CN216173136U

CN216173136U - Self-suction type pulverizer

Info

Publication number: CN216173136U
Application number: CN202122505600.1U
Authority: CN
Inventors: 李汉平
Original assignee: Leshan Jinggong Technology Co ltd
Current assignee: Leshan Jinggong Technology Co ltd
Priority date: 2021-10-18
Filing date: 2021-10-18
Publication date: 2022-04-05
Anticipated expiration: 2031-10-18

Abstract

The utility model provides a self-suction type grinder capable of improving the feeding and discharging speeds of a grinding device, which comprises the grinding device, a discharging cavity, an air pipe and a centrifugal fan, wherein the grinding device is arranged in the grinding cavity; the centrifugal fan comprises a fan shell, a driving shaft and an impeller, the driving shaft is mounted on the fan shell, one end of the driving shaft extends into the fan shell, the impeller is mounted at one end of the driving shaft extending into the fan shell, an axial air inlet is formed in the fan shell, a discharge hole is formed in the side face of the discharge cavity, the air pipe comprises a straight pipe flow guide section and right-angled elbow sections arranged at two ends of the straight pipe flow guide section, one of the right-angled elbow sections is connected with the air inlet, and the other right-angled elbow section is connected with the discharge hole. The utility model improves the processing efficiency of the crusher.

Description

Self-suction type pulverizer

Technical Field

The utility model relates to the technical field of crushers, in particular to a self-suction type crusher.

Background

The self-suction grinder is widely used for processing various agricultural and sideline products. The self-suction type pulverizer mainly comprises a pulverizing device, a fan, a separator, a driving motor and the like, wherein a discharging cavity communicated with the pulverizing cavity is arranged below the pulverizing cavity of the pulverizing device, one end of the fan is communicated with the discharging cavity, the other end of the fan is connected with a feeding hole of the separator through a discharging pipe, and the fan adopts a centrifugal fan. The drive motor typically drives both the fan and the comminution device. In order to improve the processing efficiency of the crusher, a main shaft of the existing crushing device is provided with a centrifugal blade.

One of the structures of the existing self-priming pulverizer is that a centrifugal fan is arranged below or obliquely below a pulverizing device, an air inlet of the centrifugal fan is directly connected with one end of a discharging cavity, and the centrifugal fan adopts a tangential direction or a direction approximately along the tangential direction to supply air to a housing of the fan, such as: application No. CN202022055793.0, a self-priming pulverizer. As shown in FIG. 1, when the impeller 12 of the centrifugal fan with such a structure rotates along with the driving shaft 11, the air flow in the fan housing 11 flows outwards along the radial direction, so that when the air flow passes through the outlet of the discharging cavity 2, a large turbulent flow area 21 is formed at the discharging opening of the discharging cavity 2, meanwhile, the air flow in the discharging cavity is influenced by the crushing device, a turbulent flow is also formed in the discharging cavity, and the feeding and discharging speeds of the crushing device are influenced by the turbulent flow and the turbulent flow area 21, so that the processing efficiency of the crushing machine is greatly reduced.

In order to improve machining efficiency, another kind of structure has now appeared, and centrifugal fan sets up in reducing mechanism's below, is equipped with the axial air intake on the fan casing, and centrifugal fan passes through the air-supply line to be connected with the discharge gate of unloading chamber side, and the tuber pipe is the straight tube, and centrifugal fan can realize the axial air inlet, if: application No. CN202030225507.3, pulverizer. Although the structure can improve certain feeding and discharging speeds, the effect is not obvious enough.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of providing a self-suction type pulverizer which can obviously realize the feeding and discharging speeds.

The technical scheme adopted by the utility model for solving the technical problems is as follows: a self-suction type pulverizer comprises a pulverizing device, a discharge cavity, an air pipe and a centrifugal fan; the centrifugal fan comprises a fan shell, a driving shaft and an impeller, the driving shaft is mounted on the fan shell, one end of the driving shaft extends into the fan shell, the impeller is mounted at one end of the driving shaft extending into the fan shell, an axial air inlet is formed in the fan shell, a discharge hole is formed in the side face of the discharge cavity, the air pipe comprises a straight pipe flow guide section and right-angled elbow sections arranged at two ends of the straight pipe flow guide section, one of the right-angled elbow sections is connected with the air inlet to achieve axial feeding to the fan shell, and the other right-angled elbow section is connected with the discharge hole to achieve discharging along the axial direction of a main shaft of the crushing device.

Further, the length of the straight pipe flow guide section is 250-800 mm.

Further, the impeller comprises a first baffle plate, a second baffle plate and a plurality of blades; the blades are arranged between the first baffle and the second baffle, one end of each blade is fixedly connected with the first baffle, and the other end of each blade is fixedly connected with the second baffle; the first baffle is fixedly connected with the driving shaft, and the second baffle is provided with an inner air inlet corresponding to the air inlet.

