CN200964297Y - Spacing variable screw shaft - Google Patents
Spacing variable screw shaft Download PDFInfo
- Publication number
- CN200964297Y CN200964297Y CN 200620009278 CN200620009278U CN200964297Y CN 200964297 Y CN200964297 Y CN 200964297Y CN 200620009278 CN200620009278 CN 200620009278 CN 200620009278 U CN200620009278 U CN 200620009278U CN 200964297 Y CN200964297 Y CN 200964297Y
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- Prior art keywords
- coal
- pitch
- inlet
- screw
- conveyer
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- Expired - Fee Related
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Abstract
The utility model discloses a pitch-variable auger shaft which relates to the technical field of screw coal feeder used at a fluidized-bed combustion boiler. The utility model comprises a known shaft and a plurality of screw blades connected with the shaft. The pitch between two neighboring screw blades in turn increases at the extension from a coal inlet to a coal outlet. The end of a first screw blade aligns with a front wall plate of coal inlet. The next pitch is larger than the previous pitch. When the coal enters the next pitch from the previous pitch via an auger shaft, the coal faces a large space which means that the coal can lower the density, become incompact and prevent the coal from being compact and adhesive and sticking to the screw blade of auger shaft. Even the coal has high water content or has a fine particle size, the coal feeder can still keep fluent and present no jam, which can assure a safe and economic boiler operation and lower a friction resistance and a power consumption of motor. The utility model is characterized in simple structure, easy embodiment, convenient operation, lower cost and easy popularization.
Description
Technical field
The utility model belongs to fluidized-bed combustion boiler screw-type coal distributor technical field, relates in particular to a kind of screw-conveyer-shaft of fluidized-bed combustion boiler screw-type coal distributor.
Background technology
Fluidized-bed combustion boiler feeder screw-conveyer-shaft operated by rotary motion is below coal inlet, be the feeder entrance, coal is piled up the space of filling up between the blade by nature, when screw-conveyer-shaft rotates, the thrust that coal is subjected to helicallobe travels forward, the principle of Here it is screw-conveyer-shaft convey materials.The structural shape of pitches such as existing fluidized-bed combustion boiler feeder screw-conveyer-shaft all is, helicallobe manufactures a slice by a pitch, for etc. the pitch screw-conveyer-shaft, what pitches are arranged, how many identical helicallobes are just arranged, it is welded on the axle makes.After coal leaves coal breakage bucket zone, coal enters next helicallobe spacing by previous helicallobe spacing, since etc. each helicallobe spacing of pitch screw-conveyer-shaft equate, be that each helicallobe spacing volume equates, so coal is entered by previous helicallobe spacing after the next helicallobe spacing, mass conservation, constancy of volume, degree of firmness are constant, and this is under the situation of hypothesis auger feeder without any frictional resistance certainly.But in fact, the auger feeder has frictional resistance, and coal is extruded under the effect of thrust and resistance, and degree of firmness are increasing.Coal-supplying amount is big more, and resistance is big more, and coal is closely knit more, when boiler uses that the coal aqueous ingredients is moderate, when the granularity of coal is suitable, the screw-type coal distributor of this structural shape still can satisfy the needs of fluidized-bed combustion boiler coal supply.But when boiler uses coal water content granularity big or coal when thin, after the compacted compacting of coal, be bonded to piece, bond between the screw-conveyer-shaft blade, feeder is stopped up, boiler is forced to out of service.When coal-supplying amount is big, when resistance increases, also might cause the motor power (output) deficiency and stall.Simultaneously, feeder stops up very difficulty of back cleaning, and consumed time is also very long, influences the economic security operation of boiler.
Summary of the invention
Thereby the purpose of this utility model is to provide a kind of feeder to be difficult for stopping up the variable pitch screw-conveyer-shaft that can guarantee the operation of boiler economic security.
The technical scheme that the utility model is adopted for achieving the above object is:
A kind of variable pitch screw-conveyer-shaft comprises axle and a plurality of helicallobes that are connected on the axle, and its special character is that the pitch between per two adjacent helicallobes is all unequal.
