CN201373157Y - Electric actuator and valve position current signal transducer device - Google Patents
Electric actuator and valve position current signal transducer device Download PDFInfo
- Publication number
- CN201373157Y CN201373157Y CN200920002190U CN200920002190U CN201373157Y CN 201373157 Y CN201373157 Y CN 201373157Y CN 200920002190 U CN200920002190 U CN 200920002190U CN 200920002190 U CN200920002190 U CN 200920002190U CN 201373157 Y CN201373157 Y CN 201373157Y
- Authority
- CN
- China
- Prior art keywords
- current signal
- output shaft
- generation device
- signal generation
- electric actuator
- 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.)
- Expired - Lifetime
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Abstract
The utility model discloses a valve electric actuator and a valve position current signal generating device thereof. The valve position current signal generating device comprises a circuit board, a current transducer, a regulation resistance, a rotating shaft, a chuck for joining a position limiting cam, a driving gear, an output shaft and a driven gear, wherein the current transducer is fixed on the upper end surface of the circuit board, and the regulation resistance is fixed on the upper end surface of the circuit board and extends upwards to form an output shaft, and the rotating shaft vertically passes through the circuit board in a rotation way, and the chuck for joining the position limiting cam is fixedly connected with the lower end of the rotating shaft, and the driving gear is sleeved on the upper shaft body of the rotating shaft, and the output shaft is sleeved on the regulation resistance, and the driven gear is engaged with the driving gear; and a pre-determined transmission ratio is arranged between the driving gear and the driven gear.
Description
Technical field
The utility model relates to a kind of valve electric actuator, especially relates to the valve location current signal generation device that valve location is carried out the output of equal proportion current signal.
Background technique
In general, electric actuator is a kind of valve actuator commonly used in the industrial automation control system.
In the running of electric actuator, need the upwards current signal of level controlling system equal proportion output valve position, but at present common current signal all is by being arranged on potentiometer in the electric actuator signal that has a resistance, be converted to current signal by control system then and import upper-position unit again into, can only provide resistance signal for the final controlling element of non control system.
The model utility content
In order to solve the aforementioned problems in the prior, a purpose of the present utility model provides a kind of valve location current signal generation device of electric actuator, its potentiometer and current transducer are set to one, also can not realize to the upper-position unit output current signal under the situation of control system having even make.
Another purpose of the present utility model provides a kind of electric actuator, and it has valve location current signal generation device of the present utility model.
For realizing above-mentioned purpose of the present utility model, the utility model provides a kind of valve location current signal generation device of valve electric actuator, described valve location current signal generation device comprises a circuit board, one is fixed on the current transducer on the described circuit board upper-end surface, one is fixed on the upper-end surface of described circuit board and extends upward the potentiometer of an output shaft, one vertically runs through the rotating shaft of described circuit board rotationally, at the affixed position limit cam connection chuck of the lower end of described rotating shaft, the sheathed actuation gear of the top of described rotating shaft axis body and be sheathed on described potentiometer output shaft and with the driven gear of described actuation gear engagement, have predetermined velocity ratio between wherein said actuation gear and the described driven gear.
According to technical conceive of the present utility model, the lower end of described rotating shaft is housed in the axle sleeve, and described axle sleeve vertically runs through by a spring sheet and is fixed in described circuit board, and described position limit cam connects the lower end surface of being fixed in described axle sleeve with chuck.
According to technical conceive of the present utility model, be disposed with first check ring, first pad and first spring pressuring plate that is set in the described rotating shaft below the described actuation gear from the top down, be disposed with second check ring and second pad below described actuation gear from bottom to top, the top axis body of described rotating shaft is provided with first annular groove and second annular groove that is used to be provided with described first check ring and described second check ring.
According to technical conceive of the present utility model, also be fixed with an angle indicator panel on the top of described rotating shaft.
According to technical conceive of the present utility model, described valve location current signal generation device comprises that also one one end is sheathed on the gear retention tab that the other end of described rotating shaft is sheathed on described output shaft.
According to technical conceive of the present utility model, fixed cover is provided with an output shaft axle sleeve on the output shaft of described potentiometer, the upper end outer circumferential face of described output shaft axle sleeve is formed with outside thread, the lower end of described output shaft axle sleeve is formed with positive stop lug boss, described driven gear is set on the described output shaft axle sleeve and between described positive stop lug boss and described driven gear and is provided with the 3rd spring pressuring plate, also is bolted with a tapped pressure ring on the upper end of described output shaft axle sleeve.
