CN210244594U - Steam blanching machine air pressure early warning device - Google Patents
Steam blanching machine air pressure early warning device Download PDFInfo
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- CN210244594U CN210244594U CN201921382563.6U CN201921382563U CN210244594U CN 210244594 U CN210244594 U CN 210244594U CN 201921382563 U CN201921382563 U CN 201921382563U CN 210244594 U CN210244594 U CN 210244594U
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Abstract
The utility model discloses an air pressure early warning device of a steam blanching machine, which comprises a blanching furnace and a control cabinet, wherein an air pressure sensor is arranged in the blanching furnace, a controller and an air pressure monitoring component are arranged in the control cabinet, the air pressure monitoring component comprises a pressure signal amplifying circuit, a preset value comparison circuit and an alarm circuit, the output signal of the air pressure sensor is enhanced by the pressure signal amplifying circuit and is compared with the safety potential value in the preset value comparison circuit to form a double early warning signal of the controller and the alarm circuit, the utility model monitors the steam pressure in the blanching furnace in real time, realizes automatic alarm when the air pressure is too high, effectively prevents the air pressure from continuously rising, has good safety performance and high automation degree, and the pressure signal amplifying circuit effectively prevents the interference to the air pressure detection when the steam pressure in the blanching furnace is unstable due to feeding and discharging materials by utilizing the feedback compensation principle, the effectiveness of detection results and control is ensured, and the quality of automatic production is improved.
Description
Technical Field
The utility model relates to a chinese yam processing equipment technical field especially relates to a vapour floats quick-witted atmospheric pressure early warning device that scalds.
Background
With the rapid development of automatic production lines, the method also plays an important role gradually in the processing and manufacturing process of yam byproducts. For example, in the preparation process of yam slices, the yam slices need to be blanched and enzyme-deactivated, the blanching heating mode can be electric heating or steam heating, and the steam heating has the advantages of enzyme inhibition and color protection. Steam temperature and atmospheric pressure in the blanching furnace need be strictly controlled at the in-process that the steam blanched to guarantee the blanching effect, at present, the air input of the blanching machine is mainly adjusted through the manual work to the control of steam atmospheric pressure, thereby the purpose of setting for invariable atmospheric pressure is reached. However, in the actual production process, along with the continuous feeding and discharging, the steam pressure in the blanching furnace is often in an unstable state, and especially under the condition of discontinuous production, the steam accumulation in the blanching furnace easily occurs to cause overlarge pressure and even generate saturated steam, thereby seriously influencing the production and processing quality and even bringing potential safety hazard.
So the utility model provides a new scheme to solve the problem.
SUMMERY OF THE UTILITY MODEL
In view of the above situation, in order to overcome the defects of the prior art, the present invention provides an air pressure early warning device for a steam blanching machine.
The technical scheme for solving the problem is as follows: an air pressure early warning device of a steam blanching machine comprises a blanching furnace and a control cabinet, wherein an air pressure sensor is arranged in the blanching furnace, a controller and an air pressure monitoring assembly are arranged in the control cabinet, the air pressure monitoring assembly comprises a pressure signal amplifying circuit, a preset value comparing circuit and an alarm circuit, an output signal of the air pressure sensor is firstly sent into the pressure signal amplifying circuit to be enhanced, then an enhanced signal potential value is compared with a safe potential value in the preset value comparing circuit, and a comparison output signal of the air pressure sensor is sent into the controller on one hand and is used as a control signal to drive the alarm circuit to work on the other hand.
Further, the pressure signal amplifying circuit comprises an operational amplifier AR1, a non-inverting input terminal of the operational amplifier AR1 is connected with one end of the resistors R1, R3 and the capacitor C1, the other end of the resistor R1 is connected with a first signal output port of the air pressure sensor, the resistor R3, the other end of the capacitor C1 is grounded, the inverting input end of the operational amplifier AR1 is connected with one end of the resistor R2 and one end of the capacitor C2, the other end of the resistor R2 is connected with the second signal output port of the air pressure sensor, the other end of the capacitor C2 is grounded, the inverting input end of the operational amplifier AR1 is also connected with the output end of the operational amplifier AR1 through the parallel resistor R4 and the parallel capacitor C3, the output end of the operational amplifier AR1 is connected with the base of the triode VT1 and one end of the capacitor C4 through the resistor R5, the other end of the capacitor C4 is grounded, the collector of the triode VT1 is connected with a +5V power supply, and the emitter of the triode VT1 is connected with.
