Used sand crushing and recycling device

Abstract

The invention discloses a used sand crushing and recycling device, and relates to the technical field of crushing devices.The used sand crushing and recycling device comprises a crushing box, a belt conveyor is arranged in the crushing box in a penetrating mode, and a cage-shaped crushing device and an impact assembly are sequentially arranged in the crushing box in the conveying direction of the belt conveyor; the cage-shaped crushing device and the counterattack assembly are both located over the belt conveyor, and the cage-shaped crushing device and the counterattack assembly are matched to be used for crushing materials; the cage-shaped crushing device comprises a rotating shaft, a positioning frame is fixedly connected to the rotating shaft, a plurality of crushing plates are fixedly connected to the outer side of the positioning frame in the circumferential direction of the positioning frame, and wear-resistant layers are arranged on the edges of the crushing plates. The used sand crushing and recycling device can continuously crush used sand, and is good in crushing effect and high in crushing efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of crushing devices, in particular to a used sand crushing and recycling device. Background Art

[0002] In the clay sand casting process. In order to prepare the molding sand for modeling, we usually add an appropriate amount of water, bentonite and coal powder, and extrude it into shape by applying a pressure of 50 to 80kPa. After that, it goes through a series of processes such as pouring, cooling and sand dropping. In this process, old sand containing a large number of irregular sand blocks will be produced. If these old sands are not crushed and directly sent to the old sand screening system, many sand blocks containing effective ingredients will be screened out and discarded. However, these old sands contain a large number of reusable components. If they are discarded, it will cause great waste.

[0003] Therefore, it is necessary to propose a device for crushing and recycling old sand to solve the above problems. Summary of the invention

[0004] The object of the present invention is to provide a device for crushing and recycling old sand to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a used sand crushing and recycling device, comprising a crushing box, a belt conveyor is arranged through the crushing box, a cage-shaped crushing device and an impact assembly are arranged in sequence inside the crushing box along the conveying direction of the belt conveyor, the cage-shaped crushing device and the impact assembly are both located directly above the belt conveyor, and the cage-shaped crushing device and the impact assembly cooperate to crush materials; The cage-shaped crushing device comprises a rotating shaft, a positioning frame is fixedly connected to the rotating shaft, a plurality of crushing plates are fixedly connected to the outer side of the positioning frame along its circumference, and the edges of the crushing plates are provided with a wear-resistant layer.

[0006] Preferably, the cage-shaped crushing device and the belt conveyor rotate in opposite directions, and the rotation speed of the cage-shaped crushing device is greater than the conveying speed of the belt conveyor.

[0007] Preferably, the impact assembly includes a cross bar and a chain, the cross bar is fixedly connected to the crushing box, a plurality of chains are arranged on the cross bar, and the plurality of chains are combined to form an impact surface.

[0008] Preferably, the distance between the belt surface of the belt conveyor and the cage-shaped crushing device and the impact assembly is smaller than the size of the material to be crushed.

[0009] Preferably, the wear-resistant layer is a hard alloy surfacing layer.

[0010] Preferably, a feed port and a discharge port are respectively provided at the front and rear ends of the crushing box, and the belt conveyor passes through the crushing box through the feed port and the discharge port, and inspection doors are hinged at the feed port and the discharge port.

[0011] Preferably, the top of the inspection door of the discharge port is arranged obliquely toward the counterattack component.

[0012] Preferably, side baffles are provided on both sides of the conveyor belt of the belt conveyor.

[0013] The present invention provides a device for crushing and recycling old sand, which has the following beneficial effects: 1. The old sand crushing and recycling device transports the materials by setting up a belt conveyor, and performs multi-stage crushing of the materials with the cooperation of the cage crushing device and the impact assembly to ensure the crushing effect of the materials.

[0014] 2. The old sand crushing and recycling device improves the crushing efficiency by arranging multiple crushing plates on the outer side of the rotating shaft, and at the same time, a wear-resistant layer is arranged on the outer side of the crushing plate to reduce wear and increase the service life of the crushing plate.

[0015] 3. The old sand crushing and recycling device adopts a counterattack surface composed of a plurality of chains, which can not only crush the block materials but also allow the crushed materials to pass through, thereby avoiding the accumulation of crushed materials between the cage-shaped crushing device and the counterattack component.

