CN108972896A - A kind of building station type production line that can produce sand and aggregate simultaneously - Google Patents

Abstract

The invention discloses a building-type production line capable of producing sand and aggregate at the same time. The building-type steel structure frame is equipped with dual-host crushing equipment connected with a PLC control system, secondary air separation equipment, and finished products. Sand fineness modulus control device, humidifier and dust collection equipment. The dual-main crushing equipment includes a shaping machine, a sand making machine and a vibrating screening mechanism. The two-stage powder removal can effectively control the powder content of the sand and gravel and improve the quality of the finished sand and gravel. The outlet of the secondary wind selection equipment is connected with the vibrating screening mechanism. The screening mechanism includes a vibrating screen and multiple material diversion devices, through which the materials of the production line are graded, so that sand and/or gravel can be produced at the same time, the production process can be flexible and changeable, and one machine can be used for multiple purposes, reducing equipment Investment, with good economic practicability.

Description

A floor-to-ceiling production line capable of producing sand and aggregate at the same time

technical field

The invention relates to a floor-standing production line capable of simultaneously producing sand and aggregate, and belongs to the technical field of sand-making production equipment.

Background technique

At present, in the production of sand and gravel aggregates, the layout of the traditional sand making production line includes plane layout and building station (tower) layout. Among them, the layout method has disadvantages such as large floor area, difficulty in dust removal and environmental protection, poor environmental protection effect, and requires several dust collection systems to collect dust in different areas, and large investment in environmental protection. The building station type (tower type) production system has a compact structure, a small footprint, and saves space, but its equipment configuration is single, and a single crushing main machine is used to make sand, and the shaping and crushing ratio cannot be balanced, so there are the following defects: (1) The processing capacity is low (usually Q≤100t/h in China); (2) The feed particle size requirement is high. If you want to improve the quality of the finished product, you need to take into account sand making and shaping, which leads to the inability to increase the speed and frequency of the main engine, resulting in low output and low energy consumption. High, and the feed size is required to be less than 15mm; (3) The product is single, because the feed size is too small, only sand can be produced, and aggregates (rice stone and crushed stone) cannot be produced at the same time. The production is not flexible and cannot meet customer needs. If Customers need rice stones and crushed stones, which will inevitably increase equipment (production line/system) investment; (4) The fineness modulus cannot be accurately detected and adjusted, resulting in poor quality stability of concrete; (5) The requirements for raw materials are strict and the processing capacity is weak. The proportion of stone powder contained in machine-made sand is not easy to control, and the ultra-fine powder is not easy to remove, resulting in unreasonable gradation of machine-made sand. When the raw material contains high powder or mud content, the cost of dust removal is high; (6) vibrating screen (circular vibrating screen /linear screen) has low processing capacity and low screen penetration rate. When the processing capacity is above 300t/h, it is necessary to increase the number of vibrating screens, resulting in an overly large steel structure (large footprint), and is prone to resonance, reducing the steel structure of the system Stability, increase production investment cost.

Contents of the invention

The technical problem to be solved by the present invention is to provide a floor-to-ceiling production line capable of simultaneously producing sand and aggregate, which can overcome the deficiencies of the prior art.

In order to solve the above-mentioned technical problems, the present invention is achieved through the following technical solutions: a floor-to-ceiling production line capable of simultaneously producing sand and aggregates, comprising a multi-layer vertically arranged steel structure frame, and a There are dual-host crushing equipment connected to the PLC control system, wind separation equipment with secondary settings, finished sand fineness modulus control device, humidifier and dust collection equipment. The dust collection equipment is connected with the above equipment through the dust collection pipeline. The dust outlet is connected, and the dual-host crushing equipment includes a shaping machine, a sand making machine and a vibrating screening mechanism. The outlets of the shaping machine and the sand making machine are equipped with a first-stage winnowing device, and the outlet is lifted The mechanism is connected to the No. 1 material dispersing device, and the outlet of the No. 1 material dispersing device is provided with a secondary air separation equipment, and the output port of the secondary air selection equipment is connected to the vibrating screening mechanism. The vibrating screening mechanism includes The vibrating screen and multiple material diversion devices, the fine sand outlet is provided at the bottom of the vibrating screen, the aggregate channel and the coarse sand channel connected to the corresponding material diversion device are arranged on the side, and the material diversion device connected to the aggregate channel One of the outlets is connected to the finished product warehouse, and the other is connected to the shaping machine and the sand making machine; one outlet of the material diversion device connected to the coarse sand channel is connected to the sand making machine, and the other is connected to the fine sand at the bottom of the vibrating screen. The outlets are all connected to the finished sand fineness modulus control device, and the discharge port of the finished sand fineness modulus control device is connected to the finished sand warehouse through a humidifier.

