CN2341036Y - Special temperature inspector for boiler - Google Patents
Special temperature inspector for boiler Download PDFInfo
- Publication number
- CN2341036Y CN2341036Y CN 98211221 CN98211221U CN2341036Y CN 2341036 Y CN2341036 Y CN 2341036Y CN 98211221 CN98211221 CN 98211221 CN 98211221 U CN98211221 U CN 98211221U CN 2341036 Y CN2341036 Y CN 2341036Y
- Authority
- CN
- China
- Prior art keywords
- circuit
- boiler
- utmost point
- special
- temperature
- Prior art date
- 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.)
- Expired - Fee Related
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- Emergency Alarm Devices (AREA)
Abstract
The utility model discloses a special temperature inspector for a boiler. In the utility model, a linear processing circuit is provided with a variable potentiometer which can carry out the linear processing to a signal; an alarm circuit is provided with a gate circuit composed of two three-alarming pipe, two resistances, and two capacitors, and the selective alarm can be realized. One special temperature inspector for a boiler can replace the two existing meters or an oil switch, the quality of an electric control cabinet of the boiler can be improved, and the production cost can be reduced; moreover, the display of a measuring channel is visual and convenient.
Description
The utility model belongs to temperature survey, control technology field, particularly is suitable for the measurement and control of temperature of boiler industry.
The linearization process of the thermometer of prior art is different and different according to temperature transducer, often adopts the resistor network form for use platinum resistance thermometer sensor, linearization process, and this form circuit connection, calculating are comparatively complicated, and can not long-distance transmissions.Another kind of platinum resistance thermometer sensor, linearize adopts negative-resistance-compensated form, and this form circuit only is applicable to that the very little oil-immersed switch of contact resistance makes multichannel and switch.General universal temperature polling instrument overtemperature alarm does not have selectivity, and promptly no matter that road overtemperature all will be reported to the police, general versatility temperature polling instrument is used in function surplus on the boiler, thereby it costs an arm and a leg, and the user can not accept.On the existing market boiler survey, temperature control instrument, adopts two instrument to add a table oil and night sweats to close and form, i.e. temperature instrumentation switches to reach with oil-immersed switch and patrols and examines purpose, makes overtemperture control usefulness with a temperature control instrument again.In use, oil-immersed switch often damages, and has a strong impact on boiler and normally moves, because the parts of usefulness are many, increased production cost, and the every road conversion of oily temperature switch only indicates " 1 ", " 2 ", " 3 " printed words, of long duration, specification is lost, survey be which road temperature just has been confused about.
The purpose of this utility model is, provides a kind of boiler special-purpose temperature polling instrument, and it can substitute two instrument commonly used and a table oil passs of night sweating, and its passage indication is clear and definite, intuitively.
For achieving the above object, solution of the present utility model is: the special-purpose temperature polling instrument of boiler by signal detection amplifying circuit, linear circuit, A/O converting digital display circuit, overtemperature alarm circuit and power circuit are formed is provided with a variable potentiometer P at linear circuit
4, one termination signal amplifier U
1:Output 14 pin of O, other end ground connection, 35 pin of variable termination A/O; In the overtemperature alarm circuit, be provided with by N
1, N
2, R
11, E
4, R
21, E
3The circuit of forming.N in this circuit
1The b utmost point meet R
11And E
4One end, N
2The b utmost point meet R
21And E
3An end, R
11Another termination amplifier U
2:O output 14 pin, R
21The other end connect the special-purpose indicator lamp L in road
2, E
3, E
4And N
2Plus earth, N
1The e utmost point meet N
2The c utmost point, N
1The c utmost point meet overtemperature alarm indicator lamp L
4An end.
Advantage of the present utility model: (one) is easy to use; (2) the passage indication is clear and definite; The temperature measurement accuracy height.(3) more existing logging cost is low, has saved perishable oil-immersed switch, has improved product quality.
