CN103591366B - Stroke feedback ejector rod device of pneumatic actuator - Google Patents
Stroke feedback ejector rod device of pneumatic actuator Download PDFInfo
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- CN103591366B CN103591366B CN201310590078.9A CN201310590078A CN103591366B CN 103591366 B CN103591366 B CN 103591366B CN 201310590078 A CN201310590078 A CN 201310590078A CN 103591366 B CN103591366 B CN 103591366B
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- piston
- pneumatic actuator
- piston rod
- rod
- ejector rod
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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
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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
- F16K37/0025—Electrical or magnetic means
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Actuator (AREA)
Abstract
The present invention relates to a kind of stroke feedback ejector rod device of pneumatic actuator, it comprises induction contact, housing, piston, piston rod, bulb push rod and Compress Spring; Described enclosure interior is provided with inner chamber, and inner chamber is for placing Compress Spring and piston; Piston rod is arranged in piston, and induction contact is connected with piston rod is fastening; Described piston rod and housing are slidably matched, the lower end of described Compress Spring and piston contact, and the lower end of described piston rod is provided with bulb push rod.The present invention is that a kind of stroke puts signal feedback device all the time, relies on the active force of Returnning spring and cylinder piston to realize replying the function with feedback without the need to additional any power; Stroke feedback ejector rod device of pneumatic actuator volume is little, and structural principle is simple; Piston action is in bulb push rod, and rely on mechanical kinetic energy to realize signal feed back, signal is installed on the signal feed back form of cylinder type actuator inside compared with other, more safe and reliable; Stroke feedback ejector rod device of pneumatic actuator low cost of manufacture, it is convenient to install, non-maintaining.
Description
Technical field
The present invention relates to a kind of stroke feedback ejector rod device of pneumatic actuator, belong to pneumatic actuator and control attachment technique field.
Background technique
Pneumatic actuator has been widely used in social all trades and professions, particularly as the driver element of the Automated condtrol of the important industries such as smelting iron and steel, petrochemical industry, Coal Chemical Industry, generating.The performance of pneumatic actuator and profile directly affect control accuracy and the cost input of automatic system.
Control valve design and manufaction is the important component part of automation control system, carries the important mission of modern industrial technology innovation, particularly important in industries such as smelting iron and steel, petrochemical industry, natural gas, Coal Chemical Industries.The success or failure of Valve controlling directly affect the performance of whole system.The good valve of control performance can boost productivity and quality of product.In the process, cylinder type actuator applies as the drive unit of valve, a lot of irreplaceable advantage is had in valve selection and design process, it can be applied to comparatively complex working conditions, and coordinate the corresponding annex that controls can reach higher control performance, design, manufacture electronic and hydraulic actuator relative to operating cost all there is unapproachable advantage.Therefore, when valve selection and design, cylinder type actuator is the preferred model of instrumentation engineering teacher and valve design engineers.But the power used because of cylinder type actuator is pressurized air, its ouput force (moment) directly affecting by air compressing acc power, therefore cylinder type actuator accomplishes that as wanted large power (moment) output just must rely on increase cylinder room area to realize.So just, make cylinder type actuator often have larger volume, under the particular surroundings that some installing space is limited, we need the overall dimensions reducing valve as much as possible, but often because such design development can cause control, annex lacks installing space, cannot provide travel feedback accurately.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of stroke feedback ejector rod device of pneumatic actuator is provided, to overcome the deficiency that existing pneumatic actuator initial point and terminal cannot be determined, its light structure, installing space be little, be quick on the draw, safe and reliable and non-maintaining.
According to technological scheme provided by the invention, described stroke feedback ejector rod device of pneumatic actuator, comprises induction contact, housing, piston, piston rod, bulb push rod and Compress Spring; Described enclosure interior is provided with inner chamber, and inner chamber for placing Compress Spring and piston, and play the guiding role to piston; Piston rod is arranged in piston, and induction contact and piston rod utilize bolton to be connected, also tight by the first hexagon nut; Described piston rod and housing are slidably matched, the lower end of described Compress Spring and piston contact, and the lower end of described piston contacts with the step on piston rod, and the lower end of described piston rod is provided with bulb push rod, also tight by the second hexagon nut.
As a further improvement on the present invention, in the circular port that described housing coordinates with piston rod, be provided with the motive sealing of two O-ring seals for housing and piston rod.
