CN202992348U - Double-membrane pneumatic rotation angle type executing mechanism - Google Patents
Double-membrane pneumatic rotation angle type executing mechanism Download PDFInfo
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- CN202992348U CN202992348U CN 201220650641 CN201220650641U CN202992348U CN 202992348 U CN202992348 U CN 202992348U CN 201220650641 CN201220650641 CN 201220650641 CN 201220650641 U CN201220650641 U CN 201220650641U CN 202992348 U CN202992348 U CN 202992348U
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- membrane
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Abstract
The utility model relates to an executing mechanism of an automatic instrument, in particular to a membrane type executing mechanism converting linear displacement into angular displacement, and specifically discloses a double-membrane pneumatic rotation angle type executing mechanism. The double-membrane pneumatic rotation angle type executing mechanism comprises two membrane room mechanisms connected together through a transition plate, wherein a box body mechanism is arranged at the lower end of each membrane room mechanism. In the respect of output force, a double-layer membrane room structure is adopted, the two membrane rooms are provided with two membranes in coordination action and receive the same air pressure signals at the same time, the generated combined force pushes push rods to move and is converted into torque through a shift fork slide block mechanism, and the produced torque is improved by 50%. In the aspects of appearance and weight, double-weight type reinforcing springs are adopted, and therefore the total height of the entire executing mechanism can be lowered, the structure is enabled to be more compact, the weight is light, the combined linearity of the springs is better, the motion is stable and reliable, and the service lives of the springs and the membranes are prolonged. The double-membrane pneumatic rotation angle type executing mechanism is simple and reliable, convenient to use, low in manufacturing cost, and easy to maintain.
Description
Technical field
The utility model relates to the actuator in a kind of instrument and meter for automation, and especially a kind of diaphragm type is converted into linear displacement the actuator of angular displacement, specifically a kind of pair of film pneumatic corner formula actuator.
Background technique
Process control system or factory often use rotation class valve (as ball valve, butterfly valve, camflex valve etc.) to come flowing of control procedure fluid, and air bladder corner actuator is the device that drives valve event, its working principle is: after the output signal input film air chamber of regulator or positioning work piece, signal pressure produces thrust on film, putter component is moved, and Compress Spring, until the reaction force of spring and signal pressure are till the thrust that produces on film balances each other.This diaphragm type mechanism uses shift fork slide block or connecting rod usually, the straight line motion of push rod is converted into rotatablely move, and converts thrust to moment of torsion, with the rotation of movable valve.Common and positioning work piece is used in conjunction with, and the angle of swing of its output shaft feeds back to positioning work piece, can reach to make the pinpoint purpose of spin angular position.
The pressure that can bear due to diaphragm is lower, adds the pressure that upper spring will be offset the overwhelming majority, and remaining ouput force is just very little.In order to improve ouput force, the practice is exactly increased in size usually, makes the size of actuator and weight become very large; On the other hand, the on-the-spot source of the gas that uses is 500-700KPa normally, and it has only used half left and right, and air pressure does not take full advantage of.
Over nearly 20 years, people have successively made again various light-duty (or it is small-sized to be called essence) pneumatic actuator, and its main feature is: adopt many springs to replace the pneumatic actuator of the original old-fashioned heaviness of single big spring.Weight and profile all reduce to some extent, have obtained certain application.But still there are some problems in the actuator of this precision.On the one hand this class actuator is by a plurality of spring assemblies, and because the rigidity of each spring is different, the combination linear degree of spring is relatively poor, bumpy motion, and the life-span of diaphragm and spring all will have a greatly reduced quality.Straight line-rotating machinery converts thrust to torque on the other hand, usually adopt crank-connecting rod or crank block shifting fork mechanism, slide block frictional force is large, and in movement process, speed, acceleration change are large, cause thrust variation large, add push rod without guide structure, stationarity, the reliability of actuator's action are relatively poor.
Actuator for High Pressure Difference or large bore valves use requires to have very large torque, require adjusting highly sensitive, and installing space is limited, wishes that structure is compact, and existing this diaphragm actuator can not satisfy the demands usually.
