CN110270394B - Aggregate crushing device and method - Google Patents

Abstract

The invention discloses an aggregate crushing device, which comprises a preliminary crushing assembly, a groove body arranged below a discharge hole of the preliminary crushing assembly, a bracket transversely fixed on the groove body, and a plurality of polishing assemblies arranged on the bracket, wherein each polishing assembly comprises a micro motor, a rotating shaft with the lower end fixedly connected with the output end of the micro motor and a sleeve sleeved on the rotating shaft; an output shaft of the miniature motor is connected with the bracket through a bearing; each rotating shaft is distributed on the bracket at equal intervals, and the machine bodies of adjacent micro motors are connected through connecting pieces. The aggregate is initially crushed through the initial crushing assembly, the surface of the initially crushed aggregate is polished by the polishing assembly in the tank body, the polished aggregate is higher in particle roundness, the surface is relatively smooth, uniform mixing is facilitated, the surface area of the aggregate is small, the mixing water consumption and the consumption of cementing materials are reduced, the drying period is shortened, and the stacking porosity is low. The aggregate obtained by the crushing method has good particle shape and smoother surface.

Description

Aggregate crushing device and method

Technical Field

The invention relates to the field of building material processing, in particular to an aggregate crushing device and an aggregate crushing method.

Background

Also known as "aggregate". Granular materials which play a role of framework and filling in concrete and mortar. There are two kinds of fine aggregate and coarse aggregate. Natural sand such as river sand, sea sand, valley sand and the like is generally adopted, and when the natural sand is lacking, artificial sand ground by hard rock can be used; the particle diameter of the coarse aggregate is larger than 5mm, broken stone and pebble are commonly used, under the same condition, the strength of broken stone concrete is higher than that of pebble concrete, but broken stone is formed by crushing rock, and the cost is higher than that of pebble. The common coarse aggregate in the lightweight aggregate concrete is natural porous rock such as pumice, and artificial porous aggregate such as ceramsite and expansion slag. The crushing device adopted in the prior art mainly comprises the following components: the jaw crusher crushes the aggregate through double-elbow swing, and the treated needle-shaped aggregate has higher content; the cone crusher extrudes aggregate through the rotation and swing of the eccentric rotating movable cone, and the processed aggregate particles are superior to the jaw crusher; the hammer crusher rotates a rotary hammer by a rotor, and the aggregate is broken by the impact of the rotary hammer during high-speed rotation. The three common crushers directly crush the aggregates, and the crushed aggregates are poor in particle type and rough in surface. Therefore, there is a need for an aggregate crushing device and a crushing method which are good in particle shape after crushing and smooth in surface.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide an aggregate crushing device and an aggregate crushing method with good particle shape and smooth surface after crushing.

The invention adopts the following technical scheme:

the aggregate crushing device comprises a preliminary crushing assembly, a tank body arranged below a discharge hole of the preliminary crushing assembly, a bracket transversely fixed on the tank body, and a plurality of polishing assemblies arranged on the bracket, wherein each polishing assembly comprises a micro motor, a rotating shaft with the lower end fixedly connected with the output end of the micro motor and a sleeve sleeved on the rotating shaft; an output shaft of the miniature motor is connected with the bracket through a bearing; each rotating shaft is distributed on the bracket at equal intervals, and the machine bodies of adjacent micro motors are connected through connecting pieces.

In one specific embodiment of the invention, the upper end of the rotating shaft is provided with a limiting piece, the upper end of the sleeve is closed, the upper end of the sleeve is provided with a limiting groove corresponding to the position of the limiting piece, the limiting piece can be embedded in the limiting groove, and the central axis of the limiting piece is not collinear with the central axis of the rotating shaft.

In one specific embodiment of the invention, the transverse section of the groove body is annular, and the axis of the rotating shaft is parallel to the axis of the groove body.

In one specific embodiment of the invention, the bottom surface of the inner cavity of the tank body is an inclined surface, and the lowest part of the side wall of the tank body, which is close to the inclined surface, is provided with a discharge hole.

In one specific embodiment of the invention, a plurality of through holes are formed in the bottom of the tank body.

