CN210317637U - High-precision flow control system - Google Patents
High-precision flow control system Download PDFInfo
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- CN210317637U CN210317637U CN201921440419.3U CN201921440419U CN210317637U CN 210317637 U CN210317637 U CN 210317637U CN 201921440419 U CN201921440419 U CN 201921440419U CN 210317637 U CN210317637 U CN 210317637U
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- plunger
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Abstract
The utility model relates to the technical field of fluid control system, in particular to a high-precision flow control system, which comprises a nano-liter constant delivery pump, a pressure vessel filled with fluid raw materials, and a controller, wherein the nano-liter constant delivery pump comprises a base body, a cylinder body, a plunger rod, a plunger, a driving device, a feeding pipe and a discharging pipe, the plunger is fixed on the plunger rod, the front end of the cylinder body is provided with a front feeding port and a front discharging port, the rear end of the cylinder body is provided with a rear feeding port and a rear discharging port, the front feeding port is provided with a front feeding switch valve, the front discharging port is provided with a front discharging switch valve, the rear discharging port is provided with a rear feeding switch valve, the rear discharging port is provided with a rear discharging switch valve, the outlet of the feeding pipe is respectively communicated with the front feeding switch valve and the rear feeding switch valve, the inlet of the discharging, the flow and the output quantity of the fluid can be controlled with high precision, and the nano-liter quantitative pump can be cleaned quickly.
Description
The technical field is as follows:
the utility model relates to a fluid control system technical field especially relates to high accuracy flow control system.
Background art:
at present, gear pumps, vane pumps or plunger pumps are mainly used as power devices for liquid delivery. In the paint spraying and glue spraying industries, the paint and the glue have the characteristics of high viscosity and sensitivity to shearing force, and the precise control is difficult to realize during small-flow conveying. When the existing gear pump and vane pump products are used for conveying paint or glue, the small flow accurate control cannot be realized under the influence of high viscosity of the paint or glue, the precision is low, the mechanical sealing structure limits the products, and the products are not suitable for high-pressure working conditions; the gear pump is sealed by meshing of gears and conveys flow, has large shearing force to fluid, and is not suitable for fluids sensitive to the shearing force, such as paint, glue and the like. Some existing flow control systems use a plunger pump as a metering pump, the plunger pump is of a unidirectional extrusion structure, fluid is firstly sucked into a cylinder body to be stored during working, then the fluid in the cylinder body is pushed out, and therefore repeated operation is needed, fluid sucking time needs to be waited for, the function of intermittently conveying the fluid can be achieved, and the flow control system is only suitable for intermittent control and is not suitable for continuous control.
The utility model has the following contents:
the utility model aims at providing a can high accuracy control liquid output flow, can be in succession the high accuracy flow control system of ration output liquid to the not enough of prior art existence.
In order to realize the purpose, the utility model discloses a technical scheme is:
the high-precision flow control system comprises a nano-liter constant delivery pump, a pressure container filled with fluid raw materials and a controller, wherein the nano-liter constant delivery pump comprises a base body, a cylinder body arranged on the base body along the front-back direction, a plunger rod arranged in the cylinder body along the front-back direction in a sliding manner, a plunger in sliding fit with an inner cavity of the cylinder body, a driving device for driving the plunger rod to reciprocate linearly along the front-back direction, a feeding pipe and a discharging pipe, the plunger is fixed on the plunger rod, the front end of the cylinder body is provided with a front feeding port and a front discharging port, the rear end of the cylinder body is provided with a rear feeding port and a rear discharging port, the front feeding port is provided with a front discharging switch valve, the front discharging port is provided with a front discharging switch valve, the rear feeding port is provided with a rear feeding switch valve, the outlet of the feeding pipe is respectively communicated with, The rear discharge switch valve is communicated, the inlet of the feeding pipe is communicated with the bottom of the pressure container through a pipeline, and the driving device is electrically connected with the output end of the controller; the controller controls the driving device to drive the plunger rod and the plunger to do reciprocating linear motion along the front-back direction, when the plunger moves forwards, the front feeding switch valve and the rear discharging switch valve are closed, and the rear feeding switch valve and the front discharging switch valve are opened; when the plunger moves backwards, the front feeding switch valve and the rear discharging switch valve are opened, and the rear feeding switch valve and the front discharging switch valve are closed.
