CN222510988U - Dry fine sand grinding sand making machine - Google Patents

Abstract

The utility model discloses a dry fine sand grinding sand making machine which comprises a grinding machine support, a speed reduction driving machine arranged on the grinding machine support, a movable grinding disc arranged on the grinding machine support and driven to rotate by the speed reduction driving machine, a top cover plate arranged on the top of the grinding machine support, a fixed grinding disc arranged on the top cover plate and positioned above the movable grinding disc, a spacing pull rod with one end locked on the fixed grinding disc and the other end penetrating through and hanging on the top cover plate, a pressure disc spring arranged between the top cover plate and the fixed grinding disc and pushing the fixed grinding disc to press downwards, an annular cavity type collecting hopper arranged around the periphery of the movable grinding disc, a feeding hole arranged on the fixed grinding disc, and a feeding hopper arranged on the top cover plate and butted with the feeding hole. The upper grinding disc is a fixed grinding disc, can float up and down, and can adjust the lower limit position of the fixed grinding disc, thereby adjusting the gap between the movable grinding disc and the fixed grinding disc and estimating the reaction force of the grinding disc, and enabling the granularity of the finished product to be controllable.

Description

Dry fine sand grinding sand making machine

Technical Field

The utility model relates to a sand making and grinding technology, in particular to a dry fine sand grinding and sand making machine.

Background

River sand with the diameter of less than 5mm is needed to be used in the production of the dry-mixed mortar, and sand purchased by a dry-mixed mortar production enterprise contains more sand (namely sand heads) exceeding the particle diameter. The conventional method is to accumulate sand with the particle size exceeding that of the sand head, and then crush the sand with an impact sand making machine when the accumulated sand head is large. On the one hand, the sand head occupies a large amount of sites, the storage time is long, the loss of environmental protection and material moisture regain is also faced, on the other hand, the investment of the traditional crushing equipment is also relatively large, and the continuous large-scale crushing treatment is generally carried out on a large number of sand heads. At present, the crushing modes of the crusher on the market mainly comprise 3 types, namely centrifugal impact, hammer beating and roller extrusion, the power consumption is large, and the particle size and the particle shape of the finished product are not beneficial to control.

The utility model patent CN 215541329U-a grinding sand making machine for dry mixed mortar production and processing discloses a grinding sand making machine, wherein a base of the grinding sand making machine is provided with a lower grinding disc fixedly connected with the grinding machine, an upper grinding disc matched with the lower grinding disc, and gears are arranged around the peripheral edge of the upper grinding disc and drive the upper grinding disc to rotate through the rotation of the gears. Because its lower mill is fixed to be set up, goes up the mill and sets up gear drive structure to be difficult to adjust the clearance between mill and the lower mill, can't satisfy the required mill clearance adjustable requirement of production, can't go adjusting the fit clearance of equipment according to the sand production requirement particle diameter.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model aims to provide a dry fine sand grinding sand making machine with adjustable grinding disc gap and grinding disc pressure.

In order to solve the technical problems, the technical scheme includes that the dry fine sand grinding sand making machine comprises a grinding machine support, a speed reduction driving machine arranged on the grinding machine support, a movable grinding disc arranged on the grinding machine support and driven to rotate by the speed reduction driving machine, a top cover plate arranged on the top of the grinding machine support, a fixed grinding disc arranged on the top cover plate and positioned above the movable grinding disc, a distance limiting pull rod with one end locked on the fixed grinding disc and the other end penetrating through and hanging on the top cover plate, a platen spring arranged between the top cover plate and the fixed grinding disc and used for pushing the fixed grinding disc to press downwards, an annular cavity type collecting hopper arranged around the periphery of the movable grinding disc, a feeding hole arranged on the fixed grinding disc, and a feeding hopper arranged on the top cover plate and butted with the feeding hole.

As an improvement of the technical scheme of the dry fine sand grinding sand making machine, the disc surfaces of the movable millstone and the fixed millstone are provided with concave-convex tooth surfaces formed by constructing parallel tooth lines.

As an improvement of the technical scheme of the dry fine sand grinding sand making machine, the disc surfaces of the movable millstone and the fixed millstone are divided into a plurality of sectors, and tooth lines which are parallel to each other and extend to the circumferential surface of the millstone are arranged on the disc surface in a single sector.

