CN210753092U

CN210753092U - Millstone type pulverizer with guide fan blades

Info

Publication number: CN210753092U
Application number: CN201921180202.3U
Authority: CN
Inventors: 于洪
Original assignee: Zhengzhou Jianuo Industrial Co ltd
Current assignee: Zhengzhou Jianuo Industrial Co ltd
Priority date: 2019-07-25
Filing date: 2019-07-25
Publication date: 2020-06-16
Anticipated expiration: 2029-07-25

Abstract

The utility model relates to a mill type pulverizer with guide fan blades, which comprises a mill cover, a mill body shell, a transmission device, a gear ring, a mill disc, a backflow ring, a classifier and a transmission shaft, wherein the bottom end of the mill body shell is connected with the internal transmission shaft through the transmission device; the mill includes mill frame and removable hitting post, and the mill frame includes collar and outer crown plate, and the face uses the collar to distribute as the outside radiation in center on lieing in the mill frame has a plurality of direction flabellums, and a plurality of removable hitting posts are fixed to be set up in the mill circumference outside. The utility model relates to a succinct, novel, direction flabellum follows the high-speed rotation of mill, produces and throws the air current to the outer circumference of mill, effectively blocks passing through of short circuit air current, has improved the efficiency of milling machine greatly, makes powder particle size distribution more concentrated simultaneously, has effectively improved the quality and the yield of product.

Description

Millstone type pulverizer with guide fan blades

Technical Field

The utility model relates to a milling machine makes technical field, concretely relates to mill formula milling machine with direction flabellum.

Background

The pulverizer has a simple structure and high pulverizing efficiency, and is widely applied. The working principle is that materials to be crushed are thrown out of an impact gear ring along the tangential direction through impact columns on a grinding disc rotating at a high speed, crushed in a crushing area of a pulverizer, and then enter a separation area from top to bottom along the outer wall of a backflow ring via an inner wall under the action of wind force of an induced draft fan to be sprayed out of a discharge port after passing through a fan blade classifier. Because the centrifugal force that the high-speed rotation of classificator produced makes the material pass through hindering in this separation process, when the granule is great, the resistance is great, and coarse grain material can not be through the classificator forced to revolve and smash once more on the mill, and only after the granule reached certain particle diameter, the draught fan wind-force just can pass the fan blade classificator to its suction when being greater than the resistance of branch machine to it, breaks away from the constraint and discharges the milling machine via the discharge gate. The existing flour mill can be divided into three areas, namely 1) a crushing area A, namely an area formed by a hitting column, a gear ring inner wall and a backflow ring outer wall, and has the main function of crushing material particles; 2) the screening area B, namely an area formed by the impeller classifier and the inner wall of the backflow ring, is mainly used for screening materials with certain particle size; 3) the return area C, which is the area formed by the bottom of the classifier, the bottom of the return ring and the middle part of the grinding disc, mainly plays a role of throwing coarse powder which does not pass through the impeller of the classifier out into the crushing area A again. The current problem lies in the return area C, because the material and the air current are not ideal unidirectional flow, the flow of the air current can select a short path, the preferred path of the air current is often from the gap between the bottom of the return ring and the grinding disc, and directly upwards enters the classifier, which will affect the coarse powder to enter the crushing area a again, the flow direction of the air current is as shown in fig. 1, the flow direction of the large particle material is opposite to the flow direction of the air current, the large particle material will be retained in the return area C for a long time, and part of the material crushed to reach the target particle size will also enter the return area C to be retained and pushed into the crushing area a again to be crushed, which will cause the great reduction of the crushing efficiency of.

Disclosure of Invention

In order to solve the problems, the utility model provides a mill flour mill with guide fan blades, the guide fan blades rotate with the mill at a high speed to generate air flow projected to the outer circumference of the mill, thereby changing the air flow direction of the gap between the bottom of the backflow ring in the mill and the outer circumference of the mill, blocking the passing of short-circuit air flow, leading the crushed material to enter the cavity of the mill flour mill according to a preset route, and greatly improving the efficiency of the mill flour mill; excessive crushing of materials is reduced, so that the particle size distribution of the powder is more concentrated, and the quality and yield of the product are effectively improved. Therefore, the utility model provides a following technical scheme:

a mill type pulverizer with guide fan blades comprises a mill cover, a mill body shell, a transmission device, a gear ring, a mill disc, a backflow ring, a classifier and a transmission shaft, wherein the bottom end of the mill body shell is connected with the transmission shaft inside through the transmission device; the grinding disc comprises a grinding disc frame and replaceable impact columns, a shaft hoop is arranged in the center of the grinding disc frame, a plurality of guide fan blades are radially distributed on the upper surface of the grinding disc frame by taking the shaft hoop as the center, and the replaceable impact columns are fixedly arranged on the outer circumferential surface of the grinding disc frame through retaining nuts.

