CN205209592U - Water level detection circuit of saturated steam generator - Google Patents
Water level detection circuit of saturated steam generator Download PDFInfo
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- CN205209592U CN205209592U CN201520714918.2U CN201520714918U CN205209592U CN 205209592 U CN205209592 U CN 205209592U CN 201520714918 U CN201520714918 U CN 201520714918U CN 205209592 U CN205209592 U CN 205209592U
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Abstract
The utility model provides a water level detection circuit of saturated steam generator, includes transformer (T1), high water level probe (P1), low water level probe (P2), first electric capacity (C1), second electric capacity (C2), an optoelectronic coupler (U1), the 2nd optoelectronic coupler (U2), first resistance (R1), second resistance (R2), third resistance (R3), fourth resistance (R4), microprocessor (U3). The utility model discloses an exchange and survey the water level signal, avoided the probe easily to receive the corruption, adopt the opto -coupler to keep apart simultaneously, improved water level detection circuit's reliability and interference killing feature.
Description
Technical field
The utility model relates to a kind of water level detection circuit, especially a kind of water level detection circuit of saturated steam generator.
Background technology
Owing to saving water resource, saturated steam generator is widely used in cleaning industry, and the detection of saturated steam generator middle water level is the very important link of moisturizing control, very high to reliability requirement, the easy loss of existing saturated steam generator water level detection circuit ubiquity, the problem such as sensitivity is low, poor reliability, detection probe electrolytic corrosion are serious.
Summary of the invention
The purpose of this utility model is to provide a kind of water level detection circuit, especially a kind of water level detection circuit of saturated steam generator, can realize the water level detecting function of saturated steam generator.
The technical solution of the utility model is:
A water level detection circuit for saturated steam generator, comprises transformer, high-level probe, low-level probe, the first electric capacity, the second electric capacity, the first photoelectrical coupler, the second photoelectrical coupler, first resistance, the second resistance, the 3rd resistance, the 4th resistance, microprocessor; The input end of transformer connects interchange AC220V civil power, and one end of the output of transformer connects the second resistance and the 4th resistance respectively, and other one end of the output of transformer connects the shell of saturated steam generator boiler, is connected to electric power system protective grounding simultaneously; Second resistance is connected with an input end of the first photoelectrical coupler, and another input end of the first photoelectrical coupler is connected with high-level probe; 4th resistance is connected with an input end of the second photoelectrical coupler, and another input end of the second photoelectrical coupler is connected with low-level probe; The output terminal transistor collector of the first photoelectrical coupler is connected with one end of the first resistance, be connected to the positive pole of the first electric capacity and the numeral input I/O port of microprocessor simultaneously, other one end of first resistance is connected with the power supply vdd terminal of microprocessor, and the negative pole of the first electric capacity is connected to the earth terminal of microprocessor; The output terminal transistor collector of the second photoelectrical coupler is connected with one end of the 3rd resistance, be connected to the positive pole of the second electric capacity and the numeral input I/O port of microprocessor simultaneously, other one end of 3rd resistance is connected with the power supply vdd terminal of microprocessor, and the negative pole of the second electric capacity is connected to the earth terminal of microprocessor.
Described first photoelectrical coupler and the second photoelectrical coupler all adopt two directions' inputing type electric coupler opto-coupler chip.
Described first photoelectrical coupler and the second photoelectrical coupler are TLP626 type electric coupler opto-coupler chip.
The beneficial effects of the utility model are:
The utility model adopts alternating current probe water level signal, avoids probe corrosion-vulnerable, adopts electric coupler optocoupler to isolate simultaneously, improves reliability and the antijamming capability of water level detection circuit.
Accompanying drawing explanation
Fig. 1 is the utility model circuit theory diagrams.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described:
As Fig. 1, a kind of water level detection circuit of saturated steam generator, comprise transformer (T1), high-level probe P1, low-level probe P2, the first electric capacity C1, the second electric capacity C2, the first photoelectrical coupler U1, the second photoelectrical coupler U2, first resistance R1, the second resistance R2, the 3rd resistance R3, the 4th resistance R4, microprocessor U3; The input end of transformer T1 connects interchange AC220V civil power, one end of the output of transformer T1 connects the second resistance R2 and the 4th resistance R4 respectively, other one end of the output of transformer T1 connects the shell of saturated steam generator boiler U4, is connected to electric power system protective grounding simultaneously; Second resistance R2 is connected with an input end of the first photoelectrical coupler U1, and another input end of the first photoelectrical coupler U1 is connected with high-level probe P1; 4th resistance R4 is connected with an input end of the second photoelectrical coupler U2, and another input end of the second photoelectrical coupler U2 is connected with low-level probe P2; The output terminal transistor collector of the first photoelectrical coupler U1 is connected with one end of the first resistance R1, be connected to the positive pole of the first electric capacity C1 and the numeral input I/O port of microprocessor U3 simultaneously, other one end of first resistance R1 is connected with the power supply vdd terminal of microprocessor U3, and the negative pole of the first electric capacity C1 is connected to the earth terminal of microprocessor U3; The output terminal transistor collector of the second photoelectrical coupler U2 is connected with one end of the 3rd resistance R3, be connected to the positive pole of the second electric capacity C2 and the numeral input I/O port of microprocessor U3 simultaneously, other one end of 3rd resistance R3 is connected with the power supply vdd terminal of microprocessor U3, and the negative pole of the second electric capacity C2 is connected to the earth terminal of microprocessor.
