CN110594473A - Flow control device and method for realizing stable operation of valve positioner - Google Patents
Flow control device and method for realizing stable operation of valve positioner Download PDFInfo
- Publication number
- CN110594473A CN110594473A CN201910950814.4A CN201910950814A CN110594473A CN 110594473 A CN110594473 A CN 110594473A CN 201910950814 A CN201910950814 A CN 201910950814A CN 110594473 A CN110594473 A CN 110594473A
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- flow
- flow control
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- air
- control device
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- 238000000034 method Methods 0.000 title claims abstract description 9
- 230000001105 regulatory effect Effects 0.000 claims description 29
- 238000009434 installation Methods 0.000 claims description 13
- 238000007789 sealing Methods 0.000 claims description 12
- 230000006835 compression Effects 0.000 claims description 7
- 238000007906 compression Methods 0.000 claims description 7
- 230000008859 change Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000008713 feedback mechanism Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
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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
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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
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/04—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having cylindrical surfaces; Packings therefor
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Flow Control (AREA)
Abstract
The invention discloses a flow control device and a method for realizing stable operation of a valve positioner, wherein the flow control device comprises a positioner main body, an electrical converter and a flow adjusting rod, wherein the electrical converter is arranged in the positioner main body, the positioner main body is provided with an adjusting mounting hole, and an air source output by the electrical converter is output to an air receiving device through an air outlet channel of the positioner main body; the adjusting and mounting hole is communicated with an air outlet channel on the positioner main body; the flow adjusting rod is arranged in the adjusting mounting hole, an air flow adjusting port is arranged on the flow adjusting rod, and the air flow adjusting port is used for being matched with the inner wall of the adjusting mounting hole to adjust the output air flow of the air outlet hole. The gas flow area between the gas flow adjusting port on the flow adjusting rod and the gas outlet channel is adjusted, namely, the gas outlet hole is adjusted to be small by rotating the button, and the gas flow is adjusted to be small before gas outlet, so that the gas flow adjusting output of the gas outlet is realized, a driving gas source is provided for the small-capacity actuator, and the stable work of the small-capacity actuator is ensured.
Description
Technical Field
The invention relates to the technical field of electric valve positioners, in particular to a flow control device and a method for realizing stable operation of a valve positioner.
Background
The electric valve positioner mainly comprises a feedback mechanism, an electric converter and a circuit main board, and the whole control loop is controlled by two lines of 4-20 mA signals. And transmitting the 4-20 mA signal of the analog quantity to a microprocessor, comparing the signal with the feedback of a feedback mechanism, carrying out control calculation (primary control) by the microprocessor according to the size and the direction of the deviation, and sending an electric control instruction to the electric converter to open and close the electric converter. The electric converter corresponds to the increment of the output pressure of the pneumatic amplifier according to the width of the control instruction pulse, the output of the pneumatic amplifier is fed back to the inner control loop, the comparison operation (secondary control) is carried out with the operation result of the microprocessor again, signals are output to the actuating mechanism through the two-stage control, and the change of the air pressure in the actuating mechanism controls the stroke of the valve. When the control deviation is large, the electric converter sends out a wide-amplitude pulse signal, so that the positioner outputs a continuous signal, and the signal pressure of the actuator is greatly changed to drive the valve to rapidly act; as the valve approaches the desired position, the difference between the commanded position and the measured position becomes smaller, and the electrical converter outputs a pulse signal with a smaller pulse width that continuously changes to the signal pressure of the actuator with a small amplitude, so that the action of the actuator approaching the new commanded position is gentle. When the valve reaches the required position, the electric converter has no pulse output, and the output of the positioner is kept to be zero, so that the valve is stabilized at a certain position and is immovable, and the adjustment and control of the valve are realized.
When the electric valve positioner works, the set gas flow is output to the actuator through the gas outlet to drive the actuator, so that the opening of the valve is driven to be adjusted.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. To this end, an object of the present invention is to provide a flow control device and a method for achieving stable operation of a valve positioner.
