CN114887718A - Gravel grinding machine for shaping machine-made aggregate - Google Patents

Abstract

The invention provides a gravel mill for shaping machine-made aggregates, which comprises a gravel mill shell and a rotary drum machine, wherein the rotary drum machine body consists of an outer cylinder mesh enclosure, one end of the rotary drum machine is provided with a feed inlet, the other end of the rotary drum machine is provided with a rotating shaft, two sides of the annular machine body of the rotary drum machine are connected with the feed inlet and the rotating shaft through conical cylinder bodies, two ends of the rotary drum machine are rotatably connected with the gravel mill shell, the feed inlet is communicated with the interior of the rotary drum machine body, an inner cylinder mesh with an annular structure is further arranged in the rotary drum machine body, a plurality of openings are formed in the inner cylinder mesh, guide plates are arranged on the openings, one end of each guide plate is connected with one side of the opening of the inner cylinder mesh, and the other end of each guide plate is abutted against the interior of the outer cylinder mesh enclosure. The grain shape of the shaped product is better, so that the fluidity of the ready-mixed concrete is improved, the water consumption of the unit volume of the concrete and the consumption of the cementing material are reduced, and the performance of the concrete is enhanced.

Description

Pebble mill for reshaping machine aggregates

technical field

The invention relates to the field of mechanism aggregate shaping, in particular to a pebble mill for shaping mechanism aggregates.

Background technique

Aggregate (also known as aggregate) is an essential raw material for the production of concrete, accounting for about 70% of the concrete volume and has a crucial impact on concrete performance. Aggregates can be divided into natural aggregates and mechanical aggregates according to their sources, and coarse aggregates and fine aggregates (4.75~0.15mm) according to their particle size. Fine aggregates are also called aggregates. With the tightening of natural aggregate resource constraints and increasing environmental protection, machine-made aggregates have replaced natural aggregates as the most important source of aggregates in the construction market.

On the whole, mechanical aggregates have outstanding problems such as poor particle shape, which have many negative effects on concrete performance, such as increased void ratio, decreased compaction, decreased slurry workability and durability, and cementitious materials. The increase in usage, etc., not only increases the difficulty of construction and the cost of use, but also threatens the structural safety of construction projects.

The existing mechanism of aggregate shaping is usually carried out by impact crusher and impact crusher, which can achieve a certain shaping effect to a certain extent. Impact crusher and impact crusher use high-strength metal or non-metallic components to impact the aggregate, so that the aggregate forms a violent collision on the striking component and the wall of the equipment, and the collision between the aggregate and the component or between the aggregate Preferential fragmentation of tips or edges is formed during the process, resulting in improved aggregate particle shape.

This kind of shaping equipment relies on violent random collision to achieve shaping effect. Due to the different types, contents and mineralization properties of aggregate particles, its strength is not uniform. In the violent collision, not only the edges and corners will be fragmented, but the ore as a whole may also be cracked, causing large particles to be cracked into multiple small particles, and even cracks may be formed inside the particles. The ore has been crushed and a large amount of stone powder with low economic value is produced. Therefore, if it is necessary to achieve the proper shaping effect and reduce the over-crushing phenomenon, the severe impact and collision shaping method has major defects.

Chinese patent "CN212596087U" is a rod mill aggregate equipment, which includes: rod mill, separation device, support frame and motor, one side of the support frame is provided with a material guide frame, the material guide frame is provided with a separation device, and the support frame The top of one side is provided with a protective cover, the protective cover is communicated with the discharge port of the separation device through the material guide frame, the top of the other side of the support frame is provided with a bayonet, and the feeding end of the rod mill can be rotatably set in the protective cover. The discharge end of the machine is rotatably arranged on the bayonet, the motor is arranged in the support frame, the output end of the motor is provided with a rotating rod, the rotating rod is provided with a first gear, and the outer surface of the rod mill is provided with a first gear that can mesh with the first gear. the second gear. When the whole mechanism rotates, the shaping effect is poor, the structure is complex, and the use is relatively difficult.

Chinese patent "CN215942547U" is a mechanism aggregate shaping device, which relates to the technical field of mechanism aggregate processing devices, including a worktable, the upper surface of the worktable is fixed with a shaping machine through a support, and the shaping machine includes a lower end The housing is fixedly connected with the support, and the motor is fixedly installed on one side of the housing. The output shaft of the motor penetrates the housing wall and is rotatably connected to the housing wall through a bearing embedded in the housing wall. The end of the output shaft is coaxially and fixedly connected with a roller. The outer wall of the rotating shell has no protective equipment, and it is prone to splashing during grinding. As a result, the internal aggregate is not completely polished and leaks from the outer wall of the rotating shell, resulting in poor grinding effect.

