CN104879340A - Alternating-current flow proportion regulation control device - Google Patents
Alternating-current flow proportion regulation control device Download PDFInfo
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- CN104879340A CN104879340A CN201510191708.4A CN201510191708A CN104879340A CN 104879340 A CN104879340 A CN 104879340A CN 201510191708 A CN201510191708 A CN 201510191708A CN 104879340 A CN104879340 A CN 104879340A
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- Prior art keywords
- lever
- slide block
- connecting rod
- support
- fixed
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/044—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by electrically-controlled means, e.g. solenoids, torque-motors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
- F16K31/046—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor with electric means, e.g. electric switches, to control the motor or to control a clutch between the valve and the motor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/50—Mechanical actuating means with screw-spindle or internally threaded actuating means
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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
- F16K31/44—Mechanical actuating means
- F16K31/52—Mechanical actuating means with crank, eccentric, or cam
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Transmission Devices (AREA)
Abstract
The invention provides an online alternating-current flow proportion regulation control device and belongs to the technical field of alternating-current hydraulics. The control device is characterized by comprising a crank, a slider, a connecting rod, a lever, a ball screw, a ball nut, a servo motor, a hydraulic cylinder and the like. The crank in a crank-connecting rod mechanism drives the slider to move through the connecting rod according to the sine rule, and sine rule change is transmitted to a piston of the hydraulic cylinder after being magnified/shrunk by certain times by a lever system composed of the lever, a lever bearing and the like. The piston enables the output end of the hydraulic cylinder to accurately output set alternating-current flow according to the sine rule change magnified/shrunk by certain times, so that real-time dynamic on-line accurate linear proportion regulation of the alternating-current flow is realized. The control device has the advantages that the device is smart in structure, reasonable in layout and high in measurement accuracy, the problem that the alternating-current flow cannot be regulated proportionally online with high precision by traditional crank length changing methods and the like is solved, and good promotional value is obtained.
Description
Technical field
The invention belongs to wave transmission hydraulics field, relate to AC hydraulic transmission and control, the control gear that especially a kind of online exchange flow proportional regulates.
Background technique
Wave transmission hydraulics transmits hydraulic energy by means of the change of periodic pressure and flow, usually in energy transmission loop, does not have net flow.Ac hydraulic system except there is level and smooth, reliable, the advantage such as power is large of general Hydraulic Power Transmission System, also have the advantage of its uniqueness as: ac hydraulic system can resist difference variation interior in a big way; Utilize isolator can isolate damaged loop, the occasion of intense radiation can also be applied to.Ac hydraulic system is compared with general hydraulic system, and the processing cost of ac hydraulic system is lower, adopts less component, does not usually adopt accurate servovalve, to hydraulic oil require low, contamination resistance is strong.Very important effect has been played in the equipment with to-and-fro motion and impact shock mechanism.The size according to the size of load and reciprocation amplitude adjustment communication flow is needed in practical application.But by the restriction of mechanical structure, the amplitude of online real time linear adjustment communication flow is very difficult.
At present, both at home and abroad also not for the flow proportional control set for adjusting that ac hydraulic system is special.Adopt the reciprocating impact vibratory equipment of AC hydraulic principle, communication flow is regulated and is usually realized by the change length of driving crank or the size of cam under off-line state.This adjustment has two shortcomings: 1. regulate and cannot carry out online, can operate when equipment is out of service; 2. the amplitude regulated is uncontrollable, belongs to coarse adjustment state, cannot accurate regulating and controlling.Therefore, owing to cannot on-line control communication flow and flow amplitude regulate uncontrollable, the mode of existing change crank length or cam dimension to realize the high-precision online proportion adjustment of communication flow.
Summary of the invention
The object of the invention is: a kind of Flow-rate adjustment control gear is provided, achieve real-time, dynamic, online, the linear scale fine adjustment of communication flow, solve the methods such as tradition change crank length and highi degree of accuracy cannot regulate the problem of communication flow online.
The technical solution used in the present invention is: the control gear that a kind of online exchange flow proportional regulates is made up of three cover subtense angles, is exchange driver sub-system, communication flow output subsystem, lever proportion adjustment subtense angle respectively.Exchange driver sub-system primarily of dunnage A1, motor support base 2, coupling A3, motor 4, slide block set 5, slide block does not draw in slide block set 5, and roll left dynamic bearing supporting base 13, crank 14, right roller bearings seat 15, composition such as connecting rod 16 grade.Communication flow output subsystem system primarily of dunnage B22, composition such as oil hydraulic cylinder 23 grade.Lever proportion adjustment subtense angle primarily of connecting rod A 6, pin A7, slide block A 17, lever 8, ball screw nut support 9, support collateral holder assembly 10, slide block C11, guide rail 12, lever support 18, pin C19, ball nut 20, ball screw 21, fixed side supporting assembly 27, coupling B28, actuating motor 29, actuating motor bearing 30, support baseboard 31, the compositions such as connecting rod B24, pin B25, slide block B 26.