In one aspect, to achieve the above object, according to an embodiment of the present invention, a flow control device includes:
the gas outlet device comprises a locator main body, wherein an adjusting and mounting hole is formed in the locator main body and is communicated with a gas outlet channel on the locator main body;
the electrical converter is arranged in the positioner main body, and an air source output by the electrical converter is output to the air receiving equipment through the air outlet channel;
the flow adjusting rod is arranged in the adjusting mounting hole, an air flow adjusting port is arranged on the flow adjusting rod, and the air flow adjusting port is used for being matched with the inner wall of the adjusting mounting hole to adjust the output air flow of the air outlet hole.
Further, according to an embodiment of the present invention, the flow control device further includes:
a compression screw;
one side of flow control mounting hole is equipped with the housing screw hole, the housing screw sets up the housing screw hole, and will the flow control pole compresses tightly fixedly toward the vertical direction.
Further, according to an embodiment of the present invention, the flow control device further includes:
an upper fixing screw and a lower fixing screw;
still be equipped with fixed screw hole on one side of locator main part, fixed screw hole with adjust the mounting hole intercommunication, the set screw sets up from top to bottom in the fixed screw hole, with will flow control pole compresses tightly fixedly toward the horizontal direction.
Further, according to an embodiment of the present invention, an annular fixing groove is further disposed on the flow rate adjusting rod, and one end of the upper and lower fixing screws is disposed in the annular fixing groove to compress and fix the flow rate adjusting rod in the horizontal direction.
Further, according to an embodiment of the present invention, the flow control device further includes:
a seal ring;
the flow adjusting device is characterized in that an annular sealing groove is further formed in the flow adjusting device, and the sealing ring is arranged in the annular sealing groove to seal a gap between the flow adjusting rod and the adjusting mounting hole.
Further, according to an embodiment of the present invention, the top end of the flow regulating rod is further provided with a regulating control groove.
Further, according to an embodiment of the present invention, the flow rate control device further includes a flow rate display device provided on the positioner body and communicating with the air outlet.
Further, according to an embodiment of the present invention, a gas flow amount detecting end of the flow display device is disposed between the gas amount adjusting port and the gas outlet port.
Further, according to an embodiment of the present invention, the flow control device further includes a flow control installation joint through which the adjustment installation hole, the compression screw hole, and the fixing screw hole are respectively provided on the positioner body.
In another aspect, the present invention further provides a method for implementing stable operation of a valve positioner based on the above flow control apparatus, including the steps of:
connecting the air outlet of the flow control device to an air receiving device;
and adjusting the air volume output from the air outlet of the flow control device to the air receiving equipment by rotating and adjusting the flow adjusting rod according to the working air volume of the air receiving equipment.
According to the flow control device provided by the embodiment of the invention, the adjusting mounting hole is formed in the positioner main body, and the adjusting mounting hole is communicated with the air outlet channel on the positioner main body; the gas source output by the electrical converter is output to the gas receiving equipment through the gas outlet channel of the positioner main body; the flow adjusting rod is arranged in the adjusting mounting hole, an air flow adjusting port is arranged on the flow adjusting rod, and the air flow adjusting port is used for being matched with the inner wall of the adjusting mounting hole to adjust the output air flow of the air outlet hole. The gas flow area between the gas flow adjusting port on the flow adjusting rod and the gas outlet channel is adjusted, namely, the gas outlet hole is adjusted to be small by rotating the button, and the gas flow is adjusted to be small before gas outlet, so that the gas flow adjusting output of the gas outlet is realized, a driving gas source is provided for the small-capacity actuator, and the stable work of the small-capacity actuator is ensured.
Drawings
FIG. 1 is a schematic diagram of a valve positioner according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view and an exploded view of a valve positioner according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a partial structure at A of FIG. 1 according to an embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view taken along the line C-C of FIG. 3 according to an embodiment of the present invention;
fig. 5 is a method for achieving stable operation of a valve positioner according to an embodiment of the present invention.
