CN108895047B - Intelligent gas-liquid actuating mechanism - Google Patents
Intelligent gas-liquid actuating mechanism Download PDFInfo
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- CN108895047B CN108895047B CN201811088935.4A CN201811088935A CN108895047B CN 108895047 B CN108895047 B CN 108895047B CN 201811088935 A CN201811088935 A CN 201811088935A CN 108895047 B CN108895047 B CN 108895047B
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- valve
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- oil
- hydraulic cylinder
- feedback device
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- 230000007246 mechanism Effects 0.000 title claims abstract description 29
- 239000007788 liquid Substances 0.000 title claims abstract description 23
- 238000003745 diagnosis Methods 0.000 claims description 14
- 238000006073 displacement reaction Methods 0.000 claims description 8
- 239000003921 oil Substances 0.000 description 28
- 239000010720 hydraulic oil Substances 0.000 description 13
- 230000008859 change Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 101000623895 Bos taurus Mucin-15 Proteins 0.000 description 4
- 230000009471 action Effects 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
-
- 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
-
- 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
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
- F15B19/005—Fault detection or monitoring
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention belongs to the field of intelligent control equipment, and particularly relates to an intelligent gas-liquid executing mechanism, which comprises a gas source, a stroke feedback device, a pneumatic controller, a pneumatic motor, a hydraulic pump, an electromagnetic reversing valve and a valve block, wherein the gas source is connected with the pneumatic motor; the hydraulic pump is driven by the pneumatic motor, one end of the hydraulic pump is connected with an oil tank, the other end of the hydraulic pump is communicated with an oil inlet of a one-way valve, an oil outlet of the one-way valve is communicated with an oil inlet of an electromagnetic reversing valve, a working oil port of the electromagnetic reversing valve is communicated with a spring reset hydraulic cylinder, and a piston rod of the spring reset hydraulic cylinder is connected with a valve block for controlling the opening and closing of the valve; and a piston rod of the spring return hydraulic cylinder is in signal connection with the stroke feedback device and is used for feeding back the real-time stroke of the spring return hydraulic cylinder.
Description
Technical Field
The invention belongs to the field of intelligent control equipment, and particularly relates to an intelligent gas-liquid executing mechanism.
Background
The actuator is a key component of the regulator valve. The actuating mechanism is used as a driving part for driving the regulating valve according to the control signal to regulate the medium flowing through the valve, and the actuating mechanism influences the working performance of the regulating valve to a great extent.
The executing mechanism is mainly divided into a pneumatic executing mechanism, an electric executing mechanism and a hydraulic executing mechanism according to the energy form. The pneumatic actuating mechanism has the advantages of simple structure, convenient maintenance, low price, environmental pollution resistance and the like, but the gas working medium has stronger compressibility, so that the deviation resistance of the pneumatic actuating mechanism is relatively poor, and the accurate and stable blank value of the valve position and the speed is greatly influenced. The electric actuating mechanism has high control precision, is convenient for remote signal transmission, but has poor fireproof and explosion-proof effects, and reduces the safety. The hydraulic actuating mechanism takes the high-pressure liquid which is hardly compressed as a medium for transmitting power, can output large force or moment, has stable operation, no clearance in transmission and good deviation resistance, but has high manufacturing cost and large and heavy volume.
The gas-liquid linkage actuating mechanism combines the advantages of gas and liquid through the conversion of a gas-liquid transmission mode. The high-pressure gas enters the gas-liquid tank through the control system to be converted, the isobaric hydraulic oil in the tank body is pressed into the corresponding hydraulic piston cylinder, and the piston action drives the gas-liquid linkage actuating mechanism to drive the valve to realize stable opening or closing.
However, the existing gas-liquid linkage actuator cannot perform fault analysis processing on position and pressure information in valve operation, and the structure of the driving device is divided into a shifting fork type and a rotating blade type, and the two designs can only convert linear displacement into angular displacement, so that the linear travel valve cannot be driven.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides an intelligent gas-liquid executing mechanism.
