CN104895867A - Self-return cylinder - Google Patents
Self-return cylinder Download PDFInfo
- Publication number
- CN104895867A CN104895867A CN201410081495.5A CN201410081495A CN104895867A CN 104895867 A CN104895867 A CN 104895867A CN 201410081495 A CN201410081495 A CN 201410081495A CN 104895867 A CN104895867 A CN 104895867A
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- Prior art keywords
- cylinder
- self
- spring
- rod
- piston
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The invention discloses a self-return cylinder. The self-return cylinder comprises a double-outlet-rod cylinder, wherein a spring return mechanism is arranged at one rod outlet side of the double-outlet-rod cylinder for returning a piston of the cylinder to an original position when the piston is not suffered from gas pressure. Meanwhile, the self-return cylinder is additionally provided with a travel adjusting mechanism for solving the problems of incapability of automatic return of the cylinder and incapability of adjusting the travel in the prior art. Therefore, the self-return cylinder, disclosed by the invention, is compact in structure, great in output acting force, adjustable in output travel and suitable for various valves, can drive the valves with different travels, and reduces the types of cylinders. Therefore, the system investment is reduced, and the application range of the cylinders is widened.
Description
Technical field
The present invention relates to the application of gas actuating device, particularly Self-resetting cylinder.
Background technique
Cylinder is the important composition mechanism in pneumatic actuator system and control system.Be widely used in industrial production and the manufacture fields such as petrochemical industry, Coal Chemical Industry, metallurgy, electric power.In pneumatic actuator system, cylinder also can be used for controlling the open and close of the valves such as modulating valve, throttle valve, plunger valve.Generally traditional straight journey cylinder when designing, using the stroke that the valve rod lifting height of valve exports as cylinder, once just become a fixing parameter after the stroke of cylinder is determined.Traditional straight journey cylinder, due to for determining stroke mechanism, therefore can only export unique fixing stroke, the versatility of this type of cylinder is poor, and the valve be suitable for is narrower, can not meet the usage requirement of some Special valves.Simultaneously, for requiring in the special dimensions such as Coal Chemical Industry that valve closing is at appointment open position, such as: the modulating valve of straight journey requires that the keying position of valve is positioned at 10% place of valve rod total travel, simultaneously, along with the change of Coal Chemical Industry technological requirement, the keying position of same modulating valve also will change, and generally traditional cylinder cannot meet this requirement.
It can thus be appreciated that, realizing in process of the present invention, inventor finds to there is following shortcoming in prior art: because straight journey cylinder stroke after dispatching from the factory is fixed in prior art, thus make the execution distance of cylinder fixing, thus the requirement that can not satisfy the demand stroke and command range need adjust, reduce the applicability of cylinder, improve the purchase cost of cylinder.
Summary of the invention
For defect of the prior art, for solving above-mentioned existing cylinder Problems existing, the present invention proposes a kind of Self-resetting cylinder.
The present invention proposes Self-resetting cylinder, comprising: two rod cylinder, wherein, spring return mechanism is set described pair of rod cylinder one rod side, makes cylinder piston when not bearing gas pressure, turning back to initial position.
In one embodiment, also comprise: position-limit mechanism, described position-limit mechanism, be arranged at the end of a described rod.
In one embodiment, described spring return mechanism is arranged between described position-limit mechanism and cylinder body.
In one embodiment, described spring return mechanism arranges the piston cavity be arranged in residing for a described rod, is arranged between side piston and inboard wall of cylinder block.
In one embodiment, also comprise: sealing cylinder, described seal cylinder sleeve is loaded on outside described spring return mechanism, the internal diameter of described sealing cylinder is corresponding to the spring cylinder piston external diameter of described spring return mechanism, described spring cylinder outside piston is fitted with the sealing inside wall of cylinder, and the side of described sealing cylinder is fixedly connected with described pair of rod cylinder.
In one embodiment, the spring of described spring return mechanism is two pocketed springs.
In one embodiment, described spring cylinder piston offers balance through hole.
In one embodiment, described balance through hole distributes along described spring cylinder piston radial even circumferential.
In one embodiment, in the piston hole of described pair of rod cylinder and described sealing cylinder, also sliding bearing is set.
In one embodiment, also comprise: damping ring, described damping ring is fixed on outside the piston hole of described pair of rod cylinder inner cavity.
In one embodiment, the upper side of described cylinder upper end cap comprises corresponding circular groove to the downside of spring cylinder cap, described circular groove is corresponding to the external diameter of described sealing cylinder, the two ends of described sealing cylinder are made to be assemblied in the circular groove of the upper side of described cylinder upper end cap, and in the downside circular groove of described spring cylinder cap.
