CN214621326U - Meter-valve integrated flow monitoring device - Google Patents
Meter-valve integrated flow monitoring device Download PDFInfo
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- CN214621326U CN214621326U CN202121130975.8U CN202121130975U CN214621326U CN 214621326 U CN214621326 U CN 214621326U CN 202121130975 U CN202121130975 U CN 202121130975U CN 214621326 U CN214621326 U CN 214621326U
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- 238000012806 monitoring device Methods 0.000 title claims abstract description 26
- 238000001514 detection method Methods 0.000 claims abstract description 55
- 230000007246 mechanism Effects 0.000 claims abstract description 29
- 238000007689 inspection Methods 0.000 claims 2
- 230000004044 response Effects 0.000 abstract description 5
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 6
- 238000009434 installation Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
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Abstract
The utility model relates to a flow monitoring technical field especially relates to a table valve integral type flow monitoring device, include: the device comprises a shell, a flow detection mechanism, a pilot valve, a main valve and a controller, wherein an air inlet channel and an inner cavity are arranged in the shell, an outlet of the air inlet channel is communicated with the inner cavity, the flow detection mechanism is arranged in the inner cavity, an inlet of the flow detection mechanism is communicated with the inner cavity, an outlet of the flow detection mechanism is communicated with an inlet of the main valve, the main valve is arranged on a base of the shell, and the pilot valve is arranged on the main valve; the controller is electrically connected with the flow detection mechanism and the pilot valve, and the controller controls the opening degree of the main valve through the pilot valve. The gas flow value in the device is monitored in real time through an ultrasonic sensor, and the accurate control of the gas flow output by a main valve is realized through a PID control algorithm; the valve and meter integrated type solves the problems of long middle feedback time and slow response time.
Description
Technical Field
The utility model relates to a flow monitoring technical field especially relates to a table valve integral type flow monitoring device.
Background
The ultrasonic flow meter is an instrument for measuring the liquid flow in a circular tube by using a speed difference method as a principle, a meter-valve integrated flow monitoring device and a control valve in the prior art are independently operated, the control valve is required to be manually adjusted according to the data of a flow meter, but the data generated in the flow meter has a certain time difference with the adjustment of the control valve, the adjustment is very inaccurate, the control valve is required to be adjusted for many times to reach the required flow, and the instrument is very troublesome.
The prior patent CN202020139536 mentions a meter-valve integrated flow monitoring device, which is matched with an ultrasonic sensor through a ball valve, but the main purpose of the device is to solve the problem of signal attenuation, lack of a control unit, unable to control the flow,
patent 201010266959.1 proposes a pilot flow closed-loop controlled proportional flow valve used hydraulically, but the efficiency and accuracy of the detection is poor.
In the prior art, a valve is combined with a flowmeter, a general valve and the flowmeter are separately arranged, the middle feedback time is long, the existing valve is mainly provided with an electromagnetic valve, the response time is slow, and meanwhile, the separate design occupies a large space and is complex to install; in addition, the valve and the flowmeter are separately arranged, the occupied space is large, the pipeline at the interval between the valve and the flowmeter cannot control the pressure, the integral accuracy is poor, and the air pressure fluctuation is large.
SUMMERY OF THE UTILITY MODEL
The problems existing in the prior art are solved: the utility model provides a meter valve integrated flow monitoring device, which realizes the accurate control of the output gas flow of a main valve through the gas flow value in an ultrasonic sensor real-time monitoring device and a PID control algorithm; the valve and the meter are integrally arranged, so that the intermediate feedback time of the valve and the meter is short, the response time is short, the occupied space is small, and the installation is simple.
The utility model provides a technical scheme that its technical problem adopted is:
a meter-valve integrated flow monitoring device comprising: the shell is provided with an inner cavity, the inner cavity is communicated with the outer side of the shell through an air inlet channel, the flow detection mechanism is arranged in the inner cavity, an inlet of the flow detection mechanism is communicated with the inner cavity, an outlet of the flow detection mechanism is communicated with an inlet of a main valve, the main valve is arranged on the shell, and the pilot valve is arranged on the main valve;
the controller is electrically connected with the flow detection mechanism and the pilot valve, and the controller controls the opening degree of the main valve by driving the pilot valve.
