CN212857615U - Sand mixer - Google Patents

Abstract

The application relates to a roller mill, roller mill includes agitator tank and stirring subassembly, the stirring subassembly includes: the rotating shaft is at least partially positioned in the inner cavity of the stirring box and can rotate; the driving blade is positioned in the inner cavity of the stirring box and is connected with the rotating shaft; the blocking part is positioned in the inner cavity of the stirring box and is connected with the rotating shaft. When stirring subassembly during operation, the drive vane drive material is followed first drive direction and is moved, the stop part is located the motion route of material, and at this moment, this stop part can play certain effect of blockking to the motion of material, delays material advancing speed in order to increase the material stop the time of agitator tank inner chamber improves stirring efficiency, and then improves the mixing efficiency and the homogeneity of material, reduces the energy consumption.

Description

Sand mixer

Technical Field

The application relates to the technical field of casting equipment, in particular to a sand mixer.

Background

The sand mixer is a machine which uniformly stirs sand for casting, a binder, an additive, water and the like, and the sand mixer can form molding sand with certain performance for casting after mixing, and in addition, pigment is added into the sand mixer, and sand carving modeling can also be formed through the sand mixer. At present, a commonly used sand mixer comprises a sand box, a main shaft is arranged in the sand box and is connected with a blade, and the blade is driven to rotate in the rotating process of the main shaft, so that substances such as sand and soil entering the sand box, a binder and the like are mixed and uniformly stirred through the rotation of the blade to form molding sand or sand sculpture. However, the sand mixer mainly depends on the rotation of the blades to stir the sandy soil, and has the defects of low mixing efficiency, large energy consumption and long time.

SUMMERY OF THE UTILITY MODEL

The application provides a roller mill, this roller mill can improve the mixing uniformity and the mixing efficiency of material.

The embodiment of the application provides a roller mill, roller mill includes:

a stirring box having an inner cavity;

a rotating shaft, at least part of which is positioned in the inner cavity and can rotate;

the driving blade is positioned in the inner cavity and is connected with the rotating shaft;

the blocking part is positioned in the inner cavity and is connected with the rotating shaft;

the driving blade is used for driving the material to move along a first driving direction, and the blocking part is located on a moving path of the material.

In one possible design, the blocking portion includes a flap, a plate surface of which is not parallel to the first driving direction.

In one possible design, the baffle is provided in plural, and each of the baffles is located between adjacent driving vanes in the axial direction of the rotating shaft.

In one possible design, the plate surface of the baffle is inclined in the opposite direction to the inclination of the driving blade face.

In one possible embodiment, the angle between the plate surface of the baffle and the surface of revolution of the axis of rotation is in the range from 17 ° to 25 °.

In one possible design, the blocking portion further includes a first connecting portion for connecting the baffle and the rotating shaft.

In one possible design, the blocking portion has a size smaller than that of the driving blade in a radial direction of the rotation shaft.

In one possible design, the driving blade is a continuous ribbon helical blade.

In one possible design, the minimum distance between the rotation diameter of the driving blade and the inner wall of the stirring box along the radial direction of the rotation shaft is 6mm-10 mm.

In one possible design, the sand mixer further comprises a traction frame, and the traction frame is connected with the stirring box and used for driving the stirring box to move.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

FIG. 1 is a schematic structural diagram of a sand mixer provided in the present application in one embodiment;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a schematic structural view of the stirring assembly of FIG. 1;

FIG. 4 is a schematic structural view of the remaining part of the sand mixer of FIG. 1 with the stirring assembly removed.

Reference numerals:

1-a traction frame;

2-a reducer;

3-a frame;

4-a stirring box;

41-lumen;

5-a stirring component;

51-a rotating shaft;

52-shaft tube;

53-driving the blade;

531-second connecting part;

54-a barrier;

541-a baffle;

542-a first connection;

6-a feeding assembly;

61-feeding hopper;

62-a third connecting portion;

63-a first drive;

7-a discharge assembly;

71-a discharge hole;

72-a second drive;

8-a weight sensor;

the accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.

Detailed Description

For better understanding of the technical solutions of the present application, the following detailed descriptions of the embodiments of the present application are provided with reference to the accompanying drawings.

It should be understood that the embodiments described are only a few embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the examples of this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

It should be noted that the terms "upper", "lower", "left", "right", and the like used in the embodiments of the present application are described in terms of the angles shown in the drawings, and should not be construed as limiting the embodiments of the present application. In addition, in this context, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on "or" under "the other element or be indirectly on" or "under" the other element via an intermediate element.