The invention is realized by the following technical scheme: an intelligent gas-liquid executing mechanism comprises a gas source, a stroke feedback device, a pneumatic controller, a pneumatic motor, a hydraulic pump, an electromagnetic reversing valve and a valve block; the hydraulic pump is driven by the pneumatic motor, one end of the hydraulic pump is connected with an oil tank, the other end of the hydraulic pump is communicated with an oil inlet of a one-way valve, an oil outlet of the one-way valve is communicated with an oil inlet of an electromagnetic reversing valve, a working oil port of the electromagnetic reversing valve is communicated with a spring reset hydraulic cylinder, and a piston rod of the spring reset hydraulic cylinder is connected with a valve block for controlling the opening and closing of the valve; and a piston rod of the spring return hydraulic cylinder is in signal connection with the stroke feedback device and is used for feeding back the real-time stroke of the spring return hydraulic cylinder.
Further, an overflow valve connected with the oil tank is arranged between the hydraulic pump and the one-way valve.
Further, the spring return hydraulic cylinder (10) is a piston cylinder or a plunger cylinder capable of outputting linear displacement and speed.
Further, an oil suction filter is arranged between the hydraulic pump and the oil tank.
Further, a pressure sensor is arranged in an oil cavity of the spring return hydraulic cylinder, the pressure sensor and the stroke feedback device are connected with a fault diagnosis system through signals, and the fault diagnosis system can output information fed back by the pressure sensor and the stroke feedback device.
Further, the hydraulic pump is a single-plunger hydraulic pump.
Further, a manual mechanism capable of controlling the cam to rotate is arranged on the single-plunger hydraulic pump.
The beneficial effects of the invention are as follows: the gas-liquid actuating mechanism adopts a spring return hydraulic cylinder, the cylinder body is a piston cylinder or a plunger cylinder, the hydraulic energy of hydraulic oil can be converted into the linear displacement of a piston, and the opening and closing of a valve are realized; compared with the existing gas-liquid linkage actuating mechanism, the valve can be matched with a straight travel valve to realize the adjustment of the straight travel valve. The gas-liquid executing mechanism is provided with a travel feedback device, a pressure sensor and a fault diagnosis system, and the fault diagnosis system can analyze and process a position signal and a pressure signal of the control valve in real time under the running state so as to carry out simple fault diagnosis.
Drawings
FIG. 1 is a schematic view of a hydraulic mechanism of the present invention;
in the figure, 1, an air source, 2, a stroke feedback device, 3, a pneumatic controller, 4, a pneumatic motor, 5, an oil absorption filter, 6, a hydraulic pump, 7, a one-way valve, 8, an overflow valve, 9, an electromagnetic directional valve, 10, a spring return hydraulic cylinder, 11, a pressure sensor, 12, a valve block, 13, a manual mechanism, 14 and a fault diagnosis system.
Detailed Description
The invention is further described below with reference to the drawings and examples.
