CN212856632U - Grit grading system - Google Patents
Grit grading system Download PDFInfo
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- CN212856632U CN212856632U CN202021886957.8U CN202021886957U CN212856632U CN 212856632 U CN212856632 U CN 212856632U CN 202021886957 U CN202021886957 U CN 202021886957U CN 212856632 U CN212856632 U CN 212856632U
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Abstract
A sand and stone grading system comprises a powder selecting device, a centrifugal fan and an air separation chamber, wherein the powder selecting device comprises a static powder selecting device and a dynamic powder selecting device, the static powder selecting device and the dynamic powder selecting device are respectively provided with an air inlet and an air outlet, the centrifugal fan is connected with the air inlet through a first pipeline, the air separation chamber is connected with the air outlet through a second pipeline, the upper end of the air separation chamber is also provided with an air return inlet, and the air return inlet is connected with the centrifugal fan or the first pipeline through a third pipeline; the upper end and the lower end of the static powder selecting device are respectively provided with a feeding hole and a first discharging hole, a second discharging hole is also arranged on the feeding channel, and a third discharging hole is arranged on the air separation chamber; the air outlet of the device is connected with the air inlet of the fan, so that closed cycle of a powder selecting system is realized, the pollution to the environment can be reduced, the power of the fan can be reduced, the effects of saving energy and reducing consumption are achieved, and the winnowing effect is improved; the dynamic powder concentrator can adjust the powder content in the finished sand so as to meet the requirement of controlling the component content of the manufactured sand.
Description
Technical Field
The utility model relates to a grit aggregate production technical field, in particular to grit grading system.
Background
At the present stage, large-scale infrastructure construction in China consumes a large amount of natural resources, high-quality river sand resources are less and less, river channel ecology is seriously damaged due to excessive unordered excavation, measures and regulations for forbidding river channel sand collection are stricter and stricter, and a river sand road is narrower and narrower, so that sand making is rapidly becoming a main sand source for building sand. The sand making is to sort the sand through winnowing, the existing winnowing and powder removing machine can only realize three separations, namely, coarse sand, fine sand and powder, the powder selecting machine cannot control the content of powder, so that the gradation of the machine-made sand cannot be adjusted, and the artificial sand has good gradation and must be adjusted by a grinder, so that the investment of equipment is increased, and the production cost is also improved.
In addition, in the sand making process, most of powder selecting systems adopt an open circuit mode to select powder, and the power of a fan is required to be very high, so that the resource consumption caused by powder selection is high, the production cost is increased on the one hand, certain waste is carried out on energy on the other hand, and the production mode of the open circuit makes the screening of sand and stone exposed in the air, and the environmental pollution is also caused.
There is a need for a sand grading system to address this problem.
SUMMERY OF THE UTILITY MODEL
To the above situation, in order to overcome the defects of the prior art, the present invention aims to provide a sand grading system, which effectively solves the above problems.
The technical scheme who solves is, the utility model discloses a selection powder device, centrifugal fan and air separator, the selection powder device includes static selection powder device and dynamic selection powder device, be equipped with air intake and air outlet respectively on static selection powder device and the dynamic selection powder device, centrifugal fan passes through first pipeline and is connected with the air intake, the air separator passes through the second pipeline and is connected with the air outlet, the upper end of air separator still is equipped with the return air inlet, the return air inlet passes through the third pipeline and is connected with centrifugal fan or first pipeline;
the upper end and the lower end of the static powder selecting device are respectively provided with a feeding hole and a first discharging hole, the dynamic powder selecting device is provided with a feeding channel communicated with the first discharging hole, the feeding channel is provided with a material returning control valve, the feeding channel is also provided with a second discharging hole, and the winnowing chamber is provided with a third discharging hole.
The utility model has the advantages that: the utility model discloses novel structure, the design is ingenious, and the device air outlet links to each other with the fan air intake and has realized the closed cycle of whole selection powder system, and the problem that the pipeline is not tight can be solved to the inside negative pressure that forms of whole system, prevents and treats that the inside gas of system leaks, can reduce the pollution to the environment, can reduce the power of fan simultaneously, reduce cost plays energy saving and consumption reduction's effect, and improves the selection by winnowing effect; the dynamic powder concentrator can adjust the powder content in the finished sand and well control the fineness modulus so as to meet the requirement of controlling the component content of the manufactured sand.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural diagram of the powder selecting device of the present invention.
Detailed Description
The following describes the embodiments of the present invention in further detail with reference to the accompanying drawings.