SUMMARY OF THE INVENTION

In view of the generally bad grain shape of the commercially available machine-made aggregate products, there are still many deficiencies in the machine-made aggregate shaping equipment, especially the impact crusher and impact crusher which are widely used do not have a good shaping effect and are easy to use due to severe impact collision. Problems such as crushing occurred.

The invention provides a shaping device which can achieve suitable shaping effect and reduce over-crushing. The technical scheme adopted in the present invention is as follows: a pebble mill for shaping mechanism aggregates, the pebble mill comprises a shell of the pebble mill and a drum machine, the middle of the drum machine body is covered with an outer cylinder mesh cover, and the drum machine One end of the drum machine is provided with a feeding port, and the other end is provided with a rotating shaft. Connected, the feeding port is communicated with the inside of the drum machine body, and the drum machine body is also provided with an inner cylinder net with a ring structure. The inner cylinder net is provided with a plurality of openings. One side of the opening of the inner cylinder net is connected, and the other end is pressed against the inside of the outer cylinder net cover.

In a preferred solution, a plurality of material guide plates are arranged in a uniform array along the axis of the drum machine, and the material guide plates are arranged obliquely.

In a preferred solution, both ends of the inner cylinder net are connected to the conical cylinders on both sides of the drum machine, and a plurality of protruding lifting plates are arranged inside the inner cylinder net.

In a preferred solution, a plurality of reinforcing bars are provided on the drum machine, the conical cylinders on both sides of the annular body of the drum machine are connected by the reinforcing bars, and the outer surface of the net cover of the outer drum abuts on the reinforcing bars.

In a preferred solution, the reinforcing bar includes a first reinforcing bar and a second reinforcing bar, a discharge port is provided on the drum machine, and two first reinforcing bars are arranged on both sides of the discharge port.

In a preferred solution, the discharge port is also provided with a door plate, and the inner side wall of the first reinforcing strip is also provided with a plurality of bayonet openings. It is arranged inside the bayonet, and the nut passes through the pressing plate and is threadedly connected to the shell of the drum machine.

In a preferred solution, a handle is provided on the door panel.

In a preferred solution, a protective cover is arranged above the shell of the pebble mill, a lower hopper is arranged under the shell of the pebble mill, and a transparent observation port is also arranged on the shell of the pebble mill.

In a preferred solution, the feeding port of the rotary drum machine is set on one side of the shell of the pebble mill, the shell side of the pebble mill is provided with a feeding hopper, the lower end of the feeding hopper is provided with a feeding trough, and the feeding hopper is set on the mobile side. On the frame, there are multiple universal wheels under the moving frame, and the feeding hopper moves through the moving frame, so that the feeding groove of the feeding hopper extends from the feeding port to the inside of the drum machine.

In the preferred solution, the shell of the pebble mill is arranged on the support frame, and one side of the support frame is also provided with a side support table. The side support table is provided with a gear box and a drive motor. The rotating shaft is connected with the gear box through the transmission belt;

An electric control box is also arranged on the other side of the shell of the pebble mill, and the electric control box is electrically connected with the driving motor.

The invention provides a pebble mill for shaping machine-made aggregates. According to the properties of the ore, an appropriate cylinder diameter and rotational speed are selected to ensure the weak impact and abrasion strength of the aggregate particles in the cylinder, and can greatly reduce the crushing of the aggregate particles. It is broken into small particles, so that the shaping time can be appropriately extended. Make the aggregate particles achieve better sphericity, reduce the edges and corners of the aggregate particles, and improve the surface smoothness of the aggregate particles. Relying on the impact and abrasion between aggregate particles, there is no need to add other grinding media, reducing the impact and crushing of the media on the aggregate particles, ensuring the shaping effect, and greatly reducing energy consumption and material consumption. Double-layer forced grading on the inner and outer cylinder walls: the large-grained materials in the pebble mill have greater gravitational potential energy, and the small-grained materials are more easily broken and eroded, which can effectively improve the shaping quality and shaping efficiency of the machine-made aggregates, so as to obtain a better grain shape. It can improve the fluidity of the slurry, reduce the water consumption per unit volume and the amount of cementitious materials, and improve the workability and durability of concrete.

