CN85204339U - Coal input quantity measuring device with micro-computer for chain boiler - Google Patents
Coal input quantity measuring device with micro-computer for chain boiler Download PDFInfo
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- CN85204339U CN85204339U CN 85204339 CN85204339U CN85204339U CN 85204339 U CN85204339 U CN 85204339U CN 85204339 CN85204339 CN 85204339 CN 85204339 U CN85204339 U CN 85204339U CN 85204339 U CN85204339 U CN 85204339U
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- coal
- input quantity
- coal input
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Abstract
A coal input quantity measuring device with micro-computer for chain boiler belongs to a device for measuring the weight of continuously moving solid materials. The utility model comprises a metering disc, a contactless electronic switch, an MCS-48 series chip microprocessor and peripheral hardware circuits thereof, which can detect and display the instantaneous coal input quantity and cumulative coal input quantity as well as the coal consumption in last working period and present working period; the instantaneous coal input quantity is made into 8 bit digit electrical signal output which provides an important parameter for realizing the control to the system of coal burning industrial boilers.
Description
The utility model belongs to a kind of device of measuring the solid material weight that moves continuously.
When the chain-type industrial boiler operation, need instantaneous coal input quantity, the accumulative total coal input quantity of boiler be carried out continuous automatic inspection, and testing result is shown; Need be converted to electric signal output to instantaneous coal input quantity, provide an important parameter for computing machine carries out system's control to coal-burning boiler.At present; have a kind of mechanical type coal table can the accumulative total coal input quantity of chain coal burning boiler to be detected (seeing MB81-3 moulded coal consumption gauging table operation instructions (Shanghai lathe Electroplate Factory)), but it can not detect and be converted to electric signal output to instantaneous coal input quantity.
Task of the present utility model is, in order to solve that above-mentioned coal input quantity detects and conversion of signals problem and designed a kind ofly with the coal quantity sensor, is the coal table of core with the chip microprocessor.
Basic design of the present utility model is, in boiler traveling-grate stoker main drive shaft end one metering disk is installed, and the edge of dish evenly is embedded with several lamellules, and this dish rotates with main drive shaft.Be equipped with a contactless electronic beam switch very nearby from the metering disk edge.When a certain lamellule of metering disk edge was aimed at this switch, switch promptly sent a negative pulse and delivers to interface microcontroller.
Be equipped with a sprocket wheel on the boiler traveling-grate stoker main drive shaft, fire grate is done translation motion under the drive of sprocket wheel, evenly is loaded with the coal seam of certain thickness and width on the fire grate.So, at the coal input quantity of a negative pulse in the time interval be:
Δ coal input quantity=Δ coal body amasss coal proportion
=(π d)/(n) bh coal proportion
Wherein:
D: traveling-grate stoker sprocket wheel external diameter unit is a rice
N: lamellule number on the metering disk
B: coal seam developed width unit is a rice on the traveling-grate stoker
H: coal seam actual (real) thickness unit is a rice on the traveling-grate stoker
Coal proportion: the proportion unit of coal is a kilogram/rice
3
Above-mentioned parameter is imported single-chip microcomputer as variable constant by keyboard.
Whenever contactless electronic beam switch when single-chip microcomputer has sent several negative pulses, single-chip microcomputer calculates coal input quantity during these several negative pulses according to above-mentioned coal input quantity computing formula, calculates this section time interval.Coal input quantity promptly obtains instantaneous coal input quantity divided by the time interval, and coal input quantity is constantly added up promptly obtains the accumulative total coal input quantity.Above-mentioned parameter can send digital indicator to show according to keyboard commands.Instantaneous coal input quantity also outputs to 8 latchs by interface microcontroller, has solved the problem that instantaneous coal input quantity transfers digital electric signal to.
By the produced microcomputer coal of above-mentioned design concept table, in use, stoker workman can grasp the instantaneous coal input quantity of boiler at any time, observes the reasonable numerical value that sums up coal input quantity under certain intake and air inducing amount situation, make the more complete of coal combustion, thereby improve the thermal efficiency of boiler; The accumulative total of boiler coal input quantity shows can make the boiler user that coal-fired consumption of per tour accomplished to know what's what, and examines per tour stoker personnel's work quality and formulates rational business administration quota by the contrast of different order of classes or grades at school, reaches purpose of energy saving; Instantaneous coal input quantity is converted to digital electric signal, provides an important parameter for computing machine carries out system's control to coal-burning boiler.