As a further improvement on the present invention, described housing profile is provided with a four directions, and described cubic lower end arranges first step cutting pattern for installing the first O-ring seals, and described first step cutting pattern lower end is provided with the first outside thread, for being connected with cylinder.
As a further improvement on the present invention, the top of described inner chamber is provided with the first manhole, and the intermediate portion of the manhole of described inner chamber is provided with two circular grooves, for installing the second O-ring seals.
As a further improvement on the present invention, described piston is cylindrical, and the top of described inner chamber is provided with the first manhole, and described piston is provided with the uniform circular equalizing orifice of four annulars.
As a further improvement on the present invention, the two ends of described piston rod are respectively equipped with the second outside thread and the 3rd outside thread, for installing induction contact and bulb push rod; The side of described piston rod is provided with second step cutting pattern, for the location that piston moves downward.
As a further improvement on the present invention, the two ends of described Compress Spring are equipped with plane, fit respectively, can play the effect of Anti-inclining during installation with the inner chamber of housing and the side of piston.
As a further improvement on the present invention, one end of described bulb push rod is provided with the second internal thread, for being connected with piston rod; The other end of described bulb push rod is set to hemisphere.
As a further improvement on the present invention, described induction contact is the cylindrical contact of end band first internal thread, and induction contact provides to external chromacoder (position limit switch) feedback signal coming from pin-lift arrangement.
Advantage of the present invention is: the power that the pressure produced when described stroke feedback ejector rod device of pneumatic actuator have employed the piston action of cylinder ejects as piston rod, adopt the restoring force of Compress Spring as power during reply, without the need to additional any power source, economical, environment friendly and pollution-free, explosion-proof, installation footprint is less, has very strong adaptive capacity to environment.Described stroke feedback ejector rod device of pneumatic actuator can provide the signal feed back of cylinder type actuator range and minimum stroke, by with position limit switch indicate Presentation Function and long-range controlling functions with the use of long-range switch can be realized.Described pin-lift arrangement housing, piston, piston rod and bulb push rod make by stainless steel material, good rust inhibition can be played, thus the large working life extending stroke feedback ejector rod device of pneumatic actuator.Described piston utilizes four circular equalizing orifices to realize the pressure balance of piston both sides, thus greatly reduce the P1 of Compress Spring ... Pn ... the designing requirement of Pj value, the volume of Compress Spring can be reduced by the design of this equalizing orifice, thus reduce the physical dimension of whole stroke feedback ejector rod device of pneumatic actuator.
Accompanying drawing explanation
Fig. 1 is construction profile schematic diagram of the present invention.
Fig. 2 is structural profile view of the present invention.
Fig. 3 is shell construction cross section view of the present invention.
Fig. 4 is piston structure cross section view of the present invention.
Fig. 5 is piston rod construction schematic diagram of the present invention.
Fig. 6 is bulb push rod structure cross section view of the present invention.
Embodiment
Below in conjunction with concrete drawings and Examples, the invention will be further described.
As shown in FIG. 1 to 3: the present invention includes induction contact 1, one hexagon nut 2, housing 3, first O-ring seals 4, piston 5, piston rod 6, second hexagon nut 7, bulb push rod 8, Compress Spring 9, second O-ring seals 10, four directions 11, first step cutting pattern 12, first outside thread 13, inner chamber 14, first manhole 15, circular groove 16, second manhole 17, cylindrical 18, circular equalizing orifice 19, guiding 20, second step cutting pattern 21, second outside thread 22, chamfering 23, 3rd outside thread 24, plane 25, second internal thread 26, hemisphere 27, first internal thread 28.
Comprise induction contact 1, induction contact 1 has ability that is charged, magnetic conduction, to meet the installation conditions of induction switch.Described induction contact 1 utilizes bolton to be connected with piston rod 6, also tight by the first hexagon nut 2; Described piston rod 6 is slidably matched with housing 3, described housing 3 is provided with a round cavity 14, Compress Spring 9 is provided with in inner chamber 14, the lower end of described Compress Spring 9 contacts with piston 5, the lower end of described piston 5 contacts with the step on piston rod 6, the lower end of described piston rod 6 is provided with bulb push rod 8, also tight, locking by the second hexagon nut 7.Described housing 3 lower end is provided with the first O-ring seals 4, for pin-lift arrangement static seal; In the circular port that described housing 3 coordinates with piston rod 6, be provided with two O-ring seals for the motive sealing of housing 3 with piston rod 6.