As an improvement of the technical scheme of the dry fine sand grinding sand making machine, the tooth lines are parallel to the contour edge of one side of the sector, and the tooth lines of all the sectors are parallel to the contour edge of the same side.

As an improvement of the technical scheme of the dry fine sand grinding sand making machine, the central angles of the sectors are the same, tooth lines of the adjacent sectors are rotationally overlapped, and a discharge groove is arranged between the sectors.

As an improvement of the technical scheme of the dry fine sand grinding sand making machine, the tooth line extending direction of the fixed grinding disc and the movable grinding disc is the same on the front surface where the fixed grinding disc and the movable grinding disc are opened and displayed.

As an improvement of the technical scheme of the dry fine sand grinding sand making machine, a fixed grinding disc seat plate is attached to the upper side of a fixed grinding disc, the fixed grinding disc seat plate and the fixed grinding disc are locked together through bolts, a movable grinding disc seat plate is attached to the lower side of the movable grinding disc, the movable grinding disc seat plate and the movable grinding disc are locked together through bolts, the movable grinding disc seat plate is fixedly connected with an output shaft of a speed reduction driver, the distance limiting pull rod is a screw rod, one end of the screw rod is provided with an end cap fixedly connected with the fixed grinding disc seat plate, and the other end of the screw rod penetrates through the top cover plate and is spirally sleeved with a nut so as to adjust the length of the screw rod in the top cover plate.

As an improvement of the technical scheme of the dry fine sand grinding sand making machine, the inner side annular wall surface of the collecting hopper is positioned at the inner side of the lower edge of the outer circumferential surface of the movable grinding disc, and the outer side annular wall surface of the collecting hopper extends upwards and forms a closed mill cavity with the top cover plate.

As an improvement of the technical scheme of the dry fine sand grinding sand making machine, the upper edge part of the inner side annular wall surface of the collecting hopper is connected with an elastic wear-resistant annular sheet which abuts against the bottom surface of the movable grinding disc, the bottom surface of the collecting hopper is obliquely arranged, and a discharge port is arranged at the lowest position of the collecting hopper towards the outer side.

As an improvement of the technical scheme of the dry fine sand grinding sand making machine, the feeding hole is positioned at a position which is deviated from the center distance of the grinding disc of the fixed grinding disc by 250 mm.

The utility model has the beneficial effects that the dry fine sand grinding sand making machine is driven by the speed reduction driver, the movable millstone positioned at the lower side rotates, and the movable millstone cooperates with the fixed millstone at the upper side to shear and rub the materials between the two millstones, so as to crush the granular materials. The upper grinding disc is a fixed grinding disc, is not fixedly arranged, but is arranged in a floating mode, is not rotatable, can float up and down, can adjust the up and down position of the upper grinding disc, and can limit the lower limit position of the grinding disc by adjusting the up and down movement of the distance limiting pull rod, so that the gap between the movable grinding disc and the fixed grinding disc is adjusted. The clearance of the grinding disc is adjustable, so that the requirement of producing different material particle sizes is met, the produced material particle size is large if the clearance is large, and the produced material particle size is small if the clearance is small, so that the granularity of the finished product is controllable. The larger the gap between the grinding discs is, the larger the compression amount of the springs is, and then the reaction force of the spring top estimated grinding disc is larger, so that the method is more beneficial to crushing materials with larger particle sizes.

Drawings

FIG. 1 is a schematic view showing a forward cross-sectional structure of a dry fine sand grinding and sand making machine according to the present utility model.

Fig. 2 is a partial enlarged view of the area a in fig. 1.

Fig. 3 is a schematic diagram of the disc surface structure of the movable millstone.

Fig. 4 is a schematic diagram of a perspective disk surface structure of a movable grinding disk and a fixed grinding disk overlapped.

Detailed Description

Specific embodiments of the present utility model will be further described below with reference to the accompanying drawings.