In one embodiment of the invention, the preliminary crushing assembly is a cone crusher.

In one specific embodiment of the invention, a spray header is arranged at the opening of the tank body.

The invention also provides a crushing method of the aggregate crushing device, which comprises the following steps:

s1, putting aggregate into a preliminary crushing assembly to crush according to the size of a preset particle size, and discharging crushed aggregate into a tank body through a discharge hole of the preliminary crushing assembly;

s2, starting the micro motors, wherein the micro motors drive the rotating shafts to drive the sleeves to rotate, and the rotating directions and the rotating speeds of the micro motors are the same;

s3, collecting aggregate falling to the bottom of the tank body from the support.

Compared with the prior art, the invention has the beneficial effects that:

the aggregate is initially crushed through the initial crushing assembly, the surface of the initially crushed aggregate is polished by the polishing assembly in the tank body, the polished aggregate is higher in particle roundness, the surface is relatively smooth, the aggregate rolls easily when being mixed with a concrete mixing material, uniform mixing is facilitated, the surface area of the aggregate is small, the mixing water consumption and the consumption of the cementing material are reduced, the drying period is shortened, the stacking porosity is low, more aggregate can be contained in the same volume, and the structural strength of the dried concrete is ensured. The aggregate obtained by the crushing method has good particle shape and smoother surface.

Drawings

Fig. 1 is a schematic structural view of an aggregate crushing device.

Fig. 2 is a schematic diagram of the mounting structure of the bracket and the tank.

10, a cone crusher; 20. a tank body; 201. a discharge port; 30. a bracket; 401. a micro motor; 402. a rotating shaft; 403. a sleeve; 404. tapered roller bearings; 50. a connecting piece; 60. and a limiting piece.

Detailed Description

Reference will now be made in detail to the present embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functionality throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1-2, the present embodiment provides an aggregate crushing device, which includes a primary crushing assembly, a tank body 20 disposed below a discharge port of the primary crushing assembly, a bracket 30 transversely fixed on the tank body 20, and a plurality of polishing assemblies disposed on the bracket 30, wherein each polishing assembly includes a micro motor 401, a rotating shaft 402 with a lower end fixedly connected with an output end of the micro motor 401, and a sleeve 403 sleeved on the rotating shaft 402; an output shaft of the micro motor 401 is connected with the bracket 30 through a bearing; the rotating shafts 402 are distributed on the bracket 30 at equal intervals, and the bodies of adjacent micro motors 401 are connected through connecting pieces 50.

The application method and the working principle are as follows:

s1, putting aggregate into a preliminary crushing assembly to crush according to the size of a preset particle size, and discharging crushed aggregate into a tank body 20 through a discharge hole of the preliminary crushing assembly; the construction of the preliminary crushing assembly is prior art, such as jaw crushers, cone crushers 10, hammer stone crushers, and the like.

S2, starting the micro motors 401, wherein the micro motors 401 drive the rotating shafts 402 to drive the sleeves 403 to rotate, and the rotating directions and the rotating speeds of the micro motors 401 are the same; any one rotating sleeve 403 and two adjacent sleeves 403 form regular triangle vertex position distribution, and in the process of aggregate falling, the primarily broken aggregate in the middle is polished, so that the surface is smoother and has better roundness; the three sleeves 403 with the same direction and the same speed avoid that the shearing force of different sleeves 403 on the aggregate causes uneven stress of the aggregate to generate different degrees of crushing so as to influence the roundness; in order to avoid that the suspended micro motor 401 rotates and the sleeve 403 does not rotate due to overlarge polishing resistance, the bodies of the plurality of micro motors 401 are connected into a whole through the connecting piece 50; in order to improve the service life, the bearing may use tapered roller bearings 404, and the polished aggregate falls down from the bottom of the tank 20 through the gap of the bracket 30.

S3, collecting aggregate falling to the bottom of the tank body 20 from the support 30.

