CN104565508A - Transverse-mounting type pneumatic piston executing mechanism of angular travel adjusting valve - Google Patents
Transverse-mounting type pneumatic piston executing mechanism of angular travel adjusting valve Download PDFInfo
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- CN104565508A CN104565508A CN201410831182.7A CN201410831182A CN104565508A CN 104565508 A CN104565508 A CN 104565508A CN 201410831182 A CN201410831182 A CN 201410831182A CN 104565508 A CN104565508 A CN 104565508A
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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
- F16K31/14—Actuating devices; Operating means; Releasing devices actuated by fluid for mounting on, or in combination with, hand-actuated valves
- F16K31/143—Actuating devices; Operating means; Releasing devices actuated by fluid for mounting on, or in combination with, hand-actuated valves the fluid acting on a piston
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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
- 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
- F16K37/0008—Mechanical means
- F16K37/0016—Mechanical means having a graduated scale
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Actuator (AREA)
- Mechanically-Actuated Valves (AREA)
Abstract
The invention relates to the technical field of adjusting valves, and provides a transverse-mounting type pneumatic piston executing mechanism of an angular travel adjusting valve. The transverse-mounting type pneumatic piston executing mechanism comprises a box body, wherein a first air cylinder is connected with a second air cylinder through the box body, the two ends of a piston rod respectively penetrate into the first air cylinder and the second air cylinder, and are connected with a first piston body and a second piston body, a first fork part and a second fork part which are arranged opposite to each other are arranged at one end of a shift fork body, the other end of the shift fork body is connected with a rotary shaft, the piston rod is positioned between the first fork part and the second fork part, two slide block bodies are respectively embedded into the corresponding fork openings, a slide block pin penetrates through a block spin connecting hole and a slide block pin connecting hole to connect the slide block bodies and the piston rod, and a clutch manual operation mechanism comprises a worm gear, an eccentric sleeve, a worm, a worm shaft and a hand wheel. The transverse-mounting type pneumatic piston executing mechanism has the advantages that the operation can be switched to the manual operation when the automatic control of the executing mechanism fails, and the operation is switched to the automatic control after the failure is eliminated; the opening degree position of the adjusting valve can be monitored, and the accuracy is high.
Description
Technical field
The present invention relates to modulating valve technical field, particularly relate to a kind of horizontally loaded type Pneumatic piston actuator of angular stroke control valve.
Background technique
Pneumatic angle stroke control valve, as O type ball valve, V-type ball valve, butterfly valve, eccentric valve, check valve etc. are widely used in the automatic control of the industrial processs such as chemical industry, oil, rock gas, metallurgy, power station, food, papermaking, wide application, use amount is large.At present, the angle stroke pneumatic piston actuator that Pneumatic angle stroke control valve is joined, must another tennis partner's pneumatic operating mechanism product as there being hand behaviour function, and user observes the control position of modulating valve, also separately must join position indicating device.Because another tennis partner's pneumatic operating mechanism and position indicating device not only make the volume of actuator become large, inconvenient operation, total price is expensive, profile unsightly, and during due to manual-operating mechanism is connected with Pneumatic piston actuator with position indicating device, required union piece is more, and accumulated error is comparatively large, causes the control accuracy of angular stroke control valve to be deteriorated.
Summary of the invention
The shortcoming of prior art in view of the above, the technical problem that the present invention solves is to provide a kind of compact structure, easy to operate, can gather manually and automatic operation function, and valve position deixis is in the horizontally loaded type Pneumatic piston actuator of the angular stroke control valve of one.