As shown in fig. 1, 2, 3 and 4, the dry fine sand grinding sand making machine of the utility model comprises a grinding machine bracket 11, a speed reduction driving machine 12 arranged on the grinding machine bracket 11, a movable grinding disc 22 arranged on the grinding machine bracket and driven to rotate by the speed reduction driving machine, a top cover plate 31 arranged on the top of the grinding machine bracket, a fixed grinding disc 33 arranged on the top cover plate 31 and positioned above the movable grinding disc, a distance limiting pull rod 35 with one end locked on the fixed grinding disc 33 and the other end penetrating and hanging on the top cover plate 31, a pressure disc spring 36 arranged between the top cover plate 31 and the fixed grinding disc 33 and pressing the fixed grinding disc 33 downwards, an annular cavity type collecting hopper 51 arranged around the periphery of the movable grinding disc 22, a feeding hole 38 arranged on the fixed grinding disc 33, and a feeding hopper 39 arranged on the top cover plate 31 and butted with the feeding hole 38. The dry fine sand grinding sand making machine is driven by the speed reduction driver 12, the movable millstone 22 positioned at the lower side rotates, and the movable millstone 22 cooperates with the fixed millstone 33 at the upper side to perform shearing and friction movements on materials between the two millstones, so that the particle materials are crushed. The lower grinding disc is a movable grinding disc 22 which can rotate but can not float/jump up and down and is axially immovable, while the upper grinding disc is a fixed grinding disc 33 which is not fixedly installed but can not rotate but can float up and down and can adjust the up and down position thereof, and the lower limit position of the grinding disc 33 is limited by the up and down movement of a distance limiting pull rod 35 so as to adjust the gap between the movable grinding disc 22 and the fixed grinding disc 33. The clearance of the grinding disc is adjustable, so that the requirements of producing different material particle sizes are met, the produced material particle size is large when the clearance is large, the produced material particle size is small when the clearance is small, the discharge particle size is adjusted by controlling the clearance of the grinding disc, and the finished product particle size is controllable. The larger the gap between the grinding discs is, the larger the compression amount of the spring is, and the larger the reaction force of the pressure plate spring 36 pushing the fixed grinding disc 33 is, which is more beneficial to crushing the materials with larger particle size. The lower grinding disc is a movable grinding disc 22, and the lower grinding disc is rotated during operation, so that a certain centrifugal force effect can be formed on materials borne by the lower grinding disc, a trend of throwing out the materials is formed, the materials are placed between the grinding discs and accumulated at a position close to the center, and the materials are better pushed to be pushed out towards the periphery of the lower grinding disc.

The fine sand grinding device is used for presetting the gap between the movable grinding disc 22 and the fixed grinding disc 33 according to the requirement of the discharge granularity before working. The working process pushes the fixed grinding discs 33 downwards through the pressure disc springs 36 to enable gaps between the grinding discs to be prone to minimum gaps, so that materials can be crushed by the grinding discs in the pushing process between the grinding discs to obtain material particles with certain granularity, the energy consumption in the working process is low, and the minimum gaps between the grinding discs are controlled, so that the particle type of the materials obtained after the materials processed by the grinding discs with limited gaps roll for a certain distance in the grinding discs is more round.

The fine sand grinding sand making machine of this model, the upper portion is fixed mill, the lower part is movable mill, movable mill 22 is by motor and the speed reducer drive of bottom (the speed reduction driving machine 12 is including producing motor 28 of motive power and playing the speed reducer 29 of transmission effect), mill support 11 has born actuating system, grinding device, broken cavity simultaneously, the integral type design, do not need to do extra basic construction any more for this model is small, the consumption is low, but single platform arrangement, also can multiple devices is arranged in groups, the production enterprise only need according to self productivity demand rational arrangement can, handle the sand head that produces at any time.

The disc surfaces of the movable millstone 22 and the fixed millstone 33 are concave-convex tooth surfaces formed by constructing parallel tooth lines 23, and the concave-convex tooth surfaces can crush materials more effectively during working, so that the generation of powder is reduced, and the gap setting between the millstones is also effective structural setting for avoiding the generation of powder.

Further, the disc surfaces of the movable millstone 22 and the fixed millstone 33 are divided into a plurality of sectors, and the tooth trace 23 parallel to and extending to the circumference surface of the millstone is arranged on the disc surface in a single sector, so that a plurality of tooth trace arrangement patterns with the same rule can be constructed. In the process of rotating the movable millstone 22, the tooth trace 23 of the two millstones are crossed into a scissor shape, so that the tooth edge of the tooth trace 23 can be used for applying shearing force and friction force to raw materials, the crushing efficiency is higher, and the power consumption is lower. The toothed profile 23 extends to the periphery of the grinding disc so that the crushed and barred material falls out of the edge. Wherein the profile of extension of the tooth trace 23 may be linear, arcuate, S-shaped, etc.

