An impact crushing device with widely adjustable machine-sand-gravel ratio

Abstract

The present invention discloses an impact crushing device with a widely adjustable machine-sand-gravel ratio, comprising a crushing body, the crushing body being provided with a first material dropping channel and a second material dropping channel, the first material dropping channel being connected to a first feeding mechanism, and the second material dropping channel being connected to a second feeding mechanism; a rotor mechanism being provided in the crushing body, and a crushing chamber being provided on the outer side of the rotor mechanism; and a controller being provided, the controller being used to control the rotation speed of the rotor mechanism and the feeding speed of the first feeding mechanism and the second feeding mechanism respectively, so as to adjust the machine-sand-gravel ratio. The present invention obtains different feeding flow ratios by adjusting the feeding of the first feeding mechanism and the second feeding mechanism, and adjusts the collision state of the materials by adjusting the rotation speed of the rotor mechanism, so as to realize a widely controllable and adjustable machine-sand-gravel ratio, and obtain finished materials with different machine-sand-gravel ratios, and the finished materials can be directly applied to the processing of concrete, which can greatly improve the processing efficiency of concrete.

Description

Technical Field

[0001] The invention relates to the technical field of construction equipment, and in particular to an impact crushing device with a widely adjustable machine-sand-gravel ratio. Background Art

[0002] Concrete is abbreviated as "tóng", which is a general term for engineering composite materials that are made of aggregates bonded together by cementitious materials. The term concrete usually refers to cement as a cementitious material, sand and stone as aggregates; mixed with water (which may contain admixtures and additives) in a certain proportion, and then mixed to obtain cement concrete, also known as ordinary concrete. Concrete has abundant raw materials, low prices, simple production processes, high compressive strength, good durability, and a wide range of strength grades. These characteristics make it widely used.

[0003] Sand and gravel are indispensable in the processing of concrete. At present, impact crushers are widely used in the production of sand and gravel. Impact crushers are also called sand making machines. They are widely used in the medium and fine crushing of various hard and brittle materials such as various rocks, quartz stones, iron ore, concrete aggregates, etc. Its crushing forms are divided into "stone hitting stone" and "stone hitting iron". The existing impact crusher is mainly composed of a distribution hopper, a rotor protection cover, a rotor, an inner liner, a bottom plate and a crusher shell. The material dropping method is mainly realized in the following way: the material enters the distribution hopper, enters the high-speed rotating rotor through the center hole, and is fully accelerated and thrown out to form the first material flow; the first material flow directly collides with the crushing chamber to form "stone hitting iron"; the material is thrown out from the four sides of the outer side of the guide cone to form a second material flow, and the second material flow directly falls into the crushing chamber and collides with the first material flow in the crushing chamber to form a "stone hitting stone" crushing effect. Since the rotor speed of the existing impact crusher is fixed, the maximum particle size of the input raw materials is also fixed, and the ratio of machine sand to gravel in the finished material is fixed, the machine sand to gravel ratio cannot be adjusted over a wide range and it is difficult to meet the use requirements of concrete. Summary of the invention

[0004] The purpose of the present invention is to provide an impact crushing device with a widely adjustable machine-sand-gravel ratio, which solves the problem in the prior art that the machine-sand-gravel ratio cannot be adjusted in the impact crushing device, the ratio of machine-sand to gravel in the finished material is fixed, and it is difficult to meet the requirements for concrete use.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: an impact crushing device with a widely adjustable machine sand and gravel ratio, comprising a crushing body, the crushing body is provided with a first dropping channel and a second dropping channel, the first dropping channel is connected to a first feeding mechanism, and the second dropping channel is connected to a second feeding mechanism; a rotor mechanism is provided in the crushing body, a crushing chamber is provided on the outer side of the rotor mechanism, and the crushing body is provided with a discharge port connected to the crushing chamber; the first dropping channel is distributed in an annular shape on the outer side of the second dropping channel, the first dropping channel is connected to the crushing chamber, and the second dropping channel is connected to the inside of the rotor mechanism, the rotor mechanism is used to accelerate the material transported by the second dropping channel to throw it out to collide with the inner wall of the crushing chamber or collide and crush with the material transported into the crushing chamber by the first dropping channel; and also includes a controller, the rotor mechanism, the first feeding mechanism and the second feeding mechanism are all connected to the controller, and the controller is used to control the rotation speed of the rotor mechanism and the feeding speed of the first feeding mechanism and the second feeding mechanism respectively to adjust the machine sand and gravel ratio.

