CN216605550U

CN216605550U - Closed powder returning system for grinding

Info

Publication number: CN216605550U
Application number: CN202123102253.4U
Authority: CN
Inventors: 梁俊; 于大鹏; 董家海
Original assignee: Jianhua Construction Materials China Co Ltd
Current assignee: Jianhua Construction Materials China Co Ltd
Priority date: 2021-12-06
Filing date: 2021-12-06
Publication date: 2022-05-27
Anticipated expiration: 2031-12-06

Abstract

The utility model provides a closed powder-returning system for grinding, which comprises a grinder, a lifter and a powder concentrator; the mill comprises a first bin, a second bin and a material guide conveying spiral pipe, a partition plate is arranged between the first bin and the second bin, and one end of the material guide conveying spiral pipe is positioned in the second bin and is arranged on the partition plate through a bearing; a discharge port is formed at one end of the material guide conveying spiral pipe close to the partition plate, and a feed port is formed at the other end of the material guide conveying spiral pipe; the discharge port of the mill is connected with the feed inlet of the hoister, the discharge port of the hoister is connected with the feed inlet of the powder concentrator, and the powder return discharge port of the powder concentrator is connected with the feed inlet of the guide conveying spiral pipe. The coarse powder is directly fed into the second bin for grinding through the material guide conveying spiral pipe, repeated crushing is not needed, grinding time is saved, grinding efficiency is improved, consumption of electric energy, grinding bodies, lining plates and other materials is reduced, and service life of grinding equipment is prolonged. Meanwhile, the coarse powder does not pass through one bin, so that a cushion layer formed by the coarse powder in one bin is avoided, and the crushing efficiency is improved.

Description

Closed powder returning system for grinding

Technical Field

The utility model belongs to the technical field of powder equipment, and particularly relates to a closed powder grinding system.

Background

The existing closed-circuit system grinding principle is that a raw material warehouse enters a grinding machine through a belt to be conveyed, the raw material warehouse enters a first bin to be crushed, a second bin is used for grinding, after the second bin is used for grinding, a discharged material enters a powder concentrator through a lifting machine, coarse powder after entering the powder concentrator for classification returns to the head end of the grinding machine to enter the grinding machine to pass through the first bin and the second bin, then the coarse powder is discharged, and after the coarse powder is separated by the powder concentrator, the coarse powder enters the grinding machine for repeated crushing and grinding once, and the process is repeated in a circulating mode. And the coarse powder is separated once again in the powder concentrator, and the coarse powder is returned to the mill again to repeat the previous process from one-bin crushing. The separated fine powder, namely the finished powder, enters a powder warehouse for storage and enters the next process.

The closed-circuit system grinding system has the following problems: the powder discharged from the mill is sorted in the powder sorting machine, the fineness degree is incomplete in sorting and contains a certain proportion of finished powder, the finished powder is repeatedly crushed in the mill, a cushion layer is brought to the steel ball, the crushing efficiency is reduced, the powder is repeatedly ground after entering the grinding bin, the phenomenon of over-grinding is easily produced, and the powder is not easy to discharge. The coarse powder entering the grinding head is crushed in one bin and ground in two bins to complete the whole closed cycle process. In fact, the coarse powder separated by the powder concentrator does not need to be crushed from a first bin of a mill, the form of a grinding body steel ball and a lining plate in the first bin can not grind the coarse powder fundamentally, the coarse powder entering the first bin only passes through the first bin and is conveyed, the powder entering the first bin finally enters a second bin to be ground again, and meanwhile, when the powder and the raw materials enter the first bin together, when the raw materials are wet, water vapor in the bin can cause ball wrapping, so that the ball is seriously pasted and ground, the ball cannot directly collide with the ball and the lining plate, a cushion layer is formed, and the crushing efficiency is reduced! The coarse powder separated by the powder concentrator is crushed in a bin when entering the mill, the time of the powder in the bin in the mill is repeated crushing, only a large amount of electric energy is consumed, the consumption of materials such as a grinding body and a lining plate is consumed, and the service life of the grinding equipment is shortened.