Wherein, dunnage A1, dunnage B22 are fixed on wall, are respectively used to support exchange driver sub-system and communication flow output subsystem; Support baseboard 31 is fixed on ground, for support lever proportion adjustment subtense angle.Roll left dynamic bearing supporting base 13 and right roller bearings seat 15 is fixed on dunnage A1 for supporting crank 14, the motor 4 be fixed on motor support base 2 is connected with crank 14 by coupling A3, crank 14, connecting rod 16, be fixed on the slide block set 5 above dunnage A1 and slide block composition connecting rod, the circular movement band movable slider of crank 14 does sinusoidal regular movement in slide block set 5.Slide block in connecting rod A6 upper end and connecting rod is rigidly connected by screw thread, and lower end is connected with slide block A17 by pin A7, is moved up and down together with the slide block in connecting rod by connecting rod A6, is with movable slider A17 to move on lever 8.Lever 8 and lever support 18 are interference fit, and lever support 18 is connected with ball screw nut support 9 upper end by pin C19.The bottom of ball screw nut support 9 is fixed by screws in above the slide block C11 that can be free to slide on guide rail 12, and middle part is connected with ball nut 20 by screw.Support that collateral holder assembly 10 and fixed side supporting assembly 27 are fixed on above support baseboard 31, for supporting the ball screw 21 coordinated with ball nut 20.The actuating motor 29 being fixed on actuating motor bearing 30 drives ball screw 21 to rotate by coupling B28, and by ball screw nut support 9 driven rod bearing 18, lever 8 moves left and right, and realizes the adjustment of the work fulcrum of lever 8.Be elected to after reserving the work fulcrum of lever 8, slide block A17 moves on lever 8, drives lever 8 around work fulcrum simultaneously, drives the slide block B 26 of lever 8 the other end to move on lever 8.Connecting rod B24 one end is connected by pin B25 with slide block B 26, and the other end is rigidly connected with thread forms and oil hydraulic cylinder 23 input end.The motion of slide block B 26, drive moving up and down of connecting rod B24, the piston being fixed on oil hydraulic cylinder 23 on dunnage B22 is driven to do the sinusoidal regular movement of zoom in/out, by sinusoidal displacement in slide block set 5 of the slide block that exchanges in driver sub-system or velocity variations, after online scale amplifying/reduce, pass to the piston of oil hydraulic cylinder 23, the output terminal realizing oil hydraulic cylinder 23 accurately exports the communication flow of setting.
Effect of the present invention with benefit is: by exchanging driver sub-system, this device that communication flow output subsystem and lever proportion adjustment subtense angle three part form can change exchanging the sinusoidal displacement that in driver sub-system, connecting rod produces the change being changed into certain proportion sinusoidal displacement speed by lever proportion adjustment subtense angle proportion adjustment zoom in/out, thus makes oil hydraulic cylinder output terminal accurately produce the communication flow of setting.Driven any adjustment of balance pivot by ball screw motion by actuating motor, realize any multiple zoom in/out of lever system, be ensure that the stationarity of balance pivot adjustment process by slide block, guide rail mechanism simultaneously, stressed simultaneously on fulcrum is applied on guide rail, ensure the straightness accuracy of leading screw, improve the accuracy that fulcrum regulates.This apparatus structure is dexterous, rationally distributed, zoom in/out multiple is easy to adjust, has good promotional value.
Accompanying drawing explanation
Fig. 1 is a kind of plan view of AC hydraulic amplifying device general structure of variable amplification.
Fig. 2 is a kind of plan view of AC hydraulic amplifying device general structure of variable amplification.
Fig. 3 is a kind of left view of AC hydraulic amplifying device general structure of variable amplification.
Fig. 4 is a kind of normal axomometric drawing of AC hydraulic amplifying device general structure of variable amplification.
Fig. 5 is the structural representation of another angle.