In order to reduce the power consumption of frictional resistance and electrical motor, variable pitch screw-conveyer-shaft of the present utility model, pitch self-coal-inlet to the coal outlet direction between per two adjacent helicallobes increases progressively successively.
Pitch self-coal-inlet to coal outlet direction equal difference successively between per two adjacent helicallobes increases progressively.
Pitch self-coal-inlet between per two adjacent helicallobes to the coal outlet direction also successively geometric ratio increase progressively.
Variable pitch screw-conveyer-shaft of the present utility model, self-coal-inlet are to the coal outlet direction, and first pitch is greater than 0.6 times of helicallobe diameter projected, and last pitch is less than 1.2 times of helicallobe diameter projected; Self-coal-inlet is to the coal outlet direction, and the pitch between per two adjacent helicallobes equal difference successively increases progressively, incremental change for last pitch deduct first pitch then divided by the resultant pitch number deduct 1 poor.
As the further optimization of technique scheme, variable pitch screw-conveyer-shaft of the present utility model, self-coal-inlet are to the coal outlet direction, and first pitch equals 0.8 times of helicallobe diameter projected, and last pitch equals 1.0 times of helicallobe diameter projected; Self-coal-inlet is to the coal outlet direction, and the pitch between per two adjacent helicallobes equal difference successively increases progressively, incremental change for last pitch deduct first pitch then divided by the resultant pitch number deduct 1 poor.
Self-coal-inlet is to the coal outlet direction, and the end of first helicallobe aligns with the coal inlet front panel.Can not make the coal inlet place produce the not dead angle of easy to clean like this.
Variable pitch screw-conveyer-shaft of the present utility model, its structural shape is that pitch self-coal-inlet to the coal outlet direction between per two adjacent helicallobes increases progressively successively step by step, the pitch in back is greater than previous pitch, when coal enters next pitch by screw-conveyer-shaft by previous pitch, spatial volume increases, degree of firmness reduce, it is loose that coal becomes, thereby can prevent that coal is compacted bonding, can not be squeezed on the screw-conveyer-shaft helicallobe, even boiler uses coal water content granularity big or coal when thin, it is unimpeded that feeder still can keep, do not produce obstruction, guarantee the economic security operation of boiler, and can reduce the power consumption of frictional resistance and electrical motor, and this is simple in structure, be easy to realize, easy to operate, cost is also lower, is convenient to promote the use of.
Description of drawings
Accompanying drawing is the scheme drawing of the utility model variable pitch screw-conveyer-shaft.
Among the figure: 1-coal inlet, 2-axle, 3-helicallobe, 4-coal outlet.
The specific embodiment
Accompanying drawing is depicted as first kind of specific embodiment of the utility model variable pitch screw-conveyer-shaft, it comprises known axle 2 and a plurality of helicallobes 3 that are connected on the axle 2, the length of the variable pitch screw-conveyer-shaft of fluidized-bed combustion boiler feeder is 3.51 meters, helicallobe 3 diameter projecteds are 300 millimeters, pitch between first of coal breakage bucket below and second helicallobe 3 is 240 millimeters, self-coal-inlet 1 is to coal outlet 4 directions, second pitch got 245 millimeters, the 3rd pitch got 250 millimeters, the rest may be inferred, each pitch all increases progressively 5 millimeters than previous pitch, totally 13 pitches, and the end of first helicallobe 3 aligns with coal inlet 1 front panel.Helicallobe 3 manufactures a slice by a pitch, for the variable pitch screw-conveyer-shaft, what pitches is arranged, and a plurality of single different helicallobes 3 will be arranged, and different helicallobe 3 is welded on the axle 2 in order get final product.
Second kind of specific embodiment as the utility model variable pitch screw-conveyer-shaft, the length of the variable pitch screw-conveyer-shaft of fluidized-bed combustion boiler feeder is 2.16 meters, projecting blade 3 diameters are 300 millimeters, pitch between first of coal breakage bucket below and second helicallobe 3 is 240 millimeters, self-coal-inlet 1 is to coal outlet 4 directions, second pitch got 248.57 millimeters, the 3rd pitch got 257.14 millimeters, the rest may be inferred, each pitch all increases progressively 8.57 millimeters than previous pitch, totally 8 pitches, all the other structures are with first kind of specific embodiment.