[0006] As an optional solution of the present invention, the first feeding mechanism includes a first conveyor belt, which is equipped with a first driving mechanism; the second feeding mechanism includes a second conveyor belt, which is equipped with a second driving mechanism, and the second driving mechanism and the first driving mechanism are both connected to the controller.

[0007] As an optional solution of the present invention, the controller is connected to a discharge control module for adjusting the machine-sand-gravel ratio. Based on the machine-sand-gravel ratio adjusted by the discharge control module, the controller controls the operation of the first drive mechanism and the second drive mechanism so that the first conveyor belt and the second conveyor belt feed at different speed ratios, and controls the rotation speed of the rotor mechanism to adjust the machine-sand-gravel ratio.

[0008] As an optional solution of the present invention, the first driving mechanism includes a first driving motor, a first active transmission wheel and a first driven transmission wheel, the first driving motor is connected to the controller, the output shaft of the first driving motor is connected to the first active transmission wheel, the first active transmission wheel and the first driven transmission wheel are connected through a first transmission belt, and the controller is used to control the rotation speed of the first driving motor so that the first transmission belt conveys materials to the first blanking channel at different speeds.

[0009] As an optional solution of the present invention, the second driving mechanism includes a second driving motor, a second active transmission wheel and a second driven transmission wheel, the second driving motor is connected to the controller, the output shaft of the second driving motor is connected to the second active transmission wheel, the second active transmission wheel and the second driven transmission wheel are connected through a second transmission belt, and the controller is used to control the rotation speed of the second driving motor so that the second transmission belt transports materials to the second blanking channel at different speeds.

[0010] As an optional solution of the present invention, a material guide is provided above the rotor mechanism, and the material guide is used to guide the material in the first material drop channel into the crushing chamber.

[0011] As an optional solution of the present invention, the material guide member includes a material guide cone, a first material guide cylinder is provided at the top of the material guide cone, and the first material drop channel is provided in the first material guide cylinder; a second material guide cylinder is provided at the bottom of the material guide cone, and the second material drop channel is provided in the second material guide cylinder.

[0012] As an optional solution of the present invention, the rotor mechanism includes an impeller, an impact block is installed on the impeller, the impeller is connected to a fixed seat, the fixed seat is connected to a third driving mechanism that drives it to rotate, and the third driving mechanism is connected to a controller.

[0013] As an optional solution of the present invention, the third driving mechanism includes a third driving motor, a driving pulley, a driven pulley and a synchronous belt, the output shaft of the third driving motor is connected to the driving pulley, the driving pulley and the driven pulley are connected through a synchronous belt, the driven pulley is connected to a crushing spindle, the end of the crushing spindle is connected to the fixed seat, and the controller is used to control the rotation speed of the third driving motor so that the material inside the impeller is thrown out at different speeds and collides and crushes with the material in the crushing chamber.

[0014] As an optional solution of the present invention, an impact liner is provided in the crusher body, and the impact liner is arranged in an annular shape on the side wall of the crushing chamber.

[0015] The beneficial effects of the present invention are:

[0016] The present invention provides an impact crushing device with a widely adjustable machine-sand-gravel ratio, wherein a rotor mechanism, a first feeding mechanism and a second feeding mechanism are all connected to a controller, and the controller is used to control the rotation speed of the rotor mechanism and the feeding speed of the first feeding mechanism and the second feeding mechanism respectively, so as to adjust the machine-sand-gravel ratio. The present invention obtains different feed flow ratios by adjusting the feed of the first feeding mechanism and the second feeding mechanism, and adjusts the material collision state by adjusting the rotation speed of the rotor mechanism, so that the machine-sand-gravel ratio can be controlled and adjusted in a wide range, and finished materials with different machine-sand-gravel ratios can be obtained, and the finished materials can be directly applied to the processing of concrete, which can greatly improve the processing efficiency of concrete. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a specific embodiment of the present invention;

[0018] Figure 2 It is a schematic diagram of the internal structure of a crushing machine body in a specific embodiment of the present invention.

