A vertical concrete mixer

Abstract

The present invention discloses a vertical concrete mixer, which includes a cylinder body and a cylinder cover. An outlet is provided at the bottom of the cylinder body, and a chute is axially provided on the inner side wall of the cylinder body. An inlet is provided on one side of the cylinder cover, and a driving motor and a stirring assembly are installed at the central part of the cylinder cover; the stirring assembly includes a lead screw that is rotatably connected to the cylinder cover through bearing A and is driven by the driving motor to rotate forward and backward. The lead screw is sequentially helically sleeved with a sliding nut A, a rotating nut, and a sliding nut B. The sliding nut A is fixedly connected with a sliding rod A, the sliding nut B is fixedly connected with a sliding rod B, the other ends of the sliding rod A and the sliding rod B are both slidably connected to the chute, and stirring blades are fixedly connected to the outer side wall of the rotating nut. The present invention can cause significant axial, radial, and circumferential flow of the concrete, thereby enabling the concrete in the cylinder body to be fully stirred and the concrete in the entire cylinder to be evenly mixed.

Description

Technical Field

[0001] The present invention relates to concrete mixing equipment, and particularly to a vertical concrete mixer. Background Art

[0002] The working principle of the existing vertical concrete mixer is that the motor drives the rotating shaft to rotate, and the rotating shaft drives the mixing blades to rotate synchronously to mix the concrete. The mixing method of the existing mixer causes the concrete to mainly generate circumferential and radial flows under the action of the mixing blades, and there is little axial flow, so that the upper and lower layers of concrete cannot be fully mixed and the uniformity is poor. Moreover, the disassembly and assembly of the mixing components of the existing vertical concrete mixer are difficult, so that the cycle of replacing or overhauling the mixing components is long, and the working efficiency of the mixer is reduced. Summary of the Invention

[0003] To solve the above technical problems, the present invention provides a vertical concrete mixer.

[0004] The technical solution adopted by the present invention is as follows:

[0005] A vertical concrete mixer includes a cylinder body with an open top and a cylinder cover detachably connected to the cylinder body. An outlet is provided at the bottom of the cylinder body. A chute penetrating through the upper end is axially provided on the inner side wall of the cylinder body. A feed inlet is provided on one side of the cylinder cover. A driving motor and a mixing component are installed at the center of the cylinder cover; the mixing component includes a lead screw rotatably connected to the cylinder cover through bearing A and driven to rotate forward and backward by the driving motor. A sliding nut A, a rotating nut, and a sliding nut B are sequentially sleeved on the lead screw from top to bottom in a spiral manner. A sliding rod A is fixedly connected to the outer side wall of the sliding nut A, and the other end of the sliding rod A is slidably connected to the chute. A sliding rod B is fixedly connected to the outer side wall of the sliding nut B, and the other end of the sliding rod B is slidably connected to the chute. A mixing blade is fixedly connected to the outer side wall of the rotating nut, and the mixing blade is rotatably connected to the cylinder body; a bearing B is installed at the bottom end of the lead screw, and the bearing B is axially slidable but not rotatably connected to the inner bottom wall of the cylinder body.

[0006] Further, a plain bearing A is installed on the side of the sliding nut A in contact with the rotating nut.

[0007] Further, a plain bearing B is installed on the side of the sliding nut B in contact with the rotating nut.

[0008] Further, an upper limit switch is installed on the inner side wall of the cylinder cover, and a lower limit switch is installed at the upper end of the bearing B. The upper limit switch and the lower limit switch are interlocked with the driving motor. When the sliding nut A moves upward to trigger the upper limit switch, the driving motor changes from forward rotation to reverse rotation. When the sliding nut B moves downward to trigger the lower limit switch, the driving motor changes from reverse rotation to forward rotation.

[0009] Further, a helical compression spring A and a helical compression spring B are respectively sleeved on the upper end and the lower end of the lead screw. One end of the helical compression spring A is fixedly connected to the inner side wall of the cylinder cover, and the other end is free; one end of the helical compression spring B is fixedly connected to the inner ring of the bearing B, and the other end is free.

[0010] Further, when the helical compression spring A is compressed to the limit value, the upper limit switch is just triggered; when the helical compression spring B is compressed to the limit value, the lower limit switch is just triggered.

