CN107676525B - Electric actuator for valve - Google Patents
Electric actuator for valve Download PDFInfo
- Publication number
- CN107676525B CN107676525B CN201711121298.1A CN201711121298A CN107676525B CN 107676525 B CN107676525 B CN 107676525B CN 201711121298 A CN201711121298 A CN 201711121298A CN 107676525 B CN107676525 B CN 107676525B
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- CN
- China
- Prior art keywords
- cam
- transmission cam
- transmission
- electric actuator
- drive
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
- F16K31/041—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor for rotating valves
- F16K31/042—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor for rotating valves with electric means, e.g. for controlling the motor or a clutch between the valve and the motor
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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
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
- F16K31/041—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor for rotating valves
- F16K31/043—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor for rotating valves characterised by mechanical means between the motor and the valve, e.g. lost motion means reducing backlash, clutches, brakes or return means
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electrically Driven Valve-Operating Means (AREA)
- Mechanically-Actuated Valves (AREA)
Abstract
The invention relates to an electric actuator for a valve, which comprises a shell, an output shaft arranged on a base at the lower side of the shell, a driving motor and a driving motor, wherein the driving motor is connected with the output shaft through a non-return mechanism and a speed reducing mechanism; the non-return mechanism comprises a first transmission cam connected to the driving motor; the second transmission cam is positioned below the first transmission cam; cam surfaces of the first transmission cam and the second transmission cam are mutually embedded; a first backstop; the second non-return piece is positioned below the first non-return piece and is wound on the periphery of the second transmission cam, and the second non-return piece and the second transmission cam can synchronously rotate and synchronously move along the up-down direction; one of the first check member and the second check member is provided with a concave portion, and the other is correspondingly provided with a convex portion; and the reset elastic piece is propped against between the second transmission cam and the speed reducing mechanism. The electric actuator for the valve has the advantages of stable working state and difficult environmental influence.
Description
Technical Field
The invention relates to an electric actuator product, in particular to an electric actuator for a valve.
Background
The electric actuator is widely applied to valve control in the fields of petroleum, natural gas, water treatment, ships and the like, and the application occasions have extremely high requirements on safety after power failure and performance stability after re-operation of the electric actuator, and the electric actuator is required to accurately drive the same movement direction no matter in forward and reverse directions after being started, accurately transmit the same torque, and accurately stop positioning when stopping. However, in practical use, for example, in ship use, the electric actuator may deviate from the actual preset working state due to factors such as ship shake, and how to lighten the star of the environmental factors on the working state of the electric actuator is a point that needs to be considered seriously when the electric actuator is designed.
Disclosure of Invention
The invention aims to solve the technical problem of how to reduce the influence of environmental factors on the working state of an electric actuator.
In order to solve the technical problems, the invention provides an electric actuator for a valve, which comprises a casing, an output shaft arranged on a base at the lower side of the casing, a driving motor, a non-return mechanism and a speed reducing mechanism, wherein the driving motor is connected with the output shaft through the non-return mechanism and the speed reducing mechanism so as to drive the output shaft to rotate; the non-return mechanism comprises a first transmission cam, a second transmission cam and a third transmission cam, wherein the first transmission cam is connected to the driving motor so that the driving motor can drive the first transmission cam to rotate; a second drive cam located below the first drive cam, the first drive cam having a first cam surface disposed circumferentially, the second drive cam having a second cam surface disposed circumferentially; the first cam surface and the second cam surface are mutually embedded, so that the second transmission cam can be pushed to move downwards when the first transmission cam rotates and synchronously drive the second transmission cam to drive along with the first transmission cam; a first backstop; the second non-return piece is positioned below the first non-return piece and is wound on the periphery of the second transmission cam, and the second non-return piece and the second transmission cam can synchronously rotate and synchronously move along the up-down direction; one of the first check piece and the second check piece is provided with a concave part, the other one of the first check piece and the second check piece is correspondingly provided with a convex part, and the second check piece can drive the concave part to be separated from the convex part when moving downwards; and the reset elastic piece is propped against between the second transmission cam and the speed reducing mechanism.