The aforementioned material splitting device is a three-way distributor adjusted by an electro-hydraulic push rod, and its number matches the number of screen layers of the vibrating screen.

The aforementioned vibrating screen is a three-axis elliptical screen.

The screen mesh of the aforementioned vibrating screen has more than three layers. From top to bottom, it is an overdiameter material layer, a finished aggregate layer, and a coarse sand layer. The bottom is a fine sand outlet, and the overdiameter material layer is connected to the shaping machine; The aggregate layer and the coarse sand layer are connected with corresponding material distribution devices.

The aforementioned large-size aggregate enters the shaping machine through the corresponding material diversion device; the small-size aggregate and coarse sand enter the sand making machine through the corresponding material diversion device.

A No. 1 buffer bin is provided at the feed port of the aforementioned shaping machine; a No. 2 buffer bin and a No. 2 material dispersing device connected thereto are provided at the feed port of the sand making machine.

The aforementioned No. 2 buffer bin is provided with an overflow port communicating with No. 1 buffer bin.

The aforementioned No. 2 material dispersing device is a frequency conversion device.

The aforementioned finished sand fineness modulus control device includes two adjustable-speed metering belt scales connected to the PLC control system, one of which is arranged below the fine sand outlet, and the other is arranged below the coarse sand outlet of the material splitting device.

The above-mentioned secondary air separation equipment is a frequency conversion powder separator that adopts positive and negative pressure methods combined with separation of stone powder content.

Compared with the prior art, the present invention discloses a building-type production line capable of simultaneously producing sand and aggregate, which is equipped with dual-host crushing equipment connected to a PLC control system, and a secondary set-up in the building-type steel structure frame. Air separation equipment, finished sand fineness modulus control device, humidifier and dust collection equipment, the dust collection equipment is connected to the dust discharge port of each of the above equipment through dust collection pipes, which set collection points for each dust raising point in the entire production system Dust point, to meet environmental protection requirements; the dual-host crushing equipment includes (shaping machine, sand making machine) and vibrating screening mechanism, and the outlets of the two main hosts are successively equipped with primary wind separation equipment and secondary wind separation equipment , two-stage powder removal can effectively control the powder content of the sand and gravel, and improve the quality of the finished sand and gravel. The outlet of the secondary winnowing equipment is connected with the vibrating screening mechanism. A material splitting device, with a fine sand outlet at the bottom of the vibrating screen, an aggregate channel and a coarse sand channel connected to the corresponding material splitting device at the side, and a discharge of the material splitting device connected to the aggregate channel One port is connected to the finished product warehouse, and the other is connected to the shaping machine and sand making machine. When the finished aggregate is needed, adjust the corresponding material diversion device so that all or most of the finished aggregate is transported into the finished aggregate bin by the corresponding finished belt. , when there is no need to produce finished aggregate, then adjust the material splitting device so that all of them return to the shaping machine or sand making machine for re-crushing; one outlet of the material splitting device connected to the coarse sand channel is connected to the sand making machine, and the other is connected to the sand making machine. One and the fine sand outlet at the bottom of the vibrating screen are connected to the finished sand fineness modulus control device, and the outlet of the finished sand fineness modulus control device is connected to the finished sand warehouse through a humidifier, and the finished sand fineness modulus is passed through the finished sand fineness modulus. After the digital control device is regulated, it enters the humidifier in proportion to humidify and stir, and becomes finished sand with stable fineness mode, which is transported into the finished sand silo.