For achieving the above object and other relevant objects, the invention provides a kind of horizontally loaded type Pneumatic piston actuator of angular stroke control valve, comprising: casing; First cylinder, the second cylinder, described first cylinder is connected with described second cylinder by described casing; The inside of described first cylinder and described second cylinder is respectively equipped with first piston body and the second piston only; Piston rod, the two ends of described piston rod penetrate the inside in described first cylinder and described second cylinder respectively, the two ends of described piston rod are connected with described first piston body and described second piston only respectively, described piston rod is provided with slider pin attachment hole, and the medial axis of described slider pin attachment hole is vertical with the medial axis of described piston rod; Shift fork, be arranged at the inside of described casing, one end of the body of described shift fork is provided with the first fork and the second fork that are oppositely arranged, described first fork and described second fork are equipped with prong, the other end connection rotating shaft of the body of described shift fork, described piston rod passes from the gap between described first fork and described second fork; Two slider body, be embedded in the prong of described first fork accordingly and the prong of described second fork respectively, the length of described prong is greater than the length of described slider body, and described slider body slides in corresponding described prong, and described slider body is provided with block pin attachment hole; Slider pin, through the described slider pin attachment hole on described block pin attachment hole and described piston rod, is connected described slider body with described piston rod; Clutch type manual-operating mechanism, comprises worm gear, eccentric bushing, worm screw, worm shaft and handwheel; Described worm gear is connected with described rotating shaft, and described eccentric bushing is arranged at the inside of described casing, and is in the below of described worm gear, and described worm screw is arranged at the inside of described eccentric bushing, and described worm screw is connected with described worm shaft, and described worm shaft is connected with described handwheel.
Preferably, the horizontally loaded type Pneumatic piston actuator of described angular stroke control valve, also comprise position indicating device, described position indicating device comprises valve position instruction cabin, angle direction board and pointer, described valve position instruction cabin is connected with described casing, described angle direction board is arranged at the inside in described valve position instruction cabin, and described pointer is connected with described worm gear, and is in the inside in described valve position instruction cabin.
Preferably, described clutch type manual-operating mechanism also comprises locating stud; Described eccentric bushing is respectively equipped with the manual positioning hole and automatic positioning hole of inserting for described locating stud.
Preferably, described eccentric bushing is also provided with handle.
Preferably, the angle between the medial axis of described worm shaft and the medial axis of described piston rod is 25 °-30 °.
Preferably, described worm gear is fan-shaped, and described worm gear is identical with the modulus of described worm screw, and the opposite side of described worm gear is connected with described rotating shaft.
Preferably, described first cylinder comprises the first cylinder body, the first guide cover and the first end cap, the two ends of described first cylinder body respectively with the left Flange joint of the first end cap and described casing, described first guide cover is arranged on described first cylinder body, and described first guide cover is connected with described casing; Described second cylinder comprises the second cylinder body, the second guide cover and the second end cap, the two ends of described second cylinder body respectively with the right Flange joint of the second end cap and described casing, described second guide cover is arranged on described second cylinder body, and described second guide cover is connected with described casing; Described piston rod is successively through described first guide cover, described casing and described second guide cover.
Further, when the horizontally loaded type Pneumatic piston actuator employing double acting structure of described angular stroke control valve, the left flange of described first end cap, described casing, the right flange of described casing and described second end cap are respectively equipped with the first operation gas source interface, the second operation gas source interface, the 3rd operation gas source interface and the 4th operation gas source interface.
Further, when the horizontally loaded type Pneumatic piston actuator employing single-acting structure of described angular stroke control valve, described first cylinder also comprises the first spring part being arranged at described first cylinder interior, described first spring part is between described first guide cover and described first piston body, and described first spring part is enclosed within described piston rod; Described second cylinder also comprises the second spring members being arranged at described second cylinder interior, and described second spring members is between described second piston only and described second end cap.
Further, penetrating of described piston rod is provided with internal thread in one end of described first cylinder interior; Described first cylinder also comprises the stage clip bolt being arranged at described first cylinder interior, and described stage clip bolt through described first piston body, and penetrates in the internal thread of described piston rod, is connected by described first piston body with described piston rod; Described second end cap is provided with stop collar, and described stop collar is in the inside of described second cylinder body, and one end away from described second end cap of described stop collar is provided with spacing bayonet socket; Described second spring members comprises the second spring seat, the second spring body and position-limited lever, and the two ends of described second spring body are connected with described second spring seat and described second end cap respectively; One end of described position-limited lever is connected with described second spring seat, the other end of described position-limited lever penetrates in described stop collar, the other end of described position-limited lever is provided with step, the size of described step is greater than the size of described spacing bayonet socket, and described position-limited lever and described stop collar are all in described second spring body.
