CN105351602B - The manual automatic switchover arrangement of clutch of pneumatic actuator - Google Patents
The manual automatic switchover arrangement of clutch of pneumatic actuator Download PDFInfo
- Publication number
- CN105351602B CN105351602B CN201510771660.4A CN201510771660A CN105351602B CN 105351602 B CN105351602 B CN 105351602B CN 201510771660 A CN201510771660 A CN 201510771660A CN 105351602 B CN105351602 B CN 105351602B
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- cam
- screws
- half screws
- clutch
- pneumatic actuator
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Classifications
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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
-
- 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
- F16K31/44—Mechanical actuating means
- F16K31/50—Mechanical actuating means with screw-spindle or internally threaded actuating means
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmission Devices (AREA)
- Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
Abstract
A kind of pneumatic actuator includes housing with manual automatic switchover arrangement of clutch, leading screw, guide rod, cam, the first half screws, pulling block, the second half screws, angle stroke cylinder and square shaft, the first round tube hole passed through for guide rod is opened up on housing, with the second round tube hole passed through for leading screw, the bottom of housing opens up the circular hole passed through for square shaft, cam is fitted respectively on the first half screws and pulling block, pulling block is fixedly connected with the second half screws, one end of square shaft passes through from circular hole, and sequentially pass through the cam on cam and pulling block on the first half screws, the output shaft that the other end of square shaft forms cylinder with angle is equipped with, pulling block left and right linear slide in the first half screws, so that the first half screws and the second half screw closure or separation, so as to leading screw and the first half screws, the second half screw engagements depart from.Using the manually operated and pneumatically-operated reliable switching of the achievable pneumatic actuator of the present invention, pneumatic operation and manually operated automatic switchover can be realized again.
Description
Technical field：
The present invention relates to pneumatic actuator technical field, the automatic switchover manually of more particularly to a kind of pneumatic actuator
Arrangement of clutch, the arrangement of clutch need with pneumatic operation to switch to manually operated after being used for the subsidiary handwheel of pneumatic actuator
Occasion, the arrangement of clutch is by controlling the separation of screw and leading screw and engaging to reach the manually operated mesh switched with pneumatic operation
's.
Background technology：
Pneumatic actuator is the drive device that the air pressure of control device is converted to power output, and it provides thrust or torsion
Square, for driving all kinds of control valves and air door, it is widely used in automatically adjusting and remotely controlling for chemical industry, oil, metallurgy, electric power etc.
System.When site examining and repairing or failure, it is necessary to carry out manual hand manipulation using the subsidiary handwheel of pneumatic actuator,
To ensure equipment and personal security, prevent security incident.The subsidiary handwheel of pneumatic actuator should ensure handwheel machine
Structure does not influence the operation of pneumatic actuator, ensures to be operated manually under without pneumatically-operated occasion again, wherein
Difficult point be the design of manual automatic switchover arrangement of clutch.
Existing arrangement of clutch separates usually through by leading screw with the method that executing agency push rod disengages to carry out operation, a kind of
Leading screw is made into hollow-core construction, push rod free movement in screw, leading screw connected with push rod by latch limit push rod from
By moving, realize and separate manually and pneumatically；It is a kind of that leading screw is equally made into hollow-core construction, push rod can the free movement in leading screw,
Free movement of the push rod in leading screw is limited by push rod, to realize manual and pneumatic separation.
Handwheel need to return to the problem of home when the handwheel of both forms all has pneumatic operation, if handwheel
Mechanism is not returned to home in pneumatic operation, then follow-up pneumatic operation will be had an impact, such switch forms without
Method realizes that safety interlocking is automatically brought into operation, scaling difficulty.
The content of the invention：
In view of this, it is necessary to provide a kind of pneumatic actuator with manual automatic switchover arrangement of clutch.