Reference numerals:
a positioner main body 10;
a flow control mount fitting 101;
adjusting the mounting hole 1011;
the compression screw holes 1012;
a fixing screw hole 1013;
an adjustment mounting hole 102;
an air inlet 103;
an air outlet 104;
an air outlet channel 105;
an inner gas outlet 106;
an air intake inner port 107;
a flow rate adjusting lever 20;
a gas amount adjusting port 201;
an annular seal groove 202;
an annular fixing groove 203;
an adjustment control groove (adjustment head) 204;
a seal ring 30;
a flow rate display device 40;
an airflow volume detection end 401;
a hold-down screw 50;
upper and lower set screws 60
An electrical converter 70.
The objects, features and advantages of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
In one aspect, referring to fig. 1 to 4, an embodiment of the present invention provides a flow control device, including: the gas flow rate adjusting device comprises a locator main body 10, an electric converter 70 and a flow rate adjusting rod 20, wherein an adjusting installation hole 1011 is formed in the locator main body 10, and the adjusting installation hole 1011 is communicated with a gas outlet channel 105 on the locator main body 10; as shown in fig. 1 and 3, the positioner output gas is output to an actuator (e.g., a cylinder) through an outlet 104 to perform displacement control on the actuator, and in some small-capacity devices, an excessive flow output may cause the small-capacity device to fail to operate stably. In this case, the gas output from the gas outlet 104 needs to be reduced before being output to a small capacity facility. So that the small-capacity equipment can normally and stably work. As shown in fig. 3 and 4, in the embodiment of the present invention, an adjusting installation hole 1011 is provided in the positioner body 10, and the installation adjusting hole is communicated with the air outlet channel 105 on the positioner body 10, so that the air flow on the air outlet channel 105 can be adjusted and controlled through the installation adjusting hole.
The electrical converter 70 is installed in the positioner main body, and the air source output by the electrical converter 70 is output to the air receiving equipment through the air outlet channel 105; as shown in fig. 2, the electrical converter 60 is installed in the positioner body 10, and the air inlet 101 and the air inlet 103 of the electrical converter 60 are communicated with each other, so that the input air is delivered to the electrical converter 60 through the air inlet 103, and is output to an external actuator (e.g., a cylinder) from the air outlet inner 106 and the air outlet channel 105 after being subjected to air pressure regulation by the electrical converter 70, thereby driving the external actuator.
The flow regulating rod 20 is arranged in the regulating mounting hole 1011, the flow regulating rod 20 is provided with an air quantity regulating port 201, and the air quantity regulating port 201 is used for regulating the output air flow of the air outlet hole by matching with the inner wall of the regulating mounting hole 1011. As shown in fig. 3, the flow rate adjustment lever 20 is disposed on the air outlet passage 105 of the positioner body 10 through the adjustment mounting hole 1011, and the outer wall of the flow rate adjustment lever 20 and the inside of the adjustment mounting hole 1011 are fitted to each other to prevent gas from being discharged from the adjustment mounting hole 1011. In addition, since the flow regulating rod 20 is disposed on the gas outlet channel 105, the gas outlet channel 105 can be blocked, and the flow of the output gas from the gas outlet 104 can be regulated by regulating the gas flow area between the gas amount regulating port 201 on the flow regulating rod 20 and the gas outlet channel 105.
