CN104556762A - Tower-type machine-made sand preparation and grading adjustment system - Google Patents

Abstract

The invention provides a tower-type machine-made sand preparation and grading adjustment system which comprises a bucket elevator, a vibratory feeder, a shaping sand maker, a dynamic powder selector, a static powder selector, a mechanical vibration screen, a return belt, a mix humidifier, a finished product belt, a dust collecting system, a system draught fan and a central control unit, wherein the bucket elevator elevates large-particle-size stone to be treated into the sand maker to perform crushing; the crushed material enters the dynamic and static powder selectors through the vibratory feeder; the powder enters the dust collecting system; the fine material enters the mix humidifier as a final finished product material; the coarse material is returned, crushed and shaped or enters the mechanical vibration screen according to different proportions; the oversize material of the vibration screen is returned, crushed and shaped, so that the obtained machine-made sand product is repeatedly shaped and crushed; and the undersize material is returned, crushed and shaped or enters the mix humidifier according to different proportions as the final finished product material.

Description

Tower machine-made sand preparation and gradation adjustment system

technical field

The invention relates to a machine-made sand preparation system, in particular to a tower-type machine-made sand preparation and gradation adjustment system.

Background technique

With the current vigorous development of urban and rural construction, the sand and gravel materials used in building construction are increasing day by day, and the natural sand and gravel resources in some areas are almost exhausted. In order to protect river dikes and dams and maintain ecological balance, local governments stipulate that some rivers are strictly prohibited and limited in mining. Actively promoting the use of machine-made sand has become the main direction of development and the main body of the industry in the transformation and upgrading of the industrial structure.

At present, domestic sand making equipment mostly uses rod mills, impact sand making machines, and impact sand making machines. Among the above-mentioned sand making equipment, the reshaped sand making machine often has over-grinding phenomenon, resulting in poor grading and a lot of powder in the finished machine-made sand, while the well-graded sand making equipment often has insufficient reshaping ability, resulting in poor shape of the finished sand. .

However, the various screening equipment currently used in the industry have low screening efficiency and poor screening effect on fine powder materials. At the same time, it is difficult to control dust. The powder content of finished sand often exceeds the national standard in the production process. In the past, wet methods were used. Powder removal consumes a lot of energy and easily causes environmental pollution.

In view of the above reasons, it is an urgent problem to be solved in this industry to provide a machine-made sand preparation and gradation adjustment system with good particle shape, excellent gradation and high output.

Contents of the invention

The invention provides a combined gradation adjustment sand making equipment that can ensure a good shaping effect, and you can adjust the gradation of sand mold particles according to your needs.

The invention provides a dry-process tower-type machine-made sand preparation and gradation adjustment system, including a hoist, a shaping sand making machine, a static powder separator, a dynamic powder separator, a vibrating screen, a hybrid humidifier, a dust collection system, and a system The induced draft fan, the central controller, and the materials crushed and shaped by the shaping sand making machine pass through the static powder separator, dynamic powder separator and vibrating screen to adjust the gradation of the machine-made sand.

Preferably, 20%-80% of the coarse material screened by the static powder separator of the present invention is returned to the cage for crushing and shaping according to product requirements, and the rest of the material enters the vibrating screen for screening.

As preferably, there is a flap gate between the static powder separator and the vibrating screen, and the flap gate selects the return, crushing and shaping of the material according to the grain type of the machine-made sand product at the discharge port of the static powder separator or enters the vibrating screen to sieve.

As preferred, the fine material and powder screened by the static powder separator in the present invention enter the dynamic powder separator, and after being screened by the dynamic powder separator, the fine material enters the mixing humidifier and is output as a finished product, and the powder enters the powder through the dust collection system. Silo.

As a preference, the material on the screen screened by the vibrating screen of the present invention is returned to the shaping sand making machine for returning, crushing and shaping, and 30-70% of the material under the screen is controlled to return to the shaping sand making machine for returning and crushing according to different gradation requirements. Shaping, the rest of the material enters the mixing humidifier and is output as finished material.