A kind of manual automatic switchover arrangement of clutch of pneumatic actuator, including housing, leading screw, guide rod, cam, the first half
Screw, pulling block, the second half screw, angle stroke cylinder and square shafts, the first round tube hole passed through for guide rod is opened up on housing, and use
In the second round tube hole that leading screw passes through, the bottom of housing opens up the circular hole passed through for square shaft, and cam is fitted respectively over the first half
On screw and pulling block, pulling block is fixedly connected with the second half screws, and one end of square shaft passes through from circular hole, and sequentially passes through the first half
The cam on cam and pulling block on mother, the output shaft of the other end and angle stroke cylinder of square shaft are equipped with, and pulling block is at the first half
Left and right linear slide in mother so that the first half screws and the second half screw closure or separation, so as to leading screw and the first half screws, the
2 half screws are engaged or departed from.
Preferably, cam includes the first cam, the second cam, the 3rd cam, the first cam, the second cam and the 3rd cam
On open up square hole, the rear and front ends of the first half screws opens up chute, and the left end of the first half screws is hollow form, the first half screws
The top of left end opens up the U-shaped hole being equipped with for the first cam, and bottom opens up the U-shaped hole being equipped with for the second cam, and pulling block includes convex
One end of wheel equipped block, the first linking arm and the second linking arm, the first linking arm and the second linking arm respectively it is fixed be fitted in it is convex
The other end of the front-end and back-end on the right side of the equipped block of wheel, the first linking arm and the second linking arm is from two before and after the first half screws
The chute at end slips over, and is fixedly connected with the second half screws, and cam is equipped with the U-shaped hole for opening up on block and being equipped with for the 3rd cam, convex
The equipped block of wheel is between the top and bottom of the left end of the first half screws, on the first cam, the second cam and the 3rd cam
The position of square hole is corresponding.
Preferably, the first linking arm and the second linking arm are fixedly connected by cylindrical pin with internal thread with the second half screws, and
One linking arm, the second linking arm and cam are equipped with block and are integrally formed.
Preferably, the square hole on the first cam, the second cam and the 3rd cam is located at the eccentric part of each cam, and first is convex
Wheel, the second cam and the 3rd cam are fitted on square shaft, the diameter for crossing square hole central point of the first cam and the mistake of the second cam
The angle for the diameter that the diameter of square hole centerline and the 3rd cam cross square hole central point is 90 degree.
Preferably, angle stroke cylinder is single-acting gas force open type cylinder, and output angle is less than or equal to 90 °.
Preferably, cover plate is fixedly mounted using screw in the left and right ends of housing.
Preferably, guide sleeve is equipped with the first round tube hole.
Preferably, the positioning hole for positioning square shaft is opened up on housing, the upper end of square shaft is spacing using circlip.
Preferably, angle stroke cylinder is fixedly connected with the casing by transition connecting plate.
Preferably, angle stroke cylinder is fixedly connected in transition connecting plate using screw, connected transition using screw
Plate is fixedly connected on the lower section of housing, and at circular hole.
When carrying out operation using the present invention, to be ventilated to angle stroke cylinder, then angle stroke cylinder drives square shaft to rotate counterclockwise,
Square shaft is separated by the screw of cam driven the first half with the second half screws so that leading screw and the first half screws, the second half
Mother disengages, and now, pneumatic actuator can be along the free linear slide of guide rod with manual automatic switchover arrangement of clutch；After dying,
Angle stroke cylinder is resetted, and drives square shaft to rotate clockwise, and square shaft is closed by the screw of cam driven the first half and the second half screws
Close so that leading screw and the first half screws, the second half screws are meshed, and now could control manual automatic switchover by rotating threaded shaft
Arrangement of clutch moves along a straight line along guide rod, so as to drive pneumatic actuator to move.In this way, pneumatic perform can be achieved using the present invention
The reliable switching of the manually operated and pneumatic operation function of mechanism, can realize pneumatic operation and manually operated automatic switchover again.
Brief description of the drawings：
Fig. 1 is the structural representation that pneumatic actuator is blown with manual automatic switchover arrangement of clutch.
Fig. 2 is the cross-sectional view of the manual automatic switchover arrangement of clutch of pneumatic actuator.