It can thus be appreciated that compared with prior art, Self-resetting cylinder of the present invention has the following advantages: compact structure, output action power is large and delivery stroke is adjustable, is applicable to multiple valve, can drives the valve of different stroke, reduces the kind of cylinder.Therefore, the system that reduces drops into, and expands the using scope of cylinder.
Accompanying drawing explanation
Fig. 1 is the structural representation of Self-resetting cylinder in one embodiment of the present invention;
Fig. 2 is the structural representation of Self-resetting cylinder in another embodiment of the present invention;
Fig. 3 is the structural representation of the Self-resetting cylinder in one embodiment of the present invention with range-adjustable function;
Fig. 4 is the structural representation of the Self-resetting cylinder in another embodiment of the present invention with range-adjustable function;
Fig. 5 is the structural representation of the Self-resetting cylinder in one embodiment of the present invention with dual reset spring;
Fig. 6 is the balance through hole schematic diagram of one embodiment of the present invention medi-spring cylinder piston;
Fig. 7 is in one embodiment of the present invention, has the schematic diagram of damping structure in cylinder body.
Reference numerals list is as follows:
K1. pore; 2. cylinder lower end cap; 3. cylinder body; 4. cylinder piston; 5. cylinder upper end cap; K2. pore; 6. Cock screw; 7. spring cylinder piston; 8. spring cylinder piston rod; 9. Returnning spring; 10. seal cylinder; 11. spring cylinder caps; 12. protective covers; 13. adjusting nuts; C2. annular groove; 14. sliding bearings; 15. guidance tapes; C1. annular groove; 16. sliding bearings; 17. coupling sleeves; 18. sliding bearings; K3 balances through hole; 20. pairs of rod cylinders; 21. controlling rods; 22. perform bar; 23. damping rings; 30. spring return mechanism; 31. clamping boss; Pocketed springs in 91..
Embodiment
Below in conjunction with accompanying drawing, invention is described in further detail.
As the structural representation that Fig. 1 is Self-resetting cylinder in an embodiment of the present invention, the structure of Self-resetting cylinder of the present invention is, arranges spring return mechanism 30 in the end of the controlling rod 21 of two rod cylinder 20.In spring return mechanism 30, the end of controlling rod 21 is fixedly connected with spring cylinder piston rod 8 (namely lengthening the end of controlling rod 21) by screw thread, for ensureing its steadiness connected, using positioning screwn 6 to fix from side (radial direction) upon connection, thus avoiding loosening.At one end of spring cylinder piston rod 8 assembling spring cylinder cap 11, spring cylinder piston rod 8 one end (boss is on spring cylinder piston rod 8) cylindrical arranges clamping boss 31, spring cylinder piston 7 is installed on this clamping boss 31.Wherein, spring cylinder piston rod 8 and the end of controlling rod 21 can be the illustrated form that is threaded, and integration processing also can be adopted to realize.Returnning spring 9 is assemblied between spring cylinder piston 7 and spring cylinder cap 11, and the two ends of Returnning spring 9 offset with spring cylinder piston 7 and spring cylinder cap 11 respectively.Above-mentioned Returnning spring 9 can select cylindrically coiled spring or conical helical spring.For making the playback of Returnning spring 9 more accurate, sensitive, its Returnning spring 9, when being assemblied between spring cylinder piston 7 and spring cylinder cap 11, should have certain initial deformation amount, ensures the accurate playback of cylinder piston 4.Therefore, when the air inlet of K1 pore, promote cylinder piston 4 and move to A direction, drive controlling rod 21 and spring cylinder piston rod 8 to move up, Returnning spring 9 produces compression.When K1 pore stops air inlet, cylinder piston 4, under the promotion of Returnning spring 9, drives controlling rod 21 and spring cylinder piston rod 8 to move down, turns back to initial position.
For when movement travel is less, make the reset of controlling rod 21 more sensitive, as shown in Figure 2, in one embodiment of the invention, spring return mechanism 30 is arranged in the cavity of controlling rod 21 one end, and the lower end surface of the two ends of Returnning spring 9 and the upper-end surface of cylinder piston 4 and cylinder upper end cap 5 offsets.When the air inlet of K1 pore, promote cylinder piston 4 and move to A direction, directly compression is produced to Returnning spring 9, has saved transmission distance.When K1 pore stops air inlet, cylinder piston 4, under the promotion of Returnning spring 9 stretching force, turns back to initial position.Thus achieve the parking position accuracy of little stroke, and save the body volume of cylinder.