Preferably, there is a flap gate between the vibrating screen of the present invention and the mixing humidifier, and the flap gate controls the return, crushing and shaping of the under-screen material of the vibrating screen according to the particle gradation of the machine-made sand product or enters the mixing humidifier as finished material output.

Preferably, the elevator of the present invention is a bucket elevator, and a vibrating feeder is arranged between the bucket elevator and the shaping sand making machine, and the vibrating feeder evenly supplies the materials lifted by the bucket elevator to the shaping sand making machine. machine.

As a preference, the hoist, shaping sand making machine, static powder separator, dynamic powder separator, vibrating screen, hybrid humidifier, dust collection system, and system induced draft fan of the present invention adopt a tower layout design from top to bottom.

Preferably, the static powder separator of the present invention is located on the same platform as the dynamic powder separator, dust suction system, and system induced draft fan.

Preferably, the materials between the components of the present invention are conveyed by a transmission belt, and the dust collection system is provided with a dust suction pipe around the transmission belt.

The dry-process tower-type machine-made sand preparation and gradation adjustment system of the present invention adopts a tower design, occupies a small area, and has a high degree of integration; adopts a static powder separator, a dynamic powder separator combined with a vibrating screen to realize adjustable gradation of the machine-made sand The range is enlarged; dust collection equipment is used to connect the main equipment and main contacts to the system fan, so that the system is in a micro-negative pressure state, effectively controlling system dust and fugitive emissions, and the system is controllable and environmentally friendly. The invention provides a machine-made sand preparation and gradation adjustment system capable of achieving good grain shape, excellent gradation and high output, and solves the urgent problems in the industry.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Wherein, the reference signs are explained as follows:

1. Bucket elevator 2. Vibrating feeder 3. Shaping sand making machine 4. Belt conveyor 5. V-type static powder separator 6. Dynamic powder separator 7. Dust collection system 8. System induced fan 9. Turning plate Gate 10, mechanical vibrating screen 11, flap gate 12, return belt 13, finished product belt 14, mixing humidifier 15, powder bin 16, intermediate bin 17, return belt

Detailed ways

A specific embodiment of the present invention will be described below with reference to FIG. 1 .

The tower-type machine-made sand preparation and gradation adjustment system of the present invention mainly includes a hoist 1, a vibrating feeder 2, a shaping sand making machine 3, a static powder separator 5, a dynamic powder separator 6, a dust collection system 7, and a system Induced fan 8, control flap gate 9,11, mechanical vibrating screen 10, belt conveyor 4,12,13, mixing humidifier 14, central controller (not shown on the figure) and other components. The materials crushed and shaped by the shaping sand making machine 3 pass through the static powder separator 5 and the dynamic powder separator 6 combined with the mechanical vibrating screen 10 to adjust the gradation of the machine-made sand.

The mechanical vibrating screen 10 is located at the lower part of the static powder separator 5, and a flap gate 9 can be set between the static powder separator 5 and the mechanical vibrating screen 10.

