CN112934391A - Grit screening carries all-in-one - Google Patents
Grit screening carries all-in-one Download PDFInfo
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- CN112934391A CN112934391A CN202110109404.4A CN202110109404A CN112934391A CN 112934391 A CN112934391 A CN 112934391A CN 202110109404 A CN202110109404 A CN 202110109404A CN 112934391 A CN112934391 A CN 112934391A
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- conveying
- rotary screen
- conveying mechanism
- hopper
- screen
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
- B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
- B02C18/08—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within vertical containers
- B02C18/10—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within vertical containers with drive arranged above container
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
- B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
- B02C18/16—Details
- B02C18/22—Feed or discharge means
- B02C18/2216—Discharge means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/10—Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone
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- 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
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- 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
- B07B1/42—Drive mechanisms, regulating or controlling devices, or balancing devices, specially adapted for screens
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- 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
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- 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
- B07B1/50—Cleaning
- B07B1/55—Cleaning with fluid jets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G15/00—Conveyors having endless load-conveying surfaces, i.e. belts and like continuous members, to which tractive effort is transmitted by means other than endless driving elements of similar configuration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G33/00—Screw or rotary spiral conveyors
- B65G33/08—Screw or rotary spiral conveyors for fluent solid materials
- B65G33/14—Screw or rotary spiral conveyors for fluent solid materials comprising a screw or screws enclosed in a tubular housing
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Combined Means For Separation Of Solids (AREA)
Abstract
The invention discloses a sand and stone screening and conveying integrated machine which is characterized in that: the device comprises a rack, a hopper, a first spiral conveying mechanism, a drum screen, an outer cover, a main motor, a second spiral conveying mechanism and a belt conveying mechanism; the rotary screen is rotatably arranged on the frame and is obliquely arranged, and the main motor is used for driving the rotary screen to rotate; the first spiral conveying mechanism is arranged between the hopper and the rotary screen and is used for conveying materials in the hopper into the high end of the rotary screen; the outer cover is provided with a coarse material outlet and a fine material outlet; the second spiral conveying mechanism is used for conveying the fine materials screened out by the drum screen into the fine material outlet; the belt conveying mechanism is used for conveying the fine materials discharged from the fine material outlet. The invention is used for coarse and fine screening and conveying of sand and stones, thereby not only avoiding the influence on screening and conveying efficiency caused by more or less materials entering the drum screen, but also avoiding the problem of accumulation of screened materials, and keeping stable and efficient work.
Description
Technical Field
The invention relates to mechanical equipment, in particular to a sand screening and conveying integrated machine.
Background
In the processing and production process of the sand, the sand needs to be classified according to the thickness by screening so as to obtain the concrete material meeting the requirement. The prior sand screening machine for screening sand and stone has the following defects when in use:
firstly, as the discharge hole of the hopper obliquely extends into the high end of the drum screen, materials at the discharge hole of the hopper are not easy to fall off during feeding, and more materials enter the drum screen, the screening quality and the screening efficiency are seriously influenced;
secondly, due to irregular gravels, the screen holes on the drum screen are easy to block and difficult to find during screening, and manual cleaning in a halt state is very troublesome at present; in addition, the screen holes on the drum screen can be extruded to be enlarged, so that the normal performance of the drum screen is seriously influenced;
thirdly, as the discharge hopper is arranged below the drum screen, the screened fine materials are not easy to fall in the discharge hopper and are more and less in time, so that the fine materials in the discharge hopper are blocked and accumulated, the normal screening and discharging of the drum screen are influenced, and the conveying efficiency is low when a belt below the outlet of the discharge hopper is conveyed;
fourthly, because the feeding, screening and discharging of the drum screen are carried out simultaneously, any problem can affect the whole production efficiency.
Disclosure of Invention
In order to overcome one or more defects in the prior art, the invention provides a sand screening and conveying all-in-one machine.