The driving device comprises a linear motor arranged on the seat body along the front-back direction, an output shaft of the linear motor is connected with the plunger rod, and the linear motor is electrically connected with the controller.
The linear motor is a linear servo motor or a linear stepping motor.
The driving device also comprises a sliding seat and a sliding guide rail arranged on the seat body along the front-back direction, an output shaft of the linear motor is connected with the plunger rod through the sliding seat, and the sliding seat is connected on the sliding guide rail in a sliding manner.
The linear motor is connected with an absolute value encoder used for detecting a rotor position signal of the linear motor, and the absolute value encoder is electrically connected with the input end of the controller.
And a pressure control valve is arranged on the pressure container, and the controller is electrically connected with the pressure control valve.
The front feeding switch valve, the rear feeding switch valve, the front discharging switch valve and the rear discharging switch valve are all pneumatic control valves.
The base body is provided with 2 reversing electromagnetic valves, the 2 reversing electromagnetic valves are respectively electrically connected with the output end of the controller, the gas signal control ports of the front feeding switch valve and the rear discharging switch valve are communicated with one reversing electromagnetic valve through pipelines, and the gas signal control ports of the rear feeding switch valve and the front discharging switch valve are communicated with the other reversing electromagnetic valve through pipelines.
The utility model has the advantages that: the utility model discloses a high accuracy flow control system includes nanoliter constant delivery pump, the pressure vessel who is equipped with fluid material, a controller, nanoliter constant delivery pump is including the pedestal, the cylinder body, the plunger pole, the plunger, drive arrangement, the inlet pipe, the discharging pipe, the plunger is fixed on the plunger pole, the front end of cylinder body has seted up the preceding feed inlet, preceding discharge gate, the rear end of cylinder body has seted up back feed inlet, the back discharge gate, the preceding feed inlet is equipped with the material inlet switch valve, the preceding discharge gate is equipped with the material outlet switch valve, the back feed inlet is equipped with the material inlet switch valve, the back discharge gate is equipped with the material outlet switch valve, the export of inlet pipe respectively with the material inlet switch valve, the material inlet switch valve communicates before, the material outlet switch valve after, the entry of discharging pipe respectively with preceding material outlet switch valve, the material outlet switch valve communicates after, drive arrangement plunger pole and plunger are along the reciprocal linear, the rear feeding switch valve and the front discharging switch valve are opened, the fluid raw material in the front cavity of the cylinder body is pushed out from the front discharging port to the discharging pipe to be conveyed out under the pushing of the plunger, and meanwhile, the rear cavity of the cylinder body generates suction to suck the fluid raw material into the rear cavity of the cylinder body from the feeding pipe and the rear discharging port in sequence; when the plunger rearward movement, preceding material inlet switch valve and back ejection of compact ooff valve are opened, and back material inlet switch valve and preceding ejection of compact ooff valve are closed, and the fluid raw materials in the cavity behind the cylinder body is released the discharging pipe by the back discharge gate under the promotion of plunger and is carried away, and the cavity produces suction before the cylinder body simultaneously with the fluid raw materials by the inlet pipe in proper order before the material inlet inhales the cavity before the cylinder body, so circulate, compare in traditional plunger pump, the utility model discloses a high accuracy flow control system has following advantage:
1. the driving device can output fluid raw materials in the forward movement process and the reverse movement process, and can realize continuous output of fluid;
2. the fluid raw material is pushed to move by the linear motion of the plunger, so that no shearing force action exists on the fluid, and the fluid can be used for conveying the water-based paint and the glue sensitive to the shearing force;
3. the flow and output quantity of the fluid can be controlled at high precision by controlling the moving speed and distance of the plunger, the liquid can be continuously and quantitatively output, nano-grade fluid control can be realized, and intermittent quantitative extrusion, continuous constant flow control and the like can be realized;
4. the cylinder body has self-suction capacity, a fluid inlet does not need to be additionally provided with a power device, the structure is simple, and the control is more convenient;
5. the front feeding switch valve, the rear feeding switch valve, the front discharging switch valve and the rear discharging switch valve are all active control valves, can be respectively and independently controlled to be opened and closed and can be completely opened, after all the switch valves are opened, water or cleaning solution can rapidly flow through the feeding pipe, the front and rear chambers of the cylinder body, all the switch valves and the discharging pipe when being introduced, and a high-precision flow control system can be rapidly cleaned;
6. the driving device comprises a linear motor arranged on the seat body along the front-back direction, an output shaft of the linear motor is connected with the plunger rod, the moving speed of the plunger is in direct proportion to the rotating speed of the linear motor, and the moving speed of the plunger can be accurately controlled by controlling the rotating speed of the linear motor, so that the flow of the output liquid can be controlled at high precision, and the flow measurement is accurate.
