CN111416588B - Wind head and wind power self-stabilizing system of film blowing machine - Google Patents
Wind head and wind power self-stabilizing system of film blowing machine Download PDFInfo
- Publication number
- CN111416588B CN111416588B CN202010303751.6A CN202010303751A CN111416588B CN 111416588 B CN111416588 B CN 111416588B CN 202010303751 A CN202010303751 A CN 202010303751A CN 111416588 B CN111416588 B CN 111416588B
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- operational amplifier
- resistor
- input end
- wind
- inverting input
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- 238000010096 film blowing Methods 0.000 title claims abstract description 16
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 11
- 238000001914 filtration Methods 0.000 claims abstract description 10
- 238000007664 blowing Methods 0.000 claims abstract description 9
- 238000011105 stabilization Methods 0.000 claims abstract description 6
- 239000003990 capacitor Substances 0.000 claims description 26
- 238000001514 detection method Methods 0.000 claims description 15
- 239000002245 particle Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000006641 stabilisation Effects 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 229920006257 Heat-shrinkable film Polymers 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/45—Differential amplifiers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/28—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of blown tubular films, e.g. by inflation
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
- Measuring Volume Flow (AREA)
Abstract
The invention discloses a wind head and wind power self-stabilization system of a film blowing machine, which comprises a wind head, a fan and a control cabinet, wherein the fan is connected with a wind power input end of the wind head through a blowing pipeline, an electric control air valve is arranged on the blowing pipeline, a flow sensor is arranged at an air outlet of the wind head, a controller and a flow signal processing unit are arranged in the control cabinet, the flow signal processing unit comprises a differential amplifying circuit, a filtering adjusting circuit and a voltage stabilizing comparison circuit which are sequentially connected, the input end of the differential amplifying circuit is connected with the flow sensor, and the output end of the voltage stabilizing comparison circuit is connected with the controller.
Description
Technical Field
The invention relates to the technical field of film blowing equipment, in particular to a wind head wind power self-stabilizing system of a film blowing machine.
Background
The production of the heat-shrinkable film is to add dry polyethylene particles into the equipment, enter the screw from the hopper by the weight of the particles, push the plastic particles forward by the screw, and gradually melt the plastic particles due to friction between the plastic and the screw and between the particles and collision friction among the particles in the pushing process and also due to external heating of the charging barrel. The melted plastic is filtered by a machine head to remove impurities, and is discharged from a die head die opening, cooled by an air ring, blown by a lambdoidal plate, pulled by a roller, and coiled into a cylinder. The existing film blowing machine is provided with a U-shaped frame and a rotating plate in a blowing pipeline, the size of film blowing air flow is adjusted by rotating the rotating plate, but the mechanical mode is adopted to adjust the film blowing machine to have the defects of low precision, inconvenient adjustment and the like, and the film blowing machine cannot automatically adjust under the unstable state of a fan air source to enable the air force to be stable, so that the film blowing quality is influenced.
The present invention provides a new solution to this problem.
Disclosure of Invention
Aiming at the situation, in order to overcome the defects of the prior art, the invention aims to provide a wind head wind power self-stabilizing system of a film blowing machine.