Preferably, the first check member is provided with the convex portion, the second check member is provided with the concave portion, and the first check member is provided on a motor support frame for supporting the driving motor.
Preferably, the second check member is provided with a plurality of recesses uniformly arranged in the circumferential direction.
Preferably, the second cam surface is provided with a first concave area and a second concave area, and the first cam surface is correspondingly provided with a first lug part and a second lug part; the first lug part is movably embedded in the first concave area, and the first transmission cam can push the cam surface of the second transmission cam in the first concave area through the first lug part when rotating, so that the second transmission cam can move downwards; the second lug part is movably embedded in the second concave area, and the second transmission cam can be pushed to be positioned on the cam surface of the second concave area by the second lug part when the first transmission cam rotates, so that the second transmission cam can rotate along with the first transmission cam.
Preferably, the periphery of the second transmission cam is provided with a plurality of transmission ends protruding outwards in the radial direction, and the lower end surface of the second non-return element is provided with a plurality of limit grooves corresponding to the plurality of transmission ends; each transmission end is clamped in the corresponding limiting groove.
Preferably, the driving motor is a double-shaft motor, a lower driving shaft of the driving motor is connected with the first transmission cam, and an upper driving shaft of the driving motor is connected with the manual wheel disc.
Preferably, the plurality of driving ends are uniformly distributed along the circumferential direction of the second driving cam.
By adopting the technical scheme, the invention can obtain the following technical effects:
1. by the configuration of the non-return mechanism, even if the electric actuator is slightly swayed due to the influence of the use environment, the driving motor of the electric actuator can not drive the second transmission cam to be separated from the first transmission cam, and the output shaft connected to the valve structure can not rotate to influence the state of the valve;
2. when the driving motor stops working, even if the driving motor still keeps transmission for a short period of time due to inertia, the second transmission cam is pushed by the reset elastic piece to reset upwards due to the existence of the reset elastic piece and drives the second non-return piece to move relative to the first non-return piece, so that the convex part can be clamped on the concave part, namely the action effect of the reset elastic and the action effect of the driving motor rotating due to inertia are offset, and further the influence of the driving motor on the accuracy of the valve position due to inertia can be avoided;
3. when the driving motor works, the first transmission cam pushes the cam surface of the second transmission cam in the second concave area through the second lug part to enable the second transmission cam to rotate along with the first transmission cam, namely, when the driving motor works actually, the first transmission cam and the second transmission cam are kept in a relatively static state, and the service life of the first transmission cam and the second transmission cam cannot be influenced by friction loss caused by relatively long-time movement of synchronous rotation.
Drawings
FIG. 1 shows a cross-sectional view of an electric actuator for a valve according to the present invention;
FIG. 2 is a cross-sectional view of the valve of the present invention with the electric actuator separated;
FIG. 3 is a cross-sectional view of the check mechanism of the electric actuator for a valve of the present invention;
FIG. 4 is a schematic view showing the relative positions of a first drive cam and a second drive cam of an electric actuator for a valve according to the present invention;
FIG. 5 is a schematic view showing the relative positions of a second driving cam and a second check member of the electric actuator for a valve according to the present invention
FIGS. 6 and 7 are schematic views showing an electric actuator for a valve according to the present invention in an inactive state and an active state, respectively;
fig. 8 is a schematic view showing an electric actuator for a valve according to another embodiment of the invention in an operating state.