Specifically, the tooth trace 23 is parallel to the contour edge of one side of the sector, one tooth trace is arranged next to/along the contour edge, the other tooth trace is sequentially and parallelly spread out to form a set of tooth grooves side by side, and each tooth groove is used for discharging at the peripheral surface opening of the grinding disc. The tooth lines of all the sectors are parallel to the contour edges of the same side, so that the arrangement rules of the tooth lines in all the sectors are the same, the tooth lines of two millstones are convenient to construct a scissor shape, and the whole millstone surface constructs a shearing structure with the tooth edges crossed with each other. If the profile edge extends straight, the profile edge is the radius of the movable/stationary disc.

Further, the central angles of the sectors are the same, the tooth lines of the adjacent sectors are rotationally coincident, that is, the tooth lines are uniformly distributed, that is, the sectors are divided at equal angles in the circumferential direction of the disc surfaces of the fixed millstone 33 and the movable millstone 22, and the sectors are uniformly partitioned, that is, the position points forming the crossed shear structure can be uniformly distributed on the disc surfaces between the millstones, so that the crushing and barreling are more uniform, and the stress of the millstone is more uniform.

Wherein, be equipped with the discharge groove 25 between the sector for the material can roll the transfer between different sectors through discharge groove 25, reaches the material that the particle diameter required and can release between discharge groove 25, reaches the effect of evenly distributed material.

Wherein, on the front surface where the fixed grinding disc 33 and the movable grinding disc 22 are opened and displayed, the extending directions of the tooth lines 23 of the fixed grinding disc 33 and the movable grinding disc 22 are the same, that is, the extending tracks of the tooth lines 23 of the fixed grinding disc 33 and the movable grinding disc 22 are the same, when the fixed grinding disc 33 and the movable grinding disc 22 are combined with each other, the disc surfaces of the fixed grinding disc 33 and the movable grinding disc 22 are exactly symmetrically turned 180 degrees, so that the tooth lines 23 of the fixed grinding disc 33 and the movable grinding disc 22 form shearing angles with each other, and the shearing structural points are distributed on the whole disc surfaces in a dispersing way.

The fixed grinding disc 33 is provided with a fixed grinding disc seat board 32 in a fitting mode on the upper side, the fixed grinding disc seat board 32 and the fixed grinding disc 33 are locked together through bolts, the movable grinding disc seat board 21 is provided with the movable grinding disc 22 in a fitting mode on the lower side, the movable grinding disc seat board 21 and the movable grinding disc 22 are locked together through bolts, the movable grinding disc seat board 21 is fixedly connected with an output shaft 26 of the speed reduction driver 12, the distance limiting pull rod 35 is a screw rod, one end of the screw rod is provided with an end cap fixedly connected with the fixed grinding disc seat board 32, the other end of the screw rod penetrates through the top cover plate 31, and nuts are sleeved on the screw rod in a spiral mode, so that the length of the screw rod in the top cover plate 31 is adjusted. The length of the screw rod in the top cover plate 31 determines the gap between the fixed grinding disc 33 and the movable grinding disc 22, and the nut is positioned on the top cover plate 31, namely, the lifting of the screw rod can be adjusted by screwing the nut outside, so that the gap between the fixed grinding disc 33 and the movable grinding disc 22 is set or changed, and the material with the required particle size is obtained.

The inner annular wall surface 52 of the collecting hopper 51 is located at the inner side of the lower edge of the outer circumferential surface of the movable grinding disc 22, so that the materials discharged from the periphery of the movable grinding disc 22 can directly fall into the collecting hopper 51, and the outer annular wall surface 53 of the collecting hopper 51 extends upwards and encloses a closed grinding machine cavity with the top cover plate 31, so that the fixed grinding disc 33 and the movable grinding disc 22 are arranged in the sealed cavity, and the environment friendliness is stronger. Of course, the movable millstone seat plate 21 of the movable millstone 22 may also serve as a partial enclosure wall of the mill cavity.

Further, an elastic wear-resistant ring 55 for abutting against the bottom surface of the movable grinding disc 22 is connected to the upper edge of the inner annular wall 52 of the collecting hopper 51, so that the sealing performance of the mill cavity is improved, dust can be prevented from overflowing better, the detachable wear-resistant ring 55 can be replaced when worn, the bottom surface of the collecting hopper 51 is obliquely arranged, and a discharge outlet 56 is arranged at the lowest position of the collecting hopper 51 towards the outer side. The principle of operation of the machine is thus that the material flows down from the feed opening 38 and into the gap between the stationary and movable grinding discs 33, 22 by means of circular movement of the grinding disc with the toothed track 23, the material is driven by the lower grinding disc/movable grinding disc 22 in the tangential and toothed directions of the grinding disc and finally falls down from the edge of the lower grinding disc/movable grinding disc 22 and is discharged through the chute below the mill cavity.