In figure: 1 dunnage A; 2 motor support bases; 3 coupling A; 4 motors; 5 slide block sets;
6 connecting rod A; 7 pin A; 8 levers; 9 ball screw nut supports;
10 support collateral holder assembly; 11 slide block C; 12 guide rails; 13 roll left dynamic bearing supporting base;
14 cranks; 15 right roller bearings seats; 16 connecting rods; 17 slide block A; 18 lever supports
19 pin C; 20 ball nuts; 21 ball screws; 22 dunnage B; 23 oil hydraulic cylinders;
24 connecting rod B; 25 pin B; 26 slide block B; 27 fixed side supporting assemblies; 28 coupling B;
29 actuating motors; 30 actuating motor bearings; 31 support baseboards.
Embodiment
The specific embodiment of the present invention is described in detail below in conjunction with technological scheme and accompanying drawing.
Exchange dunnage A1, dunnage B22 in communication flow output subsystem in driver sub-system, be fixed on wall, for supporting respective subtense angle, support baseboard 31 in lever proportion adjustment subtense angle, is fixed on ground, for support lever proportion adjustment subtense angle.Exchange in driver sub-system, motor support base 2 is fixed on dunnage A1, motor 4 is connected with crank 14 by coupling A3, and crank 14, connecting rod 16, be fixed on slide block set 5 above dunnage A1, slide block do not draw composition connecting rod inside slide block set 5, the circular movement band movable slider of crank 14 changes sinusoidally in slide block set 5 intrinsic displacement speed.
In lever proportion adjustment subtense angle, slide block in connecting rod A6 upper end and connecting rod is rigidly connected by screw thread, lower end is connected with slide block A17 by pin A7, joint is a cylindrical hinge, moved up and down together with the slide block in connecting rod by connecting rod A6, band movable slider A17 moves on lever 8.Lever 8 long enough and lever support 18 are interference fit, and lever support 18 is connected with ball screw nut support 9 upper end by pin C19, and joint forms a cylindrical hinge.The bottom of ball screw nut support 9 is fixed by screws in above slide block C11, and middle part is connected with ball nut 20 by screw.Actuating motor 29 drives ball screw 21 to rotate by coupling B28, then ball screw nut support 9 driven rod bearing 18, move left and right with the lever 8 of lever support 18 interference fit, thus have adjusted the work fulcrum of lever 8, realize the proportion adjustment of lever system.Be elected to after reserving the work fulcrum of lever 8, slide block A17 moves on lever 8, and drive lever 8 around work fulcrum, the slide block B 26 then realizing lever 8 the other end is moved on lever 8 simultaneously.And connecting rod B24 one end and slide block B 26 are connected with cylindrical hinge form by pin B25, the other end is rigidly connected with thread forms and oil hydraulic cylinder 23 input end.The motion of slide block B 26, drives the moving up and down of connecting rod B24, thus the motion of slide block that will exchange in driver sub-system, after online scale amplifying/reduce, is delivered in communication flow output subsystem.By and cooperation between the slide block C11 that connects rigidly of ball screw nut support 9 and the guide rail 12 being fixed on above support baseboard 31, ensure that the stationarity in fulcrum adjustment process, simultaneously on fulcrum be forced through ball screw nut support 9 and slide block 11 is applied on guide rail 12, ensure the straightness accuracy of leading screw, improve the accuracy that fulcrum regulates.
In communication flow output subsystem, oil hydraulic cylinder 23 is fixed on above dunnage B22, and its input end is connected with the connecting rod B24 in lever proportion adjustment subtense angle by screw thread.Connecting rod B24 drives the sinusoidal regular movement of piston displacement speed according to zoom in/out certain multiple of oil hydraulic cylinder 23.Thus by the slide block in interchange driver sub-system in slide block set 5 sinusoidal displacement velocity variations, in real time, dynamically, online, pass to the piston of oil hydraulic cylinder 23 after Linear Amplifer/reduce any multiple, the output terminal realizing oil hydraulic cylinder 23 accurately exports the communication flow of setting.
As shown in accompanying drawing 1 ~ 5, during assembling, part kerosene cleans, and dries rear matching surface oiling, and each part not finished surface should clean up, removing burr, applying preventive by dipping paint.This device, primarily of three cover subtense angle compositions, is exchange driver sub-system, communication flow output subsystem, lever proportion adjustment subtense angle respectively.As shown in Figure 1, dunnage A1, dunnage B22 are fixed on wall, are respectively used to exchange driver sub-system, communication flow output subsystem, and support baseboard 22 is fixed on ground for support lever proportion adjustment subtense angle.Slide block set 5, the dynamic bearing supporting base 13 that rolls left, right roller bearings seat 15 are fixed on above dunnage A1, for supporting connecting rod.Be fixed on above dunnage B22 by oil hydraulic cylinder 23, input end is driven by connecting rod B24.Support that collateral holder assembly 10 and fixed side mounting assembly 27 are fixed on above support baseboard 31, be used for back-up roller ballscrew 8, guide rail 12 is also fixed on above support baseboard 31, and slide block C11 can be horizontally slipped in the above.