Further, the shell is provided with a base, and the main valve is arranged on the base.
Furthermore, the air inlet channel, the inner cavity and the flow detection mechanism are arranged to be a labyrinth type channel, so that air flow smoothly passes through the flow detection mechanism, the detection precision is improved, the air inlet channel comprises a first channel, a second channel and a third channel which are sequentially communicated, the first channel is communicated with the outer side of the shell, and the third channel is communicated with the inner cavity.
Further, the second channel is perpendicular to the first channel and the third channel.
Further, the outlet of the third channel faces opposite to the inlet of the flow detection mechanism.
Furthermore, a horn-shaped opening is arranged at the inlet of the detection channel.
Furthermore, the flow detection mechanism further comprises a detection channel and two ultrasonic sensors arranged on the detection channel, the inlet of the detection channel is communicated with the inner cavity, the outlet of the detection channel is communicated with the inlet of the main valve, and the two ultrasonic sensors are fixed on the detection channel.
Furthermore, two ultrasonic sensor symmetry sets up on the measuring channel and the axis that detects the axis and measuring channel is 45 contained angles.
Furthermore, two clapboards are arranged in the detection channel to divide the detection channel into 3 areas, so that the disorder of air flow is prevented.
A control method of a meter-valve integrated flow monitoring device comprises the following steps:
s1: presetting a gas flow value required to be output by a main valve in a controller;
s2: the ultrasonic sensor monitors the gas flow in the detection channel in real time and feeds the gas flow back to the controller;
s3: judging whether the feedback gas flow value of the ultrasonic sensor is equal to the preset gas flow value required to be output by the main valve of S1;
if not, calculating a flow difference value between the feedback gas flow value and the preset output gas flow value, converting the flow difference value into a voltage signal value by the controller, feeding the voltage signal value back to the pilot valve 3, controlling a piezoelectric plate in the pilot valve 3 to open and close, thereby controlling the output flow of the main valve 4, and then returning to the step S2;
if yes, no voltage adjustment is needed to the pilot valve.
Further, the controller converts the flow difference value into a voltage signal value by adopting a PID control algorithm with the formula of
Wherein, Kp proportionality coefficient, TtAn integral time constant, a TD differential time constant, Y (t) output control voltage signals, and e (t) is a flow value deviation value.
The utility model has the advantages that:
1. the controller outputs a control voltage signal through PID control according to the deviation value of the gas flow monitored by the ultrasonic sensor and the preset gas flow, so that the pilot valve air flow can be controlled to drive the valve core of the main valve to lift, the gap between the valve core and the sealing piece can be changed when the valve core lifts, the real-time accurate control of the flow is realized, and the flow of the output air flow is guaranteed to maintain a fixed value.
2. The valve is directly arranged at the outlet of the flowmeter, the flow feedback distance is short, the control response time is short, the adjustment is fast, and the precision is high.
3. The meter valve is integrally designed, so that the occupied space is small, and the installation is convenient.
Drawings
FIG. 1 is a top view of the meter-valve integrated flow monitoring device of the present invention;
FIG. 2 is a front view of the meter-valve integrated flow monitoring device of the present invention;
FIG. 3 is a schematic sectional view taken along line A-A in FIG. 1;
FIG. 4 is a schematic sectional view taken along line B-B in FIG. 1;
FIG. 5 is a cross-sectional view of the main valve in the closed position of the present invention;
FIG. 6 is a cross-sectional view of the main valve in the open position of the present invention;
FIG. 7 is a flow chart of a control method of the meter-valve integrated flow monitoring device of the present invention;
in the figure, 1, a housing, 2, a flow rate detection mechanism, 3, a pilot valve, 4, a main valve, 11, an intake passage, 12, an inner chamber, 21, a detection passage, 22, an ultrasonic sensor, 111, and a first passage. 112. Second channel, 113, third channel, 411, seal, 412, spool, 413, stabilizer.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
As fig. 1, 2, 3 do the utility model discloses a table valve integral type flow monitoring device, include: the valve comprises a shell 1, a flow detection mechanism 2, a pilot valve 3 and a main valve 4, wherein an air inlet channel 11 and an inner cavity 12 are arranged in the shell 1, the air inlet channel 11 is communicated with the inner cavity 12, the flow detection mechanism 2 is arranged in the inner cavity 12, an inlet of the flow detection mechanism 2 is communicated with the inner cavity 12, an outlet of the flow detection mechanism 2 is communicated with an inlet of the main valve 4, the main valve 4 is arranged on a base of the shell 1, and the pilot valve 3 is arranged on the main valve 4.