Described housing 3 profile is provided with a four directions 11, and described cubic 11 lower ends arrange first step cutting pattern 12 for installing the first O-ring seals 4, and described first step cutting pattern 12 lower end is provided with the first outside thread 13, for being connected with cylinder; Described housing 3 inside is provided with inner chamber 14, for placing Compress Spring 9 and piston 5, and play the guiding role to piston 5; The top of described inner chamber 14 is provided with the first manhole 15, and the intermediate portion of described manhole 15 is provided with two circular grooves 16, for installing the second O-ring seals 10, plays sealing effect;
Described piston 5 is cylindrical 18, and the centre of described piston 5 is provided with second manhole 17, for installing piston rod 6; Described piston 5 is provided with the uniform circular equalizing orifice 19 of four annulars, when cylinder has pressurized air, can be made the pressure balance of the inside of pin-lift arrangement and the inside of cylinder actuating mechanism by this equalizing orifice.The area summation of described circular equalizing orifice 19, answers boundary between 1/5 to 1/3 of piston 5 area, must not exceed this scope.
The two ends of described piston rod 6 are respectively equipped with the second outside thread 22 and the 3rd outside thread 24, for installing induction contact 1 and bulb push rod 8; The side of described piston rod 6 is provided with second step cutting pattern 21, for the location that piston 5 moves downward; The intermediate portion of described piston rod 6 is guiding 20, is formed be slidably matched with the manhole of housing 3.The end of described guiding 20 is provided with chamfering 23, for the installation of the second O-ring seals 10.The surface requirements grinding of described guiding 20 reaches more than 0.8 grade roughness, and sliding injury when avoiding piston rod 6 action, causes the consequence that can not seal.
, for being provided with plane 25, fitting with the inner chamber 14 of housing 3 and the side of piston 5 respectively during installation, can play the effect of Anti-inclining in the two ends of described Compress Spring 9.The range of pressure values of Compress Spring 9 should according to 1.6 times of specified bleed pressure being more than or equal to cylinder type actuator.
One end of described bulb push rod 8 is provided with the second internal thread 26, for being connected with piston rod 6; The other end of described bulb push rod 8 is set to hemisphere 27, makes pin-lift arrangement when action, and holding point contacts; The position that the length of described bulb push rod 8 need be installed according to it customizes, to ensure the validity of pin-lift arrangement.
Described induction contact 1 is the cylindrical contact of end band first internal thread 28, and induction contact 1 provides to external chromacoder (position limit switch) feedback signal coming from pin-lift arrangement.
Stroke feedback ejector rod device of pneumatic actuator of the present invention is that a kind of stroke puts signal feedback device all the time, relies on the active force of Returnning spring and cylinder piston to realize replying the function with feedback without the need to additional any power.Stroke feedback ejector rod device of pneumatic actuator volume is little, and structural principle is simple.Piston action is in bulb push rod, and rely on mechanical kinetic energy to realize signal feed back, signal is installed on the signal feed back form of cylinder type actuator inside compared with other, more safe and reliable.Stroke feedback ejector rod device of pneumatic actuator low cost of manufacture, it is convenient to install, non-maintaining.
Claims (10)
1. stroke feedback ejector rod device of pneumatic actuator, is characterized in that: comprise induction contact (1), housing (3), piston (5), piston rod (6), bulb push rod (8) and Compress Spring (9); Described housing (3) inside is provided with inner chamber (14), and inner chamber (14) for placing Compress Spring (9) and piston (5), and play the guiding role to piston (5); Piston rod (6) is arranged in piston (5), induction contact (1) and piston rod (6) are fastenedly connected integral, tight by the first hexagon nut (2); Described piston rod (6) and housing (3) are slidably matched, the lower end of described Compress Spring (9) contacts with piston (5), the lower end of described piston (5) contacts with the step on piston rod (6), the lower end of described piston rod (6) is provided with bulb push rod (8), tight by the second hexagon nut (7).
2. stroke feedback ejector rod device of pneumatic actuator as claimed in claim 1, is characterized in that: in the circular port that described housing (3) coordinates with piston rod (6), is provided with two O-ring seals for the motive sealing of housing (3) with piston rod (6).
