CN2478680Y - Improved sand mill - Google Patents

Abstract

The utility model relates to a sander for grinding of materials, particularly for high viscosity materials, which comprises an internal rotor, an external stator, and a dynamic separator of dynamic and static ring type for the gap grinding cavity and the exhaust cavity. The rotor and the stator are of cylinder shape, and the dynamic separator is arranged on the small end of the cylinder. Agitating elements are regularly arranged on the inner wall of the stator and the out wall of the rotor. This sander has avoided encapsulation of high viscosity materials during grinding, and prevented medium from blocking the outlet, which may otherwise cause excessive wearing to the dynamic separator. Furthermore, cooling devices can be easily arranged on the rotor, ensuring a timely heat exhausting and maintenance of operation temperature. The sander has advantages of a simple structure and a low cost, widely applied to crushing and grinding for medium, low and high viscosity materials in chemicals, coatings, inks, etc.

Description

A kind of improved sand mill

The utility model relates to a kind of lapping device, refers in particular to the sand mill that can be applicable to that high-viscosity material grinds.

At present, the sand mill on the market has open type sand mill, hermetic type disk sand mill, hermetic type dual channel sand mill etc. by its structure branch.The open type sand mill; as Chinese patent CN91202608; be characterized in that rotor is a disc dispersion impeller structure; dynamic separator is the screen cloth type; though the sand mill of open type discharging is simple in structure; easy to maintenance; applicable to domestic chemical industry; the general grinding of industries such as coating; but existing, its open type operation pollutes greatly; the defective that kinetic energy density is low; in addition; the screen cloth mesh is easily stopped up by material and makes this sand mill can not be applied to full-bodied improved grinding; therefore open type sand mill grinding efficiency is low; for improving grinding efficiency; the contaminated solution problem; hermetic type disk sand mill has appearred; be characterized in that dynamic separator changes mesh structure for moving; stationary ring clearance-type structure; making grinding chamber is hermetic type; realize the discharging of airtight band pressure; with respect to the open type sand mill; its kinetic energy density height; the packing density of abrasive media is big; the grinding dispersion effect is better; more improved disc sander; as on the rotating disk cylindrical, offering axial groove; configuration cylindrical roller (Chinese patent CN96229567) in the groove is and for example at the inwall of stator; the rod pin is set on the circumference of rotor, makes grinding efficiency improve constantly; in being highly suitable for; low viscosity (＜10Pa.s) improved grinding; (＞15Pa.s) material along with the raising of sand cylinder pressure and the quickening of flow velocity, easily produces material parcel phenomenon but for high viscosity; cause the instability of material rate of dispersion and fineness; inhomogeneous; simultaneous problem also has dynamic separator to lack protection, and the abrasive media discharge end that blocks up is moving; stationary ring is easy to wear; in addition; rotor does not possess cooling device, and a large amount of heats that produce in the process of lapping can not in time be got rid of, and can't guarantee normal operating temperature.Chinese patent CN98123476 discloses a kind of " mixer grinder ", belong to hermetic type dual channel sand mill, it comprises an annular circumferential shape outer grinding chamber and an interior grinding chamber, the outer grinding chamber is made of external stator and rotor outer wall, interior grinding chamber is made of rotor inner wall and inner stator, grinding chamber links to each other with deflection chamber, outer grinding is equipped with agitating element in the chamber, interior grinding chamber wall is smooth, do not have agitating element, the cross section in outer grinding chamber is obviously greater than the cross section of interior grinding chamber, the advantage of this kind grinder is that material and abrasive media are under the rotor strong agitation, force material and abrasive media along interior, runner between external stator and the rotor circulates, and under the centrifugal action that when rotor rotates, produces, the outlet of abrasive media along the inwall of rotor from rotor top is thrown out of outside the rotor, participate in circulation shear next time, and thin material in the material discharged from the dynamic separator of stator, avoided abrasive media directly to contact with dynamic separator, reduced the wearing and tearing and the obstruction of dynamic separator, it is more even stable to have improved grinding efficiency and fineness of dispersion; The deficiency of this kind grinder is that manufacture difficulty is big, starts difficulty, and the inside and outside wall of rotor all is subjected to the friction of material and abrasive media, and wear extent is big, maintenance of equipment expense height, and in addition, owing to do not have cooling device, cooling effect is poor.

The utility model is just in order to overcome above-mentioned deficiency, provide a kind of simple in structure, cost is low, grind the good sand mill of dispersion effect, has solved parcel phenomenon and abrasive media the block up problem of discharging opening of high-viscosity material when grinding.

Be outside the improvement of the present utility model to change the stator of sand mill into the truncated cone-shaped cylindrical shell, rotor structure also changes over the truncated cone-shaped cylindrical shell.Specifically, a kind of improved sand mill, the sound ring type dynamic separator that comprises inner rotator, outer stator and interval grinding chamber and discharge chamber, it is characterized in that rotor and stator are the truncated cone-shaped cylindrical shell, dynamic separator is installed on the little head end of two round cylindrical shell, evenly is equipped with agitating element on stator inner wall and the rotor outer wall.The truncated cone-shaped rotor is under rotating at a high speed, produce strong mixing effect, drive abrasive media and force to enter in the material flow, simultaneously because the rotor and the distance between the stator of truncated cone-shaped are very little, greatly optimize the grinding effect of workspace, thoroughly solved the material parcel phenomenon of conventional sand mill; The design of truncated cone-shaped rotor, stator structure, rotor is successively decreased to discharge end by feed end gradually to the active force of abrasive media, help abrasive media and form good circulation in the workspace, solved the abrasive media discharging position that blocks up, cause the over worn scarce limit of dynamic separator parts.

