Metal powder mixing device

Abstract

A metal powder mixing tank comprises a tank body, the tank body comprises a double shuttle tank group, the double shuttle tank group comprises a left shuttle tank and a right shuttle tank, the left shuttle tank and the right shuttle tank are of the same size and shape; and also comprises a bulk material portion, the bulk material portion is a spherical or ellipsoidal shell; the bottom ends of the left shuttle tank and the right shuttle tank in the double shuttle tank group are connected to form a discharge port, the bottom end of the discharge port is connected to a discharge constriction, and the bottom end of the discharge constriction is connected to the bulk material portion; the double shuttle tank group has two, which are symmetrically arranged relative to the center of the bulk material portion, the axes of the left shuttle tank and the right shuttle tank intersect, and the projection angle β of the axis angle on the plane where the longitudinal and width directions of the double shuttle tank group are located is between 25 and 40 degrees. The mixing tank can improve the mixing efficiency, reduce the impact of metal powder on the equipment, and reduce the equipment maintenance cost.

Description

Technical Field

[0001] The invention relates to a metal powder mixing device, in particular to a shuttle-shaped tank assembly used for rapid metal mixing. Background Art

[0002] The cavity in the cylinder of the metal powder mixing device of the prior art is shuttle-shaped, that is, the two ends are conical cavities and the middle is a cylindrical cavity, and the rotating shaft passes through the cylindrical cavity and is perpendicular to the axis of the cylinder. The rotating shaft drives the cylinder to rotate, and the mixed copper powder falls and slides from one end of the cylinder to the other end, thereby achieving mixing. However, when this metal powder mixing device rotates, more copper powder forms a mass and freely falls from one end of the cylinder to the other end, resulting in poor mixing effect, and the free-falling copper powder mass has a relatively large impact on the shell, causing relatively large vibration, which aggravates the wear of the rotating shaft or the bracket supporting the rotating shaft.

[0003] Based on this, the following technical solution has appeared in the prior art (CN201510189501.3 A metal powder mixing device), a metal powder mixing device. The metal powder mixing device includes a cylinder and a rotating shaft. The cavity in the cylinder includes two symmetrical shuttle-shaped cavities, which are coaxially connected and interconnected. The cavity is provided with a cavity door. The rotating shaft is located on the symmetry plane of the two shuttle-shaped cavities and passes through the shell and is fixedly connected to the shell. The cavity cross-section on the symmetry plane of the two shuttle-shaped cavities is the smallest. The copper powder will encounter a certain resistance when passing through this position, and the copper powder is blocked once. After being blocked, the copper powder will spray downward along the smallest cross-section. The spraying process will form a parabolic trajectory and aggregate when it falls to the other end of the cylinder, thereby improving the mixing effect. The copper powder is buffered by the smallest cross-section during the falling process, which reduces the impact, reduces the vibration, and reduces the wear of the rotating shaft and the rotating shaft bracket.

[0004] After experiments, this mixing device has the following problems: 1. The essence of metal powder mixing is to make the metal powder collide and rub against each other to achieve the purpose of mixing. Although this mixing device solves the problem of vibration caused by metal powder impacting the tank body, the double shuttle tank actually reduces the process of linear motion of the metal powder. If the tank body rotates at a low speed and the metal powder always moves along the tank body, the metal powder will not move linearly, which greatly reduces the speed of the metal powder in the tank body under the original rotation speed. Although the problem of metal powder impacting the tank body is solved, the mixing efficiency is also reduced. If the tank body rotation speed is increased so that the metal powder does not move in accordance with the tank body, the metal powder will still fall directly from one end to the other or collide with the tank body, causing vibration; 2. The amount of powder added to the double shuttle tank at a time becomes smaller. The double shuttle tank in the prior art actually sacrifices the mixing volume. In summary, the shape of the double shuttle tank and the existing common shuttle tank need to be improved to have better mixing efficiency, seismic performance and a larger single mixing volume.