According to technical conceive of the present utility model, described valve location current signal generation device comprises that also one is fixed in described circuit board and fixedly uses column from what described circuit board extended downwards.
In order to realize above-mentioned purpose of the present utility model, the utility model also provides a kind of electric actuator, and described electric actuator comprises any valve location current signal generation device that the utility model provides.
Compared with prior art, the beneficial effects of the utility model are: valve location current signal generation device compact structure of the present utility model, with low cost, be suitable for producing in batches, easy for installation, adjust easily, be user-friendly to and safeguard, in addition, with current transducer and being made of one of potentiometer, under the situation of non control system, also can realize current signal output, by the velocity ratio between actuation gear and the driving gear in this device of adjustment, can make potentiometer under most situation, can both full scale export (300 degree) simultaneously.
Description of drawings
Fig. 1 is the decomposing state schematic perspective view of the utility model valve location current signal generation device.
Fig. 2 is the assembled state schematic perspective view of the utility model valve location current signal generation device.
Embodiment
The utility model is described in further detail below in conjunction with the accompanying drawings and the specific embodiments.To refer to identical or similar parts with identical or similar reference character as far as possible in this manual.
Referring to Fig. 1 and Fig. 2, the valve location current signal generation device of valve electric actuator of the present utility model comprises that circuit board 5, potentiometer 18, current transducer 19, rotating shaft 7, position limit cam connect with chuck 3, actuation gear 11 and driven gear 23.
Rotating shaft 7 vertically runs through circuit board 5 rotationally.According to preferred version, the lower end of rotating shaft 7 is housed in the axle sleeve 4, and axle sleeve 4 vertically runs through by a spring sheet 6 and is fixed in the circuit board 5, and the position limit cam connects the lower end surface of being fixed in axle sleeve 4 with chuck 3.
The position limit cam connects the lower end that is fixed in rotating shaft 7 with chuck 3.The connection of position limit cam can be made of plastics and be stuck on the position limit cam (figure does not show) of electric actuator with chuck 3, rotation angle and position limit cam that the position limit cam connects with chuck 3 are consistent, and the position of position limit cam and valve is consistent.
According to preferred version, valve location current signal generation device of the present utility model comprises that also one one end is sheathed on the gear retention tab 14 that rotating shaft 7 other ends are sheathed on output shaft 182.Gear retention tab 14 can guarantee that the engagement between driven gear 23 and the actuation gear 11 is good.In order to keep gear retention tab 14, can in rotating shaft 7, form the 3rd annular groove 73, and the 3rd check ring 15 is set in the 3rd annular groove 73 moves on the gear retention tab 14 preventing.
According to the technical solution of the utility model, can also be fixed with an angle indicator panel 16 on the top of rotating shaft 7 by screw.
For valve location current signal generation device of the present utility model is fixed in the electric actuator, below circuit board 5, be fixed with the fixing column 17 of using that extends from circuit board 5 downwards by screw 20.
The utility model also provides a kind of electric actuator, and described electric actuator comprises any valve location current signal generation device described in the utility model.
Hereinafter will simply describe basic functional principle of the present utility model.
Valve location current signal generation device of the present utility model is fixedly mounted on electric actuator inside by fixing with column 17, the connection of position limit cam is stuck on the position limit cam of electric actuator with chuck 3, rotation angle and position limit cam that the position limit cam connects with chuck 3 are consistent, and the position of position limit cam and valve is consistent.When the position limit cam connects with chuck 3 rotations, transmission by rotating shaft 7, actuation gear 11, driven gear 23, the output shaft 182 that drives potentiometer 18 rotates, therefore, the rotation angle of the output shaft 182 of potentiometer 18 has reflected the angle of valve location, shows as the size of resistance, be converted to size of current (normally 4-20mA) by current transducer, thereby reflected the angle of valve location.
Owing in total travel, make the corner maximum of the output shaft 182 of potentiometer 18, can improve the stable of control accuracy and system.Because the final controlling element applied environment is varied, valve location current signal generation device of the present utility model can realize that different input angles can both reach maximum potentiometer output angle by adjusting the velocity ratio between driving gear 11 and the driven gear 23.
In addition, be not rigidly connected between the output shaft 182 of driven gear 11 and potentiometer 18, during proper functioning, because the driving force that potentiometer 18 needs is very little, can be considered between the output shaft 182 of driven gear 11 and potentiometer 18 and be rigidly connected, can guarantee the linearity of signal output.But adjusting potentiometer during zero point, as long as rotate the output shaft 182 of potentiometer 18 with certain power (above the frictional force between the output shaft 182 of driven gear 11 and potentiometer 18), just can change the relative position between the output shaft 182 of driven gear 11 and potentiometer 18, the position of valve does not but change, thereby realizes the purpose that set zero point.