The technical scheme for solving the problems is as follows: the utility model provides a inflation film manufacturing machine wind head wind-force self stabilization system, includes wind head, fan and switch board, the fan passes through the pipeline of blowing and connects the wind power input of wind head, set up the automatically controlled pneumatic valve on the pipeline of blowing, wind head air outlet department sets up flow sensor, set up controller and flow signal processing unit in the switch board, flow signal processing unit is including differential amplifier circuit, filter adjustment circuit and the steady voltage comparison circuit that connects gradually, differential amplifier circuit's input is connected flow sensor, steady voltage comparison circuit's output is connected the controller, the controller is used for adjusting the aperture of automatically controlled pneumatic valve; the differential amplifying circuit comprises an operational amplifier AR1, wherein the non-inverting input end of the operational amplifier AR1 is connected with a resistor R2 and one end of a capacitor C2, the other end of the resistor R2 is connected with one end of the capacitor C1, and is connected with the positive output end of the flow sensor through the resistor R1, and the other ends of the capacitor C1 and the capacitor C2, the inverting input end of the operational amplifier AR1 and the negative output end of the flow sensor are grounded; the filter adjusting circuit comprises an operational amplifier AR2, wherein an inverting input end of the operational amplifier AR2 is connected with a resistor R5 and one end of a capacitor C3, an in-phase input end of the operational amplifier AR2 is grounded, an output end of the operational amplifier AR2 is connected with one end of a resistor R6, the other end of the resistor R5 is connected with the other end of the resistor R6 and one ends of resistors R7, R8 and a capacitor C4, the other ends of the capacitors C3 and C4 are connected with one ends of the resistors R3, R4 and R10, the other end of the resistor R3 is connected with an output end of the operational amplifier AR1, the other end of the resistor R4 is grounded, the other end of the resistor R8 is connected with an in-phase input end of the operational amplifier AR3, the inverting input end of the operational amplifier AR3 is connected with the output end of the operational amplifier AR3 and the other end of the resistor R10 through a resistor R9, and the other end of the resistor R7 is grounded through the capacitor C5.
Further, the voltage stabilizing comparison circuit comprises an operational amplifier AR4, the non-inverting input end of the operational amplifier AR4 is connected with the other end of the resistor R7, the inverting input end and the output end of the operational amplifier AR4 are connected with the inverting input end of the operational amplifier AR5, the non-inverting input end of the operational amplifier AR5 is connected with a pin 3 of a rheostat RP1, the pin 1 of the rheostat RP1 is connected with a +5V power supply through a resistor R11, a pin 2 of the rheostat RP1 is grounded, and the output end of the operational amplifier AR5 is connected with a flow detection end of the controller.
Through the technical scheme, the invention has the beneficial effects that:
1. according to the invention, the flow sensor is arranged at the air outlet of the air head to detect the air flow of the air outlet, and the flow signal processing unit is designed to process the detection signal, so that the flow detection precision is effectively improved, the control precision of the controller on the electric control air valve is improved, and the stability of the wind power of the air blower is ensured;
2. the invention has high degree of automation and high adjustment precision, can provide stable wind power under the condition of unstable wind source of the fan, and greatly improves the film blowing quality.
Drawings
Fig. 1 is a schematic diagram of a differential amplifying circuit of the present invention.
Fig. 2 is a schematic diagram of an adjustable stabilization circuit according to the present invention.
Fig. 3 is a schematic diagram of a voltage stabilizing comparison circuit according to the present invention.
Description of the embodiments
The foregoing and other features, aspects and advantages of the present invention will become more apparent from the following detailed description of the embodiments, which proceeds with reference to the accompanying figures 1-3. The following embodiments are described in detail with reference to the drawings.
Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.
The utility model provides a film blowing machine wind head wind-force self stabilization system, includes wind head, fan and switch board, and the fan passes through the wind-force input of blowing pipeline connection wind head, sets up automatically controlled pneumatic valve on the pipeline of blowing, and wind head air outlet department sets up flow sensor P1. The flow signal processing unit of the controller is arranged in the control cabinet and comprises a differential amplifying circuit, a filtering adjusting circuit and a voltage stabilizing comparison circuit which are sequentially connected, the input end of the differential amplifying circuit is connected with the flow sensor P1, the output end of the voltage stabilizing comparison circuit is connected with the controller, and the controller is used for adjusting the opening of the electric control air valve.
The flow sensor P1 is used for detecting the air flow at the air outlet of the air head, converting the air flow into an electric signal and sending the electric signal into the flow signal processing unit for processing. As shown in fig. 1, the differential amplifying circuit includes an operational amplifier AR1, wherein the non-inverting input end of the operational amplifier AR1 is connected with a resistor R2 and one end of a capacitor C2, the other end of the resistor R2 is connected with one end of the capacitor C1, and is connected with the positive output end of the flow sensor P1 through the resistor R1, and the other ends of the capacitor C1 and the capacitor C2, the inverting input end of the operational amplifier AR1 and the negative output end of the flow sensor P1 are all grounded.