[0016] 4. The old sand crushing and recycling device adopts a counterattack surface formed by a combination of multiple chains, which enables it to perform the dual functions of crushing and screening at the same time. It has high integration and occupies small space. Compared with traditional counterattack plates, its preparation and maintenance costs are lower. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional schematic diagram of the structure of the present invention; Figure 2 It is a cross-sectional schematic diagram of the structure of the present invention; Figure 3 It is a front view schematic diagram of the structure of the present invention; Figure 4 It is a three-dimensional schematic diagram of the cage-shaped crushing device of the present invention.

[0018] In the figure: 1. Motor; 2. Crushing box; 3. Side baffle; 4. Belt conveyor; 5. Cross bar; 6. Chain; 7. Cage crushing device; 8. Hinge; 9. Inspection door; 10. Bolt hole; 11. Wear-resistant layer; 12. Crushing plate; 13. Positioning frame; 14. Rotating shaft; 15. Counterattack assembly. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] See also Figure 1-4 As shown, a device for crushing and recycling used sand includes a crushing box 2, a belt conveyor 4 is arranged through the crushing box 2, a cage-shaped crushing device 7 and an impact assembly 15 are arranged in sequence inside the crushing box 2 along the conveying direction of the belt conveyor 4, the cage-shaped crushing device 7 and the impact assembly 15 are both located directly above the belt conveyor 4, and the cage-shaped crushing device 7 and the impact assembly 15 are used to crush materials in cooperation; the cage-shaped crushing device 7 includes a rotating shaft 14, a positioning frame 13 is fixedly connected to the rotating shaft 14, a plurality of crushing plates 12 are fixedly connected to the outer side of the positioning frame 13 along its circumference, and a wear-resistant layer 11 is provided on the edge of the crushing plate 12. Specifically, the cage-shaped crushing device 7 and the belt conveyor 4 rotate in opposite directions. The rotation speed of the cage-shaped crushing device 7 is greater than the conveying speed of the belt conveyor 4.

[0021] When the old sand is crushed, it is transported by the belt conveyor 4, the motor 1 drives the rotating shaft 14 to rotate, the rotating shaft 14 drives the crushing plate 12 to rotate through the positioning frame 13, the crushing plate 12 acts on the material to be crushed on the belt conveyor 4 to crush it, and at the same time, the crushed material is thrown toward the impact assembly 15 at a high speed along the tangential direction of the rotation of the crushing plate 12 under the action of impact, so that the material is further crushed, and the crushed material falls onto the belt conveyor 4 and is sent out by it.

[0022] Specifically, when the cage-shaped crushing device 7 acts on the material to be crushed, the crushing plate 12 continuously cuts into the material accumulation layer on the belt conveyor 4, and the crushing plate 12 initially crushes the material to be crushed through its material-facing surface. At the same time, the crushed material moves synchronously with the crushing plate 12, and is finally thrown toward the impact assembly 15 at high speed under the action of centrifugal force.

[0023] In some embodiments, the counter-attack assembly 15 includes a cross bar 5 and a chain 6, the cross bar 5 is fixedly connected to the crushing box 2, and a plurality of chains 6 are provided on the cross bar 5, and the plurality of chains 6 are combined to form a counter-attack surface. When the material is thrown by the crushing plate 12 onto the counter-attack surface formed by the combination of the plurality of chains 6, the crushed material passes through the pores of the chain 6, and the block material collides with the chain 6 and is crushed. By adopting the counter-attack surface formed by the combination of the plurality of chains 6, a single part simultaneously assumes the dual functions of crushing and screening, so that it has a higher degree of integration, reduces the occupied space, and has a lower preparation and maintenance cost than the traditional counter-attack plate. At the same time, the chain 6 is slightly shaken by the impact of the material, which can avoid the retention of materials in the gap of the chain 6. In addition, the crushed material directly passes through the chain 6, which can effectively eliminate the risk of material retention between the cage-shaped crushing device 7 and the counter-attack assembly 15, ensuring its continuous and stable operation. Preferably, the chain 6 has multiple layers, and by setting multiple layers of chains 6, the collision probability is increased to ensure the crushing effect.

