CN210304577U

CN210304577U - Bran powder screening machine

Info

Publication number: CN210304577U
Application number: CN201921033612.5U
Authority: CN
Inventors: 曾宪奎
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-07-11
Filing date: 2019-07-03
Publication date: 2020-04-14
Anticipated expiration: 2029-07-03

Abstract

The utility model relates to a bran powder screening machine, which comprises a frame; the screening drum comprises an outer drum and a conical inner drum arranged in the outer drum, a powder absorbing cavity is arranged between the outer drum and the inner drum, and the drum wall of the inner drum is provided with screening holes; the negative pressure material suction pipe is communicated with the lower end of the outer cylinder; the feeding pipe is communicated with the upper end of the inner cylinder; the inner cylinder cleaning device comprises a main shaft, a support and a cleaning brush, wherein the main shaft extends into the inner cylinder from the upper end of the inner cylinder downwards; and the discharging device comprises a discharging pipe and a helical blade positioned in the discharging pipe, the upper end of the discharging pipe is communicated with the lower end of the inner cylinder, the lower end of the discharging pipe penetrates through the negative pressure material suction pipe in a sealing manner, the lower end of the main shaft penetrates through the discharging pipe and is supported by a base, and the helical blade is arranged on the main shaft. The utility model discloses a bran powder sieve mysterious machine can sieve out the bran powder from the mixture of bran powder chaff shell, and the bran powder purity of sieving out is higher, and the quality of fodder can be higher when being used as the additive of fodder.

Description

Bran powder screening machine

Technical Field

The utility model relates to a belong to cereal processing equipment field, concretely relates to bran powder sieve separator.

Background

The rice is made up by using rice husking machine to grind, friction brown rice to separate husk layer from endosperm, then making the treatments of brushing rice, removing bran, removing broken material and drying rice so as to obtain the invented rice with required grade.

The residual bran hull after bran removal can be used as an additive in the feed of livestock due to the rich crude fiber, a small amount of amino acid and vitamin, so as to increase the crude fiber in the feed, improve the peristalsis capability of the stomach of the livestock and improve the digestive capability of the stomach of the livestock. Generally, the bran shells are not directly used as an additive in the feed, but the bran shells are firstly crushed by a crusher to obtain bran powder as the additive in the feed, so that the feed quality is better. The existing problem is that the bran shells cannot be completely converted into the bran powder after passing through the pulverizer, so that the bran shells are mixed in the bran powder after being pulverized once, and the feed quality is reduced.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention provides a bran powder screening machine, which can screen bran powder from a mixture of bran powder and bran shell, thereby obtaining bran powder with higher purity.

In order to achieve the above purpose, the present invention is implemented by the following technical solutions: a bran powder screening machine, comprising: a frame; the screening drum comprises an outer drum fixed on the rack and a conical inner drum arranged in the outer drum, a powder suction cavity is formed between the outer drum and the inner drum, and the drum wall of the inner drum is provided with screening holes for allowing bran powder to pass through; the negative pressure material suction pipe is communicated with the lower end of the outer cylinder; the feeding pipe is communicated with the upper end of the inner cylinder; the inner cylinder cleaning device comprises a main shaft, a support and a cleaning brush, wherein the main shaft extends into the inner cylinder from the upper end of the inner cylinder downwards, the support is sleeved on the main shaft, the cleaning brush is arranged on the support and used for cleaning the inner wall of the inner cylinder, and the main shaft is driven by a motor; and the discharge device comprises a discharge pipe and a helical blade positioned in the discharge pipe, the upper end of the discharge pipe is communicated with the lower end of the inner cylinder, the lower end of the discharge pipe penetrates through the negative pressure suction pipe in a sealing manner, the lower end of the main shaft penetrates through the discharge pipe and is supported by a base positioned below the discharge pipe, and the helical blade is arranged on the main shaft.

Further, the lower end of the feeding pipe is communicated with the upper end of the inner cylinder, the discharging pipe is in a conical shape with a large upper part and a small lower part, and the rotating radius of the spiral blade is gradually reduced from top to bottom.

Furthermore, the upper end of the feeding pipe is communicated with the upper end of the inner cylinder, the discharging device further comprises a wind shield and a return spring which are sequentially sleeved outside the main shaft from top to bottom, and the wind shield is in sliding connection with the main shaft and keeps sealed with the main shaft in the sliding process; under the natural state, under the action of the return spring, the wind shield covers the discharge port at the lower end of the discharge pipe.