Fig. 3 is the structural representation of the first half screws in Fig. 1.
Fig. 4 is the structural representation of pulling block in Fig. 1.
Fig. 5 is the assembling structure schematic diagram of the first half screws in Fig. 1, the second half screws and pulling block.
Fig. 6 is the structural representation of the motion principle of the first half screws and the second half screws in Fig. 1.
Fig. 7 is the view of the first half screws and the second half screw movement locus in Fig. 1.
Fig. 8 is the view of the first half screws and the second half another movement locus of screw in Fig. 1.
In figure：Housing 1, the first round tube hole 11, the second round tube hole 12, circular hole 13, cover plate 14, guide sleeve 15, positioning hole 16,
Circlip 17, leading screw 2, guide rod 3, the first cam 40, the second cam 41, the 3rd cam 42, the first half screws 50, chute 501,
Pulling block 51, cam are equipped with block 511, the first linking arm 512, the second linking arm 513, the second half screws 52, angle stroke cylinder 6, side
Axle 7, transition connecting plate 8, pivot O points 9.
Embodiment：
The manual automatic switchover arrangement of clutch of pneumatic actuator, including housing, leading screw, guide rod, cam, the first half
Mother, pulling block, the second half screw, angle stroke cylinder and square shafts, the first round tube hole passed through for guide rod is opened up on housing, and be used for
The second round tube hole that leading screw passes through, the bottom of housing open up the circular hole passed through for square shaft, and cam is fitted respectively over the first half
On female and pulling block, pulling block is fixedly connected with the second half screws, and one end of square shaft passes through from circular hole, and sequentially passes through the first half screws
On cam and pulling block on cam, the output shaft of the other end and angle stroke cylinder of square shaft is equipped with, and pulling block is in the first half screws
Middle left and right linear slide so that the first half screws and the second half screw closure or separation, so as to leading screw and the first half screw, second
Half screw is engaged or departed from.
The invention provides a kind of preferable embodiment：Please refer to Fig. 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5, pneumatically hold
Row mechanism includes housing 1, leading screw 2, guide rod 3, the first cam 40, the second cam the 41, the 3rd with manual automatic switchover arrangement of clutch
Cam 42, the first half screws 50, pulling block 51, the second half screw 52, angle stroke cylinder 6 and square shafts 7, open up for leading on housing 1
The first round tube hole 11 that bar 3 passes through, and the second round tube hole 12 passed through for leading screw 2, the bottom of housing 1 are opened up for square shaft 7
The circular hole 13 passed through, opens up square hole on the first cam 40, the second cam 41 and the 3rd cam 42, and front and rear the two of the first half screws 50
End opens up chute 501, and the left end of the first half screws 50 is hollow form, and the top of the left end of the first half screws 50 opens up convex for first
The equipped U-shaped hole of wheel 40, bottom open up the U-shaped hole being equipped with for the second cam 41, and pulling block 51 includes cam and is equipped with block 511, first
Fixation is fitted in cam respectively for one end of the linking arm 513 of linking arm 512 and second, the first linking arm 512 and the second linking arm 513
The other end of the front-end and back-end on the right side of equipped block 511, the first linking arm 512 and the second linking arm 513 is from the first half screws
The chute 501 of 50 rear and front end slips over, and is fixedly connected with the second half screws 52, and cam is equipped with block 511 and opened up for the 3rd
The equipped U-shaped hole of cam 42, cam are equipped with block 511 between the top and bottom of the left end of the first half screws 50, and first is convex
The position of the 40, second cam 41 of wheel and the square hole on the 3rd cam 42 is corresponding, and one end of square shaft 7 passes through from circular hole 13, and according to
The secondary square hole passed through on the first half cam 40, the second cam 41 and the 3rd cams 42, the other end and the angle stroke cylinder 6 of square shaft 7
Output shaft be equipped with, chute 501 or so linear slide of the pulling block 51 in the first half screws 50 so that the first half screws 50 and
2 half screws 52 are closed or separated, so as to which leading screw 2 and the first half screws 50, the second half screws 52 engage or depart from.First connection
Arm 512 and the second linking arm 513 are fixedly connected by cylindrical pin with internal thread with the second half screws 52, the first linking arm 512, second
Linking arm 513 and cam are equipped with block 511 and are integrally formed.