The secondary winnowing equipment is a frequency-converting powder separator that uses positive and negative pressure methods combined with separation of stone powder content. It has a compact structure, a small footprint, low production costs, high powder removal efficiency, low energy consumption, and high powder selection stability. It is economical and practical, and it is equipped with a fan with variable frequency control of wind speed and air volume. The fan can be adjusted by frequency conversion according to the stone powder content of the finished sand, so that the content of the finished sand stone powder can be adjusted and controlled.

The feed port of the shaping machine is equipped with a No. 1 buffer bin, and the feed port of the sand making machine is equipped with a No. 2 buffer bin and a frequency-variable No. 2 material dispersing device, which can prevent the overload of the two hosts from causing excessive current. , to ensure the stability and safety of the sand making, and the No. 2 buffer bin is provided with an overflow port connected with the No. 1 buffer bin. When the material in the No. 2 buffer bin accumulates too much, the material can flow It flows into the No. 1 buffer bin for crushing to achieve material balance in the production line; through the No. 2 material dispersing device, the material enters the sand making machine evenly to ensure a stable current of the sand making machine and maximize the efficiency of crushing and sand making.

The present invention has following beneficial effects:

(1) The requirements for raw materials are low, and the combination of double-speed and double-frequency crushing machine is adopted. The feed particle size (about 60mm) is much higher than that of ordinary sand making stations (about 15mm); in addition, The wind separation equipment with two-stage setting effectively reduces the dust content requirements in raw materials, and can precisely control the powder content of finished sand and gravel, and the production quality is high.

(2) Relatively low energy consumption, energy saving and environmental protection, the crushing ratio of the two hosts is adjusted through the PLC control system, and the material distribution device of the production line is adjusted to ensure the balance of material grading in the production line, so that each host can run at full capacity according to the actual production capacity, avoiding It solves the problem of insufficient feeding amount of each main machine and avoids waste of energy consumption.

(3) The production capacity is large, and the double-speed and double-frequency crushing main engine is used to crush and make sand at the same time, and the three-axis elliptical screen is used for screening, so that the processing capacity of a single building station can reach ≥300t/h.

(4) The finished sand fineness modulus control device is used for regulation, and the sand making process can flexibly meet the market demand. By adjusting different fineness moduli, coarse sand, medium sand and fine sand can be obtained, and the control precision is high, fine The stability of the degree modulus is good, thereby ensuring the stability of the concrete and improving the safety of the engineering building.

(5) Realize automatic production, high production efficiency, save time and effort, and greatly reduce the labor intensity of the staff.

(6) Only sand and/or sand and gravel can be produced at the same time, the production process can be flexible and changeable, the product quality is stable, high-quality, and one machine can be used for multiple purposes, reducing equipment investment, and has good economic practicability.

Description of drawings

Fig. 1 is a schematic flow chart of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention:

As shown in Figure 1, a floor-to-ceiling production line that can produce sand and aggregates at the same time includes a multi-layer vertical steel structure frame, and a dual-main crushing machine connected by a PLC control system is installed in the steel structure frame. equipment, secondary air separation equipment, finished sand fineness modulus control device 16, humidifier 17 and dust collection equipment 19, the dust collection equipment 19 is connected to the dust outlet of each equipment through dust collection pipes.

The dual-host crushing equipment includes a shaping machine 3, a sand making machine 4 and a vibrating screening mechanism. The shaping machine 3 is a constant-speed shaping vertical shaft crusher with overflow; the sand making machine 4 is a GSP65 type high-speed and high-frequency vertical shaft crushing machine. The vibrating screening mechanism includes a vibrating screen 11 and a plurality of material splitting devices connected thereto, specifically, the material splitting device is a three-way feeder adjusted by an electro-hydraulic push rod, and its electro-hydraulic push The rod is connected with the PLC control system to realize automatic diversion. The number of the material diversion devices corresponds to the number of layers of the vibrating screen 11. The feed port of the shaping machine 3 is connected to the No. 1 buffer bin 2 and enters from the feed device 1. The raw materials first enter the shaping machine 3 through the No. 1 buffer bin 2 for crushing and shaping.