Description of the drawings:
fig. 1 is a schematic structural diagram of a flow control system of the present invention;
FIG. 2 is a schematic structural view of a nano-liter constant displacement pump of the present invention;
FIG. 3 is a schematic structural view of the cylinder body of the nano-liter quantitative pump of the present invention;
FIG. 4 is a schematic structural view of the nano-liter constant displacement pump during the forward movement of the plunger;
FIG. 5 is a schematic structural view of the nano-liter constant delivery pump plunger in the backward movement process;
FIG. 6 is a schematic structural view of the nano-liter constant delivery pump in the cleaning process;
fig. 7 is a control schematic diagram of the flow control system of the present invention.
The specific implementation mode is as follows:
the following description of the present invention will be further described with reference to the accompanying drawings, as shown in fig. 1-7, the present invention provides a high precision flow control system, which comprises a nano-lift metering pump, a pressure vessel 8 containing fluid raw material, and a controller 9, wherein the nano-lift metering pump comprises a base 1, a cylinder body 2 arranged on the base 1 along the front-back direction, a plunger rod 3 arranged in the cylinder body 2 along the front-back direction in a sliding manner, a plunger 4 in sliding fit with an inner cavity of the cylinder body 2, a driving device 5 for driving the plunger rod 3 to reciprocate linearly along the front-back direction, a feeding pipe 6, a discharging pipe 7, the plunger 4 is fixed on the plunger rod 3, and the plunger 4 separates the inner cavity of the cylinder body 2 into a front. The front end of cylinder body 2 has been seted up and has been advanced material mouth 21, preceding discharge gate 22, preceding discharge gate 21 and preceding discharge gate 22 and preceding cavity intercommunication, the rear end of cylinder body 2 has been seted up and has been advanced material mouth 23, back discharge gate 24, back discharge gate 23 and back discharge gate 24 and back cavity intercommunication, preceding discharge gate 21 is equipped with material feed ooff valve 25, preceding discharge gate 22 is equipped with preceding ejection of compact ooff valve 26, back discharge gate 23 is equipped with back feeding ooff valve 27, back discharge gate 24 is equipped with back ejection of compact ooff valve 28, the export of inlet pipe 6 communicates with preceding material feed ooff valve 25, back feeding ooff valve 27 respectively, the entry of discharging pipe 7 communicates with preceding ejection of compact ooff valve 26, back ejection of compact ooff valve 28 respectively, the entry of inlet pipe 6 passes through the pipeline and communicates. The driving device 5 is electrically connected with the output end of the controller 9; . The nano-liter constant flow pump of the high-precision flow control system has the advantages of high reaction speed, short reversing time and extremely small pulsation, and can realize smooth and zero-pulsation constant flow control. The wide-range flow control can be realized by arranging the cylinder bodies 2 with different capacities, the self-packing sealing element and the plunger 4 made of corrosion-resistant materials, and high-viscosity and low-viscosity fluids can be applied to low-pressure and high-pressure working conditions.
The controller 9 controls the driving device 5 to drive the plunger rod 3 and the plunger 4 to do reciprocating linear motion along the front-back direction, when the plunger 4 moves forwards, the front feeding switch valve 25 and the rear discharging switch valve 28 are closed, the rear feeding switch valve 27 and the front discharging switch valve 26 are opened, the fluid raw material in the front cavity of the cylinder body 2 is pushed out to the discharging pipe 7 through the front discharging hole 22 under the pushing of the plunger 4 and is conveyed out, and meanwhile, the rear cavity of the cylinder body 2 generates suction force to suck the fluid raw material in the pressure container 8 into the rear cavity of the cylinder body 2 through the feeding pipe 6 and the rear discharging hole 23 in sequence; when the plunger 4 moves backwards, the front feeding switch valve 25 and the rear discharging switch valve 28 are opened, the rear feeding switch valve 27 and the front discharging switch valve 26 are closed, the fluid raw material in the rear cavity of the cylinder body 2 is pushed out to the discharging pipe 7 through the rear discharging port 24 under the pushing of the plunger 4 and is conveyed out, meanwhile, the front cavity of the cylinder body 2 generates suction force to suck the fluid raw material in the pressure container 8 into the front cavity of the cylinder body 2 through the feeding pipe 6 and the front discharging port 21 in sequence, and when one cavity of the cylinder body 2 discharges, the other cavity sucks the material at the same time, and the process is repeated.
