CN111359865A - Cooling classifying screen - Google Patents
Cooling classifying screen Download PDFInfo
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- CN111359865A CN111359865A CN202010166474.9A CN202010166474A CN111359865A CN 111359865 A CN111359865 A CN 111359865A CN 202010166474 A CN202010166474 A CN 202010166474A CN 111359865 A CN111359865 A CN 111359865A
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- screen
- screen drum
- frame
- drum
- screen cylinder
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- 238000001816 cooling Methods 0.000 title claims abstract description 61
- 238000012216 screening Methods 0.000 claims abstract description 52
- 239000002245 particle Substances 0.000 claims abstract description 22
- 239000000843 powder Substances 0.000 claims abstract description 17
- 230000005540 biological transmission Effects 0.000 claims abstract description 16
- 230000000149 penetrating effect Effects 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims description 46
- 230000007246 mechanism Effects 0.000 claims description 19
- 238000007599 discharging Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 10
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 9
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 9
- 241001330002 Bambuseae Species 0.000 claims description 9
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 9
- 239000011425 bamboo Substances 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 2
- 238000004513 sizing Methods 0.000 claims 6
- 235000007164 Oryza sativa Nutrition 0.000 abstract description 37
- 235000009566 rice Nutrition 0.000 abstract description 37
- 238000007873 sieving Methods 0.000 abstract description 7
- 235000013339 cereals Nutrition 0.000 abstract description 6
- 240000007594 Oryza sativa Species 0.000 abstract 1
- 241000209094 Oryza Species 0.000 description 36
- 230000000694 effects Effects 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 230000009467 reduction Effects 0.000 description 8
- 239000008187 granular material Substances 0.000 description 6
- 230000009471 action Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000005469 granulation Methods 0.000 description 3
- 230000003179 granulation Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000007791 dehumidification Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 230000001007 puffing effect Effects 0.000 description 1
- 230000002087 whitening effect Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/18—Drum screens
- B07B1/22—Revolving drums
- B07B1/24—Revolving drums with fixed or moving interior agitators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
- B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D31/00—Other cooling or freezing apparatus
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B2201/00—Details applicable to machines for screening using sieves or gratings
- B07B2201/04—Multiple deck screening devices comprising one or more superimposed screens
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Combined Means For Separation Of Solids (AREA)
Abstract
The invention discloses a cooling grading sieve.A transmission shaft (14) is installed in a sieving box body (16) on a rack (12) in a penetrating manner, a sieve drum frame (15) is installed on the transmission shaft (14), and an inner sieve drum (7) and an outer sieve drum (3) are installed on the sieve drum frame (15); the upper air suction cover (2) is arranged at the top of the screening box body (16), the lower air suction cover (9) is arranged at the bottom of the screening box body (16), the small powder particle collecting hopper (10) is arranged below the lower air suction cover (9), and an air inlet is reserved between the lower air suction cover (9) and the small powder particle collecting hopper (10) to form an air suction area (13) for air flow to enter the screening box body (16); the feed hopper (4) is installed above the side of the screening box body (16) in a penetrating way, and the large-particle discharge hopper (8) is installed below the side of the screening box body (16) on the same side with the feed hopper (4) in a penetrating way. The invention integrates the functions of induced draft cooling and screening, and is used for cooling rice and feed and screening broken grains.
Description
Technical Field
The invention belongs to the technology of material cooling and screening, and particularly relates to equipment for screening cold rice and broken rice in rice processing, and for performing air suction, temperature reduction, humidity reduction and particle screening after granulation and puffing in feed processing.
Background
In the rice processing technology, the phenomenon that broken rice is increased due to the fact that the temperature of rice grains is increased by whitening and polishing can occur. If the rice grains are not cooled, the strength of the rice grains is reduced, and the subsequent milled rice is increased; during the storage of the finished product, the rice is too warm, difficult to preserve and easy to deteriorate. Rice cooling equipment is usually arranged in a rice factory for cooling, and a rice cooling bin is generally arranged in the rice factory for cooling, but the cooling time is long and the effect is poor; the rice cooling bin has large volume, so that the occupied space of a workshop is increased; in addition, the rice cooling bin does not have the function of screening, and a rice grading screen is additionally arranged to sort broken rice in the rice.