For ease of regulating the stroke of above-mentioned pair of rod cylinder 20, as shown in Figure 3,4, in one embodiment of the invention.Outside thread is offered in the end (i.e. the end of spring cylinder piston rod 8) of the controlling rod 21 of two rod cylinder 20, and on this outside thread, assemble the stop nut 13 matched, described stop nut can be moved axially along externally threaded, namely form screw thread position-limit mechanism in the end of controlling rod 21.The other end of controlling rod 21 assembles with the cylinder piston 4 of two rod cylinder 20 is fixing, this cylinder piston 4 assembles with one end of the execution bar 22 of two rod cylinder 20 is fixing simultaneously, when practical application, controlling rod 21 can integrally be processed with execution bar 22, assemble with the center hole entirety of cylinder piston 4, for ease of processing, controlling rod 21 assembles with performing to fix with cylinder piston 4 after bar 22 also can be processed separately.Bilateral air inlet/outlet K1, K2 of its pair of rod cylinder 20, be opened on cylinder lower end cap 2 and cylinder upper end cap 5, and be fixedly connected with the two ends of cylinder body 3, the aperture of its bilateral air inlet/outlet K1, K2 can be preferably & 3 or & 5mm.The cylinder block material of above-mentioned pair of rod cylinder 20 can be preferably the material such as Ordinary Steel or stainless steel.Wherein, diameter of cylinder can be chosen for & 50 ~ & 200mm.
As shown in Figure 3,4, when needing to regulate the initial position or overall stroke that perform bar 22, regulate stop nut 13, controlling rod 21 is moved to side, and cylinder piston 4 is in the inner chamber of two rod cylinder 20 moves.As, cylinder diameter 50mm, total kilometres 180mm, when need be 150mm by stroke adjustment, on controlling rod 21, rotary spacing nut 13 makes controlling rod 21 30mm(that moves up make total kilometres be adjusted to 150mm), synchronously make cylinder piston 4 mobile 30mm in the inner chamber of two rod cylinder 20, reach object cylinder stroke being given to adjustment.
In order to increase the reset deformation force of spring further, as shown in Figure 5, in one embodiment of this invention, inner at Returnning spring 9, be also provided with interior pocketed springs 91, make the present invention can be applicable to the occasion requiring ouput force larger.
As shown in Figure 3, for make the spring reset deformation force of Returnning spring 9 more stable put on spring cylinder piston 7, pocketed springs cylinder body (consistent with the part name in description of reference numerals) 10 is gone back in the outside of spring cylinder piston 7, be inserted in the upper-end surface annular groove C1 of the cylinder upper end cap 5 of two rod cylinder 20 on the downside of sealing cylinder 10, upside loads in the annular groove C2 of spring cylinder cap 11 lower end surface, by stud and nut, sealing cylinder 10 and spring cylinder cap 11 are fixed on the annular groove C1 of cylinder upper end cap 5 upper-end surface, thus form more stable being fixedly connected with two rod cylinder 20.The internal diameter of sealing cylinder 10 is corresponding to spring cylinder piston 7 external diameter, and spring cylinder piston 7 cylindrical is fitted with sealing cylinder 10 inwall.For making the slip of spring cylinder piston 7 in sealing cylinder 10 more steady, at the external cylindrical surface of spring cylinder piston 7 built with guidance tape 15.
The adjustable side of spring cylinder piston rod 8 is provided with outside thread and stretches out from spring cylinder cap 11, is threaded with adjusting nut 13, and adjusting nut 13 is against on the step of spring cylinder cap 11 upper-end surface.Spring cylinder cap 11 center hole is built with sliding bearing 14, and spring cylinder piston rod 8 is positioned at sliding bearing 14.