The driving device 5 can output fluid raw materials in the forward movement process and the reverse movement process, and can realize continuous output and supply of fluid; the fluid raw material is pushed to move by the linear motion of the plunger 4, so that no shearing force action exists on the fluid, and the fluid raw material can be used for conveying the water-based paint and glue sensitive to the shearing force; the flow and output quantity of the fluid can be controlled at high precision by controlling the moving speed and distance of the plunger 4, the liquid can be continuously and quantitatively output, nano-grade fluid control can be realized, and intermittent quantitative extrusion, continuous constant flow control and the like can be realized; the cylinder body 2 has self-suction capacity, a fluid inlet does not need to be additionally provided with a power device, the structure is simple, and the control is more convenient; preceding feeding ooff valve 25, back feeding ooff valve 27, preceding ejection of compact ooff valve 26 and back ejection of compact ooff valve 28 all are active control valve, can open and close by independent control respectively, can all open, each ooff valve is whole to be opened the back, can flow through inlet pipe 6 fast when letting in water or cleaning solution, the front and back cavity of cylinder body 2, each ooff valve, discharging pipe 7 and wash away the fluid raw materials, can wash fast and receive liter measuring pump, and traditional plunger pump need repeat very many times suction, the action of extruding just can play abluent effect, the cleaning efficiency is low, and the fluid raw materials is remained very easily in the plunger pump inside, the cleaning performance is not good.
The driving device 5 comprises a linear motor 51 arranged on the base body 1 along the front-back direction, an output shaft of the linear motor 51 is connected with the plunger rod 3, the linear motor 51 is electrically connected with the controller 9, the moving speed of the plunger 4 is in direct proportion to the rotating speed of the linear motor 51, and the moving speed of the plunger 4 can be accurately controlled by controlling the rotating speed of the linear motor 51, so that the flow of the output liquid can be controlled at high precision, the flow measurement is accurate, and the micron-scale stroke control can be realized.
The driving device 5 further comprises a sliding seat 52 and a sliding guide rail 53 arranged on the seat body 1 along the front-back direction, the output shaft of the linear motor 51 is connected with the plunger rod 3 through the sliding seat 52, and the sliding seat 52 is connected on the sliding guide rail 53 in a sliding manner, so that the sliding seat 52 slides more stably. The linear motor 51 is a linear servo motor or a linear stepping motor.
The linear motor 51 is connected with an absolute value encoder 54 for detecting a rotor position signal of the linear motor 51, a rotating shaft of the linear motor 51 is connected with the absolute value encoder 54 in a driving manner, and the absolute value encoder 54 is electrically connected with an input end of the controller 9. The absolute value encoder 54 can detect the number of rotations of the linear motor 51 to obtain stroke position data of the output shaft of the linear motor 51, and stroke position data of the forward stroke limit position and stroke position data of the backward stroke limit position of the linear motor 51 are set in advance. The linear motor 51 is driven to rotate to drive the sliding seat 52, the plunger rod 3 and the plunger 4 to linearly move in the front-back direction, when the output shaft of the linear motor 51 is detected to move forwards to be in accordance with the set stroke position data, the linear motor 51 automatically rotates in the reverse direction to drive the sliding seat 52, the plunger rod 3 and the plunger 4 to linearly move backwards together, when the output shaft of the linear motor 51 is detected to move backwards to be in accordance with the set stroke position data, the linear motor 51 automatically rotates in the reverse direction to drive the sliding seat 52, the plunger rod 3 and the plunger 4 to linearly move forwards together, and the cycle is repeated, the linear motor 51 is controlled to continuously rotate forwards and reversely through the stroke position data to realize the reciprocating linear motion of the plunger 4, so that the control is simple and convenient, the reaction speed is high, the reversing time is short, the pulsation is extremely.