Summary of the invention
The utility model is for the problems referred to above, provides that a kind of brand-new output torque is large, motion steadily reliable, compact structure and exquisite two film pneumatic corner formula actuator.
according to the technical solution of the utility model: a kind of pair of film pneumatic corner formula actuator, comprise two film houses that link together by transition plate, described film house lower end arranges chair mechanisms, feature is: described film house comprises by bolton upper membrane cover and lower membrane cover together, diaphragm is arranged between membrane cover and lower membrane cover, the film house is divided into upper film chamber and bottom film chamber, described upper film chamber is connected with source of the gas, the first push rod is set in described bottom film chamber, described the first push rod upper end is passed pallet and diaphragm successively, and be fixed on diaphragm by bounding means, the guide sleeve that is flush-mounted in transition plate is passed in described the first push rod lower end, the second interior push rod of another film house is threaded, described diaphragm lower end arranges pallet, guide pipe is fixedly installed on below pallet, pocketed springs assembly on described guide pipe, pallet is withstood in described spring assembly upper end, lower membrane cover is withstood in the lower end, in described casing, guide rod is set, slide block is slidably connected on described guide rod, described the second push rod lower end is screwed in internal thread through hole one end of slide block, also be provided with pilot hole on described slide block, establish the 3rd oilless bearing in described pilot hole, described pilot hole and internal thread through hole are set in parallel on slide block, also be provided with pin shaft hole on described slide block, the direction of described pin shaft hole and the direction of internal thread through hole are perpendicular, described casing also comprises upper cover plate, lower cover plate, described upper cover plate, built-in the first oilless bearing of difference in the mounting hole of lower cover plate, the second oilless bearing, the two ends of shift fork are rotated respectively and are arranged on the first oilless bearing, in the second oilless bearing, the shift fork center arranges splined hole, described slide block is fixed on shift fork by bearing pin, and can slide in the groove of shift fork, casing push rod upper end is screwed in the internal thread through hole the other end of slide block, back box lid is passed in described casing push rod lower end.
Described spring assembly comprises little spring, big spring, and described little spring is placed in the guide pipe endoporus, and described big spring is set on guide pipe.
Described guide rod passes oilless bearing, is fixed on front case lid and back box lid.Described the first push rod, the second push rod place are designed with guide structure.
Described casing adopts the symplex structure design, and the center splined hole by shift fork is connected with the positive and negative of valve transmission shaft, realizes the positive and negative action mode of actuator, has realized that namely valve is along closing contrary open or along the function of opening contrary pass.
Mounting limit seat on described back box lid, described position limit socket end mounting limit bar.Described casing push rod extend in position limit socket, and is undertaken spacing by position-limited lever.
Technique effect of the present utility model is: (1) is aspect ouput force, adopt a kind of duplicature cell structure, there is the diaphragm of two concerted actions two film chambers, accept simultaneously same air pressure signal, making a concerted effort of producing promote the push rod action and be converted to torque by the shift fork slide-block mechanism, the torque that produces has improved nearly 50%.(2) aspect profile and weight, adopt the double-type reinforcement spring, big spring is enclosed within the outside of little spring, the working depth of two springs is identical, rigidity is but not identical, but global stiffness is the rigidity sum of two springs, like this, just can reduce the total height of whole actuator, make structure more compact, lightweight, the combination linear of spring is better, motion steadily, has reliably extended the working life of spring and diaphragm.(3) motion steady aspect, the push rod place is designed with guide structure, makes actuator operate steadily, good reliability, long service life.(4) casing symplex structure design is connected with the positive and negative of valve transmission shaft by shift fork center splined hole, realizes the positive and negative action mode of actuator, has realized that namely valve is along closing contrary open or along the function of opening contrary pass.The utility model is simple and reliable, and is easy to use, and fabricating cost is low, is easy to safeguard.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is A-A sectional view in Fig. 1.
Fig. 3 is the housing structure schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is further described.
in Fig. 1, comprise film house 1, vent 2, transition plate 3, guide sleeve 4, upper membrane cover 5, lower membrane cover 6, diaphragm 7, pallet 8, bounding means 9, the first push rod 10, the second push rod 11, spring assembly 12, little spring 12-1, big spring 12-2, upper film chamber 13, bottom film chamber 14, guide pipe 15, casing 16, front case lid 17, back box lid 18, casing push rod 19, shift fork 20, slide block 21, guide rod 22, upper cover plate 23, the first oilless bearing 24, splined hole 25, internal thread through hole 26, pilot hole 27, pin shaft hole 28, the 3rd oilless bearing 29, bearing pin 30, position limit socket 31, position-limited lever 32, the second oilless bearing 33, lower cover plate 34 etc.
