Novel grinding and screening device

Abstract

A novel grinding and screening device comprises a grinding box, a feeding hopper and a discharging hopper are arranged on the grinding box, a multi-stage grinding device, a driving device and a screening device are arranged in the grinding box, a recycling device is further arranged on the outer side of the grinding box, and the multi-stage grinding device comprises three grinding assemblies. Each grinding assembly comprises a grinding block and a grinding disc, the side face of the grinding disc is rotatably connected with the inner wall of the grinding box, the grinding block is of an inverted cone structure, a groove matched with the grinding block is formed in the grinding disc, the screening device comprises an obliquely-arranged screening plate, a discharging port is formed in the lower end of the screening plate, and the discharging port is communicated with the screening plate. The discharging port is communicated with a feeding port of the recycling device through a connecting pipe, and a discharging port of the recycling device is communicated with a feeding hopper of the grinding box through a flow guide plate. Due to the arrangement of the pretreatment structure, the grinding efficiency is improved, the service life of the device is prolonged, unqualified raw material particles can be repeatedly ground, and the uniformity of the discharged particles is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of expansion agent production and processing equipment, and specifically relates to a novel grinding and screening device. BACKGROUND

[0002] As an important building material additive, expansion agent is widely used in various concrete products to improve the expansion performance and crack resistance of concrete. With the rapid development of modern construction industry, the quality requirements for expansion agent are becoming higher and higher, especially the particle size distribution and fineness of expansion agent. In the current production process of expansion agent, the grinding and screening of raw materials are two important links. Traditional grinding equipment usually uses a single grinding disc, and the raw materials are prone to uneven stress during grinding, resulting in a large particle size distribution range. Some screening equipment usually uses a simple screen structure, which has low screening efficiency and is prone to blockage. Moreover, most of the screening equipment relies on manual operation, which has low production efficiency and cannot guarantee the grinding quality, affecting the stability and consistency of the finished expansion agent.

[0003] Chinese patent document CN213792081U discloses a concrete expansion agent production raw material grinding mechanism. The inside of the shell is provided with a grinding device and a screening device. The grinding device includes a first motor and a hydraulic cylinder. The first motor is connected to the rotating grinding block through a first rotating shaft. The fixed grinding block is arranged on the upper side of the rotating grinding block. The screening device includes a first guide plate arranged at the lower end of the rotating grinding block. The lower end of the first guide plate is provided with a rotating brush. The rotating brush is arranged on a second rotating shaft and provided with a screen and a second guide plate at the lower end. The grinding distance is adjusted by hydraulic lifting to reduce labor costs. The rotating brush is used to screen the material to prevent the equipment from falling off and causing safety hazards and to reduce noise. The utility model proposes a grinding and screening device for expansion agent production with other structures. SUMMARY

[0004] The utility model aims at providing a novel grinding and screening device, which is provided with a pretreatment structure to improve the grinding efficiency and service life of the device, can repeatedly grind unqualified raw material particles, and improves the uniformity of the discharged particles.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0006] The utility model provides a novel grinding screening device, including the grinding box, the top of grinding box is equipped with the feeding hopper, the bottom of grinding box is equipped with the discharge hopper, be equipped with multistage grinding device, driving device and screening device in grinding box, the outside of grinding box is equipped with recovery device still, multistage grinding device includes three groups of grinding assembly arranged in turn from top to bottom, every group of grinding assembly includes grinding block and grinding disc, the lateral surface of grinding disc is rotatablely connected with the inner wall of grinding box, the grinding block is inverted conical structure, the uppermost grinding block is fixedly connected with the inner top wall of grinding box through connecting rod, the rest grinding block is fixedly connected with the upper grinding block in turn through connecting block, the recess of matching grinding block is opened in the grinding disc, the through -hole is opened in the recess bottom, and the lower surface of grinding block and recess surface exist grinding gap, the grinding gap of three groups of grinding assembly decreases in turn from top to bottom, driving device drives the rotation of grinding disc, the screening device includes sieve plate, the sieve plate is inclinedly arranged below multistage grinding device, the lower end of sieve plate is located the side wall of grinding box and is opened the discharge port, the discharge port is communicated with the feed inlet of recovery device through the connecting pipe, and the discharge outlet of recovery device is communicated with the feed hopper of grinding box through the deflector.