Be a most preferred embodiment of the present utility model below.
Fig. 1 is that chain-grate boiler coal amount signal produces schematic diagram.
Fig. 2 is the utility model hardware circuit principle figure.
Fig. 3 is the utility model program general diagram.
Among Fig. 1, a metering disk (1) can be that any hard insulation is made, and its edge evenly is embedded with 72 lamellules (4), and metering disk (1) screw (2) that is fixed is fixed on the end of main drive shaft (3).A contactless electronic beam switch (8) is installed in from very near place, metering disk (1) edge, and its spacing is 3 ± 1mm.When a certain lamellule (4) was aimed at contactless electronic beam switch (8) with metering disk (1) rotation, this switch was promptly to the signal input interface T of MCS-48 single-chip microcomputer 8039 (7)
0Send a negative pulse.
As previously mentioned, calculating the coal input quantity formula of a negative pulse in the time interval is:
Δ coal input quantity=Δ coal body amasss coal proportion
=(π d)/(n) bh coal proportion
In this example, d=0.55, b=2.05, h=0.100, n=72, coal proportion=900 kilogram/meter
3These constants are sent into the internal memory of single-chip microcomputer (7) by keyboard (6).
Whenever contactless electronic beam switch (8) to T
0When having sent 5 negative pulses, the coal meter calculation program in the single-chip microcomputer (7) is calculated the coal input quantity during these 5 negative pulses.One clock program is arranged in the single-chip microcomputer (7), and its error is 24 hours ± 10 seconds, sends this 5 times that negative pulse is used according to this clock calculation.Coal input quantity promptly obtains instantaneous coal input quantity divided by the time, and coal input quantity is constantly added up promptly obtains the accumulative total coal input quantity.Instantaneous coal input quantity is by the P of single-chip microcomputer (7)
1Interface outputs to 8 latchs 273 (5).Also have program to calculate in the single-chip microcomputer (7) to last one class of coal consumption and this class coal consumption.
Above-mentioned each parameter can send digital indicator (9) to show according to keyboard commands.
Claims (4)
1, be used to measure the microcomputer coal table of chain-type coal-burned industrial boiler coal input quantity, belong to a kind of device of measuring the solid material weight that moves continuously, it comprises a metering disk [1], a contactless electronic beam switch [8], a microprocessor [7] and peripheral hardware circuit thereof, it is characterized in that said metering disk [1] makes for hard insulation, its edge is embedded with several lamellules [4], said metering disk [1] is 3 ± 1mm with the spacing of contactless electronic beam switch [8], whenever a certain lamellule [4] is aimed at contactless electronic beam switch [8], make contactless electronic beam switch [8] produce a negative pulse, said microprocessor is a MCS-48 series chip microprocessor.
2,, it is characterized in that the interface P of instantaneous coal input quantity by single-chip microcomputer (7) as the said microcomputer coal of claim 1 table
1Output to 8 latchs 273 (5).
3,, it is characterized in that metering disk (1) is fixed on the end of boiler traveling-grate stoker main drive shaft (3) as the said microcomputer coal of claim 1 table.
4,, it is characterized in that the negative pulse output terminal of contactless electronic beam switch (8) and the T of single-chip microcomputer (7) as the said microcomputer coal of claim 1 table
0Input end is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85204339 CN85204339U (en) | 1985-10-12 | 1985-10-12 | Coal input quantity measuring device with micro-computer for chain boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85204339 CN85204339U (en) | 1985-10-12 | 1985-10-12 | Coal input quantity measuring device with micro-computer for chain boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN85204339U true CN85204339U (en) | 1986-09-10 |
Family
ID=4799674
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 85204339 Ceased CN85204339U (en) | 1985-10-12 | 1985-10-12 | Coal input quantity measuring device with micro-computer for chain boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN85204339U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100348955C (en) * | 2003-02-25 | 2007-11-14 | 菲斯特有限责任公司 | Device for effecting continuous gravimetric dosing |
-
1985
- 1985-10-12 CN CN 85204339 patent/CN85204339U/en not_active Ceased
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100348955C (en) * | 2003-02-25 | 2007-11-14 | 菲斯特有限责任公司 | Device for effecting continuous gravimetric dosing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CE01 | Termination of patent right |