As shown in fig. 1, an intelligent gas-liquid actuator comprises a gas source 1, a stroke feedback device 2, a pneumatic controller 3, a pneumatic motor 4, a hydraulic pump 6, an electromagnetic directional valve 9 and a valve block 12; the air source 1 is connected with the air path of the travel feedback device 2, the travel feedback device 2 is connected with the air path of the pneumatic controller 3, the air path of the pneumatic controller 3 is connected with the air path of the pneumatic motor 4, the hydraulic pump 6 is driven by the air motor 4, one end of the hydraulic pump 6 is connected with an oil tank, the other end of the hydraulic pump 6 is communicated with an oil inlet of the one-way valve 7, an oil outlet of the one-way valve 7 is communicated with an oil inlet of the electromagnetic directional valve 9, a working oil port of the electromagnetic directional valve 9 is communicated with the spring return hydraulic cylinder 10, and a piston rod of the spring return hydraulic cylinder 10 is connected with the valve block 12 for controlling the opening and closing of the valve; the piston rod of the spring return hydraulic cylinder 10 is in signal connection with the stroke feedback device 2 for feeding back the real-time stroke of the spring return hydraulic cylinder 10. The gas discharged from the gas source 1 is converted into a standard gas source suitable for the pneumatic motor 4, and the pneumatic motor 4 is supplied with a gas which is clean enough, dry enough and has a certain pressure and flow. The travel feedback device 2 comprises a feedback component I, a rolling shaft, a feedback component II, a gear I, a gear II, a potentiometer, a shaft of the potentiometer, an air source inlet, an electromagnetic valve, an air source outlet, an electric signal input connector and an electric signal output connector. In the valve closing process, given an electric signal, when the valve position received by the stroke feedback device 2 is the same as the valve position corresponding to the given electric signal, the stroke feedback device 2 is powered off. The pressure change of the hydraulic oil in the spring reset hydraulic cylinder 10 enables a piston and a piston rod in the hydraulic cylinder to move, the push rod connected with the valve block 12 is pushed to move, the feedback component I fixed on the push rod moves along with the push rod, the feedback component I drives the feedback component II to rotate through the roller, the rotating shaft fixed with the feedback component II rotates along with the feedback component II, meanwhile, the gear I drives the gear II meshed with the gear I to rotate, the gear II drives the shaft of the potentiometer to rotate, the potentiometer converts the detected position change into an electric signal to be fed back to the stroke feedback device 2, when the electric signal corresponding to the position change is identical to a given electric signal, the electric signal output by the stroke feedback device 2 is 0, the stroke feedback device 2 is automatically powered off, and the electromagnetic reversing valve 9 is powered off. The stroke feedback device 2 is internally provided with an electromagnetic valve, and when the stroke feedback device 2 is powered off, the electromagnetic valve is closed to prevent the air source 1 from being connected. The feedback principle of the valve opening process is the same as above.
Further, the spring return hydraulic cylinder 10 is a piston cylinder or a plunger cylinder which can output linear displacement and speed, and can convert the hydraulic energy of hydraulic oil into the linear displacement of a piston to realize the opening and closing of a valve.
As a modification of the present embodiment, a relief valve 8 connected to the oil tank is provided between the hydraulic pump 6 and the check valve 7. The spring of the overflow valve 8 is provided with a pre-pressure, and when the hydraulic pump 6 outputs excessive oil, the overflow valve 8 can adjust the oil pressure of the output port of the hydraulic pump 6.
Further, an oil suction filter 5 is also arranged between the hydraulic pump 6 and the oil tank. The oil suction filter 5 is arranged at the oil suction port of the hydraulic pump 6 and is used for protecting the hydraulic pump 6 and other hydraulic elements so as to avoid sucking pollution impurities, effectively control the pollution of the hydraulic system and adjust the cleanliness of the hydraulic system.
As an improvement of the embodiment, a pressure sensor 11 is disposed in the oil cavity of the spring return hydraulic cylinder 10, the pressure sensor 11 can detect pressure information of oil in the oil cavity of the spring return hydraulic cylinder 10, the pressure sensor 11 is connected with a fault diagnosis system, and can transmit pressure signals in the spring return hydraulic cylinder 10 to the fault diagnosis system 14. The stroke feedback device 2 is also in signal connection with the fault diagnosis system 14; the failure diagnosis system 14 can output information fed back by the pressure sensor 11 and the stroke feedback device 2. The stroke feedback device 2 and the pressure sensor 11 transmit displacement change signals and pressure change signals to the fault diagnosis system 14, and the CPU in the fault diagnosis system 14 calculates according to the corresponding relation between the position and the pressure, so that various parameters of the pressure sensor 11 related to the operation of the pressure and the position can be obtained, and accordingly whether the valve can work normally or not can be determined, and the possible fault of the valve can be diagnosed predictively. The technician can timely find out faults according to the feedback information so as to quickly remove the faults.