In order to achieve the aim, the invention provides a sand and stone screening and conveying integrated machine which is characterized in that: comprises a frame (1), a hopper (2), a first spiral conveying mechanism (3), a drum screen (4), an outer cover (5), a main motor (6), a second spiral conveying mechanism (7) and a belt conveying mechanism (8);
the hopper (2) is fixedly arranged on the frame (1);
the rotary screen (4) is rotatably arranged on the frame (1) and is obliquely arranged, and the main motor (6) is used for driving the rotary screen (4) to rotate;
the first spiral conveying mechanism (3) is arranged between the hopper (2) and the rotary screen (4) and is used for conveying the materials in the hopper (2) into the high end of the rotary screen (4);
the outer cover (5) is sleeved on the rotary screen (4) and arranged at intervals, and a coarse material outlet (5-1) and a fine material outlet (5-2) are arranged on the outer cover (5);
the second spiral conveying mechanism (7) is arranged between the inner wall of the outer cover (5) and the outer wall of the rotary screen (4) and is positioned below the rotary screen (4), and the second spiral conveying mechanism (7) is used for conveying fine materials screened out by the rotary screen (4) into the fine material outlet (5-2);
the belt conveying mechanism (8) is arranged below the outer cover (5) and is used for conveying the fine materials discharged from the fine material outlet (5-2).
By adopting the scheme, the hopper (2) is filled with materials (sand and stone) to be screened, the materials in the hopper (2) are conveyed into the high end of the rotary screen (4) through the first spiral conveying mechanism (3), the main motor (6) drives the rotary screen (4) to rotate, and the materials in the rotary screen (4) simultaneously rotate and axially move downwards due to the inclined arrangement of the rotary screen (4); wherein the fine material part is screened by the rotary screen (4) and falls into the outer cover (5), and then is sent into the fine material outlet (5-2) by the second spiral conveying mechanism (7), and then the belt conveying mechanism (8) conveys the fine material discharged from the fine material outlet (5-2) into a fine material bin or a stirring station; the coarse material part can roll out from the lower end of the drum screen (4) after failing to pass through the screen, and then falls into the outer cover (5) and falls out from the coarse material outlet (5-1).
According to the technical scheme, the first spiral conveying mechanism (3) is arranged between the hopper (2) and the rotary screen (4) and is used for conveying materials in the hopper (2) into the high end of the rotary screen (4), and the materials in the hopper (2) are conveyed into the high end of the rotary screen (4) quantitatively and uniformly, so that the problems that the screening is insufficient due to excessive sand falls into the rotary screen (4), and further, part of fine sand falls out of the lower end cylinder opening of the rotary screen (4) and falls out of a coarse material outlet (5-1), and the screening is insufficient, so that the materials are wasted or secondary screening is needed are solved; meanwhile, the problems of low production efficiency and high energy consumption cost caused by insufficient screening capacity due to too little sand falling into the drum screen (4) are avoided;
according to the technical scheme, the second spiral conveying mechanism (7) is arranged between the inner wall of the outer cover (5) and the outer wall of the rotary screen (4) and is positioned below the rotary screen (4), the second spiral conveying mechanism (7) can convey fine materials screened out by the rotary screen (4) into the fine material outlet (5-2) in a quantitative and uniform mode, the problem of accumulation cannot occur in the outer cover (5), and meanwhile, the belt conveying mechanism (8) conveys the fine materials discharged in the fine material outlet (5-2) in a quantitative and uniform mode into a fine material bin or a stirring station;
in addition, the first spiral conveying mechanism (3) and the second spiral conveying mechanism (7) are used for simultaneously and quantitatively and uniformly conveying, so that the consistency of feeding, screening, discharging, conveying and other rhythms of the drum screen is ensured, and the whole production efficiency is improved.
Preferably, the first screw conveying mechanism (3) comprises a first conveying cylinder (3-1), a first screw shaft (3-2) and a first motor (3-3); the first screw shaft (3-2) is rotatably arranged in the first conveying cylinder (3-1), the first motor (3-3) is connected with the first screw shaft (3-2), a feed port of the first conveying cylinder (3-1) is connected with a discharge port of the hopper (2), and a discharge end of the first conveying cylinder (3-1) extends into a high end of the drum screen (4).