[0011] Further, a counterbore is provided at the center of the inner bottom wall of the cylinder body, and a slot is provided on the circumferential side wall of the counterbore. An insertion block matched with the slot is provided on the outer side wall of the outer ring of the bearing B.

[0012] Further, a convex block which is inserted and matched with the chute of the cylinder body is provided on the outer side wall of the cylinder cover. When the convex block of the cylinder cover is inserted into the chute, the insertion block of the bearing B is just inserted into the slot on the inner bottom wall of the cylinder body.

[0013] Further, at least two sliding rods A are provided and symmetrically arranged; at least two sliding rods B are provided and symmetrically arranged.

[0014] Further, the driving motor is fixedly installed on the top of the cylinder cover through its base, and the output shaft of the motor extends vertically downward and is coaxially fixedly connected with the lead screw.

[0015] Advantages of the present invention:

[0016] 1. In the present invention, by providing a mixing impeller and a lead screw composed of mixing blades and a rotating nut, the mixing impeller moves upward from bottom to top or downward from top to bottom along the lead screw under the push of the sliding nut, and the two movements alternate, while rotating around the lead screw, so that the concrete generates significant axial, radial and circumferential flows, thereby making the concrete in the cylinder body be fully mixed, and the concrete in the whole cylinder is uniformly mixed.

[0017] 2. In the present invention, the driving motor and the mixing assembly are both installed on the cylinder cover, and the bottom end of the lead screw is axially slidable but not rotationally connected to the inner bottom wall of the cylinder body; thus, when it is necessary to replace or overhaul the mixing assembly, the mixing assembly can be conveniently removed, improving the working efficiency of the mixer. Description of the drawings

[0018] Figure 1 is a schematic structural diagram of the vertical concrete mixer of the present invention.

[0019] Figure 2 is a schematic structural diagram of the cylinder body of the present invention.

[0020] Figure 3 is a schematic structural diagram of the cylinder cover and the mixing assembly of the present invention.

[0021] Figure 4 It is a schematic structural view of the stirring impeller of the present invention. Specific embodiments

[0022] The present invention will be further described below in conjunction with specific examples for the convenience of understanding the present invention, but the present invention is not limited thereby.

[0023] Refer to Figures 1 - 4 , a vertical concrete mixer, including a cylinder body 10 with an open top and a cylinder cover 20 detachably connected to the cylinder body 10. A discharge port 101 is provided at the bottom of the cylinder body 10. A chute 11 penetrating through the upper end is axially provided on the inner side wall of the cylinder body. A feed port 201 is provided on one side of the cylinder cover 20. A driving motor 21 and a stirring assembly 22 are installed at the central part of the cylinder cover 20.

[0024] The stirring assembly 22 includes a lead screw 222 whose upper end is rotatably connected to the cylinder cover 20 through a bearing A221 and is driven by the driving motor 21 to rotate forward and backward. A sliding nut A223, a rotating nut 224, and a sliding nut B225 are sequentially sleeved on the lead screw 222 from top to bottom in a spiral manner. A sliding rod A226 is fixedly connected to the outer side wall of the sliding nut A223, and the other end of the sliding rod A226 is slidably connected to the chute 11. A sliding rod B227 is fixedly connected to the outer side wall of the sliding nut B224, and the other end of the sliding rod B227 is slidably connected to the chute 11. A stirring blade 228 is fixedly connected to the outer side wall of the rotating nut 224, and the stirring blade 228 is rotatably connected to the cylinder body 10. A bearing B229 is installed at the bottom end of the lead screw 222, and the bearing B229 is axially slidable but not rotatably connected to the inner bottom wall of the cylinder body.

[0025] During specific implementation, a stepped through hole can be axially provided at the central part of the cylinder cover 20. The large hole is used to install the bearing A221, and the small hole is used to pass the lead screw 222. The upper and lower ends of the lead screw are both set as smooth rods to facilitate the fitting connection with the bearing A221 and the bearing B229. The driving motor 21 is installed above the cylinder cover 20 through a motor base, and the motor shaft vertically penetrates the motor base and is fixedly connected to the lead screw 222. Preferably, the driving motor 21 is a variable frequency motor to facilitate adjusting the rotation speed of the lead screw. The stirring blade 228 is a prior art, including a central part and a stirring part. A through hole is provided in the central part, and the rotating nut 224 is sleeved in the through hole.