Detailed Description
Referring to fig. 1 to 7, in a first embodiment, an electric actuator for a valve according to the present invention includes a housing 1, an output shaft 3 provided on a base 2 provided on a lower side of the housing 1, a drive motor 4, a non-return mechanism 5, and a reduction mechanism 6, wherein the drive motor 4 is connected to the output shaft 3 through the non-return mechanism 5 and the reduction mechanism 6 to drive the output shaft 3 to rotate; the non-return mechanism 5 includes: the first transmission cam 9 is connected to the driving motor 4, so that the driving motor 4 can drive the first transmission cam 9 to rotate; a second transmission cam 10 located below the first transmission cam 9, and the first transmission cam 9 has a first cam surface provided in the circumferential direction, and the second transmission cam 10 has a second cam surface provided in the circumferential direction; the first cam surface and the second cam surface are mutually embedded, so that the first transmission cam 9 can push the second transmission cam 10 to move downwards when rotating and synchronously drive the second transmission cam 10 to transmit along with the second transmission cam; a first backstop 11; the second backstop 12 is positioned below the first backstop 11 and is wound on the periphery of the second transmission cam 10, and the second backstop 12 and the second transmission cam 10 can synchronously rotate and synchronously move along the up-down direction; the second non-return element 12 is provided with a concave part 12A, the first non-return element 11 is correspondingly provided with a convex part, and the second non-return element 12 can drive the concave part to be separated from the convex part when moving downwards; the reset elastic piece 13 is propped against between the second transmission cam 10 and the speed reducing mechanism 6.
The output shaft 3 is used to connect a valve structure (such as a butterfly valve) to adjust the state of the valve structure. The reduction mechanism 6 may be a multi-stage planetary reduction mechanism, which is well known in the art and will not be described in detail. The return elastic member 13 may be a spring. In the first embodiment, the first check member 11 is disposed on the motor support frame 8 for supporting the driving motor 4. The second check 12 is provided with a plurality of recesses 12A uniformly arranged in the circumferential direction. In this embodiment, the motor support 8 has a cylindrical cavity extending in the up-down direction, the driving motor 4 is supported on the motor support 8, and the first transmission cam 9, the second transmission cam 10 and the second non-return element 12 are rotatably disposed in the cavity of the motor support 8. The side wall of the accommodating cavity of the motor supporting frame 8 can form a ball structure, so that the first transmission cam 9 and the second non-return element 12 can rotate more smoothly.
In the first embodiment, the second cam surface has the first concave region 10A and the second concave region 10B thereon, and the first cam surface is correspondingly provided with the first bump portion 9A and the second bump portion 9B thereon; the first bump part 9A is movably embedded in the first concave area 10A, and the first transmission cam 9 can push the cam surface of the second transmission cam 10 positioned in the first concave area 10A through the first bump part 9A when in transmission, so that the second transmission cam 10 can move downwards; the second bump portion 9B is movably embedded in the second recess 10B, and the second transmission cam 10 can be pushed by the second bump portion 9B to be located on the cam surface of the second recess 10B when the first transmission cam 9 is in transmission, so that the second transmission cam 10 can rotate along with the first transmission cam 9.
In the first embodiment, the outer periphery of the second transmission cam 10 has a plurality of transmission ends 10C protruding radially outward, and the lower end surface of the second backstop 12 has a plurality of limit grooves 12B corresponding to the plurality of transmission ends 10C; each driving end 10C is clamped in the corresponding limiting groove 12B. With this arrangement, the second transmission cam 10 can rotate with the second backstop 12 when rotating, and when the convex part of the first backstop 11 is clamped with the concave part 12A, the second transmission cam 10 can not move with the second backstop 12. In this embodiment, the plurality of driving ends 10C are uniformly arranged at predetermined intervals along the circumferential direction of the second driving cam 10, so as to more stably drive the second backstop 12 to move.
In the first embodiment, the driving motor 4 is a biaxial motor, the lower end driving shaft of which is connected to the first transmission cam 9, and the upper end driving shaft of which is connected to the manual wheel 7. By configuring the manual wheel disc 7, when the electric actuator for the valve cannot work normally, the position of the output shaft 3 can be controlled manually through the manual wheel disc 7.