[0007] As a preferred technical scheme, the feeding hopper is provided with a crushing device, the crushing device includes two crushing rollers, the two crushing rollers are arranged side by side in the feeding hopper, the two ends of the crushing rollers are rotatably connected with the inner wall of the feeding hopper, and the outer wall of the feeding hopper is provided with a motor, the driving end of the motor is fixedly connected with the crushing rollers.

[0008] As a preferred technical scheme, the grinding assembly further includes a flow guide block, the flow guide block is a positive conical structure, and the flow guide block is fixedly arranged on the top of the grinding block.

[0009] As a preferred technical scheme, the discharge end of the flow guide block is located in the recess of the grinding disc.

[0010] As a preferred technical scheme, the grinding assembly further includes a brush, the brush is arranged on the outer surface of the grinding block along the generatrix of the conical body, and the length of the bristles of the brush matches the grinding gap of each group of grinding assemblies.

[0011] As a preferred technical scheme, the driving device includes three gear rings, a first motor, a rotating shaft and three gears, the gear rings are embedded in the side wall of the grinding disc, the rotating shaft is rotatably arranged on the outside of the grinding box through a mounting plate, the first motor is fixedly arranged on the top of the mounting plate, the driving end of the first motor is fixedly connected with the top end of the rotating shaft, the gears are fixedly arranged on the rotating shaft, square holes are formed in the side wall of the grinding box for the gears to pass through, and the gears pass through the square holes and engage with the gear rings.

[0012] As a preferred technical scheme, the screening device further comprises a vibration exciter and a damping assembly, the vibration exciter is fixedly arranged at the bottom of the higher end of the screen plate, and the damping assembly is fixedly arranged on the inner wall of the grinding box.

[0013] As a preferred technical scheme, the damping assembly comprises a fixing seat and a spring damper, the fixing seat is fixedly arranged on the inner wall of the grinding box, and the spring damper is fixedly arranged at the top of the fixing seat and fixedly connected with the screen plate.

[0014] As a preferred technical scheme, the recycling device comprises a shell, an auger and a second motor, the shell is arranged in an inclined manner, the auger is rotatably arranged in the shell, and the second motor is fixedly arranged at the top of the higher end of the shell and fixedly connected with the shaft of the auger.

[0015] As a preferred technical scheme, the flow guide plate is provided with baffles on both sides.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] 1、The crushing device is arranged in the feeding hopper, the raw material particles entering the grinding box are pretreated, the size of the raw material particles is reduced in advance, the jamming and damage of the grinding block and the grinding disc caused by excessively large particles are avoided, and the service life of the grinding block and the grinding disc is prolonged.

[0018] 2、The multi-stage grinding device is arranged, the grinding gaps from top to bottom are sequentially reduced, and the grinding precision and uniformity can be improved.

[0019] 3、The recycling device is arranged, the raw material particles not meeting the particle size standard can be collected and then conveyed into the grinding box for grinding again until the standard is met, and the grinding effect is improved. DRAWINGS

[0020] The specific embodiments of the utility model will be further described in detail in combination with the drawings:

[0021] Fig. 1 It is a structural schematic view of the utility model;

[0022] Fig. 2 It is an enlarged view of A of the utility model;

[0023] Among them, the reference signs are as follows:

[0024] 1-grinding box, 2-feeding hopper, 3-crushing roller, 4-discharge hopper, 5-grinding block, 6-guiding block, 7-grinding disc, 8-brush, 9-toothed ring, 10-mounting plate, 11-first motor, 12-rotating shaft, 13-gear, 14-sieve plate, 15-vibrator, 16-fixing seat, 17-spring damper, 18-connecting pipe, 19-housing, 20-auger, 21-second motor, 22-guiding plate, 23-baffle. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0026] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application. It should be noted that: similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0027] In the description of the present application, it should be noted that if the orientation or position relationship indicated by the terms "center", "upper", "lower", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, or is the orientation or position relationship when the product of the application is usually placed, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In the description of the present application, it should also be noted that unless otherwise explicitly specified and limited, if the terms "set", "mount", "connect" appear, they should be understood in a broad sense, for example, they can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be the communication between two elements inside. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0028] EMBODIMENT