Angle between adjustment lever 8 and support baseboard 31, make its axis parallel with the supporting surface of support baseboard 31, actuating motor 29 adopts high precision position control mode, and umber of pulse is 10000/circle, the pitch of leading screw adopts 5mm, has higher movement velocity and position control accuracy.Start actuating motor 31, drive ball screw 21 to rotate by coupling 28, then drive lever 8, ball screw nut support 9, lever support 18, ball screw nut support 19, ball nut 20, slide block 11 integral left moves right.Balance pivot with the Distance geometry of the axis of slide block set 5 with the ratio of the distance of oil hydraulic cylinder 23 axis, the multiple of online exactly scale amplifying/reduce, this ratio is greater than 1, and lever proportion adjustment subtense angle is amplifying system, otherwise, be reduction system.This ratio of accurate adjustment, can realize the accurate zoom in/out of lever proportion adjustment subtense angle, and actuating motor 31 precision is higher, this definite value is more accurate.
After completing online scale amplifying/minification adjustment, actuating motor 4, it is made to drive crank 14 to rotate by coupling A3, crank 14 is rotated through connecting rod 16 and is with movable slider to move sinusoidally in slide block set 5 intrinsic displacement speed, moved driving connecting rod B24 after sinusoidal motion zoom in/out certain multiple by lever proportion adjustment subtense angle, then the sinusoidal regular movement of piston displacement speed according to zoom in/out certain multiple of oil hydraulic cylinder 23 is made, thus realize slide block to produce the motion of sinusoidal displacement speed at slide block set 5, in real time, dynamically, online, the input end of oil hydraulic cylinder 23 is delivered to after Linear Amplifer/reduce any multiple, oil hydraulic cylinder output terminal is made accurately to produce the communication flow of setting.
In addition, by and cooperation between the slide block C11 that connects rigidly of ball screw nut support 9 and the guide rail 12 being fixed on above support baseboard 31, ensure that the stationarity in fulcrum adjustment process, simultaneously on fulcrum be forced through ball screw nut support 9 and slide block 11 is applied on guide rail 12, ensure the straightness accuracy of leading screw, improve the accuracy that fulcrum regulates.This measuring device structure is dexterous, easy to operate, low cost of manufacture, has higher using value.
Claims (1)
1. the control gear of an online exchange flow proportional adjustment, comprise dunnage A (1), motor support base (2), coupling A (3), motor (4), slide block set (5), connecting rod A (6), pin A (7), lever (8), ball screw nut support (9), support collateral holder assembly (10), slide block C (11), guide rail (12), roll left dynamic bearing supporting base (13), crank (14), right roller bearings seat (15), connecting rod (16), slide block A (17), lever support (18), pin C (19), ball nut (20), ball screw (21), dunnage B (22), oil hydraulic cylinder (23), connecting rod B (24), pin B (25), slide block B (26), fixed side supporting assembly (27), coupling B (28), actuating motor (29), actuating motor bearing (30), support baseboard (31),
It is characterized in that: dunnage A (1), dunnage B (22) are fixed on wall, be respectively used to support interchange driver sub-system and communication flow output subsystem; Support baseboard (31) is fixed on ground, for support lever proportion adjustment subtense angle; Roll left dynamic bearing supporting base (13) and right roller bearings seat (15) is fixed on dunnage A (1) for supporting crank (14), the motor (4) be fixed on motor support base (2) is connected with crank (14) by coupling A (3), crank (14), connecting rod (16), be fixed on the slide block set (5) above dunnage A (1) and slide block composition connecting rod, the circular movement band movable slider of crank (14) does sinusoidal regular movement in slide block set (5); Slide block in connecting rod A (6) upper end and connecting rod is rigidly connected by screw thread, lower end is connected with slide block A (17) by pin A (7), moved up and down together by the slide block in connecting rod A (6) and connecting rod, band movable slider A (17) is in the upper motion of lever (8); Lever (8) and lever support (18) are interference fit, and lever support (18) is connected with ball screw nut support (9) upper end by pin C (19); The bottom of ball screw nut support (9) is fixed by screws in above the slide block C (11) that can be free to slide on guide rail (12), and middle part is connected