The entire system of the present invention is designed in a tower arrangement from top to bottom, thereby realizing the advantages of small footprint and high use efficiency. Elevator 1 lifts the large-sized stones to be processed to the top of the system, and transports them to the shaping sand making machine 3 through the vibrating feeder 2 for crushing. Shaping sand making machine 3 is located at the bottom of the vibrating feeder. The vibrating feeder 2 can evenly transport the materials lifted by the elevator 1 to the shaping sand making machine, so as to avoid the impact of concentrated materials on the shaping sand making machine. The static powder separator 5 is located at the lower part of the shaping sand making machine 3, and the material between the static powder separator 5 and the shaping sand making machine 3 is transported by the belt conveyor 4, and the crushed material enters the static powder separator 5 through the belt conveyor 4 , the static powder separator 5 in the present embodiment is a V-type static powder separator, and the V-shaped angle and the air volume of the V-type static powder separator 5 are controlled to enter the dynamic powder separator 6 by the V-type static powder separator 5. Feed. The powder and smaller fine materials that enter the dynamic separator 6, the powder enters the dust collection system 7 through the dynamic separator 6, and the dust collection system 7 is connected with the powder bin 15 to store the powder. Static powder separator 5, dynamic powder separator 6, dust collection system 7 and system induced draft fan 8 can be located on the same platform. The fine material entering the dynamic powder separator 6 is separated by the dynamic powder separator and enters the mixing humidifier 14, and after being mixed, it becomes a finished product and is output. The vibrating screen 10 is located at the lower part of the static powder separator 5, and the large-grained materials separated by the V-type static powder separator 5 are controlled by the flap gate 9 according to different proportions and enter the shaping sand making machine 3 for returning to the cage for crushing and shaping or enter the vibrating screen 10, and then The vibrating screen 10 performs screening, and the material on the screen with larger particles is repeatedly returned to the shaping sand making machine 3 for returning to the cage for crushing and shaping, and the under-screen material with smaller particles is controlled by the control flap gate 11 according to different proportions and enters the shaping sand making machine 3 Carry out cage crushing and shaping or enter the mixing humidifier 14 as the final product output.

In the above-mentioned embodiment of the present invention, the V-shaped static powder separator 5 has a V-shaped structure, and the material enters the V-shaped stepped plate screening area from the feeding pipe of the V-shaped structure, and the material is uniformly screened step by step through the V-shaped stepped plate. point. The air flow brings smaller particle materials and dust into the dynamic separator 6 through the fine material outlet of the V-shaped structure, while the large particle materials will be directly discharged from the V-shaped structure lower end discharge port of the V-shaped static separator 5. The angle of the V-shaped plate of the V-shaped static powder separator 5 of the present invention is adjusted electrically and controlled with air volume, so as to realize the control of particle size distribution in the final finished material. The present invention can control the maximum particle diameter entering the dynamic powder separator 6 within the range of 1-3mm by adjusting the angle of the V-shaped plate and the air volume of the V-shaped static powder separator 5 .

The dynamic powder separator of the present invention can be air separation equipment. It relies on the airflow to carry the powder into the sorting chamber, and the classification of the material is formed by the centrifugal force when the cyclone and the rotor rotate. By adjusting the rotating speed and air volume of the dynamic classifier 6, the adjustment of the particle size distribution of medium and fine sand and the proportion of powder in the finished sand can be realized. The higher the speed of the rotor, the more the finished material collected and the higher the powder content, the less powder will go with the wind; the lower the speed, the less the finished material collected and the lower the powder content. The powder that goes with the wind is relatively more.

The flap gate 9 of the present invention is arranged between the static powder separator 5 and the vibrating screen 10, and the material is mainly judged according to the particle shape of the machine-made sand product passing through the discharge port at the lower end of the discharge port of the V-type static powder separator 5 It enters the shaping sand making machine 3 for returning to the cage for crushing and shaping or enters the vibrating screen 10 for screening by the vibrating screen 10. In the present invention, by controlling the opening of the flap gate 9, 20-80% of the V-type static powder separator 5 with different proportions is returned to the plastic sand making machine 3 for return.

The flap gate 11 of the present invention is arranged between the vibrating screen 10 and the mixing humidifier 14, mainly according to the particle gradation of the machine-made sand product to determine that the under-screen material with smaller particles under the vibrating screen 10 is to enter the shaping sand making machine 3. Return to the basket for crushing and shaping or enter the mixing humidifier 14 as the final finished product output. The gradation of machine-made sand is composed of machine-made sand with different particle gradation and different fineness modulus. Therefore, it needs to be determined according to the requirements of the fineness modulus of machine-made sand and the amount of fine material collected by dynamic powder separator 6. The material under the screen of the vibrating screen 10 enters into the finished product 13 or continues to return to the cage for crushing and shaping. The present invention controls the opening of the flap gate 11 to return 30-70% of the undersize of the mechanical vibrating screen 10 in different proportions to the shaping sand making machine 3 for returning to the cage, thereby controlling the gradation of the coarse and fine sand in the finished sand.