Further, the preset value comparison circuit comprises a comparator AR2, the in-phase input end of the comparator AR2 is connected with the pressure signal amplification circuit, one end of a capacitor C6 and one end of an inductor L1 sequentially through a voltage stabilizing diode DZ1 and a resistor R6, the other end of the capacitor C6 and the other end of the inductor L1 are grounded, the reverse phase input end of the comparator AR2 is connected with one end of a resistor R7, one end of the capacitor C7 and one end of an adjustable resistor RP1, the other end of the resistor R7 is connected with a +5V power supply, the other end of the capacitor C7 is grounded with the other end of the adjustable resistor RP1 and a sliding end, and the output end of the comparator AR2 is connected with the input ends.
Further, the alarm circuit comprises a triode VT2, the base electrode of the triode VT2 is connected with one end of a capacitor C3 and the output end of a comparator AR2 through a resistor R8, the other end of the capacitor C8 is grounded, the collector electrode of the triode VT2 is connected with a +12V power supply through a resistor R9, and the emitter electrode of the triode VT2 is grounded through a parallel alarm lamp LED1 and an alarm LS 1.
Furthermore, an electromagnetic valve is arranged on an air inlet pipeline of the blanching furnace, and the control end of the electromagnetic valve is connected with the controller.
Through the technical scheme, the beneficial effects of the utility model are that:
1. the utility model monitors the steam pressure in the blanching furnace in real time, realizes automatic alarm when the pressure is too high, effectively prevents the pressure from continuously rising, and has good safety performance and high automation degree;
2. the pressure signal amplifying circuit effectively prevents the interference to the air pressure detection when the steam air pressure in the blanching furnace is unstable due to feeding and discharging by utilizing the feedback compensation principle, ensures the validity of the detection result and control and improves the quality of automatic production;
3. when the steam pressure in the blanching furnace is higher than the safety range, a comparator principle is utilized to form double early warning signals for the controller and the warning circuit, and a good protection effect is achieved.
Drawings
Fig. 1 is a schematic circuit diagram of the pressure signal amplifying circuit of the present invention.
Fig. 2 is a schematic circuit diagram of the preset value comparison circuit of the present invention.
Fig. 3 is a circuit schematic diagram of the alarm circuit of the present invention.
Detailed Description
The foregoing and other technical matters, features and effects of the present invention will be apparent from the following detailed description of the embodiments, which is to be read in connection with the accompanying drawings 1 to 3. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.
Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.
The utility model provides a steam blanching machine atmospheric pressure early warning device, including blanching stove and switch board, blanching and be provided with pressure sensor P1 in the stove, set up controller and atmospheric pressure monitoring subassembly in the switch board, the atmospheric pressure monitoring subassembly includes pressure signal amplifier circuit, default comparison circuit and warning circuit, the output signal of pressure sensor P1 sends into pressure signal amplifier circuit at first and strengthens the processing, then with the signal potential value after strengthening and the safe potential value in the default comparison circuit carry out the comparison, its comparison output signal sends into the controller on the one hand, on the other hand drives warning circuit work as control signal. Wherein, the air inlet pipeline of the blanching furnace is provided with an electromagnetic valve, and the control end of the electromagnetic valve is connected with the controller.