In order to facilitate replacement of the sleeve 403, the upper end of the rotating shaft 402 is provided with a limiting member 60, the upper end of the sleeve 403 is closed, the upper end of the sleeve 403 is provided with a limiting groove corresponding to the position of the limiting member 60, the limiting member 60 can be embedded in the limiting groove, and the central axis of the limiting member 60 is not collinear with the central axis of the rotating shaft 402. For aggregate with different granularity, sleeve 403 with different external diameters is replaced, sleeve 403 can be removed only by lifting, the central axis of limiting piece 60 is not collinear with the central axis of rotating shaft 402, i.e. limiting piece 60 is eccentrically arranged, and sleeve 403 can be kept relatively still with rotating shaft 402 when eccentric limiting piece 60 can ensure rotating shaft 402 no matter what shape limiting piece 60 is.

The transverse section of the slot 20 is circular, and the axis of the rotating shaft 402 is parallel to the axis of the slot 20.

The inner wall of the tank body 20 is arc-shaped, and aggregate positioned between the sleeve 403 and the inner wall of the tank body 20 can be polished to a certain degree, so that the roundness is improved.

In order to facilitate the discharge of aggregate, the bottom surface of the inner cavity of the tank body 20 is an inclined surface, and a discharge opening 201 is arranged at the lowest position of the side wall of the tank body 20 adjacent to the inclined surface.

The bottom of the tank 20 is provided with a plurality of through holes. And separating the fine powder generated by polishing after polishing by adopting the through holes.

The primary crushing component is a cone crusher 10, the particle type after primary crushing is relatively regular, the polishing difficulty is reduced, and the particle size is smaller due to the fact that the primary crushing component cannot be excessively crushed.

The shower head is arranged at the opening of the tank body 20, aggregate is wetted by sprinkling water through the shower head to polish, the aggregate is not broken, the polished aggregate has higher smoothness, the water is used for flushing away the fine powder generated by polishing in time, and the surface temperature of the polishing assembly and the aggregate can be effectively reduced. The micro motor 401 is correspondingly waterproof.

The above embodiments are only some of the preferred embodiments of the present invention, and should not be construed as limiting the scope of the present invention, and any insubstantial changes and substitutions made by those skilled in the art on the basis of the present invention are intended to fall within the scope of the present invention as claimed.

Claims (6)

1. The aggregate crushing device comprises a preliminary crushing assembly and is characterized by further comprising a groove body arranged below a discharge hole of the preliminary crushing assembly, a bracket transversely fixed on the groove body, and a plurality of polishing assemblies arranged on the bracket, wherein each polishing assembly comprises a miniature motor, a rotating shaft with the lower end fixedly connected with the output end of the miniature motor and a sleeve sleeved on the rotating shaft; the output shaft of the miniature motor is connected with the bracket through a bearing; each rotating shaft is distributed on the bracket at equal intervals, and the adjacent miniature motor bodies are connected through connecting pieces; the upper end of the rotating shaft is provided with a limiting piece, the upper end of the sleeve is closed, the upper end of the sleeve is provided with a limiting groove corresponding to the position of the limiting piece, the limiting piece can be embedded in the limiting groove, and the central axis of the limiting piece is not collinear with the central axis of the rotating shaft; the transverse section of the groove body is circular, and the axis of the rotating shaft is parallel to the axis of the groove body; the rotation direction and the rotation speed of each micro motor are the same.

2. The aggregate breaker according to claim 1, wherein the bottom surface of the inner cavity of the tank body is an inclined surface, and a discharge opening is arranged at the lowest position of the side wall of the tank body adjacent to the inclined surface.

3. The aggregate breaker according to claim 2, wherein the bottom of the tank is provided with a plurality of through holes.

4. An aggregate crushing device according to claim 1, wherein the primary crushing assembly is a cone crusher.

5. The aggregate breaker of claim 1, wherein the trough opening is provided with a shower head.

6. A crushing method using the aggregate crusher according to any one of claims 1 to 5, comprising the steps of:

s1, putting aggregate into a primary crushing assembly to crush according to the size of a preset particle size, and discharging crushed aggregate into a tank body through a discharge hole of the primary crushing assembly;

s2, starting a micro motor, wherein the micro motor drives a rotating shaft to drive a sleeve to rotate, and the rotating direction and the rotating speed of each micro motor are the same;

s3, collecting aggregate falling to the bottom of the tank body from the support.