Square hole on first cam 40, the second cam 41 and the 3rd cam 42 is located at the eccentric part of each cam, the first cam
40th, the second cam 41 and the 3rd cam 42 are fitted on square shaft 7, the diameter for crossing square hole central point of the first cam 40 and second convex
The angle for the diameter that the diameter for crossing square hole centerline of wheel 41 and the 3rd cam 42 cross square hole central point is 90 degree.
Angle stroke cylinder 6 is single-acting gas force open type cylinder, and output angle is less than or equal to 90 °.
Cover plate 14 is fixedly mounted using screw in the left and right ends of housing 1.Guide sleeve 15 is equipped with first round tube hole 11.Housing 1
On open up positioning hole 16 for positioning square shaft 7, the upper end of square shaft 7 is spacing using circlip 17, and circlip 17 is positioned at fixed
At the hole 16 of position.Angle stroke cylinder 6 is fixedly connected by transition connecting plate 8 with housing 1.Angle stroke cylinder 6 is fixed using screw
It is connected in transition connecting plate 8, transition connecting plate 8 is fixedly connected on to the lower section of housing 1 using screw, and be located at circular hole 13
Place.
When carrying out operation using the present invention, ventilated to angle stroke cylinder 6, then angle stroke cylinder 6 drives square shaft 7 to turn counterclockwise
Dynamic, square shaft 7 drives the first half screws 50 to divide with the second half screws 52 by the first cam 40, the second cam 41 and the 3rd cam 42
From so that leading screw 2 and the first half screws 50, the second half screws 52 disengage, now, pneumatic actuator with cutting automatically manually
Changing arrangement of clutch can be along 3 free linear slide of guide rod；After dying, angle stroke cylinder 6 resets, and drives square shaft 7 to turn clockwise
Dynamic, square shaft 7 drives the first half screws 50 and the second half screws 52 to close by the first cam 40, the second cam 41 and the 3rd cam 42
Close so that leading screw 2 and the first half screws 50, the second half screws 52 are meshed, now by rotating threaded shaft 2 could control it is manual oneself
Dynamic switching arrangement of clutch moves along a straight line along guide rod, so as to drive pneumatic actuator to move.In this way, using the achievable gas of the present invention
The reliable switching of the manually operated and pneumatic operation function of dynamic executing agency, can realize again pneumatic operation with it is manually operated automatic
Switching.
Fig. 6 is the first half screw and second half female motion principle figure, and first half female and during the second half screw closures, position
Configuration state is referred to shown in Fig. 6 (a), when angle stroke cylinder drives square shaft to be rotated counterclockwise around pivot O points 9, first
The screw motion of the cam driven of cam 40 and second the first half, the 3rd cam 42 drive pulling block 51 to move, when square shaft rotates 90 °,
Shown in exercise end position such as Fig. 6 (b) of the first half screws 50 and the second half screws 52, now, the first half screws the 50, the 3rd half
Screw 52 and leading screw 2 separate.The separating distance of the first half screws 50 and the second half screws 52 arrives cam for pivot O points 9
2 times of centre distance.After Fig. 7 and Fig. 8 combine for the first half screws 50 and the second half screws 52, movement locus view,
Rotary square shaft, square shaft drive three cams to be rotated with rotation center line O points 9, the first cam, the second cam and the 3rd cam rotating band
Dynamic the first half screw 50 and the second half screws 52 are closed or separated.Fig. 7 also closes for the first half screws 50 and the second half screws 52
When location state diagram, Fig. 8 also for 90 ° of square shaft rotate counterclockwise when, position when the first half screws 7 and the second half screws 9 separate
Configuration state figure.
