WO2007052409A1

WO2007052409A1 - Crushed sand manufacturing device

Info

Publication number: WO2007052409A1
Application number: PCT/JP2006/317618
Authority: WO
Inventors: Kunio Sasaki
Original assignee: Kunio Sasaki
Priority date: 2005-10-31
Filing date: 2006-09-06
Publication date: 2007-05-10
Also published as: JP4540128B2; JPWO2007052409A1; KR20070072612A

Abstract

[PROBLEMS] To provide a crushed sand manufacturing device capable of efficiently performing an grinding action, uniformly grinding a raw sand to be crushed, and reducing the filling of a grinding material for the purpose of increasing the quality of the raw sand to be crushed. [MEANS FOR SOLVING THE PROBLEMS] This crushed sand manufacturing device comprises a spherical drum which of the whole is rotatable. The inside of the drum is partitioned in the rotating direction to form a mixing chamber which partly forms the spherical shape of the drum. The grinding material is put into the mixing chamber, and a rotating shaft in the mixing chamber is partitioned by a cylindrical screen to hold the grinding material in the mixing chamber. The mesh of the screen is set to such a size that allows crushed sand to freely pass therethrough and stops the passing of the grinding material therethrough, and a mixing and moving screw for moving and mixing the sand to be crushed by rotating is installed at the rotating center of the drum.

Description

Specification

Crushed sand production equipment

Technical field

TECHNICAL FIELD [0001] The present invention relates to a crushed sand production apparatus for use in concrete and building materials for producing high-quality crushed sand by the action of a grinding material using a rotating stirring drum.

Background art

[0002] Recently, the demand for crushed sand produced by crushed stone has increased as the dryness of natural river sand, mountain sand, etc., which has been used as fine aggregate for concrete 'asphalt' building materials, etc. Yes.

Since the raw crushed sand produced by this crushed stone is crushed and the grain shape is angular, it is necessary to make it spherical like natural sand. As shown in Patent Document 1 etc., the crushed sand is combined with a medium stone that is a grinding material. A method of grinding in a rotating stirring drum has been developed.

For example, as disclosed in Japanese Patent No. 2964133, as a conventional concrete crushed sand production apparatus 100, a stirring drum 102 having a stirring chamber 101 provided therein and a stirring drum 102 are provided as shown in FIG. A variable speed driving device that rotates and a medium stone 103 that is accommodated in the agitating chamber 101 are supplied, and the raw crushed sand 104 and water are supplied from one end into an agitating drum 102 that is rotationally driven around the central axis. Then, the raw crushed sand is crushed and polished by a grinding action with the medium stone 103 accommodated in the stirring drum 102, and is passed through a mesh-like discharge port 105 provided on the outer peripheral portion on the other end side of the stirring drum 102. The crushed sand 106 with a particle size is discharged.

[0003] Patent Document 1: JP 2001-252579 A

Disclosure of the invention

Problems to be solved by the invention

[0004] In the concrete sand crushed sand producing apparatus 100 of Patent Document 1 described above, the partition plate in the stirring chamber 101 is low, and the stirring chamber 101 is a cylindrical drum and the bottom is flat. It was difficult to say that it was not transported to the position, and was not necessarily efficiently stirred, and therefore the grinding action was also efficient. In addition, the transfer speed of the crushed sand and the ground material in the stirring chamber 101 is not uniform, and the transfer speed is not constant!

The present invention has been made in view of the above-mentioned problems, and is intended for concrete where the efficiency of the grinding action is good and uniform, and the replenishment of the grinding material can be reduced in order to improve the quality of the raw ground sand. The object is to provide an apparatus for producing crushed sand.

