CN215783776U

CN215783776U - Vertical mill pressure device

Info

Publication number: CN215783776U
Application number: CN202121685025.1U
Authority: CN
Inventors: 张梓颉
Original assignee: Chongqing Yuhong Renewable Resources Co ltd
Current assignee: Chongqing Yuhong Renewable Resources Co ltd
Priority date: 2021-07-23
Filing date: 2021-07-23
Publication date: 2022-02-11
Anticipated expiration: 2031-07-23

Abstract

The utility model relates to the field of powder processing, in particular to a vertical mill pressurizing device which comprises a grinding disc connected to a machine body, a plurality of grinding heads distributed above the grinding disc, and a grinding roller for fixing the grinding heads, wherein one end of the grinding roller is connected with a grinding roller connecting arm, the other end of the grinding roller connecting arm is hinged with the machine body, the middle part of the grinding roller connecting arm is provided with a hinged end, the hinged end is connected with a pressurizing device, and the vertical mill pressurizing device further comprises a buffer device arranged above the grinding disc; the buffer device comprises a buffer fixing piece fixed above the grinding disc, a fixed disc fixed on the lower half portion of the buffer fixing piece, and at least one buffer connecting rod hinged to the circumference of the lower end of the buffer fixing piece, wherein the other end of the buffer connecting rod is hinged to a corresponding grinding roller shaft, and a buffer piece is arranged between the buffer connecting rod and the fixed disc. The utility model can play a certain role of buffering when extruding and grinding materials, and can not cause too large vibration of the grinding head so as to ensure the normal operation of grinding production.

Description

Vertical mill pressure device

Technical Field

The utility model relates to the field of powder processing, in particular to a vertical mill pressurizing device.

Background

The vertical mill is a powder processing device integrating fine crushing, drying, grinding, powder selecting and conveying, and is widely applied to the fields of metallurgy, building materials, chemical industry, mines and the like.

The vertical mill mainly comprises a grinding roller, a grinding disc, a pressurizing and ventilating device, a vertical mill main body and a host PLC electric control system. The general working principle of the vertical mill is as follows: the mill rotates at the horizontal plane, and the material falls to the centre of mill through the feed opening of inlet pipe, receives the centrifugal force effect when the mill rotates, and the edge that the material was got rid of the mill receives rolling of rotatory grinding roller, and the bold material is directly crushed under rotatory grinding roller effect, and the material that the granule is little piles up into the material, and the material is internal carries out interparticle and smashes. The external pressurizing ventilation device enables air flow to enter the vertical mill main body from an air inlet at the lower end of the vertical mill main body, crushed materials are taken away by the air flow after reaching the edge of the grinding disc, material particles with larger weight fall onto the grinding disc again to be ground continuously, and the materials in the air flow are blocked by the rotary blocking piece at the upper part and return to the grinding disc to be ground again. And qualified materials flow out of the mill along with the air flow and are collected by the powder collector.

The existing vertical mill has a problem in the actual use process, materials on the grinding disc can gradually move and accumulate on the grinding roller under the action of centrifugal force, when the materials under the grinding roller accumulate to a certain height due to the centrifugal force, the rolling of the grinding roller can be influenced, the grinding roller is not stable in the rolling process, and the grinding roller is generally maintained at a height and is maintained at the pressure of the roller by a hydraulic system. The existing grinding roller is lack of a corresponding pressurizing device, so that the grinding roller is not stable enough in operation and not stable enough in the process of rolling and grinding materials, and particularly, when the yield is large or materials with poor grindability are ground, the phenomenon of instability in operation of the grinding roller is particularly obvious.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a vertical mill pressurizing device, which solves the problems that the conventional grinding roller lacks a corresponding pressurizing device, so that the grinding roller is not stable enough in operation and not stable enough in the process of rolling and grinding materials.

In order to solve the technical problems, the technical means of the vertical mill pressurizing device adopted by the utility model is as follows: the grinding device comprises a grinding disc connected to a machine body, a plurality of grinding heads distributed above the grinding disc, a grinding roller for fixing the grinding heads, a grinding roller connecting arm connected to one end of the grinding roller, a hinging end hinged to the machine body at the other end of the grinding roller connecting arm, a pressurizing device connected to the hinging end and driving the grinding roller connecting arm to rotate through the hinging end, and a buffer device arranged above the grinding disc; the buffer device comprises a buffer fixing piece fixed above the grinding disc, a fixed disc fixed on the lower half portion of the buffer fixing piece, and at least one buffer connecting rod hinged to the circumference of the lower end of the buffer fixing piece, wherein the other end of the buffer connecting rod is hinged to a corresponding grinding roller shaft, and a buffer piece is arranged between the buffer connecting rod and the fixed disc.