[0005] In addition, the existing design ideas of mixing tanks all follow the principle of rotating the tank body to drive the metal powder to gain potential energy. When there is no obstacle or the obstacle is reduced, the metal powder falls, collides with each other and collides with the tank body to achieve mixing of the metal powder. However, direct collisions between metal powders are very rare. Basically, collisions between metal powders will occur after the tank body collides, thereby achieving mixing. This design idea can only achieve higher mixing efficiency by allowing the metal powder to collide more with the tank body at the same rotation rate of the tank body. This is the design idea of ​​the above-mentioned prior art. The above-mentioned problems are easily caused. Summary of the invention

[0006] The object of the present invention is to provide a metal powder mixing tank which can improve the mixing efficiency of direct collision mixing of metal powders.

[0007] In order to achieve the above object, the present invention comprises a tank body, the tank body comprises a double shuttle-shaped tank group, the double shuttle-shaped tank group comprises a left shuttle-shaped tank and a right shuttle-shaped tank, the left shuttle-shaped tank and the right shuttle-shaped tank are of the same size and shape;

[0008] It also includes a bulk material portion, which is a spherical or ellipsoidal shell;

[0009] The bottom ends of the left shuttle-shaped tank and the right shuttle-shaped tank in the double shuttle-shaped tank group are connected to form a feeding port, and the distance from the bottom end of the tank body wall at the connection between the left shuttle-shaped tank and the right shuttle-shaped tank to the feeding port is 1 / 9-1 / 6 of the axial length of the left shuttle-shaped tank;

[0010] The bottom end of the discharge port is connected to a discharge constriction, and the longitudinal section of the side wall of the discharge constriction is two symmetrical arcs, which protrude into the discharge constriction and tilt upward, and the height of the discharge constriction is 1 / 6-1 / 5 of the axial length of the left shuttle tank;

[0011] The bottom opening of the blanking neck is 5 / 6-1 / 2 of the top opening area;

[0012] The bottom end of the material discharge neck is connected with the bulk material part;

[0013] There are two double shuttle tank groups, which are symmetrically arranged relative to the center of the bulk material part. The axes of the left shuttle tank and the right shuttle tank intersect, and the projection angle β of the axis angle on the plane where the longitudinal and width directions of the double shuttle tank group are located is between 25-40 degrees.

[0014] Preferably, the left shuttle-shaped tank and the right shuttle-shaped tank are symmetrical structures relative to the symmetry plane.

[0015] Preferably, the left shuttle tank and the right shuttle tank are asymmetric structures, and the angle α between the axes of the left shuttle tank and the right shuttle tank on the planes of the longitudinal direction of the double shuttle tank group and the radial direction perpendicular to the width direction is between 10-20 degrees.

[0016] Furthermore, a plurality of bulk material shuttles are fixed in the middle of the bulk material section, and the axes of the bulk material shuttles are parallel to the axis of the bulk material section.

[0017] Further, a guide plate is fixed on the inner wall of the left shuttle-shaped tank, one side of the guide plate is in contact with the inner wall of the left shuttle-shaped tank and is parallel to the generatrix of the inner wall of the left shuttle-shaped tank, and the side away from the inner wall of the left shuttle-shaped tank extends from the tank mouth of the left shuttle-shaped tank to the plane where the top edge of the tapered portion located at the lower side is located, and the side is inclined from the inner wall of the left shuttle-shaped tank to the center of the plane where the top edge of the tapered portion located at the lower side is located, and the angle between the extended line and the axis of the left shuttle-shaped tank is between 15 and 25 degrees;

[0018] The right shuttle-shaped tank is provided with the same guide vane as the left shuttle-shaped tank.

[0019] The beneficial effect of the present invention lies in that a new design concept for a mixing tank is designed. By designing a shuttle-shaped tank with two intersecting axes, the metal powder can first collide with itself to achieve rapid mixing, thereby avoiding a large number of collisions with the tank body, improving the mixing efficiency, reducing the vibration of the mixing tank, and reducing the maintenance cost of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the present invention.