[0026] During use, when the driving motor 21 drives the lead screw 222 to rotate forward, the stirring impeller composed of the rotating nut 224 and the stirring blades 228 rotates and rises from bottom to top under the push of the sliding nut B 224; when the driving motor 21 drives the lead screw 222 to rotate reversely, the stirring impeller composed of the rotating nut 224 and the stirring blades 228 rotates and descends from top to bottom under the push of the sliding nut A 223. These two motions alternate, causing significant axial, radial, and circumferential flow of the concrete, and thus fully stirring the concrete in the cylinder and making the concrete in the entire cylinder evenly mixed.

[0027] Preferably, a plain bearing A is installed on the side of the sliding nut A 223 that contacts the rotating nut 224. A plain bearing B is installed on the side of the sliding nut B 225 that contacts the rotating nut 224. During specific implementation, bearing holes are provided on the sides of the sliding nut A 223 and the sliding nut B 225, and the plain bearing A and the plain bearing B are respectively installed in the bearing holes of the sliding nut A 223 and the sliding nut B 225, with the rolling elements protruding from the bearing holes. This makes it possible to have less friction and more flexible rotation when the sliding nut A 223 and the sliding nut B 225 push the stirring impeller to rise or fall.

[0028] Preferably, a helical compression spring A 231 and a helical compression spring B 232 are respectively sleeved on the upper and lower ends of the lead screw 222. The upper end of the helical compression spring A 231 is fixedly connected to the inner side wall of the cylinder cover 20, and the lower end is free; the lower end of the helical compression spring B 232 is fixedly connected to the inner ring of the bearing B 229, and the upper end is free. The settings of the helical compression spring A 231 and the helical compression spring B 232 can reduce the impact vibration of the sliding nut A 223 and the sliding nut B 225 on the cylinder cover 20 and the cylinder body 10.

[0029] Preferably, an upper limit switch 241 is installed on the inner side wall of the cylinder cover 20, and a lower limit switch 242 is installed at the upper end of the bearing B 229. The upper limit switch 241 and the lower limit switch 242 are interlocked with the driving motor 21. When the sliding nut A 223 moves upward and triggers the upper limit switch 241, the driving motor 21 changes from forward rotation to reverse rotation; when the sliding nut B 225 moves downward and triggers the lower limit switch 242, the driving motor 21 changes from reverse rotation to forward rotation. This can control the alternate motion of the stirring impeller to rotate and rise and rotate and fall. It is also possible to control the alternate motion of the stirring impeller to rotate and rise and rotate and fall through time, for example, making the driving motor 21 rotate forward for 10 seconds and then reverse for 10 seconds. During the 10 - second forward rotation, the stirring impeller rotates and rises from the lower part of the cylinder to the upper part of the cylinder, and during the 10 - second reverse rotation, the stirring impeller rotates and descends from the upper part of the cylinder to the lower part of the cylinder.

[0030] Preferably, when the helical compression spring A231 is compressed to the limit value, the upper limit switch 241 is just triggered; when the helical compression spring B242 is compressed to the limit value, the lower limit switch 242 is just triggered. This can play a role in protecting the limit switch and preventing its mechanical damage.

[0031] Preferably, a sunken hole 103 is provided at the center of the inner bottom wall of the cylinder body 10, a slot is provided on the circumferential side wall of the sunken hole 103, and a plug block matching with the slot is provided on the outer side wall of the outer ring of the bearing B229. A convex block that is inserted and matched with the chute 11 of the cylinder body is provided on the outer side wall of the cylinder cover 20. When the convex block of the cylinder cover 20 is inserted into the chute 11, the plug block of the bearing B229 is just inserted into the slot on the inner bottom wall of the cylinder body. During installation, the lead screw 222 passes through the central hole of the cylinder cover, and the sliding nut A223, the rotating nut 224 and the sliding nut B225 are sequentially sleeved in a spiral manner, and then the two ends are respectively connected to the bearing A221 and the bearing B229; when the cylinder cover and the cylinder body are connected by bolts, the convex block of the cylinder cover 20 is inserted into the chute 11, and the plug block of the bearing B229 is just inserted into the slot on the inner bottom wall of the cylinder body, so as to realize the axially slidable but non-rotating connection between the bearing B229 and the inner bottom wall of the cylinder body, which is convenient for the disassembly and assembly of the stirring assembly.