The resistor R2, the capacitor C1 and the capacitor C2 form a pi-type RC filter to perform low-pass filtering on the detection signal of the flow sensor P1, so that high-frequency interference generated by external wind disturbance on the flow detection signal is avoided, and then the high-frequency interference is sent into the operational amplifier AR1 to perform differential amplification, so that common-mode interference generated by the output signal of the flow sensor P1 is effectively restrained, and signal amplification noise is reduced.
The detection signal amplified by the operational amplifier AR1 is sent to a filtering and adjusting circuit for processing, as shown in fig. 2, the filtering and adjusting circuit includes an operational amplifier AR2, an inverting input end of the operational amplifier AR2 is connected with a resistor R5 and one end of a capacitor C3, an inverting input end of the operational amplifier AR2 is grounded, an output end of the operational amplifier AR2 is connected with one end of a resistor R6, the other end of the resistor R5 is connected with the other end of the resistor R6, one ends of the resistors R7, R8 and one end of the capacitor C4, the other ends of the capacitors C3 and C4 are connected with one ends of the resistors R3, R4 and the other end of the resistor R3 are connected with the output end of the operational amplifier AR1, the inverting input end of the operational amplifier AR3 is connected with the output end of the operational amplifier AR3 and the other end of the resistor R10 through a resistor R9, and the other end of the resistor R7 is grounded through the capacitor C5.
The operational amplifier AR2 and the second-stage RC filter network of the inverting input end form a band-pass filter, the output signal of the operational amplifier AR1 is subjected to frequency selection filtering by utilizing the principle of the band-pass filter, and the center frequency of the band-pass filter is consistent with the frequency of the output signal of the flow sensor P1, so that the interference frequency of internal and external noise interference on gas flow detection is effectively eliminated. The output signal of the operational amplifier AR2 is sent into the operational amplifier AR3 for operational amplifier feedback after being shunted by a resistor, thereby effectively improving the band-pass filtering effect and the air flow detection precision.
The detection signal after band-pass filtering is further RC filtered and then sent to a voltage stabilizing comparison circuit, as shown in fig. 3, the voltage stabilizing comparison circuit comprises an operational amplifier AR4, the non-inverting input end of the operational amplifier AR4 is connected with the other end of a resistor R7, the inverting input end and the output end of the operational amplifier AR4 are connected with the inverting input end of an operational amplifier AR5, the non-inverting input end of the operational amplifier AR5 is connected with a pin 3 of a rheostat RP1, a pin 1 of the rheostat RP1 is connected with a +5v power supply through a resistor R11, a pin 2 of the rheostat RP1 is grounded, and the output end of the operational amplifier AR5 is connected with a flow detection end of a controller.
The operational amplifier AR4 performs isolation and stable output on the output signal of the filtering and adjusting circuit by utilizing a voltage follower principle, then sends the output signal into the operational amplifier AR5 for comparison and shaping to obtain a standard 0-5V detection signal required by the controller, and finally calculates the flow value at the air outlet of the air outlet head after the internal A/D conversion and waveform analysis of the controller CPU.
When the invention is specifically used, the flow sensor P1 detects the air flow at the air outlet of the air head in real time, the detection signal is processed by the flow signal processing unit and then is sent to the controller for operation, so that the flow value at the air outlet of the air head is obtained, the controller compares the flow value with the preset value of the system, and the opening of the electric control air valve is correspondingly regulated according to the comparison result, so that the air flow at the air outlet of the air head always meets the preset requirement of the system, and the purpose of self-stabilization of the wind power of the air head is realized.