As shown in fig. 1, the pressure signal amplifying circuit includes an operational amplifier AR1, two output signals of the pressure sensor P1 are respectively sent to two input ends of the operational amplifier AR1 after being filtered by RC, and the operational amplifier AR1 performs differential amplification on the two received input signals, so as to achieve good common mode rejection capability on the input signals, reduce temperature noise interference, and improve signal amplification effect. Meanwhile, the resistance-capacitance feedback is connected while the transport device AR1 amplifies, the signal is fed back and compensated when the steam pressure in the blanching furnace is often in an unstable state, signal fluctuation is reduced, the stability of signal output is ensured, and the triode VT1 is connected to the output end of the transport device AR1 to form an emitter follower, so that the signal amplification efficiency is greatly improved. The non-inverting input end of the operational amplifier AR1 is connected to one end of the resistors R1, R3 and the capacitor C1, the other end of the resistor R1 is connected to the first signal output port of the air pressure sensor P1, the other ends of the resistor R3 and the capacitor C1 are grounded, the inverting input end of the operational amplifier AR1 is connected to one ends of the resistor R2 and the capacitor C2, the other end of the resistor R2 is connected to the second signal output port of the air pressure sensor P1, the other end of the capacitor C2 is grounded, the inverting input end of the operational amplifier AR1 is further connected to the output end of the operational amplifier AR1 through the parallel resistor R4 and the capacitor C3, the output end of the operational amplifier AR1 is connected to the base of the transistor VT1 and one end of the capacitor C4 through the resistor R5, the other end of the capacitor C4 is grounded, the collector of the transistor VT 4 is connected to the +5V power supply.
As shown in fig. 2, the signals amplified by the pressure signal amplifying circuit are sent to a preset value comparing circuit for comparison. In order to ensure the accuracy of the comparison result, the output signal of the triode VT1 is firstly subjected to LC filtering to ensure the accuracy of the comparison signal, then the comparison signal is stabilized by the voltage stabilizing diode DZ1, and finally the comparison signal is sent to the comparator AR2 for comparison. The non-inverting input end of the comparator AR2 is connected with the pressure signal amplifying circuit and one end of the capacitor C6 and one end of the inductor L1 sequentially through the voltage-stabilizing diode DZ1 and the resistor R6, the other ends of the capacitor C6 and the inductor L1 are grounded, the inverting input end of the comparator AR2 is connected with one end of the resistor R7, one end of the capacitor C7 and one end of the adjustable resistor RP1, the other end of the resistor R7 is connected with the +5V power supply, the other end of the capacitor C7 is grounded with the other end and the sliding end of the adjustable resistor RP1, and the output end of the comparator AR2 is connected with the input ends of the controller. The resistor R7 and the adjustable resistor RP1 divide the voltage of the +5V power supply by using a voltage division principle, so that a preset safety potential value is obtained at the inverting input end of the comparator AR2, the resistance value of the adjustable resistor RP1 is adjusted to change the size of the safety potential value, the steam safety air pressure range is conveniently set in actual production, and the capacitor C7 stabilizes the safety potential value.
As shown in fig. 3, the alarm circuit includes a transistor VT2, a base of the transistor VT2 is connected to one end of a capacitor C3 and an output end of a comparator AR2 through a resistor R8, the other end of the capacitor C8 is grounded, a collector of the transistor VT2 is connected to a +12V power supply through a resistor R9, and an emitter of the transistor VT2 is grounded through a parallel alarm lamp LED1 and an alarm LS 1.
The utility model discloses a concrete work flow does: when the pressure sensor detects that the steam pressure in the blanching furnace is in a safe range, the signal potential value output to the inverting input end of the comparator AR2 after being processed by the pressure signal amplifying circuit is lower than a preset safe potential value, so that the comparator AR2 outputs a low-level signal, and the controller and the alarm circuit do not act accordingly.
On the contrary, when the pressure sensor detects that the steam pressure in the blanching furnace is higher than the safety range, the signal potential value of the reverse phase input end of the comparator AR2 is higher than the preset safety potential value, the comparator AR2 outputs a high level signal, the base electrode of the triode VT2 in the alarm circuit is driven by the high level signal to be electrically conducted, so that the alarm lamp LED1 and the alarm LS1 loop are conducted to send out an acousto-optic alarm signal, and production and maintenance personnel are informed to overhaul in time. Meanwhile, when the controller receives the high level signal, the electromagnetic valve is immediately controlled to be closed, the air inlet pressure of the blanching furnace is prevented from continuously rising, and a good protection effect is achieved.
To sum up, the utility model discloses steam pressure to rinsing in the scalding furnace carries out real-time supervision, realizes automatic alarm when atmospheric pressure is too high to prevent effectively that atmospheric pressure from continuing to rise, the security performance is good, and degree of automation is high. The air pressure detection precision is high, the interference to the air pressure detection when the steam pressure in the blanching furnace is unstable due to feeding and discharging is effectively prevented by utilizing the feedback compensation principle, the detection result and the control effectiveness are ensured, and the automatic production quality is improved.