[0019] In the figure: 1-crushing machine body; 2-first material dropping channel; 3-second material dropping channel; 4-first feeding mechanism; 5-second feeding mechanism; 6-crushing chamber; 7-discharging port; 8-material guide cone; 9-first material guide cylinder; 10-second material guide cylinder; 11-impeller; 12-impact block; 13-fixed seat; 14-third driving motor; 15-driving pulley; 16-driven pulley; 17-synchronous belt; 18-crushing main shaft; 19-impact liner. DETAILED DESCRIPTION

[0020] The existing impact crusher is mainly composed of a distribution hopper, a rotor protection cover, a rotor, an inner lining plate, a bottom plate and a crusher housing. The material dropping method is mainly realized in the following way: the material enters the distribution hopper, enters the high-speed rotating rotor through the center hole, and is fully accelerated and thrown out to form the first material flow; the first material flow directly collides with the crushing chamber to form a "stone hitting iron"; the material is thrown out from the four sides of the outer side of the guide cone to form a second material flow, and the second material flow directly falls into the crushing chamber and collides with the first material flow in the crushing chamber to form a "stone hitting stone" crushing effect. Since the rotor speed of the existing impact crusher is fixed, the maximum particle size of the input raw materials is also fixed, and the ratio of machine sand to crushed stone in the finished material is fixed, and the machine sand and crushed stone ratio cannot be adjusted in a wide range, which is difficult to meet the use requirements of concrete.

[0021] In order to solve the above problems, Figure 1 and Figure 2 As shown, the present invention provides an impact crushing device with a widely adjustable machine-sand-gravel ratio, comprising a crushing body 1, a first material drop channel 2 and a second material drop channel 3 are arranged on the top of the crushing body 1, the first material drop channel 2 is connected to a first feeding mechanism 4, and the second material drop channel 3 is connected to a second feeding mechanism 5. The first feeding mechanism 4 is used to transport materials to the first material drop channel 2, and the second feeding mechanism 5 is used to transport materials to the second material drop channel 3.

[0022] The crushing machine body 1 is provided with a rotor mechanism, and a crushing chamber 6 is provided on the outside of the rotor mechanism. The crushing machine body 1 is provided with a discharge port 7 connected to the crushing chamber 6, and the discharge port 7 is located at the bottom of the crushing chamber 6. The discharge port 7 is used to discharge the crushed material. The first drop channel 2 is distributed in an annular shape on the outside of the second drop channel 3, and the first drop channel 2 is connected to the crushing chamber 6, and the second drop channel 3 is connected to the inside of the rotor mechanism. The rotor mechanism is used to accelerate the material transported by the second drop channel 3 to collide with the inner wall of the crushing chamber 6 or collide with the material transported into the crushing chamber 6 by the first drop channel 2 to crush. The present invention is provided with a first drop channel 2 and a second drop channel 3, a first feed mechanism 4 and a second feed mechanism 5 respectively convey materials to the first drop channel 2 and the second drop channel 3, the materials of the first drop channel 2 enter the crushing chamber 6 and move downward, the materials of the second drop channel 3 enter the rotor mechanism and move laterally under the centrifugal action of the rotor mechanism, the laterally moving materials collide with the inner wall of the crushing chamber 6 and collide with the materials moving downward in the first drop channel 2, forming a crushing effect of "stone hitting stone" and "stone hitting iron". The present invention has a good crushing effect, a more uniform discharge, improves the working efficiency of the crushing device, and also effectively improves the service life of the crushing device, reducing the production and use costs.

[0023] The impact crushing device also includes a controller, and the rotor mechanism, the first feeding mechanism 4 and the second feeding mechanism 5 are all connected to the controller, and the controller is used to control the rotation speed of the rotor mechanism and the feeding speed of the first feeding mechanism 4 and the second feeding mechanism 5 respectively, so as to adjust the ratio of machine sand to gravel. The controller can independently control the rotation speed of the rotor mechanism, the feeding speed of the first feeding mechanism 4 and the feeding speed of the second feeding mechanism 5, and can realize a wide range of controllable and adjustable ratio of machine sand to gravel, so as to obtain machine sand and gravel that can meet the use requirements of concrete. The present invention obtains different feed flow ratios by adjusting the feeding of the first feeding mechanism 4 and the second feeding mechanism 5, and by adjusting the rotation speed of the rotor mechanism to adjust the collision state of the material, it can realize a wide range of controllable and adjustable ratio of machine sand to gravel, and can obtain finished materials with different ratios of machine sand to gravel, and the finished materials can be directly applied to the processing of concrete, which can greatly improve the processing efficiency of concrete, and solves the problem that the impact crushing device in the prior art cannot adjust the ratio of machine sand to gravel, and the ratio of machine sand to gravel in the finished materials is fixed, which is difficult to meet the use requirements of concrete.