With reference to the drawings, the specific working mode of the electric actuator for the valve of the invention is as follows: when the driving motor 4 works, the first transmission cam 9 is driven to rotate, and after the first transmission cam 9 rotates for a certain angle, the second transmission cam 10 is pushed to move downwards so as to compress the reset elastic piece 13. When the second transmission cam 10 moves downwards for a certain distance, the concave part 12A is separated from the convex part of the first backstop 11, and the first transmission cam 9 can drive the second transmission cam 10 to rotate. The second transmission cam 10 can drive the speed reducing mechanism 6 to work when rotating, and then drive the output shaft 3 to rotate. When the drive motor 4 stops operating, the reset elastic member 13 pushes the second transmission cam 10 upward, so that the second transmission cam 10 rotates to an initial state with respect to the first transmission cam 9, while the convex portion of the first backstop 11 is fitted in the concave portion 12A. Through the design, the first transmission cam 9 can drive the second transmission cam 10 to move downwards and rotate along with the second transmission cam under the condition that the first transmission cam 9 needs to rotate by a larger angle, and the second transmission cam 10 cannot be rotated by slight shaking, so that the stability of the position of the valve connected to the output shaft 3 is ensured.
The electric actuator for a valve according to the present invention is not limited to the above embodiment, and in another example, a concave portion may be disposed on the first stopper 11 and a convex portion may be disposed on the second stopper 12, with reference to fig. 8. Other characteristics of the electric actuator for a valve of this embodiment, which are not mentioned, may be the same as those of the foregoing embodiments, and thus will not be described again.
The present invention is not limited to the above embodiments, and any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention falls within the scope of the technical solution of the present invention.
Claims (7)
1. An electric actuator for a valve is provided with a casing (1), an output shaft (3) arranged on a base (2) at the lower side of the casing (1), a driving motor (4), a non-return mechanism (5) and a speed reducing mechanism (6), wherein the driving motor (4) is connected to the output shaft (3) through the non-return mechanism (5) and the speed reducing mechanism (6) so as to drive the output shaft (3) to rotate; characterized in that the non-return mechanism (5) comprises:
the first transmission cam (9) is connected to the driving motor (4) so that the driving motor (4) can drive the first transmission cam (9) to rotate;
a second transmission cam (10) located below the first transmission cam (9), the first transmission cam (9) having a first cam surface disposed in a circumferential direction, the second transmission cam (10) having a second cam surface disposed in a circumferential direction; the first cam surface and the second cam surface are mutually embedded, so that the second transmission cam (10) can be pushed to move downwards when the first transmission cam (9) rotates, and the second transmission cam (10) is synchronously driven to drive along with the first transmission cam;
a first backstop (11);
the second non-return piece (12) is positioned below the first non-return piece (11) and is wound on the periphery of the second transmission cam (10), and the second non-return piece (12) and the second transmission cam (10) can synchronously rotate and synchronously move along the up-down direction;
one of the first non-return piece (11) and the second non-return piece (12) is provided with a concave part, the other one is correspondingly provided with a convex part, and the second non-return piece (12) can drive the concave part to be separated from the convex part when moving downwards;
and the reset elastic piece (13) is propped against between the second transmission cam (10) and the speed reducing mechanism (6).
2. The electric actuator for a valve according to claim 1, wherein the first check member (11) is provided with the convex portion, the second check member (12) is provided with the concave portion (12A), and the first check member (11) is provided on a motor support frame (8) for supporting the drive motor (4).
3. The electric actuator for a valve according to claim 2, wherein the second check member (12) is provided with a plurality of recesses (12A) uniformly arranged in the circumferential direction.
4. The electric actuator for a valve according to claim 1, wherein the second cam surface has a first concave area (10A) and a second concave area (10B), and the first cam surface has a first bump portion (9A) and a second bump portion (9B) disposed thereon; the first protruding block part (9A) is movably embedded in the first concave area (10A), and the first transmission cam (9) can push the second transmission cam (10) to be positioned on the cam surface of the first concave area (10A) through the first protruding block part (9A) when rotating, so that the second transmission cam (10) can move downwards; the second protruding block part (9B) is movably embedded in the second concave area (10B), and the second transmission cam (10) can be pushed to be positioned on the cam surface of the second concave area (10B) by the second protruding block part (9B) when the first transmission cam (9) rotates, so that the second transmission cam (10) can rotate along with the first transmission cam (9).