As an improvement of the present embodiment, the hydraulic pump 6 is a single-plunger hydraulic pump, and a manual mechanism 13 capable of controlling the rotation of the cam is disposed on the single-plunger hydraulic pump. When the intelligent gas-liquid executing mechanism loses gas and electricity, the manual mechanism 13 is rotated to drive the cam in the hydraulic pump 6 to rotate, so that the periodical change of the inner volume of the hydraulic pump 6 is realized, hydraulic oil is continuously sucked from the oil tank, and the hydraulic oil is output at high pressure.
The working principle of the invention is as follows: and closing the valve, and sending an instruction to the stroke feedback device and the electromagnetic reversing valve by the electric signal to enable the stroke feedback device and the electromagnetic reversing valve to work electrically. When the stroke feedback device works, gas in the gas source enters the pneumatic motor, the motor drives the hydraulic pump to work, and the hydraulic pump sends hydraulic oil in the oil tank to the electromagnetic directional valve through the one-way valve; the electromagnetic reversing valve selects a left station, at the moment, the P port is communicated with the A port, hydraulic oil flows to the spring return hydraulic cylinder, a piston rod of the spring return hydraulic cylinder moves downwards, the piston rod drives the valve block to move downwards, and the valve block closes the valve. And in the valve closing process, the spring reset hydraulic cylinder feeds back the stroke to the stroke feedback device in real time, and after the stroke feedback device and the electromagnetic reversing valve are powered off due to the fact that the electric signal is powered off after the stroke feedback device reaches the designated position. The stroke feedback device is powered off to prevent the air source from being connected and then the pneumatic motor stops running, the electromagnetic reversing valve is powered off and returns to the middle position under the action of the spring, two ports of the electromagnetic reversing valve A, B block the backflow of hydraulic oil, the hydraulic oil in the spring return hydraulic cylinder and the spring keep a relatively balanced state, the piston rod is static, and the valve is kept in position.
And opening the valve, sending an instruction to the electromagnetic directional valve by an electric signal, enabling the electromagnetic directional valve to work electrically, selecting a right station by the electromagnetic directional valve, connecting an opening A with an opening T at the moment, returning hydraulic oil to the oil tank, lifting a piston rod under the action of a spring of the spring reset hydraulic cylinder, lifting a valve block, and opening the valve. In the valve opening process, the spring reset hydraulic cylinder feeds back the stroke in real time to the stroke feedback device, after the spring reset hydraulic cylinder reaches a designated position, the electric signal is powered off, so that the electromagnetic directional valve is powered off, the electromagnetic directional valve is reset to the middle position under the action of the spring, two ports of the electromagnetic directional valve A, B block the backflow of hydraulic oil, the hydraulic oil in the spring reset hydraulic cylinder and the spring are kept in a relatively balanced state, the piston rod is static, and the valve is kept.
Claims (5)
1. An intelligent gas-liquid actuating mechanism which is characterized in that: the device comprises an air source (1), a stroke feedback device (2), a pneumatic controller (3), a pneumatic motor (4), a hydraulic pump (6), an electromagnetic reversing valve (9) and a valve block (12);
the air source (1) is connected with the air circuit of the pneumatic controller (3), the travel feedback device (2) is connected with the air circuit of the pneumatic controller (3), the pneumatic controller (3) is connected with the air circuit of the pneumatic motor (4), the hydraulic pump (6) is driven by the pneumatic motor (4), one end of the hydraulic pump (6) is connected with an oil tank, the other end of the hydraulic pump (6) is communicated with an oil inlet of the one-way valve (7), an oil outlet of the one-way valve (7) is communicated with an oil inlet of the electromagnetic directional valve (9), a working oil port of the electromagnetic directional valve (9) is communicated with the spring return hydraulic cylinder (10), and a piston rod of the spring return hydraulic cylinder (10) is connected with the valve block (12) for controlling the opening and closing of the valve; the piston rod of the spring return hydraulic cylinder (10) is in signal connection with the stroke feedback device (2) and is used for feeding back the real-time stroke of the spring return hydraulic cylinder (10);
an oil suction filter (5) is arranged between the hydraulic pump (6) and the oil tank;
the oil cavity of the spring return hydraulic cylinder (10) is internally provided with a pressure sensor (11), the pressure sensor (11) and the stroke feedback device (2) are both connected with a fault diagnosis system (14) through signals, and the fault diagnosis system (14) can output information fed back by the pressure sensor (11) and the stroke feedback device (2).