Further, the first spiral conveying mechanism (3) further comprises a top rod (3-4), a spring (3-5) and a plug (3-6); the hopper (2) is internally and fixedly provided with a supporting frame (2-2), the ejector rod (3-4) is vertically arranged and is positioned in the middle of the inside of the hopper (2), a plug column hole (2-21) is arranged in the supporting frame (2-2), the spring (3-5) and the plug column (3-6) are both arranged in the plug column hole (2-21) and are distributed up and down, the upper end of the ejector rod (3-4) extends into the plug column hole (2-21) and is fixedly connected with the lower end of the plug column (3-6), the lower end of the ejector rod (3-4) extends into a feed port of the first conveying cylinder (3-1) and is in contact fit with the first spiral shaft (3-2), and the ejector rod (3-4) is fixedly provided with a plurality of cross rods (3-7) which are distributed at intervals along the vertical direction. By adopting the structure, when the first screw shaft (3-2) rotates to work, because the lower end of the ejector rod (3-4) is in contact fit with the first screw shaft (3-2), the lower end of the ejector rod (3-4) can do up-and-down circumferential motion along with the rotation of the screw blades on the first screw shaft (3-2). When the ejector rod (3-4) moves upwards, the plug (3-6) slides upwards in the plug hole (2-21), and the spring (3-5) is continuously compressed; when the push rod (3-4) moves downwards, the spring (3-5) can release energy to extend and press the plug column (3-6) to slide downwards in the plug column hole (2-21). In the process that the ejector rod (3-4) rotates along with the first screw shaft (3-2) to do vertical periodic motion, the ejector rod (3-4) and a plurality of cross rods (3-7) on the ejector rod move vertically at the same time to stir the materials in the hopper (2) vertically, so that the problem that the materials in the hopper (2) are caked and blocked and are not easy to fall can be prevented, the materials smoothly enter the first conveying cylinder (3-1) and more time and less time can be completely avoided. The spring (3-5) is used for providing downward pressure for the ejector rod (3-4), so that the lower end of the ejector rod (3-4) is always in contact fit with the first screw shaft (3-2), and long-term reliability and stability of work are guaranteed.
Furthermore, the lower end of the ejector rod (3-4) is provided with a ball head (3-8). When the first screw shaft (3-2) rotates, the friction force between the ball head (3-8) and the first screw shaft (3-2) is small, so that the ejector rod (3-4) can be prevented from being more sensitive to follow up, and meanwhile, the mutual locking is also prevented.
Further, the sieve mesh anti-blocking mechanism (9) is further included; the sieve pore anti-blocking mechanism (9) comprises an air pipe (9-1) and air nozzles (9-2), the air pipe (9-1) is arranged between the inner wall of the outer cover (5) and the outer wall of the drum sieve (4) and is parallelly positioned above the drum sieve (4), and a row of air nozzles (9-2) are arranged on the air pipe (9-1) along the axial direction of the air pipe. One row of air nozzles (9-2) of the air pipe (9-1) blow air towards the drum screen (4), sand and stone blocked on the screen holes of the drum screen (4) can be blown off, the blocking problem of the drum screen (4) is avoided, and meanwhile, the cleaning is carried out in a non-contact mode, so that the friction loss of the drum screen (4) can be avoided. And when the rotary screen rotates, the row of air nozzles (9-2) of the air pipe (9-1) can realize circumferential cleaning of the rotary screen without stopping the rotary screen.
Furthermore, the sieve pore anti-blocking mechanism (9) also comprises a reciprocating driving component (9-3); the reciprocating driving component (9-3) is used for driving the air pipe (9-1) to do reciprocating motion parallel to the axial direction of the drum screen (4). When the reciprocating driving assembly (9-3) drives the air pipe (9-1) and the row of air nozzles (9-2) to reciprocate along the axial direction of the drum screen (4), the circumferential direction of the drum screen (4) and the axial direction of the drum screen (4) can be cleaned simultaneously in a reciprocating manner, so that a cleaning blind area caused to the drum screen (4) due to the spaced distribution of the air nozzles (9-2) is overcome.
Preferably, the second screw conveying mechanism (7) comprises a second screw shaft (7-1) and a second motor (7-2); the outer cover (5) is provided with an upper half cylinder part (501), a middle bucket part (502) and a lower half cylinder part (503) which are arranged in sequence; the inner diameter of the upper half cylinder part (501) is larger than the outer diameter of the rotary screen (4); the inner diameter of the lower half cylinder part (503) is smaller than that of the upper half cylinder part (501); the second screw shaft (7-1) is concentrically arranged with the lower half cylinder part (503), and the second motor (7-2) is connected with the second screw shaft (7-1).