In the feed processing technology, the problems of overhigh temperature and humidity of materials after feed granulation and expansion can occur. An air suction cooler is generally arranged in a feed factory for cooling and dehumidifying, but the volume of the air suction cooler is large, so that the air suction cooler occupies the space of the factory building; in addition, the granulated and expanded granular materials also generate powder granules, and the powder granules can be removed only by a separate grading sieve because the induced draft cooler does not have the function of sieving.
In a word, the cooling equipment used in the rice and feed processing at present is large in size and single in function.
Disclosure of Invention
The invention aims to: the cooling grading sieve is small in size, integrates the effects of air suction, temperature reduction, humidity reduction and sieving, can be used for cooling rice grains and sieving broken rice, and can also be used for cooling, temperature reduction, humidity reduction and sieving granulated feed after granulation and expansion.
The technical solution of the invention is as follows: the cooling grading sieve consists of a feeding and discharging mechanism, a sieving mechanism and an air suction mechanism which are arranged on a rack; the screening mechanism comprises a transmission shaft, a screen cylinder frame, an outer screen cylinder, an inner screen cylinder, inner screen cylinder inner spiral blades, outer screen cylinder inner spiral blades and a screening box body, the screening box body is installed on the frame, the transmission shaft is installed on the screening box body in a penetrating type horizontal axial direction, the transmission shaft is externally connected with a motor, the screen cylinder frame is installed on the transmission shaft in the screening box body, the outer screen cylinder and the inner screen cylinder are installed on the screen cylinder frame, the outer screen cylinder inner spiral blades are installed in the outer screen cylinder, and the inner screen cylinder inner spiral blades are installed in the inner screen cylinder; the feeding and discharging mechanism comprises a feeding hopper, a large particle discharging hopper and a small powder particle collecting hopper, the feeding hopper is installed above the side of the screening box body in a penetrating manner, and the large particle discharging hopper is installed below the side of the screening box body on the same side as the feeding hopper in a penetrating manner; the air suction mechanism comprises an upper air suction cover and a lower air suction cover, the upper air suction cover connected with an air suction opening is installed at the top of the screening box body, the lower air suction cover is installed at the bottom of the screening box body, a small powder particle collecting hopper is installed below the lower air suction cover on the rack, and an air inlet is reserved between the lower air suction cover and the small powder particle collecting hopper to form an air suction area for air supply to flow into the screening box body.
Furthermore, the feed hopper is in an inverted Y shape "
"; the lower end of the feed hopper is divided into two outlets which bypass the rotating shaft, and the materials are guided into the inner screen cylinder from two sides of the rotating shaft and fall into the inner screen cylinder; the lower edge of the outlet of the feed hopper is slightly higher than the upper edge of the helical blade in the inner screen drum to control the blanking height, so that impact crushing caused by too high blanking is avoided.
Furthermore, the inner wall of the outer screen drum is provided with inner spiral blades of the outer screen drum, and the inner wall of the inner screen drum is provided with inner spiral blades of the inner screen drum; the spiral blades in the inner screen cylinder are right-handed blades which are not less than four; the inner helical blades of the outer screen drum are left-handed blades, and are not less than four; the inner spiral blades of the outer screen drum and the inner spiral blades of the inner screen drum push the materials in the screen drum forwards along with the rotation of the screen drum frame.
Furthermore, the screen cylinder frame consists of an outer screen cylinder frame and an inner screen cylinder frame which are arranged on a tray of the screen cylinder frame; the screen drum frame tray comprises a disc, a cross-shaped supporting rod and a circular ring on the cross-shaped supporting rod, the disc is connected with the circular ring through four columns, four outlets are formed in the gap between the disc and the circular ring by the columns for the materials in the inner screen drum to flow into the outer screen drum, and the screen drum frame tray is assembled with the rotating shaft to rotate along with the shaft; the cylindrical outer screen drum frame comprises a cross-shaped supporting rod, outer screen drum frame cross beams and outer screen drum supporting brackets which are arranged on a circular ring of a screen drum frame tray, four outer screen drum frame cross beams are fixed on the circular disc and the cross-shaped supporting rod in a surrounding mode, and a plurality of outer screen drum supporting brackets are arranged around the four outer screen drum frame cross beams at intervals; the cylindrical inner screen drum frame comprises inner screen drum frame cross beams, cross-shaped inner screen drum supporting rods and inner screen drum supporting brackets, the four inner screen drum frame cross beams are arranged on a circular ring of a screen drum frame tray and the cross-shaped inner screen drum supporting rods in a surrounding mode, and the four inner screen drum frame cross beams are arranged on the inner screen drum supporting brackets at intervals; four groups of cross-shaped inner screen drum supporting rods are used for fixing four inner screen drum frame cross beams which are arranged on the rotating shaft at intervals and rotate along with the rotating shaft.