Description of drawings

Below in conjunction with accompanying drawing and embodiment, the present invention will be further described:

Fig. 1 is the overall structure diagram of the present invention;

Fig. 2 is the open structure diagram of the protective cover of the present invention;

Fig. 3 is the front sectional structure diagram of the present invention;

Fig. 4 is the appearance structure diagram of the rotary drum machine of the present invention;

Fig. 5 is the installation structure diagram of the inner cylinder net inside the drum machine of the present invention;

In the figure: protective cover 1; feeding hopper 2; electric control box 3; moving frame 4; universal wheel 401; Support table 8; drive motor 9; belt protection cover 10; drum machine 11; feeding port 1101; outer cylinder net cover 1102; first reinforcing strip 1103; bayonet 1104; The cylinder net 1107; the lifting plate 1108; the second reinforcing strip 1104; the transmission belt 12; the door panel 13;

Detailed ways

Example 1

As shown in Figures 1 to 4, a pebble mill for shaping mechanism aggregates, the pebble mill includes a pebble mill shell 5 and a drum machine 11, and the middle of the drum machine 11 is covered with an outer cylinder mesh cover 1102, one end of the drum machine 11 is provided with a feeding port 1101, and the other end is provided with a rotating shaft. The end is rotatably connected with the shell 5 of the pebble mill, the feed port 1101 is communicated with the inside of the drum machine 11, and the drum machine 11 is also provided with an inner cylinder net 1107 of annular structure, and the inner cylinder net 1107 is provided with a plurality of The opening is provided with a material guide plate 1106 , one end of the material guide plate 1106 is connected to the opening side of the inner cylinder net 1107 , and the other end abuts against the inside of the outer cylinder net cover 1102 . Particles with a particle size smaller than 4.75mm pass through the small holes on the inner cylinder net 1107, leave the shaping area of the inner cylinder mesh 1107, and enter the classification area between the outer cylinder mesh cover 1102 and the inner cylinder mesh 1107. Particles with a particle size smaller than 4.75mm are screened and classified in the classification area, and particles smaller than the screen size of the outer cylinder mesh cover 1102 are discharged out of the cylinder. Particles larger than the screen size of the outer cylinder mesh cover 1102 are guided by the material guide plate 1106 to return to the shaping area inside the inner cylinder mesh 1107 again.

In a preferred solution, a plurality of material guide plates 1106 are arranged in a uniform array along the axis of the drum machine 11, and the material guide plates 1106 are arranged obliquely. The inclined setting of the material guide plate 1106 is convenient for the particles to be guided to the inside of the inner cylinder net 1107 for shaping.

In a preferred solution, both ends of the inner cylinder net 1107 are connected to the conical cylinders on both sides of the drum machine 11 , and a plurality of protruding lifting plates 1108 are provided inside the inner cylinder net 1107 . A large amount of aggregate is stored between the adjacent lifting plates 1108. With the rotation of the drum machine 11, the aggregate between the adjacent lifting plates 1108 is lifted to a certain height and then thrown down, so that the material is separated from the material or the drum. Weak impact and mutual friction are formed between the bodies.

In a preferred solution, the drum machine 11 is provided with a plurality of reinforcing bars, the conical cylinders on both sides of the annular body of the drum machine 11 are connected by the reinforcing bars, and the outer surface of the outer cylinder net cover 1102 abuts on the reinforcing bars. The reinforcing bars include a first reinforcing bar 1103 and a second reinforcing bar 1104 , a discharge port 1105 is provided on the drum machine 11 , and two first reinforcing bars 1103 are provided on both sides of the discharge port 1105 . The first reinforcement strip 1103 and the second reinforcement strip 1104 strengthen the rigid structure of the entire drum machine 11 .

In a preferred solution, the discharge port 1105 is further provided with a door plate 14, the inner side wall of the first reinforcing strip 1103 is also provided with a plurality of bayonet openings 1104, and both sides of the door plate 14 are pressed on the discharge port 1105 by a plurality of pressing plates 14, One end of the pressing plate 14 is pressed on the door plate 14 , and the other end is arranged inside the bayonet 1103 , and the nut passes through the pressing plate 14 and is threadedly connected to the casing of the drum machine 11 . When installing the pressure plate 14, first insert the pressure plate 14 into the bayonet 1103 to stabilize the pressure plate 14, and the pressure plate 14 will not fall off easily, which is convenient to fix the entire door panel 14 and then lock it with a nut.