Means for solving the problem

In order to solve the above-mentioned problems, the invention of claim 1 is a stirring chamber having a spherical drum that rotates as a whole, the inside of the drum being partitioned in the rotation direction and forming a part of a spherical shape. A grinding material is inserted into the chamber. The rotating shaft of the stirring chamber is partitioned by a cylindrical screen, and the grinding material is held in the stirring chamber. The sand crushed sand producing apparatus is characterized in that it is set to a size that is free to enter and prevents the grinding material from entering and exiting, and is provided with a stirring moving screw that rotates, moves and agitates the crushed sand at the center of rotation of the drum.

The invention of claim 2 is characterized in that the stirring and moving screw is provided with a spiral blade which is inclined as a whole on a central axis, and the crushed sand is moved and diffused by the rotation of the blade. It is a crushed sand production device.

In the invention of claim 3, the rotating shaft of the stirring and moving screw is provided with a hollow portion, water is supplied to the hollow portion, and a plurality of nozzles are provided at appropriate positions of the rotating shaft to provide crushed sand and ground material. The apparatus for producing crushed sand according to claim 1 or claim 2, wherein water is sprayed on each of the two.

According to a fourth aspect of the present invention, there is provided a ground material inlet / outlet portion for taking in and out the ground material on the outer periphery of each drum of the stirring chamber. Device.

The invention of claim 5 is characterized in that the ground material inserted into the stirring chamber is a ceramic ball obtained by baking and hardening a material mainly composed of a ceramic component. Device.

The invention according to claim 6 is the crushed sand manufacturing apparatus according to claim 1, wherein the spherical drum rotating as a whole is connected to a plurality of drums. The invention's effect

[0006] According to the present invention, in the crushed sand manufacturing apparatus that grinds the raw crushed sand produced by crushed stone into product crushed sand, the ground material and the crushed sand are moved to a high position by a partitioned stirring chamber. By repeating separation and mixing, the impact and polishing 'grinding action is performed efficiently to improve production efficiency, and evenly mixed and ground by the stirring and moving screw at the center of rotation. In addition, the crushed sand can be moved to the outlet side, and the use of a ceramic ball as the grinding material has the effect of reducing replenishment of the grinding material. Brief Description of Drawings

[0007] FIG. 1 is a cross-sectional view of the entire main part of a crushed sand production apparatus according to an embodiment of the present invention;

[Fig. 2] Cross-sectional view of the stirring drum shown in Fig. 1,

[Fig. 3] Side view of the stirring drum shown in Fig. 1,

[FIG. 4] FIG. 4 (a) is a side view of the stirring and moving screw shown in FIG. 1, FIG. 4 (b) is a longitudinal sectional view thereof, and [FIG. 5] is an enlarged explanatory view of FIG.

[Fig. 6] Enlarged perspective view of Fig. 4 (a),

FIG. 7 is an explanatory view of a conventional concrete sand pulverizer.

Explanation of symbols

[0008] Α · 'Original crushed sand, Β ·' Product crushed sand, C- · Grinding material (C1 · · · ceramic ball),

D… crushed sand powder precipitate

1 · · · Benoleto conveyor,

2 ... Raw sand supply hotsuba, 21 ... Sprinkling nozzle,

3, 3a, 3b, 3c ... stirring drum, 32,32a, 32b, 32d, 32c ... stirring chamber, 31 ... through opening,

311 ... Inlet opening, 312 ... Outlet opening, 33 ... Cylindrical screen, 34 ... Abrasive material entry / exit, 341 ... Lid, 342 ... Opening, 35 ... Drum frame, 351 ... Support drive disk,

36

4 ... Stirring moving screw, 41 ... Rotating shaft, 42 ... Top bent part,

43 ... Linear blades, 44 ... Skew blades, 45 ... Hollow part, 451 ... Water supply pipe, 46 ... Nozzle,

47 pulley

5 ... Support base 51,51a, 51b, 51c, 51d ... Guide roller 52 ··· Drive motor, 53… Chain,

6 ... Sand breaking device, 61 ... Frame body, 62 ... Vibration device, 63 ... Receiving part, 64 ... Spray nozzle, 65 ... Flat plate screen, 66 ... Product sand hopper,

7 ... Collector, 71 ... Collector, 72 ... Catchment port, 73 ··· Settling tank, 74 ... Pump,

BEST MODE FOR CARRYING OUT THE INVENTION

[0009] Hereinafter, preferred embodiments of the crushed sand production apparatus of the present invention will be described with reference to the drawings.

