spring base between bolt and push rod and fit；So, turn adjust bolt then can up-down adjustment spring base, thus the decrement of groups of springs original state is adjusted, and then the downstream pressure of push rod is effectively regulated, and finally realizing after link gear the regulation of torque on valve rod.Realize the meaning of torque adjustment: fitting degree is high, fitting effect is good.
Described groups of springs 8 includes the spring of some concentrics.So, this case by increasing the restoring force that increase effectively unit length by the way of number of springs, thus can effectively shorten the length of push rod, and then be effectively saved cost, reduce the overall volume of equipment.
Described groups of springs 8 includes a pair oppositely oriented spring.
Described link gear includes jaw 12, connecting rod 14 and arm bar 17, described jaw 12 is fixedly connected on described push rod 6 bottom, described arm bar 17 be socketed on described valve rod 16 and with described valve rod 16 synchronous rotary (valve rod and arm bar synchronous axial system can be made by the bonded form such as square key, spline), the top of described connecting rod 14 is 13 hinged with jaw 12 by shipping and reselling on another market, and the bottom of described connecting rod 14 is 13 hinged with arm bar 17 by shipping and reselling on another market.So, the vertical displacement amount of push rod can be changed into the rotation amount of arm bar and valve rod, its delicate structure, stability are high and force transmission effect is good.
The two ends of described connecting rod 14 are connected by joint ball bearing 15 between 13 with shipping and reselling on another market described in two.Thus ensure that and pneumatic actuator running does not haves the phenomenon that card is firm, obstruction actuator is properly functioning, joint ball bearing allows also to connecting rod trace inclination radially simultaneously.
Described link gear also includes position-limit mechanism, described position-limit mechanism includes some caging bolts 18, some described caging bolts 18 are vertically arranged and are removably attachable on the bottom surface of described underframe 19, and some described caging bolts 18 are respectively positioned on below described arm bar 17.So, turn caging bolt regulates the relative position of itself and underframe, thus effectively achieves the effect to valve rod angle stroke adjustment.Compared with immobilizing with the stroke limit of traditional pneumatic diaphragn actuating mechanism, the caging bolt of this case ensure that pneumatic actuator trace regulation effective travel in maximum travel limit.
Described feedback mechanism includes shift fork 21, pneumatic positioner valve 10, pneumatic amplifier, electropneumatic transducer, filtering pressure reducing valve and control signal input source；
Described shift fork 21 is slidably connected in the cavity of resorption of described upper frame 7 and fixes with the bottom of described push rod 6 and is connected, and described shift fork 21 is connected with described pneumatic positioner valve 10 and described pneumatic positioner valve 10 is fixedly connected on outside upper frame 7；So, the real-time position information (can converse the Real-Time Switch amount information of valve) of push rod can be fed back in pneumatic positioner valve by shift fork；
Described pneumatic amplifier is serially connected between described source of the gas and described upper shell 1, described filtering pressure reducing valve is serially connected between described source of the gas and described pneumatic positioner valve, and described electropneumatic transducer is serially connected between described filtering pressure reducing valve and pneumatic positioner valve and connects with described control signal input source.Its work process is: source of the gas is via the operating air pressure being converted to 0.3MPa after filtering pressure reducing valve, one tunnel is delivered in pneumatic positioner valve, another road is delivered in electropneumatic transducer, and after jointly acting on 4-20mA control signal in electropneumatic transducer in incoming pneumatic positioner valve；Meanwhile, another road air pressure is after source of the gas is derived, and after the pneumatic amplifier that controlled by pneumatic positioner valve, enters between upper shell and diaphragm, completes the adding of " quantitatively ", reduces pressure.Specifically: the 4-20mA control signal incoming by control signal input source and the 0-90 ° of open position linearly corresponding relation of valve, only need during use the concrete numerical value of control signal is adjusted, the accurate adjustment of valve opening amount can be realized, it is achieved thereby that to the trace of valve angle stroke, quantitatively and accurately adjust.
Described extreme position trigger mechanism includes tabletting 1, tabletting two and a pair limit switch 24, described tabletting 1 and tabletting two are all removably attachable to one end of described valve rod 16, during described in a pair, limit switch 24 is fixedly connected on underframe 19 and lay respectively at below tabletting 1 and tabletting two.During use, tabletting one, two will will be positioned at the limit switch of each lower section by tabletting 21, respectively triggering when valve rod goes to standard-sized sheet or full-shut position with valve rod synchronous axial system, thus realize the feedback of position signalling.