As mentioned above, the horizontally loaded type Pneumatic piston actuator of angular stroke control valve of the present invention, has following beneficial effect:
When the present invention uses, when the present invention is set to " automatically ", rotating eccentric sleeve, worm gear is separated with worm screw, to the first cylinder and the second cylinder input gas pressure, first piston body and the second piston only is driven to move, first piston body and the second piston only promote piston rod and move, piston rod drives slider body to move, slider body slippage in the prong of shift fork, slider body drives shift fork to rotate, and rotating shaft is rotated along with shift fork, rotating shaft band ovable valve stem moves, and realizes fluid on-off and regulable control to flowing through modulating valve; When the present invention is set to " manually ", rupturing operation air pressure, rotating eccentric sleeve, makes worm gear and worm meshing, operation handwheel, and rotary worm drives worm gear to move, rotating shaft band ovable valve stem moved, realizes fluid on-off and regulable control that Non-follow control flows through valve.The present invention is also provided with position indicating device, in axis of rotation process, by the aperture of position indicating device observable modulating valve.Piston actuator, clutch type manual-operating mechanism and position indicating device set are integrated by the present invention, and compact structure is easy to operate, improve the precision that complete machine controls.
Mechanism of the present invention adopts double acting structure, and when mechanism being set to " automatically ", rotating eccentric sleeve, worm gear is separated with worm screw, to the first cylinder and the second cylinder input gas pressure, first piston body and the second piston only is driven to move, drive piston rod moves, piston rod drives slider body to move, slider body slides in shift fork, slider body drives shift fork to rotate, make rotating shaft along with rotation, valve rod in rotating shaft drive valve assembly is together with valve core rotation, realize controlling the fluid on-off flowing through modulating valve when distribution magnet valve, when configuring double acting positioner, regulable control is carried out to flow, when input gas pressure switches, piston rod is movement oppositely.
During mechanism's employing single-acting structure of the present invention, and when mechanism being set to " automatically ", gas pressure inputs the first cylinder and the second cylinder, first piston body and the second piston only move, compress the first spring part and the second spring members, coupled piston bar, slide block, shift fork, rotating shaft, valve rod and spool; When input gas pressure reduces, by the first spring part and the second spring members reposition force respective change displacement, realizing controlling the fluid on-off flowing through modulating valve when distribution magnet valve, when configuring single-acting positioner, regulable control being carried out to flow.
When the present invention will switch to " manually ", cut off gas pressure, rotating eccentric sleeve, insert locating stud, make worm gear and worm meshing, operation handwheel, rotary worm, worm screw drives worm gear to rotate, and makes rotating shaft band ovable valve stem together with valve core rotation, realizes fluid on-off and regulable control that Non-follow control flows through valve.
The present invention is also provided with position indicating device, in axis of rotation process, by the aperture of position indicating device observable modulating valve.Pneumatic piston actuator, clutch type manual-operating mechanism and position indicating device set are integrated by the present invention.
Accompanying drawing explanation
Fig. 1 be shown as angular stroke control valve of the present invention horizontally loaded type Pneumatic piston actuator adopt double acting structure time face structural representation.
Fig. 2 is shown as the side-looking structural representation during horizontally loaded type Pneumatic piston actuator employing double acting structure of angular stroke control valve of the present invention.
Fig. 3 be shown as angular stroke control valve of the present invention horizontally loaded type Pneumatic piston actuator adopt single-acting structure time face structural representation.
Fig. 4 is shown as the side-looking structural representation during horizontally loaded type Pneumatic piston actuator employing single-acting structure of angular stroke control valve of the present invention.