The application provides a roller mill, as shown in fig. 1, this roller mill includes agitator tank 4 and stirring subassembly 5, and this agitator tank 4 has inner chamber 41, and this inner chamber 41 is used for holding material and stirring subassembly 5, and wherein, this material can include sand, binder, additive, water etc. through this stirring subassembly 5, can be with above-mentioned material stirring and mixing. Meanwhile, the sand mixer also comprises a feeding assembly 6 and a discharging assembly 7, wherein the feeding assembly 6 is provided with an upper hopper 61 and a first driving device 63 which are connected through a third connecting part 62, the upper hopper 61 is powered by the first driving device 63 to realize the actions of containing and feeding, the materials are sent into the inner cavity 41 of the stirring box 4, and the position of the materials poured into the stirring box is the feeding position; this ejection of compact subassembly 7 has discharge gate 71 and second drive arrangement 72, and this discharge gate 71 sets up in agitator tank 4 bottom, and the material accomplishes the stirring back in the inner chamber 41 of agitator tank 4, is provided power and is controlled discharge gate 71 by second drive arrangement 72 and open, accomplishes the row material.

In the sand mixer commonly used at present, a stirring component mainly takes a blade as a main part, and materials such as sand and soil entering a sand box, a binder and the like are mixed and uniformly stirred through the rotation of the blade. But only rely on the blade to rotate and stir the material, deposit the defect that mixing efficiency is low, and the power consumption is big, and the time is long.

In order to solve the technical problem, the embodiment of the present application provides a sand mixer, as shown in fig. 2 and fig. 3, the stirring assembly 5 includes a rotating shaft 51, a driving blade 53 and a blocking portion 54, wherein the rotating shaft 51 is at least partially located in the inner cavity 41 of the stirring box 4 and is capable of rotating, the driving blade 53 and the blocking portion 54 are both located in the inner cavity 41 and are both connected to the rotating shaft 51, so that during the rotation of the rotating shaft 51, the driving blade 53 and the blocking portion 54 can be driven to rotate, the driving blade 53 can drive the material to move in the first driving direction, stirring of the material is achieved, and the material is conveyed from the feeding position to the discharging port 71 along the movement path, and the blocking portion 54 is located in the movement path of the material. Wherein, the motion route of material indicates that the starting point is feed position, and the terminal point is the route of discharge gate 71, and this route can be the straight line, also can be curve, helix, broken line etc. as long as the route for connecting feed position and discharge gate 71 all is in the protection scope of this application. Based on this, the first driving direction is a direction capable of driving the materials to be conveyed along the movement path.

In the embodiment of the application, when stirring subassembly 5 during operation, drive blade 53 drives the material and moves along first drive direction, and barrier 54 is located the motion route of material, and at this moment, this baffle 541 can play certain effect of blockking to the motion of material to can be used for blockking that the material gos forward and/or restrict material moving speed, stop the time in inner chamber 41 with the increase material, improve stirring efficiency, and then improve the mixing efficiency and the homogeneity of mixture of material, reduce the energy consumption.

Specifically, as shown in fig. 1 and fig. 2, the blocking portion 541 includes a baffle 541, and a plate surface of the baffle 541 is not parallel to the first driving direction, at this time, a projected area of the baffle 541 along the first driving direction is large, when the material is driven by the driving blade 53 and moves along the first driving direction, the striking baffle 541 receives a reaction force of the baffle 541, and under the reaction force, the material has a tendency of moving toward the feeding position, and therefore, under the action of the driving blade 53 and the baffle 541, the material is made to reciprocate between the driving blade 53 and the baffle 541, so as to further increase a time for the material to stay in the inner cavity 41, further improve stirring efficiency and stirring uniformity of the material, and reduce energy consumption.

In the first embodiment, as shown in fig. 1 and fig. 2, the blocking portion 54 further includes a first connecting portion 542, and the blocking plate 541 is fixedly connected to the rotating shaft 41 through the first connecting portion 542, or the blocking plate 541 is detachably connected to the rotating shaft 51 through the first connecting portion 542, or the blocking portion 54 is integrally formed with the rotating shaft 51, so as to improve the stability of the rotation of the blocking portion 54. The baffle 541 is fixed at a preset position of the inner cavity 41 through the first connecting portion 542, and meanwhile, the first connecting portion 542 can also play a certain role in blocking materials. The first connecting portion 542 may have a plate-like structure.