When selecting the mechanical vibrating screen 10 of 4.75mm sieve mesh screen cloth in the above-mentioned embodiment of the present invention, can obtain fineness modulus at 2.5-3.2 grain-shaped medium, excellent machine-made sand; When the vibrating screen is 10, the fineness modulus can be obtained in 1.8-2.5 grain shape, excellent machine-made sand.

The elevator 1 of the present invention is preferably a bucket elevator 1, and the material is conveyed between the bucket elevator 1 and the shaping sand making machine 3 through a vibrating feeder 2. The material shaped by the shaping sand making machine 3 is sent to the V-type static powder separator 5 through a belt conveyor. The recycled material of the turnover gate 9, the screen material of the mechanical vibrating screen 10, and the recycled material of the turnover gate 11 can be reshaped through the return belt 12. The fine material separated by the dynamic powder classifier 6 and the finished product determined by the flap gate 11 can enter the mixing humidifier 14 through the finished product belt 13 .

The above-mentioned belt setting method is only a preferred belt setting method, and it is not used to limit the specific structure of the present invention. Those skilled in the art can set multiple belts on the basis of the disclosed embodiments of the present invention, for Each recycled material and/or finished material is conveyed. This slight change does not depart from the design concept of the present invention.

As another preferred embodiment of the present invention, the dust collection system 7 can be provided with dust suction devices at the joints of the system components respectively. Since the generation of dust in the system is generated during the transfer and transportation of materials between various devices, dust suction pipes are installed at the joints of each component to connect to the system fan, so that the system is in a state of slight negative pressure, effectively controlling the dust in the system. Emissions are organized, and the system is controllable and environmentally friendly.

As another better embodiment of the present invention, dust suction ducts are set around parts such as vibrating feeder 2, mechanical vibrating screen 10, return material belt 12, finished product belt 13 and belt conveyor 4, return material belt 17, and dust suction The pipeline communicates with the dust suction system 7, thereby minimizing the dust raised by the equipment of the present invention. The expressions in the above two implementations are only to illustrate the function and basic setting ideas of the vacuum system of this patent. The specific design scheme is not limited to the forms listed in the text of this patent and the accompanying drawings.

As another embodiment of the present invention, on the basis of the previous embodiment, an intermediate bin 16 can also be provided, and the intermediate bin 16 can be arranged below the output port of the return belt 12, and is used for accommodating materials that need to be returned to the cage for crushing and reshaping. Recycling material. As a further improvement of this embodiment, a return belt 17 may also be provided at the outlet of the intermediate bin 16 for transporting the recycled materials to the bucket elevator 1 .

The dust collection system 7 of the present invention cooperates with the system fan 8, and the system fan 8 provides the wind force for separating the powder and fine materials of the V-type static powder separator 5 and the dynamic powder separator 6.

Compared with the existing machine-made sand preparation technology, the tower-type machine-made sand tower-type preparation and gradation adjustment system of the present invention has a large sand-making capacity of a single device, and can conveniently adjust the fineness gradation of sand-making; it adopts a vertical tower design, It occupies a small area, and the fully enclosed connection method effectively solves environmental problems such as dust and material leakage during equipment operation. The finished machine-made sand has good grain shape and gradation can be flexibly adjusted according to needs.

The above description is for illustration only, not for limitation. Any equivalent modification or adjustment made without departing from the spirit and scope of the present invention shall be included in the protection scope of the appended claims of the present invention.