Drawing reference numeral explanation
100 casings
110 second operation gas source interfaces
120 the 3rd operation gas source interfaces
200 first cylinders
210 first piston bodies
220 first cylinder bodies
230 first guide covers
240 first end caps
241 first operation gas source interfaces
250 first spring parts
260 stage clip bolts
300 second cylinders
310 second piston onlies
320 second cylinder bodies
330 second guide covers
340 second end caps
341 the 4th operation gas source interfaces
342 stop collars
343 spacing bayonet sockets
350 second spring members
351 second spring seats
352 second spring body
353 position-limited levers
354 steps
400 piston rods
410 slider pin attachment holes
500 shift forks
510 first forks
520 second forks
610 slider body
620 slider pins
700 rotating shafts
800 clutch type manual-operating mechanisms
810 worm gears
820 eccentric bushings
821 manual positioning holes
822 handles
830 worm screws
831 worm shafts
840 handwheels
850 locating studs
900 position indicating devices
910 valve position instruction cabins
920 angle direction boards
930 pointers
Angle between the medial axis of α worm shaft and the medial axis of piston rod
Embodiment
By particular specific embodiment, embodiments of the present invention are described below, person skilled in the art scholar the content disclosed by this specification can understand other advantages of the present invention and effect easily.
Refer to accompanying drawing.Notice, structure, ratio, size etc. that this specification institute accompanying drawings illustrates, content all only in order to coordinate specification to disclose, understand for person skilled in the art scholar and read, and be not used to limit the enforceable qualifications of the present invention, therefore the not technical essential meaning of tool, the adjustment of the modification of any structure, the change of proportionate relationship or size, do not affecting under effect that the present invention can produce and the object that can reach, still all should drop on disclosed technology contents and obtain in the scope that can contain.Simultaneously, quote in this specification as " on ", D score, "left", "right", " centre " and " one " etc. term, also only for ease of understanding of describing, and be not used to limit the enforceable scope of the present invention, the change of its relativeness or adjustment, under changing technology contents without essence, when being also considered as the enforceable category of the present invention.
Embodiment 1
As depicted in figs. 1 and 2, the horizontally loaded type Pneumatic piston actuator of the angular stroke control valve of the present embodiment, comprising: casing 100, first cylinder 200, second cylinder 300, piston rod 400, shift fork 500, two slider body 610, slider pin 620 and clutch type manual-operating mechanisms 800;
First cylinder 200 is connected with the second cylinder 300 by described casing 100; The inside of the first cylinder 200 and the second cylinder 300 is respectively equipped with first piston body 210 and the second piston only 310;
Piston rod 400, the two ends of piston rod 400 penetrate the inside in the first cylinder 200 and the second cylinder 300 respectively, the two ends of piston rod 400 are connected with first piston body 210 and the second piston only 310 respectively, piston rod 400 is provided with slider pin attachment hole 410, and the medial axis of slider pin attachment hole 410 is vertical with the medial axis of piston rod 400;
Shift fork 500, be arranged at the inside of casing 100, one end of the body of shift fork 500 is provided with the first fork 510 and the second fork 520, first fork 510 and the second fork 520 are oppositely arranged, first fork 510 and the second fork 520 are equipped with prong, and the other end of the body of shift fork 500 is connected with rotating shaft 700 key, and rotating shaft 700 is connected with valve rod by link, have gap between first fork 510 and the second fork 520, piston rod 400 passes from the gap between the first fork 510 and the second fork 520;
Two slider body 610 are embedded in the prong of corresponding first fork 510 and the prong of the second fork 520 respectively, the length of prong is greater than the length of slider body 610, slider body 610 slides in corresponding prong, and slider body 610 is provided with block pin attachment hole;
Slider pin 620, through the slider pin attachment hole 410 on block pin attachment hole and piston rod 400, is connected slider body 610 with piston rod 400;
Clutch type manual-operating mechanism 800 comprises worm gear 810, eccentric bushing 820, worm screw 830, worm shaft 831 and handwheel 840; Worm gear 810 is connected with rotating shaft 700 key, and eccentric bushing 820 is arranged at the inside of casing 100, and is in the below of worm gear 810, and worm screw 830 is arranged at the inside of eccentric bushing 820, and worm screw 830 adopts to sell with worm shaft 831 and is connected, and worm shaft 831 is connected with handwheel 840.