[0024] like Figure 1As shown, specifically, the first feeding mechanism 4 includes a first conveyor belt, the first conveyor belt is equipped with a first driving mechanism, and the first driving mechanism is connected to a controller; the second feeding mechanism 5 includes a second conveyor belt, the second conveyor belt is equipped with a second driving mechanism, and the second driving mechanism is connected to the controller, and the controller is used to control the feeding speed of the first conveyor belt through the first driving mechanism, and control the feeding speed of the second conveyor belt through the second driving mechanism, so as to adjust the machine-sand-gravel ratio. The first conveyor belt and the second conveyor belt are fed at the same time. After the rotor mechanism accelerates the material, the transversely moving material is thrown out and collides and crushes with the material moving downward in the crushing chamber 6 ("stone hitting stone"). In the "stone hitting stone" state, the ratio of machine sand to crushed stone in the finished material obtained by the discharge port 7 is large (machine sand crushed stone ratio); if there is no material moving downward in the crushing chamber 6, that is, the first conveyor belt stops feeding, and only the second conveyor belt is fed, the transversely moving material is thrown out and collides and crushes with the inner wall of the crushing machine body 1 ("stone hitting iron"). In the "stone hitting iron" state, the ratio of machine sand to crushed stone in the finished material obtained by the discharge port 7 is small (machine sand crushed stone ratio). Based on this, the present invention controls the feeding speed of the first conveyor belt and the second conveyor belt through a controller, thereby adjusting the machine sand crushed stone ratio. Since the rotor mechanism is connected to the controller, the controller further adjusts the machine sand crushed stone ratio by adjusting the rotation speed of the rotor mechanism, so as to achieve a wide range of adjustable machine sand crushed stone ratio, and finally obtain the finished material required by the user.

[0025] In order to enhance the crushing effect of "stone hitting iron", an impact liner 19 is provided in the crushing body 1, and the impact liner 19 is arranged in a ring shape on the side wall of the crushing chamber 6. When the first conveyor belt stops feeding and only feeds through the second conveyor belt, the laterally moving material is thrown out and collides with the impact liner 19 in the crushing body 1. The crushing body 1 is effectively protected, the service life of the crushing body 1 is increased, and the crushing quality and efficiency are improved.

[0026] In this embodiment, the controller is connected to a discharge control module for regulating the ratio of machine sand to gravel. Based on the ratio of machine sand to gravel regulated by the discharge control module, the controller controls the operation of the first drive mechanism and the second drive mechanism so that the first conveyor belt and the second conveyor belt feed at different speed ratios, and controls the rotation speed of the rotor mechanism to adjust the ratio of machine sand to gravel. The discharge control module serves as a control panel of the controller, which is convenient for users to adjust the ratio of machine sand to gravel of the finished material. The present invention can control the flow rate of the falling material of the first conveyor belt and the throwing material of the second conveyor belt, adjust different flow ratios, and can adjust the rotation speed of the rotor mechanism and the collision state of the materials to obtain finished materials with different ratios of machine sand to gravel, which can be directly applied to the processing of concrete.

[0027] Specifically, the first driving mechanism includes a first driving motor, a first active transmission wheel and a first driven transmission wheel, the first driving motor is connected to the controller, the output shaft of the first driving motor is connected to the first active transmission wheel, the first active transmission wheel and the first driven transmission wheel are connected through a first transmission belt, and the controller is used to control the rotation speed of the first driving motor so that the first transmission belt conveys materials to the first blanking channel 2 at different speeds. The second driving mechanism includes a second driving motor, a second active transmission wheel and a second driven transmission wheel, the second driving motor is connected to the controller, the output shaft of the second driving motor is connected to the second active transmission wheel, the second active transmission wheel and the second driven transmission wheel are connected through a second transmission belt, and the controller is used to control the rotation speed of the second driving motor so that the second transmission belt conveys materials to the second blanking channel 3 at different speeds, which is convenient for conveying and has high transmission efficiency. A storage hopper is arranged above the first transmission belt and the second transmission belt, and the storage hopper feeds materials to the first transmission belt and the second transmission belt respectively. The first driving motor and the second driving motor both use variable frequency motors, and the rotation speeds of the first driving motor and the second driving motor are controlled by the controller.