The discharge port of the shaping machine 3 and the sand making machine is provided with a first-stage wind separation equipment 6, and the discharge port of the first-stage wind separation equipment 6 is connected to the No. 1 material dispersion device 9 through a running belt 7 and a lifting mechanism 8, The discharge port of the No. 1 material dispersing device 9 is provided with a secondary air separation equipment 10, and the secondary air separation equipment 10 is a frequency conversion type powder separator that adopts positive and negative pressure methods in combination with the separation of stone powder content. The dust exhaust port of the powder machine is connected with the dust collection device 19, which is a negative pressure air outlet. There is a corresponding positive pressure air inlet on the box of the frequency conversion powder separator, and the high pressure airflow generated by the frequency conversion fan enters through the positive pressure air inlet. Inside the winnowing machine box, the material can be blown away, and the fine particle material suspended in the box can be sucked into the dust collection device 19 from the negative pressure air outlet by the negative pressure wind generated by the dust collector, while the large particle machine-made sand can be drawn from The discharge port at the bottom of the frequency conversion powder separator achieves secondary powder removal, and the secondary air separation equipment 10 is equipped with a fan for frequency conversion to adjust the wind speed and air volume, which can be adjusted by frequency conversion according to the stone powder content requirements of the finished sand. Realize the adjustable and controllable content of finished sandstone powder.

The discharge port at the bottom of the frequency conversion type powder separator is connected to the feed port of the vibrating screen 11, the vibrating screen 11 is a three-axis elliptical sieve, and the three-axis elliptical sieve includes a sieve body, including three transmission shafts arranged in parallel, each Two exciters are respectively arranged on both sides of the root drive shaft, a total of six exciters. The speed of the three exciters is the same, including a drive motor assembly, which is connected to one of the main shafts through a belt to drive the screen box to vibrate. The screen box is installed on the support through 4 groups of damping springs at the four corners of the screen box. The excitation assembly adopts a three-axis transmission design to disperse the side plate stress and reduce the load of each bearing, so that the excitation of the three-axis elliptical screen Compared with ordinary circular vibrating screens and linear vibrating screens, the vibration force is greatly improved, and the vibration intensity is 1.5 times that of ordinary circular vibrating screens; the three-axis elliptical screen has more than three layers, the bottom of which is the fine sand outlet, and the side is from top to bottom. The bottom is the super-diameter material layer, the finished aggregate layer, and the coarse sand layer, and the bottom is the fine sand outlet, and the aggregate channel on the side of the super-diameter material layer is connected to the No. 1 buffer bin; Corresponding and connected material distribution devices are provided below, specifically, the aggregate layer can include a finished crushed stone layer and a finished rice stone layer, and the finished crushed stone layer is connected to No. 1 material distribution device 12, The finished rice stone layer is connected with the No. 2 material diversion device 13, the coarse sand layer is connected with the No. 3 material diversion device 14, and the finished crushed stone is diverted through the No. 1 material diversion device 12, and a part is stored in the No. 1 buffer bin 2. Then return to the plastic machine 3 for re-crushing, and the other part is transported into the finished gravel bin 21 through the No. 1 finished product belt 20; the finished rice stone is shunted through the No. 2 material diversion device 13, and a part is stored in the No. 2 buffer bin 15, and then returned to the sand making machine. 4. Re-crushing and making sand, and the other part is transported into the finished rice stone bin 23 through the No. 2 finished product belt 22; the coarse sand is shunted through the No. 3 material diversion device 14, and part of it is stored in the No. 2 buffer bin 15, and then returned to the sand making machine 4 for re Crushed sand, the other part and the fine sand flowing out from the bottom of the vibrating screen 11 flow into the finished sand fineness modulus control device 16, and a No. 2 material dispersing device 18 is installed at the discharge port at the bottom of the No. The No. 1 material dispersing device 18 makes the materials enter the sand making machine 4 evenly and stably. The No. 2 material dispersing device 18 is a frequency conversion design, so that the materials entering the sand making machine 4 are uniform, and the current of the high-speed and high-frequency vertical shaft sand making machine is guaranteed to be stable. Maximize the efficiency of crushing and sand making; the finished sand fineness modulus control device 16 includes two adjustable speed metering belt scales connected to the PLC control system, one of which is set under the fine sand outlet, and the other is set under the material Below the coarse sand outlet of the diverter device, the PLC control system adjusts their speed ratio according to the weights detected on the two adjustable-speed metering belt scales, and then controls the mixing ratio of coarse sand and fine sand, which can accurately control the finished sand. The fineness modulus of the finished sand fineness modulus, the discharge port of the finished sand fineness modulus control device 16 is connected with the humidifier 17, after the finished sand with a certain fineness modulus is humidified by the humidifier 17, it is discharged through the humidifier 17 The No. 3 finished product belt 24 below the feed port is transported into the finished sand silo 25, and the No. 2 buffer bin 18 is provided with an overflow port connected with the No. 1 buffer bin 2. When the No. 2 buffer bin 18 is too many and cannot When entering the sand making machine 4, it can enter the No. 1 buffer bin 2 from the overflow port, so that it enters the shaping machine 3 for re-crushing.