SUMMERY OF THE UTILITY MODEL

Aiming at the technical problems, the utility model provides a grinding closed-circuit powder returning system, which directly feeds coarse powder into a second bin for grinding through a material guide conveying spiral pipe without repeated crushing, saves grinding time, improves grinding efficiency, reduces consumption of electric energy and materials such as a grinding body, a lining plate and the like, and prolongs service life of grinding equipment. Meanwhile, the coarse powder does not pass through one bin, so that a cushion layer formed by the coarse powder in one bin is avoided, and the crushing efficiency is improved.

The technical scheme of the utility model is as follows: a closed-circuit powder return system for grinding comprises a grinder, a lifter and a powder concentrator; the mill comprises a first bin, a second bin and a material guide conveying spiral pipe, a partition plate is arranged between the first bin and the second bin, and one end of the material guide conveying spiral pipe is positioned in the second bin and is arranged on the partition plate through a bearing; a discharge hole is formed in one end, close to the partition plate, of the material guide conveying spiral pipe, and a feed hole is formed in the other end of the material guide conveying spiral pipe; the discharge port of the mill is connected with the feed inlet of the elevator, the discharge port of the elevator is connected with the feed inlet of the powder concentrator, and the powder return discharge port of the powder concentrator is connected with the feed inlet of the guide conveying spiral pipe.

In the scheme, the outer ring of the bearing rotates along with the partition plate, and the inner ring is fixed.

In the above scheme, the material guiding and conveying spiral pipe is parallel to the central line of the cylinder body of the mill.

In the above scheme, the spiral rotating shaft of the material guiding and conveying spiral pipe is connected with the rotary driving mechanism.

Further, the rotary driving mechanism is connected with a motor.

In the scheme, a steady flow bin is arranged above the feeding hole of the material guide conveying spiral pipe.

Further, a powder return discharge port of the powder concentrator is connected with the flow stabilizing bin through a powder return chute.

In the above scheme, the other end of the material guiding and conveying spiral pipe is arranged on the support.

In the above scheme, the finished product powder discharge port of the powder concentrator is used for being connected with the finished product tank.

Compared with the prior art, the utility model has the beneficial effects that:

according to the utility model, the coarse powder directly enters the second bin for grinding through the guide conveying spiral pipe without repeated crushing, so that the grinding time is saved, the grinding efficiency is improved, the consumption of electric energy and materials such as a grinding body and a lining plate is reduced, and the service life of grinding equipment is prolonged; meanwhile, the coarse powder does not pass through one bin, so that a cushion layer formed by the coarse powder in one bin is avoided, and the crushing efficiency is improved.

Drawings

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

In the figure: 1. grinding; 2. a hoist; 3. selecting a powder machine; 4. a bin; 5. a second bin; 6. a material guiding and conveying spiral pipe; 7. a partition plate; 8. a support; 9. a steady flow bin; 10. a powder return chute; 11. a housing; 12. a spiral rotating shaft.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "axial," "radial," "vertical," "horizontal," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Fig. 1 shows a preferred embodiment of the grinding closed-circuit flour-returning system, which comprises a mill 1, a lifter 2 and a powder concentrator 3; the mill 1 comprises a first bin 4, a second bin 5 and a material guiding and conveying spiral pipe 6, a partition plate 7 is arranged between the first bin 4 and the second bin 5, and one end of the material guiding and conveying spiral pipe 6 is positioned in the second bin 5 and is arranged on the partition plate 7 through a bearing; a discharge hole is formed in one end, close to the partition plate 7, of the material guide conveying spiral pipe 6, and a feed hole is formed in the other end of the material guide conveying spiral pipe; the discharge hole of the mill 1 is connected with the feed inlet of the elevator 2, the discharge hole of the elevator 2 is connected with the feed inlet of the powder concentrator 3, and the powder return discharge hole of the powder concentrator 3 is connected with the feed inlet of the guide conveying spiral pipe 6.

According to the present embodiment, the material guiding and conveying spiral pipe 6 is preferably parallel to the central line of the cylinder body of the mill 1.

According to the present embodiment, it is preferable that the spiral shaft 12 of the material guiding and conveying spiral pipe 6 is connected to a rotation driving mechanism. Preferably, the rotary driving mechanism is connected as a motor.