In a preferred solution, a handle 1301 is provided on the door panel 14 . It is convenient to install and remove the door panel 14.

In a preferred solution, a protective cover 1 is provided above the pebble mill shell 5 , a lower hopper 502 is disposed below the pebble mill shell 5 , and a transparent observation port 501 is further provided on the pebble mill shell 5 . The protective cover 1 prevents materials from splashing on the drum machine 11 , and the observation port 501 is convenient for observing the inside of the shell 5 of the pebble mill.

In a preferred solution, the feeding port 1101 of the rotary drum machine 11 is provided on the side of the shell 5 of the pebble mill, the shell 5 of the pebble mill is provided with a feeding hopper 2, and the lower end of the feeding hopper 2 is provided with a feeding slot 201 , the feeding hopper 2 is set on the moving frame 4, and a plurality of universal wheels 401 are arranged under the moving frame 4. The feeding hopper 2 moves through the moving frame 4, so that the feeding chute 201 of the feeding hopper 2 is moved from the feeding port 1101 Protrudes into the drum machine 11 . Move the feeding hopper 2 to the position of the feeding port 1101 on the side of the shell 5 of the pebble mill, and the feeding groove 201 of the feeding hopper 2 extends into the interior of the feeding port 1101 .

In the preferred solution, the shell 5 of the pebble mill is arranged on the support frame 7, and a side support table 8 is also arranged on one side of the support frame 7. The side support table 8 is provided with a gear box 6 and a drive motor 9. The box 6 is connected, the rotating shaft at the other end of the drum machine 11 is connected with the gear box 6 through the transmission belt 12, the other side of the pebble mill shell 5 is also provided with an electric control box 3, and the electric control box 3 is connected with the drive motor 9 electrical connection. The drive motor 9 drives the entire drum machine 11 to rotate through the gear box 6, and the electric control box 3 controls the drive motor 9 to rotate forward and reverse.

Example 2

Further description in conjunction with Example 1, as shown in Figures 1-5, in order to prevent the loss of aggregate particles caused by over-grinding, in the process of shaping, forced classification through the sieve holes of the inner and outer cylinder walls, and small particles that can pass through the sieve holes of the outer cylinder. Timely discharge, greatly reducing the fragmentation and over-grinding of small particle materials. Medium-sized particles that can pass through the sieve hole of the inner cylinder but larger than the sieve hole of the outer cylinder circulate in the shaping area of the inner cylinder and the classification area of the outer cylinder. The action time in the shaping area ensures shaping while reducing fragmentation and over-crushing. Set up inner and outer double-layer cylinder walls, the inner cylinder sieve size is larger, and the outer cylinder sieve size is smaller. The material needs to pass through the inner cylinder sieve first before entering the outer cylinder grading area to prevent excessive particles from violently affecting the outer screen. Impact, protect the service life of the outer screen.

According to the different feeding particle size of the aggregate particles and the target shaping effect, set the appropriate lifting plate and cylinder speed to ensure the shaping effect and reduce over-crushing. There is a power device to drive the cylinder on the frame to rotate counterclockwise, the material enters the cylinder from the feeding port from the feeding chute, and the material rotates with the cylinder under the friction and pushing action of the inner cylinder net 1107 and the lifting plate 1108, and rotates and lifts. After reaching a certain height, it will be thrown down, causing weak impact and mutual friction between the material and the material or the cylinder. Through weak impact and friction, the edges and corners of the material are impacted and eroded, thereby changing the shape of the aggregate particles, achieving a better particle shape, and reducing the content of needle-like particles and irregular particles in the aggregate particles.

Particles with a particle size smaller than 4.75mm pass through the small holes on the inner cylinder net 1107, leave the shaping area of the inner cylinder mesh 1107, and enter the classification area between the outer cylinder mesh cover 1102 and the inner cylinder mesh 1107. Particles with a particle size smaller than 4.75mm are screened and classified in the classification area, and particles smaller than the screen size of the outer cylinder mesh cover 1102 are discharged out of the cylinder. Particles larger than the screen size of the outer cylinder mesh cover 1102 are guided by the material guide plate 1106 to return to the shaping area inside the inner cylinder mesh 1107 again.

The above-mentioned embodiments are only the preferred technical solutions of the present invention, and should not be regarded as limitations of the present invention. The protection scope of the present invention should be based on the technical solutions recorded in the claims, including the equivalents of the technical features in the technical solutions recorded in the claims. The alternative is protection scope. That is, equivalent replacements and improvements within this scope are also within the protection scope of the present invention, and the shaping of other solids such as tailings is also included in the protection scope of the present invention.