In this embodiment, the driving blade 53 and the blocking portion 54 are both fixed to the shaft tube 52, the driving blade 53 is fixed to the shaft tube 52 through the second connecting portion 532, the shaft tube 52 is sleeved into the rotating shaft 51, and the driving blade 53 and the blocking portion 54 are driven to rotate by the rotation of the rotating shaft 51, so as to achieve the stirring function.

Specifically, as shown in fig. 2, the stirring assembly 5 may be provided with a plurality of blocking portions 54, each blocking portion 54 is provided with at least one baffle 541, and each blocking portion 54 is axially distributed along the rotating shaft 51 and is respectively located between adjacent driving blades 53. Every time the material passes through a baffle 541 when moving along a first driving direction, the material can receive the driving force of the driving blade 53 and the reaction force of the baffle 541, the material can reciprocate between the driving blade 53 and the baffle 541 under the combined action of the two forces, and the material can pass through a plurality of reciprocating motions by the blocking parts 54, so that the stirring efficiency is further improved.

The shape of the baffle 541 can be a square, disc, slotted plate, perforated plate or other plate surface according to the needs of designers; the baffle 541 is preferably made of wear-resistant materials such as stainless steel, ceramics and ceramic matrix composite materials, alloy materials or a wear-resistant coating is used on the surface of the baffle to prolong the service life of the baffle; the surfaces of the plates 541 can be concave and/or convex, as well as planar.

Further, the plate surface of the baffle 541 is inclined in the direction opposite to the inclination direction of the working surface of the driving blade 53. The vane working surface of the driving vane 53 is a vane thrust surface (a surface on which the vane applies pressure to the material and pushes the material to move). As shown in fig. 2, when the rotation surface (or the section of the rotation axis) of the driving blade 53 is taken as a reference surface in a plan view of the stirring mechanism, the baffle 541 is shifted to the right with respect to the reference surface when the blade operating surface is shifted to the left with respect to the reference surface; the blade working surface is offset to the right relative to the datum plane and the baffle 541 is offset to the left relative to the datum plane. When the stirring assembly 5 works, the material is subjected to a first axial force exerted by the blade working surface, the force is perpendicular to the blade working surface and forms an acute angle with the first driving direction, and the material is pushed to move towards the first driving direction in the stirring box 4; on the other hand, the material between adjacent driving vanes 53 is subjected to a second axial force applied by the baffle 541, the direction of the second axial force is perpendicular to the plate surface of the baffle 541 and opposite to the first axial force, and the material is driven to move in the opposite direction along the first driving direction, so that the material is locally mixed between the adjacent vanes. Therefore, when the whole material moves along the first driving direction to form a large circulation in the whole machine, local mixing formed by reciprocating the material between the driving blades 53 and the baffle 541 exists locally, and the multiple local mixing together form circulation of the material from outside to inside and from inside to outside, so as to achieve the purpose of uniformly mixing and stirring.

In this embodiment, the driving blade 53 may be a continuous belt-shaped helical blade, and when the driving blade 53 rotates along with the rotating shaft 51, the continuous belt-shaped helical blade may keep the material uniform and stable during the transportation process, and simultaneously, it is ensured that the stirring box 4 is full of the material during the transportation process.

Specifically, the included angle between the baffle 541 and the revolution surface is related to the inclination angle of the working surface of the helical blade, and in order to reduce the working resistance of the baffle 541, the included angle between the baffle 541 and the revolution surface is selected to be 17-25 °; preferably, the included angle ranges from 19 ° to 21 °; still preferably, the included angle between the baffle 541 and the revolution surface is 21 ° or 22.5 °, at this time, the baffle has small working resistance, high circulation speed and good stirring effect.

Meanwhile, as shown in fig. 2 and 3, along the radial direction of the rotating shaft 51, the size of the blocking portion 54 is smaller than that of the driving blade 53, so that the material is prevented from being blocked by the blocking plate 541 completely, and the material cannot move in the first driving direction and further cannot form a circulation due to an excessive second axial force applied to the material by the blocking portion 54, thereby affecting the stirring operation.

Specifically, the rotation diameter of the stopper 54 is smaller than the rotation diameter of the driving vane 53 by 10mm to 20mm (the rotation diameter is the diameter of the maximum circle projected by the movement locus of the object when the object performs a circular movement around the axis).