According to the embodiment, preferably, the outer ring of the bearing rotates along with the partition plate 7, and the inner ring is fixed, so that the shell 11 of the guide material conveying spiral pipe 6 does not rotate along with the cylinder body of the mill 1.

The material guide conveying spiral pipe 6 is connected with the rotary driving mechanism, and the shell does not rotate along with the cylinder body of the grinding machine 1, so that on one hand, the working efficiency is improved, on the other hand, the working weight of the grinding machine 1 cannot be increased, and the service life of the grinding equipment is further prolonged.

According to the embodiment, preferably, a steady flow bin 9 is arranged above the feeding hole of the material guiding and conveying spiral pipe 6, so that the powder entering the material guiding and conveying spiral pipe 6 is stabilized.

According to the embodiment, preferably, the powder return discharge port of the powder concentrator 3 is connected with the steady flow bin 9 through the powder return chute 10.

According to the present embodiment, it is preferable that the other end of the guide-conveying spiral pipe 6 is mounted on the support 8.

According to the present embodiment, preferably, the finished product powder outlet of the powder concentrator 3 is used for being connected with a finished product tank.

The material from the mill 1 is sent into a powder concentrator 3 through a lifter 2, after the powder concentrator 3 is subjected to powder concentration, the finished powder enters a finished product tank, the material to be subjected to secondary processing is sent into a material guide conveying spiral pipe 6 through a powder return chute 10, and coarse powder directly enters a secondary bin 5 through the material guide conveying spiral pipe 6 to be ground without repeated crushing, so that the grinding time is saved, the grinding efficiency is improved, the consumption of electric energy, grinding bodies, lining plates and other materials is reduced, and the service life of grinding equipment is prolonged; meanwhile, the coarse powder does not pass through the first bin 4, so that a cushion layer formed in the coarse powder in the first bin 4 is avoided, and the crushing efficiency is improved.

The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.

Claims

1. A grinding closed-circuit powder returning system is characterized by comprising a grinding machine (1), a lifting machine (2) and a powder selecting machine (3); the mill (1) comprises a first bin (4), a second bin (5) and a material guiding and conveying spiral pipe (6), a partition plate (7) is arranged between the first bin (4) and the second bin (5), and one end of the material guiding and conveying spiral pipe (6) is located in the second bin (5) and is installed on the partition plate (7) through a bearing; a discharge hole is formed in one end, close to the partition plate (7), of the material guide conveying spiral pipe (6), and a feed hole is formed in the other end of the material guide conveying spiral pipe; the discharge hole of the mill (1) is connected with the feed inlet of the elevator (2), the discharge hole of the elevator (2) is connected with the feed inlet of the powder concentrator (3), and the powder return discharge hole of the powder concentrator (3) is connected with the feed inlet of the guide conveying spiral pipe (6).

2. The pulverizing closed circuit flour-returning system of claim 1, characterized in that the outer ring of the bearing rotates with the baffle plate (7), and the inner ring is fixed.

3. The pulverizing closed circuit flour-returning system according to claim 1, characterized in that the guide material conveying spiral pipe (6) is parallel to the center line of the cylinder of the mill (1).

4. The pulverizing closed circuit flour return system according to claim 1, characterized in that the spiral shaft (12) of the guide material conveying spiral pipe (6) is connected with a rotary driving mechanism.

5. The pulverizing closed circuit flour return system of claim 4, wherein the rotary driving mechanism is connected as a motor.

6. The grinding closed circuit flour return system according to claim 1, wherein a steady flow bin (9) is arranged above a feed inlet of the guide material conveying spiral pipe (6).

7. The grinding closed circuit returned flour system according to claim 6, wherein the returned flour discharge port of the powder concentrator (3) is connected with the steady flow bin (9) through the returned flour chute (10).

8. The pulverizing closed circuit flour return system according to claim 1, characterized in that the other end of the guide material conveying spiral pipe (6) is mounted on a support (8).

9. The grinding closed circuit flour return system according to claim 1, characterized in that a finished product powder outlet of the powder concentrator (3) is used for being connected with a finished product tank.