CN2244443Y

CN2244443Y - Mechanical dry sand reclaiming plant

Info

Publication number: CN2244443Y
Application number: CN 95227969
Authority: CN
Inventors: 肖波; 张俊德; 高建华; 徐正达; 王秀萍
Original assignee: Huazhong University of Science and Technology
Current assignee: Huazhong University of Science and Technology
Priority date: 1995-12-08
Filing date: 1995-12-08
Publication date: 1997-01-08
Anticipated expiration: 2005-12-08

Abstract

The utility model provides a mechanical dry used sand reclaiming plant, composed of a motor, a main shaft, a stirring rod, a sand barrel, a sand inlet, an inner sand outlet and a sand and dust separation chamber. The horizontal sand barrel is supported on the main shaft, and the horizontal sand barrel and the main shaft are driven to rotate with the same centre at different speeds by the motor. The mechanical dry used sand reclaiming plant uses the rotating sand barrel to cause the sand to keep close to the inner wall of the sand barrel, the sand and the sand barrel rotate together, and the rotating stirring rod at a high speed in the sand barrel is used to strike and rub the sand grain endlessly to remove the coating of the sand grain. The sand can consecutively enter into the mechanical dry sand reclaiming plant, the mechanical dry used sand reclaiming plant can export the sand and can remove dust consecutively, the production rate is high, the coating removing ability is strong, and the mechanical dry used sand reclaiming plant is suitable for various kinds of foundry used sand reclamation. The mechanical dry used sand reclaiming plant has the following conspicuous advantages: the mechanical dry used sand reclaiming plant can solve the reclamation of the water glass used sand, and the mechanical property of the reclaimed sand is better than that of the new sand.

Description

A kind of mechanical dry method reclaiming machine for waste sand

The utility model relates to a kind of drum-type Mechanical Method casting old-sand regeneration machine.

Water-glass sand is widely used in Foundry Production, but the problem of water-glass sand regeneration is solved for a long time well.Owing to sand reclaiming plant cost reason, use mechanical reclaim equiment to account for the overwhelming majority aborning.P.Pohl has invented a kind of boiling type Mechanical Method reclaiming machine for waste sand, this machinery regenerating device is by rotating in the layer of sand of metal stirring rod in vertical sand tube, friction, strike sand grains, the waterglass film that removes from sand grains and other dust, effect by ebullated bed, take away from the top of regenerating device, enter cleaner.This reclaiming machine for waste sand advances sand, discharging is step, and ebullated bed is the plane, is inconvenient to shake out, and productivity ratio is low.

The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art part, provides a kind of and can advance sand continuously, shakes out the mechanical dry method reclaiming machine for waste sand that productivity ratio is high.

For achieving the above object, the solution that the utility model adopts is: this machine is by motor, main shaft, stirring rod, the sand tube, sand inlet, inner sand outlet and dust separation chamber are formed, horizontal sand tube is bearing on the main shaft by bearing, by the concentric friction speed rotation of driven by motor and main shaft, stirring rod and main shaft link, the sand inlet amount of establishing is on an end end face of main shaft one end or sand tube, inner sand outlet is arranged on the other end of sand tube, the sand-dust separating chamber that is fixed on the support is positioned at and corresponding section, inner sand outlet position, be used for collecting the reclaimed sand that comes out from inner sand outlet, its lower end has outer sand export, and the upper end has the dust outlet.

Advantage of the present utility model is:

1. can advance sand continuously, shake out and dedusting, the productivity ratio height.

2. the striping ability is strong, and reclaimed sand rate of recovery height is fit to various casting old-sand regenerations.

3. particularly can solve the regeneration of used sodium silicate sand, reclaimed sand can be done system sand 100% ground and use, and its mechanical performance is better than fresh sand.Following table is that the every performance of reclaimed sand and fresh sand compares.

	Residual Na ₂O content (%)	Initial tensile strength (KPa)	24h tensile strength (KPa)	Retained strength (KPa)
	Residual Na ₂O content (%)	Initial tensile strength (KPa)	24h tensile strength (KPa)	Retained strength (KPa)	Reclaimed sand	0.14	40	500	100
Fresh sand	——	40	400	100	Reclaimed sand	0.14	40	500	100

Fig. 1 is the structure diagram of a kind of embodiment of the utility model.