as shown in Figure 1, the utility model is a kind of pair of film pneumatic corner formula actuator, comprise two film houses 1 that link together by transition plate 3, described film house 1 lower end arranges chair mechanisms, described film house 1 comprises by bolton upper membrane cover 5 and lower membrane cover 6 together, diaphragm 7 is arranged between membrane cover 5 and lower membrane cover 6, film house 1 is divided into upper film chamber 13 and bottom film chamber 14, described upper film chamber 13 is connected with source of the gas, interior first push rod 10 that arranges of described bottom film chamber 14, described the first push rod 10 upper ends are passed pallet 8 and diaphragm 7 successively, and be fixed on diaphragm 7 by bounding means 9, the guide sleeve 4 that is flush-mounted in transition plate 3 is passed in described the first push rod 10 lower ends, the second interior push rod 11 of another film house 1 is threaded, described diaphragm 7 lower ends arrange pallet 8, guide pipe 15 is fixedly installed on pallet 8 belows, pocketed springs assembly 12 on described guide pipe 15, pallet 8 is withstood in described spring assembly 12 upper ends, lower membrane cover 6 is withstood in the lower end, the interior guide rod 22 that arranges of described casing 16, slide block 21 is slidably connected on described guide rod 22, described the second push rod 11 lower ends are screwed in internal thread through hole 26 1 ends of slide block 21, also be provided with pilot hole 27 on described slide block 21, establish the 3rd oilless bearing 29 in described pilot hole 27, described pilot hole 27 and internal thread through hole 26 are set in parallel on slide block 21, also be provided with pin shaft hole 28 on described slide block 21, the direction of the direction of described pin shaft hole 28 and internal thread through hole 26 is perpendicular, described casing 16 also comprises upper cover plate 23, lower cover plate 34, described upper cover plate 23, built-in the first oilless bearing 24 of difference in the mounting hole of lower cover plate 34, the second oilless bearing 33, the two ends of shift fork 20 are rotated respectively and are arranged on the first oilless bearing 24, in the second oilless bearing 33, shift fork 20 centers arrange splined hole 25, described slide block 21 is fixed on shift fork 20 by bearing pin 30, and can slide in the groove of shift fork 20, casing push rod 19 upper ends are screwed in internal thread through hole 26 the other ends of slide block 21, back box lid 18 is passed in described casing push rod 19 lower ends.
Described spring assembly 12 comprises little spring 12-1, big spring 12-2, and described little spring 12-1 is placed in guide pipe 15 endoporus, and described big spring 12-2 is set on guide pipe 15.
Described guide rod 22 passes oilless bearing 29, is fixed on front case lid 17 and back box lid 18.
Described the first push rod 10, the second push rod 11 places are designed with guide structure.
Described casing 16 adopts the symplex structures design, and the center splined hole by shift fork is connected with the positive and negative of valve transmission shaft, realizes the positive and negative action mode of actuator, has realized that namely valve is along closing contrary open or along the function of opening contrary pass.Described casing push rod extend in position limit socket 31, and is undertaken spacing by position-limited lever.
Working principle of the present utility model is as follows: adopt 1 series connection of two identical film houses, the diaphragm 7 that two concerted actions are arranged in two film houses 1, accept simultaneously same air pressure signal, make a concerted effort to promote the first push rod 10, the second push rod 11 actions that produce, 21 mechanisms are converted to torque by shift fork 20, slide block; Adopt the double-type reinforcement spring, reduce the total height of whole actuator, structure is more compact, and the combination linear of spring is better; Casing push rod 19 places are designed with guide structure, operate steadily, and reliability is high, extend the life-span of using casing actuator.Casing designs for symplex structure, is connected with the positive and negative of valve transmission shaft by shift fork 20 center splined holes 25, realizes the positive and negative action mode of actuator, has realized that namely valve is along closing contrary opening or suitable opening against the function of closing.