The vertical mill pressurizing device of the technical scheme has the following technical advantages: the grinding head has the advantages that the pressurizing device can drive the grinding roller connecting arm to rotate to realize the movement of the grinding head, the pressurizing device can give a certain buffering effect to the grinding head when the grinding head is subjected to sudden change pressure, when the grinding head is matched with the grinding disc to grind materials, the grinding head is sometimes influenced by accumulated materials or materials with poor grinding easiness, the grinding head is accordingly subjected to larger sudden change pressure, the pressurizing device can maintain the working position state of the grinding head and also can give certain buffering protection to the grinding head and other components, meanwhile, the buffering effect of the pressurizing device is favorable for the continuity of the grinding head when the grinding head grinds the materials, and the balance between the grinding head and the grinding disc pressure during continuous grinding of the materials is ensured. The buffer device connected with the grinding roller shaft can provide certain supporting force for the grinding head at the other end of the grinding head, so that the grinding head is guaranteed to bear the force at two ends when rolling, the grinding head is also more balanced in stress when rolling, contact rolling is facilitated, meanwhile, a buffer piece in the buffer device can play a role in buffering the grinding head when the grinding head is subjected to sudden change pressure to generate movement, continuous rolling of the grinding head is guaranteed, and the material is balanced in stress when the grinding head is ground. When the grinding head is subjected to sudden change pressure of the materials, the pressurizing device and the buffer device can provide certain buffer for the grinding head to protect important parts such as the grinding head and the like, can also ensure the continuity of the grinding head during working, improve the stability of the grinding head during working, enable the ground materials to be stressed more uniformly and further enable the grinding to be more uniform.

As a preferred scheme, the damper comprises a damper main body, a piston rod penetrating through the damper main body and a damping spring positioned at the large end of the piston on the piston rod, wherein the damper main body is filled with oil resistance liquid, a through hole for resistance flow is formed in the piston on the piston rod, and the piston rod is positioned at the highest position in a normal state of the resistance spring; the resistor can effectively buffer the sudden pressure increase of the grinding head, and when each part is protected, the grinding head can stably and continuously grind materials, so that the grinding process is more continuous, and the stress is more uniform when the materials are ground.

Preferably, the pressurizing device comprises a telescopic mechanism connected with the hinged end and a damper fixedly connected with the hydraulic cylinder, the hydraulic cylinder and the damper are of a coaxial integrated structure, and the bottom of the damper is hinged on the machine body; the coaxial integrated structure of the hydraulic cylinder and the damper is beneficial to the force transmission of the hydraulic cylinder and the damper, so that the resistance function of the damper can be effectively exerted.

Preferably, the telescopic mechanism is a hydraulic cylinder.

Preferably, the telescopic mechanism is a threaded elevator, a nut matched with the threaded elevator is arranged on the hinged end, and a screw rod of the threaded elevator is connected with the nut; the cooperation of screw thread lift and nut can be more accurate when the lift height-adjusting, and the nut has the auto-lock nature with the screw thread lift moreover, can bear great sudden change load simultaneously, when the bistrique received great pressure suddenly, also can guarantee the supporting role to the grinding roller.

As a preferred scheme, the buffer part is a spring, and two ends of the spring are sleeved on cylindrical bulges arranged on the buffer connecting rod and the fixed disc; the cylindrical protrusions on the buffer connecting rod and the fixed disc are convenient to install and fix the spring.

As a preferred scheme, two ends of the buffer piece damper are respectively hinged on the buffer connecting rod and the fixed disc; the buffer connecting rod rotates to a certain extent, and the hinge joint is beneficial to playing a better buffer effect.

Preferably, the buffering fixing part is a hollow sleeve, and is connected with a feeding pipe of the vertical mill and used for feeding the grinding disc; the buffering mounting plays fixedly to the bolster in the below for hollow sleeve pipe, also can utilize the cavity characteristic of self, combines the inlet pipe of founding the mill, packs with the mill for giving, and two birds with one stone in the function does not influence the feeding in mill center moreover.

As a preferred scheme, a scraper is fixed at the lower end of the buffering fixing part, the lower end of the scraper is attached to the upper surface of the grinding disc, and the scraper uniformly distributes materials to the edge of the grinding disc; the scraper blade can be with adding the even cloth of material on the mill to the circumferential edge of mill on, because the mill takes place in the circumferential edge of mill with bistrique cooperation grinding, the scraper blade can drag the cloth to the circumferential edge of mill with the material in the middle of the mill, prevents effectively that the material from accumulating in the middle of the mill, the efficiency of influence grinding material.