Furthermore, a cylindrical outer screen drum is arranged on the outer screen drum frame, and a cylindrical inner screen drum is arranged on the inner screen drum frame.
Furthermore, the screen meshes of the outer screen drum and the inner screen drum are all metal woven screen meshes, and the size of the screen meshes is selected according to the requirement of the grading granularity of the cooling material.
Furthermore, the feed end of the inner screen drum frame is provided with an inner screen drum retaining plate which is disc-shaped, the middle of the inner screen drum retaining plate is provided with a feed hole for a feed hopper to guide materials into the inner screen drum, and the materials are prevented from directly flowing out of the screen drum without being cooled and classified.
The invention has the advantages that:
1. the cooling grading sieve is used for air suction cooling and crushing and screening grading of various granular materials.
2. Because of induced draft cooling can lower the temperature and fall wet, after cooling classifying screen handles, improve material strength, can also carry out the classification through the screening simultaneously, select out the over-broken powder in the material, guarantee product particle size.
3. The cooling classifying screen utilizes the mode that selection by winnowing and screening combined together, reduces the temperature and wets through induced drafting, grades through the screening, increases material flow length, extension cooling time through two screen drums, and the heat exchange is abundant, guarantees the cooling effect, realizes that a wind is multi-purpose, a tractor serves several purposes, practices thrift investment and factory building space.
4. The cooling grading sieve is used for air suction cooling, humidity reduction and screening grading of granular materials, is particularly suitable for grading cold rice and broken rice in a rice factory, and air suction cooling, humidity reduction and small powder grain grading of granular feed in a feed factory, replaces a rice cooling bin and a white rice grading device in the rice factory, can improve the yield of rice after being used for each rice milling and polishing device in the rice factory, is beneficial to the storage of the rice, and replaces the traditional feed cooler and the traditional granular grading sieve in the feed factory.
5. The equipment has compact structure, convenient installation, simple maintenance, convenient operation and small occupied area, can cool and reduce humidity, can screen and grade, simplifies the process, reduces the equipment investment, has good adjustment performance, reduces the dynamic consumption, can be matched with the prior process and equipment for use, can be used for cooling and screening various granular materials such as rice factories, feed factories and the like, and has wider applicability.
Drawings
FIG. 1 is a front view of the outline structure of the apparatus of the present invention;
FIG. 2 is a right side view of the form construction of FIG. 1;
FIG. 3 is a top view of the form construction of FIG. 1;
FIG. 4 is a schematic diagram of the operation of the apparatus of the present invention;
FIG. 5 is a schematic diagram of the apparatus of the present invention;
FIG. 6 is a sectional view showing the internal structure of the apparatus of the present invention;
FIG. 7 is a front view of the feed hopper structure of FIG. 5
FIG. 8 is a right side view of the feed hopper configuration of FIG. 5
FIG. 9 is a front view of the combination structure of the screen cylinder, the screen cylinder frame and the inner helical blade of FIG. 5;
FIG. 10 is a cross-sectional view C-C of the screen cylinder, the screen cylinder frame and the inner helical blade assembly of FIG. 5;
FIG. 11 is a cross-sectional view D-D of the screen cylinder, the screen cylinder frame and the inner helical blade assembly of FIG. 5;
FIG. 12 is a right side view of the screen cylinder, screen cylinder frame and internal helical blade assembly of FIG. 5;
FIG. 13 is a front view of the screen frame structure of FIG. 9;
FIG. 14 is a right side view of the screen frame structure of FIG. 9;
FIG. 15 is a front view of the screen frame tray of FIG. 13;
FIG. 16 is a left side view of the screen frame tray of FIG. 13;
FIG. 17 is a right side view of the screen frame tray of FIG. 13;
FIG. 18 is a cross-sectional view of the screen frame tray E-E of FIG. 13;
fig. 19 is a cross-sectional view of the screen frame tray F-F of fig. 13.