Example (b):
as shown in figures 1 to 2, the utility model comprises a powder selecting device, a centrifugal fan 1 and an air separation chamber 2, wherein the powder selecting device comprises a static powder selecting device 3 and a dynamic powder selecting device 4, the static powder selecting device 3 and the dynamic powder selecting device 4 are respectively provided with an air inlet 5 and an air outlet 6, the centrifugal fan 1 is connected with the air inlet 5 through a first pipeline 7, the air separation chamber 2 is connected with the air outlet 6 through a second pipeline 8, the upper end of the air separation chamber 2 is also provided with a return air inlet 9, the return air inlet 9 is connected with the centrifugal fan 1 or the first pipeline 7 through a third pipeline 10, so that the powder selecting device is separated, a negative-pressure air circulation channel is formed between the centrifugal fan 1 and the air separation chamber 2, so that the problem of poor pipeline sealing can be solved, gas in the device is prevented from leaking, the pollution to the external environment is reduced, the power of the fan is reduced, the production cost is reduced, and the effects of energy conservation and consumption reduction are achieved;
the upper end and the lower end of the static powder selecting device 3 are respectively provided with a feeding hole 11 and a first discharging hole 12, coarse sand formed after screening by the static powder selecting device 3 can be discharged through the first discharging hole 12, the dynamic powder selecting device 4 is provided with a feeding channel 13 communicated with the first discharging hole 12, fine sand formed after screening by the dynamic powder selecting device 4 can be fed into the first discharging hole to be discharged together with the coarse sand, the feeding channel 13 is provided with a material returning control valve 14, the feeding channel 13 is also provided with a second discharging hole 15 at the upper side of the material returning control valve 14, the feeding speed of the fine sand flowing to the first discharging hole 12 can be adjusted by adjusting the material returning control valve 14, the proportion of the coarse sand and the fine sand in the finished sand discharged from the first discharging hole 12 is sequentially adjusted, the redundant fine sand is discharged through the second discharging hole 15, in addition, after the material returning control valve 14 is completely closed, the fine sand formed after screening by the dynamic powder selecting device 4 can be discharged only through the second discharging hole 15, relatively pure fine sand is formed, and a third discharge port 16 is formed on the air separation chamber 2, so that the powder entering the air separation chamber 2 is discharged through the third discharge port 16.
The static powder selecting device 3 comprises a static powder selecting chamber 17, a plurality of turning plates 18 are uniformly distributed in the static powder selecting chamber 17, the turning plates 18 can blow the machine-made sand fed through the feed port 11 in the air to impact on the turning plates 18, so that the machine-made sand is scattered, the powder and the fine sand in the machine-made sand are fed into the dynamic powder selecting device 4 through the air speed, a plurality of wind shields 19 which are arranged in a row are arranged at the air inlet 5 in the static powder selecting chamber 17, the wind shields 19 are rotatably arranged in the static powder selecting chamber 17, an adjusting knob for adjusting the rotation angle of the wind shields 19 is further arranged on the static powder selecting chamber 17, and the direction of the air entering the static powder selecting chamber 17 and the air speed blowing to the dynamic powder selecting device 4 are adjusted through adjusting the angle of the wind shields 19, so that the device can adjustably screen coarse sand with various particle sizes.
The dynamic powder selecting device 4 comprises a dynamic powder selecting chamber 20 hermetically connected with the right side of a static powder selecting chamber 17, a powder selecting impeller is rotatably installed in the dynamic powder selecting chamber 20, an air outlet 6 is arranged in the powder selecting impeller, the powder selecting impeller rotates clockwise, the lower side of the powder selecting impeller is in clearance connection with the dynamic powder selecting chamber 20, so that air cannot easily penetrate through the lower side of the powder selecting impeller, machine-made sand entering the dynamic powder selecting chamber 20 is beaten on the rotating powder selecting impeller, part of powder can enter the powder selecting impeller and enters the air separation chamber 2 through the air outlet 6, the right side of the dynamic powder selecting chamber 20 is of an arc-shaped structure concentric with the powder selecting impeller, one end of a feeding channel 13 is communicated with the lower end of the arc-shaped structure of the dynamic powder selecting chamber 20, the other end of the feeding channel 13 is communicated with the lower end of the static powder selecting chamber 17, the rest of the machine-made sand sieved from the powder is beaten on the arc-shaped side wall on the right, and slides down the feed channel 13.
The powder selecting impeller comprises a wheel shaft 22 and wheel hubs arranged at the front end and the rear end of the wheel shaft 22, a plurality of annular fins 23 are arranged on the wheel hubs, a cavity is formed between the fins 23 and the wheel shaft 22, a powder selecting opening 24 is formed between the fins 23, a plurality of cross channels 25 are further arranged on the wheel shaft 22, the number of the channels is not fixed by the cross channels 25, the cross channels can be star-shaped channels, pentagram-shaped channels and the like, an air outlet 6 is communicated with the center of the cross channels 25, and powder with small particle size passes through the powder selecting opening 24, enters the cavity, passes through the cross channels 25 through wind power and is sent out through the air outlet 6.
The connection part of the first pipeline 7 and the air inlet 5 of the static powder selecting chamber 17 is also connected with a dust remover 26, and the dust remover 26 can remove dust in the circulated gas, so that the powder selecting effect and the quality of finished sand are ensured.
The winnowing chamber 2 is a cyclone powder separator, the cyclone powder separator is a common device in the prior art, the specific structure is not described, the inlet of the cyclone powder separator is hermetically connected with the second pipeline 8, the outlet of the cyclone powder separator is hermetically connected with the third pipeline 10, and the third discharge hole 16 is arranged at the lower end of the cyclone powder separator.