In summary, the flow sensor is arranged at the air outlet of the air head to detect the flow of the air outlet, and the flow signal processing unit is designed to process the detection signal, so that the flow detection precision is effectively improved, the control precision of the controller on the electric control air valve is improved, and the stability of the wind power of the fan is ensured. The invention has high degree of automation and high adjustment precision, can provide stable wind power under the condition of unstable wind source of the fan, and greatly improves the film blowing quality.
While the invention has been described in connection with certain embodiments, it is not intended that the invention be limited thereto; for those skilled in the art to which the present invention pertains and the related art, on the premise of based on the technical scheme of the present invention, the expansion, the operation method and the data replacement should all fall within the protection scope of the present invention.
Claims (2)
1. The utility model provides a film blowing machine wind head wind-force self-stabilization system, includes wind head, fan and switch board, its characterized in that: the fan is connected with a wind power input end of the wind head through a blowing pipeline, an electric control air valve is arranged on the blowing pipeline, a flow sensor is arranged at an air outlet of the wind head, a controller and a flow signal processing unit are arranged in the control cabinet, the flow signal processing unit comprises a differential amplifying circuit, a filtering and adjusting circuit and a voltage stabilizing comparison circuit which are sequentially connected, the input end of the differential amplifying circuit is connected with the flow sensor, the output end of the voltage stabilizing comparison circuit is connected with the controller, and the controller is used for adjusting the opening of the electric control air valve;
the differential amplifying circuit comprises an operational amplifier AR1, wherein the non-inverting input end of the operational amplifier AR1 is connected with a resistor R2 and one end of a capacitor C2, the other end of the resistor R2 is connected with one end of the capacitor C1, and is connected with the positive output end of the flow sensor through the resistor R1, and the other ends of the capacitor C1 and the capacitor C2, the inverting input end of the operational amplifier AR1 and the negative output end of the flow sensor are grounded;
the filter adjusting circuit comprises an operational amplifier AR2, wherein an inverting input end of the operational amplifier AR2 is connected with a resistor R5 and one end of a capacitor C3, an in-phase input end of the operational amplifier AR2 is grounded, an output end of the operational amplifier AR2 is connected with one end of a resistor R6, the other end of the resistor R5 is connected with the other end of the resistor R6 and one ends of resistors R7, R8 and a capacitor C4, the other ends of the capacitors C3 and C4 are connected with one ends of the resistors R3, R4 and R10, the other end of the resistor R3 is connected with an output end of the operational amplifier AR1, the other end of the resistor R4 is grounded, the other end of the resistor R8 is connected with an in-phase input end of the operational amplifier AR3, the inverting input end of the operational amplifier AR3 is connected with the output end of the operational amplifier AR3 and the other end of the resistor R10 through a resistor R9, and the other end of the resistor R7 is grounded through the capacitor C5.