[0021] Figure 2 yes Figure 1 Left view of .

[0022] Figure 3 2 is a schematic structural diagram of the second embodiment.

[0023] Figure 4 It is a schematic diagram of the bulk shuttle assembly.

[0024] Figure 5 It is a schematic diagram of the internal structure of the shuttle tank.

[0025] In the figure, the double shuttle tank group 10, the feed opening 11, the feed constriction 12, the tank wall 13 at the connection, the left shuttle tank 20, the guide plate 21, the sealing cover 22, the right shuttle tank 30, the bulk material part 40, and the bulk material shuttle 41. DETAILED DESCRIPTION

[0026] The invention is described in detail below with reference to the accompanying drawings.

[0027] like Figure 1-5 As shown, a metal powder mixing tank includes a tank body, characterized in that the tank body includes a double shuttle-shaped tank group 10, the double shuttle-shaped tank group 10 includes a left shuttle-shaped tank 20 and a right shuttle-shaped tank 30, and the left shuttle-shaped tank 20 and the right shuttle-shaped tank 30 are the same in size and shape;

[0028] It also includes a bulk material portion 40, which is a spherical or ellipsoidal shell;

[0029] The bottom ends of the left shuttle-shaped tank 20 and the right shuttle-shaped tank 30 in the double shuttle-shaped tank group 10 are connected to form a feed opening 11, and the distance from the bottom end of the tank body wall 13 at the connection between the left shuttle-shaped tank 20 and the right shuttle-shaped tank 30 to the feed opening 11 is 1 / 9-1 / 6 of the axial length of the left shuttle-shaped tank 20;

[0030] The bottom end of the feed opening 11 is connected to a feed necking 12. The longitudinal section of the side wall of the feed necking 12 is two symmetrical arcs. The arcs protrude into the feed necking 12 and tilt upward. The height of the feed necking 12 is 1 / 6-1 / 5 of the axial length of the left shuttle tank 20.

[0031] The bottom opening of the blanking neck 12 is 5 / 6-1 / 2 of the top opening area;

[0032] The bottom end of the material discharge neck 12 is connected to the bulk material portion 40;

[0033] There are two double shuttle tank groups 10, which are symmetrically arranged relative to the center of the bulk material part 40. The axes of the left shuttle tank 20 and the right shuttle tank 30 intersect, and the projection angle β of the axis angle on the plane where the longitudinal and width directions of the double shuttle tank group 10 are located is between 25-40 degrees.

[0034] This mixing tank rotates along Figure 1 The center of the bulk material section rotates in the radial and longitudinal planes. When the metal powder flows out of the left and right shuttle-shaped tanks of the double shuttle-shaped tank group 10 on one side, it will collide and mix at the discharge port 11 and the discharge constriction 12, diffuse in the bulk material section after passing through the constriction, and collide and mix with each other again in the bulk material section as it rotates. This can increase the probability of collision and mixing between the metal powders themselves. Compared with using the tank wall to achieve collision and mixing of metal powders, this design idea has a higher mixing efficiency, can reduce the impact of metal powders on the tank body, reduce vibration, and has a low equipment failure rate and maintenance cost.

[0035] The left shuttle tank 20 and the right shuttle tank 30 can be symmetrical structures relative to the symmetry plane, or can be asymmetrically arranged. Figure 3 As shown, the angle α between the axis of the left shuttle tank 20 and the right shuttle tank 30 in the longitudinal direction of the double shuttle tank group 10 and the radial plane perpendicular to the width direction is between 10 and 20 degrees. In this way, when the metal powder flows out of the left and right shuttle tanks, they have a certain angle with each other, the impact surface is larger, and the impact effect is better.

[0036] In order to improve the mixing efficiency, a plurality of bulk material shuttles 41 are fixed in the middle of the bulk material section 40, and the axes of the bulk material shuttles 41 are parallel to the axis of the bulk material section 40. Of course, fixing a concentric ball in the bulk material section 40 is also possible.