When the mechanism of the present embodiment uses, when mechanism transfers " automatically " to from " manually ", rotating eccentric sleeve 820, worm gear 810 is separated with worm screw 830, gas pressure is inputted to the first cylinder 200 and the second cylinder 300, first piston body 210 and the second piston only 310 is driven to move, first piston body 210 and the second piston only 310 promote piston rod 400 and move, piston rod 400 drives slider body 610 to move, slider body 610 slippage in shift fork 500, drive shift fork 500 to rotate simultaneously, rotating shaft 700 is rotated along with shift fork 500, rotating shaft 700 is with ovable valve stem to rotate, realize the control to the fluid on-off and flow that flow through modulating valve, when mechanism be set to " automatically " transfer " manually " to time, rupturing operation air pressure, rotating eccentric sleeve 820, worm gear 810 is engaged, operation handwheel 840, rotary worm 830 with worm screw 830, worm gear 810 is driven to move, worm gear 810 drives rotating shaft 700 to rotate, and makes rotating shaft 700 be with ovable valve stem, valve core rotation, realizes fluid on-off and regulable control that Non-follow control flows through modulating valve.
In the present embodiment, converting in the process of the corner-moving of shift fork 500 and rotating shaft 700 by piston rod 400 rectilinear movement, slider body 610 slides up and down in the prong of shift fork 500.
The horizontally loaded type Pneumatic piston actuator of angular stroke control valve also comprises position indicating device 900, position indicating device 900 comprises valve position instruction cabin 910, angle direction board 920 and pointer 930, valve position instruction cabin 910 is connected with casing 100, angle direction board 920 is arranged at the inside in valve position instruction cabin 910, pointer 930 is connected with worm gear 810, and is in the inside in valve position instruction cabin 910.Pointer 930 can rotate along with the rotation of worm gear 810, and because pointer 930 is in the inside in valve position instruction cabin 910, operator understand the aperture situation of valve by valve position direction board.
Clutch type manual-operating mechanism 800 also comprises locating stud 850; Eccentric bushing 820 is respectively equipped with the manual positioning hole 821 and automatic positioning hole of inserting for locating stud 850.When mechanism transfers " automatically " to from " manually ", locating stud 850 is inserted in automatic positioning hole, makes worm gear 810 and worm screw 830 be in disengaging configuration; When mechanism transfers " manually " to from " automatically ", locating stud 850 is inserted in manual positioning hole 821, and worm gear 810 is engaged with worm screw 830.Clutch type manual-operating mechanism 800 can independently assemble in rear direct loading casing 100, convenient for assembly and maintenance.
Eccentric bushing 820 is also provided with handle 822.Handle 822 is for switching eccentric bushing 820, and realization " manually " and " automatically " switch, and coordinate locating stud 850 to use, switching angle is 90 degree.
Angle α between the medial axis of worm shaft 831 and the medial axis of piston rod 400 is 25 °-30 °.This structure makes mechanism convenient operation, and handwheel 840 can not encounter the first cylinder 200, thus makes the volume of mechanism little, more compact structure.
Worm gear 810 is fan-shaped, and worm gear 810 is identical with the modulus of worm screw 830, and the opposite side of worm gear 810 is connected with rotating shaft 700 key.Being designed to fan-shaped is more compact structure in order to ensure to make mechanism under the prerequisite of angular stroke control valve maximum opening 90 degree.
