CN201502775U - Superposition double-cylinder actuating mechanism - Google Patents
Superposition double-cylinder actuating mechanism Download PDFInfo
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- CN201502775U CN201502775U CN2009201289988U CN200920128998U CN201502775U CN 201502775 U CN201502775 U CN 201502775U CN 2009201289988 U CN2009201289988 U CN 2009201289988U CN 200920128998 U CN200920128998 U CN 200920128998U CN 201502775 U CN201502775 U CN 201502775U
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- master cylinder
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Abstract
The utility model discloses a superposition double-cylinder actuating mechanism, which comprises a main cylinder (1) and an auxiliary cylinder (2), wherein the auxiliary cylinder (2) is arranged on the main cylinder (1); an upper cover (4) and a lower cover (5) of the main cylinder (1) are respectively provided with gas ports (4a, 5a); a lower cover (10) and an upper cover (12) of the auxiliary cylinder (2) are also respectively provided with gas ports (10a, 12a); and the lower end of an auxiliary push rod (14) of the auxiliary cylinder (2) is connected with the upper end of a main push rod (7) of the main cylinder (1). In the utility model, a spring that is arranged on an execution mechanism of the traditional adjustable valve is saved, and the auxiliary cylinder is additionally arranged, thereby not only avoiding the affection to the stability for controlling the valve caused by the vibration when the spring is pressed by a piston, but also reducing the requirement on the gas intake pressure; meanwhile, the push power of the execution mechanism can be improved by over 50%.
Description
Technical field
The utility model belongs to the actuator of pneumatic control valve, specifically, relates to the two cylinder actuators of a kind of overlapping.
Background technique
Modulating valve claims control valve again, and it is the device that removes to change fluid flow in the process control system with power operation.Modulating valve is made up of actuator and valve part two-part.At present, the structure of known pneumatic control valve actuator as shown in Figure 1, mainly form by component such as cylinder block 1, cylinder upper cover 2, lower cover of air cylinder 3, piston 4, push rod 5, springs 6, described cylinder block 1, cylinder upper cover 2 and piston 4 common formation air chambers, and on cylinder upper cover 2, have gas port.When feeding the source of the gas of certain pressure by the gas port on the cylinder upper cover 2 in air chamber, piston 4 pressurizeds move down along cylinder block 1 inwall, and the push rod 5 that is fixed on the piston 4 moves down, and form certain stroke, pressure spring 6 all the time in this process; On the contrary, when the gas port of gas from cylinder upper cover 2 of air chamber emitted, compressed spring 6 resetted, and promoted piston 4 and moved upward, and the push rod 5 that is fixed on the piston 4 moves up, and forms certain stroke.The up and down certain stroke of pneumatic control valve actuator by push rod 5 move the control that realizes the modulating valve valve opening and closing.In actual use, we find that there is following shortcoming in this actuator: 1, press down piston when the air chamber air inlet, piston drives push rod and moves down, because the spring rigidity causes the discontinuous of displacement easily, and influence the stability that valve is controlled.2, as mentioned above, be that resetting of the pressured spring that contracts drives when push rod moves upward, so the precision of spring must exert an influence to the displacement of push rod, and then influence the precision of valve control.3, because the restriction of single cylinder list piston surface area and the resistance of spring need sizable air pressure could realize the ouput force of design.
The model utility content
The purpose of this utility model is to provide that a kind of valve control stability is good, precision is high, and the two cylinder actuators of a kind of overlapping in valve control labour-saving.
The technical solution of the utility model is as follows: comprise master cylinder, described master cylinder is by the master cylinder body, the master cylinder loam cake, the master cylinder lower cover, main piston and primary push rod are formed, described master cylinder body and master cylinder loam cake and master cylinder lower cover constitute air chamber jointly, and under described master cylinder loam cake and master cylinder, cover and have the air outlet, described main piston is divided into upper gas chamber and lower chamber two-part with above-mentioned air chamber, and this main piston center is installed with primary push rod, this primary push rod upper end is passed described main piston and is fixed together with it, it is characterized in that: on described master cylinder, assistant cylinder is installed, described assistant cylinder comprises the assistant cylinder lower cover, the assistant cylinder body, the assistant cylinder loam cake, auxiliary piston and auxiliary push-rod, on above-mentioned master cylinder, cover the assistant cylinder lower cover that described assistant cylinder is installed, the assistant cylinder body is housed above described assistant cylinder lower cover, the assistant cylinder loam cake is installed in upper end at this assistant cylinder body, described assistant cylinder lower cover, assistant cylinder body and assistant cylinder loam cake form auxiliary tank, side at described assistant cylinder lower cover has gas port, on described assistant cylinder, cover and also have gas port, in the described assistant cylinder body auxiliary piston is arranged, this auxiliary piston is divided into auxiliary tank and following auxiliary tank two-part with described auxiliary tank, center at described auxiliary piston is installed with auxiliary push-rod, the lower end of this auxiliary push-rod is passed above-mentioned assistant cylinder lower cover and master cylinder loam cake and described primary push rod and is linked together, and it is affixed through nut that auxiliary piston is passed in the upper end of this auxiliary push-rod.
