CN109013006B - Double-host crushing production line and method based on variable frequency control technology - Google Patents
Double-host crushing production line and method based on variable frequency control technology Download PDFInfo
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- CN109013006B CN109013006B CN201810867603.XA CN201810867603A CN109013006B CN 109013006 B CN109013006 B CN 109013006B CN 201810867603 A CN201810867603 A CN 201810867603A CN 109013006 B CN109013006 B CN 109013006B
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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
- B02C21/00—Disintegrating plant with or without drying of the material
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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
- B02C25/00—Control arrangements specially adapted for crushing or disintegrating
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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
- B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling 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
- B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
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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
- B07B2201/00—Details applicable to machines for screening using sieves or gratings
- B07B2201/04—Multiple deck screening devices comprising one or more superimposed screens
Abstract
The invention discloses a double-host crushing production line and a method based on a variable frequency control technology, wherein the double-host crushing production line comprises a shaping machine and a sand making machine, discharge ports of the shaping machine and the sand making machine are connected with a feed inlet of a vibration screening mechanism through an operating belt, the vibration screening mechanism comprises a vibrating screen and a material diverter, the shaping machine, the sand making machine and the material diverter are all connected with a PLC control system, the variable frequency control technology of the PLC control system enables the shaping machine and the sand making machine to start in a variable frequency mode, regulates and controls the rotating speed and the frequency of the sand making machine, can regulate and control the diversion proportion of the material diverter, effectively avoids impact on a power grid when a motor is started, has good stability and high safety coefficient, flexibly controls the production proportion of various discharged materials, reasonably diverts the materials, and has high control precision and high efficiency and energy conservation.
Description
Technical Field
The invention relates to a double-host crushing production line and method based on a variable frequency control technology, and belongs to the technical field of sand production equipment.
Background
At present, in a conventional crushing production line, single main finished sand is mostly adopted in a sand making crushing section, specifically, materials are crushed by a vertical shaft crusher and enter a screening system, qualified products enter a finished product bin by a finished product belt conveyor, and super-diameter materials are conveyed back to the vertical shaft crusher by a return belt conveyor for mechanical crushing. The conventional crushing production line has the advantages of saving equipment investment, having single function, being only capable of single-stage crushing and being incapable of grading adjustment; if the gradation adjustment is needed, the crushing ratio of the crusher can be changed only by replacing the vertical shaft crushing motor or adjusting the rotating speed of the belt pulley, and the operation is troublesome. In addition, if the single-host process only produces finished sand completely, the crushing ratio is small and the yield is low. If the yield is to be increased, the feed particle size must be reduced, which would increase the size of the feed by a single break, and also increase the equipment investment.
In addition, in the crushing production line, when the vertical shaft for sand production is started and stopped, the conventional mode is a depressurization starting mode or a soft starting mode, because the power of the motor for the vertical shaft is large, the motor can generate large impact on a power grid when being started, the danger coefficient is high, and the possibility that the motor cannot be started when the voltage is lower than 380V is caused, so that the stable operation of the crushing production line is influenced.
Disclosure of Invention
The invention aims to solve the technical problem of providing a double-host crushing production line and a double-host crushing production method based on a frequency conversion control technology, which can overcome the defects of the prior art.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the utility model provides a broken production line of double host computer based on frequency conversion control technique, includes plastic machine and sand making machine, the feed inlet and the surge bin of plastic machine are connected, plastic machine and sand making machine's discharge gate are connected with vibration screening mechanism feed inlet through the operation belt, vibration screening mechanism includes shale shaker and material shunt, the screen cloth of shale shaker is multilayer setting, and its top layer lateral part is equipped with the reducing material passageway that is connected to plastic machine feed inlet, and the lower part is equipped with the finished product sand export that is connected to finished product sand warehouse, and middle screen cloth layer lateral part all is equipped with the finished product aggregate passageway to the material shunt that all corresponds to be equipped with it below each layer of finished product aggregate passageway, and one discharge gate and the aggregate warehouse of material shunt are connected, and another discharge gate is connected to plastic machine, sand making machine's feed inlet; and the shaping machine, the sand making machine and the material flow divider are all connected with the PLC control system through control circuits.
The screen mesh of the vibrating screen is provided with more than three layers, namely a reducing material layer, a finished product crushed stone layer and a finished product rice layer in sequence from top to bottom, and an aggregate channel at the side part of the reducing material layer is connected with a buffer bin; the aggregate channels of the finished crushed stone layer and the finished rice stone layer are respectively connected with the corresponding material flow dividers.