The front feeding switch valve 25, the rear feeding switch valve 27, the front discharging switch valve 26 and the rear discharging switch valve 28 are all pneumatic control valves, so that the reaction action speed is high, and the control is convenient. Be equipped with 2 switching-over solenoid valves 11 on the pedestal 1, 2 switching-over solenoid valves 11 are connected with the output electricity of controller 9 respectively, the gas signal control mouth of preceding material switch valve 25 and back ejection of compact ooff valve 28 all communicates through pipeline and one of them switching-over solenoid valve 11, back material switch valve 27, the gas signal control mouth of preceding ejection of compact ooff valve 26 all communicates through pipeline and another switching-over solenoid valve 11, for preceding material switch valve 25 through switching-over solenoid valve 11, back material switch valve 27, preceding ejection of compact ooff valve 26 and back ejection of compact ooff valve 28 provide the gas signal.
The absolute value encoder 54 detects the number of turns of the linear motor 51 in real time and feeds back the number to the controller 9, the controller 9 calculates real-time stroke position data of the output shaft of the linear motor 51, when the output shaft of the linear motor 51 moves axially to be in accordance with the set stroke position data, the controller 9 sends signals for executing opposite action states to the linear motor 51 and the 2 reversing electromagnetic valves 11 respectively, the linear motor 51 automatically rotates in reverse direction to drive the sliding seat 52, the plunger rod 3 and the plunger 4 to move in reverse direction together, meanwhile, the front feeding switch valve 25, the rear feeding switch valve 27, the front discharging switch valve 26 and the rear discharging switch valve 28 automatically switch in opposite states, the closing switch is opened, the opening switch is closed, the linear motor 51 is controlled by the stroke position data to continuously rotate in forward and reverse, and the switch valves are controlled to continuously switch working states, the reciprocating linear motion of the plunger 4 and the continuous output and supply of the liquid are realized, the control is simple and convenient, the reaction speed is high, the reversing time is short, the pulsation is extremely small, and the smooth and zero-pulsation constant flow control can be realized.
The utility model discloses a galvanometer detects linear electric motor 51's operating current, because linear electric motor 51's torsion is directly proportional with linear electric motor 51's operating current, pressure in the cylinder body 2 is directly proportional with linear electric motor 51's torsion, consequently, the operating current through detecting linear electric motor 51 just can obtain the pressure size in the cylinder body 2, automatic control linear electric motor 51 slows down or the standby when detecting the too big pressure in the cylinder body 2, automatic control linear electric motor 51 continues the operation when detecting the pressure in the cylinder body 2 is normal. When the outlet of the cylinder body 2 is closed or blocked, the motor can be decelerated or standby, and automatically continues to operate when the outlet is opened or dredged, so that the device is safe and reliable.
The pressure container 8 is provided with a pressure control valve 81, the pressure control valve 81 can be a pressure reducing valve, the controller 9 is electrically connected with the pressure control valve 81, the controller 9 can automatically adjust the pressure of the pressure container 8 through the pressure control valve 81 according to the working state of the nano-liter quantitative pump, so that the pressure in a system pipeline is controlled, the pressure container 8 can be ensured to stably and reliably supply fluid raw materials, and the stability of various parameters of the fluid is ensured. Because only keep under the condition of certain velocity of flow in the pipeline for fluids such as coating, glue, fluidic each item parameter just can remain stable, the utility model discloses according to hydrodynamics's principle, through the pressure in the control fluid system pipeline, guarantee the velocity of flow of fluid in the pipeline to guarantee the stability of fluid each item parameter.
As another embodiment of the utility model, the utility model discloses can also be through travel switch control linear electric motor 51 corotation, reversal, the position that lies in sliding seat 52 the place ahead and rear on pedestal 1 is equipped with travel switch respectively, and when sliding seat 52 removed the travel switch position, linear electric motor 51 automatic counter-rotation drove sliding seat 52, plunger rod 3 and plunger 4 counter-motion together, through travel switch control linear electric motor 51 continuous corotation, reversal, realizes plunger 4's reciprocal linear motion.
Of course, the above description is only the preferred embodiment of the present invention, so all the equivalent changes or modifications made by the structure, features and principles in accordance with the claims of the present invention are included in the claims of the present invention.