When the two cylinder actuators of this overlapping work, when if the gas port that covers on gas port that covers on the pressurized air master cylinder and the assistant cylinder enters on master cylinder upper gas chamber and the assistant cylinder auxiliary tank respectively, pressurized air moves down two-piston, described two-piston drives the push rod of being fixed separately and moves down, form certain stroke, meanwhile, the air of auxiliary tank is discharged by the gas port of the gas port that covers under the master cylinder and assistant cylinder lower cover under master cylinder lower chamber and the assistant cylinder; On the contrary, when if the gas port that covers under gas port that pressurized air covers under master cylinder and the assistant cylinder enters under master cylinder lower chamber and the assistant cylinder auxiliary tank respectively, pressurized air moves up two-piston, described two-piston drives the push rod of being fixed separately and moves up, form certain stroke, meanwhile, the air of auxiliary tank is discharged by the gas port that covers on the gas port that covers on the master cylinder and the assistant cylinder on master cylinder upper gas chamber and the assistant cylinder.Like this, the certain up and down stroke by primary push rod and auxiliary push-rod moves the control that realizes the modulating valve valve opening and closing.
The upper end of described auxiliary push-rod lower end and above-mentioned primary push rod links together by swivel nut.This Placement is simple in structure, is connected firmly easy accessibility.
In order to prevent in the course of the work, relatively rotate between primary push rod and the swivel nut and to cause the two to be connected loosening, be provided with tapped hole in the side of described swivel nut, screw is packed in this tapped hole described primary push rod locking.
Beneficial effect: the utility model removes the spring in the actuator of traditional modulating valve, increased assistant cylinder, not only avoided because of causing under the piston that vibration influences the valve control accuracy to the influence of valve control stability and because of the precision of spring during pressing spring, and, make the thrust of actuator to increase more than 50% simultaneously to suction pressure requirement reduction.
Description of drawings
Fig. 1 is the structural drawing of the actuator of known pneumatic control valve.
Fig. 2 is a structural representation of the present utility model.
Fig. 3 is the linkage structure schematic representation between primary push rod and the auxiliary push-rod.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples:
As Fig. 2, shown in Figure 3, the two cylinder actuators of a kind of overlapping, form by master cylinder 1 and assistant cylinder 2, described master cylinder 1 comprises master cylinder body 3, master cylinder loam cake 4, master cylinder lower cover 5, main piston 6 and primary push rod 7, master cylinder loam cake 4 and master cylinder lower cover 5 link together with tubulose master cylinder body 3 respectively by bolt, form air chamber; Main piston 6 is assemblied in the air chamber, is provided with seal ring between main piston 6 and master cylinder body 3 inwalls, and air chamber is divided into upper gas chamber 8 and lower chamber 9 two-part, offers gas port 4a, 5a respectively on described master cylinder loam cake 4 and master cylinder lower cover 5.Master cylinder lower cover 5 and main piston 6 are passed in primary push rod 7 upper ends, and are fixed together by the attaching nut with main piston 6.Assistant cylinder 2 is installed on master cylinder loam cake 4, this assistant cylinder 2 is made up of assistant cylinder lower cover 10, assistant cylinder body 11, assistant cylinder loam cake 12, auxiliary piston 13 and auxiliary push-rod 14, assistant cylinder lower cover 10 is fixed on the master cylinder loam cake 4 by bolt, and on assistant cylinder lower cover 10, have a gas port 10a, tubulose assistant cylinder body 11 is installed on assistant cylinder lower cover 10, above assistant cylinder body 11, assistant cylinder loam cake 12 is installed by bolt, thereby, on assistant cylinder loam cake 12, have gas port 12a with assistant cylinder 2 sealings.Assembling auxiliary piston 13 in the assistant cylinder body 11, and the seal ring sealing is set between the two, this auxiliary piston 13 is divided into auxiliary tank 15 and following auxiliary tank 16 two-part with auxiliary tank.Be installed with auxiliary push-rod 14 at auxiliary piston 13 centers, the upper end of this auxiliary push-rod 14 is passed auxiliary piston 13 and is fixed together by nut and auxiliary piston 13, the lower end of this auxiliary push-rod 14 passes assistant cylinder lower cover 10 and master cylinder loam cake 4 links together by swivel nut 17 with above-mentioned primary push rod 7, between described primary push rod 7 and assistant cylinder lower cover 10, be provided with seal ring, prevent gas leakage, the side thread mill drilling of described swivel nut 17, bolt 18 passes tapped hole and withstands primary push rod 7, thereby has strengthened the steadiness that is connected between primary push rod 7 and the swivel nut 17.
