Material crushing and screening device

Abstract

The utility model discloses a material crushing and screening device which comprises a crusher, a circular boss is fixedly connected to the inner rear wall of the crusher, two crushing rollers are rotationally installed in the crusher in a bilateral symmetry mode, a discharging opening is formed in the lower portion of the crusher, a screen frame is installed in the discharging opening in a sliding mode, a filter screen is installed in the screen frame in an embedded mode, and a material outlet is formed in the lower portion of the crusher. A connecting rotating ring is rotatably connected to the circular boss through a bearing, a plurality of overturning shovels are fixedly connected to the position, close to the edge, of the front face of the connecting rotating ring, the overturning shovels are attached to the inner wall of the crusher, a hopper is fixedly connected to the upper face of the crusher, and supporting legs are fixedly connected to the lower face of the crusher in a bilateral symmetry mode. The crushed materials are screened through the filter screen arranged at the discharge port, only the materials reaching the crushing standard can be discharged through the filter screen, and the materials not reaching the crushing standard can be shoveled and conveyed to the position between the two crushing rollers to be crushed again by the overturning shovel again, so that the situation that the materials are directly discharged due to the fact that the crushed materials do not reach the standard is effectively avoided.

Description

Technical Field

[0001] The utility model relates to a crushing device, in particular to a material crushing and screening device. Background Art

[0002] A crusher is a machine that crushes large-sized solid raw materials into required sizes and is widely used in various production fields.

[0003] For example, a material crusher with a publication number of CN219984827U disclosed in a Chinese patent includes a sealing mechanism and a crushing mechanism. The sealing mechanism includes a first fixed seat and a second fixed seat. An activity plate is movably connected to the upper part of the second connecting seat. A servo motor is fixedly connected to the activity plate. The output end of the servo motor is fixedly connected to a connecting column. The connecting column is located above the first connecting seat. The other end of the connecting column is fixedly connected to a second crushing roller. An adjusting component is arranged at the other end of the second crushing roller. Through the arrangement of the adjusting component in the utility model, it is convenient to realize the distance between the two groups of first crushing rollers and the second crushing roller, so as to freely adjust the degree of crushing. At the same time, the first fixed seat, the second fixed seat and the installation frame are fixedly connected to form a closed whole, and a sound insulation board is installed inside the whole, which is convenient to reduce the noise pollution and dust volatilization during the crushing process;

[0004] When the above-mentioned existing material crusher is used, some problems are found. First, after the raw materials are broken once, there will be some unqualified raw materials mixed in them, which need to be separated by a screening device and then broken again for the second time, which is a relatively cumbersome problem. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a material crushing and screening device to solve the existing problems mentioned in the above background art.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A material crushing and screening device includes a crusher. A circular boss is fixedly connected to the inner rear wall of the crusher. Two crushing rollers are symmetrically and rotatably installed on the left and right inside the crusher. A discharge port is opened below the crusher. A mesh frame is slidably installed in the discharge port. A filter screen is embedded and installed in the mesh frame. A connecting rotating ring is rotatably connected to the circular boss through a bearing. A plurality of turning shovels are fixedly connected to the front of the connecting rotating ring near the edge. The turning shovels are attached to the inner wall of the crusher.

[0007] Preferably, a hopper is fixedly connected to the upper part of the crusher. Legs are symmetrically and fixedly connected to the lower part of the crusher on the left and right. A power motor is fixedly connected to the rear of the crusher. The output end of the power motor is fixedly connected to one of the crushing rollers. Transmission teeth are fixedly connected to the front ends of the two crushing rollers. The two transmission teeth are meshed with each other.

[0008] Preferably, support plates are fixedly connected below the crusher and on both sides of the discharge port, and support seats are fixedly connected symmetrically before and after on the opposite surfaces of the two support plates.