with ball nut (20) by screw; Support that collateral holder assembly (10) and fixed side supporting assembly (27) are fixed on above support baseboard (31), for the ball screw (21) supported and ball nut (20) coordinates; The actuating motor (29) being fixed on actuating motor bearing (30) drives ball screw (21) to rotate by coupling B (28), by ball screw nut support (9) driven rod bearing (18), lever (8) moves left and right, and realizes the adjustment of the work fulcrum of lever (8); Be elected to after reserving the work fulcrum of lever (8), slide block A (17) is in the upper motion of lever (8), drive lever (8) around work fulcrum simultaneously, drive the slide block B (26) of lever (8) the other end in the upper motion of lever (8); Connecting rod B (24) one end is connected by pin B (25) with slide block B (26), and the other end is rigidly connected with thread forms and oil hydraulic cylinder (23) input end; The motion of slide block B (26), drive moving up and down of connecting rod B (24), the piston that the upper oil hydraulic cylinder (23) of dunnage B (22) is fixed in drive does the sinusoidal regular movement of zoom in/out, by sinusoidal displacement in slide block set (5) of the slide block that exchanges in driver sub-system or velocity variations, after online scale amplifying/reduce, pass to the piston of oil hydraulic cylinder (23), the output terminal realizing oil hydraulic cylinder (23) accurately exports the communication flow of setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510191708.4A CN104879340B (en) | 2015-04-20 | 2015-04-20 | Alternating-current flow proportion regulation control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510191708.4A CN104879340B (en) | 2015-04-20 | 2015-04-20 | Alternating-current flow proportion regulation control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104879340A true CN104879340A (en) | 2015-09-02 |
| CN104879340B CN104879340B (en) | 2017-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510191708.4A Expired - Fee Related CN104879340B (en) | 2015-04-20 | 2015-04-20 | Alternating-current flow proportion regulation control device |
Country Status (1)
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| CN (1) | CN104879340B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109915424A (en) * | 2019-04-22 | 2019-06-21 | 江苏师范大学 | A kind of arm of force adjustable lever formula electromagnetism valve-controlled cylinder hydraulic transformer |
| CN112253821A (en) * | 2020-11-05 | 2021-01-22 | 中国矿业大学 | Fast-assembling combined liquid supply valve, use method and fast splicing method |
| CN113424721A (en) * | 2021-07-26 | 2021-09-24 | 四川省烟草公司泸州市公司 | Automatic quantity control sprayer for tobacco bud inhibition and pesticide application |
| CN114486063A (en) * | 2021-12-30 | 2022-05-13 | 大庆师范学院 | Anti-vibration pressure gauge detection device and control method thereof |
| CN114811117A (en) * | 2022-02-24 | 2022-07-29 | 浙江工业大学 | High-frequency one-way sinusoidal flow control valve |
-
2015
- 2015-04-20 CN CN201510191708.4A patent/CN104879340B/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109915424A (en) * | 2019-04-22 | 2019-06-21 | 江苏师范大学 | A kind of arm of force adjustable lever formula electromagnetism valve-controlled cylinder hydraulic transformer |
| CN112253821A (en) * | 2020-11-05 | 2021-01-22 | 中国矿业大学 | Fast-assembling combined liquid supply valve, use method and fast splicing method |
| CN112253821B (en) * | 2020-11-05 | 2021-07-30 | 中国矿业大学 | Fast-assembling combined liquid supply valve, use method and fast splicing method |
| WO2022095304A1 (en) * | 2020-11-05 | 2022-05-12 | 中国矿业大学 | Fast-assembly combined liquid supply valve, usage method, and fast assembly method |
| CN113424721A (en) * | 2021-07-26 | 2021-09-24 | 四川省烟草公司泸州市公司 | Automatic quantity control sprayer for tobacco bud inhibition and pesticide application |
| CN113424721B (en) * | 2021-07-26 | 2023-10-10 | 四川省烟草公司泸州市公司 | Tobacco bud suppression and pesticide application automatic quantity control sprayer |
| CN114486063A (en) * | 2021-12-30 | 2022-05-13 | 大庆师范学院 | Anti-vibration pressure gauge detection device and control method thereof |
| CN114486063B (en) * | 2021-12-30 | 2024-01-26 | 大庆师范学院 | Anti-vibration pressure gauge detection device and control method thereof |
| CN114811117A (en) * | 2022-02-24 | 2022-07-29 | 浙江工业大学 | High-frequency one-way sinusoidal flow control valve |
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| Publication number | Publication date |
|---|---|
| CN104879340B (en) | 2017-01-11 |
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Granted publication date: 20170111 Termination date: 20190420 |