In present embodiment, the working procedure of cylinder is: when from the pore K1 air inlet of cylinder lower end cap 2, bleed pressure promotes cylinder piston 4 and drives execution bar 22, coupling sleeve 17, spring cylinder piston rod 8, spring cylinder piston 7 to move up together with adjusting nut 13, spring cylinder piston 7 Compress Spring 9, now, be vented from the pore K2 of cylinder upper end cap 5, until cylinder piston 4 offsets with the lower end surface of cylinder upper end cap 5.When the pore K1 of cylinder lower end cap 2 is vented, spring 9 by compression promotes spring cylinder piston 7 and spring cylinder piston rod 8 moves down, adjusting nut 13, execution bar 22, coupling sleeve 17 is driven to move down together with cylinder piston 4, until adjusting nut 13 offsets with the upper-end surface of spring cylinder cylinder cap 11.In order to increase ouput force and the speed of action of cylinder, meanwhile, also can make the pore K2 air inlet of cylinder upper end cap 5, bleed pressure promotes cylinder piston 4 and moves down, and drives and perform bar 22 and move down together with spring cylinder piston rod 8.Perform moving up and down to drive and being attached thereto the valve piston bar connect and doing reciprocating linear action of bar 22, realize the opening and closing of valve.The delivery stroke of this cylinder has regulatory function: can adjust spring cylinder piston rod 8 and the upper-lower position of spring cylinder piston 7 in sealing cylinder 10 by adjusting nut 13, by being threaded between spring cylinder piston rod 8 and execution bar 22, synchronous adjustment performs bar 22 and the upper-lower position of cylinder piston 4 in cylinder body 3.At the end of the pore K1 exhaust of cylinder lower end cap 2, the distance h between cylinder piston 4 upper-end surface and cylinder upper end cap 5 is the stroke of cylinder.In addition, adjusting nut 13 can also be adjusted at any time, make execution bar 22 stretch out different length, make the stroke h of cylinder realize the real-time adjustment of cylinder stroke by adjustment adjusting nut 13.
For avoiding the misoperation to adjusting nut 13, spring cylinder cap 11 upper-end surface boss is provided with protective cover 12, and protective cover 12 is fixed on spring cylinder cap 11 by screw.Be arranged on coupling sleeve 17 two ends in the center hole of cylinder upper end cap 5 to offset with the cylinder piston 4 in cylinder body 3 and spring cylinder piston rod 8 end seal in cylinder 10 respectively, execution bar 22 and cylinder piston 4, coupling sleeve 17, spring cylinder piston rod 8, adjusting nut 13 become be integrated also synchronously to do reciprocating linear action.
For making spring cylinder piston 7 operationally more steady, in one embodiment of the invention, one or more balance through hole K3 is provided with at spring cylinder piston 7, upper and lower two cavitys of communication seals cylinder 10 inner spring cylinder piston 7, the aperture of this balance through hole K3 and quantity, can set according to cylinder diameter size, thus ensure that piston is when moving up and down, in some chambeies, do not assemble a certain amount of air pressure instantaneously, make the movement of piston unaffected.
For making spring cylinder piston 7 each side uniform force, as shown in Figure 6, in one embodiment of the invention, balance through hole K3 to be uniformly distributed along spring cylinder piston 7 radial circumference.Concrete quantity can be preferably 6,8 or 10.(being illustrated as the situation in 8 holes)
For reduce cylinder piston 4 operationally with the shock of two rod cylinder 20 inner chamber, as shown in Figure 7, in one embodiment of the invention, in cylinder lower end cap 2 central hole of two rod cylinder 20 inner chamber, damping ring 23 is set, reduce the impact of cylinder piston 4 pairs of cylinder lower end caps 2, reduce noise when cylinder runs.
Above-described is only some embodiments of the present invention.For the person of ordinary skill of the art, without departing from the concept of the premise of the invention, can also make some distortion and improvement, these all belong to the protection domain of invention.
Claims (11)
1. Self-resetting cylinder, comprising: two rod cylinder (20), is characterized in that, arranges spring return mechanism (30) in described pair of rod cylinder (20) rod side, making cylinder piston (4) when not bearing gas pressure, turning back to initial position.
2. Self-resetting cylinder according to claim 1, is characterized in that, also comprise: position-limit mechanism, described position-limit mechanism, is arranged at the end of a described rod.
3. Self-resetting cylinder according to claim 2, is characterized in that, described spring return mechanism (30) is arranged between described position-limit mechanism and cylinder body (3).
4. Self-resetting cylinder according to claim 1, is characterized in that, described spring return mechanism (30) arranges the piston cavity be arranged in residing for a described rod, is arranged between side piston and cylinder body (3) inwall.
5. Self-resetting cylinder according to claim 3, it is characterized in that, also comprise: sealing cylinder (10), described sealing cylinder (10) is set in described spring return mechanism (30) outside, the internal diameter of described sealing cylinder (10) is corresponding to spring cylinder piston (7) external diameter of described spring return mechanism (30), described spring cylinder piston (7) cylindrical is fitted with sealing cylinder (10) inwall, and the side of described sealing cylinder (10) is fixedly connected with described pair of rod cylinder (20).
6. Self-resetting cylinder according to claim 3, is characterized in that, the spring of described spring return mechanism (30) is two pocketed springs.
7. Self-resetting cylinder according to claim 5, is characterized in that, described spring cylinder piston (7) is offered balance through hole (K3).
8. Self-resetting cylinder according to claim 7, is characterized in that, described balance through hole (K3) is uniformly distributed along described spring cylinder piston (7) radial circumference.