The invention has at least the following beneficial effects:
firstly, the first spiral conveying mechanism is arranged between the hopper and the rotary screen and used for conveying materials in the hopper into the high end of the rotary screen, and the materials in the hopper are conveyed into the high end of the rotary screen in a quantitative and uniform manner, so that the problems that the screening is insufficient due to excessive sand falling into the rotary screen, and further, part of fine sand falls out from the lower end of the rotary screen and falls out from a coarse material outlet, and the screening is insufficient, so that the materials are wasted or secondary screening is needed can be solved; meanwhile, the problems of low production efficiency and high energy consumption cost caused by insufficient sieving capacity due to too little sand falling into the drum sieve are avoided;
secondly, the second spiral conveying mechanism is arranged between the inner wall of the outer cover and the outer wall of the rotary screen and is positioned below the rotary screen, the second spiral conveying mechanism can realize that fine materials screened out by the rotary screen are quantitatively and uniformly conveyed into the fine material outlet, the problem of accumulation cannot occur in the outer cover, and meanwhile, the belt conveying mechanism conveys the fine materials quantitatively and uniformly discharged from the fine material outlet into a fine material bin or a stirring station;
thirdly, the first spiral conveying mechanism and the second spiral conveying mechanism simultaneously carry out quantitative and uniform conveying work, so that the feeding, screening, discharging, conveying and other rhythms of the drum screen are ensured to be consistent, and the whole production efficiency is improved;
fourthly, when the first screw shaft rotates and conveys, because the lower end of the ejector rod is in contact fit with the first screw shaft, the lower end of the ejector rod can do vertical circumferential motion along with the rotation of the spiral blade on the first screw shaft, the ejector rod and a plurality of cross rods on the ejector rod move vertically simultaneously to stir the materials in the hopper up and down, so that the problem that the materials in the hopper are caked and blocked and are not easy to fall can be prevented, meanwhile, the materials can smoothly enter the first conveying cylinder, and more time and less time can be completely avoided; in addition, the spring is used for providing downward pressure for the ejector rod, so that the lower end of the ejector rod is always in contact fit with the first screw shaft, and long-term reliability and stability of work are guaranteed.
Fifth, the lower end of the ejector rod is provided with the ball head, so that when the first screw shaft rotates, the friction force between the ball head and the first screw shaft is small, the ejector rod can be prevented from being more sensitive to follow up, and meanwhile, the ejector rod is prevented from being mutually clamped;
sixth, the screen hole anti-blocking mechanism blows air towards the drum screen through the row of air nozzles of the air pipe, sand and stones blocked on screen holes of the drum screen can be blown off, the blocking problem of the drum screen is avoided, and meanwhile, the friction loss of the drum screen can be avoided by adopting non-contact cleaning. When the drum screen rotates, the row of air nozzles of the air pipe can realize circumferential cleaning of the drum screen, and meanwhile, the machine does not need to be stopped;
seventh, the sieve pore anti-blocking mechanism can drive the air pipe and the row of air nozzles to reciprocate along the axial direction of the drum sieve through the reciprocating driving component, and can realize simultaneous cleaning of the circumferential direction and the axial direction of the drum sieve, so as to overcome the cleaning blind area of the drum sieve caused by the spaced distribution of the air nozzles.
Drawings
Fig. 1 is a front view of the present invention.
Fig. 2 is a sectional view taken along line a-a in fig. 1.
Fig. 3 is an enlarged view at B in fig. 1.
Fig. 4 is an enlarged view at C in fig. 1.
Fig. 5 is an enlarged view at D in fig. 1.
FIG. 6 is a schematic structural view of the reciprocating drive assembly.
Detailed Description
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
example (b): referring to fig. 1-6, a sand screening and conveying integrated machine comprises a frame 1, a hopper 2, a first spiral conveying mechanism 3, a rotary screen 4, an outer cover 5, a main motor 6, a second spiral conveying mechanism 7, a belt conveying mechanism 8 and a sieve pore anti-blocking mechanism 9
The hopper 2 is fixedly arranged on the frame 1.
The drum screen 4 is rotatably arranged on the frame 1 and is obliquely arranged, and the main motor 6 is used for driving the drum screen 4 to rotate.
Specifically, a main shaft 4-1 and a radial rod 4-2 are arranged in the drum screen 4, an output shaft of the main motor 6 is connected with one end of the main shaft 4-1, and screen holes are formed in the side wall of the drum screen 4.
The first screw conveyor 3 is arranged between the hopper 2 and the trommel 4 and is used for conveying the material in the hopper 2 to the high end of the trommel 4.
In the present embodiment, the first screw conveying mechanism 3 includes a first conveying cylinder 3-1, a first screw shaft 3-2, a first motor 3-3, a ram 3-4, a spring 3-5, and a plug 3-6.