[0028] In this embodiment, a guide member is provided above the rotor mechanism, and the guide member is used to guide the material of the first material drop channel 2 into the crushing chamber 6. Specifically, the guide member includes a guide cone 8, a first guide cylinder 9 is provided at the top of the guide cone 8, the first material drop channel 2 is arranged in the first guide cylinder 9, a second guide cylinder 10 is provided at the bottom of the guide cone 8, and the second material drop channel 3 is arranged in the second guide cylinder 10. The top of the first guide cylinder 9 serves as the drop opening of the first conveyor belt, and the material of the first conveyor belt falls downward along the first guide cylinder 9, enters the annular crushing chamber 6 after being dispersed by the guide cone 8, and then moves downward in the crushing chamber 6. The top of the second guide cylinder 10 serves as the drop opening of the second conveyor belt, and the material of the second conveyor belt falls downward along the second guide cylinder 10, and then enters the rotor mechanism, and the rotor mechanism accelerates the material and throws it out laterally, and the laterally moving material collides with the material moving downward in the crushing chamber 6, so as to realize the stone-to-stone crushing process of the material or directly collides with the cavity wall to realize the stone-to-iron crushing process. The present invention provides the first material dropping channel 2 and the second material dropping channel 3, thereby forming a vertically downward material waterfall on the circumferential side of the rotor mechanism. The material waterfall is located on the path of the rotor mechanism laterally throwing out the material, which greatly enhances the collision and crushing effect.

[0029] like Figure 2As shown, specifically, the rotor mechanism includes an impeller 11, an impact block 12 is installed on the impeller 11, the impeller 11 is connected to a fixed seat 13, the fixed seat 13 is connected to a third driving mechanism for driving it to rotate, and the third driving mechanism is connected to a controller. The top opening of the impeller 11 facilitates the material to fall into the impeller 11. The third driving mechanism drives the impeller 11 to rotate, so that the impeller 11 accelerates and throws the material. Since the impact block 12 is installed on the impeller 11, when the material is accelerated and thrown, part of the material first collides with the impact block 12, which effectively improves the crushing effect and also protects the impeller 11.

[0030] The third driving mechanism includes a third driving motor 14, a driving pulley 15, a driven pulley 16 and a synchronous belt 17. The output shaft of the third driving motor 14 is connected to the driving pulley 15. The driving pulley 15 is connected to the driven pulley 16 through the synchronous belt 17. The driven pulley 16 is connected to a crushing spindle 18, and the end of the crushing spindle 18 is connected to the fixed seat 13. The crushing spindle 18 is installed in the crushing machine body 1 through a bearing, and the driven pulley 16 is arranged at the bottom end of the crushing spindle 18. The top end of the crushing spindle 18 is fixedly connected to the fixed seat 13. The structure is stable, and the rotor mechanism throws materials smoothly, thereby ensuring the crushing efficiency of the crushing device.

[0031] When the particle size of the material input is large, the controller controls the third drive motor 14 to operate at a low speed, and the crushing device crushes and shapes the material to avoid the formation of needle-shaped gravel and produce gravel with a good particle shape; when the particle size of the material input is small, the controller controls the third drive motor to operate at a high speed, and by adjusting the different speeds of the first drive motor and the second drive motor, different machine-sand-gravel ratios and controllable coarse-fine sand ratios can be obtained. Finished materials.

[0032] In the description of the present invention, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, and may be fixedly connected, detachably connected, or integrated; may be mechanically connected or electrically connected; may be directly connected or indirectly connected through an intermediate medium, may be the internal connection of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood. In addition, the specific features, structures, etc. described in the embodiments are included in at least one embodiment. Under the condition that there is no contradiction, those skilled in the art may combine the features of different embodiments. The protection scope of the present invention is not limited to the above-mentioned specific examples. According to the basic technical concept of the present invention, the embodiments that can be associated with by ordinary technicians in this field without creative work all belong to the protection scope of the present invention.

Claims

1. An impact crushing device with a widely adjustable sand-to-stone ratio, comprising a crushing body (1), characterized in that: The crushing machine body (1) is provided with a first material dropping channel (2) and a second material dropping channel (3), the first material dropping channel (2) is connected to a first feeding mechanism (4), and the second material dropping channel (3) is connected to a second feeding mechanism (5); a rotor mechanism is provided inside the crushing machine body (1), a crushing chamber (6) is provided outside the rotor mechanism, and the crushing machine body (1) is provided with a discharge port (7) connected to the crushing chamber (6); the first material dropping channel (2) is distributed in an annular shape outside the second material dropping channel (3), the first material dropping channel (2) is connected to the crushing chamber (6), and the second material dropping channel (3) is connected to the inside of the rotor mechanism; and a controller is also included, the rotor mechanism, the first feeding mechanism (4) and the second feeding mechanism (5) are all connected to the controller, and the controller is used to control the rotation speed of the rotor mechanism and the feeding speed of the first feeding mechanism (4) and the second feeding mechanism (5) respectively, so as to adjust the machine sand crushing stone ratio.