In conjunction with the production process on the building station production line, the technical solutions in the embodiments of the present invention are further described:

(1) Raw materials (stones or mixtures with a particle size less than 60mm) enter the shaping machine 3 for crushing and shaping;

(2) The crushed and reshaped material enters the first-level air separation equipment 6 for pre-powder removal, and is transported to the No. 1 material dispersing device 9 on the top of the building station through the transfer belt 7 and the lifting mechanism 8, which disperses the material evenly and sends it to into the secondary winnowing equipment 10 for secondary powder removal.

(3) The material that has been depowdered for the second time enters the three-axis elliptical sieve directly below the secondary air separation equipment 10 for sieving. Specifically, three-layer screen/four-layer screen configuration can be selected according to the discharge requirements. At least include the size of the bottom sieve hole of 3mm×3mm and the size of the second layer of sieve hole from bottom to top 5mm×5mm. 30mm and other types;

(4) After screening, the super-diameter material (particle size greater than 30mm) returns to the plastic machine 3 for re-crushing; for the finished aggregate (particle size 10~30mm), it can be divided into two process lines through the corresponding material diversion device. Material: When finished crushed stones are needed, adjust the No. 1 material diversion device 12 so that all or most of the finished crushed stones are transported into the finished crushed stone bin 21 by the No. 1 finished product belt 20; when the finished crushed stones are not produced, adjust the No. No. material splitting device 12, so that it all returns to the plastic machine 3 for crushing and shaping again, wherein, the production process of the finished rice stone (particle size 5~10mm/15mm) is similar to the above; corresponding to the finished sand with a certain fineness modulus, the particle size Fine sand with a particle size of 0-3mm and coarse sand with a particle size of 3mm-5mm pass through the No. 3 material diversion device 14, pass through the finished sand fineness modulus control device 16, enter the humidifier 17 in proportion to humidify and stir, and become fineness mode The stable finished sand is transported into the finished sand silo 25 by the No. 3 finished product belt 24, and the excess coarse sand is crushed and sand-made by the No. 3 material splitting device 14 and another outlet sand making machine 4.

Preferably, No. 1 buffer bin 2 is provided at the feeding port of shaping machine 3, and No. 2 buffer bin 15 and No. 2 material dispersing device 18 with variable frequency are provided at the feeding port of sand making machine 4. When high speed and high When the overload current of the sand making machine 4 with high frequency is too large, the material will be buffered in the No. The shaping machine 3 is crushed to achieve material balance in the production line; the material enters the sand making machine 4 evenly through the frequency-variable No. 2 material dispersing device 18 to ensure that the current of the sand making machine 4 is stable, and the efficiency of crushing and sand making is maximized.