The first screw shaft 3-2 is rotatably arranged in a first conveying cylinder 3-1, the first conveying cylinder 3-1 is obliquely arranged and is parallel to the rotary screen 4, the first motor 3-3 is connected with the first screw shaft 3-2, a feed inlet is arranged in the middle of the first conveying cylinder 3-1 and is connected with a discharge outlet on the lower end of the hopper 2, and a discharge outlet is arranged at the lower end of the first conveying cylinder 3-1 and extends into the high end of the rotary screen 4.
A supporting frame 2-2 is fixedly arranged in the upper part of the hopper 2, the ejector rod 3-4 is vertically arranged and is positioned in the middle part in the hopper 2, and a plug hole 2-21 is arranged in the supporting frame 2-2.
Referring to fig. 1, 3 and 4, in the present embodiment, the supporting frame 2-2 comprises a central shaft portion 2-22 and a plurality of radial rod portions 2-23, each of said radial rod portions 2-23 being circumferentially distributed along the central shaft portion 2-22, the outer ends of the radial rod portions 2-23 being fixedly connected to the inner wall of the hopper 2. The plug bore 2-21 is arranged in the radial rod part 2-23 and is arranged vertically.
Referring to fig. 1, 3 and 4, wherein the spring 3-5 and the plug 3-6 are installed in the plug hole 2-21 and distributed up and down, the upper end of the spring 3-5 is connected with the inner top surface of the plug hole 2-21, the lower end of the spring 3-5 is connected with the upper end of the plug 3-6, the inner bottom surface of the plug hole 2-21 is provided with a down-through ejector rod hole 2-24, the inner diameter of the ejector rod hole 2-24 is smaller than the inner diameter of the plug hole 2-21, the plug 3-6 is in clearance fit with the plug hole 2-21, the plug 3-6 is limited in the plug hole 2-21 to slide up and down, the ejector rod 3-4 is in clearance fit with the ejector rod hole 2-24, the upper end of the ejector rod 3-4 is fixed with the lower end of the plug 3-6 after extending into the plug hole 2-21, the lower end of the ejector rod 3-4 extends into the feed inlet of the first conveying cylinder 3-1 and is in contact fit with the first screw shaft 3-2, and a plurality of cross rods 3-7 which are distributed at intervals along the vertical direction are fixedly arranged on the ejector rod 3-4. When the first screw shaft 3-2 rotates to work, the lower end of the ejector rod 3-4 can do up-and-down circumferential motion along with the rotation of the spiral blades on the first screw shaft 3-2 because the lower end of the ejector rod 3-4 is in contact fit with the first screw shaft 3-2. When the ejector rod 3-4 moves upwards, the plug 3-6 slides upwards in the plug hole 2-21, and the spring 3-5 is continuously compressed; when the push rod 3-4 moves downwards, the spring 3-5 can expand and press the plug 3-6 to slide downwards in the plug hole 2-21. In the process that the top rod 3-4 does up-and-down periodic motion along with the rotation of the first screw shaft 3-2, the top rod 3-4 and the plurality of cross rods 3-7 on the top rod move up and down simultaneously to stir the materials in the hopper 2 up and down, so that the problem that the materials in the hopper 2 are caked, blocked and not easy to fall down can be prevented, the materials can smoothly enter the first conveying cylinder 3-1, and more time and less time can be completely avoided. The spring 3-5 is used for providing downward pressure for the ejector rod 3-4, so that the lower end of the ejector rod 3-4 is always in contact fit with the first screw shaft 3-2, and long-term reliability and stability of work are guaranteed.
Referring to fig. 1, 3 and 4, further, the lower end of the top rod 3-4 is provided with a ball head 3-8. When the first screw shaft 3-2 rotates, the friction between the ball head 3-8 and the first screw shaft 3-2 is small, so that the follow-up of the ejector rod 3-4 can be avoided to be more sensitive, and the mutual locking can be prevented.
The outer cover 5 is sleeved on the rotary screen 4 and arranged at intervals, and a coarse material outlet 5-1 and a fine material outlet 5-2 are arranged on the outer cover 5.
In particular, the coarse material outlet 5-1 is located below the axially outer side of the lower opening of the drum screen 4.
Specifically, the fines outlet 5-2 is located below the radially outward side of the lower opening of the trommel screen 4.
The second spiral conveying mechanism 7 is arranged between the inner wall of the outer cover 5 and the outer wall of the drum screen 4 and is positioned below the drum screen 4, and the second spiral conveying mechanism 7 is used for conveying fine materials screened out by the drum screen 4 into the fine material outlet 5-2.