Furthermore, a shell is fixed at the upper end of the inner barrel, the feeding pipe is communicated with the inner barrel through the shell, the motor is fixed at the top end of the shell, an output shaft of the motor is coaxially connected with the top end of the main shaft, and a material guide blade in the shell is sleeved at the top end of the main shaft.

The utility model has the advantages that: the utility model provides a bran powder sieve separator can sieve out bran powder from the mixture of bran powder chaff shell, and the bran powder purity of sieving out is higher, and the quality of fodder can be higher when being used as the additive of fodder.

Drawings

Fig. 1 is a schematic structural diagram of a first embodiment of the present invention;

fig. 2 is a schematic structural diagram of a second embodiment of the present invention;

reference numerals:

10-a rack, 11-a base, 20-an outer cylinder, 23-a powder suction cavity, 30-an inner cylinder, 40-a feeding pipe, 50-a negative pressure material suction pipe, 60-an inner cylinder cleaning device, 61-a main shaft, 62-a support, 63-a cleaning brush, 64-a motor, 70-a discharging device, 71-a discharging pipe, 72-a helical blade, 73-a wind shield, 74-a return spring, 80-a shell and 90-a guide blade.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.

In this application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection, or an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

As shown in fig. 1-2, the utility model provides a bran powder screening machine, which comprises a frame 10, a screen drum, a negative pressure suction pipe 50, a feeding pipe 40, an inner drum cleaning device 60 and a discharging device 70.

The screen cylinder comprises an outer cylinder 20 fixed on the frame 10 and a conical inner cylinder 30 arranged in the outer cylinder 20, preferably, the outer cylinder 20 is also conical corresponding to the inner cylinder 30, a gap is arranged between the inner wall of the outer cylinder 20 and the outer wall of the inner cylinder 30, so that a powder suction cavity 23 is formed between the inner wall of the outer cylinder 20 and the outer wall of the inner cylinder 30, and the cylinder wall of the inner cylinder 30 is provided with screen holes through which bran powder can pass but bran shells cannot pass. The top ends of the outer cylinder 20 and the inner cylinder 30 are respectively connected with the frame 10, so that the top ends of the outer cylinder 20 and the inner cylinder 30 are indirectly connected together through the frame 10 and are kept sealed. Of course, in order to secure the sealing effect between the top ends of the outer cylinder 20 and the inner cylinder 30, a gasket may be provided between the top ends of the outer cylinder 20 and the inner cylinder 30.

One end of the negative pressure material suction pipe 50 is communicated with the lower end of the outer cylinder 20, and the other end is directly connected with a cyclone separator (not shown in the figure), so that negative pressure is generated in the negative pressure material suction pipe 50 when the cyclone separator works, and the negative pressure material suction pipe is used for sucking away the bran powder.

The feeding pipe 40 is communicated with the upper end of the inner cylinder 30, and the arrangement mode of the feeding pipe 40 is two, namely, the lower end of the feeding pipe is communicated with the upper end of the inner cylinder 30, and the mixture of the bran powder and the bran shells falls into the inner cylinder 30 through the feeding pipe 40 under the action of self gravity; the other is that the upper end is communicated with the upper end of the inner cylinder 30, and the mixture of the bran powder and the bran shells falls into the inner cylinder 30 through the feeding pipe 40 under the action of negative pressure suction.

The inner cylinder cleaning device 60 comprises a main shaft 61 extending downwards into the inner cylinder 30 from the upper end of the inner cylinder 30, a bracket 62 sleeved on the main shaft 61, and a cleaning brush 63 mounted on the bracket 62 and used for cleaning the inner wall of the inner cylinder 30, wherein the main shaft 61 is generally coaxially arranged with the inner cylinder 30, the main shaft 61 is driven by a motor 64, and the motor 64 can be arranged at the upper end or the lower end of the main shaft 61. The cleaning brush 63 is approximately parallel to a generatrix of the inner cylinder 30, a distance of 1-5 mm is kept between the cleaning brush 63 and the inner wall of the inner cylinder 30, and the cleaning brush 63 is not directly contacted with the inner wall of the inner cylinder 30, so that the service life of the cleaning brush 63 is prolonged.