Further, the inner air inlet is circular.

Further, the distance from the inner edge of one end, connected with the second baffle, of the blade to the axis of the inner air inlet is greater than or equal to the radius of the inner air inlet, and the distance from the lower edge of one end, connected with the first baffle, of the blade to the axis of the inner air inlet is smaller than the radius of the inner air inlet.

Further, the centrifugal fan is arranged in the obliquely downward direction of the crushing device.

Furthermore, a detachable cover plate is arranged on the fan shell.

The utility model has the beneficial effects that: this rubbing crusher reducing mechanism tuber pipe is equipped with straight tube water conservancy diversion section and two quarter bend sections, and the air current is forced to turn to and the direction of the straight tube water conservancy diversion section of tuber pipe through many times when flowing from ejection of compact chamber, and the flow direction of guide air current that can be better reduces the random flow, can increase substantially the feeding of rubbing crusher, arrange the material speed, improves rubbing crusher's work efficiency.

Drawings

FIG. 1 is a schematic view of a centrifugal fan feeding structure of a self-priming pulverizer;

FIG. 2 is a schematic structural view of the present invention;

FIG. 3 is a top view of FIG. 2;

FIG. 4 is a schematic structural view of the discharge chamber;

FIG. 5 is a schematic structural view of an air duct;

FIG. 6 is a front view schematic of the centrifugal fan of the present invention;

FIG. 7 is a schematic top view of the centrifugal fan of the present invention;

FIG. 8 is a cross-sectional view taken along A-A of FIG. 7;

shown in the figure: the device comprises a centrifugal fan 1, a discharge cavity 2, a crushing device 3, an air pipe 4, a fan shell 11, an impeller 12, a driving shaft 13, an air inlet 14, a first baffle 15, a second baffle 16, blades 17, a turbulent flow area 21, a discharge hole 22, a main shaft 31, a straight pipe flow guide section 41, a right-angled elbow section 42, a cover plate 111, an inner edge 121 and an inner air inlet 161.

Detailed Description

The utility model is further illustrated with reference to the following figures and examples.

As shown in fig. 1 to 8, the self-priming crusher of the present invention comprises a crushing device 3, a discharging cavity 2, an air pipe 4 and a centrifugal fan 1. The centrifugal fan 1 comprises a fan shell 11, a driving shaft 13 and an impeller 12, wherein the driving shaft 13 is installed on the fan shell 11, one end of the driving shaft 13 extends into the fan shell 1, the impeller 12 is installed on one end of the driving shaft 13 extending into the fan shell 1, an axial air inlet 14 is formed in the fan shell 11, and a discharge hole 22 is formed in the side face of the discharge cavity 2. The air pipe 4 comprises a straight pipe flow guide section 41 and right-angled elbow sections 42 arranged at two ends of the straight pipe flow guide section 41, and the axis of the right-angled elbow section 4 is perpendicular to the axis of the straight pipe flow guide section 41 to form a direct elbow. One of the quarter bend sections 42 is connected to the air inlet 14 for axial feeding into the fan housing 11. The other quarter bend section 42 is connected to the discharge opening 22 for discharging in the axial direction of the main shaft 31 of the vertical comminution apparatus 3, namely: the axis of the quarter bend section 42 connected to the outlet opening 22 is parallel to the axis of the main shaft 31 of the vertical comminution apparatus 3.

When the pulverizer works, the airflow forms centrifugal airflow under the action of centrifugal blades of the pulverizing device, and the airflow is influenced by the centrifugal blades of the pulverizing device and can generate turbulent flow in the discharging cavity 2 after entering the discharging cavity 2. Because the quarter bend section 42 is connected with the discharge hole 22, so as to realize the discharge along the axial direction of the main shaft 31 of the vertical crushing device 3, the air flow can enter the first straight pipe diversion section 41 only by forced steering, and after entering the first straight pipe diversion section 41, the air flow turns to enter the straight pipe diversion section 41 again, and then turns to enter the second quarter bend section 42, and finally enters the fan shell 11 from the quarter bend section 42 along the axial air inlet 14.

The length of straight pipe water conservancy diversion section is according to reducing mechanism and centrifugal fan's concrete structural design, and the accessible realizes obtaining, and wherein, the length of straight pipe water conservancy diversion section 41 is in 250 ~ 800mm, and the effect is best.

Under the condition that other structures are the same, after adopting above-mentioned mode, compare an application number CN202022055793.0 from the efficiency of inhaling formula rubbing crusher and promoted, this rubbing crusher efficiency has promoted 75% ~ 80%, compares application number CN 202030225507.3's rubbing crusher, this rubbing crusher's efficiency has promoted 60% ~ 70%.