[0029] As Figs. 1-2As shown, a new grinding screening device, including grinding box 1, the top of the grinding box 1 is provided with feeding hopper 2, the bottom of the grinding box 1 is provided with discharge hopper, the inside of the grinding box 1 is provided with multi-stage grinding device, driving device and screening device, the outside of the grinding box 1 is also provided with recycling device, the multi-stage grinding device includes three groups of grinding assemblies arranged from top to bottom, each group of grinding assemblies includes grinding block 5 and grinding disc 7, the side surface of the grinding disc 7 is rotatably connected with the inner wall of the grinding box 1, the grinding block 5 is inverted conical structure, the uppermost grinding block 5 is fixedly connected with the inner top wall of the grinding box 1 through connecting rod, the remaining grinding blocks 5 are fixedly connected with the upper grinding block 5 in turn through connecting block, the grinding disc 7 is provided with groove matched with the grinding block 5, the bottom of the groove is provided with through hole, the lower surface of the grinding block 5 and the surface of the groove exist grinding gap, the grinding gaps of the three groups of grinding assemblies decrease from top to bottom, the driving device drives the grinding disc 7 to rotate, the screening device includes sieve plate 14, the sieve plate 14 is arranged obliquely below the multi-stage grinding device, the lower end of the sieve plate 14 is provided with discharge port on the side wall of the grinding box 1, the discharge port is communicated with the feeding port of the recycling device through connecting pipe 18, the discharge port of the recycling device is communicated with the feeding hopper 2 of the grinding box 1 through guide plate 22.

[0030] It is worth noting that the multi-stage grinding device is provided to grind the raw materials of the expanding agent, so that the particle size of the raw materials meets the standard, the driving device is provided to drive the multi-stage grinding device to grind, the screening device is provided to screen, the raw material particles meeting the particle size standard and not meeting the particle size standard are screened, the raw material particles not meeting the particle size are collected by the recycling device and re-conveyed to the grinding box 1 for grinding, specifically, the raw materials of the expanding agent enter the grinding box 1 from the feeding hopper 2, the raw materials fall into the grinding gap between the grinding block 5 and the grinding disc 7, the driving device drives the grinding disc 7 to rotate to grind the raw material particles, the raw material particles after three-stage grinding fall onto the screening device, are screened by the sieve plate 14, the raw material particles meeting the particle size standard are discharged from the grinding box 1 through the discharge hopper 4, the raw material particles not meeting the particle size standard slide along the sieve plate 14, enter the recycling device through the connecting pipe 18, and the raw material particles not meeting the particle size standard are re-conveyed to the feeding hopper 2 by the recycling device and re-ground in the grinding box 1.

[0031] In particular, the surface of the groove in the grinding disc 7 is rough and uneven, which can increase the friction force with the raw material particles, increase the residence time of the raw material particles in the grinding gap, and improve the grinding effect.

[0032] It should be noted that the side surface of the grinding disc 7 is provided with a sliding groove, and the inner wall of the grinding box 1 is correspondingly provided with a convex sliding assembly, the sliding assembly includes a ring-shaped convex and a plurality of balls, the top of the ring-shaped convex is provided with a plurality of balls, the balls can reduce friction and support the grinding disc 7.

[0033] In some possible embodiments, the feeding hopper 2 is provided with a crushing device, the crushing device includes two crushing rollers 3 arranged side by side in the feeding hopper 2, the two crushing rollers 3 are rotatably connected to the inner wall of the feeding hopper 2 at both ends, the outer wall of the feeding hopper 2 is provided with a motor, and the driving end of the motor is fixedly connected with the crushing roller 3. The motor drives the two crushing rollers 3 to rotate, and the raw material particles passing through the feeding hopper 2 are crushed and pretreated, some particles with too large particle size are crushed, and the particles with too large particle size are prevented from causing the jam of the grinding assembly.