Variable pitch screw-conveyer-shaft of the present utility model is not limited to the above-mentioned specific embodiment, and the unequal structure of pitch between every per two adjacent helicallobes all falls within the protection domain of the present utility model.
Claims (7)
1, a kind of variable pitch screw-conveyer-shaft comprises axle and a plurality of helicallobes that are connected on the axle, and it is characterized in that: the pitch between per two adjacent helicallobes is all unequal.
2, variable pitch screw-conveyer-shaft according to claim 1 is characterized in that: pitch self-coal-inlet to the coal outlet direction between per two adjacent helicallobes increases progressively successively.
3, variable pitch screw-conveyer-shaft according to claim 2 is characterized in that: pitch self-coal-inlet to coal outlet direction equal difference successively between per two adjacent helicallobes increases progressively.
4, variable pitch screw-conveyer-shaft according to claim 2 is characterized in that: pitch self-coal-inlet to coal outlet direction geometric ratio successively between per two adjacent helicallobes increases progressively.
5, variable pitch screw-conveyer-shaft according to claim 3 is characterized in that: self-coal-inlet is to the coal outlet direction, and first pitch is greater than 0.6 times of helicallobe diameter projected, and last pitch is less than 1.2 times of helicallobe diameter projected; Self-coal-inlet is to the coal outlet direction, and the pitch between per two adjacent helicallobes equal difference successively increases progressively, incremental change for last pitch deduct first pitch then divided by the resultant pitch number deduct 1 poor.
6, variable pitch screw-conveyer-shaft according to claim 3 is characterized in that: self-coal-inlet is to the coal outlet direction, and first pitch equals 0.8 times of helicallobe diameter projected, and last pitch equals 1.0 times of helicallobe diameter projected; Self-coal-inlet is to the coal outlet direction, and the pitch between per two adjacent helicallobes equal difference successively increases progressively, incremental change for last pitch deduct first pitch then divided by the resultant pitch number deduct 1 poor.
7, according to claim 1 or 2 or 3 or 4 or 5 or 6 described variable pitch screw-conveyer-shafts, it is characterized in that: self-coal-inlet is to the coal outlet direction, and the end of first helicallobe aligns with the coal inlet front panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620009278 CN200964297Y (en) | 2006-11-13 | 2006-11-13 | Spacing variable screw shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620009278 CN200964297Y (en) | 2006-11-13 | 2006-11-13 | Spacing variable screw shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200964297Y true CN200964297Y (en) | 2007-10-24 |
Family
ID=38868309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620009278 Expired - Fee Related CN200964297Y (en) | 2006-11-13 | 2006-11-13 | Spacing variable screw shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200964297Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103569686A (en) * | 2012-08-10 | 2014-02-12 | 无锡市麦杰机械工程有限公司 | Viscous powder material handling device |
| CN104828486A (en) * | 2015-04-14 | 2015-08-12 | 武汉科技大学 | Spiral feeding device for mould fluxes |
| CN105173572A (en) * | 2015-11-04 | 2015-12-23 | 浙江百纳橡塑设备有限公司 | Anti-blocking material conveyer |
| CN111659168A (en) * | 2020-05-28 | 2020-09-15 | 湖北众堃科技股份有限公司 | Horizontal screw conveyer for plate-and-frame filter press |
-
2006
- 2006-11-13 CN CN 200620009278 patent/CN200964297Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103569686A (en) * | 2012-08-10 | 2014-02-12 | 无锡市麦杰机械工程有限公司 | Viscous powder material handling device |
| CN104828486A (en) * | 2015-04-14 | 2015-08-12 | 武汉科技大学 | Spiral feeding device for mould fluxes |
| CN105173572A (en) * | 2015-11-04 | 2015-12-23 | 浙江百纳橡塑设备有限公司 | Anti-blocking material conveyer |
| CN111659168A (en) * | 2020-05-28 | 2020-09-15 | 湖北众堃科技股份有限公司 | Horizontal screw conveyer for plate-and-frame filter press |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071024 Termination date: 20131113 |