The two ends of casing 100 are respectively equipped with left flange and right flange; First cylinder 200 comprises the first cylinder body 220, first guide cover 230 and the first end cap 240, the two ends of the first cylinder body 220 respectively with the left Flange joint of the first end cap 240 and casing 100, first guide cover 230 is arranged on the first cylinder body 220, and the first guide cover 230 is connected with casing 100; Second cylinder 300 comprises the second cylinder body 320, second guide cover 330 and the second end cap 340, the two ends of the second cylinder body 320 respectively with the right Flange joint of the second end cap 340 and casing 100, second guide cover 330 is arranged on the second cylinder body 320, and the second guide cover 330 is connected with casing 100; Piston rod 400 is successively through the first guide cover 230, casing 100 and the second guide cover 340.
When the horizontally loaded type Pneumatic piston actuator employing double acting structure of angular stroke control valve, the left flange of the first end cap 240, casing 100, the right flange of casing 100 and the second end cap 340 are respectively equipped with the first operation gas source interface 241, second and operate gas source interface 110, the 3rd operation gas source interface 120 and the 4th operation gas source interface 341.When inputting gas pressure in the first operation gas source interface 241 and the 3rd operation gas source interface 120, first piston body 210 and the second piston only 310 move right, piston rod 400 also just moves right, namely piston rod 400 forward moves, piston rod 400 promotes slider body 610, makes shift fork 500, rotating shaft 700 rotates; When inputting gas pressure in the second operation gas source interface 110 and the 4th operation gas source interface 341, first piston body 210 and the second piston only 310 are moved to the left, piston rod 400 is also just moved to the left, i.e. piston rod 400 oppositely movement, piston rod 400 promotes slider body 610, makes shift fork 500, rotating shaft 700 rotates.
Pneumatic piston actuator, clutch type manual-operating mechanism 800 and position indicating device 900 set are integrated by mechanism, and compact structure is easy to operate, improves the precision that complete machine controls.
Embodiment 2
As shown in Figure 3 and Figure 4, the difference of the present embodiment and embodiment is, when the horizontally loaded type Pneumatic piston actuator employing single-acting structure of angular stroke control valve, first cylinder 200 also comprises the first spring part 250 being arranged at the first cylinder body 220 inside, first spring part 250 is between the first guide cover 230 and the first end cap 240, first spring part 250 is enclosed within piston rod 400, and the first spring part 250 is connected with the first guide cover 230; Second cylinder 300 also comprises the second spring members 350, second spring members 350 being arranged at the second cylinder body 320 inside and is between the second piston only 310 and the second end cap 340.
When the Pneumatic piston actuator employing single-acting structure of angular stroke control valve, when needs piston rod 400 moves right, air pressure input first operation gas source interface 241 and the 3rd operation gas source interface 120, promotion first piston body 210 and the second piston only 310 move, compress the first spring part 250 and the second spring members 350, interlock piston rod 400, slider body 610, make shift fork 500, rotating shaft 700 rotate.Second operation gas source interface 110 (not shown) and the 4th operation gas source interface 341 are exhaust port, install rainhat.When needs piston rod 400 is moved to the left, only need switch emptying by the gas pressure in the first cylinder 200 and the second cylinder 300, the restoring force of the first spring part 250 and the second spring members 350 promotes piston rod 400 and is moved to the left.
Penetrating of piston rod 400 is provided with internal thread in one end of the first cylinder 200 inside; First cylinder 200 also comprises the stage clip bolt 260 being arranged at the first cylinder body 220 inside, and stage clip bolt 260 through first piston body 210, and penetrates in the internal thread of piston rod 400, is connected by first piston body 210 and compresses with piston rod 400; Second end cap 340 is provided with stop collar 342, and stop collar 342 is in the inside of the second cylinder body 320, and one end away from the second end cap 340 of stop collar 342 is provided with spacing bayonet socket 343; One end that second spring members 350 comprises the second spring seat 351, second spring body 352 and position-limited lever 353, second spring body 352 is welded with the second spring seat 351, and the other end of the second spring body 352 is connected with the second end cap 340; One end of position-limited lever 353 is connected with the second spring seat 351, the other end of position-limited lever 353 penetrates in stop collar 342, the other end of position-limited lever 353 is provided with step 354, the size of step 354 is greater than the size of spacing bayonet socket 343, and position-limited lever 353 and stop collar 342 are all in the second spring body 352.This structure makes the first spring part 250 of the first cylinder 200 inside be compressed to length of installation from free state by stage clip bolt 260, can guarantee assembling and maintenance safety.In the second cylinder 300, the step 354 of position-limited lever 353 blocks by the spacing bayonet socket 343 of stop collar 342, make position-limited lever 353 cannot depart from stop collar 342, now the second spring body 352 is in the compressive state of being slightly longer than installation dimension, makes easy to assembly, maintenance safety.