5. The electric actuator for a valve according to claim 1, wherein the outer periphery of the second transmission cam (10) has a plurality of transmission ends (10C) protruding radially outward, and the lower end surface of the second backstop (12) has a plurality of limit grooves (12B) corresponding to the plurality of transmission ends (10C); each driving end (10C) is clamped in the corresponding limiting groove (12B).
6. The electric actuator for a valve according to claim 1, wherein the drive motor (4) is a biaxial motor, a lower end drive shaft of which is connected to the first transmission cam (9), and an upper end drive shaft of which is connected to the manual wheel (7).
7. The electric actuator for a valve according to claim 5, wherein the plurality of driving ends (10C) are uniformly arranged along the circumferential direction of the second driving cam (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711121298.1A CN107676525B (en) | 2017-11-14 | 2017-11-14 | Electric actuator for valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711121298.1A CN107676525B (en) | 2017-11-14 | 2017-11-14 | Electric actuator for valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107676525A CN107676525A (en) | 2018-02-09 |
| CN107676525B true CN107676525B (en) | 2023-08-01 |
Family
ID=61148994
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711121298.1A Active CN107676525B (en) | 2017-11-14 | 2017-11-14 | Electric actuator for valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107676525B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102019118833B4 (en) | 2019-07-11 | 2023-01-19 | Schischek GmbH | Fail-safe actuator and assembly |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1472200A (en) * | 1966-01-25 | 1967-03-10 | Reed Roller Bit Co | Mechanical tool including screwdriver |
| JPH1144369A (en) * | 1997-05-27 | 1999-02-16 | Saginomiya Seisakusho Inc | Motor-driven four-way valve |
| JP2001153253A (en) * | 1999-11-29 | 2001-06-08 | Sankyo Seiki Mfg Co Ltd | Valve driving system |
| CN1662763A (en) * | 2002-06-20 | 2005-08-31 | 株式会社开滋 | Actuator for valves |
| JP2007187247A (en) * | 2006-01-13 | 2007-07-26 | Ntn Corp | Two-way clutch unit |
| CN101063303A (en) * | 2006-04-28 | 2007-10-31 | 王明根 | Novel gate hoist |
| JP2008032196A (en) * | 2006-08-01 | 2008-02-14 | Nidec Sankyo Corp | Device for opening and closing valve body |
| CN107035787A (en) * | 2017-05-31 | 2017-08-11 | 郭克亚 | A kind of wedge block type clutch |
| TW201737837A (en) * | 2016-04-26 | 2017-11-01 | 第一傳動科技股份有限公司 | Power-driven table stand, coupling and power-driven table using the stand |
-
2017
- 2017-11-14 CN CN201711121298.1A patent/CN107676525B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1472200A (en) * | 1966-01-25 | 1967-03-10 | Reed Roller Bit Co | Mechanical tool including screwdriver |
| JPH1144369A (en) * | 1997-05-27 | 1999-02-16 | Saginomiya Seisakusho Inc | Motor-driven four-way valve |
| JP2001153253A (en) * | 1999-11-29 | 2001-06-08 | Sankyo Seiki Mfg Co Ltd | Valve driving system |
| CN1662763A (en) * | 2002-06-20 | 2005-08-31 | 株式会社开滋 | Actuator for valves |
| JP2007187247A (en) * | 2006-01-13 | 2007-07-26 | Ntn Corp | Two-way clutch unit |
| CN101063303A (en) * | 2006-04-28 | 2007-10-31 | 王明根 | Novel gate hoist |
| JP2008032196A (en) * | 2006-08-01 | 2008-02-14 | Nidec Sankyo Corp | Device for opening and closing valve body |
| TW201737837A (en) * | 2016-04-26 | 2017-11-01 | 第一傳動科技股份有限公司 | Power-driven table stand, coupling and power-driven table using the stand |
| CN107035787A (en) * | 2017-05-31 | 2017-08-11 | 郭克亚 | A kind of wedge block type clutch |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107676525A (en) | 2018-02-09 |
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