The controller is electrically connected to the flow detection mechanism 2 and the pilot valve 3, and the controller controls the opening degree of the main valve 4 through the pilot valve 3, as shown in fig. 5 and 6, the main valve 4 is controlled by the pilot valve 3 in a closed state and an open state, respectively.
As shown in fig. 2, the utility model discloses a control method of meter valve integral type flow monitoring device, including following step:
s1: the gas flow value required to be output by the main valve 4 is preset in the controller;
s2: the ultrasonic sensor monitors the gas flow in the detection channel in real time and feeds the gas flow back to the controller;
s3: judging whether the feedback gas flow value of the ultrasonic sensor 22 is equal to the preset gas flow value required to be output by the main valve 4 of S1;
if not, the controller converts the flow difference value into a voltage signal value and feeds the voltage signal value back to the pilot valve 3, controls the piezoelectric plate in the pilot valve 3 to open and close, thereby controlling the output flow of the main valve 4, and then returns to the step S2;
if so, no voltage adjustment is required to the pilot valve 3.
The working principle is as follows: the meter-valve integrated flow monitoring device is connected with a pipeline to be monitored, gas to be monitored enters the meter-valve integrated flow monitoring device through an inlet of the air inlet channel 11, the gas enters the inner cavity 12 through the first channel 111, the second channel 112 and the third channel 113 of the air inlet channel 11 respectively, the inner cavity 12 is provided with an air channel, and the first channel 111, the second channel 112 and the third channel 113 of the air inlet channel 11 are connected in sequence to form a labyrinth-shaped channel, so that the gas cannot directly flow into the flow detection mechanism 2 after entering, the air flow fluctuation is small, and the detection accuracy of the ultrasonic sensor 22 is high; the detection channel 211 is provided with a baffle plate for dividing the gas flow into three areas to prevent the gas flow from being disordered, and the gas reaches the inlet of the main valve 4 and reaches the output end through the internal channel of the main valve 4.
Assuming that the output flow a of the main valve 4 is preset in the controller of the flow monitoring device, when the main valve 4 is in a closed state, the ultrasonic sensor 22 detects that the inlet flow of the main valve 4 is zero, the ultrasonic sensor 22 feeds back an actually monitored flow value to the controller, the controller calculates a deviation value of the actually measured flow value and the preset flow, and calculates a control voltage value through a PID control algorithm according to the flow deviation value, the controller feeds back a control voltage signal to the pilot valve 3, the gas output by the pilot valve 3 cooperates with a spring at the lower part of the spool of the main valve 4 to realize the lifting of the spool of the main valve 4, and the lifting of the spool changes the distance between the spool and the inner side step of the main valve, i.e. changes the size of the gas flow channel, thereby changing the output gas flow; the ultrasonic sensor 22 detects the change of the inlet flow of the main valve 4, and the controller continuously and circularly judges whether the inlet flow of the main valve 4 acquired by the ultrasonic sensor 22 is the same as the preset flow or not until the inlet flow of the main valve 4 acquired by the ultrasonic sensor 22 is equal to the preset flow, the flow deviation value is zero, and the control voltage value of the pilot valve 3 is not adjusted.