The finished crushed stone layer is connected to the feeding port of the shaping machine through a material diverter, and the finished rice stone layer is connected to the feeding port of the sand making machine through a material diverter.
The shaper is a PL9500YP overflow type double-motor vertical shaft shaper; the sand making machine is a GSP65 type overflow type high-speed high-frequency vertical shaft broken sand making machine.
The material diverter is an electrohydraulic distributor, and a driving mechanism of the electrohydraulic push rod is connected with a PLC control system.
A double-host crushing method based on a variable frequency control technology comprises the following steps:
a. starting the shaping machine and the sand making machine by using a variable frequency control technology of a PLC control system;
b. crushing and shaping the raw materials in a shaping machine, and discharging a material mixture with four specifications of finished sand, finished rice stone, finished broken stone and super-diameter materials;
c. conveying the material mixture with four specifications into a vibrating screening mechanism, and returning the super-diameter material to a shaping machine for continuous crushing and shaping after the material mixture enters the vibrating screen; conveying the finished sand into a finished sand warehouse; the method comprises the steps that finished rice stones and finished broken stones enter a material diverter, and a PLC control system controls the diversion proportion of the material diverter to enable the material diverter to be stored in a corresponding aggregate warehouse and/or enter a shaping machine and a sand making machine;
d. the PLC control system controls the rotating speed and the frequency of the shaping machine and the sand making machine, and simultaneously adjusts the diversion proportion of the material diverter and controls the production proportion of aggregate and machine-made sand.
The raw materials are aggregate or mixture, and the particle size of the aggregate or mixture is smaller than 60mm.
The rotating speed of the sand making machine is improved through the PLC control system, and meanwhile, the material flow divider is regulated and controlled to enable most or all of the finished aggregate to enter the shaping machine and the sand making machine, so that the production quantity of the finished sand is improved.
The rotating speed of the sand making machine is reduced through the PLC control system, and meanwhile, the material diverter is regulated and controlled to enable most or all of the finished aggregate to enter the aggregate warehouse, so that the production quantity of the finished rice stones and the finished broken stones is improved.
Compared with the prior art, the invention discloses a double-host crushing production line and a double-host crushing production method based on a variable frequency control technology, which adopt double-host operation, and comprise a shaping machine and a sand making machine, wherein the discharge ports of the shaping machine and the sand making machine are connected with the feed inlet of a vibration screening mechanism through an operating belt, the vibration screening mechanism comprises a vibrating screen and a material splitter, the shaping machine, the sand making machine and the material splitter are all connected with a PLC control system, the variable frequency control technology of the PLC control system enables the shaping machine and the sand making machine to start variable frequency, the rotating speed and the frequency of the sand making machine can be regulated, the distribution proportion of the material splitter can be regulated, aggregates or mixture firstly enter the shaping machine to be crushed and shaped, and after the material mixture enters the vibrating screen, the super-diameter material on the top layer of the vibrating screen returns to the shaping machine to be crushed and shaped continuously; conveying the finished sand flowing out from the bottom into a finished sand warehouse; the finished rice stones and the finished broken stones in the middle screen layer enter the material diverter, the PLC control system controls the diversion proportion of the material diverter to store the material diverter into a corresponding aggregate warehouse and/or enter the shaping machine and the sand making machine, the PLC control system regulates and controls the double-host crushing, shaping and sand making, regulates and controls the diversion proportion of the material diverter, can flexibly control the discharging condition to only produce finished sand, can also simultaneously produce the finished sand, the rice stones and the broken stones, flexibly control the production proportion of various discharging materials, does not need to carry out mechanical adjustment, saves time and labor, has high control precision and has high production efficiency.
The invention has the following beneficial effects:
(1) The main machine is started and stopped by the variable frequency control technology, so that the impact on a power grid during the starting of the motor can be effectively avoided, the motor can be started when the voltage is insufficient, the applicability is strong, the stability is good, and the safety coefficient is high.
(2) The motor rotating speed is regulated by constant power through a frequency conversion technology, the crushing ratio of the crushing system can be flexibly regulated, the motor belt pulley does not need to be replaced or other mechanical regulation is not needed, the applicability is wide, the structure is simple, the regulation is simple and convenient, the time and the labor are saved, and the labor intensity of workers is greatly reduced.