The above description is provided for further details of the present invention with reference to the specific embodiments, which should not be construed as limiting the present invention; to the utility model discloses affiliated and relevant technical field's technical personnel are based on the utility model discloses under the technical scheme thinking prerequisite, the extension of doing and the replacement of operating method, data all should fall within the utility model discloses within the protection scope.
Claims (5)
1. The utility model provides a steam blanching machine atmospheric pressure early warning device, includes blanching furnace and switch board, its characterized in that: the blanching furnace is internally provided with an air pressure sensor, a controller and an air pressure monitoring assembly are arranged in the control cabinet, the air pressure monitoring assembly comprises a pressure signal amplifying circuit, a preset value comparing circuit and an alarm circuit, an output signal of the air pressure sensor is firstly sent into the pressure signal amplifying circuit for enhancement processing, then an enhanced signal potential value is compared with a safety potential value in the preset value comparing circuit, and a comparison output signal is sent into the controller on one hand and is used as a control signal to drive the alarm circuit to work on the other hand.
2. The steam blanching machine air pressure early warning device of claim 1, wherein: the pressure signal amplifying circuit comprises an operational amplifier AR1, wherein the non-inverting input end of the operational amplifier AR1 is connected with one end of a resistor R1, a resistor R3 and a capacitor C1, the other end of the resistor R1 is connected with a first signal output port of an air pressure sensor, the other ends of a resistor R3 and a capacitor C1 are grounded, the inverting input end of the operational amplifier AR1 is connected with one end of a resistor R2 and one end of a capacitor C2, the other end of a resistor R2 is connected with a second signal output port of the air pressure sensor, the other end of a capacitor C2 is grounded, the inverting input end of the operational amplifier AR1 is further connected with the output end of the operational amplifier AR1 through a resistor R4 and a capacitor C3 which are connected in parallel, the output end of the operational amplifier AR2 is connected with the base of a triode VT1 and one end of a capacitor C4 through a resistor R5, the other end of the capacitor C4 is grounded, the collector of a triode.
3. The steam blanching machine air pressure early warning device of claim 2, wherein: the preset value comparison circuit comprises a comparator AR2, the in-phase input end of the comparator AR2 is connected with one end of a capacitor C6 and one end of an inductor L1 through a voltage stabilizing diode DZ1 and a resistor R6 in sequence, the other end of the capacitor C6 and the other end of the inductor L1 are grounded, the reverse phase input end of the comparator AR2 is connected with one end of a resistor R7 and one end of a capacitor C7 and one end of an adjustable resistor RP1, the other end of the resistor R7 is connected with a +5V power supply, the other end of the capacitor C7 is grounded with the other end and a sliding end of the adjustable resistor RP1, and the output end of the comparator AR2 is connected with the input ends of a controller.
4. The steam blanching machine air pressure early warning device of claim 3, wherein: the alarm circuit comprises a triode VT2, the base electrode of the triode VT2 is connected with one end of a capacitor C3 and the output end of a comparator AR2 through a resistor R8, the other end of the capacitor C8 is grounded, the collector electrode of the triode VT2 is connected with a +12V power supply through a resistor R9, and the emitter electrode of the triode VT2 is grounded through a warning lamp LED1 and a warning device LS1 which are connected in parallel.
5. The steam blanching machine air pressure early warning device of claim 3, wherein: an electromagnetic valve is arranged on an air inlet pipeline of the blanching furnace, and the control end of the electromagnetic valve is connected with the controller.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921382563.6U CN210244594U (en) | 2019-08-24 | 2019-08-24 | Steam blanching machine air pressure early warning device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921382563.6U CN210244594U (en) | 2019-08-24 | 2019-08-24 | Steam blanching machine air pressure early warning device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114566943A (en) * | 2022-02-23 | 2022-05-31 | 睿士医疗科技(浙江)有限公司 | Overvoltage protection system of hardware |
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2019
- 2019-08-24 CN CN201921382563.6U patent/CN210244594U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114566943A (en) * | 2022-02-23 | 2022-05-31 | 睿士医疗科技(浙江)有限公司 | Overvoltage protection system of hardware |
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