Fig. 1 is a cross-sectional view of the main part of a concrete sand pulverizer for concrete which is an embodiment in which the present invention is applied to concrete. Crude sand A is supplied to the crushed sand supply hopper 2 by the belt compressor 1, and the crushed sand supply hopper 2 to 3 Is fed into the continuous stirring drum 3 (3a, 3b, 3c), and the raw crushed sand A is ground in the stirring drum and discharged by the stirring moving screw 4 which also serves as a stirring action. Separated into B and water and fine powder of crushed sand. This process will be described in more detail. Water is sprinkled on the raw crushed sand A of the crushed sand supply hopper 2 by a water spray nozzle 21 and penetrates through the center of rotation of the three stirring drums 3 (3a, 3b, 3c). 31 is provided with a rotating stirring moving screw 4, and an inlet opening 311 is provided at the center of rotation of the stirring drum 3 a at the tip. Water and raw crushed sand A are supplied into the inlet opening 311, and three series of them are provided. Each stirring drum 3 of the stirring drum 3 (3a, 3b, 3c) is divided into four stirring chambers 32 (32a, 32b, 32c, 32d). Will be ground.

The outer diameter of the stirring drum 3 has a spherical shape that rotates as a whole, and as shown in FIG. 2, the stirring chamber 32 (32a, 32b, 32c, 32d) of the stirring drum 3 Is formed in a spherical shape with a ball-shaped bottom and is divided by a cylindrical screen 33 with respect to the rotation center of the agitating drum 3, and the agitating chamber 32 is a grinding material described later. In contrast, it forms a closed chamber.

The ball shape with a part of the bottom formed in a spherical shape is that when the stirring chamber 32 is positioned below, the crushed sand and grinding material are naturally collected in the center of the stirring chamber 32 and polished efficiently. This is so that the crushing action is performed.

Thus, the mesh of the cylindrical cylindrical screen 33 is set to a size that allows the crushed sand to freely enter and exit and prevents the grinding material C from entering and leaving, so that the grinding material C is held in the stirring chamber 32. It is. Therefore, as shown in FIG. Is provided with a grinding material inlet / outlet 34 for taking in and out grinding material C, and if necessary, removes the cover 341 of the grinding material inlet / outlet 34 and inserts the grinding material through the opening 342.

In this example, the grinding material C was a ceramic ball C1 having a substantially uniform particle size mainly composed of ceramic components, so that the amount of wear of the grinding material itself was the same as that of the conventional grinding material. Compared to certain medium stones, the amount of hard ceramic C1 is drastically reduced, the replacement period of the grinding material is greatly extended, and the replenishment and replacement of the grinding material is extremely small. This is because the hardness can be harder than crushed sand and medium stone, so the grinding action is improved, the operating time of crushed sand in the stirring drum 3 can be shortened, and the production efficiency is also improved.

Furthermore, conventional media stones have different shapes, so the amount of grinding of the raw crushed sand is different and the production control is troublesome. The grinding amount can be predicted by making the particle size of the ceramic ball C1 uniform. Therefore, it is easy to produce a constant amount of crushed product sand and production management is also easy.

This ceramic ball C1 is made of a ceramic material such as alumina or silica in a spherical shape, baked at about 1000 ° C, and has a high hardness of about 6 to 40 mm in diameter (15 mm in this embodiment). Since the shape is a nearly uniform sphere, and the hardness and diameter can be designed to the desired size, ceramic balls can be made as a grinding material suitable for the equipment. Note that even if conventional media stones are used as the grinding material in this device, the production efficiency is improved as compared with the conventional crushed sand production device.