The discharge device 70 comprises a discharge pipe 71 and a helical blade 72 positioned in the discharge pipe 71, wherein the upper end of the discharge pipe 71 is communicated with the lower end of the inner cylinder 30, the lower end of the discharge pipe 71 penetrates through the negative pressure material suction pipe 50 in a sealing manner, preferably, the discharge pipe 71 penetrates through the negative pressure material suction pipe 50 and then is fixed with the negative pressure material suction pipe 50 in a welding manner, and thus, the discharge pipe 71 supports the lower end of the inner cylinder 30. The lower end of the main shaft 61 penetrates through the discharge pipe 71 and is supported by a base 11 positioned below the discharge pipe 71, the discharge pipe 71 is coaxial with the inner cylinder 30, and the helical blade 72 is arranged on the main shaft 61. The helical radius of the helical blade 72 corresponds to the inner diameter of the discharge pipe 71. The base 11 can be fixed on the frame 10 or on the negative pressure material suction pipe 50. The spindle 61 is supported on the base 11 and is rotatable about its own axis by a motor 64.

The present invention is further illustrated below with respect to two arrangements of the feed tube 40:

the first embodiment is as follows:

as shown in fig. 1, when the lower end of the feeding pipe 40 is communicated with the upper end of the inner cylinder 30, the cyclone separator communicated with the negative pressure suction pipe 50 does not work, a part of the bran powder and bran shell mixture is fed into the inner cylinder 30, then the bran powder and bran shell mixture fills at least the upper space of the discharge pipe 71, so that the external space outside the discharge pipe 71 is isolated from the internal space of the inner cylinder 30 by the bran powder and bran shell mixture, then the cyclone separator is started to continuously feed the bran powder and bran shell mixture into the inner cylinder 30, under the suction force of the negative pressure suction pipe 50, the bran powder in the bran powder and bran shell mixture falling downwards in the inner cylinder 30 is sucked into the powder suction chamber 23 through the sieve holes on the inner cylinder 30 and enters the cyclone separator through the negative pressure suction pipe 50, and the bran powder is collected together after being separated by the cyclone separator. The bran shells can not pass through the sieve pores and are heavier than the bran powder, one part of the bran shells can directly fall to the bottom of the inner cylinder 30 under the action of self gravity, and the other part of the bran shells can be attached to the inner wall of the inner cylinder 30. Since the motor 64 drives the main shaft 61 to rotate, on one hand, the cleaning brush 63 brushes off the bran shells adhered to the inner wall of the inner cylinder 30, on the other hand, the spiral blades 72 discharge the bran shells from the discharge pipe 71, and the bran shells discharged from the discharge pipe 71 can be sent back to the pulverizer to be pulverized again.

In this embodiment, if the inner diameter of the discharge pipe 71 is too large, the bran powder and bran shell mixture fed into the inner cylinder 30 at the start of startup is not easy to fill at least the upper space of the discharge pipe 71, so that the bran powder and bran shell mixture cannot effectively isolate the outer space outside the discharge pipe 71 from the inner space of the inner cylinder 30, and further, after the cyclone separator operates, the outside air enters the inner cylinder 30 through the discharge pipe 71, so that the material cannot be smoothly discharged from the discharge pipe 71. Therefore, the inner diameter of the discharge pipe 71 has a certain influence on the reliability of the bran powder screening machine in this embodiment. To solve this problem, it is possible to increase the friction coefficient of the surfaces of the helical blades 72, the discharge pipe 71 and the lower end of the main shaft 61, thereby making it easier for the bran powder and bran shell mixture to remain in the upper space of the discharge pipe 71. To better solve the problem, in a modification of the present embodiment, the discharge pipe 71 is tapered with a large top and a small bottom, and the radius of rotation of the helical blade 72 is gradually reduced from top to bottom, so that the mixture of the bran powder and the bran shell easily fills up the upper space of the discharge pipe 71, thereby greatly improving the reliability of the bran powder screening machine.

Example two:

as shown in FIG. 2, when the upper end of the feeding pipe 40 is communicated with the upper end of the inner cylinder 30, and the bran-powder-bran-shell mixture is to enter the inner cylinder 30, a negative pressure fan (not shown) is installed at the lower end of the feeding pipe 40 by means of negative pressure suction. Therefore, in this embodiment, the discharging device 70 further includes a wind deflector 73 and a return spring 74 sequentially sleeved outside the main shaft 61 from top to bottom, and the wind deflector 73 is slidably connected to the main shaft 61 and keeps sealed with the main shaft 61 during the sliding process; the wind shield 73 is positioned below the feeding pipe 40, and the upper end and the lower end of the return spring 74 are respectively abutted against the wind shield 73 and the base 11. Naturally, the wind shield 73 covers the discharge opening at the lower end of the discharge pipe 71 and forms a seal with the lower end of the discharge pipe 71 by the return spring 74.