Claims (10)
- A kind of 1. manual automatic switchover arrangement of clutch of pneumatic actuator, it is characterised in that：Pneumatic actuator is used manually certainly Dynamic switching arrangement of clutch include housing, leading screw, guide rod, cam, the first half screws, pulling block, the second half screws, angle stroke cylinder and Square shaft, the first round tube hole passed through for guide rod, and the second round tube hole passed through for leading screw, the bottom of housing are opened up on housing Open up the circular hole passed through for square shaft, cam is fitted respectively on the first half screws and pulling block, and pulling block is fixed with the second half screws Connection, one end of square shaft passes through from circular hole, and sequentially passes through the cam on the cam and pulling block on the first half screws, square shaft it is another One end and the output shaft of angle stroke cylinder are equipped with, pulling block left and right linear slide in the first half screws so that the first half screws and The second half screw closures or separation, so as to which leading screw and the first half screws, the second half screws engage or depart from.
- 2. the manual automatic switchover arrangement of clutch of pneumatic actuator as claimed in claim 1, it is characterised in that：Cam includes First cam, the second cam, the 3rd cam, open up square hole on the first cam, the second cam and the 3rd cam, the first half screws Rear and front end opens up chute, and the left end of the first half screws is hollow form, and the top of the left end of the first half screws opens up convex for first The equipped U-shaped hole of wheel, bottom open up the U-shaped hole being equipped with for the second cam, and pulling block includes cam and is equipped with block, the first linking arm and the The front end on the right side for being fitted in the equipped block of cam is fixed with after in one end of two linking arms, the first linking arm and the second linking arm respectively End, the other end of the first linking arm and the second linking arm slip over from the chute of the rear and front end of the first half screws, and with the second half Screw is fixedly connected, and cam is equipped with the U-shaped hole for opening up on block and being equipped with for the 3rd cam, and cam is equipped with block positioned at the first half screws Between the top and bottom of left end, the position of the first cam, the second cam and the square hole on the 3rd cam is corresponding.
- 3. the manual automatic switchover arrangement of clutch of pneumatic actuator as claimed in claim 2, it is characterised in that：First connection Arm and the second linking arm are fixedly connected by cylindrical pin with internal thread with the second half screws, the first linking arm, the second linking arm and convex The equipped block of wheel is integrally formed.
- 4. the manual automatic switchover arrangement of clutch of pneumatic actuator as claimed in claim 2 or claim 3, it is characterised in that：First Square hole on cam, the second cam and the 3rd cam is located at the eccentric part of each cam, the first cam, the second cam and the 3rd cam It is fitted on square shaft, the diameter for crossing square hole central point of the first cam and the diameter and the 3rd for crossing square hole centerline of the second cam The angle that cam crosses the diameter of square hole central point is 90 degree.
- 5. the manual automatic switchover arrangement of clutch of pneumatic actuator as claimed in claim 4, it is characterised in that：Angle stroke gas Cylinder is single-acting gas force open type cylinder, and output angle is less than or equal to 90 °.
- 6. the manual automatic switchover arrangement of clutch of pneumatic actuator as claimed in claim 5, it is characterised in that：A left side for housing Cover plate is fixedly mounted using screw in right both ends.
- 7. the manual automatic switchover arrangement of clutch of pneumatic actuator as claimed in claim 5, it is characterised in that：First circle is logical Guide sleeve is equipped with hole.
- 8. the manual automatic switchover arrangement of clutch of pneumatic actuator as claimed in claim 5, it is characterised in that：Opened on housing If the positioning hole for positioning square shaft, the upper end of square shaft is spacing using circlip.
- 9. the manual automatic switchover arrangement of clutch of pneumatic actuator as claimed in claim 5, it is characterised in that：Angle stroke gas Cylinder is fixedly connected with the casing by transition connecting plate.