In the above, the height H of the guide fan blade is greater than the height of the gap between the backflow ring and the grinding disc.

In the above, the radial connection between the guide fan blade and the shaft hoop and the grinding disc rack is set at an included angle of α, and 30 degrees is less than or equal to α is less than or equal to 60 degrees, and the length L of the fan blade is greater than the distance between the outer circumference of the shaft hoop and the outer circumference R of the far end of the fan blade.

And a plurality of striking column mounting holes are formed in the outer edge of the circumference of the grinding disc frame.

The grinding wheel is fixedly provided with a grinding cover, a grinding body shell is arranged on the grinding wheel, a discharging hole is formed in the grinding cover, a feeding hole is formed in one side of the grinding body shell, corresponding to the outer side of the replaceable impact column grinding disc, and an air inlet is formed in the bottom end of the other side of the grinding body shell.

Has the advantages that:

the utility model relates to a rationally novel, design a mill with direction flabellum, direction flabellum follows the high-speed rotation of mill, produces and throws the air current to the mill outer circumference, and the large particle diameter granule after the grader sieves flows down after the backward flow circle, throws into crushing area fast again under the effect of direction flabellum, blocks the passing through of short-circuit air current simultaneously, makes the air current that smashes the material and get into via the air intake enter the milling machine cavity according to predetermined route, has improved the efficiency of milling machine greatly; the probability that the crushed fine particle materials enter the return area C is reduced, so that excessive crushing of the fine particle materials is reduced, the powder particle size distribution is more concentrated, and the quality and yield of the product are effectively improved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to these drawings.

FIG. 1 is a schematic view of the gas flow inside the raw mill according to an embodiment of the present invention;

FIG. 2 is a schematic view of the gas flow structure inside the main body according to the embodiment of the present invention;

fig. 3 is a schematic top view of a grinding disc according to an embodiment of the present invention;

FIG. 4 is a schematic view of a mounting structure of a grinding disc and a striking post according to an embodiment of the present invention;

fig. 5 is a schematic bottom view of the grinding disc according to the embodiment of the present invention.

Reference numerals:

1-discharge port, 2-grinding cover, 3-feeding port, 4-grinding body shell, 5-transmission device, 6-air inlet, 7-gear ring, 8-grinding disc, 801-grinding disc frame, 802-shaft hoop, 803-guide fan blade, 804-column hitting mounting hole, 9-backflow ring, 10-classifier, 11-transmission shaft, 12-replaceable column hitting, 13-retaining nut, 14-binding port mounting table, A-crushing area, B-sieving area and C-returning area.

Detailed Description

In order to make those skilled in the art better understand the solution of the embodiments of the present invention, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings and the implementation manner.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present application, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are conventionally placed in use, and are used only for convenience of describing the present application and for simplicity of description, and do not indicate or imply that the devices or elements being referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application.

In the description of the present application, it is also to be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Embodiment 1, refer to fig. 2 to 5, a millstone type pulverizer with guide fan blades comprises a millstone cover 2, a millstone body shell 4, a transmission device 5, a gear ring 7, a millstone 8, a backflow ring 9, a classifier 10 and a transmission shaft 11, wherein the bottom end of the millstone body shell 4 is connected with the transmission shaft 11 inside through the transmission device 5, the millstone 8 and the classifier 10 are fixedly sleeved on the transmission shaft 11, the backflow ring 9 is fixedly arranged between the millstone 8 and the classifier 10, and the gear ring 7 is fixedly arranged on a binding port mounting table 14 on the inner wall of the millstone body shell 4; the grinding disc 8 comprises a grinding disc frame 801 and replaceable impact columns 12, a shaft hoop 802 is arranged in the center of the grinding disc frame 801, a plurality of guide fan blades 803 are radially distributed on the upper plate surface of the grinding disc frame 801 by taking the shaft hoop 802 as the center, a plurality of impact column mounting holes 804 are arranged on the outer edge of the circumference of the grinding disc frame 801, and the replaceable impact columns 12 are fixedly arranged on the outer circumferential plate surface of the grinding disc frame 801 through retaining nuts 13.