Claims (6)
1. a diaphragm type pneumatic rotary actuator, for driving the valve rod of valve, it is characterized in that, described pneumatic actuator includes upper shell, lower house, push rod drive mechanism, push rod, upper frame, underframe, link gear, feedback mechanism and extreme position trigger mechanism；
Described upper shell, lower house, upper frame, underframe are fixedly connected sequentially from top to bottom, and described upper frame includes epicoele and the cavity of resorption being connected as a single entity, and have dividing plate, offer screwed hole in the middle part of described dividing plate between described epicoele and cavity of resorption；
Described push rod is vertically arranged and pumps under the driving of push rod drive mechanism, and the upper end of described push rod is stretched between described upper shell and lower house and the lower end of push rod stretches out screwed hole until lower intracavity；Described valve rod is horizontally set in the middle part of described underframe, and described link gear is connected between described push rod and valve rod so that the up and down motion of push rod is rotated around himself axle center by link gear band ovable valve stem；
Described push rod drive mechanism works under the effect of source of the gas, described push rod drive mechanism includes diaphragm, pallet, groups of springs, spring base and adjustment bolt, described source of the gas connects with described upper shell, described diaphragm be fixedly connected between described upper shell and lower house and and described upper shell between hermetic seal, described pallet is fixedly connected on the top of described push rod and is against on the bottom surface of described diaphragm；Described adjustment bolt is socketed described push rod and threadeding with described screwed hole, and described spring base is socketed described push rod and is against on the end face of described adjustment bolt, push rod described in described groups of springs empty set and being connected between described pallet and spring base；
Described feedback mechanism includes shift fork, pneumatic positioner valve, pneumatic amplifier, electropneumatic transducer, filtering pressure reducing valve and control signal input source；
Described shift fork is slidably connected in the cavity of resorption of described upper frame and fixes with the bottom of described push rod and is connected, and described shift fork is connected with described pneumatic positioner valve and described pneumatic positioner valve is fixedly connected on outside upper frame；
Described pneumatic amplifier is serially connected between described source of the gas and described upper shell, described filtering pressure reducing valve is serially connected between described source of the gas and described pneumatic positioner valve, and described electropneumatic transducer is serially connected between described filtering pressure reducing valve and pneumatic positioner valve and connects with described control signal input source.
A kind of diaphragm type pneumatic rotary actuator the most according to claim 1, it is characterised in that described groups of springs includes the spring of some concentrics.
A kind of diaphragm type pneumatic rotary actuator the most according to claim 1, it is characterized in that, described link gear includes jaw, connecting rod and arm bar, described jaw is fixedly connected on described push rod bottom, described arm bar be socketed on described valve rod and with described valve rod synchronous rotary, the top of described connecting rod is hinged with jaw by shipping and reselling on another market, and the bottom of described connecting rod is hinged with arm bar by shipping and reselling on another market.
A kind of diaphragm type pneumatic rotary actuator the most according to claim 3, it is characterised in that the two ends of described connecting rod are connected by joint ball bearing between shipping and reselling on another market described in two.
A kind of diaphragm type pneumatic rotary actuator the most according to claim 3, it is characterized in that, described link gear also includes position-limit mechanism, described position-limit mechanism includes some caging bolts, some described caging bolts are vertically arranged and are removably attachable on the bottom surface of described underframe, and some described caging bolts are respectively positioned on below described arm bar.
A kind of diaphragm type pneumatic rotary actuator the most according to claim 1, it is characterized in that, described extreme position trigger mechanism includes tabletting one, tabletting two and a pair limit switch, described tabletting one and tabletting two are all removably attachable to one end of described valve rod, during described in a pair, limit switch is fixedly connected on underframe and lay respectively at below tabletting one and tabletting two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410333467.8A CN104089076B (en) | 2014-07-14 | 2014-07-14 | A kind of diaphragm type pneumatic rotary actuator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410333467.8A CN104089076B (en) | 2014-07-14 | 2014-07-14 | A kind of diaphragm type pneumatic rotary actuator |
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| Publication Number | Publication Date |
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| CN104089076A CN104089076A (en) | 2014-10-08 |
| CN104089076B true CN104089076B (en) | 2016-08-17 |
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| CN201410333467.8A Active CN104089076B (en) | 2014-07-14 | 2014-07-14 | A kind of diaphragm type pneumatic rotary actuator |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105022407B (en) * | 2015-08-07 | 2018-02-13 | 邸达 | A kind of angle lead limit switch |
| CN105422969A (en) * | 2015-12-21 | 2016-03-23 | 杭州江南控制阀有限公司 | Long-stroke valve regulating mechanism |
| CN110307380A (en) * | 2019-07-16 | 2019-10-08 | 艾思瑞流体控制有限公司 | A method of extending regulating valve service life in water supply recycling |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101871544A (en) * | 2010-06-13 | 2010-10-27 | 无锡智能自控工程有限公司 | Manual and automatic integrated combination actuator |
| KR20130089153A (en) * | 2010-06-07 | 2013-08-09 | 버매드 씨에스 엘티디. | Hydraulic torrent control valve |
| CN203948751U (en) * | 2014-07-14 | 2014-11-19 | 扬州电力设备修造厂 | Diaphragm type pneumatic rotary actuator |
-
2014
- 2014-07-14 CN CN201410333467.8A patent/CN104089076B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130089153A (en) * | 2010-06-07 | 2013-08-09 | 버매드 씨에스 엘티디. | Hydraulic torrent control valve |
| CN101871544A (en) * | 2010-06-13 | 2010-10-27 | 无锡智能自控工程有限公司 | Manual and automatic integrated combination actuator |
| CN203948751U (en) * | 2014-07-14 | 2014-11-19 | 扬州电力设备修造厂 | Diaphragm type pneumatic rotary actuator |
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| CN104089076A (en) | 2014-10-08 |
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Address after: 225003 Wenchang Middle Road, Jiangsu, China, No. 77, No. Applicant after: Company limited of Yangzhou Electric Power Equipment Repair & Manufacture Factory Address before: 225003 Wenchang Middle Road, Jiangsu, China, No. 77, No. Applicant before: Yangzhou Electric Power Equipment Repair & Manufacture Factory |
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