Described first photoelectrical coupler U1 and the second photoelectrical coupler U2 all adopts two directions' inputing type electric coupler opto-coupler chip.
Described first photoelectrical coupler U1 and the second photoelectrical coupler U2 is TLP626 type electric coupler opto-coupler chip.
In concrete enforcement, transformer T1 input connects the input of 220V mains, exporting effective value is the alternating voltage of 12V, 4th resistance R4 and the second resistance R2 generally selects resistance to be 12K Ω, photoelectrical coupler U1 can select chip TLP620 or TLP626, photoelectrical coupler U2 can select chip TLP620 or TLP626, voltage VDD voltage-to-ground is DC5V, first resistance R1 and the 3rd resistance R3 resistance are typically chosen in 10K Ω, first electric capacity C1 and the second electric capacity C2 selects the alminium electrolytic condenser of 10uF, the single-chip microcomputer etc. of the optional DC5V voltage of microprocessor U3.
Embodiment recited above is only be described preferred implementation of the present utility model; not design of the present utility model and scope are limited; do not departing under the utility model design concept prerequisite; the various modification that in this area, common engineering technical personnel make the technical solution of the utility model and improvement; all should fall into protection domain of the present utility model, the technology contents of the utility model request protection is all recorded in detail in the claims.
Claims (3)
1. the water level detection circuit of a saturated steam generator, it is characterized in that: comprise transformer (T1), high-level probe (P1), low-level probe (P2), first electric capacity (C1), the second electric capacity (C2), first photoelectrical coupler (U1), the second photoelectrical coupler (U2), first resistance (R1), the second resistance (R2), the 3rd resistance (R3), the 4th resistance (R4), microprocessor (U3); The input end of transformer (T1) connects interchange AC220V civil power, one end of the output of transformer (T1) connects the second resistance (R2) and the 4th resistance (R4) respectively, other one end of the output of transformer (T1) connects the shell of saturated steam generator boiler (U4), is connected to electric power system protective grounding simultaneously; Second resistance (R2) is connected with an input end of the first photoelectrical coupler (U1), and another input end of the first photoelectrical coupler (U1) is connected with high-level probe (P1); 4th resistance (R4) is connected with an input end of the second photoelectrical coupler (U2), and another input end of the second photoelectrical coupler (U2) is connected with low-level probe (P2); The output terminal transistor collector of the first photoelectrical coupler (U1) is connected with one end of the first resistance (R1), be connected to the positive pole of the first electric capacity (C1) and the numeral input I/O port of microprocessor (U3) simultaneously, other one end of first resistance (R1) is connected with the power supply vdd terminal of microprocessor (U3), and the negative pole of the first electric capacity (C1) is connected to the earth terminal of microprocessor (U3); The output terminal transistor collector of the second photoelectrical coupler (U2) is connected with one end of the 3rd resistance (R3), be connected to the positive pole of the second electric capacity (C2) and the numeral input I/O port of microprocessor (U3) simultaneously, other one end of 3rd resistance (R3) is connected with the power supply vdd terminal of microprocessor (U3), and the negative pole of the second electric capacity (C2) is connected to the earth terminal of microprocessor.
2. the water level detection circuit of a kind of saturated steam generator according to claim 1, is characterized in that: described first photoelectrical coupler (U1) and the second photoelectrical coupler (U2) all adopt two directions' inputing type electric coupler opto-coupler chip.
3. the water level detection circuit of a kind of saturated steam generator according to claim 1, is characterized in that: described first photoelectrical coupler (U1) and the second photoelectrical coupler (U2) are TLP626 type electric coupler opto-coupler chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520714918.2U CN205209592U (en) | 2015-09-16 | 2015-09-16 | Water level detection circuit of saturated steam generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520714918.2U CN205209592U (en) | 2015-09-16 | 2015-09-16 | Water level detection circuit of saturated steam generator |
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| Publication Number | Publication Date |
|---|---|
| CN205209592U true CN205209592U (en) | 2016-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520714918.2U Active CN205209592U (en) | 2015-09-16 | 2015-09-16 | Water level detection circuit of saturated steam generator |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105203180A (en) * | 2015-09-16 | 2015-12-30 | 湖南中航精工有限公司 | Water level detection circuit of saturated steam generator |
| CN109238397A (en) * | 2017-07-10 | 2019-01-18 | 广州康昕瑞基因健康科技有限公司 | liquid detecting circuit |
-
2015
- 2015-09-16 CN CN201520714918.2U patent/CN205209592U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105203180A (en) * | 2015-09-16 | 2015-12-30 | 湖南中航精工有限公司 | Water level detection circuit of saturated steam generator |
| CN109238397A (en) * | 2017-07-10 | 2019-01-18 | 广州康昕瑞基因健康科技有限公司 | liquid detecting circuit |
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