2. The self-stabilizing system for wind head and wind force of film blowing machine according to claim 1, wherein: the voltage stabilizing comparison circuit comprises an operational amplifier AR4, wherein the non-inverting input end of the operational amplifier AR4 is connected with the other end of a resistor R7, the inverting input end and the output end of the operational amplifier AR4 are connected with the inverting input end of an operational amplifier AR5, the non-inverting input end of the operational amplifier AR5 is connected with a pin 3 of a rheostat RP1, the pin 1 of the rheostat RP1 is connected with a +5V power supply through a resistor R11, a pin 2 of the rheostat RP1 is grounded, and the output end of the operational amplifier AR5 is connected with a flow detection end of the controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010303751.6A CN111416588B (en) | 2020-04-17 | 2020-04-17 | Wind head and wind power self-stabilizing system of film blowing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010303751.6A CN111416588B (en) | 2020-04-17 | 2020-04-17 | Wind head and wind power self-stabilizing system of film blowing machine |
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| Publication Number | Publication Date |
|---|---|
| CN111416588A CN111416588A (en) | 2020-07-14 |
| CN111416588B true CN111416588B (en) | 2024-01-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010303751.6A Active CN111416588B (en) | 2020-04-17 | 2020-04-17 | Wind head and wind power self-stabilizing system of film blowing machine |
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| Country | Link |
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| CN (1) | CN111416588B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5525277A (en) * | 1992-04-13 | 1996-06-11 | Joseph; Daniel R. | Method and apparatus for cooling extruded film tubes |
| JP2008155568A (en) * | 2006-12-26 | 2008-07-10 | Placo Co Ltd | Foam blow molding method and foam blow molding machine for executing it |
| CN201645813U (en) * | 2009-12-31 | 2010-11-24 | 广州市国研机械设备制造有限公司 | Ultrasonic testing automatic air-compensating device for film blowing machine |
| CN202517717U (en) * | 2012-05-10 | 2012-11-07 | 广州市金威龙实业股份有限公司 | Automatic control cooling device of molded film of film blowing machine |
| CN204392204U (en) * | 2015-02-06 | 2015-06-10 | 国家电网公司 | A kind of ultra-weak electronic signal low-power consumption filter circuit |
| CN205546068U (en) * | 2016-03-01 | 2016-08-31 | 厦门羽星科技股份有限公司 | Three -dimensional LED show equipment of modified |
| CN207200704U (en) * | 2017-09-07 | 2018-04-06 | 深圳市天易成科技有限公司 | A kind of optical port card of optical gate computer inner-external network 10,000,000,000 |
| CN207688915U (en) * | 2018-01-05 | 2018-08-03 | 哈尔滨理工大学 | A kind of Machine Vision Inspecting System |
| CN207717164U (en) * | 2017-12-26 | 2018-08-10 | 重庆电子工程职业学院 | The detection of gas flow rate circuit of ultrasonic probe poll is realized based on analog switch |
| CN209746382U (en) * | 2019-03-11 | 2019-12-06 | 河南世贤纺织科技有限公司 | Energy-saving circuit of setting machine |
-
2020
- 2020-04-17 CN CN202010303751.6A patent/CN111416588B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5525277A (en) * | 1992-04-13 | 1996-06-11 | Joseph; Daniel R. | Method and apparatus for cooling extruded film tubes |
| JP2008155568A (en) * | 2006-12-26 | 2008-07-10 | Placo Co Ltd | Foam blow molding method and foam blow molding machine for executing it |
| CN201645813U (en) * | 2009-12-31 | 2010-11-24 | 广州市国研机械设备制造有限公司 | Ultrasonic testing automatic air-compensating device for film blowing machine |
| CN202517717U (en) * | 2012-05-10 | 2012-11-07 | 广州市金威龙实业股份有限公司 | Automatic control cooling device of molded film of film blowing machine |
| CN204392204U (en) * | 2015-02-06 | 2015-06-10 | 国家电网公司 | A kind of ultra-weak electronic signal low-power consumption filter circuit |
| CN205546068U (en) * | 2016-03-01 | 2016-08-31 | 厦门羽星科技股份有限公司 | Three -dimensional LED show equipment of modified |
| CN207200704U (en) * | 2017-09-07 | 2018-04-06 | 深圳市天易成科技有限公司 | A kind of optical port card of optical gate computer inner-external network 10,000,000,000 |
| CN207717164U (en) * | 2017-12-26 | 2018-08-10 | 重庆电子工程职业学院 | The detection of gas flow rate circuit of ultrasonic probe poll is realized based on analog switch |
| CN207688915U (en) * | 2018-01-05 | 2018-08-03 | 哈尔滨理工大学 | A kind of Machine Vision Inspecting System |
| CN209746382U (en) * | 2019-03-11 | 2019-12-06 | 河南世贤纺织科技有限公司 | Energy-saving circuit of setting machine |
Non-Patent Citations (1)
| Title |
|---|
| 史晓明 ; 万峰 ; .基于TDC-GP2的超声波气体流量计的研制.仪表技术与传感器.(第11期),123-129. * |
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| CN111416588A (en) | 2020-07-14 |
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