[0037] In order to avoid the impact of metal powder and improve the bulk material efficiency, 4-8 guide plates 21 are fixed on the inner wall of the left shuttle tank 20. One side of the guide plate is in contact with the inner wall of the left shuttle tank 20 and is parallel to the generatrix of the inner wall of the left shuttle tank 20. The side away from the inner wall of the left shuttle tank 20 extends from the mouth of the left shuttle tank 20 to the plane where the top edge of the tapered part on the lower side is located. The side is inclined from the inner wall of the left shuttle tank 20 to the center of the plane where the top edge of the tapered part on the lower side is located. The extended line of the guide plate intersects with the axis of the left shuttle tank 20 at an angle of 15-25 degrees. In this way, the metal powder will be dispersed by the guide plate when entering the left shuttle tank 20, reducing agglomeration and impact on the tank body. The right shuttle tank 30 is provided with the same guide plate as the left shuttle tank 20.

[0038] In order to further improve the bulking efficiency and reduce the impact on the tank body, a hemisphere or cone protruding into the tank is fixed on the inner side of the sealing cover 22 of the left shuttle tank 20, such as Figure 5 shown.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A metal powder mixing tank, comprising a tank body, characterized in that: The tank body includes a double shuttle tank group, which includes a left shuttle tank and a right shuttle tank, and the left shuttle tank and the right shuttle tank are of the same size and shape; it also includes a bulk material portion, which is a spherical or ellipsoidal shell; the bottom ends of the left shuttle tank and the right shuttle tank in the double shuttle tank group are connected to form a discharge port, and the distance from the bottom end of the tank body wall at the connection between the left shuttle tank and the right shuttle tank to the discharge port is 1 / 9-1 / 6 of the axial length of the left shuttle tank; the bottom end of the discharge port is connected to a discharge shrinkage, and the longitudinal section of the side wall of the discharge shrinkage is two symmetrical arcs, and the arc is directed to the discharge port The necking is convex inside and inclined upward, and the height of the feeding necking is 1 / 6-1 / 5 of the axial length of the left shuttle tank; the bottom opening of the feeding necking is 5 / 6-1 / 2 of the top opening area; the bottom end of the feeding necking is connected with the bulk material part; there are two double shuttle tank groups, which are symmetrically arranged relative to the center of the bulk material part, and the axes of the left shuttle tank and the right shuttle tank intersect, and the projection angle β of the axis angle on the plane where the longitudinal and width directions of the double shuttle tank group are located is between 25-40 degrees; a plurality of bulk material shuttles are fixed in the middle of the bulk material part, and the axes of the bulk shuttles are parallel to the axes of the bulk material part; 4-8 guide vanes are fixed on the inner wall of the left shuttle-shaped tank, one side of the guide vane is in contact with the inner wall of the left shuttle-shaped tank and is parallel to the generatrix of the inner wall of the left shuttle-shaped tank, and the side away from the inner wall of the left shuttle-shaped tank extends from the tank mouth of the left shuttle-shaped tank to the plane where the top edge of the tapered portion on the lower side is located, and the side is inclined from the inner wall of the left shuttle-shaped tank to the center of the plane where the top edge of the tapered portion on the lower side is located, and the angle between its extended line and the axis of the left shuttle-shaped tank is between 15-25 degrees; the right shuttle-shaped tank is provided with the same guide vane as the left shuttle-shaped tank.

2. The metal powder mixing tank according to claim 1, characterized in that: The left shuttle tank and the right shuttle tank are symmetrical structures relative to the symmetry plane.

3. The metal powder mixing tank according to claim 1, characterized in that: The left shuttle tank and the right shuttle tank are asymmetric structures, and the angle α between the axis of the left shuttle tank and the right shuttle tank on the plane of the two dimensions of the longitudinal direction of the double shuttle tank group and the radial direction perpendicular to the width direction is between 10-20 degrees.

Images