Claims (10)

1. A pebble mill for shaping mechanism aggregates, characterized in that: the pebble mill comprises a pebble mill shell (5) and a drum machine (11), and the middle of the drum machine (11) body is covered with The outer cylinder mesh cover (1102), one end of the drum machine (11) is provided with a feeding port (1101), and the other end is provided with a rotating shaft, the two sides of the ring body of the drum machine (11) pass through the conical cylinder and feed The port (1101) is connected with the rotating shaft, the two ends of the drum machine (11) are rotatably connected with the shell of the pebble mill (5), the feed port (1101) is communicated with the inside of the body of the drum machine (11), and the drum machine ( 11) There is also a ring-shaped inner cylinder net (1107) inside the body. The inner cylinder net (1107) is provided with a plurality of openings, and the openings are provided with a material guide plate (1106), one end of the material guide plate (1106) is connected to the inner The opening side of the cylinder net (1107) is connected, and the other end abuts against the inside of the outer cylinder mesh cover (1102). 2. A pebble mill for shaping machine-made aggregates according to claim 1, characterized in that: a plurality of guide plates (1106) are arranged in a uniform array along the axis of the drum machine (11), and the guide plates (1106) Tilt setting. 3. The pebble mill for shaping machine-made aggregates according to claim 1, characterized in that: both ends of the inner cylinder net (1107) are connected to the conical cylinders on both sides of the drum machine (11). , the inner cylinder net (1107) is provided with a plurality of protruding lifting plates (1108). 4. A pebble mill for shaping mechanism aggregates according to claim 1, characterized in that: the drum machine (11) is provided with a plurality of reinforcing bars, and both sides of the annular body of the drum machine (11) are provided with a plurality of reinforcing bars. The conical cylinders are connected by reinforcing strips, and the outer surface of the outer cylinder net cover (1102) abuts on the reinforcing strips. 5. The pebble mill for shaping mechanism aggregates according to claim 4, wherein the reinforcing bar comprises a first reinforcing bar (1103) and a second reinforcing bar (1104), and the drum machine (11 ) is provided with a discharge port (1105), and two first reinforcing strips (1103) are arranged on both sides of the discharge port (1105). 6. The pebble mill for shaping machine-made aggregates according to claim 5, characterized in that: the discharge port (1105) is further provided with a door plate (14), and the inner wall of the first reinforcing strip (1103) There are also a plurality of bayonet openings (1104) on both sides of the door panel (14), which are pressed on the discharge port (1105) by a plurality of pressure plates (14), one end of the pressure plate (14) is pressed on the door plate (14), and the other side is pressed against the door plate (14). One end is arranged inside the bayonet (1103), and the nut passes through the pressing plate (14) and is threadedly connected to the shell of the drum machine (11). 7. The pebble mill for shaping machine-made aggregates according to claim 6, wherein a handle (1301) is provided on the door panel (14). 8. A pebble mill for shaping mechanism aggregates according to claim 1, characterized in that: a protective cover (1) is provided above the pebble mill shell (5), and the pebble mill shell (5) is provided with a protective cover (1). ) is provided with a lower hopper (502), and a transparent observation port (501) is also provided on the shell (5) of the pebble mill. 9. A pebble mill for shaping mechanism aggregates according to claim 1, characterized in that: the feed port (1101) of the drum machine (11) is located in the shell (5)-1 of the pebble mill. A feeding hopper (2) is provided on one side of the shell (5) of the pebble mill, a feeding trough (201) is provided at the lower end of the feeding hopper (2), and the feeding hopper (2) is arranged on the moving frame (4). There are a plurality of universal wheels (401) under the moving frame (4), and the feeding hopper (2) is moved by the moving frame (4), so that the feeding trough (201) of the feeding hopper (2) is fed from the The mouth (1101) extends into the drum machine (11). 10. A pebble mill for shaping machine-made aggregates according to claim 1, characterized in that: the pebble mill shell (5) is arranged on the support frame (7), and one side of the support frame (7) There is also a side support table (8), a gear box (6) and a drive motor (9) are arranged on the side support table (8), the drive motor (9) is connected with the gear box (6), and the drum machine (11) The rotating shaft at the other end is connected with the gearbox (6) through the transmission belt (12); An electric control box (3) is also provided on the other side of the shell (5) of the pebble mill, and the electric control box (3) is electrically connected with the driving motor (9).

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