2. The impact crushing device with a widely adjustable machine-sand-gravel ratio according to claim 1 is characterized in that: The first feeding mechanism (4) comprises a first conveyor belt, which is equipped with a first driving mechanism; the second feeding mechanism (5) comprises a second conveyor belt, which is equipped with a second driving mechanism, and the second driving mechanism and the first driving mechanism are both connected to the controller.

3. The impact crushing device with a widely adjustable machine-sand-gravel ratio according to claim 2 is characterized in that: The controller is connected to a discharge control module for adjusting the machine-sand-gravel ratio. Based on the machine-sand-gravel ratio adjusted by the discharge control module, the controller controls the operation of the first drive mechanism and the second drive mechanism so that the first conveyor belt and the second conveyor belt feed at different speed ratios, and controls the rotation speed of the rotor mechanism to adjust the machine-sand-gravel ratio.

4. The impact crushing device with a widely adjustable machine-sand-gravel ratio according to claim 2 is characterized in that: The first driving mechanism comprises a first driving motor, a first active transmission wheel and a first driven transmission wheel, the first driving motor is connected to the controller, the output shaft of the first driving motor is connected to the first active transmission wheel, the first active transmission wheel and the first driven transmission wheel are connected via a first transmission belt, and the controller is used to control the rotation speed of the first driving motor so that the first transmission belt conveys materials to the first blanking channel (2) at different speeds.

5. The impact crushing device with a widely adjustable machine-sand-gravel ratio according to claim 4 is characterized in that: The second driving mechanism comprises a second driving motor, a second active transmission wheel and a second driven transmission wheel, the second driving motor is connected to the controller, the output shaft of the second driving motor is connected to the second active transmission wheel, the second active transmission wheel and the second driven transmission wheel are connected via a second transmission belt, and the controller is used to control the rotation speed of the second driving motor so that the second transmission belt conveys materials to the second blanking channel (3) at different speeds.

6. The impact crushing device with a widely adjustable machine-sand-gravel ratio according to claim 1 is characterized in that: A material guide is provided above the rotor mechanism, and the material guide is used to guide the material in the first material drop channel (2) into the crushing chamber (6).

7. The impact crushing device with a widely adjustable machine-sand-gravel ratio according to claim 6 is characterized in that: The material guide member comprises a material guide cone (8), a first material guide cylinder (9) is provided at the top of the material guide cone (8), and the first material drop channel (2) is provided in the first material guide cylinder (9); a second material guide cylinder (10) is provided at the bottom of the material guide cone (8), and the second material drop channel (3) is provided in the second material guide cylinder (10).

8. The impact crushing device with a widely adjustable machine-sand-gravel ratio according to claim 1 is characterized in that: The rotor mechanism comprises an impeller (11), an impact block (12) is mounted on the impeller (11), the impeller (11) is connected to a fixed seat (13), the fixed seat (13) is connected to a third driving mechanism for driving the impeller to rotate, and the third driving mechanism is connected to a controller.

9. The impact crushing device with a widely adjustable machine-sand-gravel ratio according to claim 8 is characterized in that: The third driving mechanism comprises a third driving motor (14), a driving pulley (15), a driven pulley (16) and a synchronous belt (17); the output shaft of the third driving motor (14) is connected to the driving pulley (15); the driving pulley (15) and the driven pulley (16) are connected via a synchronous belt (17); the driven pulley (16) is connected to a crushing main shaft (18); the end of the crushing main shaft (18) is connected to the fixed seat (13); the controller is used to control the rotation speed of the third driving motor (14) so ​​that the material inside the impeller (11) is ejected at different speeds and collides and crushes with the material in the crushing chamber (6).

10. The impact crushing device with a widely adjustable machine-sand-gravel ratio according to claim 1, characterized in that: An impact liner (19) is arranged in the crushing machine body (1), and the impact liner (19) is arranged in an annular shape on the side wall of the crushing chamber (6).

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