[0009] Preferably, telescopic connecting rods are fixedly connected to the positions near the four corners below the mesh frame. The lower ends of the telescopic connecting rods are fixedly connected to the support seats, and return springs are sleeved on the telescopic connecting rods.

[0010] Preferably, convex blocks are fixedly connected symmetrically before and after on the upper surface of the mesh frame. An interference rod is fixedly connected to the front surface of the connecting rotating ring, and the interference rod cooperates with the convex block.

[0011] Preferably, an avoidance groove is formed on the turning shovel, and the avoidance groove cooperates with the convex block. A driving motor is fixedly connected to the rear of the crusher. The output end of the driving motor is fixedly connected with a driving gear. A communication groove is formed in the rear of the crusher, and a tooth groove is formed in the rear of the connecting rotating ring. The tooth groove cooperates with the driving gear.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] 1. The crushed materials are screened by the filter screen arranged at the discharge port. Only the materials that meet the crushing standard can pass through the filter screen and be discharged, while the unqualified materials will be shoveled again by the turning shovel between the two crushing rollers for further crushing, effectively avoiding the direct discharge of materials with unqualified crushing.

[0014] 2. Through the mutual cooperation of the interference rod and the convex block, the mesh frame moves up and down to generate vibration, avoiding the accumulation of crushed materials on the filter screen and blocking the filter holes, which affects the normal discharge of the crushed materials that meet the standard. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0016] Figure 2 is a schematic diagram of the overall structure of the other side of the present utility model;

[0017] Figure 3 is a half-sectional view of the present utility model;

[0018] Figure 4 is a schematic diagram of the structure of the connecting rotating ring of the present utility model;

[0019] Figure 5 is a schematic diagram of the structure of the mesh frame of the present utility model.

[0020] In the figure: 1. Crusher; 101. Hopper; 102. Leg; 103. Support plate; 104. Support seat; 105. Circular boss; 106. Crushing roller; 107. Transmission gear; 108. Power motor; 109. Connecting groove; 2. Mesh frame; 201. Filter screen; 202. Bump; 203. Telescopic connecting rod; 204. Return spring; 3. Connecting swivel; 301. Interference rod; 302. Inverting shovel; 303. Avoidance groove; 304. Tooth groove; 4. Driving motor; 401. Driving gear. Specific implementation manner

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] Please refer to Figures 1-5 , the present invention provides a technical solution: a material crushing and screening device, including a crusher 1. A circular boss 105 is fixedly connected to the inner rear wall of the crusher 1. Two crushing rollers 106 are symmetrically and rotatably installed on the left and right sides inside the crusher 1. A discharge port is opened below the crusher 1. A mesh frame 2 is slidably installed in the discharge port. A filter screen 201 is embedded in the mesh frame 2. A connecting swivel 3 is rotatably connected to the circular boss 105 through a bearing. A plurality of inverting shovels 302 are fixedly connected to the position near the edge of the front surface of the connecting swivel 3. The inverting shovels 302 are attached to the inner wall of the crusher 1.

[0023] In this implementation scheme, by adding the material to be crushed into the interior of the crusher 1, the material will first fall between the two crushing rollers 106. The two crushing rollers 106 rotate towards each other, and the material falling in the middle will be crushed. The crushed material will fall to the bottom of the crusher 1, that is, above the mesh frame 2. The material that has been initially crushed to the standard will be directly discharged through the filter screen 201, while the non-standard material will remain on the mesh frame 2. Subsequently, rotating the connecting swivel 3 can drive the inverting shovels 302 to rotate. The inverting shovels 302 are attached to the inner wall of the crusher 1. Therefore, the rotation of the inverting shovels 302 will shovel the material accumulated at the bottom of the crusher 1. As the inverting shovels 302 rotate, the non-standard material will be driven back above the interior of the crusher 1 again, slide off the inverting shovels 302 and fall between the two crushing rollers 106 for re-crushing. Repeat the above operations until the material is completely crushed to the standard and discharged through the filter screen 201.