Claims (7)
1. two film pneumatic corner formula actuator, comprise two the film houses (1) that link together by transition plate (3), described film house (1) lower end arranges chair mechanisms, it is characterized in that: described film house (1) comprises by bolton upper membrane cover (5) and lower membrane cover (6) together, diaphragm (7) is arranged between membrane cover (5) and lower membrane cover (6), film house (1) is divided into upper film chamber (13) and bottom film chamber (14), described upper film chamber (13) is connected with source of the gas, the first push rod (10) is set in described bottom film chamber (14), described the first push rod (10) upper end is passed pallet (8) and diaphragm (7) successively, and be fixed on diaphragm (7) by bounding means (9), the guide sleeve (4) that is flush-mounted in transition plate (3) is passed in described the first push rod (10) lower end, interior the second push rod (11) of another film house (1) is threaded, described diaphragm (7) lower end arranges pallet (8), guide pipe (15) is fixedly installed on below pallet (8), the upper pocketed springs assembly (12) of described guide pipe (15), pallet (8) is withstood in described spring assembly (12) upper end, lower membrane cover (6) is withstood in the lower end, guide rod (22) is set in described casing (16), slide block (21) is slidably connected on described guide rod (22), described the second push rod (11) lower end is screwed in internal thread through hole (26) one ends of slide block (21), also be provided with pilot hole (27) on described slide block (21), establish the 3rd oilless bearing (29) in described pilot hole (27), described pilot hole (27) and internal thread through hole (26) are set in parallel on slide block (21), also be provided with pin shaft hole (28) on described slide block (21), the direction of the direction of described pin shaft hole (28) and internal thread through hole (26) is perpendicular, described casing (16) also comprises upper cover plate (23), lower cover plate (34), described upper cover plate (23), difference built-in the first oilless bearing (24) in the mounting hole of lower cover plate (34), the second oilless bearing (33), the two ends of shift fork (20) are rotated respectively and are arranged on the first oilless bearing (24), in the second oilless bearing (33), shift fork (20) center arranges splined hole (25), described slide block (21) is fixed on shift fork (20) by bearing pin (30), and can slide in the groove of shift fork (20), casing push rod (19) upper end is screwed in internal thread through hole (26) the other end of slide block (21), back box lid (18) is passed in described casing push rod (19) lower end.
2. according to claimed in claim 1 pair of film pneumatic corner formula actuator, it is characterized in that: described spring assembly (12) comprises little spring (12-1), big spring (12-2), described little spring (12-1) is placed in guide pipe (15) endoporus, and described big spring (12-2) is set on guide pipe (15).
3. according to claimed in claim 1 pair of film pneumatic corner formula actuator, it is characterized in that: described guide rod (22) passes oilless bearing (29), is fixed on front case lid (17) and back box lid (18).
4. as claimed in claim 1 pair of film pneumatic corner formula actuator, it is characterized in that: described the first push rod (10), the second push rod (11) locate to be provided with guide structure.
5. as claimed in claim 1 pair of film pneumatic corner formula actuator, it is characterized in that: described casing (16) adopts symplex structure, and the center splined hole (25) by shift fork (20) is connected with the positive and negative of valve transmission shaft.
6. according to claimed in claim 4 pair of film pneumatic corner formula actuator, it is characterized in that: the upper mounting limit seat (31) of described back box lid (18), described position limit socket (31) end mounting limit bar (32).
7. according to claimed in claim 1 pair of film pneumatic corner formula actuator, it is characterized in that: described casing push rod extend in position limit socket (31), and is undertaken spacing by position-limited lever (32).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220650641 CN202992348U (en) | 2012-11-30 | 2012-11-30 | Double-membrane pneumatic rotation angle type executing mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220650641 CN202992348U (en) | 2012-11-30 | 2012-11-30 | Double-membrane pneumatic rotation angle type executing mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202992348U true CN202992348U (en) | 2013-06-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220650641 Expired - Lifetime CN202992348U (en) | 2012-11-30 | 2012-11-30 | Double-membrane pneumatic rotation angle type executing mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202992348U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102966787A (en) * | 2012-11-30 | 2013-03-13 | 无锡智能自控工程股份有限公司 | Double-film pneumatic and rotary actuator |
| CN111520527A (en) * | 2020-03-20 | 2020-08-11 | 中国船舶重工集团公司第七O三研究所无锡分部 | Large-torque double-film angular travel actuator |
-
2012
- 2012-11-30 CN CN 201220650641 patent/CN202992348U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102966787A (en) * | 2012-11-30 | 2013-03-13 | 无锡智能自控工程股份有限公司 | Double-film pneumatic and rotary actuator |
| CN111520527A (en) * | 2020-03-20 | 2020-08-11 | 中国船舶重工集团公司第七O三研究所无锡分部 | Large-torque double-film angular travel actuator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130612 |
|
| CX01 | Expiry of patent term |