Cyclone starts the back, and the chaff shell can be piled up in the bottom of inner tube 30, and along with discharge device 70 begins work, the chaff shell can be carried to the bottom bin outlet of arranging material pipe 71 by helical blade 72, because the effect of blockking of deep bead 73, the chaff shell can be constantly compacted, the inner space of arranging material pipe 71 has all been filled up the chaff shell, and along with helical blade 72's continuation transport chaff shell, deep bead 73 begins to overcome return spring 74's resistance downstream to the bottom bin outlet of arranging material pipe 71 is opened, and the chaff shell is discharged.

In this embodiment, since the upper end of the feeding pipe 40 is communicated with the upper end of the inner cylinder 30, the device in the previous process of the bran powder screening machine is not required to be installed above the bran powder screening machine, and only needs to be installed on the same horizontal plane at the same height as the bran powder screening machine, so that the occupation of the longitudinal installation space is reduced.

In a modified version of this embodiment, a housing 80 is fixed to the upper end of the inner cylinder 30, the feeding pipe 40 is communicated with the inner cylinder 30 through the housing 80, the motor 64 is fixed to the top end of the housing 80, an output shaft of the motor 64 is coaxially connected to the top end of the main shaft 61, and a material guiding blade 90 located in the housing 80 is sleeved on the top end of the main shaft 61. When the motor 64 drives the main shaft 61 to rotate, the guide blades 90 also rotate, the bran powder and bran shell mixture is impacted by the guide blades 90 before entering the inner barrel 30, and the impacted bran powder and bran shell mixture moves towards the inner wall of the inner barrel 30 in the process of downwards entering the inner barrel 30, so that the probability of passing through the sieve holes in the bran powder is increased, and the screening efficiency of the bran powder is improved.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above, it will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, but that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A bran powder sieve separator which characterized in that: the method comprises the following steps:

a frame;

the screening drum comprises an outer drum fixed on the rack and a conical inner drum arranged in the outer drum, a powder suction cavity is formed between the outer drum and the inner drum, and the drum wall of the inner drum is provided with screening holes for allowing bran powder to pass through;

the negative pressure material suction pipe is communicated with the lower end of the outer cylinder;

the feeding pipe is communicated with the upper end of the inner cylinder;

the inner cylinder cleaning device comprises a main shaft, a support and a cleaning brush, wherein the main shaft extends into the inner cylinder from the upper end of the inner cylinder downwards, the support is sleeved on the main shaft, the cleaning brush is arranged on the support and used for cleaning the inner wall of the inner cylinder, and the main shaft is driven by a motor; and

the discharge device comprises a discharge pipe and a spiral blade positioned in the discharge pipe, the upper end of the discharge pipe is communicated with the lower end of the inner cylinder, the lower end of the discharge pipe penetrates through the negative pressure suction pipe in a sealing mode, the lower end of the main shaft penetrates through the discharge pipe and is supported by a base positioned below the discharge pipe, and the spiral blade is arranged on the main shaft.

2. The bran powder screening machine as claimed in claim 1, wherein: the lower end of the feeding pipe is communicated with the upper end of the inner cylinder, the discharging pipe is in a conical shape with a large upper part and a small lower part, and the rotating radius of the spiral blade is gradually reduced from top to bottom.

3. The bran powder screening machine as claimed in claim 1, wherein: the upper end of the feeding pipe is communicated with the upper end of the inner cylinder, the discharging device further comprises a wind shield and a return spring which are sequentially sleeved outside the main shaft from top to bottom, and the wind shield is in sliding connection with the main shaft and keeps sealed with the main shaft in the sliding process; under the natural state, under the action of the return spring, the wind shield covers the discharge port at the lower end of the discharge pipe.

4. The bran powder screening machine as claimed in claim 3, wherein: the upper end of inner tube is fixed with a casing, the inlet pipe warp the casing with the inner tube intercommunication, the motor is fixed the top of casing, the output shaft of motor with the top coaxial coupling of main shaft, the top cover of main shaft is equipped with one and is located guide blade in the casing.