3. stroke feedback ejector rod device of pneumatic actuator as claimed in claim 1, is characterized in that: described in
A four directions (11) is provided with outside housing (3), described four directions (11) lower end is provided with the first step cutting pattern (12) for installing the first O-ring seals (4), described first step cutting pattern (12) lower end is provided with the first outside thread (13), for being connected with cylinder.
4. stroke feedback ejector rod device of pneumatic actuator as claimed in claim 1, it is characterized in that: the top of described inner chamber (14) is provided with the first manhole (15), the intermediate portion of the manhole of described inner chamber (14) is provided with two circular grooves (16), for installing the second O-ring seals (10).
5. stroke feedback ejector rod device of pneumatic actuator as claimed in claim 1, is characterized in that: described in
Piston (5) is cylindrical (18), and described piston (5) is provided with the uniform circular equalizing orifice (19) of four annulars.
6. stroke feedback ejector rod device of pneumatic actuator as claimed in claim 1, is characterized in that: described in
The two ends of piston rod (6) are respectively equipped with the second outside thread (22) and the 3rd outside thread (24).
7. stroke feedback ejector rod device of pneumatic actuator as claimed in claim 1, is characterized in that: described in
The side of piston rod (6) is provided with second step cutting pattern (21), for the location that piston (5) moves downward.
8. stroke feedback ejector rod device of pneumatic actuator as claimed in claim 1, is characterized in that: described in
The two ends of Compress Spring (9) are equipped with plane (25).
9. stroke feedback ejector rod device of pneumatic actuator as claimed in claim 1, is characterized in that: described in
One end of bulb push rod (8) is provided with the second internal thread (26), for being connected with piston rod (6); The other end of described bulb push rod (8) is set to hemisphere (27).
10. stroke feedback ejector rod device of pneumatic actuator as claimed in claim 1, is characterized in that: described induction contact (1) one end is the cylindrical contact with the first internal thread (28).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310590078.9A CN103591366B (en) | 2013-11-20 | 2013-11-20 | Stroke feedback ejector rod device of pneumatic actuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310590078.9A CN103591366B (en) | 2013-11-20 | 2013-11-20 | Stroke feedback ejector rod device of pneumatic actuator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103591366A CN103591366A (en) | 2014-02-19 |
| CN103591366B true CN103591366B (en) | 2016-01-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310590078.9A Active CN103591366B (en) | 2013-11-20 | 2013-11-20 | Stroke feedback ejector rod device of pneumatic actuator |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3656708A (en) * | 1970-07-10 | 1972-04-18 | Westinghouse Electric Corp | Dump valve |
| CN201575169U (en) * | 2009-12-29 | 2010-09-08 | 浙江远安流体设备有限公司 | Anti-leak butterfly valve |
| CN201764075U (en) * | 2010-08-31 | 2011-03-16 | 奥士奥控制阀门(上海)有限公司 | Spring cylinder-type actuating mechanism for single-action structure and double-action structure |
| CN102853150A (en) * | 2012-09-29 | 2013-01-02 | 山东佳信自动化有限公司 | Electric hydraulic executing device |
| CN203686313U (en) * | 2013-11-20 | 2014-07-02 | 无锡智能自控工程股份有限公司 | Stroke feedback mandrel device for pneumatic executing mechanism |
-
2013
- 2013-11-20 CN CN201310590078.9A patent/CN103591366B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3656708A (en) * | 1970-07-10 | 1972-04-18 | Westinghouse Electric Corp | Dump valve |
| CN201575169U (en) * | 2009-12-29 | 2010-09-08 | 浙江远安流体设备有限公司 | Anti-leak butterfly valve |
| CN201764075U (en) * | 2010-08-31 | 2011-03-16 | 奥士奥控制阀门(上海)有限公司 | Spring cylinder-type actuating mechanism for single-action structure and double-action structure |
| CN102853150A (en) * | 2012-09-29 | 2013-01-02 | 山东佳信自动化有限公司 | Electric hydraulic executing device |
| CN203686313U (en) * | 2013-11-20 | 2014-07-02 | 无锡智能自控工程股份有限公司 | Stroke feedback mandrel device for pneumatic executing mechanism |
Non-Patent Citations (1)
| Title |
|---|
| 新型弹簧复位三位式角行程气动执行器;方宁州;《通用机械》;20130831(第8期);38-39 * |
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| CN103591366A (en) | 2014-02-19 |
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