The present invention can control to switch to manually-operable when breaking down in actuator automatically, and switch to again automatic control after Failure elimination, can also supervise the open position of angular stroke control valve, light structure, manually-operable is light, and precision is high.
To sum up, the present invention effectively overcomes various shortcoming of the prior art and tool high industrial utilization.
Above-described embodiment is illustrative principle of the present invention and effect thereof only, but not for limiting the present invention.Any person skilled in the art scholar all without prejudice under spirit of the present invention and category, can modify above-described embodiment or changes.Therefore, such as have in art usually know the knowledgeable do not depart from complete under disclosed spirit and technological thought all equivalence modify or change, must be contained by claim of the present invention.
Claims (10)
1. a horizontally loaded type Pneumatic piston actuator for angular stroke control valve, is characterized in that, comprising:
Casing (100);
First cylinder (200), the second cylinder (300), described first cylinder (200) is connected with described second cylinder (300) by described casing (100); The inside of described first cylinder (200) and described second cylinder (300) is respectively equipped with first piston body (210) and the second piston only (310);
Piston rod (400), the two ends of described piston rod (400) penetrate the inside in described first cylinder (200) and described second cylinder (300) respectively, the two ends of described piston rod (400) are connected with described first piston body (210) and described second piston only (310) respectively, described piston rod (400) is provided with slider pin attachment hole (410), and the medial axis of described slider pin attachment hole (410) is vertical with the medial axis of described piston rod (400);
Shift fork (500), be arranged at the inside of described casing (100), one end of the body of described shift fork (500) is provided with the first fork (510) and the second fork (520) that are oppositely arranged, described first fork (510) and described second fork (520) are equipped with prong, the other end connection rotating shaft (700) of the body of described shift fork (500), described piston rod (400) passes from the gap between described first fork (510) and described second fork (520);
Two slider body (610), be embedded in accordingly in the prong of described first fork (510) and the prong of described second fork (520) respectively, the length of described prong is greater than the length of described slider body (610), described slider body (610) slides in corresponding described prong, and described slider body (610) is provided with block pin attachment hole;
Slider pin (620), through the described slider pin attachment hole (410) on described block pin attachment hole and described piston rod (400), described slider body (610) is connected with described piston rod (400);
Clutch type manual-operating mechanism (800), comprises worm gear (810), eccentric bushing (820), worm screw (830), worm shaft (831) and handwheel (840); Described worm gear (810) is connected with described rotating shaft (700), described eccentric bushing (820) is arranged at the inside of described casing (100), and be in the below of described worm gear (810), described worm screw (830) is arranged at the inside of described eccentric bushing (820), described worm screw (830) is connected with described worm shaft (831), and described worm shaft (831) is connected with described handwheel (840).
2. the horizontally loaded type Pneumatic piston actuator of angular stroke control valve according to claim 1, it is characterized in that: also comprise position indicating device (900), described position indicating device (900) comprises valve position instruction cabin (910), angle direction board (920) and pointer (930), described valve position instruction cabin (910) is connected with described casing (100), described angle direction board (920) is arranged at the inside of described valve position instruction cabin (910), described pointer (930) is connected with described worm gear (810), and be in the inside of described valve position instruction cabin (910).
3. the horizontally loaded type Pneumatic piston actuator of angular stroke control valve according to claim 1, is characterized in that: described clutch type manual-operating mechanism (800) also comprises locating stud (850); Described eccentric bushing (820) is respectively equipped with the manual positioning hole (821) and automatic positioning hole of inserting for described locating stud (850).