A support drive disk 351 is provided in front of and behind each drum frame 35 of the three stirring drums 3 (3a, 3b, 3c), and this support drive disk 351 is provided on the support base 5. The driven portion 36 of the largest diameter portion of the central stirring drum 3b is connected to the drive motor 52 and the shaft provided on the support base 5 and is rotatably supported by guide rollers 5l (51a, 51b, 51c, 51d). The stirring drum 3 is rotated by the flow 53.

The through-opening 31 which is the rotation center of the triple stirring drum 3 (3a, 3b, 3c) and the rotation center of the cylindrical tube screen 33 is provided with a stirring moving screw 4. The moving screw 4 has four linear blades 43 having four top bent portions 42 parallel to the rotating shaft 41 fixed to the outer periphery of the rotating shaft 41 which is the center thereof. The slanting blades 44 that slant about 45 degrees are provided, and the slanting blades provided on each linear blade 43 The root 44 has a spiral shape as a whole, and has a function of moving the crushed sand A and water from the inlet opening 311 to the outlet opening 312.

In addition, as shown in FIG. 5, the stirring and moving screw 4 receives the crushed sand A falling from above, and receives the crushed sand A by the straight blades 43 and then spreads (diffuses) downward to distribute the crushed sand A. As well as the action of kneading and grinding the raw crushed sand A.

Further, as shown in FIGS. 5 and 6, the rotating shaft 41 of the stirring and moving screw 4 is hollow, and water is supplied to the hollow portion 45, and a plurality of nozzles are provided at appropriate positions on the rotating shaft 41. 46 is provided and water is sprayed from the nozzle 46 to the crushed sand A.

One end of the rotating shaft 41 is provided with a driven pulley 47 outside the opening 312 at the outlet of the agitating drum 3 (3a, 3b, 3c), a drive motor (not shown) provided on the support base 5, and And driven by a belt (not shown). The hollow portion 45 is liquid-tightly connected to a water supply pipe 451 that supplies water, and a predetermined amount of water is supplied at a predetermined water pressure.

The plurality of nozzles 46 connected to the hollow portion 45 provide a straight line in addition to supplying water to the crushed sand A (as a result, also to the crushed material C) and promoting the grinding of the particles between the crushed sands. It also has the effect of removing the crushed sand stored at the joint of the blades 44 at the bent part of the blades 43 and smoothly moves the crushed sand A, contributing to the grinding action of the crushed sand A.

The raw crushed sand A ground by the stirring drum 3 is crushed at the corners and rectangular corners and polished to become high-quality product crushed sand B. By the transfer of the stirring moving screw 4, the crushed sand from the outlet opening 312 The separator 6 is charged.

[0013] The frame 61 of the crushed sand separator 6 is provided with a vibration device 62, and fine powder is washed away on the top of the crushed sand receiving portion 63 at the tip of the crushed sand separator 6 in order to improve the fluidity of the product crushed sand B. For this purpose, a spray nozzle 64 for spraying water is provided, and product crushed sand B cannot pass through at the bottom, and a flat screen screen 65 of mesh is provided to be inclined downward from the receiving portion 63. By this inclination and vibration, product crushed sand B The product crushed sand B is discharged from the product crushed sand hopper 66 at the end of the flat screen 65 to a predetermined facility.

Under the flat screen 65, there is a water collecting device 7 that collects water and powder, but there is a water collecting plate 71 that is almost the same area as the flat screen 65, and the water collecting plate 72 is connected to the central water collecting port 72. Inclined towards. Therefore, the water and crushed sand that fell through the mesh of the flat screen 65 Powder and a very small amount of ground powder are collected in the water collection port 72 and sent to the settling tank 73.

In this settling tank 73, crushed sand powder and ground powder (crushed sand powder precipitate) D settle and are removed when a predetermined amount is settled, but the separated supernatant water is pumped up again by pump 74 and reused. Water again from the watering nozzle.