9. Self-resetting cylinder according to claim 1, is characterized in that, also arranges sliding bearing (16) in the piston hole of described pair of rod cylinder (20) and described sealing cylinder (10).
10. Self-resetting cylinder according to claim 1, is characterized in that, also comprise: damping ring (23), and described damping ring (23) is fixed on outside the piston hole of described pair of rod cylinder (20) inner chamber.
11. Self-resetting cylinders according to claim 5, the upper side of described cylinder upper end cap (5) and the downside of spring cylinder cap (11) comprise corresponding circular groove (C1, C2), described circular groove (C1, C2) corresponding to the external diameter of described sealing cylinder (10), the two ends of described sealing cylinder (10) are assemblied in the circular groove of the upper side of described cylinder upper end cap (5) and the downside circular groove of described spring cylinder cap (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410081495.5A CN104895867B (en) | 2014-03-06 | 2014-03-06 | self-resetting cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410081495.5A CN104895867B (en) | 2014-03-06 | 2014-03-06 | self-resetting cylinder |
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| Publication Number | Publication Date |
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| CN104895867A true CN104895867A (en) | 2015-09-09 |
| CN104895867B CN104895867B (en) | 2018-01-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410081495.5A Active CN104895867B (en) | 2014-03-06 | 2014-03-06 | self-resetting cylinder |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105240596A (en) * | 2015-10-12 | 2016-01-13 | 罗普阀业（宜兴）有限公司 | Aluminum-alloy straight-stoke piston type pneumatic actuator |
| CN105665973A (en) * | 2016-03-10 | 2016-06-15 | 佛山华盾人防工程有限公司 | Quick and efficient pneumatic expander and civil defense ventilation embedded pipe using same |
| CN106975785A (en) * | 2017-05-01 | 2017-07-25 | 桐乡市百宝电子商务有限公司 | A kind of bar cutter device |
| CN108656024A (en) * | 2018-05-18 | 2018-10-16 | 武汉三江航天远方科技有限公司 | Spring cylinder spring and its assembly tooling and method |
| CN109322871A (en) * | 2018-11-30 | 2019-02-12 | 湖南协力液压有限公司 | A kind of hydraulic cylinder that can automatically reset |
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| JP2001141056A (en) * | 1999-11-08 | 2001-05-25 | Samsung Electro Mech Co Ltd | Driving cylinder |
| CN201241890Y (en) * | 2008-08-19 | 2009-05-20 | 孙光锋 | Single-acting multiplying-power air cylinder |
| CN201779090U (en) * | 2010-08-30 | 2011-03-30 | 杭州小森机械制造有限公司 | Cutting oil cylinder, steel bar cutting machine and steel bar straightening and cutting machine |
| CN203023166U (en) * | 2012-12-23 | 2013-06-26 | 湖南明鼎科技有限公司 | Cylinder for third rail current collector |
-
2014
- 2014-03-06 CN CN201410081495.5A patent/CN104895867B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001141056A (en) * | 1999-11-08 | 2001-05-25 | Samsung Electro Mech Co Ltd | Driving cylinder |
| CN201241890Y (en) * | 2008-08-19 | 2009-05-20 | 孙光锋 | Single-acting multiplying-power air cylinder |
| CN201779090U (en) * | 2010-08-30 | 2011-03-30 | 杭州小森机械制造有限公司 | Cutting oil cylinder, steel bar cutting machine and steel bar straightening and cutting machine |
| CN203023166U (en) * | 2012-12-23 | 2013-06-26 | 湖南明鼎科技有限公司 | Cylinder for third rail current collector |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105240596A (en) * | 2015-10-12 | 2016-01-13 | 罗普阀业（宜兴）有限公司 | Aluminum-alloy straight-stoke piston type pneumatic actuator |
| CN105665973A (en) * | 2016-03-10 | 2016-06-15 | 佛山华盾人防工程有限公司 | Quick and efficient pneumatic expander and civil defense ventilation embedded pipe using same |
| CN106975785A (en) * | 2017-05-01 | 2017-07-25 | 桐乡市百宝电子商务有限公司 | A kind of bar cutter device |
| CN108656024A (en) * | 2018-05-18 | 2018-10-16 | 武汉三江航天远方科技有限公司 | Spring cylinder spring and its assembly tooling and method |
| CN109322871A (en) * | 2018-11-30 | 2019-02-12 | 湖南协力液压有限公司 | A kind of hydraulic cylinder that can automatically reset |
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| Publication number | Publication date |
|---|---|
| CN104895867B (en) | 2018-01-05 |
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