Drawings

FIG. 1 is a schematic overall appearance of the present invention;

FIG. 2 is an enlarged view A of a portion of FIG. 1;

fig. 3 is a schematic view of a damper.

The main part symbols in the figures are explained as follows:

1. a grinding disc; 2. grinding heads; 3. grinding the roller; 4. a grinding roll shaft; 5. a grinding roller linkage arm; 6. a body; 8. a hydraulic cylinder;

7. a buffer device; 71. a buffer fixing member; 72. fixing the disc; 73. a buffer connecting rod; 74. a buffer member;

9. a damper; 91. a damper main body; 92. a piston rod; 93. a damping spring.

Detailed Description

The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the utility model.

Example 1

As shown in fig. 1, the vertical mill pressurizing device comprises a grinding disc 1 connected to a machine body, a plurality of grinding heads 2 distributed above the grinding disc 1, grinding rollers 3 for fixing the grinding heads 2, the grinding heads 2 are conical, the number of the grinding heads 2 is generally better from 2 to 4, when the grinding disc 1 rotates, the grinding heads 3 roll on the grinding disc, one end of each grinding roller 3 is connected with a grinding roller connecting arm 5, the other end of each grinding roller connecting arm 5 is hinged to the machine body 6, the machine body 6 is a fixed end, a hinged end is arranged in the middle of each grinding roller connecting arm 5, the hinged end is connected with a pressurizing device, the pressurizing device drives the grinding roller connecting arms 5 to rotate through the hinged ends, and the pressurizing device can effectively absorb sudden change force received by the grinding heads 2. The pressurizing device comprises a telescopic mechanism connected with a hinged end and a damper 9 fixedly connected with the telescopic mechanism, the telescopic mechanism and the damper 9 are of a coaxial integrated structure, the bottom of the damper 9 is hinged on the machine body 6, the telescopic mechanism is a hydraulic cylinder 8, a hydraulic rod of the hydraulic cylinder 8 is connected with the hinged end on the grinding roller connecting arm 5, and the bottom of the hydraulic cylinder 8 is connected with a piston rod 92 of the damper 9.

As shown in fig. 2, the buffer device is arranged above the grinding disc, the buffer device comprises a buffer fixing member 71 fixed above the grinding disc 1, a fixed disc 72 fixed on the lower half part of the buffer fixing member 71, and at least one buffer connecting rod 73 hinged on the circumference of the lower end of the buffer fixing member 71, the number of the buffer connecting rods 73 is the same as that of the grinding heads 2, one buffer connecting rod 73 corresponds to one grinding head 2, the other end of the buffer connecting rod 73 is hinged with the corresponding grinding roller shaft 4, and a buffer member 74 for buffering and reducing pressure is arranged between the buffer connecting rod 73 and the fixed disc 72. The buffer member 74 is a spring, and two ends of the spring are sleeved on the cylindrical protrusions arranged on the buffer connecting rod 73 and the fixed disc 72, so that the spring is convenient to mount and fix. The buffer damper has both ends hinged to the buffer link 73 and the fixed plate 72, respectively. The buffering fixing piece 71 is preferably a hollow sleeve, the buffering fixing piece 71 can be connected with a feeding pipe of the vertical mill and used for feeding the grinding disc 1, and the buffering fixing piece 71 is positioned above the middle part of the grinding disc 1 and can facilitate feeding of the grinding disc 1. The lower extreme at buffering mounting 71 is fixed with the scraper blade with the even cloth of material, and the scraper blade is equipped with one at least, distributes outside the circumference of buffering mounting 71, and the lower extreme of scraper blade and the upper surface laminating of mill 1, the scraper blade is fixed on buffering mounting 71, and with 1 relative motion in mill, the scraper blade is with the even cloth of material to 1 edge of mill, is favorable to improving the grinding efficiency of standing the mill.

As shown in fig. 3, the damper includes a damper main body 91, a piston rod 92 penetrating through the damper main body 91, and a damping spring 93 located at a large end of a piston on the piston rod 92, the damper main body 91 is filled with oil resistance liquid, a through hole for resistance flow is provided on the piston rod 92, the piston rod 92 is located at the highest position in a normal state of the resistance spring 93, when the external grinding head 2 is subjected to a large sudden change pressure, the piston rod 92 compresses the damping spring 93, the resistance liquid below the piston of the piston rod 92 flows to the other side of the piston through the piston mountain through hole, the flow rate of the resistance liquid is slow, the piston rod 92 is made to move slowly, the damper thereby achieving buffering of the grinding head 2, the grinding head 2 is protected under a large external pressure, and stable and continuous rolling is achieved.