Claims (10)

1. A floor-standing production line capable of simultaneously producing sand and aggregate, comprising a multi-layer vertically arranged steel structure frame, characterized in that: a dual-main crushing machine connected to a PLC control system is provided in the steel structure frame equipment, secondary air separation equipment, finished sand fineness modulus control device, humidifier and dust collection equipment. The equipment includes a shaping machine, a sand making machine and a vibrating screening mechanism. The outlet of the shaping machine and the sand making machine is equipped with a first-level winnowing equipment, and the outlet is connected to the No. 1 material dispersion device through a lifting mechanism. No. 2 material dispersing device is equipped with secondary air separation equipment at the discharge port, and the discharge port of the secondary air separation equipment is connected with the vibrating screening mechanism. The vibrating screening mechanism includes a vibrating screen and multiple material splitting devices. The bottom of the vibrating screen is provided with a fine sand outlet, and the side is provided with an aggregate channel and a coarse sand channel connected to the corresponding material diversion device, and an outlet of the material diversion device connected to the aggregate channel is connected to the finished product warehouse. The other is connected to the shaping machine and sand making machine; one outlet of the material diversion device connected to the coarse sand channel is connected to the sand making machine, and the other is connected to the fine sand outlet at the bottom of the vibrating screen to the fineness modulus of the finished sand A control device, the outlet of the finished sand fineness modulus control device is connected to the finished sand warehouse through a humidifier. 2. The floor-to-ceiling production line capable of simultaneously producing sand and aggregate according to claim 1, characterized in that: the material diversion device is a three-way distributor adjusted by an electro-hydraulic push rod, and its quantity and vibration The mesh layers of the sieve match. 3. The floor-to-ceiling production line capable of simultaneously producing sand and aggregate according to claim 2, wherein the vibrating screen is a three-axis elliptical screen. 4. The building station production line capable of simultaneously producing sand and aggregates according to claim 3, characterized in that: the screen of the vibrating screen is set at more than three layers, and from top to bottom are successively super-diameter material layers, The finished aggregate layer and the coarse sand layer have a fine sand outlet at the bottom, and the super-diameter material layer is connected to the shaping machine; the aggregate layer and the coarse sand layer are connected to the corresponding material distribution device. 5. The floor-to-ceiling production line capable of simultaneously producing sand and aggregate according to claim 4, characterized in that: the aggregate with large particle size enters the shaping machine through a corresponding material diversion device; aggregate with small particle size, coarse aggregate The sand enters the sand making machine through the corresponding material splitting device. 6. The floor-to-ceiling production line capable of simultaneously producing sand and aggregate according to claim 5, characterized in that: No. 1 buffer bin is provided at the feed port of the shaping machine; the feed of the sand making machine There is No. 2 buffer bin and No. 2 material dispersing device connected to it at the mouth. 7. The floor-to-ceiling production line capable of simultaneously producing sand and aggregates according to claim 6, characterized in that: the No. 2 buffer bin is provided with an overflow port communicating with the No. 1 buffer bin. 8. The floor-to-ceiling production line capable of simultaneously producing sand and aggregate according to claim 6, characterized in that the No. 2 material dispersing device is a frequency conversion device. 9. The floor-to-ceiling production line capable of simultaneously producing sand and aggregates according to claim 1, characterized in that: the finished sand fineness modulus control device includes two adjustable-speed metering belt scales connected to the PLC control system , one of which is set under the fine sand outlet, and the other is set under the coarse sand outlet of the material splitting device. 10. The floor-to-ceiling production line capable of simultaneously producing sand and aggregate according to claim 1, characterized in that: the secondary wind separation equipment is a frequency conversion type powder separator that uses positive and negative pressure methods to combine separation of stone powder content.