In the figure: 1 is externally connected with an upper air suction opening of an air suction net, 2 is connected with an upper air suction cover, 3 is connected with an outer screen drum, 4 is a feed hopper, 5 is internally provided with a helical blade, 6 is internally provided with a helical blade, 7 is internally provided with a screen drum, 8 is large particles are discharged from the hopper, 9 is a lower air suction cover, 10 is a small powder collecting hopper, 11 is a small powder collecting hopper outlet, 12 is a frame, 13 is an air suction area, 14 is a transmission shaft, 15 is a screen drum frame, 16 is a screening box body, 17 is an outer screen drum supporting bracket, 18 is an inner screen drum supporting bracket, 19 is an inner screen drum supporting rod, 20 is an outer screen drum frame cross beam, 21 is an inner screen drum frame cross beam, 22 is an inner screen drum material baffle, 23 is a screen drum frame tray, 24 is a cross-shaped supporting rod, 25 is a disc of the screen drum frame tray, 26 is a circular ring of the screen drum frame tray, 27 is an outer screen drum.
Detailed Description
The technical scheme of the invention is further described with reference to the attached drawings, but the technical scheme is not to be construed as being limited, and the improvement on the basis of the technical scheme belongs to the protection scope of the invention. Of course, for the sake of brevity, some well-known components, such as a transmission mechanism, such as a motor, a fixed bolt, a bolt mounting position, a screening box shape structure, a frame, etc., are omitted from the drawings and the description.
As shown in fig. 1, 2 and 3, the outline structure of the cooling classifying screen is schematic, and the overall outline of the device is cuboid.
As shown in fig. 4, 5 and 6, the cooling classifying screen is composed of a feeding and discharging mechanism, a screening mechanism and an air suction mechanism which are arranged on a frame 12; the method is characterized in that: the screening mechanism comprises a transmission shaft 14, a screen cylinder frame 15, an outer screen cylinder 3, an inner screen cylinder 7, inner screen cylinder inner spiral blades 5, outer screen cylinder inner spiral blades 6 and a screening box body 16, wherein the screening box body 16 is installed on a rack 12, the transmission shaft 14 is installed on the screening box body 16 in a penetrating type horizontal axial direction, the transmission shaft 14 is externally connected with a motor, the screen cylinder frame 15 is installed on the transmission shaft 14 in the screening box body 16, the outer screen cylinder 3 and the inner screen cylinder 7 are installed on the screen cylinder frame 15, the outer screen cylinder inner spiral blades 6 are installed in the outer screen cylinder 3, and the inner screen cylinder inner spiral blades 5 are installed in the inner screen cylinder 7; the feeding and discharging mechanism comprises a feeding hopper 4, a large particle discharging hopper 8 and a small powder particle collecting hopper 10, the feeding hopper 4 is installed above the side of the screening box body 16 in a penetrating manner, and the large particle discharging hopper 8 is installed below the side of the screening box body 16 on the same side as the feeding hopper 4 in a penetrating manner; the air suction mechanism comprises an upper air suction cover 2 and a lower air suction cover 9, the upper air suction cover 2 connected with an air suction opening 1 is installed at the top of the screening box body 16, the lower air suction cover 9 is installed at the bottom of the screening box body 16, a small powder particle collecting hopper 10 is installed below the lower air suction cover 9 on the machine frame 12, and an air inlet is reserved between the lower air suction cover 9 and the small powder particle collecting hopper 10 to form an air suction area 13 for air to flow into the screening box body 16.
As shown in figures 5, 7, 8 and 12, the feed hopper 4 is of an inverted Y shape "
"; the lower end of the feed hopper 4 is divided into two outlets which bypass the rotating shaft 14, and materials are guided into the inner screen cylinder 7 from two sides of the rotating shaft 14 and fall into the inner screen cylinder; the lower edge of the outlet of the feed hopper 4 is slightly higher than the upper edge of the helical blade 5 in the inner screen drum to control the blanking height, so that impact crushing caused by too high blanking is avoided.
As shown in fig. 9, 10, 11 and 12, the inner wall of the outer screen drum 3 is provided with the outer screen drum inner spiral blades 6, and the inner wall of the inner screen drum 7 is provided with the inner screen drum inner spiral blades 5; the spiral blades 5 in the inner screen cylinder are right-handed blades, and are not less than four; the internal helical blades 6 of the external screen cylinder are left-handed blades, and are not less than four; the inner spiral blades 6 and 5 in the outer screen drum rotate together with the screen drum frame 15 to push the materials in the screen drum forward.