Wherein the feed hole 38 is positioned at a position which is deviated from the center distance of the grinding disc of the fixed grinding disc 33 by 250 mm. The feed hole 38 is established to the fixed mill 33, namely go up the mill, and feed hole 38 runs through the mill, and feed hole 38 sets up in the 250 mm's of departure mill centre of a circle position, prevents that the material from piling up at the mill center and can't be broken, and the time that the maximum extension material kept in the mill simultaneously.

The foregoing description of the preferred embodiments of the present utility model is not intended to limit the scope of the claims, which follow, as defined in the claims.

Claims (10)

1. A dry fine sand grinding sand making machine is characterized by comprising a mill support, a speed reduction driver arranged on the mill support, a movable millstone arranged on the mill support and driven to rotate by the speed reduction driver, a top cover plate arranged on the top of the mill support, a fixed millstone arranged on the top cover plate and positioned above the movable millstone, a spacing pull rod with one end locked on the fixed millstone and the other end penetrating through and hanging on the top cover plate, a platen spring arranged between the top cover plate and the fixed millstone and pushing the fixed millstone to press downwards, an annular cavity type collecting hopper arranged around the periphery of the movable millstone, a feeding hole arranged on the fixed millstone, and a feeding hopper arranged on the top cover plate and butted with the feeding hole.

2. The dry fine sand grinding sand making machine according to claim 1, wherein the surface of the movable grinding disc and the fixed grinding disc is provided with concave-convex tooth surfaces formed by constructing side-by-side tooth lines.

3. The dry fine sand grinding and sand making machine according to claim 2, wherein the surface of the movable grinding disc and the fixed grinding disc are divided into a plurality of sectors, and the surface of the single sector is provided with tooth lines which are parallel and extend to the circumferential surface of the grinding disc.

4. A dry fine sand grinding and sand making machine according to claim 3 characterized in that the tooth line is parallel to the contour edge of one side of the sector, and the tooth lines of all the sectors are parallel to the contour edge of the same side.

5. The dry fine sand grinding and sand making machine according to claim 3, wherein the central angles of the sectors are the same, tooth lines of the adjacent sectors are rotationally overlapped, and a discharge groove is arranged between the sectors.

6. The dry fine sand grinding and sand making machine according to claim 4 or 5, characterized in that the tooth trace of the fixed grinding disc and the movable grinding disc extend in the same direction on the front surfaces where the fixed grinding disc and the movable grinding disc are opened and displayed.

7. The dry fine sand grinding sand making machine according to claim 1, wherein a fixed grinding disc seat plate is attached to the upper side of the fixed grinding disc, the fixed grinding disc seat plate and the fixed grinding disc are locked together through bolts, a movable grinding disc seat plate is attached to the lower side of the movable grinding disc, the movable grinding disc seat plate and the movable grinding disc are locked together through bolts, the movable grinding disc seat plate is fixedly connected with an output shaft of a speed reduction driver, the distance limiting pull rod is a screw rod, one end of the screw rod is provided with an end cap fixedly connected with the fixed grinding disc seat plate, and the other end of the screw rod penetrates through the top cover plate and is spirally sleeved with a nut so as to adjust the length of the screw rod within the top cover plate.

8. The dry fine sand grinding and sand making machine according to claim 1, characterized in that the inner side annular wall surface of the collecting hopper is positioned at the inner side of the lower edge of the outer circumferential surface of the movable grinding disc, and the outer side annular wall surface of the collecting hopper extends upwards and forms a closed mill cavity with the top cover plate.

9. The dry fine sand grinding and sand making machine according to claim 8, wherein an elastic wear-resistant ring piece which abuts against the bottom surface of the movable grinding disc is connected to the upper edge part of the inner side annular wall surface of the collecting hopper, the bottom surface of the collecting hopper is obliquely arranged, and a discharge port is arranged at the lowest position of the collecting hopper towards the outer side.

10. The dry fine sand grinding and sand making machine according to claim 1, characterized in that the feeding hole is positioned at a position which is deviated from the center of the grinding disc of the fixed grinding disc by 250 mm.