2. The intelligent gas-liquid actuator of claim 1, wherein: an overflow valve (8) connected with an oil tank is arranged between the hydraulic pump (6) and the one-way valve (7).
3. The intelligent gas-liquid actuator of claim 1, wherein: the spring return hydraulic cylinder (10) is a piston cylinder or a plunger cylinder which can output linear displacement and speed.
4. An intelligent gas-liquid actuator according to any one of claims 1 to 3, wherein: the hydraulic pump (6) is a single-plunger hydraulic pump.
5. The intelligent gas-liquid actuator of claim 4, wherein: the single plunger hydraulic pump is provided with a manual mechanism (13) capable of controlling the cam to rotate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811088935.4A CN108895047B (en) | 2018-09-18 | 2018-09-18 | Intelligent gas-liquid actuating mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811088935.4A CN108895047B (en) | 2018-09-18 | 2018-09-18 | Intelligent gas-liquid actuating mechanism |
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| Publication Number | Publication Date |
|---|---|
| CN108895047A CN108895047A (en) | 2018-11-27 |
| CN108895047B true CN108895047B (en) | 2024-04-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811088935.4A Active CN108895047B (en) | 2018-09-18 | 2018-09-18 | Intelligent gas-liquid actuating mechanism |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2753915Y (en) * | 2004-12-31 | 2006-01-25 | 杭州和利时自动化有限公司 | Self-tolerant electrohydraulic actuator and its integrated oil way block |
| CN106438592A (en) * | 2016-09-07 | 2017-02-22 | 许继集团有限公司 | Hydraulic tightening device and control system thereof |
| CN107366645A (en) * | 2017-08-05 | 2017-11-21 | 苏州方德锐精密机电科技有限公司 | A kind of abrasive Flow polishes machine hydraulic power system |
| CN107387593A (en) * | 2017-09-02 | 2017-11-24 | 吉林大学 | Motor-direct-drive type clutch electric-controlled hydraulic executing agency and its control method |
| CN108131341A (en) * | 2017-12-25 | 2018-06-08 | 扬州电力设备修造厂有限公司 | The adjustment method of the electrohydraulic actuator of one key automatic debugging system, its driving method and the debugging system |
| CN208749699U (en) * | 2018-09-18 | 2019-04-16 | 徐州阿卡控制阀门有限公司 | A kind of Intelligent gas-liquid executing agency |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120321833A1 (en) * | 2011-10-24 | 2012-12-20 | Alan Ekquist | Programmable pellet press |
-
2018
- 2018-09-18 CN CN201811088935.4A patent/CN108895047B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2753915Y (en) * | 2004-12-31 | 2006-01-25 | 杭州和利时自动化有限公司 | Self-tolerant electrohydraulic actuator and its integrated oil way block |
| CN106438592A (en) * | 2016-09-07 | 2017-02-22 | 许继集团有限公司 | Hydraulic tightening device and control system thereof |
| CN107366645A (en) * | 2017-08-05 | 2017-11-21 | 苏州方德锐精密机电科技有限公司 | A kind of abrasive Flow polishes machine hydraulic power system |
| CN107387593A (en) * | 2017-09-02 | 2017-11-24 | 吉林大学 | Motor-direct-drive type clutch electric-controlled hydraulic executing agency and its control method |
| CN108131341A (en) * | 2017-12-25 | 2018-06-08 | 扬州电力设备修造厂有限公司 | The adjustment method of the electrohydraulic actuator of one key automatic debugging system, its driving method and the debugging system |
| CN208749699U (en) * | 2018-09-18 | 2019-04-16 | 徐州阿卡控制阀门有限公司 | A kind of Intelligent gas-liquid executing agency |
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| CN108895047A (en) | 2018-11-27 |
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