In the above embodiment, as shown in FIG. 2, the minimum distance between the driving blade 53 and the inner wall of the agitation chamber 4 in the radial direction of the rotation shaft 51 is 6mm to 10 mm. At this time, the driving blade 53 can keep rotating stably in the inner cavity 41 of the stirring box 4, and the inner cavity space of the stirring box 4 can be fully utilized, so that the stirring volume is increased, and the mixing is more sufficient and uniform.

In the above embodiment, as shown in fig. 1 and fig. 2, the sand mixer may further include a traction frame 1, a speed reducer 2, and a frame 3, where the frame 3 is connected to the stirring box 4, and the traction frame 1 is connected to a driving mechanism (e.g., a tractor) and connected to the frame 3 for driving the stirring box 4 to move. This roller mill still is located 3 both sides of frame including the wheel subassembly that is used for realizing the machine and removes, wherein two wheels respectively to make this roller mill can rely on the traction of drive arrangement (like the tractor) to realize removing, drive arrangement (like the tractor) connects reduction gear 2 as the power supply simultaneously, drives stirring subassembly 5 rotatory, and then realizes mixing the stirring function.

In the above embodiment, as shown in fig. 4, the sand mixer is further provided with a weight sensor 8 for detecting the weight of the agitator tank 4.

Specifically, the weight sensors 8 can be configured in multiple numbers, and the weight sensors 8 are respectively arranged at different positions of the sand mixer, so that the weight of the sand mixer can be calculated more accurately.

Preferably, as shown in fig. 4, three weight sensors 8 are respectively arranged on two sides of the outer surface of the stirring box 4 and the traction frame 1 to form a precise weighing surface of a three-point supporting structure, so that the weight of the added material can be measured, and alternatively, the weighing surface is formed by a four-point supporting structure formed by 4 weight sensors.

In this embodiment, the sand mixer further includes a CPU and a display device, the CPU calculates data measured by the gravity sensor 8 to obtain the weight of the material added to the stirring tank 4, and displays the weight on the display device, and meanwhile, if the added material is abnormal to a preset weight, the CPU may give a buzzer alarm, and may further have a function of weighing after being reset.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (10)

1. A sand mixer, characterized in that it comprises:

a stirring box (4) having an inner cavity (41);

a rotating shaft (51), at least part of the rotating shaft (51) is positioned in the inner cavity (41) and can rotate;

the driving blade (53) is positioned in the inner cavity (41), and the driving blade (53) is connected with the rotating shaft (51);

a blocking part (54), wherein the blocking part (54) is positioned in the inner cavity (41) and is connected with the rotating shaft (51);

wherein the driving blade (53) is used for driving the material to move along a first driving direction, and the blocking part (54) is positioned on the moving path of the material.

2. A roller mill according to claim 1, characterized in that the blocking portion (54) comprises a flap (541), the face of the flap (541) being non-parallel to the first driving direction.

3. A roller mill according to claim 2, wherein said plurality of said blocking plates (541) are provided, and are respectively located between adjacent said driving blades (53) in the axial direction of said rotary shaft (51).

4. A roller mill according to claim 2, characterized in that the inclination of the face of the baffle (541) is opposite to the inclination of the working face of the driving blade (53).

5. A roller mill according to claim 2, characterized in that the angle between the plate surface of the baffle (541) and the surface of revolution of the rotary shaft (51) is in the range 17 ° to 25 °.

6. A roller mill according to claim 2, characterized in that the blocking portion (54) further comprises a first connecting portion (542), the first connecting portion (542) being for connecting the baffle (541) and the rotary shaft (51).

7. A roller mill according to any of claims 1 to 6, characterized in that the size of the blocking portion (54) is smaller than the size of the drive blade (53) in the radial direction of the rotational shaft (51).

8. A roller mill according to any of claims 1 to 6 wherein the drive blade (53) is a continuous ribbon helical blade.

9. A roller mill according to any of claims 1-6, characterized in that the diameter of revolution of the driving blade (53) is 6-10 mm from the inner wall of the stirring box (4) in the radial direction of the rotation shaft (51).

10. A roller mill according to any of claims 1-6, characterized in that the roller mill further comprises a traction frame (1), and the traction frame (1) is connected with the stirring box (4) and used for driving the stirring box (4) to move.

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