Referring to fig. 1 and 2, preferably, the second screw conveying mechanism 7 includes a second screw shaft 7-1 and a second motor 7-2; the housing 5 has an upper half cylinder part 501, an intermediate bucket part 502, and a lower half cylinder part 503 provided in this order; the inner diameter of the upper half cylinder 501 is larger than the outer diameter of the drum screen 4 to form a space; the lower half cylinder part 503 has an inner diameter smaller than that of the upper half cylinder part 501; the second screw shaft 7-1 is concentrically arranged with the lower half cylinder part 503, and the second motor 7-2 is connected with the second screw shaft 7-1. The fine sand sieved in the rotary screen 4 firstly falls into the middle hopper part 502, then falls into the lower semi-cylinder part 503, is scraped by the second screw shaft 7-1 in rotary motion and is conveyed into the fine material outlet 5-2.
The belt conveyor 8 is arranged below the housing 5 and is used for conveying the fine material discharged from the fine material outlet 5-2.
When the rotary screen screening machine works, the material sand to be screened is filled in the hopper 2, the material in the hopper 2 is conveyed into the high end of the rotary screen 4 through the first spiral conveying mechanism 3, the main motor 6 drives the rotary screen 4 to rotate, and the material in the rotary screen 4 simultaneously rotates and axially moves downwards due to the inclined arrangement of the rotary screen 4; wherein the fine material part is screened by the rotary screen 4 and falls into the outer cover 5, and then is sent into the fine material outlet 5-2 by the second spiral conveying mechanism 7, and then the belt conveying mechanism 8 conveys the fine material discharged from the fine material outlet 5-2 into a fine material bin or a stirring station; the coarse material portion which fails to pass through the screen rolls out from the lower end of the trommel screen 4, falls into the housing 5 and falls out from the coarse material outlet 5-1.
When the rotary screen device works, the first spiral conveying mechanism 3 is arranged between the hopper 2 and the rotary screen 4 and is used for conveying materials in the hopper 2 into the high end of the rotary screen 4, and the materials in the hopper 2 are quantitatively conveyed into the high end of the rotary screen 4 at a constant speed, so that the problems that the screening is insufficient due to excessive sand falls into the rotary screen 4, and further, part of fine sand falls out of the lower end cylinder opening of the rotary screen 4 and falls out of the coarse material outlet 5-1, and the screening is insufficient, so that the materials are wasted or secondary screening is needed can be solved; meanwhile, the problems of low production efficiency and high energy consumption cost caused by insufficient screening capacity due to too little sand falling into the drum screen 4 are avoided;
when the rotary screen type material conveying device works, the second spiral conveying mechanism 7 is arranged between the inner wall of the outer cover 5 and the outer wall of the rotary screen 4 and is positioned below the rotary screen 4, the second spiral conveying mechanism 7 can realize that fine materials sieved out by the rotary screen 4 are conveyed into the fine material outlet 5-2 at a constant speed in a fixed amount, the problem of accumulation cannot occur in the outer cover 5, and meanwhile, the belt conveying mechanism 8 conveys the fine materials which are quantitatively and uniformly discharged from the fine material outlet 5-2 into a fine material bin or a stirring station;
when the rotary screen feeding and screening device works, the first spiral conveying mechanism 3 and the second spiral conveying mechanism 7 simultaneously carry out quantitative and uniform conveying work, so that the feeding, screening, discharging, conveying and other rhythms of the rotary screen are ensured to be consistent, and the whole production efficiency is improved.
Referring to fig. 5-6, the sieve pore anti-blocking mechanism 9 comprises an air pipe 9-1, an air nozzle 9-2 and a reciprocating driving assembly 9-3, wherein the air pipe 9-1 is arranged between the inner wall of the outer cover 5 and the outer wall of the drum screen 4 and is positioned above the drum screen 4 in parallel, and the air pipe 9-1 is provided with a row of air nozzles 9-2 along the axial direction thereof. Therefore, the row of air nozzles 9-2 of the air pipe 9-1 blows air towards the drum screen 4, sand and stones blocked on screen holes of the drum screen 4 can be blown off, the blocking problem of the drum screen 4 is avoided, and meanwhile, the friction loss of the drum screen 4 can be avoided by cleaning in a non-contact mode. And when the rotary screen rotates, the row of air nozzles 9-2 of the air pipe 9-1 can realize circumferential cleaning of the rotary screen without stopping the machine.
Wherein, the air pipe 9-1 is connected with an air pump pipeline through a valve.