As shown in fig. 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, the screen cylinder frame 15 is composed of an outer screen cylinder frame 27 and an inner screen cylinder frame 28 which are mounted on a screen cylinder frame tray 23; the sieve drum frame tray 23 comprises a disc 25, a cross-shaped support rod 24 and a circular ring 26 on the cross-shaped support rod 24, the disc 25 is connected with the circular ring 26 through four columns 29, four outlets are formed in the gap between the disc 25 and the circular ring 26 through the columns 29, materials in the inner sieve drum flow into the outer sieve drum, and the sieve drum frame tray 23 is assembled with the rotating shaft 14 and rotates along with the rotating shaft 14; the cylindrical outer screen drum frame 27 comprises a cross-shaped support rod 24 on a screen drum frame tray circular ring 26, outer screen drum frame cross beams 20 and outer screen drum supporting brackets 17, the four outer screen drum frame cross beams 20 are fixed on a circular disc 25 and the cross-shaped support rod 24 in a surrounding manner, and a plurality of outer screen drum supporting brackets 17 are arranged around the four outer screen drum frame cross beams 20 at intervals; the cylindrical inner screen drum frame 28 comprises inner screen drum frame cross beams 21, cross-shaped inner screen drum support rods 19 and inner screen drum supporting brackets 18, wherein the four inner screen drum frame cross beams 21 are arranged on a circular ring 26 of a screen drum frame tray 23 and the cross-shaped inner screen drum support rods 19 in a surrounding manner, and the four inner screen drum frame cross beams 21 are arranged on the plurality of inner screen drum supporting brackets 18 at intervals; four groups of cross-shaped inner screen cylinder supporting rods 19 are used for fixing four inner screen cylinder frame cross beams 21 which are arranged on the rotating shaft 14 at intervals and rotate along with the rotating shaft 14.
As shown in fig. 9, 10, 11, 12, and 13, the outer screen cylinder 3 having a cylindrical shape is mounted on the outer screen cylinder frame 27, and the inner screen cylinder 7 having a cylindrical shape is mounted on the inner screen cylinder frame 28.
Furthermore, the screens of the outer screen drum 3 and the inner screen drum 7 are all metal woven screens, and the sizes of the screen holes are selected according to the requirement of the grading granularity of the cooling materials.
Furthermore, the feeding end of the inner screen drum frame 28 is provided with an inner screen drum retaining plate 22, the inner screen drum retaining plate 22 is disc-shaped, and the middle of the inner screen drum retaining plate 22 is provided with a feeding hole for a feeding hopper to guide materials into the inner screen drum 7, and the materials are prevented from directly flowing out of the screen drum without cooling and grading.
The principle of the invention is as follows: the cooling classifying screen selects double screen drums with proper screen holes by utilizing the mode of combining winnowing and screening, the double screen drums rotate together and are matched with air flow with proper air quantity, the air flow passes through the screen drums, materials in the screen are subjected to induced draft cooling, and meanwhile the materials are screened and classified when passing through the screen drums. The material flow direction of the cooling grading sieve is perpendicular to the air flow direction, the flow length of the material in the sieve cylinder is prolonged by using the double sieve cylinders, the cooling time is prolonged, the material is secondarily cooled by the inner sieve cylinder and the outer sieve cylinder, and the air flow is secondarily utilized. When the material is cooled for the first time through the inner screen drum, the material temperature is high, the air flow temperature is also increased, when the material enters the outer screen drum to be cooled for the second time, the material temperature is reduced, at the moment, the air flow temperature of the material entering the machine is also lower, a temperature gradient is formed, and the cooling effect is favorably improved. Spiral guide blades are arranged in the inner screen cylinder and the outer screen cylinder respectively, so that materials in the screen cylinder are pushed, the pushing speed is controlled by adjusting the rotating speed, the cooling time is controlled, and the process effect is improved. The material is cooled secondarily in the screen drum, airflow is secondarily utilized, heat exchange is sufficient, and the cooling effect is good.