(3) The speed ratio of the double main machines is reasonably adjusted through a frequency conversion control technology, so that automatic production is realized, the production efficiency is high, the flexibility is high, the production proportion of aggregate and machine-made sand is effectively controlled, one machine is more productive, even only sand is produced without aggregate, one machine can be multipurpose, namely, the grain shape of the aggregate and the yield of the aggregate can be freely controlled in selection through adjusting the speed of the shaping machine; the rotation speed of the sand making machine can be adjusted freely on the control of the machine-made sand yield and the aggregate yield, so that the production efficiency and the quality of finished products are greatly improved.
(4) According to the design, under the condition that the processing capacity is not affected, the rotating speed is adjusted through frequency conversion, materials are reasonably split, the double main machines are matched in the respective crushing ranges efficiently, the double main machines can operate at full load, the electric energy consumption of the whole production line is reduced, and the energy-saving and efficient production line is realized.
Drawings
Fig. 1 is a schematic of the workflow of the present invention.
Fig. 2 is a schematic diagram of a frequency conversion control technique of the PLC control system.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention:
as shown in figure 1, the double-host crushing production line based on the variable frequency control technology comprises a shaping machine 2 and a sand making machine 1, wherein a feed inlet of the shaping machine 2 is connected with a buffer bin 4, a feed device 3 is arranged above the buffer bin 4, a discharge outlet of the shaping machine 2 and the sand making machine 1 is connected with a feed inlet of a vibration screening mechanism through a running belt 5, the vibration screening mechanism comprises a vibrating screen 6 and a material splitter, a screen mesh of the vibrating screen 6 is arranged in multiple layers, particularly more than three layers, and comprises a super-diameter material layer, a finished product crushed stone layer, a finished product rice stone layer and a finished product sand outlet which is connected to a finished product sand warehouse 13 from top to bottom in sequence, and a discharge channel at the side part of the super-diameter material layer is connected with the buffer bin 4 so that the super-diameter material can return to the shaping machine 2 for re-crushing; the aggregate channels of the finished crushed stone layer and the finished rice stone layer are respectively provided with a material diverter connected with the aggregate channels, so that the finished crushed stone and the finished rice stone respectively flow into the corresponding material diverters, one discharge port of the material diverters is connected with an aggregate warehouse, the other discharge port of the material diverters is connected to the feed inlets of the shaping machine 2 and the sand making machine 1, specifically, the finished crushed stone is connected to the feed inlet of the shaping machine 2 through the material diverters 8, the finished rice stone is connected to the feed inlet of the sand making machine 1 through the material diverters 9, and a part of the diverted finished crushed stone and finished rice stone are respectively stored into the finished crushed stone bin 11 and the finished product Mi Dancang through the finished product belt 14; the other part is conveyed into a shaping machine 2 and a sand making machine 1 for re-crushing, so that a closed-loop production line is formed; the shaping machine 2, the sand making machine 1 and the material flow divider 8 are all connected with the PLC control system 7 through the control circuit 701, the PLC control system 7 comprises a PLC controller and a variable frequency control device connected with the PLC controller, the variable frequency starting of the shaping machine and the sand making machine can be controlled and regulated through the PLC control system 7, the rotating speed and the frequency of the shaping machine and the sand making machine can be regulated and regulated, the material flow divider is an electrohydraulic distributor, and a driving mechanism of an electrohydraulic push rod of the material flow divider is connected with the PLC control system, so that the split ratio of the material flow divider can be regulated and regulated.
As shown in fig. 2, the principle of the frequency conversion control technology is as follows: the shaper 2 is a PL9500YP overflow type double-motor vertical shaft shaper, and is provided with a main motor 201 and a secondary motor 202; the sand making machine 1 is a GSP65 type overflow high-speed high-frequency vertical shaft sand breaking machine, a single motor 101 is configured, a frequency converter 702 is arranged in a control circuit 701, specifically, a main motor control circuit of the shaping machine 2 comprises a frequency conversion starting circuit 7011 and a voltage stabilizing working circuit 7012, the frequency converter 702 is arranged on the frequency conversion starting circuit 7011 to enable the frequency conversion starting circuit to perform frequency conversion starting, meanwhile, a time relay T1 and a relay switch KM1 are arranged on the frequency conversion starting circuit 7011, a relay switch KM2 and a time relay T2 which are matched and interlocked with the relay switch KM1 are arranged on the voltage stabilizing working circuit 7012, on-off switching of the frequency conversion starting circuit 7011 and the voltage stabilizing working 7012 can be realized through the time relay T1 and the interlocked relay switches KM2, the frequency conversion starting circuit 7011 is electrified, after the frequency conversion starting of the main motor 201 reaches the highest rotating speed, the time relay T1 is electrified and is delayed to be disconnected, and meanwhile, the main motor voltage stabilizing working circuit 7012 is electrified and works; the time relay T2 is connected with a relay switch KM3 arranged on the auxiliary motor working circuit 7013, the time relay T2 is powered on for delayed actuation, the relay switch KM3 is powered on for closing, and the auxiliary motor 202 is directly switched into a power supply for rotation; the relay switch KM3 is connected with the relay switch KM4, so that the relay switch KM4 is electrically closed, a time relay T3 is arranged on the auxiliary motor working circuit 7013, the time relay T3 is connected with the relay switch KM5 arranged on the motor 101 working circuit of the sand making machine, the time relay T5 is electrically delayed and sucked, the relay switch KM5 is electrically closed, the motor working circuit 7014 of the sand making machine is electrified, the sand making machine is started in a variable frequency mode, meanwhile, when the highest rotating speed is reached, the frequency speed can be regulated through the frequency converter 702, the frequency is output through weak current signals, parameters and variables, the frequency is changed, and the mechanical equipment can stably run along the slope angular speed to reach the power frequency under the static state, so that the mechanical and electrical integrated operation of the equipment is satisfied.
A double-host crushing method based on a variable frequency control technology specifically comprises the following steps:
(1) Starting the shaping machine 2 and the sand making machine 1 through the variable frequency control technology of the PLC control system 7;
(2) Crushing and shaping the raw materials in a shaping machine 2, discharging a material mixture with four specifications of finished sand, finished rice stone, finished broken stone and super-diameter materials, wherein the raw materials are aggregate or mixture, and the particle size of the aggregate or mixture is smaller than 60mm;
(3) Conveying the material mixture with four specifications into a vibrating screening mechanism, and conveying the material mixture into a buffer bin after the material mixture enters a vibrating screen 6, so that the material mixture returns to a shaping machine 2 for re-crushing and shaping; the finished sand is conveyed into a finished sand warehouse 13; the method comprises the steps that finished rice stones and finished broken stones enter a material diverter, and a PLC control system controls the diversion proportion of the material diverter to enable the material diverter to be stored in a corresponding aggregate warehouse and/or enter a shaping machine and a sand making machine;
(4) The PLC control system controls the rotating speed and the frequency of the shaping machine and the sand making machine, and simultaneously adjusts the diversion proportion of the material diverter and controls the production proportion of aggregate and machine-made sand.
Specifically, when the finished product sand is mainly produced, the PLC control system controls the rotating speed of the sand making machine 1 to be increased, and simultaneously regulates and controls the material flow divider to enable most or all of the finished product aggregate to enter the shaping machine and the sand making machine, so that the production quantity of the finished product sand can be increased, and the finished product aggregate can be enabled to enter the shaping machine and the sand making machine completely, so that the production line can only produce the finished product sand.
When the aggregate is mainly produced, the PLC control system controls the rotation speed of the sand making machine 1 to be reduced, and simultaneously regulates and controls the material diverter to enable most or all of the finished aggregate to enter the aggregate warehouse, so that the production quantity of the finished rice stones and the finished crushed stones can be improved.
Claims (6)
1. The utility model provides a broken production line of double host computer based on variable frequency control technique, includes trimmer and sand making machine, the feed inlet and the surge bin of trimmer are connected, its characterized in that: the material outlets of the shaping machine and the sand making machine are connected with the material inlet of the vibration screening mechanism through the operation belt, the vibration screening mechanism comprises a vibration screen and a material diverter, the screen of the vibration screen is arranged in multiple layers, the lateral part of the top layer of the vibration screen is provided with a reducing material channel connected with the material inlet of the shaping machine, the lower part of the vibration screen is provided with a finished sand outlet connected with a finished sand warehouse, the lateral part of the middle screen layer is provided with a finished aggregate channel, the lower part of each layer of finished aggregate channel is correspondingly provided with the material diverter connected with the material channel, one material outlet of the material diverter is connected with the aggregate warehouse, and the other material outlet is connected with the material inlets of the shaping machine and the sand making machine; the shaping machine, the sand making machine and the material flow divider are all connected with a PLC control system through control circuits, and the PLC control system comprises a PLC controller and a variable frequency control device connected with the PLC controller;
the shaper is a PL9500YP overflow type double-motor vertical shaft shaper; the sand making machine is a GSP65 type overflow type high-speed high-frequency vertical shaft broken sand making machine;
the screen mesh of the vibrating screen is provided with more than three layers, namely a reducing material layer, a finished product crushed stone layer and a finished product rice layer in sequence from top to bottom, and an aggregate channel at the side part of the reducing material layer is connected with a buffer bin; the aggregate channels of the finished crushed stone layer and the finished rice stone layer are respectively connected with the corresponding material flow dividers; the finished crushed stone layer is connected to a feeding hole of the shaping machine through a material diverter, and the finished rice stone layer is connected to a feeding hole of the sand making machine through the material diverter.
2. The variable frequency control technology-based double-host crushing production line according to claim 1, wherein: the material diverter is an electrohydraulic distributor, and a driving mechanism of an electrohydraulic push rod of the material diverter is connected with the PLC control system.
3. The double-host crushing method based on the frequency conversion control technology is applied to the double-host crushing production line based on the frequency conversion control technology as claimed in claim 1, and is characterized by comprising the following steps:
a. starting the shaping machine and the sand making machine by using a variable frequency control technology of a PLC control system;
b. crushing and shaping the raw materials in a shaping machine, and discharging a material mixture with four specifications of finished sand, finished rice stone, finished broken stone and super-diameter materials;
c. conveying the material mixture with four specifications into a vibrating screening mechanism, and returning the super-diameter material to a shaping machine for continuous crushing and shaping after the material mixture enters the vibrating screen; conveying the finished sand into a finished sand warehouse; the method comprises the steps that finished rice stones and finished broken stones enter a material diverter, and a PLC control system controls the diversion proportion of the material diverter to enable the material diverter to be stored in a corresponding aggregate warehouse and/or enter a shaping machine and a sand making machine;
d. the PLC control system controls the rotating speed and the frequency of the shaping machine and the sand making machine, and simultaneously adjusts the diversion proportion of the material diverter and controls the production proportion of aggregate and machine-made sand.
4. The double-host crushing method based on the variable frequency control technology according to claim 3, wherein: the raw materials are aggregate or mixture, and the particle size of the aggregate or mixture is smaller than 60mm.
5. The double-host crushing method based on the variable frequency control technology according to claim 3, wherein: the rotating speed of the sand making machine is improved through the PLC control system, and meanwhile, the material flow divider is regulated and controlled to enable most or all of the finished aggregate to enter the shaping machine and the sand making machine, so that the production quantity of the finished sand is improved.
6. The double-host crushing method based on the variable frequency control technology according to claim 3, wherein: the rotating speed of the sand making machine is reduced through the PLC control system, and meanwhile, the material diverter is regulated and controlled to enable most or all of the finished aggregate to enter the aggregate warehouse, so that the production quantity of the finished rice stones and the finished broken stones is improved.
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| CN109876917A (en) * | 2019-02-28 | 2019-06-14 | 贵州成智重工科技有限公司 | A kind of high-quality sandstone aggregate impacts dry milling production line and processing method entirely |
| CN109731661B (en) * | 2019-02-28 | 2023-10-27 | 贵州成智重工科技有限公司 | Five-double-full dry crushing production line for high-quality sand aggregate and processing method |
| CN112500007A (en) * | 2020-12-25 | 2021-03-16 | 日昌升建筑新材料设计研究院有限公司 | Dry production process for flexible machine-made sandstone |
| CN112619854A (en) * | 2020-12-25 | 2021-04-09 | 日昌升建筑新材料设计研究院有限公司 | Dry production process of flexible high-end machine-made sandstone |
| CN115055261A (en) * | 2022-04-22 | 2022-09-16 | 浙江博宇机电有限公司 | Large-scale dry-method sand making system and method |
| CN116060192B (en) * | 2023-03-06 | 2023-06-27 | 中铁工程服务有限公司 | Product proportion control method and device based on sand and stone co-production process |
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| CN203622661U (en) * | 2013-11-04 | 2014-06-04 | 上海金路成套设备有限公司 | Quality-product aggregate production line for premixed concrete |
| CN204487838U (en) * | 2015-03-17 | 2015-07-22 | 上海砼力人工砂装备有限公司 | Integrated-type environmental protection dry method sand production system |
| CN107263731A (en) * | 2017-06-30 | 2017-10-20 | 福建南方路面机械有限公司 | A kind of new aggregate production line |
| CN107377170B (en) * | 2017-09-01 | 2023-09-29 | 中国水利水电第十六工程局有限公司 | Artificial gravel aggregate production system |
| CN108129049A (en) * | 2018-02-12 | 2018-06-08 | 贵州成智重工科技有限公司 | A kind of Machine-made Sand production building station and sand method processed |
| CN208642930U (en) * | 2018-08-02 | 2019-03-26 | 贵州成智重工科技有限公司 | A kind of double host crushing production lines based on frequency conversion control technique |
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