[0014] Since the present embodiment is configured as described above, when the stirring drum 3 rotates and the stirring chamber 32 is positioned on the upper side, the crushed sand A and B and the ground material C (ceramic balls) are cylinders. Since they are separated by the screen 33 and are mixed when they are located on the lower side, they collide with each other and collide with each other, and the sand breaking action is performed more efficiently than the conventional apparatus.

In addition, the stirring moving screw 4 located in the central portion receives the crushed sand falling by the mesh force of the cylindrical screen 33 by the straight blade 43 and the top bending portion 42 with the top bent. By rotating, spreading downward (diffusion), crushed sand

Since the distribution of A is made uniform and subjected to the crushed sand action again, the collided friction is applied to the crushed sand uniformly.

The rotating shaft 41 of the stirring and moving screw 4 is hollow, and water is supplied to the hollow portion 45, and a plurality of nozzles 46 are provided at appropriate positions on the rotating shaft 41. Since water is sprayed onto the sand A, the sand sand A and B and the ground material C can be smoothly crushed so that water can be collected when the blade is sharpened with a grindstone. It is preventing. Further, since the nozzle 46 is provided on the rotating shaft 41, it has an action of constantly cleaning the top bent portion 42 of the rotating shaft 41 and the straight blade 43 and the oblique blade 44. No crushed sand or fine powder adheres to it. Furthermore, since some of the blades are skew blades 44, a screw conveyor is formed, and the crushed sand is transferred to the outlet.

[0015] It should be noted that the present invention is not limited to the above embodiments as long as the features of the present invention are not impaired. For example, the crushed sand production apparatus of the above embodiment may be used as a fine aggregate such as force concrete, asphalt, building material, etc. applied to the production of crushed sand for concrete, and may be used for an apparatus for producing crushed sand. . Further, in the above embodiment, the number of the stirring chambers 32 is four. As long as an effective grinding action can be obtained, the number of chambers is not limited to four, but may be three, or four or more, five or six. In addition, the spherical drum that rotates as a whole is a force that connects three drums. This drum can be set to an appropriate number depending on the desired degree of processing of the raw crushed sand. However, two or more (three or more) drums may be connected as necessary.

Claims

The scope of the claims

[1] A stirring chamber having a spherical drum that rotates as a whole, the inside of the drum being partitioned in the rotation direction to form a part of a spherical shape, and a grinding material is inserted into the stirring chamber. The rotating shaft is divided by a cylindrical screen to hold the ground material in the stirring chamber, and the mesh of the screen is set to a size that allows crushed sand to freely enter and exit and prevents the ground material from entering and exiting. An apparatus for producing crushed sand, characterized in that an agitating / moving screw that rotates and moves the crushed sand to stir is provided at the center of rotation of the drum.

[2] The crushed sand production according to claim 1, wherein the stirring and moving screw is provided with a spiral blade which is inclined as a whole on a central axis, and the crushed sand is moved and diffused by the rotation of the blade. apparatus.

[3] The rotating shaft of the agitating and moving screw is provided with a hollow portion, and water is supplied to the hollow portion, and a plurality of nozzles are provided at appropriate positions of the rotating shaft to supply water to the crushed sand and the ground material. 3. The crushed sand production apparatus according to claim 1, wherein the crushed sand is produced by spraying.

[4] The apparatus for producing crushed sand according to any one of claims 1 to 3, wherein an outer periphery of each of the stirring chambers is provided with a grinding material loading / unloading portion for taking in and out the grinding material.

[5] The apparatus for producing crushed sand according to any one of claims 1 to 4, wherein the grinding material inserted into the stirring chamber is a ceramic ball obtained by baking and solidifying a material mainly composed of a ceramic component.

6. The apparatus for producing crushed sand according to claim 1, wherein the spherical drum that rotates as a whole has a plurality of drums connected to each other.