According to the flow control device provided by the embodiment of the invention, the adjusting installation hole 1011 is arranged in the positioner main body 10, and the adjusting installation hole 1011 is communicated with the air outlet channel 105 on the positioner main body 10; the air source output by the electrical converter 70 is output to the air receiving equipment through the air outlet channel 105 of the positioner body 10; the flow regulating rod 20 is arranged in the regulating mounting hole 1011, the flow regulating rod 20 is provided with a gas regulating port 201, and the gas regulating port 201 is used for being matched with the inner wall of the regulating mounting hole 1011 to regulate the output gas flow of the gas outlet. The gas flow area between the gas quantity adjusting port 201 on the flow adjusting rod 20 and the gas outlet channel 105 is adjusted to be small, namely, the gas outlet hole is adjusted to be small by rotating the button, and the gas quantity is adjusted to be small before gas outlet, so that the gas quantity adjusting output of the gas outlet 104 is realized, a driving gas source is provided for the small-capacity actuator, and the stable work of the small-capacity actuator is ensured.
Referring to fig. 1 and 3, the flow control device further includes: a hold-down screw 50; a hold-down screw 50 hole 1012 is provided at one side of the flow rate adjustment mounting hole 1011, and the hold-down screw 50 is provided in the hold-down screw 50 hole 1012 to hold down and fix the flow rate adjustment lever 20 in the vertical direction. As shown in fig. 1 and 3, the compression screw 50 is disposed in parallel with the flow rate adjustment lever 20. And the screw head of the pressing screw 50 is located at a position above the flow rate adjusting rod 20, so that when the flow rate adjusting rod 20 passes through the adjusted proper output air flow rate, the pressing screw 50 can be used for pressing and fixing the flow rate adjusting rod 20. So as to prevent the flow adjustment rod 20 from rotating, thereby changing the gas flow area between the gas quantity adjustment opening 201 on the flow adjustment rod 20 and the gas outlet channel 105, and further changing the flow rate of the output gas of the gas outlet 104.
Referring to fig. 1 and 3, the flow control device further includes: upper and lower set screws 60; the positioner body 10 further has a fixing screw hole 1013 on one side thereof, the fixing screw hole 1013 communicates with the adjustment mounting hole 1011, and the upper and lower fixing screws 60 are disposed in the fixing screw hole 1013 to press and fix the flow rate adjustment lever 20 in the horizontal direction. As shown in fig. 1 and 3, the upper and lower fixing screws 60 are vertically disposed with respect to the flow rate adjustment lever 20. And the screw head of the pressing screw 50 is located at the middle position of the flow rate adjusting rod 20, when the flow rate adjusting rod 20 passes through the adjusted proper output air flow rate, the flow rate adjusting rod 20 can be pressed and fixed by the upper and lower fixing screws 60. So as to prevent the flow adjustment rod 20 from moving in the vertical direction, and thus prevent the flow adjustment rod 20 from moving up and down when the flow adjustment rod 20 adjusts the flow rate, which results in the output of the bottom of the gas flow adjustment rod 20, and change the areas of the gas flow adjustment port 201 on the flow adjustment rod 20 and the up-and-down position of the gas outlet channel 105, which results in the failure of normal flow adjustment. The vertical movement of the flow adjusting rod 20 during adjustment can be avoided by the upper and lower fixing screws 60, so that the flow can be accurately adjusted by the flow adjusting rod 20 during adjustment.
Referring to fig. 1 and 3, the flow rate adjusting rod 20 is further provided with an annular fixing groove 203, and one end of the upper and lower fixing screws 60 is disposed in the annular fixing groove 203 to press and fix the flow rate adjusting rod 20 in the horizontal direction. As shown in fig. 3, an annular fixing groove 203 is formed at a contact portion between the flow rate adjusting rod 20 and the upper and lower fixing screws 60, and the flow rate adjusting rod 20 can be pressed and fixed in a horizontal direction by the clamping and fixing of the annular fixing groove 203 and the upper and lower fixing screws 60. Further preventing the flow rate adjustment lever 20 from moving up and down.
Referring to fig. 1 and 3, the flow control device further includes: a seal ring 30; the flow rate adjusting rod is further provided with an annular sealing groove 202, and the sealing ring 30 is arranged in the annular sealing groove 202 to seal a gap between the flow rate adjusting rod 20 and the adjusting installation hole 1011. As shown in fig. 3, the flow rate adjusting rod 20 is further provided with an annular sealing groove 202, and the sealing ring 30 is disposed in the annular sealing groove 202, so that the gap between the flow rate adjusting rod 20 and the adjusting installation hole 1011 can be sealed. The air leakage phenomenon is avoided.