Referring to fig. 3, the height H of the guide fan blade 803 is greater than the height of the gap between the backflow ring 9 and the grinding disc 8, the guide fan blade 803 is radially connected with the shaft hoop 802 and the grinding disc frame 801 to form an included angle of α, 30 degrees is less than or equal to α degrees is less than or equal to 60 degrees, the length L of the guide fan blade is greater than the distance between the outer circumference of the shaft hoop (802) and the outer circumference R of the far end of the fan blade, the guide fan blade 803 of the structure rotates at high speed with the grinding disc 8 body along with the high-speed rotation of the transmission shaft 11 to generate an air flow which is projected towards the outer circumference of the grinding disc 8, large-size particles which are screened by the classifier 10 are rapidly thrown out into the grinding disc 8 and enter a grinding area a, and an outward projected air flow is formed between the bottom of the backflow ring 9 and the outer edge of the grinding disc 8 to block the passage of short-circuit air flow, so that the ground material and the air flow entering the cavity of the grinding mill along a predetermined route, the improved flow direction of the air inside the grinding mill is shown in fig. 2, which greatly improves the efficiency of the grinding mill, and reduces the particle size of the ground material and effectively.

Referring to fig. 1 or 2, a discharge port 1 is fixedly arranged at the center of a grinding cover 2 above a corresponding classifier 10, a feeding port 3 is fixedly arranged at one side of a grinding body shell 4 outside a corresponding replaceable impact column grinding disc 8, an air inlet 6 is arranged at the bottom end of the other side of the grinding body shell 4, the discharge port 1 is connected with a collection and dust removal system for finished materials through an induced draft fan system, and the feeding port 3 is connected with a screw feeder for feeding.

While the preferred embodiments of the present invention have been described in the foregoing illustrative manner, it will be understood by those skilled in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the present invention.

Claims

1. The utility model provides a mill formula milling machine with direction flabellum which characterized in that: the grinding device comprises a grinding cover (2), a grinding body shell (4), a transmission device (5), a gear ring (7), a grinding disc (8), a backflow ring (9), a classifier (10) and a transmission shaft (11), wherein the bottom end of the grinding body shell (4) is connected with the transmission shaft (11) inside through the transmission device (5), the grinding disc (8) and the classifier (10) are fixedly sleeved on the transmission shaft (11), the backflow ring (9) is fixedly arranged between the grinding disc (8) and the classifier (10), and the gear ring (7) is fixedly arranged on a binding port mounting table (14) on the inner wall of the grinding body shell (4); the grinding disc (8) comprises a grinding disc frame (801) and replaceable impact columns (12), a shaft hoop (802) is arranged in the center of the grinding disc frame (801), a plurality of guide fan blades (803) are radially distributed on the upper plate surface of the grinding disc frame (801) by taking the shaft hoop (802) as the center, and the replaceable impact columns (12) are fixedly arranged on the outer circumferential plate surface of the grinding disc frame (801) through retaining nuts (13).

2. Mill according to claim 1, characterized in that: the height H of the guide fan blade (803) is larger than the height of a gap between the backflow ring (9) and the grinding disc (8).

3. The mill according to claim 1, wherein the guide blades (803) are radially connected to the collar (802) and the mill frame (801) at an angle of α °, 30 ° or more and α ° or less and 60 ° or less, and the length L of the blades is greater than the distance between the outer circumference of the collar (802) and the outer circumference R of the blade remote end.

4. Mill according to claim 1, characterized in that: a plurality of striking column mounting holes (804) are arranged on the circumferential outer edge of the grinding disc rack (801).

5. Mill according to claim 1, characterized in that: a discharge port (1) is fixedly arranged at the center of the grinding cover (2) above the corresponding classifier (10), a feeding port (3) is fixedly arranged at one side of the grinding body shell (4) outside the corresponding replaceable impact column grinding disc (8), and an air inlet (6) is arranged at the bottom end of the other side of the grinding body shell (4).