JP6556447B2 - Grinder - Google Patents

Description

The present invention relates to a grinding machine for performing sizing of the material of the crushed stone and the like, polishing.

  Generally, in a crushed stone plant, rough stones collected from rough rocks are crushed with a crusher such as a jaw crusher or corn crusher to make a crushed stone of almost the product size, and then the crushed stone is sized and polished to obtain aggregates, etc. It is a product. In the sizing and polishing (assuming rounded corners of the crushed stone), by putting the crushed stone into the casing and rotating the rotor penetrating the casing in the lateral direction (substantially horizontal direction), In some cases, a uniaxial rotating type grinder is used in which crushed stones are rubbed against each other to size and polish.

  In the uniaxial rotation type grinder as described above, a feed port for raw materials such as crushed stone is usually provided at the upper part of the casing, and the feed for the grinder is provided with a chute for feeding the raw material to the feed port above it. An apparatus (hereinafter also simply referred to as “raw material supply apparatus”) is installed. Then, the raw material supplied from the chute of the raw material supply device to one end side of the rotor of the attritor moves toward the other end of the rotor while being sized and polished by the rotation of the rotor, and on the other end side of the rotor A product is discharged from a discharge port provided in a lower part of the casing to the outside as a product (for example, see Patent Document 1).

JP 2003-71317 A

  By the way, in the grinder supplied with the raw material from the raw material supply apparatus as described above, the part near the raw material supply position of the rotor wears faster than the other parts. The accompanying reduction in processing capacity often necessitates rotor maintenance.

  For example, in the case where a large number of hammers (protrusions) for improving the processing capacity are attached to the outer peripheral surface of the rotor, if the wear of the hammer near the raw material supply position of the rotor increases, the raw material stays excessively near the supply position. Processing capacity may be significantly reduced. For this reason, normally, when the processing capacity decreases, the operation of the grinder is stopped, and maintenance is performed to replace the rotor hammer with a new one including one with small wear other than the vicinity of the supply position, This contributes to shortening the service life of the hammer and hindering the extension of the maintenance cycle.

  Then, this invention makes it a subject to prevent the early wear in the raw material supply position vicinity of the rotor which penetrates the casing of a grinder laterally.

In order to solve the above-described problems, the present invention provides a rotor that feeds a raw material from a chute of a raw material supply device installed above a casing to a supply port provided at an upper portion of the casing and penetrates the casing in a lateral direction. by rotating a sizing ingredients in the casing, Oite the grinding machine to perform polishing, than is ash and movable lower end of the chute of the raw material supplying device in the axial direction of the rotor .

In other words, more of the above configuration, the raw material supply position of attritor is dispersed in the axial direction of the rotor, it was to be able to prevent premature wear in the vicinity of the raw material supply position of the rotor.

Here, in the said structure, the chute | shoot of the said raw material supply apparatus is divided | segmented into an upper chute member and a lower chute member, and the said lower chute member is the said upper chute member in the vertical plane parallel to the axial direction of the said rotor. The lower end portion of the chute can be moved along the rotor axial direction by enabling rotation about a support shaft provided in the vicinity of the connection position of the lower chute member.

Further, the present invention, when pre-km over data is one having a plurality of projections on its outer peripheral surface, can be particularly effectively applied.

Grinding machine of the present invention, as described above, the rotor thereof from the lower end of the chute of the raw material supply device is obtained by movable along the axial direction of the rotor of the attritor, raw material supply position of attritor It is possible to reliably prevent early wear in the vicinity of the raw material supply position of the rotor. Therefore, reduction in throughput due to excessive accumulation of material in the Ke pacing is less likely to occur, it is possible to extend the maintenance cycle of the rotor.

Front sectional view showing the grinding machine of the embodiment Left side view of FIG. Sectional view along line III-III in FIG. a and b are explanatory diagrams of the operation of the raw material supply apparatus of FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 3 show a grinder 11 of the embodiment installed on side of the raw material supply apparatus 1. The crusher 11 performs particle sizing and polishing of crushed stone (raw material) introduced into the casing 13 by rotating a rotor 14 that penetrates the casing 13 installed on the gantry 12 in the lateral direction.

  The gantry 12 is fixed to the upper surface of the base frame portion 15, the upper frame portion 16 disposed above the base frame portion 15, and the longitudinal direction of the upper frame portion 16. Supporting columns 17 and 18 that support both ends are provided. The pair of left and right support columns 17 on one end side (right side in FIG. 1) of the gantry 12 has a structure that can be bent in the middle of the height direction, and the pair of left and right support columns 18 on the other end side (left side in FIG. 1). Is not connected to the upper frame portion 16 and is shorter than the support column 17 on one end side. Further, a bearing base 20 on which a bearing 19 for the rotor 14 is installed is fixed to the upper surfaces of both ends of the upper frame part 16, and the bearing base 20 on the other end side of the gantry 12 is connected to the base frame part 15 by a cylinder 21. It is connected. Thereby, during operation of the grinder 11, the cylinder 21 is contracted from the state shown in FIG. 1 (the upper frame portion 16 is substantially horizontal and away from the column 18 on the other end side), and the column on the one end side of the gantry 12. By bending 17, the upper frame portion 16 is inclined until it is supported by the support 18 on the other end side, so that the crushed stone can smoothly move from one end side to the other end side of the grinder 11. It is like that.

  The casing 13 has an outer shape that is rectangular in cross section, and is fixed to the upper frame portion 16 of the gantry 12 by legs 22 provided at the lower portions on the left and right sides. A crushed stone supply port 13a is provided on the upper surface on one end side in the longitudinal direction, a discharge port 13b is provided on the lower surface on the other end side, and two openings 13c for maintenance are provided on the lower surface on one end side than the discharge port 13b. Yes.