Referring to fig. 1 and 3, the top end of the flow control device flow adjustment stem 20 is also provided with an adjustment control groove 204. As shown in fig. 1 and 3, an adjustment control recess 204 is provided at the top end of the flow adjustment lever 20 to facilitate the user to rotatably adjust the flow adjustment lever 20 by an adjustment tool.
Referring to fig. 1 and 3, the flow control device further includes a flow display device 40, and the flow display device 40 is disposed on the positioner body 10 and communicates with the air outlet 104. As shown in fig. 1 and 3, the flow display device 40 communicates with the air outlet 104 to check and display the air flow and the air pressure at the air outlet 104, so that the user can read the information of the air flow at the outlet, thereby assisting the user in adjusting the air flow at the air outlet 104.
Referring to fig. 1 and 4, the air flow detecting end 401 of the flow display device 40 is disposed between the air flow regulating port 201 and the air outlet 104. By arranging the airflow detecting end 401 of the flow display device 40 between the airflow adjusting opening 201 and the air outlet 104, the output air after being adjusted by the flow adjusting rod 20 can be used for detecting the flow and the air pressure, so that the detection is more accurate.
Referring to fig. 1 and 3, the flow control device further includes a flow control fitting 101, and an adjustment fitting hole 1011, a compression screw 50 hole 1012 and a fixing screw hole 1013 are provided on the positioner body 10 through the flow control fitting 101, respectively. As shown in fig. 1 and 3, the position above the air outlet 104 of the flow control fitting 101, the adjusting fitting hole 1011 and the hold-down screw 50 hole 1012 are respectively provided on the positioner body 10 through the flow control fitting 101 to facilitate adjustment of the air flow rate through the flow adjusting lever 20 and the hold-down screw 50 during use, and mounting and dismounting. The fixing screw hole 1013 is provided at a side end position of the flow control attachment fitting 101, and the fixing screw hole 1013 is conveniently punched by the flow control attachment fitting 101.
Referring to fig. 5, in another aspect, the present invention further provides a method for achieving stable operation of a valve positioner based on the flow control device, including the steps of:
s101, connecting an air outlet of the flow control device to air receiving equipment;
and S102, adjusting the air volume output from the air outlet of the flow control device to the air receiving equipment by rotating and adjusting the flow adjusting rod according to the working air volume of the air receiving equipment.
Specifically, the flow rate adjusting rod 20 is disposed on the air outlet channel 105 of the positioner body 10 through the adjusting mounting hole 1011, and the outer wall of the flow rate adjusting rod 20 is fitted with the inside of the adjusting mounting hole 1011 to prevent the gas from being discharged from the adjusting mounting hole 1011. In addition, since the flow regulating rod 20 is disposed on the gas outlet channel 105, the gas outlet channel 105 can be blocked, and the flow of the output gas from the gas outlet 104 can be regulated by regulating the gas flow area between the gas amount regulating port 201 on the flow regulating rod 20 and the gas outlet channel 105. The gas flow area between the gas quantity adjusting port 201 on the flow adjusting rod 20 and the gas outlet channel 105 is adjusted to be small, namely, the gas outlet hole is adjusted to be small by rotating the button, and the gas quantity is adjusted to be small before gas outlet, so that the gas quantity adjusting output of the gas outlet 104 is realized, a driving gas source is provided for the small-capacity actuator, and the stable work of the small-capacity actuator is ensured.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A flow control device, comprising:
the gas outlet device comprises a locator main body, wherein an adjusting and mounting hole is formed in the locator main body and is communicated with a gas outlet channel on the locator main body;
the electrical converter is arranged in the positioner main body, and an air source output by the electrical converter is output to the air receiving equipment through the air outlet channel;
the flow adjusting rod is arranged in the adjusting mounting hole, an air flow adjusting port is arranged on the flow adjusting rod, and the air flow adjusting port is used for being matched with the inner wall of the adjusting mounting hole to adjust the output air flow of the air outlet hole.