The working process of the invention is as follows: as shown in fig. 4 and 5, the material is introduced from the feed hopper 4 and falls into the inner screen drum 7, and is pushed towards the screen drum bracket tray 23 under the action of the helical blades 5 in the inner screen drum, and the material contacts the inner screen drum 7 in the pushing process, and the small-granularity material passes through the screen holes of the inner screen drum 7 and falls into the outer screen drum 3; materials are pushed to a sieve barrel frame tray 23 under the action of the spiral blades 5 in the inner sieve barrel, fall into the outer sieve barrel 3 from an outlet of the tray 23, and are pushed to a large-particle discharge hopper 8 and discharged under the action of the spiral blades 6 in the outer sieve barrel; in the propelling process, materials are contacted with the outer screen drum 3, and the materials with small particle sizes pass through the screen holes, are collected by the collecting hopper 10 and are discharged from the outlet 11 of the small powder particle collecting hopper; in the process that materials are pushed in the inner screen drum 7 and the outer screen drum 3, airflow is sucked in from an air suction area 13 through the lower air suction cover 9, passes through the outer screen drum 3 and then passes through the inner screen drum 7, the materials in the screen drum are subjected to air suction and cooling through the action of the airflow from bottom to top, and then the airflow enters the external air suction net through the upper air suction opening 1 through the upper air suction cover 2 and is discharged; the material obtains the secondary cooling in two sieve section of thick bamboo, obtains the first cooling and dehumidification of induced drafting in inner sieve section of thick bamboo 7, obtains the second cooling and dehumidification of induced drafting in outer sieve section of thick bamboo 3.
The cooling grading sieve provided by the invention is applied to rice factories and feed factories, achieves a good effect, can realize double functions of cooling and sieving, and has a good cooling process effect. Through inspection and comparison: the energy consumption of each ton of material can be reduced by 0.5 ℃, and the cooling time is shortened by more than 8 hours. In addition, the cooling and grading sieve has multiple functions, so that the investment and the plant space can be saved. Can improve the rice yield by 0.5 percent when being used in rice factories, and improves the economic benefit.
Claims (7)
1. The cooling grading screen consists of a feeding and discharging mechanism, a screening mechanism and an air suction mechanism which are arranged on the frame (12); the method is characterized in that: the screening mechanism comprises a transmission shaft (14), a screen cylinder frame (15), an outer screen cylinder (3), an inner screen cylinder (7), inner screen cylinder inner spiral blades (5), outer screen cylinder inner spiral blades (6) and a screening box body (16), wherein the screening box body (16) is installed on a rack (12), the transmission shaft (14) is installed on the screening box body (16) in a penetrating type horizontal axial direction, the transmission shaft (14) is externally connected with a motor, the screen cylinder frame (15) is installed on the transmission shaft (14) in the screening box body (16), the outer screen cylinder (3) and the inner screen cylinder (7) are installed on the screen cylinder frame (15), the outer screen cylinder inner spiral blades (6) are installed in the outer screen cylinder (3), and the inner screen cylinder inner spiral blades (5) are installed in the inner screen cylinder (7); the feeding and discharging mechanism comprises a feeding hopper (4), a large particle discharging hopper (8) and a small particle collecting hopper (10), the feeding hopper (4) is installed above the side of the screening box body (16) in a penetrating manner, and the large particle discharging hopper (8) is installed below the side of the screening box body (16) on the same side as the feeding hopper (4) in a penetrating manner; the mechanism that induced drafts include cover (2), lower suction hood (9) of induced drafting, connect cover (2) of induced drafting on of inlet scoop (1) to install at the top of screening box (16), install the bottom at screening box (16) down suction hood (9), lie in on frame (12) down cover (9) below installation tiny powder and collect fill (10), leave between lower suction hood (9) and tiny powder and collect fill (10) and leave the air intake and form the regional (13) air feed stream that induced drafts and enter screening box (16).
2. The cooling sizing screen as defined in claim 1 wherein: the feed hopper (4) is of an inverted Y shape "
"; the lower end of the feed hopper (4) is divided into two outlets, bypasses the rotating shaft (14), and leads the materials into the inner screen cylinder (7) from two sides of the rotating shaft (14); the lower edge of the outlet of the feed hopper (4) is slightly higher than the upper edge of the helical blade (5) in the inner screen drum to control the blanking height, so that impact crushing caused by too high blanking is avoided.
3. The cooling sizing screen as defined in claim 1 wherein: the inner wall of the outer screen drum (3) is provided with an outer screen drum inner spiral blade (6), and the inner wall of the inner screen drum (7) is provided with an inner screen drum inner spiral blade (5); the inner helical blades (5) of the inner screen cylinder are right-handed blades, and are not less than four; the inner spiral blades (6) of the outer screen drum are left-handed blades, and are not less than four; the inner helical blade (6) of the outer screen drum and the inner helical blade (5) of the inner screen drum rotate together with the screen drum frame (15) to push the materials in the screen drum forward.