Example 2

The difference between the embodiment 2 and the embodiment 1 is that in the pressurizing device, the hydraulic cylinder 8 can be replaced by a screw elevator, a nut matched with the screw elevator is arranged on the hinged end, a screw rod of the screw elevator is connected with the nut, the screw elevator drives the nut to move up and down when rotating, the grinding roller connecting arm 5 is driven to swing, the bottom of the screw elevator is fixed on the piston rod 92, and the screw elevator adopts a bottom driving screw rod mode to drive the nut to move up and down.

The working and the principle thereof are as follows: when the grinding head 2 is subjected to sudden pressure, on one hand, the grinding head 2 drives the grinding roller 3 to move, the grinding roller 3 drives the grinding roller link arm 5 to rotate, the grinding roller link arm 5 drives the hydraulic cylinder 8, at the moment, the hydraulic cylinder 8 does not generate displacement, and the hydraulic cylinder 8 drives the lower resistor 9 to properly deform, so that the resistor 9 can buffer the grinding head 2 to a certain degree; on the other hand, the grinding head 2 drives the grinding roller 3 to move, the grinding roller shaft 4 on the grinding roller 3 drives the buffer connecting rod 73 to rotate, the buffer piece 74 between the buffer connecting rod 73 and the fixed disc 72 is compressed by the buffer connecting rod 73, and the buffer piece 74 can buffer the grinding head 2 to a certain degree.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. The utility model provides a found mill pressure device, is including the mill of connection on the organism, the grinding roller of a plurality of bistriques, the fixed bistrique of distribution in the mill top, the one end of grinding roller is connected with the grinding roller linking arm, the other end and the organism of grinding roller linking arm are articulated, the middle part of grinding roller linking arm is equipped with the hinged end, the hinged end is connected with pressure device, pressure device drives the grinding roller linking arm through the hinged end and rotates its characterized in that: the grinding disc device also comprises a buffer device arranged above the grinding disc; the buffer device comprises a buffer fixing piece fixed above the grinding disc, a fixed disc fixed on the lower half portion of the buffer fixing piece, and at least one buffer connecting rod hinged to the circumference of the lower end of the buffer fixing piece, wherein the other end of the buffer connecting rod is hinged to a corresponding grinding roller shaft, and a buffer piece is arranged between the buffer connecting rod and the fixed disc.

2. A vertical mill pressurizing device according to claim 1, wherein: the pressurizing device comprises a telescopic mechanism connected with the hinged end and a damper fixedly connected with the hydraulic cylinder, the hydraulic cylinder and the damper are of a coaxial integrated structure, and the bottom of the damper is hinged on the machine body.

3. A vertical mill pressurizing device according to claim 2, wherein: the damper comprises a damper main body, a piston rod penetrating through the damper main body and a damping spring located at the large end of the piston on the piston rod, wherein oil resistance liquid is filled in the damper main body, a through hole for resistance flow is formed in the piston on the piston rod, and the piston rod is located at the highest position when the damping spring is in a normal state.

4. A vertical mill pressurizing device according to claim 3, wherein: the telescopic mechanism is a hydraulic cylinder.

5. A vertical mill pressurizing device according to claim 3, wherein: the telescopic mechanism is a threaded lift, a nut matched with the threaded lift is arranged on the hinged end, and a screw rod of the threaded lift is connected with the nut.

6. A vertical mill pressurizing device according to claim 1, wherein: the buffer piece is a spring, and two ends of the spring are sleeved on the cylindrical protrusions arranged on the buffer connecting rod and the fixed disk.

7. A vertical mill pressurizing device according to claim 1, wherein: and two ends of the buffer piece damper are respectively hinged on the buffer connecting rod and the fixed disc.

8. A vertical mill pressurizing device according to claim 1, wherein: the buffer fixing piece is a hollow sleeve and is connected with a feeding pipe of the vertical grinding machine and used for feeding the grinding disc.

9. A vertical mill pressure device according to claim 6, characterized in that: the lower extreme of buffering mounting is fixed with the scraper blade, the lower extreme of scraper blade and the upper surface laminating of mill, the scraper blade is with the even cloth of material to mill edge.