2. The flow control device of claim 1, further comprising:
a compression screw;
one side of flow control mounting hole is equipped with the housing screw hole, the housing screw sets up the housing screw hole, and will the flow control pole compresses tightly fixedly toward the vertical direction.
3. The flow control device of claim 1, further comprising:
an upper fixing screw and a lower fixing screw;
still be equipped with fixed screw hole on one side of locator main part, fixed screw hole with adjust the mounting hole intercommunication, the set screw sets up from top to bottom in the fixed screw hole, with will flow control pole compresses tightly fixedly toward the horizontal direction.
4. A flow control device according to claim 3, wherein the flow control rod is further provided with an annular fixing groove, and one end of the upper and lower fixing screws is disposed in the annular fixing groove to press and fix the flow control rod in a horizontal direction.
5. The flow control device of claim 1, further comprising:
a seal ring;
the flow adjusting device is characterized in that an annular sealing groove is further formed in the flow adjusting device, and the sealing ring is arranged in the annular sealing groove to seal a gap between the flow adjusting rod and the adjusting mounting hole.
6. The flow control device as claimed in claim 1, wherein the top end of the flow regulating rod is further provided with a regulating control groove.
7. A flow control device according to claims 1 to 6 further including a flow display device provided on the positioner body and communicating with the air outlet.
8. A flow control device according to claim 7, wherein the gas flow detecting end of the flow display device is disposed between the gas flow regulating port and the gas outlet port.
9. The flow control device of claim 4, further comprising a flow control installation joint through which the adjustment installation hole, the compression screw hole, and the fixing screw hole are respectively provided on the positioner body.
10. A method for achieving stable operation of a valve positioner based on the flow control device of any one of claims 1 to 9, comprising the steps of:
connecting the air outlet of the flow control device to an air receiving device;
and adjusting the air volume output from the air outlet of the flow control device to the air receiving equipment by rotating and adjusting the flow adjusting rod according to the working air volume of the air receiving equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910950814.4A CN110594473A (en) | 2019-10-08 | 2019-10-08 | Flow control device and method for realizing stable operation of valve positioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910950814.4A CN110594473A (en) | 2019-10-08 | 2019-10-08 | Flow control device and method for realizing stable operation of valve positioner |
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|---|---|
| CN110594473A true CN110594473A (en) | 2019-12-20 |
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|---|---|---|---|
| CN201910950814.4A Pending CN110594473A (en) | 2019-10-08 | 2019-10-08 | Flow control device and method for realizing stable operation of valve positioner |
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| CN105386894A (en) * | 2015-12-10 | 2016-03-09 | 西安航天动力研究所 | High-pressure large-transformation-ratio flow regulating valve |
| CN206592612U (en) * | 2017-02-24 | 2017-10-27 | 浙江三国精密机电有限公司 | A kind of driven airflow control valve |
| CN208503536U (en) * | 2018-07-02 | 2019-02-15 | 河南新瑞泰环保科技有限公司 | A kind of micro flow regulating valve |
| CN108612898A (en) * | 2018-07-13 | 2018-10-02 | 深圳市摩控自动化设备有限公司 | Electropneumatic valve positioner gas circuit conversion equipment and electropneumatic valve positioner |
| CN109707866A (en) * | 2019-01-25 | 2019-05-03 | 浙江科博电器有限公司 | A kind of flow control valve |
| CN110030393A (en) * | 2019-05-15 | 2019-07-19 | 深圳市奥博特科技有限公司 | A kind of flow control valve |
| CN211117872U (en) * | 2019-10-08 | 2020-07-28 | 深圳市摩控自动化设备有限公司 | Flow control device of positioner |
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