[0034] In some possible embodiments, the grinding assembly further includes a flow guide block 6, the flow guide block 6 is a right conical structure, and the flow guide block 6 is fixedly arranged on the top of the grinding block 5 to guide the flow, so that the raw material particles can enter the grinding gap along the outer surface of the flow guide block 6 and will not be retained on the top of the grinding block 5.

[0035] In some possible embodiments, the discharge end of the flow guide block 6 is located in the groove of the grinding disc 7, so as to ensure that the falling raw material particles can all enter the grinding gap.

[0036] In some possible embodiments, the grinding assembly further includes a brush 8, the brush 8 is arranged on the outer surface of the grinding block 5 along the generatrix of the conical body of the grinding block 5, the bristle length of the brush 8 matches the grinding gap of each group of grinding assemblies, and when the grinding disc 7 rotates, the brush 8 can drive the ground raw material particles to move, so that the raw material particles can move downward along the grinding gap, and the accumulation of the ground raw material is prevented to affect the subsequent grinding work.

[0037] In some possible embodiments, the driving device includes three gear rings 9, a first motor 11, a rotating shaft 12 and three gears 13, the gear ring 9 is embeddedly arranged in the side wall of the grinding disc 7, the rotating shaft 12 is rotatably arranged on the outer side of the grinding box 1 through the mounting plate 10, the first motor 11 is fixedly arranged on the top of the mounting plate 10, the driving end of the first motor 11 is fixedly connected with the top end of the rotating shaft 12, the gear 13 is fixedly arranged on the rotating shaft 12, a square hole is formed in the side wall of the grinding box 1 for the gear 13 to pass through, and the gear 13 passes through the square hole and engages with the gear ring 9. The first motor 11 drives the rotating shaft 12 to rotate, the rotating shaft 12 drives the gear 13 to rotate, the gear 13 engages with the gear ring 9, and then the grinding disc 7 is driven to rotate.

[0038] In some possible embodiments, the screening device further includes a vibration exciter 15 and a damping assembly, the vibration exciter 15 is fixedly arranged at the bottom of the higher end of the sieve plate 14, the damping device is fixedly arranged on the inner wall of the grinding box 1, and the two ends of the sieve plate 14 are fixedly connected with the top of the damping assembly. The vibration exciter 15 can drive the sieve plate 14 to vibrate for screening, and the screening efficiency is improved.

[0039] In some possible embodiments, the damping assembly comprises a fixed seat 16 fixedly arranged on the inner wall of the grinding box 1 and a spring damper 17 fixedly arranged on the top of the fixed seat 16, and the top of the spring damper 17 is fixedly connected with the sieve plate 14.

[0040] In some possible embodiments, the recycling device comprises a shell 19, an auger 20 and a second motor 21, the shell 19 is arranged obliquely, the auger 20 is rotatably arranged in the shell 19, and the second motor 21 is fixedly arranged on the top of the higher end of the shell 19, and the driving end of the second motor 21 is fixedly connected with the shaft of the auger 20. After the raw material particles that do not meet the particle size standard enter the shell 19, the second motor 21 drives the auger 20 to rotate to drive the raw material particles to rise, and then the raw material particles are discharged from the discharge port of the shell 19 and enter the grinding box 1 through the flow guide plate 22.

[0041] In some possible embodiments, the flow guide plate 22 is provided with baffles 23 on both sides, and the baffles 23 play a limiting role to prevent the raw material particles from falling out from both sides of the flow guide plate 22.

[0042] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand. Having described the embodiments of the present disclosure in detail, in order to avoid obscuring the concept of the present disclosure, some details known in the art are not described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein according to the above description. The scope of the present disclosure is defined by the appended claims.