When the actuator of this pneumatic control valve works, when pressurized air from master cylinder loam cake 4 gas port 4a and during the last auxiliary tank 15 of the upper gas chamber 8 that enters master cylinder 1 respectively of the gas port 12a on the assistant cylinder loam cake 12 and assistant cylinder 2, pressurized air makes main piston 6 and auxiliary piston 13 move down simultaneously, described two-piston drives primary push rod 7 respectively and auxiliary push-rod 14 moves down, form certain stroke, meanwhile, the air of the following auxiliary tank 16 of the lower chamber 9 of master cylinder 1 and assistant cylinder 2 is discharged by gas port 5a on the master cylinder lower cover 5 and the gas port 10a on the assistant cylinder lower cover 10; On the contrary, when pressurized air from master cylinder lower cover 5 gas port 5a and during the following auxiliary tank 16 of the lower chamber 9 that enters master cylinder 1 respectively of the gas port 10a on the assistant cylinder lower cover 10 and assistant cylinder 2, pressurized air makes main piston 6 and auxiliary piston 13 move up simultaneously, described two-piston drives primary push rod 7 respectively and auxiliary push-rod 14 moves up, form certain stroke, meanwhile, the air of the last auxiliary tank 15 of the upper gas chamber 8 of master cylinder 1 and assistant cylinder 2 is discharged by gas port 4a on the master cylinder loam cake 4 and the gas port 12a on the assistant cylinder loam cake 12.Like this, the certain up and down stroke by primary push rod 7 and auxiliary push-rod 14 moves the control that realizes the modulating valve valve opening and closing.
Claims (3)
1. two cylinder actuators of an overlapping, comprise master cylinder (1), described master cylinder (1) is by master cylinder body (3), master cylinder loam cake (4), master cylinder lower cover (5), main piston (6) and primary push rod (7) are formed, described master cylinder body (3) constitutes air chamber jointly with master cylinder loam cake (4) and master cylinder lower cover (5), on described master cylinder loam cake (4) and master cylinder lower cover (5), have air outlet (4a, 5a), the main piston (6) of master cylinder (1) is divided into upper gas chamber (8) and lower chamber (9) two-part with air chamber, and this main piston (6) center is installed with primary push rod (7), this primary push rod (7) upper end is passed described main piston (6) and is fixed together with it, it is characterized in that: go up at described master cylinder (1) assistant cylinder (2) is installed, described assistant cylinder (2) comprises assistant cylinder lower cover (10), assistant cylinder body (11), assistant cylinder loam cake (12), auxiliary piston (13) and auxiliary push-rod (14), go up the assistant cylinder lower cover (10) that described assistant cylinder (2) is installed at above-mentioned master cylinder loam cake (4), in the top of this assistant cylinder lower cover (10) assistant cylinder body (11) is housed, assistant cylinder loam cake (12) is installed in upper end at this assistant cylinder body (11), described assistant cylinder lower cover (10), assistant cylinder body (11) and assistant cylinder loam cake (12) constitute auxiliary tank jointly, have gas port (10a) in described assistant cylinder lower cover (10) one sides, on described assistant cylinder loam cake (12), also have gas port (12a), auxiliary piston (13) is arranged in the described assistant cylinder body (11), this auxiliary piston (13) is divided into auxiliary tank (15) and following auxiliary tank (16) two-part with described auxiliary tank, be installed with auxiliary push-rod (14) at the center of described auxiliary piston (13), the lower end of this auxiliary push-rod (14) passes described assistant cylinder lower cover (10) and master cylinder loam cake (4) links together with described primary push rod (7), and it is affixed through nut that described auxiliary piston (13) is passed in the upper end of this auxiliary push-rod (14).
2. the two cylinder actuators of overlapping according to claim 1, it is characterized in that: the upper end of described auxiliary push-rod (14) lower end and described primary push rod (7) links together by swivel nut (17).
3. the two cylinder actuators of overlapping according to claim 2, it is characterized in that: the side at described swivel nut (17) is provided with tapped hole, and screw (18) is packed into, and this tapped hole is interior to lock described primary push rod (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201289988U CN201502775U (en) | 2009-09-23 | 2009-09-23 | Superposition double-cylinder actuating mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201289988U CN201502775U (en) | 2009-09-23 | 2009-09-23 | Superposition double-cylinder actuating mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201502775U true CN201502775U (en) | 2010-06-09 |
Family
ID=42453708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201289988U Expired - Fee Related CN201502775U (en) | 2009-09-23 | 2009-09-23 | Superposition double-cylinder actuating mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201502775U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102434520A (en) * | 2011-12-12 | 2012-05-02 | 航天长征化学工程股份有限公司 | Gas-liquid mixing driving valve actuating mechanism |
| CN104633248A (en) * | 2015-02-10 | 2015-05-20 | 无锡智能自控工程股份有限公司 | Low-frictional piston type actuator |
-
2009
- 2009-09-23 CN CN2009201289988U patent/CN201502775U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102434520A (en) * | 2011-12-12 | 2012-05-02 | 航天长征化学工程股份有限公司 | Gas-liquid mixing driving valve actuating mechanism |
| CN102434520B (en) * | 2011-12-12 | 2015-04-01 | 航天长征化学工程股份有限公司 | Gas-liquid mixing driving valve actuating mechanism |
| CN104633248A (en) * | 2015-02-10 | 2015-05-20 | 无锡智能自控工程股份有限公司 | Low-frictional piston type actuator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100609 Termination date: 20150923 |
|
| EXPY | Termination of patent right or utility model |