The utility model has the advantages that: the controller outputs a control voltage signal through PID control according to the deviation value of the gas flow monitored by the ultrasonic sensor and the preset gas flow, so that the pilot valve air flow can be controlled to drive the valve core of the main valve to lift, the gap between the valve core and the sealing piece can be changed when the valve core lifts, the real-time accurate control of the flow is realized, and the flow of the output air flow is guaranteed to maintain a fixed value. The valve is directly arranged at the outlet of the flowmeter, the flow feedback distance is short, and the control response time is short. The outlet of the air inlet channel, the inner cavity and the flow detection mechanism are arranged to be a labyrinth type flow channel, so that the air flow smoothly passes through the flow detection mechanism, and the detection precision is improved. In the prior art, a flow meter and a control valve are commonly connected in series on a pipeline to realize the control of the pipeline flow, but the structure has a section of interval pipeline between the flow meter and the control valve, so the initial debugging time and the intermediate process debugging time are both longer, and the utility model discloses because the flow detection mechanism is directly connected with the control valve part, the initial debugging of the device only needs 3 seconds to reach the set value, and the intermediate process can reach 1-2 seconds during control; and the existing separated arrangement occupies large space on one hand, and the interval pipeline between the valve and the flowmeter cannot control the flow, so that the overall accuracy is poor and the flow fluctuation is large.
In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (8)
1. A meter-valve integrated flow monitoring device, comprising: the flow detection device comprises a shell (1), a flow detection mechanism (2), a pilot valve (3), a main valve (4) and a controller, wherein the shell (1) is provided with an inner cavity (12), the inner cavity (12) is communicated with the outer side of the shell (1) through an air inlet channel (11), the flow detection mechanism (2) is arranged in the inner cavity (12), an inlet of the flow detection mechanism (2) is communicated with the inner cavity (12), an outlet of the flow detection mechanism (2) is communicated with an inlet of the main valve (4), the main valve (4) is arranged on the shell (1), and the pilot valve (3) is arranged on the main valve (4);
the controller is electrically connected with the flow detection mechanism (2) and the pilot valve (3), and the controller controls the opening degree of the main valve (4) by driving the pilot valve (3).
2. The meter-valve integrated flow monitoring device according to claim 1, characterized in that: the shell (1) is provided with a base, and the main valve (4) is arranged on the base.
3. The meter-valve integrated flow monitoring device according to claim 1, characterized in that: the air inlet channel (11) comprises a first channel (111), a second channel (112) and a third channel (113) which are sequentially communicated, the first channel (111) is communicated with the outer side of the shell (1), and the third channel (113) is communicated with the inner cavity (12).
4. A meter-valve integrated flow monitoring device according to claim 3, characterized in that: the second channel (112) is perpendicular to the first channel (111) and the third channel (113).
5. The meter-valve integrated flow monitoring device according to claim 1, characterized in that: the flow detection mechanism (2) comprises a detection channel (21) and two ultrasonic sensors (22) arranged on the detection channel (21), the inlet of the detection channel (21) is communicated with the inner cavity (12), the outlet of the detection channel (21) is communicated with the inlet of the main valve (4), and the two ultrasonic sensors (22) are fixed on the detection channel (21).
6. The meter-valve integrated flow monitoring device according to claim 5, characterized in that: and a horn-shaped opening is formed at the inlet of the detection channel (21).
7. The meter-valve integrated flow monitoring device according to claim 5, characterized in that: two ultrasonic sensor (22) symmetry sets up on inspection channel (21) and detection axis with the axis of inspection channel (21) is 45 contained angles.
8. The meter-valve integrated flow monitoring device according to claim 7, characterized in that: two clapboards are arranged in the detection channel (21) to divide the detection channel (21) into three areas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202121130975.8U CN214621326U (en) | 2021-05-25 | 2021-05-25 | Meter-valve integrated flow monitoring device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121130975.8U CN214621326U (en) | 2021-05-25 | 2021-05-25 | Meter-valve integrated flow monitoring device |
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| CN214621326U true CN214621326U (en) | 2021-11-05 |
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| CN202121130975.8U Active CN214621326U (en) | 2021-05-25 | 2021-05-25 | Meter-valve integrated flow monitoring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113514116A (en) * | 2021-05-25 | 2021-10-19 | 常州高凯电子有限公司 | A meter-valve integrated flow monitoring device and control method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113514116A (en) * | 2021-05-25 | 2021-10-19 | 常州高凯电子有限公司 | A meter-valve integrated flow monitoring device and control method |
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