See fig. 5-6, wherein the reciprocating drive assembly 9-3 is adapted to drive the air tube 9-1 in a reciprocating motion parallel to the axial direction of the trommel 4. When the reciprocating driving component 9-3 drives the air pipe 9-1 and the row of air nozzles 9-2 to reciprocate along the axial direction parallel to the rotary screen 4, the circumferential direction of the rotary screen 4 and the axial direction of the rotary screen 4 can be cleaned simultaneously in a reciprocating way, so that a cleaning blind area caused to the rotary screen 4 due to the spaced distribution of the air nozzles 9-2 is overcome.
Referring to fig. 5-6, preferably, the reciprocating driving assembly 9-3 includes a third motor 9-31, a rotation shaft 9-32, a crank link 9-33, a crank shaft 9-34, a movable plate 9-35, a left support block 9-36, a left guide rod 9-37, a right support block 9-38, a right guide rod 9-39, a left air pipe mounting block 9-40 and a right air pipe mounting block 9-41; the third motor 9-31 is fixed on the outer cover 5, the left supporting block 9-36 and the right supporting block 9-38 are fixed on the inner wall of the outer cover 5 and distributed at intervals left and right, the left guide rod 9-37 is arranged in parallel with the air pipe 9-1 and is in sliding fit with the left supporting block 9-36, the right guide rod 9-39 is arranged in parallel with the air pipe 9-1 and is in sliding fit with the right supporting block 9-38, the movable plate 9-35 is provided with a strip-shaped hole 9-351, the length direction of the strip-shaped hole 9-351 is vertical to the air pipe 9-1 (namely the axial central line direction of the left guide rod 9-37 or the right guide rod 9-39, the rotating shaft 9-32 is coaxially connected with the output shaft of the third motor 9-31, the crank shaft 9-34 is parallel with the rotating shaft 9-32 and is distributed at intervals, the crank shaft 9-34 can be in sliding, one end of the crank connecting rod 9-33 is fixedly connected with the rotating shaft 9-32, the other end of the crank connecting rod 9-33 is fixedly connected with the crank shaft 9-34, the right end of the left guide rod 9-37 is fixedly connected with the left end of the movable plate 9-35, the left end of the right guide rod 9-39 is fixedly connected with the right end of the movable plate 9-35, the left air pipe mounting block 9-40 is fixed on the left end of the left guide rod 9-37, the right air pipe mounting block 9-41 is fixed on the right end of the right guide rod 9-39, and the air pipe 9-1 is fixed on the left air pipe mounting block 9-40 and the right air pipe mounting block 9-.
Preferably, the left guide rods 9-37 have two; the right guide bar 9-39 has two.
When in use, the third motor 9-31 drives the rotating shaft 9-32 to rotate, the rotating shaft 9-32 drives the crank shaft 9-34 to move through the crank connecting rod 9-33, the crank shafts 9-34 are rotated around the center of the rotation shaft 9-32 with a certain radius, the crank shafts 9-34 can be slidably matched with the strip-shaped holes 9-351 on the movable plates 9-35, so that the movable plates 9-35 can periodically reciprocate along the direction parallel to the central line of the air pipe 9-1 (namely the axial direction of the left guide rod or the right guide rod or the rotary screen 4), the air pipe 9-1 is fixed on the air pipe left mounting block 9-40 and the air pipe right mounting block 9-41, the air pipe 9-1 is periodically reciprocated along the direction parallel to the axis of the drum screen 4 with the movable plate 9-35.
Because the reciprocating driving component 9-3 drives the air pipe 9-1 and the row of air nozzles 9-2 to reciprocate along the axial direction parallel to the rotary screen 4, the circumferential direction of the rotary screen 4 and the axial direction of the rotary screen 4 can be cleaned simultaneously in a reciprocating way, so that a cleaning blind area caused to the rotary screen 4 due to the spaced distribution of the air nozzles 9-2 is overcome.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (7)
1. The utility model provides a grit screening carries all-in-one which characterized in that: comprises a frame (1), a hopper (2), a first spiral conveying mechanism (3), a drum screen (4), an outer cover (5), a main motor (6), a second spiral conveying mechanism (7) and a belt conveying mechanism (8);
the hopper (2) is fixedly arranged on the frame (1);
the rotary screen (4) is rotatably arranged on the frame (1) and is obliquely arranged, and the main motor (6) is used for driving the rotary screen (4) to rotate;
the first spiral conveying mechanism (3) is arranged between the hopper (2) and the rotary screen (4) and is used for conveying the materials in the hopper (2) into the high end of the rotary screen (4);
the outer cover (5) is sleeved on the rotary screen (4) and arranged at intervals, and a coarse material outlet (5-1) and a fine material outlet (5-2) are arranged on the outer cover (5);
the second spiral conveying mechanism (7) is arranged between the inner wall of the outer cover (5) and the outer wall of the rotary screen (4) and is positioned below the rotary screen (4), and the second spiral conveying mechanism (7) is used for conveying fine materials screened out by the rotary screen (4) into the fine material outlet (5-2);
the belt conveying mechanism (8) is arranged below the outer cover (5) and is used for conveying the fine materials discharged from the fine material outlet (5-2).