4. the horizontally loaded type Pneumatic piston actuator of angular stroke control valve according to claim 1, is characterized in that: described eccentric bushing (820) is also provided with handle (822).
5. the horizontally loaded type Pneumatic piston actuator of angular stroke control valve according to claim 1, is characterized in that: the angle between the medial axis of described worm shaft (831) and the medial axis of described piston rod (400) is 25 °-30 °.
6. the horizontally loaded type Pneumatic piston actuator of angular stroke control valve according to claim 1, it is characterized in that: described worm gear (810) is for fan-shaped, described worm gear (810) is identical with the modulus of described worm screw (830), and the opposite side of described worm gear (810) is connected with described rotating shaft (700).
7. the horizontally loaded type Pneumatic piston actuator of angular stroke control valve according to claim 1, is characterized in that:
Described first cylinder (200) comprises the first cylinder body (220), the first guide cover (230) and the first end cap (240), the two ends of described first cylinder body (220) respectively with the left Flange joint of described first end cap (240) and described casing (100), described first guide cover (230) is arranged on described first cylinder body (220), and described first guide cover (230) is connected with described casing (100);
Described second cylinder (300) comprises the second cylinder body (320), the second guide cover (330) and the second end cap (340), the two ends of described second cylinder body (320) respectively with the right Flange joint of the second end cap (340) and described casing (100), described second guide cover (330) is arranged on described second cylinder body (320), and described second guide cover (330) is connected with described casing (100);
Described piston rod (400) is successively through described first guide cover (230), described casing (100) and described second guide cover (330).
8. the horizontally loaded type Pneumatic piston actuator of angular stroke control valve according to claim 7, is characterized in that:
When the horizontally loaded type Pneumatic piston actuator employing double acting structure of described angular stroke control valve, the right flange of described first end cap (240), the left flange of described casing (100), described casing (100) and described second end cap (340) are respectively equipped with the first operation gas source interface (241), the second operation gas source interface (110), the 3rd operation gas source interface (120) and the 4th operation gas source interface (341).
9. the horizontally loaded type Pneumatic piston actuator of angular stroke control valve according to claim 7, is characterized in that:
When the horizontally loaded type Pneumatic piston actuator employing single-acting structure of described angular stroke control valve, described first cylinder (200) also comprises the first spring part (250) being arranged at described first cylinder body (220) inside, described first spring part (250) is between described first guide cover (230) and described first piston body (210), and described first spring part (250) is enclosed within described piston rod (400); Described second cylinder (300) also comprises the second spring members (350) being arranged at described second cylinder body (320) inside, and described second spring members (350) is between described second piston only (310) and described second end cap (340).
10. the horizontally loaded type Pneumatic piston actuator of angular stroke control valve according to claim 9, is characterized in that:
One end penetrated in described first cylinder (200) is inner of described piston rod (400) is provided with internal thread;
Described first cylinder (200) also comprises the stage clip bolt (260) being arranged at described first cylinder body (220) inside, described stage clip bolt (260) is through described first piston body (210), and penetrate in the internal thread of described piston rod (400), described first piston body (210) is connected with described piston rod (400);
Described second end cap (340) is provided with stop collar (342), described stop collar (342) is in the inside of described second cylinder body (320), and one end away from described second end cap (340) of described stop collar (342) is provided with spacing bayonet socket (343);
Described second spring members (350) comprises the second spring seat (351), the second spring body (352) and position-limited lever (353),
The two ends of described second spring body (352) are connected with described second spring seat (351) and described second end cap (340) respectively;
One end of described position-limited lever (353) is connected with described second spring seat (351), the other end of described position-limited lever (353) penetrates in described stop collar (342), the other end of described position-limited lever (353) is provided with step (354), the size of described step (354) is greater than the size of described spacing bayonet socket (343), and described position-limited lever (353) and described stop collar (342) are all in described second spring body (352).
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