Claims (8)
1. High accuracy flow control system, its characterized in that: comprises a nano-liter constant delivery pump, a pressure container (8) filled with fluid raw materials and a controller (9), wherein the nano-liter constant delivery pump comprises a base body (1), a cylinder body (2) arranged on the base body (1) along the front-back direction, a plunger rod (3) arranged in the cylinder body (2) along the front-back direction in a sliding way, a plunger (4) in sliding fit with an inner cavity of the cylinder body (2), a driving device (5) for driving the plunger rod (3) to do reciprocating linear motion along the front-back direction, a feeding pipe (6) and a discharging pipe (7), the plunger (4) is fixed on the plunger rod (3), the front end of the cylinder body (2) is provided with a front feeding port (21) and a front discharging port (22), the rear end of the cylinder body (2) is provided with a rear feeding port (23) and a rear discharging port (24), the front feeding port (21) is provided, a rear feeding switch valve (27) is arranged at the rear feeding port (23), a rear discharging switch valve (28) is arranged at the rear discharging port (24), an outlet of the feeding pipe (6) is respectively communicated with the front feeding switch valve (25) and the rear feeding switch valve (27), an inlet of the discharging pipe (7) is respectively communicated with the front discharging switch valve (26) and the rear discharging switch valve (28), an inlet of the feeding pipe (6) is communicated with the bottom of the pressure container (8) through a pipeline, and the driving device (5) is electrically connected with an output end of the controller (9); the controller (9) controls the driving device (5) to drive the plunger rod (3) and the plunger (4) to do reciprocating linear motion along the front-back direction, when the plunger (4) moves forwards, the front feeding switch valve (25) and the rear discharging switch valve (28) are closed, and the rear feeding switch valve (27) and the front discharging switch valve (26) are opened; when the plunger (4) moves backwards, the front feeding switch valve (25) and the rear discharging switch valve (28) are opened, and the rear feeding switch valve (27) and the front discharging switch valve (26) are closed.
2. The high accuracy flow control system of claim 1, wherein: the driving device (5) comprises a linear motor (51) arranged on the base body (1) along the front-back direction, an output shaft of the linear motor (51) is connected with the plunger rod (3), and the linear motor (51) is electrically connected with the controller (9).
3. The high accuracy flow control system of claim 2, wherein: the linear motor (51) is a linear servo motor or a linear stepping motor.
4. The high accuracy flow control system of claim 2, wherein: the driving device (5) further comprises a sliding seat (52) and a sliding guide rail (53) which is arranged on the seat body (1) along the front-back direction, an output shaft of the linear motor (51) is connected with the plunger rod (3) through the sliding seat (52), and the sliding seat (52) is connected to the sliding guide rail (53) in a sliding mode.
5. The high accuracy flow control system of claim 4, wherein: the linear motor (51) is connected with an absolute value encoder (54) used for detecting a rotor position signal of the linear motor (51), and the absolute value encoder (54) is electrically connected with the input end of the controller (9).
6. The high accuracy flow control system of claim 1, wherein: and a pressure control valve (81) is arranged on the pressure container (8), and the controller (9) is electrically connected with the pressure control valve (81).
7. A high accuracy flow control system according to any of claims 1 to 6, characterized in that: the front feeding switch valve (25), the rear feeding switch valve (27), the front discharging switch valve (26) and the rear discharging switch valve (28) are all pneumatic control valves.
8. The high accuracy flow control system of claim 7, wherein: the base body (1) is provided with 2 reversing electromagnetic valves (11), the 2 reversing electromagnetic valves (11) are respectively electrically connected with the output end of the controller (9), the gas signal control ports of the front feeding switch valve (25) and the rear discharging switch valve (28) are communicated with one reversing electromagnetic valve (11) through pipelines, and the gas signal control ports of the rear feeding switch valve (27) and the front discharging switch valve (26) are communicated with the other reversing electromagnetic valve (11) through pipelines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921440419.3U CN210317637U (en) | 2019-09-02 | 2019-09-02 | High-precision flow control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921440419.3U CN210317637U (en) | 2019-09-02 | 2019-09-02 | High-precision flow control system |
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| Publication Number | Publication Date |
|---|---|
| CN210317637U true CN210317637U (en) | 2020-04-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921440419.3U Expired - Fee Related CN210317637U (en) | 2019-09-02 | 2019-09-02 | High-precision flow control system |
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| CN (1) | CN210317637U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110905754A (en) * | 2019-09-02 | 2020-03-24 | 苏州悦奇宁流体自动化科技有限公司 | High-precision flow control system |
-
2019
- 2019-09-02 CN CN201921440419.3U patent/CN210317637U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110905754A (en) * | 2019-09-02 | 2020-03-24 | 苏州悦奇宁流体自动化科技有限公司 | High-precision flow control system |
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Granted publication date: 20200414 Termination date: 20210902 |