Truncated cone-shaped stator of the present utility model has cooling water jecket, the truncated cone-shaped cylindrical shell of band cooling chamber in the middle of rotor also is designed to, make stator, internal rotor all can connect recirculated cooling water, sand mill has strong cooling effect, can take away a large amount of heats that produce in the process of lapping rapidly, keep and produce required operating temperature.

The rotating ring periphery of the utility model dynamic separator is provided with equally distributed slit, and the slit can increase the discharging area, alleviates the operating pressure in the grinding chamber, thereby protects static seal effectively.

Have additional a coaxial batch mixing pan between dynamic separator of the present utility model and the rotor; material is through dynamic separator the time like this; at a high speed the centrifugal force that produces of the throwing impeller of rotation and rotating ring can get rid of big material in the material and abrasive media to stator inner wall; protected dynamic separator effectively, it is not smooth to have reduced the discharging that causes because of coarse granule obstruction dynamic separator.

Also be equipped with a coaxial batch mixing pan in the discharge chamber of the utility model dynamic separator front end, its effect is to utilize centrifugal force to help material to discharge, and alleviates axial seal pressure, prolongs the service life of axle envelope.

The stub end bottom of the utility model truncated cone-shaped stator is provided with the stop-off device, after rotor runs well, can adjust the loading density of abrasive media at any time according to the performance of different material, thereby reach optimal grinding dispersion effect.

Convenient for sand mill is started, the utility model generally is designed to horizontal type structure because starting current is subjected to the influence of abrasive media gravity, when horizontal the suffered influence of starting current less, help the startup of sand mill.

The utility model is owing to adopt the two round stator; rotor structure; not only solved parcel phenomenon and abrasive media the block up problem of discharging opening excessive wear dynamic separator of high-viscosity material when grinding; also be convenient to rotor cooling device is installed; guarantee in time to get rid of heat; keep operating temperature; in addition; setting up of the improvement of dynamic separator and rear and front end batch mixing pan; effectively protected static seal; prolonged the service life of product; this device structure is simple and easy, and cost is low, applicable to chemical industry; coating; low in the industries such as printing ink; in; the pulverizing of high-viscosity material is ground.

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is the structural representation of the utility model dynamic separator.

Fig. 3 is A-A figure.

Further specify the utility model below in conjunction with embodiment.

Embodiment 1, a kind of improved sand mill, horizontal the laying of truncated cone-shaped cylindrical shell stator (3) that inner truncated cone-shaped cylindrical shell rotor (1) and outside have cooling water jecket (2), the dynamic separator of sound ring type (4) is installed on the little head end of cylindrical shell, its front end is discharge chamber (5), the rear end promptly is the grinding chamber (6) that rotor (1), stator (3) constitute, be cut with the tens of seam seams (7) that are evenly distributed on the rotating ring of dynamic separator (4), also weigh up hopper, evenly be equipped with alloy bar pin (8) at a certain distance on stator (3) inwall and rotor (1) outer wall.

Embodiment 2, reference example 1, rotor (1) inside is equipped with and connects the cooling chamber (9) of cooling circulating water, the rear end of dynamic separator (4), be between itself and the rotor (1) a coaxial batch mixing pan (10) to be set, front end promptly also is equipped with a coaxial batch mixing pan (11) in discharge chamber (5).

Embodiment 3, reference example 2, and the stub end bottom (12) of stator (3) is provided with stop-off device (13).

Claims (9)

1. improved sand mill, the sound ring type dynamic separator that comprises inner rotator, outer stator and interval grinding chamber and discharge chamber, it is characterized in that rotor and stator are the truncated cone-shaped cylindrical shell, dynamic separator is installed on the little head end of two round cylindrical shell, evenly is equipped with agitating element on stator inner wall and the rotor outer wall.

2. sand mill according to claim 1 is characterized in that stator is the truncated cone-shaped cylindrical shell that has cooling water jecket.

3. sand mill according to claim 1 and 2 is characterized in that rotor is the truncated cone-shaped cylindrical shell of middle band cooling chamber.

4. sand mill according to claim 3 is characterized in that the agitating element of all putting on stator inner wall and the rotor outer wall is the alloy bar pin.

5. sand mill according to claim 4 is characterized in that the rotating ring periphery of dynamic separator is provided with equally distributed slit.

6. sand mill according to claim 5 is characterized in that having additional between dynamic separator and the rotor a coaxial batch mixing pan.

7. according to claim 5 or 6 described sand mills, it is characterized in that being provided with a coaxial batch mixing pan in the discharge chamber of dynamic separator front end.

8. sand mill according to claim 7 is characterized in that the stub end bottom of stator is provided with the stop-off device.

9. sand mill according to claim 8 is characterized in that sand mill is a horizontal type structure.

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