2. The sand screening and conveying all-in-one machine as claimed in claim 1, wherein: the first screw conveying mechanism (3) comprises a first conveying cylinder (3-1), a first screw shaft (3-2) and a first motor (3-3); the first screw shaft (3-2) is rotatably arranged in the first conveying cylinder (3-1), the first motor (3-3) is connected with the first screw shaft (3-2), a feed port of the first conveying cylinder (3-1) is connected with a discharge port of the hopper (2), and a discharge end of the first conveying cylinder (3-1) extends into a high end of the drum screen (4).
3. The sand screening and conveying all-in-one machine as claimed in claim 2, wherein: the first spiral conveying mechanism (3) further comprises a top rod (3-4), a spring (3-5) and a plug (3-6);
the hopper (2) is internally and fixedly provided with a supporting frame (2-2), the ejector rod (3-4) is vertically arranged and is positioned in the middle of the inside of the hopper (2), a plug column hole (2-21) is arranged in the supporting frame (2-2), the spring (3-5) and the plug column (3-6) are both arranged in the plug column hole (2-21) and are distributed up and down, the upper end of the ejector rod (3-4) extends into the plug column hole (2-21) and is fixedly connected with the lower end of the plug column (3-6), the lower end of the ejector rod (3-4) extends into a feed port of the first conveying cylinder (3-1) and is in contact fit with the first spiral shaft (3-2), and the ejector rod (3-4) is fixedly provided with a plurality of cross rods (3-7) which are distributed at intervals along the vertical direction.
4. The sand screening and conveying all-in-one machine as claimed in claim 3, wherein: the lower end of the ejector rod (3-4) is provided with a ball head (3-8).
5. The sand screening and conveying all-in-one machine as claimed in claim 4, wherein: also comprises a sieve pore anti-blocking mechanism (9);
the sieve pore anti-blocking mechanism (9) comprises an air pipe (9-1) and air nozzles (9-2), the air pipe (9-1) is arranged between the inner wall of the outer cover (5) and the outer wall of the drum sieve (4) and is parallelly positioned above the drum sieve (4), and a row of air nozzles (9-2) are arranged on the air pipe (9-1) along the axial direction of the air pipe.
6. The sand screening and conveying all-in-one machine as claimed in claim 5, wherein: the sieve pore anti-blocking mechanism (9) also comprises a reciprocating driving component (9-3); the reciprocating driving component (9-3) is used for driving the air pipe (9-1) to do reciprocating motion parallel to the axial direction of the drum screen (4).
7. An integrated sand and gravel screening and conveying machine as claimed in any one of claims 1 to 6, wherein: the second screw conveying mechanism (7) comprises a second screw shaft (7-1) and a second motor (7-2);
the outer cover (5) is provided with an upper half cylinder part (501), a middle bucket part (502) and a lower half cylinder part (503) which are arranged in sequence; the inner diameter of the upper half cylinder part (501) is larger than the outer diameter of the rotary screen (4); the inner diameter of the lower half cylinder part (503) is smaller than that of the upper half cylinder part (501); the second screw shaft (7-1) is concentrically arranged with the lower half cylinder part (503), and the second motor (7-2) is connected with the second screw shaft (7-1).
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| CN114289308A (en) * | 2021-11-30 | 2022-04-08 | 浙江大经住工科技有限公司 | Concrete grit separating centrifuge |
| CN114769112A (en) * | 2022-03-31 | 2022-07-22 | 安徽省中畅生态工程建设有限公司 | Environment-friendly energy-saving type bridge construction sand filtering machine |
| CN114870943A (en) * | 2022-01-25 | 2022-08-09 | 郑敏 | Ash treatment equipment and rubbish integrated processing system behind garbage power generation |
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