[0024] Among them, in order to achieve the purpose of driving the rotation of the two crushing rollers 106, the following technical solution is adopted in this device: A hopper 101 is fixedly connected to the upper part of the crusher 1, and support legs 102 are symmetrically and fixedly connected to the left and right sides of the lower part of the crusher 1. A power motor 108 is fixedly connected to the rear of the crusher 1. The output end of the power motor 108 is fixedly connected to one crushing roller 106. Transmission teeth 107 are fixedly connected to the front ends of the two crushing rollers 106, and the two transmission teeth 107 are meshed with each other. Support plates 103 are fixedly connected to the lower part of the crusher 1 and on both sides of the discharge port. Support seats 104 are symmetrically and fixedly connected to the opposite surfaces of the two support plates 103 in the front and rear directions. Telescopic connecting rods 203 are fixedly connected to the positions near the four corners of the lower part of the mesh frame 2. The lower ends of the telescopic connecting rods 203 are fixedly connected to the support seats 104, and a return spring 204 is sleeved on the telescopic connecting rods 203.

[0025] The hopper 101 facilitates feeding materials into the interior of the crusher 1. The support legs 102 are used to support the crusher 1 at an appropriate height, facilitating the placement of a collection device below the discharge port. Starting the power motor 108 can drive the rotation of one crushing roller 106, and the transmission teeth 107 are meshed with each other. After one crushing roller 106 rotates, the transmission of the transmission teeth 107 will drive the other crushing roller 106 to rotate in the opposite direction, so that the two crushing rollers 106 rotate towards each other to crush the materials. The telescopic connecting rods 203 are used to support the mesh frame 2 and slidably install it in the discharge port, restricting the mesh frame 2 to only move up and down. The return spring 204 can provide a certain upward thrust for the mesh frame 2, so that the mesh frame 2 is in the discharge port and in a state where the upper surface of the mesh frame 2 is flush with the inner wall of the crusher 1.

[0026] Among them, in order to achieve the purpose of preventing raw materials from accumulating and blocking the filter screen 201, the following technical solution is adopted in this device: Protrusions 202 are symmetrically and fixedly connected to the front and rear of the upper part of the mesh frame 2. An interference rod 301 is fixedly connected to the front surface of the connecting rotating ring 3. The interference rod 301 cooperates with the protrusion 202. An avoidance groove 303 is formed on the turning shovel 302, and the avoidance groove 303 cooperates with the protrusion 202. A driving motor 4 is fixedly connected to the rear of the crusher 1. The output end of the driving motor 4 is fixedly connected to a driving gear 401. A communication groove 109 is formed at the rear of the crusher 1. A tooth groove 304 is formed at the rear of the connecting rotating ring 3, and the tooth groove 304 cooperates with the driving gear 401.

[0027] Through the cooperation of the bump 202 and the interference rod 301, a fillet is made at one corner of the bump 202. When the connecting rotating ring 3 rotates, it will drive the interference rod 301 to rotate synchronously. The interference rod 301 will contact the bump 202. At this time, the interference rod 301 will squeeze the bump 202 downward, thereby driving the screen frame 2 to move downward. After the interference rod 301 is disengaged from the bump 202, the screen frame 2 will quickly reset and move upward under the push of the return spring 204, thereby generating a certain vibration to avoid the problem that the material accumulates on the screen frame 2, resulting in the blockage of the filter screen 201 and the failure to discharge the unqualified crushed material in time. The avoidance groove 303 can prevent the bump 202 from contacting the turning shovel 302. Thus, when the turning shovel 302 rotates above the screen frame 2, the connecting rotating ring 3 will not move downward, so that the turning shovel 302 can shovel the accumulated raw materials into the air. Starting the drive motor 4 can drive the drive gear 401 to rotate. The drive gear 401 meshes in the tooth groove 304 through the communication groove 109. Furthermore, the rotation of the drive gear 401 will drive the connecting rotating ring 3 to rotate.