Claims (10)

1. the tower Machine-made Sand preparation of dry method and gradation adjustment system, comprise lift (1), shaping sand-making machine (3), static powder separating machine (5), dynamic powder concentrator (6), vibratory screening apparatus (10), mixing humidifier (14), dust collecting system (7), system induced draft fan (8), central controller, it is characterized in that: the material through described shaping sand-making machine (3) broken shaping carries out gradation adjustment in conjunction with described vibratory screening apparatus (10) to Machine-made Sand by described static powder separating machine (5), described dynamic powder concentrator (6).

2. the tower Machine-made Sand preparation of dry method as claimed in claim 1 and gradation adjustment system, it is characterized in that: according to product demand, 20%-80% is steam again broken shaping by the thick material after described static powder separating machine screens, rest materials enters described vibratory screening apparatus and sieves.

3. the tower Machine-made Sand preparation of dry method as claimed in claim 2 and gradation adjustment system, it is characterized in that: have panel turnover sluice gate (9) between described static powder separating machine (5) and described vibratory screening apparatus (10), described panel turnover sluice gate (9) is selected the broken shaping of the withdrawal of currency from circulation of this material or enters described vibratory screening apparatus (14) to sieve according to the Machine-made Sand product grain type of the discharge gate of described static powder separating machine (5).

4. the tower Machine-made Sand preparation of dry method as claimed in claim 1 and gradation adjustment system, it is characterized in that: the fines screened by described static powder separating machine and powder enter described dynamic powder concentrator (6), screen through described dynamic powder concentrator (6), described fines enters described mixing humidifier (14), export as finished product material, described powder enters filler bin (15) through described dust collecting system (7).

5. the tower Machine-made Sand preparation of dry method as claimed in claim 1 and gradation adjustment system, it is characterized in that: the on-the-sieve material withdrawal of currency from circulation after described vibratory screening apparatus (10) screening enters described shaping sand-making machine (3) and carries out steaming again broken shaping, undersize material is according to different gradation requirement, the control 30-70% withdrawal of currency from circulation enters described shaping sand-making machine (3) and carries out steaming again broken shaping, and rest materials enters described mixing humidifier (14) and exports as finished product material.

6. the tower Machine-made Sand preparation of dry method as claimed in claim 5 and gradation adjustment system, it is characterized in that: have panel turnover sluice gate (11) between described vibratory screening apparatus (10) and described mixing humidifier (14), described panel turnover sluice gate (11) controls the broken shaping of the withdrawal of currency from circulation of the undersize material of described vibratory screening apparatus (10) or enters described mixing humidifier (14) and export as finished product material according to the grain composition of institute's Machine-made Sand product.

7. the tower Machine-made Sand preparation of dry method as claimed in claim 1 and gradation adjustment system, it is characterized in that: described lift (1) is chapelet, be provided with oscillating feeder (2) between described chapelet (1) and described shaping sand-making machine (3), the material that described chapelet (1) promotes evenly is supplied to described shaping sand-making machine (3) by described oscillating feeder (2).

8. the tower Machine-made Sand preparation of dry method as claimed in claim 1 and gradation adjustment system, is characterized in that: described lift (1), shaping sand-making machine (3), static powder separating machine (5), dynamic powder concentrator (6), vibratory screening apparatus (10), mixing humidifier (14), dust collecting system (7), system induced draft fan (8) adopt tower layout design from top to bottom.

9. the tower Machine-made Sand preparation of dry method as claimed in claim 8 and gradation adjustment system, is characterized in that: described static powder separating machine (5) and described dynamic powder concentrator (6) and dust collecting system (7), system induced draft fan (8) are positioned at identical platform.

10. the tower Machine-made Sand preparation of dry method as claimed in claim 1 and gradation adjustment system, is characterized in that: the material between each parts adopts transmission belt transmission, and described dust collecting system (7) is provided with dust sucting pipeline at described transmission belt periphery.