- 10. the manual automatic switchover arrangement of clutch of pneumatic actuator as claimed in claim 9, it is characterised in that：Using spiral shell Angle stroke cylinder is fixedly connected in transition connecting plate by nail, and transition connecting plate is fixedly connected under housing using screw Side, and at circular hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510771660.4A CN105351602B (en) | 2015-11-13 | 2015-11-13 | The manual automatic switchover arrangement of clutch of pneumatic actuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510771660.4A CN105351602B (en) | 2015-11-13 | 2015-11-13 | The manual automatic switchover arrangement of clutch of pneumatic actuator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105351602A CN105351602A (en) | 2016-02-24 |
| CN105351602B true CN105351602B (en) | 2018-02-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510771660.4A Active CN105351602B (en) | 2015-11-13 | 2015-11-13 | The manual automatic switchover arrangement of clutch of pneumatic actuator |
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| Country | Link |
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| CN (1) | CN105351602B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106439186B (en) * | 2016-12-19 | 2018-11-09 | 天津精通控制仪表技术有限公司 | A kind of cam opening and closing type manual mechanism and implementation method |
| GB2564491A (en) | 2017-07-14 | 2019-01-16 | Biofold Fluidpower Ltd | Failsafe valve actuator |
| US10473233B2 (en) * | 2017-09-27 | 2019-11-12 | Tapcoenpro, Llc | Actuator for slide valves |
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| DE102011018718A1 (en) * | 2011-04-26 | 2012-10-31 | Eunha Machinery Industrial Co., Ltd. | Valve actuator e.g. pneumatic valve actuator for opening and closing valve, has valve actuating unit comprising eccentric cam that is in interaction with ring gear of planetary gear unit |
| CN102788192A (en) * | 2011-05-20 | 2012-11-21 | 浙江鼎锋流体自控设备有限公司 | Clutch type safe switchover hand wheel mechanism of pneumatic actuator |
| CN202769016U (en) * | 2012-09-24 | 2013-03-06 | 浙江欧斯特泵阀有限公司 | Shortcut type manual operation pneumatic switching device |
| CN203297411U (en) * | 2013-06-05 | 2013-11-20 | 上海宏尔特石化机电设备有限公司 | Manual pneumatic switchover device of pneumatic actuator |
| CN204573296U (en) * | 2014-12-30 | 2015-08-19 | 北京市阀门总厂(集团)有限公司 | The changeable many device for revolving and driving of hand-operated pneumatic |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10129143C1 (en) * | 2001-06-16 | 2002-06-13 | Haldex Brake Prod Gmbh | Pneumatic switch valve for vehicle suspension has control piston with cam surfaces to operate valve bodies |
-
2015
- 2015-11-13 CN CN201510771660.4A patent/CN105351602B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011018718A1 (en) * | 2011-04-26 | 2012-10-31 | Eunha Machinery Industrial Co., Ltd. | Valve actuator e.g. pneumatic valve actuator for opening and closing valve, has valve actuating unit comprising eccentric cam that is in interaction with ring gear of planetary gear unit |
| CN102788192A (en) * | 2011-05-20 | 2012-11-21 | 浙江鼎锋流体自控设备有限公司 | Clutch type safe switchover hand wheel mechanism of pneumatic actuator |
| CN202769016U (en) * | 2012-09-24 | 2013-03-06 | 浙江欧斯特泵阀有限公司 | Shortcut type manual operation pneumatic switching device |
| CN203297411U (en) * | 2013-06-05 | 2013-11-20 | 上海宏尔特石化机电设备有限公司 | Manual pneumatic switchover device of pneumatic actuator |
| CN204573296U (en) * | 2014-12-30 | 2015-08-19 | 北京市阀门总厂(集团)有限公司 | The changeable many device for revolving and driving of hand-operated pneumatic |
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| Publication number | Publication date |
|---|---|
| CN105351602A (en) | 2016-02-24 |
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Address after: No. 146, Huaan street, Xixia District, Yinchuan, the Ningxia Hui Autonomous Region Patentee after: Yinchuan British controlled Limited by Share Ltd Address before: Huaan Industrial Park, 750004 the Ningxia Hui Autonomous Region street, Yinchuan City Xixia District No. 146 Patentee before: Yinchuan Inauto Automation Co., Ltd. |
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