[0028] The working principle and usage process of the present utility model: When in use, the material to be crushed needs to be fed into the hopper 101. Subsequently, the material will fall from the hopper 101 between the two crushing rollers 106 inside the crusher 1. Start the power motor 108 to drive the two crushing rollers 106 to rotate towards each other to crush the material falling in the middle. The crushed material will fall to the bottom of the crusher 1, that is, above the screen frame 2. The preliminarily crushed qualified material will be directly discharged through the filter screen 201, while the unqualified material will remain on the screen frame 2. Start the drive motor 4 to drive the connecting rotating ring 3 to rotate. The rotation of the connecting rotating ring 3 will drive the interference rod 301 and the turning shovel 302 to rotate synchronously. The interference rod 301 will cooperate with the bump 202, thereby causing the screen frame 2 to move up and down to generate vibration, avoiding the accumulation of crushed material on the filter screen 201 and blocking the filter holes. The rotation of the turning shovel 302 will shovel the material accumulated at the bottom of the crusher 1. As the turning shovel 302 rotates, the unqualified material will be driven back above the inside of the crusher 1 and slide off the turning shovel 302 between the two crushing rollers 106 for secondary crushing.

[0029] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A material crushing and screening device, comprising a crusher (1), characterized in that: A circular boss (105) is fixedly connected to the inner rear wall of the crusher (1). Two crushing rolls (106) are symmetrically and rotatably installed on the left and right inside the crusher (1). A discharge port is formed below the crusher (1). A mesh frame (2) is slidably installed in the discharge port. A filter screen (201) is embedded in the mesh frame (2). A connecting rotating ring (3) is rotatably connected to the circular boss (105) through a bearing. A plurality of turning shovels (302) are fixedly connected to the front of the connecting rotating ring (3) near the edge. The turning shovels (302) are in contact with the inner wall of the crusher (1).

2. A material crushing and screening device according to claim 1, characterized in that: A hopper (101) is fixedly connected to the upper surface of the crusher (1). Support legs (102) are symmetrically and fixedly connected to the left and right below the crusher (1). A power motor (108) is fixedly connected to the rear of the crusher (1). The output end of the power motor (108) is fixedly connected to one of the crushing rolls (106). Transmission teeth (107) are fixedly connected to the front ends of both crushing rolls (106). The two transmission teeth (107) are engaged with each other.

3. A material crushing and screening device according to claim 1, characterized in that: Support plates (103) are fixedly connected to the lower surface of the crusher (1) and on both sides of the discharge port. Support seats (104) are symmetrically and fixedly connected to the opposite surfaces of the two support plates (103) in the front and rear directions.

4. A material crushing and screening device according to claim 3, characterized in that: Elongated telescopic connecting rods (203) are fixedly connected to the lower surface of the mesh frame (2) near the four corners. The lower ends of the elongated telescopic connecting rods (203) are fixedly connected to the support seats (104). A return spring (204) is sleeved on the elongated telescopic connecting rods (203).

5. A material crushing and screening device according to claim 1, characterized in that: Protrusions (202) are symmetrically and fixedly connected to the upper surface of the mesh frame (2) in the front and rear directions. An interference rod (301) is fixedly connected to the front of the connecting rotating ring (3). The interference rod (301) cooperates with the protrusions (202).

6. A material crushing and screening device according to claim 5, characterized in that: Avoidance grooves (303) are formed in the turning shovels (302). The avoidance grooves (303) cooperate with the protrusions (202). A driving motor (4) is fixedly connected to the rear of the crusher (1). A driving gear (401) is fixedly connected to the output end of the driving motor (4). A communication groove (109) is formed in the rear of the crusher (1). A tooth groove (304) is formed in the rear of the connecting rotating ring (3). The tooth groove (304) cooperates with the driving gear (401).

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