Above-described only is preferable possible embodiments of the present utility model; described embodiment is not in order to limit scope of patent protection of the present utility model; therefore the equivalent structure done of every utilization specification of the present utility model and accompanying drawing content changes, and in like manner all should be included in the protection domain of the present utility model.
Claims (8)
1. the valve location current signal generation device of a valve electric actuator, it is characterized in that, described valve location current signal generation device comprises a circuit board, one is fixed on the current transducer on the described circuit board upper-end surface, one is fixed on the upper-end surface of described circuit board and extends upward the potentiometer of an output shaft, one vertically runs through the rotating shaft of described circuit board rotationally, at the affixed position limit cam connection chuck of the lower end of described rotating shaft, the sheathed actuation gear of the top of described rotating shaft axis body and be sheathed on described potentiometer output shaft and with the driven gear of described actuation gear engagement, have predetermined velocity ratio between wherein said actuation gear and the described driven gear.
2. the valve location current signal generation device of valve electric actuator as claimed in claim 1, it is characterized in that, the lower end of described rotating shaft is housed in the axle sleeve, described axle sleeve vertically runs through by a spring sheet and is fixed in described circuit board, and described position limit cam connects the lower end surface of being fixed in described axle sleeve with chuck.
3. the valve location current signal generation device of valve electric actuator as claimed in claim 1, it is characterized in that, be disposed with first check ring, first pad and first spring pressuring plate that is set in the described rotating shaft below the described actuation gear from the top down, be disposed with second check ring and second pad below described actuation gear from bottom to top, the top axis body of described rotating shaft is provided with first annular groove and second annular groove that is used to be provided with described first check ring and described second check ring.
4. the valve location current signal generation device of valve electric actuator as claimed in claim 1 is characterized in that, also is fixed with an angle indicator panel on the top of described rotating shaft.
5. the valve location current signal generation device of valve electric actuator as claimed in claim 1, it is characterized in that described valve location current signal generation device comprises that also one one end is sheathed on the gear retention tab that the other end of described rotating shaft is sheathed on described output shaft.
6. the valve location current signal generation device of valve electric actuator as claimed in claim 5, it is characterized in that, fixed cover is provided with an output shaft axle sleeve on the output shaft of described potentiometer, the upper end outer circumferential face of described output shaft axle sleeve is formed with outside thread, the lower end of described output shaft axle sleeve is formed with positive stop lug boss, described driven gear is set on the described output shaft axle sleeve and between described positive stop lug boss and described driven gear and is provided with the 3rd spring pressuring plate, also is bolted with a tapped pressure ring on the upper end of described output shaft axle sleeve.
7. the valve location current signal generation device of valve electric actuator as claimed in claim 1, it is characterized in that described valve location current signal generation device comprises that also one is fixed in described circuit board and fixedly uses column from what described circuit board extended downwards.
8. an electric actuator is characterized in that, described electric actuator comprises described any valve location current signal generation device of claim 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920002190U CN201373157Y (en) | 2009-02-02 | 2009-02-02 | Electric actuator and valve position current signal transducer device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920002190U CN201373157Y (en) | 2009-02-02 | 2009-02-02 | Electric actuator and valve position current signal transducer device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201373157Y true CN201373157Y (en) | 2009-12-30 |
Family
ID=41499238
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920002190U Expired - Lifetime CN201373157Y (en) | 2009-02-02 | 2009-02-02 | Electric actuator and valve position current signal transducer device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201373157Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103743416A (en) * | 2013-01-20 | 2014-04-23 | 盐城纺织职业技术学院 | High-precision valve opening sensor |
| CN114439997A (en) * | 2021-12-31 | 2022-05-06 | 上海自动化仪表有限公司 | Valve position transmitter structure for nuclear power |
-
2009
- 2009-02-02 CN CN200920002190U patent/CN201373157Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103743416A (en) * | 2013-01-20 | 2014-04-23 | 盐城纺织职业技术学院 | High-precision valve opening sensor |
| CN114439997A (en) * | 2021-12-31 | 2022-05-06 | 上海自动化仪表有限公司 | Valve position transmitter structure for nuclear power |
| CN114439997B (en) * | 2021-12-31 | 2023-12-19 | 上海自动化仪表有限公司 | Valve position transducer structure for nuclear power |
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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 | ||
| CX01 | Expiry of patent term |
Granted publication date: 20091230 |