  The supply port 13a of the casing 13 is formed so as to extend from the vicinity of one end in the longitudinal direction to the vicinity of the central portion at a position near one side of the casing 13 (left side in FIGS. 2 and 3), and to protrude largely upward. The discharge port 13 b is formed so as to protrude downward from the center of the casing 13 in the width direction. Further, each maintenance opening 13c is normally closed with a lid 23, and the crushed stone remaining in the casing 13 is removed by opening the lid 23 when performing maintenance or the like (a dashed line in FIG. 3). It can be discharged.

  Both ends of the rotor 14 projecting from the casing 13 are rotatably supported by bearings 19 on a bearing base 20 fixed to the upper frame portion 16 of the gantry 12. Then, a pulley 24 is fitted and fixed to the outer periphery of a portion on the axially outer side of the bearing 19 at one end thereof, and a belt is wound around the pulley 24 and a pulley on the motor side (not shown), The driving force is received from the motor.

  In addition, the rotor 14 has hammers (protrusions) 25 protruding radially from the outer peripheral surface thereof at equal intervals in the circumferential direction and in the circumferential direction in the axial direction at a portion in the casing 13 except for the upper portion of the discharge port 13b. Different positions are arranged alternately. The hammer 25 rakes up the crushed stone with the rotation of the rotor 14 and agitates it to promote the sizing and polishing action by friction between the crushed stones.

  The attritor 11 is configured as described above. When the rotor 14 is rotated by the motor, the crushed stone supplied as a raw material from the supply port 13a of the casing 13 is agitated by the hammer 25 on the outer periphery of the rotor 14 in the casing 13. After being sized and polished, the product is discharged from the outlet 13b of the casing 13 to the outside as a product.

Here, the raw material supply device for supplying crushed stone as the raw material 1 is disposed above the casing 13, and a rectangular cross section of the chute 2 consisting of an upper chute member 2a and the lower chute member 2b. The chute 2 is connected to both chute members 2a and 2b by inserting the lower end portion of the upper chute member 2a into the upper end portion of the lower chute member 2b and passing the support shaft 3 through the overlapping portion inside and outside. The upper end of the upper chute member 2a is connected to the discharge port of the crusher (not shown), and the lower end of the lower chute member 2b is inserted into the supply port 13a at the upper part of the casing 13 of the grinder 11.

  The said support shaft 3 is distribute | arranged so that it may extend in the direction orthogonal to the axial direction of the rotor 14 of the grinder 11 within a horizontal surface. Further, as shown in FIG. 4 (a), on both side surfaces of the lower chute member 2b, there are provided substantially L-shaped connecting pieces 4 having one end at a position where the support shaft 3 passes. A rod 5a of a cylinder 5 extending along the axial direction of the rotor 14 is rotatably connected to the other end of the connecting piece 4. And the edge part on the opposite side to the rod 5a of each cylinder 5 is rotatably attached to the bracket 6 fixed to the upper chute member 2a. As a result, the lower chute member 2 b can rotate around the support shaft 3 in a vertical plane parallel to the axial direction of the rotor 14.

  Therefore, by extending the rod 5a of each cylinder 5 from the state of FIG. 4A, the lower chute member 2b is rotated as shown in FIG. The raw material supply position of the grinder 11 can be changed. Here, the lower chute member 2b is gradually (intermittently) rotated from one end side to the other end side of the rotor 14 to change the raw material supply position according to the wear state of each hammer 25 of the rotor 14. Alternatively, the raw material supply position may be reciprocally rotated (swinged) so as to constantly change during the operation of the attritor 11.

Raw material supply apparatus 1 of this, as described above, since the raw material supply position of grinder 11 can be dispersed in the axial direction of the rotor 14, a premature wear of the hammer 25 of the rotor 14 in the vicinity of the raw material supply position Can be prevented. As a result, the grinder 11 is less likely to cause a reduction in processing capacity due to excessive retention of crushed stone as in the conventional case, and the maintenance cycle of the rotor 14 can be extended.

  In the embodiment described above, the raw material supply position of the grinder 11 is changed by rotating the lower chute member 2b of the chute 2, but the lower end of the chute moves along the axial direction of the rotor. For example, the entire chute may be translated in the rotor axial direction.

The present onset Ming, attritor incorporating a rotor having a plurality of projections on the outer circumferential surface as implementation form, particularly can be effectively applied, incorporating the rotor with no protrusions on the outer peripheral surface attritor Of course, it can be used effectively.

1 raw material supply device 2 chute 2a on chute member 2b under the chute member 3 supporting shaft 4 coupling piece 5 cylinder 6 bracket 11 attritor 12 pedestal 13 housing 13a supply port 13b outlet 14 rotor 25 hammer (projection)

Claims (3)

A raw material is supplied from a chute of a raw material supply device installed above the casing to a supply port provided at an upper portion of the casing, and a rotor penetrating the casing in a lateral direction is rotated, thereby adjusting the raw material in the casing. Tablets, Oite the grinding machine to perform polishing, grinding machine, characterized in that the lower end of the chute of the raw material supply device and movable along the axial direction of the rotor. The chute of the raw material supply device is divided into an upper chute member and a lower chute member, and the lower chute member is arranged in a vertical plane parallel to the axial direction of the rotor, at the connection position of the upper chute member and the lower chute member. grinding machine according to claim 1, characterized in that the rotatable around a supporting shaft provided in the vicinity. Grinding machine according to claim 1 or 2, wherein the pre-km over data is one having a plurality of projections on its outer peripheral surface.

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