Claims

1. A new type of grinding and screening device, comprising a grinding box (1), the top of which is provided with a feeding hopper (2), and the bottom of which is provided with a discharging hopper, characterized in that, The grinding box (1) is provided with multi-stage grinding device, driving device and screening device, the outer side of the grinding box (1) is also provided with recycling device, the multi-stage grinding device includes three groups of grinding assemblies arranged in sequence from top to bottom, each group of grinding assemblies includes grinding block (5) and grinding disc (7), the side of the grinding disc (7) is rotatably connected with the inner wall of the grinding box (1), the grinding block (5) is inverted conical structure, the uppermost grinding block (5) is fixedly connected with the inner top wall of the grinding box (1) through connecting rod, the remaining grinding blocks (5) are fixedly connected with the upper grinding block (5) in sequence through connecting block, the grinding disc (7) is provided with groove matched with the grinding block (5), the bottom of the groove is provided with through hole, the lower surface of the grinding block (5) and the surface of the groove exist grinding gap, the grinding gaps of the three groups of grinding assemblies decrease in sequence from top to bottom, the driving device drives the grinding disc (7) to rotate, the screening device includes sieve plate (14), the sieve plate (14) is arranged obliquely below the multi-stage grinding device, the lower end of the sieve plate (14) is provided with discharge port on the side wall of the grinding box (1), the discharge port is communicated with the inlet of the recycling device through connecting pipe (18), the outlet of the recycling device is communicated with the inlet hopper (2) of the grinding box (1) through guide plate (22).

2. A novel grinding and screening device as claimed in claim 1, wherein, The inlet hopper (2) is provided with crushing device, the crushing device includes two crushing rollers (3), the two crushing rollers (3) are arranged side by side in the inlet hopper (2), the two ends of the crushing roller (3) are rotatably connected with the inner wall of the inlet hopper (2), the outer wall of the inlet hopper (2) is provided with motor, the driving end of the motor is fixedly connected with the crushing roller (3).

3. A novel grinding and screening device as claimed in claim 1, wherein, The grinding assembly further includes guide block (6), the guide block (6) is a positive conical structure, the guide block (6) is fixedly arranged on the top of the grinding block (5).

4. A novel grinding and screening device as claimed in claim 3, wherein, The discharge end of the guide block (6) is located in the groove of the grinding disc (7).

5. A novel grinding and screening device as claimed in claim 1, wherein, The grinding assembly further includes brush (8), the brush (8) is arranged on the outer surface of the grinding block (5) along the generatrix of the conical body of the grinding block (5), the length of the bristles of the brush (8) matches the grinding gap of each group of grinding assemblies.

6. A novel grinding and screening device as claimed in claim 1, wherein, The driving device includes three gear rings (9), first motor (11), rotating shaft (12) and three gears (13), the gear ring (9) is embedded in the side wall of the grinding disc (7), the rotating shaft (12) is rotatably arranged on the outer side of the grinding box (1) through the mounting plate (10), the first motor (11) is fixedly arranged on the top of the mounting plate (10), the driving end of the first motor (11) is fixedly connected with the top end of the rotating shaft (12), the gear (13) is fixedly arranged on the rotating shaft (12), the side wall of the grinding box (1) is provided with square hole for the gear (13) to pass through, the gear (13) passes through the square hole and engages with the gear ring (9).

7. A novel grinding and screening device as claimed in claim 1, wherein, The screening device further comprises a vibration exciter (15) and a damping assembly, the vibration exciter (15) is fixedly arranged at the bottom of the higher end of the screen plate (14), the damping assembly is fixedly arranged on the inner wall of the grinding box (1), and the two ends of the screen plate (14) are fixedly connected with the top of the damping assembly.

8. A novel grinding and screening device as claimed in claim 7, wherein, The damping assembly comprises a fixed seat (16) and a spring damper (17), the fixed seat (16) is fixedly arranged on the inner wall of the grinding box (1), the spring damper (17) is fixedly arranged on the top of the fixed seat (16), and the top of the spring damper (17) is fixedly connected with the screen plate (14).

9. A novel grinding and screening device as claimed in claim 1, wherein, The recycling device comprises a shell (19), an auger (20) and a second motor (21), the shell (19) is arranged obliquely, the auger (20) is rotatably arranged in the shell (19), and the second motor (21) is fixedly arranged at the top of the higher end of the shell (19); the driving end of the second motor (21) is fixedly connected with the shaft of the auger (20).

10. A novel grinding and screening device as claimed in claim 1, wherein, The guide vane (22) is provided with a baffle (23) on both sides.

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