The impeller 12 may adopt an open impeller structure, and in the present invention, as shown in fig. 6 to 8, the impeller 12 includes a first baffle 15, a second baffle 16 and a plurality of blades 17, wherein the number of the blades 17 is 5; the blade 17 is arranged between the first baffle 15 and the second baffle 16, one end of the blade is fixedly connected with the first baffle 15, and the other end of the blade is fixedly connected with the second baffle 16; the first shutter 15 is fixedly connected to the drive shaft 13. The fixing can be welding, bolt connection, etc. The second baffle 16 is provided with an inner air inlet 161 corresponding to the air inlet 14. The inner intake vent 161 may be of various shapes, preferably circular. After the powder airflow enters the fan shell through the inner air inlet 161, the powder airflow can only flow along a channel enclosed by the two adjacent blades 17, the first baffle 15 and the second baffle 16, the centrifugal fan is higher in efficiency, the efficiency of the pulverizer can be further improved, meanwhile, the powder can be prevented from contacting with a side plate of the fan shell, and the service life of the centrifugal fan can be prolonged.

The radial end of the blade 17 can extend to the rotation center of the fan casing 11, in the present invention, the distance from the inner edge 121 of the end of the blade 17 connected with the second baffle 16 to the axis of the inner air inlet 161 (a straight line passing through the center of the inner air inlet and perpendicular to the radial direction of the inner air inlet) is greater than or equal to the radius of the inner air inlet 161, and the distance from the inner edge 121 of the end of the blade 17 connected with the first baffle 15 to the axis of the inner air inlet 161 is less than the radius of the inner air inlet 161. Therefore, the air flow can enter the fan shell more conveniently, and the processing efficiency of the pulverizer can be improved.

The centrifugal fan 1 is arranged below the crushing device 3, so that the crushing device can be conveniently discharged, the height of the crushing device 3 can be increased, and the crushing device is inconvenient to feed, so that the processing efficiency of the crusher can be influenced. As shown in FIG. 2, the centrifugal fan 1 is arranged obliquely below the crushing device 3, so that the air pipe 4 is also arranged obliquely downward, the height of the crushing device 3 is reduced, and the comprehensive influence on the processing efficiency of the crusher is improved to a certain extent.

In order to facilitate the maintenance and repair of the centrifugal fan, a detachable cover plate 111 (see fig. 2) is provided on the fan housing 11. The cover plate 111 may be detachably connected to the fan housing 11 by means of bolts, clips, or the like. In the figure, the cover 111 is provided on the side surface of the fan case 11.

Claims

1. A self-suction grinder comprises a grinding device (3), a discharging cavity (2), an air pipe (4) and a centrifugal fan (1); centrifugal fan (1) includes fan casing (11), drive shaft (13) and impeller (12), on drive shaft (13) installation fan casing (11), one end extends to in fan casing (11), one end in drive shaft (13) extension to fan casing (11) is installed in impeller (12), be equipped with axial air intake (14), its characterized in that on fan casing (11): the side of unloading chamber (2) is equipped with discharge gate (22), tuber pipe (4) include straight tube water conservancy diversion section (41) and set up right angle elbow section (42) at straight tube water conservancy diversion section (41) both ends, one of them right angle elbow section (42) are connected with air intake (14) to realize to fan casing body (11) axial feeding, another right angle elbow section (42) are connected with discharge gate (22), in order to realize the main shaft axis direction ejection of compact along reducing mechanism (3).

2. The self-priming pulverizer of claim 1, wherein: the length of the straight pipe flow guide section (41) is 250-800 mm.

3. The self-priming pulverizer of claim 1, wherein: the impeller (12) comprises a first baffle plate (15), a second baffle plate (16) and a plurality of blades (17); the blades (17) are arranged between the first baffle plate (15) and the second baffle plate (16), one end of each blade is fixedly connected with the first baffle plate (15), and the other end of each blade is fixedly connected with the second baffle plate (16); the first baffle (15) is fixedly connected with the driving shaft (13), and the second baffle (16) is provided with an inner air inlet (161) corresponding to the air inlet (14).

4. The self-priming pulverizer as claimed in claim 3, wherein: the inner air inlet (161) is circular.

5. The self-priming pulverizer as claimed in claim 4, wherein: the distance from the inner edge of one end, connected with the second baffle (16), of the blade (17) to the axis of the inner air inlet (161) is larger than or equal to the radius of the inner air inlet (161), and the distance from the lower edge of one end, connected with the first baffle (15), of the blade (17) to the axis of the inner air inlet (161) is smaller than the radius of the inner air inlet (161).

6. The self-priming pulverizer of claim 1, wherein: the centrifugal fan (1) is arranged in the oblique lower direction of the crushing device (3).

7. The self-priming pulverizer of claim 1, wherein: the fan shell (11) is provided with a detachable cover plate (111).