Below in conjunction with accompanying drawing the special-purpose temperature polling instrument embodiment of boiler of the present utility model is further described
Fig. 1 is that the special-purpose temperature polling instrument of the utility model boiler detects electrical schematic diagram
Fig. 2 is that the special-purpose temperature polling instrument temperature of the utility model boiler shows electrical schematic diagram
Fig. 3 is the special-purpose temperature polling instrument profile of a utility model boiler panel schematic diagram
As shown in Figure 1, the import of boiler, outlet, flue three road temperature signals are by JK
1Send into electronics and simulate switch V
3, through V
3Deliver to U
1:A, U
1:B amplifier input is through amplifying the back by U
1:O delivers to linear process potentiometer P
4, P
4A termination signal amplifier U
1:Output 14 pin of O, other end ground connection, 35 pin of variable termination N/O.Its linearize principle is: the signal voltage of detection is by potentiometer P
4Dividing potential drop is delivered to the V of A/O
EEFNegative terminal utilizes N/O self operation relation, and signal linearization is handled.
By U
1:U is delivered on another road of temperature signal of O output
1:The C input is penetrated and is delivered to open loop amplifier U subsequently
2:The O positive input terminal, potentiometer P
1The setting voltage value that provides is delivered to U through emitter follower
2:The O negative input end is after relatively amplifying, if measuring-signal is higher than setting signal, U
2:O exports positive signal, N
1Conducting; N
2Base resistance R
21Be connected on " outlet temperature " passage, if patrol and examine " outlet temperature " passage, then N this moment
2Also conducting, current-collector J adhesive this moment, the overtemperature alarm lamp is bright, and the normally opened contact adhesive drives external electric bell and rings, external current-collector action, air-introduced machine stops, and boiler stops heating.This AND circuit has solved preferably to certain road warning function selectively.R
11, F
4, R
21, E
3Be anti-interference delay circuit, the optional 0.1-10 of delay time second.
By U
21A, U
21B produces constant-current source and simulates switch U through electronics
4Deliver to sensor, sensor Yin Wendu difference and resistance changes, thus can detect the voltage under the different temperatures situation, and be converted to corresponding temperature value.
V
5Be 14 binary string linage-counters, control V by it
3, V
4Synchronous open and close sensor signal.
V
6, V
7, O
1, O
2, O
3, O
4And F
1, F
2Form power circuit, its power supply is output as+12V ,+5V ,-5V.
By Fig. 2, Fig. 3 as can be known, L
5, L
6, L
7Be passage demonstration=warning (1), they be contained in respectively the panel inlet temperature (2) of Fig. 1, the temperature of going out (3), flue temperature (4), printed words above or below.L
3Be the overtemperature alarm lamp, be contained in panel overtemperature alarm (5) printed words above or below.
Claims (2)
1, a kind of special-purpose temperature polling instrument of being made up of signal detection amplifying circuit, linear circuit, A/O converting digital display circuit, overtemperature alarm circuit and power circuit of boiler is characterized in that linear circuit is provided with a variable potentiometer P
4, one termination signal amplifier U
1Output 14 pin of O, other end ground connection, 35 pin of variable termination A/O; In the overtemperature alarm circuit, be provided with by N
1, N
2, R
11, E
4, R
21, E
3The circuit of forming door.
2, by the special-purpose temperature polling instrument of the described a kind of boiler of claim 1, it is characterized in that: N in the overtemperature alarm gate circuit
1The b utmost point meet R
11And E
4One end, N
2The b utmost point meet R
21And E
3An end, R
11Another termination amplifier U
2:O output 14 pin, R
21The other end connect the special-purpose indicator lamp L in road
2, E
3, F
4And N
2E utmost point ground connection, N
1The e utmost point meet N
2The c utmost point, N
1The c utmost point meet overtemperature alarm indicator lamp L
4An end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98211221 CN2341036Y (en) | 1998-01-01 | 1998-01-01 | Special temperature inspector for boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98211221 CN2341036Y (en) | 1998-01-01 | 1998-01-01 | Special temperature inspector for boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2341036Y true CN2341036Y (en) | 1999-09-29 |
Family
ID=33965962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98211221 Expired - Fee Related CN2341036Y (en) | 1998-01-01 | 1998-01-01 | Special temperature inspector for boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2341036Y (en) |
-
1998
- 1998-01-01 CN CN 98211221 patent/CN2341036Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |