CN106182437A - A kind of cement sand and gravel mixing apparatus and method - Google Patents

Abstract

The present invention provides a kind of cement sand and gravel mixing apparatus and method, in this equipment, batcher docks with lithotrite entrance, lithotrite outlet is connected to screening machine entrance through the first aggregate belt conveyor, screening machine outlet is connected to aggregate batching system one end through the second aggregate belt conveyor, the aggregate batching system other end docks with blender through the 3rd aggregate conveyer belt, cement bin accesses blender, and fine coal ash silo accesses blender, and blender is connected to finished product storage bin through Finished Product Transport System；Liquor system, water system are respectively connected to blender, and control system connects aggregate batching system, cement bin, liquor system, fine coal ash silo, water system, and air-channel system is respectively connected to fine coal ash silo, cement bin and finished product storage bin.Set rubble of the present invention, screening and agitating function, make production continuous, reduce production cost, improve the service life mixing and stirring efficiency and mixing drum, it is achieved be worked into the continuous automatic production obtaining cement sand and gravel from aggregate.

Description

Equipment and method for mixing cemented sand and gravel

technical field

The invention relates to the technical field of construction machinery, and relates to equipment and a method for mixing cemented sand and gravel.

Background technique

Cemented sand and gravel is composed of a small amount of cementitious material cemented natural sand and gravel, excavated gravel, and artificially crushed sand and gravel. It has many technical advantages such as local materials, simple construction, energy saving and environmental protection, economical and practical, safe and reliable. As a new type of building material, its engineering aggregate gradation fluctuates greatly, its mud content is high, and it is suitable for materials and structures. It has great prospects for promotion and application in the construction of dams, roadbeds, and bridges. At present, my country has built many cemented sand and gravel dam cofferdams (such as Fujian Jiemian and Hongkou, Yunnan Gongguo Bridge, Guizhou Shatuo, Sichuan Feixianguan and other cofferdam projects).

In the process of mixing cemented sand and gravel with existing professional equipment, sand, stone, cement and fly ash are fed into the mixing drum at the same time, and then water and admixture are added, and the uniform mixing operation is completed through the rotation of the mixing drum itself. Finally, the cemented sand and gravel material is obtained. Although this material contains water and cement, it is actually a wet bulk material, and the maximum diameter of the aggregate is 150mm. During the mixing process, the impact on the mixing drum is very large, which may easily cause damage to the mixing drum and its raceway. As one of the key components of the whole system, the mixing drum is large in size and heavy in weight. Once it breaks down, it needs to be shut down for a long time for maintenance, which will cause huge economic losses. In addition, the current construction method uses a loader for direct feeding, which lacks the function of crushing or screening, and it is difficult to avoid the mixing of some large aggregates (grain size greater than 150mm), which has a great impact on the final quality of mixing; and the existing The processing process also has disadvantages such as low efficiency, low output, poor quality, high labor intensity, and difficulty in continuous operation. Therefore, it is urgent to invent a new type of cemented sand and gravel mixing system to achieve the purpose of improving the strength and performance of the mixing drum, realizing aggregate crushing and screening, enhancing processing capacity, efficiency and quality, and making continuous production automation.

Contents of the invention

Aiming at the deficiencies in the prior art, the invention provides a cemented sand and gravel mixing equipment and method.

Technical scheme of the present invention is:

The invention provides a cemented sand and gravel mixing equipment, including: a feeder, a crushing machine, a screening machine, an aggregate batching system, a mixer, an air system, a finished product delivery system, a finished product storage bin, a cement bin, and a liquid agent system, fly ash bin, water supply system, control system;

The feeder is connected to the inlet of the crusher, the outlet of the crusher is connected to the inlet of the screening machine through the first aggregate conveying belt, and the outlet of the screening machine is connected to one end of the aggregate batching system through the second aggregate conveying belt, and the other end of the aggregate batching system One end is connected to the mixer through the third aggregate conveyor belt, the cement silo is connected to the mixer through the cement screw conveyor and the cement weighing screw machine in turn, and the fly ash silo is connected to the mixer through the fly ash screw conveyor and the fly ash weighing screw machine in turn. Connected to the mixer, the mixer is connected to the finished product storage bin through the finished product conveying system;

The liquid agent system and the water supply system are respectively connected to the mixer, the control system is connected to the aggregate batching system, cement silo, liquid agent system, fly ash silo, and water supply system, and the gas system is respectively connected to the fly ash silo, cement silo and finished product storage. Silo.

The aggregate batching system includes an aggregate bin and an aggregate metering belt, the inlet of the aggregate bin is connected to the second aggregate conveying belt, the outlet of the aggregate bin is connected to one end of the aggregate metering belt, and the other end of the aggregate metering belt is connected to the second aggregate conveyor belt. Three conveyor belts.

The finished product conveying system includes a material guide trough and a finished product belt conveyor. One end of the material guide trough cooperates with the mixer, the other end of the material guide trough cooperates with one end of the finished product belt conveyor, and the other end of the finished product belt conveyor cooperates with the finished product storage bin.

The mixer adopts a prefabricated mixing drum, which is a three-section type, and each section is matched and connected, and two joints respectively form a raceway.

The present invention also provides a method for mixing cemented sand and gravel, comprising:

The feeder feeds the gravel into the crusher;

The gravel is crushed by the stone crusher, and the obtained aggregate is transported to the screening machine through the first aggregate conveying belt;

The screening machine sieves the aggregates to obtain aggregates with qualified diameters, which are transported to the aggregate batching system through the second aggregate conveying belt, and aggregates with unqualified diameters are returned to the crusher for reprocessing through the fourth aggregate conveying belt;

The aggregate with qualified diameter is sent to the mixer after being controlled by the control system;

The control system controls the liquid agent system and the water supply system to work, and sends liquid agent and water to the mixer;

The fly ash in the fly ash silo enters the mixer through the fly ash screw conveyor, and the cement in the cement silo enters the mixer through the cement screw conveyor;

The finished product is stirred by the mixer, which is transported to the finished product storage bin through the finished product conveying system.

The present invention also provides a method for mixing cemented sand and gravel, comprising:

The feeder feeds the gravel into the crusher;

The gravel is crushed by the stone crusher, and the obtained aggregate is transported to the screening machine through the first aggregate conveying belt;

The screening machine sieves the aggregates to obtain aggregates with qualified diameters, which are transported to the aggregate batching system through the second aggregate conveying belt, and aggregates with unqualified diameters are returned to the crusher for reprocessing through the fourth aggregate conveying belt;

Aggregate with a qualified diameter is sent to the aggregate silo, and the aggregate in the aggregate silo falls to the aggregate metering belt for metering and batching, and then is sent to the mixer through the aggregate conveyor belt c;

The control system controls the liquid agent system and the water supply system to work, and sends liquid agent and water to the mixer;

The fly ash in the fly ash silo enters the mixer through the fly ash screw conveyor, and the cement in the cement silo enters the mixer through the cement screw conveyor;

The finished product is stirred by the mixer, and is transported to the finished product storage bin through the finished product conveying system.

The present invention also provides a method for mixing cemented sand and gravel, comprising:

The feeder feeds the gravel into the crusher;

The gravel is crushed by the stone crusher, and the obtained aggregate is transported to the screening machine through the aggregate conveying belt a;

After the aggregate is sieved by the screening machine, the aggregate with a qualified diameter is transported to the aggregate batching system through the conveyor belt b, and the aggregate with an unqualified diameter is returned to the crusher for reprocessing through the aggregate conveyor belt d;

Aggregate with qualified diameter is sent to the mixer after being batched by the control system to control the aggregate batching system;

The control system controls the liquid agent system and the water supply system to work, and sends liquid agent and water to the mixer;

The fly ash in the fly ash silo enters the mixer through the fly ash screw conveyor, and the cement in the cement silo enters the mixer through the cement screw conveyor;

The finished product is stirred by the mixer, and it reaches the finished product belt conveyor through the material guide groove, and is transported to the finished product storage bin.

The present invention also provides a method for mixing cemented sand and gravel, comprising:

The feeder feeds the gravel into the crusher;

The gravel is crushed by the stone crusher, and the obtained aggregate is transported to the screening machine through the aggregate conveying belt a;

The screening machine screens the aggregates to obtain aggregates with qualified diameters, which are transported to the aggregate batching system through the aggregate conveying belt b, and aggregates with unqualified diameters are returned to the crusher for reprocessing through the aggregate conveying belt d;

Aggregate with a qualified diameter is sent to the aggregate silo, and the aggregate in the aggregate silo falls to the aggregate metering belt for metering and batching, and then is sent to the mixer through the aggregate conveyor belt d;

The control system controls the liquid agent system and the water supply system to work, and sends liquid agent and water to the mixer;

The fly ash in the fly ash silo enters the mixer through the fly ash screw conveyor, and the cement in the cement silo enters the mixer through the cement screw conveyor;

The finished product is stirred by the mixer, and it reaches the finished product belt conveyor through the material guide groove, and is transported to the finished product storage bin.

Beneficial effect:

The cemented sand and gravel mixing equipment and method provided by the invention integrate the functions of gravel, sieving and mixing, which reduces the requirements for raw materials and expands production capacity; makes production continuous and concentrated, and reduces production costs ;Improve the automation level, reduce the labor intensity and operation risk factor; realize the continuous automatic production from aggregate processing to cemented sand and gravel products, improve the mixing efficiency and quality; improve the design structure of the mixing drum, and enhance the mixing cartridge reliability and service life. The cemented sand and gravel mixing system can better avoid unexpected accidents at the job site and meet the stringent requirements of the working conditions on the mixing equipment.

In addition, the cemented sand and gravel mixing equipment of the present invention has a reasonable structural design, adopts a modular design, and has precise positioning between each part, and each link has an accurate measuring instrument to achieve high-precision proportioning. The layout is convenient, the floor area is small, and each part can be assembled and used separately. It adopts no-foundation design, which is convenient for disassembly, transportation, maintenance and assembly, and flexible to use. The layout of the mixing system can be designed according to the needs, and it is suitable for various complex terrain structures.

Description of drawings

Figure 1 is a schematic diagram of the structure of the cemented sand and gravel mixing equipment arranged in a straight line according to the specific embodiment of the present invention. Structural top view of gravel mixing equipment;

Fig. 2 is the structural block diagram of the cemented sand and gravel mixing equipment of embodiment 1 of the present invention;

Fig. 3 is the structural block diagram of the cemented sand and gravel mixing equipment of embodiment 2 of the present invention;

Fig. 4 is the structural block diagram of the cemented sand and gravel mixing equipment of embodiment 3 of the present invention;

Fig. 5 is a structural block diagram of cemented sand and gravel mixing equipment according to Embodiment 4 of the present invention;

Fig. 6 is the schematic diagram (gear transmission) of the agitator of embodiment 1 of the present invention;

7 is a schematic diagram of an assembled mixing drum according to Embodiment 1 of the present invention;

Fig. 8 is a perspective view of the welded mixing cylinder structure of the prior art;

Fig. 9 is the raceway welded mixing drum in the prior art;

Fig. 10 is a side view of one side of the discharge port of the raceway welded roller in the prior art;

Fig. 11 is a side view of the feed inlet side of the raceway welded roller in the prior art;

Fig. 12 is a schematic structural view of the water supply system of the cemented sand and gravel mixing equipment in Example 1 of the present invention;

Fig. 13 is a schematic structural diagram of the liquid agent system of the cemented sand and gravel mixing equipment in Example 1 of the present invention;

Fig. 14 is a block diagram of a network intelligent control system according to Embodiment 1 of the present invention;

Fig. 15 is a control block diagram of the powder aggregate metering system in Embodiment 1 of the present invention;

Fig. 16 is a control block diagram of the liquid metering system in Embodiment 1 of the present invention;

Fig. 17 is a top view of a U-shaped arrangement of cemented sand and gravel mixing equipment according to Embodiment 2 of the present invention;

Fig. 18 is a schematic diagram of a mixer according to Embodiment 2 of the present invention (gear and friction wheel transmission);

In the figure, 1-feeder, 2-crushing machine, 3-first aggregate conveying belt, 4-screening machine, 5-second aggregate conveying belt, 6-aggregate bin, 7-aggregate metering conveying Belt, 8-third aggregate conveyor belt, 9-mixer, 9a-front, 9b-middle, 9c-tail, 9d-front raceway, 9e-rear raceway, 9f-bolt, 10-guide groove, 11-finished product belt conveyor, 12-air system, 13-finished product storage bin, 14-cement silo, 15-cement screw conveyor, 16-cement weighing screw machine, 17-liquid agent system, 18-fly ash Warehouse, 19-fly ash screw conveyor, 20-fly ash screw weighing machine, 21-water supply system, 22-control system, 23-water storage tank, 24-pipeline pump, 25-water supply flowmeter, 26- Water electric regulating valve, 27-liquid agent cylinder, 28-liquid agent pump, 29-liquid agent flowmeter, 30-liquid agent electric regulating valve.

detailed description

Below in conjunction with accompanying drawing, specific embodiment of the present invention is described in detail, and it should be pointed out that the following description is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Any simple modifications, equivalent changes and modifications made in the examples still belong to the protection scope of the technical solution of the present invention.

Example 1

A cemented sand and gravel mixing equipment, including: a feeder 1, a crushing machine 2, a screening machine 4, an aggregate batching system, a mixer 9, an air system 12, a finished product conveying system, a finished product storage bin 13, and a cement bin 14. Liquid agent system 17, fly ash bin 18, water supply system 21, control system 22. A kind of cemented sand and gravel mixing equipment adopts the inline layout shown in Figure 1, Figure 1 (a) is the front view of the structure of the cemented sand and gravel mixing equipment in the inline layout, and Figure 1 (b) is the inline layout of the glue The top view of the structure of the sand and gravel mixing equipment; the mixer 9 is arranged obliquely and driven by gears. The cemented sand and gravel mixing equipment according to the specific embodiment of the present invention adopts a baseless structure design and is supported on the foundation by a steel structure frame, and each part can be used alone or in combination. It has the advantages of easy movement, fast construction, and high positioning accuracy between components.

The feeder 1 is connected to the entrance of the stone crusher 2, the exit of the stone crusher 2 is connected to the entrance of the screening machine 4 through the first aggregate conveying belt 3, and the exit of the screening machine 4 is connected to the aggregate batching system through the second aggregate conveying belt 5 One end, the other end of the aggregate batching system is connected to the mixer 9 through the third aggregate conveyor belt 8, the cement silo 14 is connected to the mixer 9 through the cement screw conveyor 15 and the cement weighing screw machine 16 in turn, and the fly ash silo 18 is passed through in turn The fly ash screw conveyor 19 and the fly ash weighing screw machine 20 are connected to the mixer 9, and the mixer 9 is connected to the finished product storage bin 13 through the finished product conveying system.

The liquid agent system 17 and the water supply system 21 are respectively connected to the mixer 9, the control system 22 is connected to the aggregate batching system, the cement silo 14, the liquid agent system 17, the fly ash silo 18, and the water supply system 21, and the gas circuit system 12 is respectively connected to the powder Coal ash bin 18, cement bin 14 and finished product storage bin 13.

In this embodiment, the feeder 1 is a vibrating feeder, and the original gravel is fed into the crusher evenly, continuously and quantitatively in the gravel production line, so as to avoid the blockage of the feed port of the crusher and make the whole production continuous and stable. .

In this embodiment, the stone crusher 2 is an impact crusher, which has multi-stage impact chambers and sufficient crushing space, and is suitable for crushing bulky materials. The maximum feeding diameter can reach 700mm, and the spindle speed can reach 300r/min. An aggregate conveying belt 3 cooperates and conveys to the screening machine 4 . The feed particle size of the impact crusher can reach 700mm, and the requirements for raw materials are low, which greatly improves the production capacity. It can discharge large quantities of materials efficiently and continuously, and the stable output can reach 200m ³ /h.

The raw material of the crusher 2 is loaded into the feeder 1 by the loader, and fed into the crusher 2 uniformly and quantitatively by the feeder 1 . The aggregate obtained by the crusher 2 is transported by the first aggregate conveying belt 3 to the screening machine 4. The screening machine 4 adopts the Y series circular vibrating screen and performs circular motion. It is a multi-layer, high-efficiency new type of vibrating screen. It is designed for screening materials in quarries. The feed size can reach 400mm. It is mainly composed of screen box, screen mesh, shock-absorbing spring device, chassis, etc. The vibrator is installed on the side plate of the screen box, and the motor passes through the shaft. The device drives the rotation. The screening function ensures that the maximum aggregate diameter in the mixing drum does not exceed 150mm, which helps to reduce impact damage to the mixing drum. The qualified aggregate obtained by the screening machine 4 is transported to the aggregate batching system through the second aggregate conveying belt 5, and the unqualified aggregate is returned to the crusher for reprocessing through the fourth belt conveyor.

In actual production at present, the raceway welding type mixing drum shown in Figure 8 and Figure 9 in the prior art welds the raceway segments on the drum, and Figure 10 is the raceway welding type mixing drum in the prior art The side view of the side of the discharge port of the drum, Figure 11 is a side view of the side view of the feed port of the raceway welded drum in the prior art. As shown in Figure 9, the two raceways before welding raceway A and after welding raceway C are respectively welded in the front and rear areas of the drum, and there is a rib B between the welded raceway A and the welded raceway C, However, the strength of the weld is low, and it is prone to damage and cracking. In view of this problem, the mixer 9 in this embodiment adopts an assembled mixing drum as shown in Figure 7. This assembled mixing drum is a three-stage type, including the mixing drum The front part 9a, the middle part 9b, and the tail part 9c are connected by bolts 9f between each section, and the two joints form a raceway respectively, including a front raceway 9d and a rear raceway 9e. Since a certain space is required for installing the bolt 9f, the radial dimension of the raceway of the mixing drum in this embodiment is slightly larger. The schematic diagram of the mixer 9 is shown in Figure 6. The mixer 9 adopts no foundation structure, and the interior of the cylinder is divided into three areas: feeding, lifting, and discharging. structure, with blades in all three areas. Different sections are equipped with different lengths and different types of blades in the feeding section, mixing section and discharging section. The blades are made of wear-resistant steel plates, distributed in the cylinder in a staggered and spiral manner, and can be disassembled. The material is pushed, divided and lifted under the joint action of the feeding blade, lifting blade and discharging blade in the mixing drum, so that the mutual position of the material is constantly changing during the advancing process, and the cross-dimensional mixing is realized, so as to achieve uniform mixing the goal of.

The finite element method is used to calculate the strength of the assembled mixing drum in this embodiment, wherein the material of the mixing drum is 16Mn steel, the allowable stress is 250MPa, the elastic modulus E=210GPa, Poisson's ratio μ=0.3, and the density ρ=7800kg/m³ . An automatic method (hexahedral elements) is used for meshing this new structure with an element size of 30 mm. The fixed constraint is located on the baffle in the middle of the mixing drum; in addition, the cemented sand and gravel density ρ=2450kg/m³, the rotating speed of the mixing drum is 16rpm, the inclination angle of the mixing drum is 5°, and the pressure of the mixing drum is applied according to the actual situation, including the weight of the drum And the weight of the material contained and the centrifugal force generated by the rotation of the mixing drum, finally, the supporting force at each supporting wheel is F=33200N. The supporting wheel and the mixing drum are in line contact in theory, but in fact, due to the plastic deformation must be surface contact, the numerical model will be simulated according to the surface contact; the mixing drum rotates at a constant speed during work, so the force is also uniform in the circumferential direction In order to facilitate the calculation and ensure the accuracy, the static calculation and analysis of the mixing drum is carried out. The maximum stress of the assembled mixing drum is 7.52 MPa, and the maximum strain is 3.76×10 ^-5 mm, and the stress and strain are evenly distributed in the contact area between the supporting roller and the mixing drum.

Through the analysis, it can be seen that compared with the general design of the mixing drum structure, the assembled mixing drum has higher raceway strength, smaller stress and strain values, and higher reliability of the raceway, that is, a longer service life. This is because the radial size, deflection and rigidity of the raceway are large, the elastic deformation generated during operation is small, and the alternating stress it bears is also small, which is conducive to the increase of its service life; in addition, the raceway and the cylinder are integrated, The structure is reliable, and the strength of the raceway is stronger than that of the roller, so it is not easy to be damaged; in addition, the bolt connection has strong shock and vibration resistance, high reliability, and has the advantages of simple structure and convenient disassembly and assembly. Therefore, the raceway of the assembled mixing drum has higher strength and better reliability.

Both the cement silo and the fly ash silo have a partial cone structure, and arch breaking devices and waterproof retaining rings are installed above the cone outlets of the cement silo and fly ash silo. One end of the conveyor is docked, the other end of the screw conveyor is docked with one end of a weighing screw machine, the other end of the weighing screw machine is connected to the feeding pipe through a cloth bag, and the other end of the feeding pipe is inserted into the mixer.

The air circuit system 12 is mainly composed of an air compressor, an air control box, a flow-aiding air cushion, and a cylinder. Part of the compressed air generated by the air compressor is supplied to the flow aid pads on the fly ash silo and cement silo for arch breaking, and part of it is supplied to the cylinder of the finished product storage silo for opening and closing the discharge door.

As shown in Figure 13, the liquid agent system 17 comprises a liquid agent cylinder 27, a liquid agent pump 28, a liquid agent flowmeter 29, and a liquid agent electric regulating valve 30, and the liquid agent cylinder 27 is provided with a stirring device, and the stirring device includes a reduction motor, Stirring shaft, stirring blades, geared motor drives the stirring shaft, the stirring shaft is provided with stirring blades, and the liquid is connected to the mixer 9 through the liquid pump 28, the liquid flow meter 29, and the liquid electric regulating valve 30 in turn.

As shown in Figure 12, the water supply system 21 is mainly composed of a water storage tank 23, a pipeline pump 24, a water supply flow meter 25, and a water electric control valve 26. The water in the water storage tank 23 is pressurized by the pipeline pump 24, and the water supply flow meter 25. The water electric control valve 26 flows into the mixer 9.

As shown in Figure 14, the control system of this embodiment 1 is composed of a control room, on-site detection and execution system, on-site monitoring system and GPRS remote wireless communication system, and the control room, on-site monitoring system and on-site detection Wireless communication with the execution system realizes remote monitoring. Through the RS-485 interface, the Modbus field bus technology is used to conduct networked on-site detection, on-site control and execution of the equipment. Using "multi-channel network intelligent instrument", one instrument can meet the data detection needs of the system, realize the full digital network control, the control system has less equipment, fewer lines, reliable signal transmission, high precision and high degree of intelligence; With automatic and manual control functions. The material ratio can be set, and the set value and actual value data are displayed in real time. Adopt PID intelligent control mode, alarm for lack of material, automatic shutdown for insufficient material supply, production data can be stored.

The lower part of the aggregate silo is equipped with a metering belt scale whose speed can be intelligently adjusted. The control of the metering belt scale is shown in Figure 15, which can realize continuous metering of aggregates, accurate metering, high precision, and has a material shortage alarm function. The cement silo and fly ash silo are equipped with a weighing screw machine, which is equipped with a precise weighing sensor. The control of the weighing screw machine is shown in Figure 15, which can measure continuously and have high measurement accuracy. The electric regulating valve of the water supply system and the electric regulating valve of the liquid agent system can be adjusted in real time according to the feedback signal of the flow meter to realize continuous metering with high measurement accuracy. The control of the water supply system and the liquid agent system is shown in Figure 16. Through the flow control of the aggregate silo, fly ash silo, water supply system and liquid agent system, the precise proportioning can be realized and the production can be continuously automated.

The stone crusher of this embodiment can be used alone to complete the stone crushing operation. At the same time, the combination of the screening system and the mixer can complete the mixing operation for relatively small particle aggregates.

FIG. 2 is a structural block diagram of the cemented sand and gravel mixing equipment in Embodiment 1. The cemented sand and gravel mixing equipment shown in Fig. 2 carries out the method for cemented sand and gravel mixing, including:

(1), the feeder 1 feeds the gravel into the crusher 2;

(2) Crusher 2 crushes sand and gravel, and the obtained aggregate is transported to the screening machine 4 through the first aggregate conveying belt 3;

(3) The screening machine 4 sieves the aggregates to obtain aggregates with qualified diameters, which are transported to the aggregate batching system through the second aggregate conveying belt 5, and aggregates with unqualified diameters are returned through the fourth aggregate conveying belt Go to Crusher 2 for reprocessing;

(4) Aggregate with a qualified diameter is sent to the mixer 9 after the aggregate batching system, the control system 22 controls the batching of the aggregate batching system;

(5), the control system 22 controls the liquid agent system 17 and the water supply system 21 to work, and sends liquid agent and water to the mixer 9;

(6), the fly ash in the fly ash bin 18 enters the mixer 9 through the fly ash screw conveyor 19, and the cement in the cement bin 14 enters the mixer 9 through the cement screw conveyor 15;

(7) The mixer 9 stirs to obtain the finished product, which is transported to the finished product storage bin 13 through the finished product conveying system.

Example 2

In this embodiment, the cemented sand and gravel mixing equipment adopts the U-shaped arrangement shown in Figure 17, which has the advantages of saving space, facilitating assembly, and improving efficiency. As shown in Figure 18, the mixing drum is placed horizontally, and the transmission mode is a combination of gear transmission and friction wheel transmission, which combines the advantages of high efficiency of gear transmission and stability of friction wheel.

The aggregate batching system includes an aggregate bin 6 and an aggregate metering belt 7, the inlet of the aggregate bin 6 is connected to the second aggregate conveying belt 5, the outlet of the aggregate bin 6 is connected to one end of the aggregate metering belt 7, and the other end of the aggregate metering belt 7 One end is connected to the aggregate conveyor belt 8. All the other parts are identical with embodiment 1. Aggregate bin 6 is supported on the foundation with a steel structure frame, and is a front-end automatic batching equipment used in conjunction with the mixer. It can be used for the designed ratio of cemented sand and gravel, and automatically complete the batching program of sand, stone, cement and other materials. The PLD series aggregate machine is used for the preparation of cemented sand and gravel. The PLD series aggregate machine can be equipped with four types. Aggregate is measured by an electronic scale and automatically controlled by a batching program controller. It has the characteristics of high batching accuracy, strong adaptability, easy operation, reliable use, and simple and intuitive structure. The prepared aggregate output from the outlet of the aggregate bin 6 is weighed and measured by the aggregate weighing belt 7 and then transferred to the third aggregate conveyor belt 8, and then transferred to the mixer 9 for mixing. The upper part of the aggregate bin 6 is a cuboid structure, and the lower part is a cone structure. The cone mouth is matched with the aggregate weighing belt 7. There is a pressure reducing plate inside the aggregate bin 6, and a material door is provided at the cone mouth to adjust the size of the aggregate outlet. , adjust the production volume according to the production situation. The aggregate bin 6 is also equipped with a vibrator to prevent the blockage of the outlet and make the production continuous and feasible. Aggregate metering belt 7 is continuous metering, on which a material shortage alarm is provided.

Fig. 3 is a structural block diagram of the cemented sand and gravel mixing equipment of embodiment 2. The cemented sand and gravel mixing equipment shown in Fig. 3 carries out the method for cemented sand and gravel mixing, including:

(1), the feeder 1 feeds the gravel into the crusher 2;

(2) Crusher 2 crushes sand and gravel, and the obtained aggregate is transported to the screening machine 4 through the first aggregate conveying belt 3;

(3) The screening machine 4 sieves the aggregates to obtain aggregates with qualified diameters, which are transported to the aggregate batching system through the second aggregate conveying belt 5, and aggregates with unqualified diameters are returned through the fourth aggregate conveying belt Go to Crusher 2 for reprocessing;

(4) Aggregate with a qualified diameter is sent to the aggregate bin 6, and the aggregate in the aggregate bin 6 falls to the aggregate weighing belt 7 for metering and batching, and then is sent to the mixer 9 through the third aggregate conveyor belt 8;

(5), the control system 22 controls the liquid agent system 17 and the water supply system 21 to work, and sends liquid agent and water to the mixer 9;

(6), the fly ash in the fly ash bin 18 enters the mixer 9 through the fly ash screw conveyor 19, and the cement in the cement bin 14 enters the mixer 9 through the cement screw conveyor 15;

(7) The mixer 9 stirs to obtain the finished product, which is transported to the finished product storage bin 13 through the finished product conveying system.

Example 3

In this embodiment, the finished product conveying system includes a material guide trough 10 and a finished product belt conveyor 11, one end of the material guide trough 10 cooperates with the mixer 9, the other end of the material guide trough 10 cooperates with one end of the finished product belt conveyor 11, and the other end of the finished product belt conveyor 11 Cooperate with finished product storage bin 13. All the other parts are identical with embodiment 1.

Fig. 4 is a structural block diagram of the cemented sand and gravel mixing equipment of embodiment 3. The cemented sand and gravel mixing equipment shown in Fig. 4 carries out the method for cemented sand and gravel mixing, including:

(1), the feeder 1 feeds the gravel into the crusher 2;

(2) Crusher 2 crushes sand and gravel, and the obtained aggregate is transported to the screening machine 4 through the first aggregate conveying belt 3;

(3) The screening machine 4 sieves the aggregates to obtain aggregates with qualified diameters, which are transported to the aggregate batching system through the second aggregate conveying belt 5, and aggregates with unqualified diameters are returned through the fourth aggregate conveying belt Go to Crusher 2 for reprocessing;

(4) Aggregate with a qualified diameter is sent to the mixer 9 after the aggregate batching system, the control system 22 controls the batching of the aggregate batching system;

(5), the control system 22 controls the liquid agent system 17 and the water supply system 21 to work, and sends liquid agent and water to the mixer 9;

(6), the fly ash in the fly ash bin 18 enters the mixer 9 through the fly ash screw conveyor 19, and the cement in the cement bin 14 enters the mixer 9 through the cement screw conveyor 15;

(7) The finished product is obtained by stirring with the mixer 9 , and then reaches the finished product belt conveyor 11 through the material guide trough 10 , and is transported to the finished product storage bin 13 .

Example 4

In this embodiment, the aggregate batching system includes an aggregate bin 6 and an aggregate metering belt 7, the inlet of the aggregate bin 6 is connected to the second aggregate conveying belt 5, the outlet of the aggregate bin 6 is connected to one end of the aggregate metering belt 7, and the aggregate The other end of the metering belt 7 is connected to the third aggregate conveyor belt 8; the finished product conveying system includes a material guide trough 10 and a finished product belt conveyor 11, one end of the material guide trough 10 is matched with the mixer 9, and the other end of the material guide trough 10 is connected with the finished product belt conveyor 11 One end cooperates, and the other end of finished product belt conveyor 11 cooperates with finished product storage bin 13. All the other parts are identical with embodiment 1.

Fig. 5 is a structural block diagram of the cemented sand and gravel mixing equipment of embodiment 4. The cemented sand and gravel mixing equipment shown in Fig. 5 carries out the method for cemented sand and gravel mixing, including:

(1), the feeder 1 feeds the gravel into the crusher 2;

(2) Crusher 2 crushes sand and gravel, and the obtained aggregate is transported to the screening machine 4 through the first aggregate conveying belt 3;

(3) The screening machine 4 sieves the aggregates to obtain aggregates with qualified diameters, which are transported to the aggregate batching system through the second aggregate conveying belt 5, and aggregates with unqualified diameters are returned through the fourth aggregate conveying belt Go to Crusher 2 for reprocessing;

(4) Aggregate with a qualified diameter is sent to the aggregate bin 6, and the aggregate in the aggregate bin 6 falls to the aggregate weighing belt 7 for metering and batching, and then is sent to the mixer 9 through the third aggregate conveyor belt 8;

(5), the control system 22 controls the liquid agent system 17 and the water supply system 21 to work, and sends liquid agent and water to the mixer 9;

(6), the fly ash in the fly ash bin 18 enters the mixer 9 through the fly ash screw conveyor 19, and the cement in the cement bin 14 enters the mixer 9 through the cement screw conveyor 15;

(7) The finished product is obtained by stirring with the mixer 9 , and then reaches the finished product belt conveyor 11 through the material guide trough 10 , and is transported to the finished product storage bin 13 .

The cemented sand and gravel mixing equipment of the present invention integrates the function of crushing stone, screening function and stirring function, expands production capacity, reduces production cost, improves automation level, improves production efficiency and quality, and greatly enhances the The reliability and service life of the mixing equipment are improved. At the same time, the system as a whole adopts a non-foundation design with a reasonable structure, which is convenient for disassembly, transportation, maintenance and assembly, rapid construction, and is suitable for various complex terrains. In addition, each part of the equipment can be used alone or combined for production, which greatly improves the production capacity and equipment use efficiency, and improves the functionality of the system.

Claims (9)

1. A cemented sand and gravel mixing equipment, characterized in that it includes: a feeder (1), a crusher (2), a screening machine (4), an aggregate batching system, a mixer (9), and an air system (12), finished product conveying system, finished product storage bin (13), cement bin (14), liquid agent system (17), fly ash bin (18), water supply system (21), control system (22); The feeder (1) is connected to the inlet of the crusher (2), the outlet of the crusher (2) is connected to the inlet of the screening machine (4) through the first aggregate conveying belt (3), and the outlet of the screening machine (4) passes through the first The second aggregate conveyor belt (5) is connected to one end of the aggregate batching system, the other end of the aggregate batching system is connected to the mixer (9) through the third aggregate conveyor belt (8), and the cement silo (14) passes through the cement screw conveyor in turn (15), the cement weighing screw machine (16) is connected to the mixer (9), and the fly ash bin (18) is sequentially connected to the fly ash screw conveyor (19) and the fly ash weighing screw machine (20) The mixer (9), the mixer (9) is connected to the finished product storage bin (13) through the finished product conveying system; The liquid agent system (17) and the water supply system (21) are respectively connected to the mixer (9), and the control system (22) is connected to the aggregate batching system, the cement silo (14), the liquid agent system (17), and the fly ash silo (18 ), the water supply system (21), and the gas system (12) are respectively connected to the fly ash silo (18), the cement silo (14) and the finished product storage silo (13). 2. The cemented sand and gravel mixing equipment according to claim 1, characterized in that the aggregate batching system includes an aggregate bin (6) and an aggregate weighing belt (7), and the inlet of the aggregate bin (6) is connected The second aggregate conveyor belt (5), the outlet of the aggregate bin (6) is connected to one end of the aggregate weighing belt (7), and the other end of the aggregate weighing belt (7) is connected to the third aggregate conveyor belt (8). 3. The cemented sand and gravel mixing equipment according to claim 1, characterized in that, the finished product conveying system includes a material guide trough (10), a finished product belt conveyor (11), and one end of the material guide trough (10) is connected to the mixer ( 9) Cooperate, the other end of the guide groove (10) cooperates with one end of the finished product belt conveyor (11), and the other end of the finished product belt conveyor (11) cooperates with the finished product storage bin (13). 4. The cemented sand and gravel mixing equipment according to claim 1, characterized in that the aggregate batching system includes an aggregate bin (6) and an aggregate weighing belt (7), and the inlet of the aggregate bin (6) is connected The second aggregate conveyor belt (5), the outlet of the aggregate bin (6) is connected to one end of the aggregate weighing belt (7), and the other end of the aggregate weighing belt (7) is connected to the third aggregate conveyor belt (8); The finished product conveying system includes a material guide trough (10), a finished product belt conveyor (11), one end of the material guide trough (10) cooperates with the mixer (9), and the other end of the material guide trough (10) is connected with the finished product belt conveyor (11). Cooperate, the other end of finished product belt conveyor (11) cooperates with finished product storage bin (13). 5. The cemented sand and gravel mixing equipment according to any one of claims 1, 3, and 4, characterized in that, the mixer (9) adopts an assembled mixing drum, and the assembled mixing drum is a three-stage type, The sections are fitted and connected, and two joints form a raceway respectively. 6. The cemented sand and gravel mixing equipment of claim 1 carries out the method for cemented sand and gravel mixing, characterized in that, comprising: The feeder (1) feeds the gravel into the crusher (2); The stone crusher (2) crushes the sand and gravel, and the obtained aggregate is transported to the screening machine (4) through the first aggregate conveying belt (3); The screening machine (4) screens the aggregates to obtain aggregates with qualified diameters, which are transported to the aggregate batching system through the second aggregate conveying belt (5), and aggregates with unqualified diameters are returned through the fourth aggregate conveying belt to the stone crusher (2) for reprocessing; Aggregate with a qualified diameter is fed into the mixer after the control system (22) controls the batching of the aggregate batching system (9). ; The control system (22) controls the liquid agent system (17) and the water supply system (21) to work, and sends liquid agent and water to the mixer (9); The fly ash in the fly ash silo (18) enters the mixer (9) through the fly ash screw conveyor (19), and the cement in the cement silo (14) enters the mixer (9) through the cement screw conveyor (15); The mixer (9) stirs to obtain the finished product, which is transported to the finished product storage bin (13) through the finished product conveying system. 7. The cemented sand and gravel mixing equipment according to claim 2 is characterized in that, comprising: The feeder (1) feeds the gravel into the crusher (2); The stone crusher (2) crushes the sand and gravel, and the obtained aggregate is transported to the screening machine (4) through the first aggregate conveying belt (3); The screening machine (4) screens the aggregates to obtain aggregates with qualified diameters, which are transported to the aggregate batching system through the second aggregate conveying belt (5), and aggregates with unqualified diameters are returned through the fourth aggregate conveying belt to the stone crusher (2) for reprocessing; Aggregate with a qualified diameter is sent to the aggregate bin (6), and the aggregate in the aggregate bin (6) falls to the aggregate weighing belt (7) for weighing and batching, and then is sent to the mixer through the third aggregate conveyor belt (8) (9); The control system (22) controls the liquid agent system (17) and the water supply system (21) to work, and sends liquid agent and water to the mixer (9); The fly ash in the fly ash silo (18) enters the mixer (9) through the fly ash screw conveyor (19), and the cement in the cement silo (14) enters the mixer (9) through the cement screw conveyor (15); The mixer (9) stirs to obtain the finished product, which is transported to the finished product storage bin (13) through the finished product conveying system. 8. The cemented sand and gravel mixing equipment according to claim 3 is characterized in that, comprising: The feeder (1) feeds the gravel into the crusher (2); The stone crusher (2) crushes the sand and gravel, and the obtained aggregate is transported to the screening machine (4) through the first aggregate conveying belt (3); The screening machine (4) screens the aggregates to obtain aggregates with qualified diameters, which are transported to the aggregate batching system through the second aggregate conveying belt (5), and aggregates with unqualified diameters are returned through the fourth aggregate conveying belt to the stone crusher (2) for reprocessing; Aggregate with a qualified diameter passes through the aggregate batching system, and the control system (22) controls the batching of the aggregate batching system and then sends it to the mixer (9); The control system (22) controls the liquid agent system (17) and the water supply system (21) to work, and sends liquid agent and water to the mixer (9); The fly ash in the fly ash silo (18) enters the mixer (9) through the fly ash screw conveyor (19), and the cement in the cement silo (14) enters the mixer (9) through the cement screw conveyor (15); The mixer (9) stirs to obtain the finished product, which reaches the finished product belt conveyor (11) through the material guide groove (10), and is transported to the finished product storage bin (13). 9. The cemented sand and gravel mixing equipment of claim 4 carries out the method for cemented sand and gravel mixing, characterized in that, comprising: The feeder (1) feeds the gravel into the crusher (2); The stone crusher (2) crushes the sand and gravel, and the obtained aggregate is transported to the screening machine (4) through the first aggregate conveying belt (3); The screening machine (4) sieves the aggregates to obtain aggregates with qualified diameters, which are transported to the aggregate batching system through the second aggregate conveying belt (5), and aggregates with unqualified diameters are returned to the aggregate batching system through the fourth aggregate conveying belt. Crusher (2) for reprocessing; Aggregate with a qualified diameter is sent to the aggregate bin (6), and the aggregate in the aggregate bin (6) falls to the aggregate weighing belt (7) for weighing and batching, and then is sent to the mixer through the third aggregate conveyor belt (8) (9); The control system (22) controls the liquid agent system (17) and the water supply system (21) to work, and sends liquid agent and water to the mixer (9); The fly ash in the fly ash silo (18) enters the mixer (9) through the fly ash screw conveyor (19), and the cement in the cement silo (14) enters the mixer (9) through the cement screw conveyor (15); The mixer (9) stirs to obtain the finished product, which reaches the finished product belt conveyor (11) through the material guide groove (10), and is transported to the finished product storage bin (13).