[0032] Preferably, there are two sliding rods A226 and two sliding rods B227, which are symmetrically arranged. Thus, the stirring impeller can rise and fall stably.

[0033] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements are also within the protection scope of the present invention.

Claims

1. A vertical concrete mixer, comprising a cylinder body with an open top and a cylinder cover detachably connected to the cylinder body, characterized in that, The bottom of the cylinder body is provided with a discharge port, and a chute penetrating through the upper end is axially arranged on the inner side wall of the cylinder body. An inlet port is arranged on one side of the cylinder cover, and a driving motor and a stirring assembly are installed at the center of the cylinder cover; the stirring assembly includes a lead screw rotatably connected to the cylinder cover through bearing A and driven by the driving motor to rotate forward and backward. A sliding nut A, a rotating nut and a sliding nut B are sequentially sleeved on the lead screw from top to bottom in a spiral manner. A sliding rod A is fixedly connected to the outer side wall of the sliding nut A, and the other end of the sliding rod A is slidably connected to the chute. A sliding rod B is fixedly connected to the outer side wall of the sliding nut B, and the other end of the sliding rod B is slidably connected to the chute. A stirring blade is fixedly connected to the outer side wall of the rotating nut, and the stirring blade is rotatably connected to the cylinder body; a bearing B is installed at the bottom end of the lead screw, and the bearing B is axially slidable but not rotatably connected to the inner bottom wall of the cylinder body.

2. The vertical concrete mixer according to claim 1, characterized in that, A flat bearing A is installed on the side of the sliding nut A in contact with the rotating nut.

3. The vertical concrete mixer according to claim 1, characterized in that, A flat bearing B is installed on the side of the sliding nut B in contact with the rotating nut.

4. The vertical concrete mixer according to claim 1, characterized in that, An upper limit switch is installed on the inner side wall of the cylinder cover, and a lower limit switch is installed at the upper end of the bearing B. The upper limit switch and the lower limit switch are interlocked with the driving motor. When the sliding nut A moves upward to trigger the upper limit switch, the driving motor changes from forward rotation to reverse rotation. When the sliding nut B moves downward to trigger the lower limit switch, the driving motor changes from reverse rotation to forward rotation.

5. A vertical concrete mixer according to claim 1 or 4, characterized in that, A spiral compression spring A and a spiral compression spring B are respectively sleeved on the upper end and the lower end of the lead screw. One end of the spiral compression spring A is fixedly connected to the inner side wall of the cylinder cover, and the other end is free; one end of the spiral compression spring B is fixedly connected to the inner ring of the bearing B, and the other end is free.

6. A vertical concrete mixer according to claim 5, characterized in that, When the spiral compression spring A is compressed to the limit value, the upper limit switch is just triggered; when the spiral compression spring B is compressed to the limit value, the lower limit switch is just triggered.

7. A vertical concrete mixer according to claim 1, characterized in that, A sunken hole is provided at the center of the inner bottom wall of the cylinder body, and a slot is provided on the circumferential side wall of the sunken hole. An insertion block matched with the slot is provided on the outer side wall of the outer ring of the bearing B.

8. The vertical concrete mixer according to claim 7, wherein, A convex block is provided on the outer side wall of the cylinder cover and is inserted and matched with the chute of the cylinder body. When the convex block of the cylinder cover is inserted into the chute, the insertion block of the bearing B is just inserted into the slot of the inner bottom wall of the cylinder body.

9. The vertical concrete mixer according to claim 1, characterized in that, There are at least two sliding rods A, which are symmetrically arranged; there are at least two sliding rods B, which are symmetrically arranged.

10. A vertical concrete mixer according to claim 1, characterized in that, The driving motor is fixedly installed on the top of the cylinder cover through its base, and the motor output shaft extends vertically downward and is coaxially fixedly connected to the lead screw.

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