4. The cooling sizing screen as defined in claim 1 wherein: the screen cylinder frame (15) consists of an outer screen cylinder frame (27) and an inner screen cylinder frame (28) which are arranged on a screen cylinder frame tray (23); the sieve drum frame tray (23) comprises a disc (25), a cross-shaped support rod (24) and a circular ring (26) on the cross-shaped support rod (24), the disc (25) is connected with the circular ring (26) through four columns (29), four outlets are formed in a gap between the disc (25) and the circular ring (26) by the columns (29) for materials in the inner sieve drum to flow into the outer sieve drum, and the sieve drum frame tray (23) is assembled with the rotating shaft (14) to rotate along with the shaft; the cylindrical outer screen drum frame (27) comprises cross-shaped supporting rods (24) on a screen drum frame tray circular ring (26), outer screen drum frame cross beams (20) and outer screen drum supporting brackets (17), four outer screen drum frame cross beams (20) are fixed on a circular disc (25) and the cross-shaped supporting rods (24) in a surrounding mode, and a plurality of outer screen drum supporting brackets (17) are installed around the four outer screen drum frame cross beams (20) at intervals; the cylindrical inner screen drum frame (28) comprises inner screen drum frame cross beams (21), cross-shaped inner screen drum support rods (19) and inner screen drum supporting brackets (18), wherein the four inner screen drum frame cross beams (21) are arranged on a circular ring (26) of a screen drum frame tray (23) and the cross-shaped inner screen drum support rods (19) in a surrounding manner, and the four inner screen drum frame cross beams (21) are arranged on the plurality of inner screen drum supporting brackets (18) at intervals in a surrounding manner; four groups of cross-shaped inner screen cylinder support rods (19) are used for fixing four inner screen cylinder frame cross beams (21), are arranged on the rotating shaft (14) at intervals and rotate along with the rotating shaft (14).
5. The cooling sizing screen of claim 4, wherein: the outer screen drum frame (27) is provided with a cylindrical outer screen drum (3), and the inner screen drum frame (28) is provided with a cylindrical inner screen drum (7).
6. The cooling sizing screen as defined in claim 5 wherein: the screen meshes of the outer screen drum (3) and the inner screen drum (7) are all metal woven screen meshes, and the size of the screen meshes is selected according to the requirement of the grading granularity of the cooling material.
7. The cooling sizing screen of claim 4, wherein: the feed end of interior sieve section of thick bamboo frame (28) establish interior sieve section of thick bamboo shelves flitch (22), interior sieve section of thick bamboo shelves flitch (22) are the disc, open the centre of interior sieve section of thick bamboo shelves flitch (22) has the feed port to supply in the feeder hopper with the leading-in interior sieve section of thick bamboo (7) of material to prevent that the material from not cooling, directly flowing out a sieve section of thick bamboo in grades.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010166474.9A CN111359865B (en) | 2020-03-11 | 2020-03-11 | Cooling classifying screen |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010166474.9A CN111359865B (en) | 2020-03-11 | 2020-03-11 | Cooling classifying screen |
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| CN111359865A true CN111359865A (en) | 2020-07-03 |
| CN111359865B CN111359865B (en) | 2024-08-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113245180A (en) * | 2021-04-15 | 2021-08-13 | 河南工业大学 | Powder grading system |
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| JP5376735B1 (en) * | 2012-06-13 | 2013-12-25 | 井上電設株式会社 | Pellet cooling and sieving and conveying equipment |
| CN207108856U (en) * | 2017-08-15 | 2018-03-16 | 新疆金圣胡杨化工有限公司 | Sieve cooling integrated machine |
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| CN212493843U (en) * | 2020-03-11 | 2021-02-09 | 江苏财经职业技术学院 | Cooling classifying screen |
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2020
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| JP5376735B1 (en) * | 2012-06-13 | 2013-12-25 | 井上電設株式会社 | Pellet cooling and sieving and conveying equipment |
| CN207108856U (en) * | 2017-08-15 | 2018-03-16 | 新疆金圣胡杨化工有限公司 | Sieve cooling integrated machine |
| CN209810249U (en) * | 2019-01-29 | 2019-12-20 | 江苏财经职业技术学院 | Rice cooling bran extractor |
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| CN113245180A (en) * | 2021-04-15 | 2021-08-13 | 河南工业大学 | Powder grading system |
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