[0024] Specifically, the distance between the belt surface of the belt conveyor 4 and the cage-shaped crushing device 7 and the impact assembly 15 is smaller than the size of the material to be crushed to ensure the crushing effect.

[0025] In some embodiments, the wear-resistant layer 11 is a hard alloy cladding layer. By arranging the hard alloy cladding layer on the outer side of the crushing plate 12, wear is reduced and the service life of the crushing plate 12 is increased.

[0026] In order to facilitate maintenance of the cage-shaped crushing device 7 and the impact assembly 15, a feed port and a discharge port are respectively provided at the front and rear ends of the crushing box 2, and the belt conveyor 4 passes through the crushing box 2 through the feed port and the discharge port, and an inspection door 9 is hinged at the feed port and the discharge port through a hinge 8. Preferably, the top of the inspection door 9 is hinged to the crushing box 2, and bolt holes 10 are provided at the bottom of the inspection door 9 at positions corresponding to the crushing box 2, and the bottom of the inspection door 9 is fixedly connected to the crushing box 2 by bolts to prevent the inspection door 9 from moving.

[0027] Specifically, the top of the inspection door 9 of the discharge port is tilted toward the impact assembly 15. By tilting the impact assembly 15 at the discharge port, when the broken materials pass through the chain 6, the broken materials are blocked and fall back onto the belt conveyor 4 under the action of the tilted impact assembly 15.

[0028] In order to prevent the materials from sliding down from the two sides of the belt conveyor 4 , side baffles 3 are provided on both sides of the conveyor belt of the belt conveyor 4 .

[0029] Working principle: The material is sent to the crushing box 2 by the belt conveyor 4, and the motor 1 drives the cage-shaped crushing device 7 to rotate. Under the action of the crushing plate 12, the material is initially crushed and thrown to the chain 6. The material hits the chain 6 to be crushed for the second time. The crushed material falls onto the belt conveyor 4 and is then sent out by the belt conveyor 4.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for crushing and recycling old sand, characterized by: The invention comprises a crushing box (2), wherein a belt conveyor (4) is arranged through the crushing box (2), and a cage-shaped crushing device (7) and an impact assembly (15) are arranged in sequence inside the crushing box (2) along the conveying direction of the belt conveyor (4), wherein the cage-shaped crushing device (7) and the impact assembly (15) are both located directly above the belt conveyor (4), and the cage-shaped crushing device (7) and the impact assembly (15) cooperate to crush materials; The cage-shaped crushing device (7) comprises a rotating shaft (14), a positioning frame (13) is fixedly connected to the rotating shaft (14), a plurality of crushing plates (12) are fixedly connected to the outer side of the positioning frame (13) along its circumferential direction, and the edges of the crushing plates (12) are provided with a wear-resistant layer (11); The impact assembly (15) comprises a cross bar (5) and a chain (6); the cross bar (5) is fixedly connected to the crushing box (2); a plurality of chains (6) are arranged on the cross bar (5); and the plurality of chains (6) are combined to form an impact surface.

2. The device for crushing and recycling used sand according to claim 1, characterized in that: The cage-shaped crushing device (7) and the belt conveyor (4) rotate in opposite directions, and the rotation speed of the cage-shaped crushing device (7) is greater than the conveying speed of the belt conveyor (4).

3. The old sand crushing and recycling device according to claim 1 is characterized by: The distance between the belt surface of the belt conveyor (4) and the cage-shaped crushing device (7) and the impact assembly (15) is smaller than the size of the material to be crushed.

4. The device for crushing and recycling used sand according to claim 1, characterized in that: The wear-resistant layer (11) is a hard alloy cladding layer.

5. The device for crushing and recycling used sand according to claim 1, characterized in that: The crushing box (2) is provided with a feed inlet and a discharge outlet at the front and rear ends, respectively. The belt conveyor (4) passes through the crushing box (2) through the feed inlet and the discharge outlet. Inspection doors (9) are hinged at the feed inlet and the discharge outlet.

6. The old sand crushing and recycling device according to claim 5 is characterized by: The top end of the inspection door (9) of the discharge port is arranged obliquely toward the impact assembly (15).

7. The device for crushing and recycling used sand according to claim 1, characterized in that: The belt conveyor (4) has side baffles (3) on both sides of the conveyor belt.

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