The utility model discloses when using, the raw materials that the particle size is less than 5mm gets into static selection powder room 17, break up the mechanism sand, the part particle size wherein is 0.075-0.15 mm's fine sand and the powder that the particle size is less than 0.075mm through the wind speed and bring into dynamic selection powder room 20, wherein lose the raw materials formation coarse sand of most fine sand and powder and discharge through first discharge gate 12, then pass through dynamic selection powder room 20 through the rotation of impeller with the powder discharge to air separation chamber 2 in the mechanism sand, and the fine sand of selecting can get into the gradation regulation of mechanism sand in the finished product material through the return pipe, perhaps discharge through the second bin outlet and form finished product fine sand, the powder carries out the 0.075mm powder separation in the secondary separation with the powder through air separation chamber 2 at last.
The utility model has the advantages that: the utility model discloses novel structure, the design is ingenious, and the device air outlet links to each other with the fan air intake and has realized the closed cycle of whole selection powder system, and the problem that the pipeline is not tight can be solved to the inside negative pressure that forms of whole system, prevents and treats that the inside gas of system leaks, can reduce the pollution to the environment, can reduce the power of fan simultaneously, reduce cost plays energy saving and consumption reduction's effect, and improves the selection by winnowing effect; the dynamic powder concentrator can adjust the powder content in the finished sand and well control the fineness modulus so as to meet the requirement of controlling the component content of the manufactured sand.
The foregoing detailed description/examples are specific embodiments of the present invention, and are intended to be illustrative of the principles of the present invention, which are intended to be illustrative and exemplary, and should not be construed as limiting the scope of the present invention. In addition to the embodiments described herein, those skilled in the art will be able to employ other technical solutions which are obvious based on the disclosure of the claims and the specification of the present application, and these technical solutions include those which make any obvious replacement or modification of the embodiments described herein, and all of which are within the scope of the present invention. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present invention is not limited to the particular embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.
Claims (4)
1. A sand and stone grading system comprises a powder selecting device, a centrifugal fan (1) and a winnowing chamber (2), and is characterized in that the powder selecting device comprises a static powder selecting device (3) and a dynamic powder selecting device (4), an air inlet (5) and an air outlet (6) are respectively arranged on the static powder selecting device (3) and the dynamic powder selecting device (4), the centrifugal fan (1) is connected with the air inlet (5) through a first pipeline (7), the winnowing chamber (2) is connected with the air outlet (6) through a second pipeline (8), a return air inlet (9) is further arranged at the upper end of the winnowing chamber (2), and the return air inlet (9) is connected with the centrifugal fan (1) or the first pipeline (7) through a third pipeline (10); the upper end and the lower end of the static powder selecting device (3) are respectively provided with a feeding hole (11) and a first discharging hole (12), the dynamic powder selecting device (4) is provided with a feeding channel (13) communicated with the first discharging hole (12), the feeding channel (13) is provided with a material returning control valve (14), the feeding channel (13) is also provided with a second discharging hole (15), and the winnowing chamber (2) is provided with a third discharging hole (16).
2. A sand grading system according to claim 1, wherein the dynamic powder selection device (4) comprises a dynamic powder selection chamber (20), a powder selection impeller is rotatably mounted in the dynamic powder selection chamber (20), and the air outlet (6) is arranged in the powder selection impeller.
3. A sand grading system according to claim 1, wherein a dust separator (26) is connected to the connection between the first conduit (7) and the inlet (5) of the static dust selection chamber (17).
4. A sand grading system according to claim 1, wherein the air separation chamber (2) is a cyclone separator, the inlet of which is sealingly connected to the second duct (8), the outlet of which is sealingly connected to the third duct (10), and the third outlet (16) is arranged at the lower end of the cyclone separator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021886957.8U CN212856632U (en) | 2020-09-02 | 2020-09-02 | Grit grading system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021886957.8U CN212856632U (en) | 2020-09-02 | 2020-09-02 | Grit grading system |
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| Publication Number | Publication Date |
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| CN212856632U true CN212856632U (en) | 2021-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021886957.8U Active CN212856632U (en) | 2020-09-02 | 2020-09-02 | Grit grading system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111940294A (en) * | 2020-09-02 | 2020-11-17 | 河南中誉鼎力智能装备有限公司 | Grit grading system |
| CN117019638A (en) * | 2023-05-25 | 2023-11-10 | 河南黎明重工科技股份有限公司 | A closed-circuit and open-circuit complementary circulating wind screening process sand making building |
-
2020
- 2020-09-02 CN CN202021886957.8U patent/CN212856632U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111940294A (en) * | 2020-09-02 | 2020-11-17 | 河南中誉鼎力智能装备有限公司 | Grit grading system |
| CN111940294B (en) * | 2020-09-02 | 2024-10-22 | 河南中誉鼎力智能装备有限公司 | Sand grading system |
| CN117019638A (en) * | 2023-05-25 | 2023-11-10 | 河南黎明重工科技股份有限公司 | A closed-circuit and open-circuit complementary circulating wind screening process sand making building |
| CN117019638B (en) * | 2023-05-25 | 2026-02-13 | 河南黎明重工科技股份有限公司 | A sand making tower using a closed-circuit and open-circuit complementary circulating air-powered screening process |
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