Fig. 2 is the structure diagram of the another kind of embodiment of the utility model.

By shown in Figure 1, sand tube 6 is a horizontal type device, is bearing on the main shaft 8 by bearing, and it is shaped as cylindrical, and is if do coning, then better.Stirring rod 5 is fixedly connected with main shaft 8, and parallel or vertical with main shaft 8, and in order to strengthen the power that sand moves to inner sand outlet 4, stirring rod 5 is shape in the shape of a spiral.In order to simplify power transmission arrangment, settled two motors, motor 1 drives 6 rotations of sand tube, and motor 9 drives main shaft 8 rotation at a high speed, and main shaft 8 is concentric friction speed rotation with sand tube 6, realizes the relative motion of stirring rod and layer of sand.Be provided with annular sand inlet 7 between the end face of main shaft 8 and sand tube 6, have inner sand outlet 4 on the periphery of sand tube 6 other ends, inner sand outlet is a plurality of.The sand-dust separating chamber 3 that is fixed on the support is positioned at and corresponding section, inner sand outlet 4 position, and its interface is an annular, covers in inner sand outlet 4 fully, is used for collecting the reclaimed sand that comes out from inner sand outlet, and its lower end has outer sand export 10, and the upper end has dust outlet 2.

Sand is entered in the sand tube 6 by sand inlet 7, because the rotation of horizontal sand tube 6, the inwall and the sand tube 6 that make sand be attached to sand tube 6 under action of centrifugal force rotate together, and main shaft 8 drive metal stirring rod 5 are the continuous sand grains that hits, rubs of rotation at a high speed, makes it striping.Simultaneously, sand utilizes the effect of sand tube 6 interior sand potential differences and stirring rod 5 automatically to be moved to inner sand outlet 4 by sand inlet 7, the reclaimed sand that is come out by inner sand outlet 4 enters dust separation chamber 3, under draft effect, dust is got rid of by dust outlet 2, and entering cleaner, reclaimed sand is discharged by outer sand export 10 under the gravity effect, reaches to advance sand continuously, shake out and the purpose of dedusting.

The difference of Fig. 2 and Fig. 1 is in the present embodiment, to have changed the transmission mechanism of sand tube, i.e. transmission sand tube rotation on the periphery of sand tube.For example, be provided with driving gear 11 in the lower end of sand tube 6 circumference, drive the gear ring be fixed on the sand drum outer wall sand tube is rotated, the benefit of this kind of drive is, shortened the regenerating device fuselage, made things convenient for to advance sand, shake out.Sand inlet 7 is arranged on an end of main shaft 8, a plurality of inner sand outlets 4 are arranged on the end face of sand tube 6 other ends, be fixed on sand-dust separating chamber 3 on the support and be arranged on endface position corresponding section with sand tube 6 other ends, its interface is cylindrical, can cover in end face, the setting of stirring rod 5 is all parallel with main shaft 8, has strengthened the demoulding ability like this.

Claims

1. mechanical dry method reclaiming machine for waste sand is characterized in that: forms by motor, main shaft (8), stirring rod (5), sand tube (6), sand inlet (7), inner sand outlet (4) and sand-dust separating chamber (3),

Sand tube (6) is a horizontal type device, is bearing on the main shaft (8) by bearing, by the concentric friction speed rotation of driven by motor and main shaft (8);

Stirring rod (5) links with main shaft (8);

Sand inlet (7) is arranged on the end end face of end of main shaft (8) or sand tube (6);

Inner sand outlet (4) is arranged on the other end of sand tube (6);

Sand-dust separating chamber (3) is arranged on and inner sand outlet (4) corresponding section, position, is used for collecting the reclaimed sand that comes out from inner sand outlet (4), and its lower end has outer sand export (10), and the upper end has dust outlet (2).

2. regenerating device according to claim 1 is characterized in that: stirring rod (5) is shape in the shape of a spiral.

3. according to claim 1,2 described regenerating devices, it is characterized in that: sand tube (6) be shaped as taper shape.