WO2020042679A1

WO2020042679A1 - Multi-roller vertical cement roller mill having alternately standby grinding rollers

Info

Publication number: WO2020042679A1
Application number: PCT/CN2019/087902
Authority: WO
Inventors: 王泽�; 丁同华; 丁浩; 丁业
Original assignee: 江苏鹏飞集团股份有限公司
Priority date: 2018-08-31
Filing date: 2019-05-22
Publication date: 2020-03-05
Also published as: CN109127005A; CN109127005B

Abstract

A multi-roller vertical cement roller mill (20) having alternately standby grinding rollers, being used for milling materials, and comprising: a grinding disk (5) for placing materials; a plurality of grinding roller groups (17) provided above the grinding disk (5), each grinding roller group (17) having two grinding rollers (1-4) symmetrically provided on two sides of the grinding disk (5); a plurality of swing mechanisms (19) correspondingly connected to the grinding rollers (1-4), and each swing mechanism (19) being used for controlling the swing grinding of the corresponding grinding roller (1-4); and a hydraulic control device (6) connected to the plurality of swing mechanisms (19), the hydraulic control device (6) being able to selectively control one grinding roller group (17) of the plurality of grinding roller groups (17) to swing to grind materials by means of the plurality of swing mechanisms (19), while the remaining grinding roller groups (17) do not work so as to be maintained or cleaned.

Description

[Name of the invention formulated by ISA according to Rule 37.2] Multi-roller cement vertical roller mill with honing rollers backing up to each other

Technical field

The present invention relates to a vertical roller mill, and in particular to a multi-roller cement vertical roller mill which is reserved for each other.

Background technique

With the continuous development of cement production technology and the growing size of the cement industry, it has become a trend that roller vertical mills are widely used in the cement industry. The reason why roller vertical mills are widely recognized is mainly because of their working principles, grinding The mechanism, equipment structure, and system processability all have their unique advantages. For example, the process system is simple and easy to control. It can make extensive use of the exhaust gas from the preheater kiln, and save energy consumption, high milling efficiency, and ball milling. Compared with the system, it has a small footprint, simple process system, low capital investment, low energy consumption, low metal consumption, and low noise. Both the system and the stand-alone machine have a smaller weight than the ball mill, which can save a lot of metal materials. In recent years, roller mills have been widely used in domestic and foreign cement production.

However, most of the vertical roller mills in the prior art are pressure-type vertical mills of Loesche mills, that is, the rollers are pressurized by a hydraulic cylinder tensioning device placed inside the column. This structure not only occupies a large area, It is heavy and the installation and maintenance of the hydraulic cylinder is extremely inconvenient.

Summary of the Invention

The technical problem to be solved by the present invention is to provide a multi-roller cement vertical roller mill which is reserved for each other to solve the above technical problems. The specific technical solution is as follows: Provide a multi-roller cement vertical roller mill which is used for each other. For the grinding of materials, the multi-roller cement vertical roller mills which are reserved for each other include grinding discs for placing materials; multiple grinding roller groups are arranged above the grinding discs, and the number of grinding rollers of each grinding roller group is two , Symmetrically arranged on both sides of the grinding disc; a plurality of swinging mechanisms, which are respectively connected to the respective grinding rollers, and each swinging mechanism is used to control the corresponding grinding rollers to swing and grind; Optionally, one of the plurality of grinding roller groups is controlled by a plurality of swinging mechanisms to swing the grinding material, and the other grinding roller groups are not operated.

In a possible design, a base frame is further provided, which is arranged around the grinding disc, and the swing mechanism is arranged on the base frame.

In a possible design, the swing mechanism further includes a swing arm and a swing oil cylinder. The swing oil cylinder is arranged on the chassis, and the swing oil cylinder is connected to the corresponding grinding roller through the swing arm.

In a possible design, the swing mechanism further includes a pin, and the swing arm and the swing oil cylinder are hinged through the pin.

In a possible design, the number of the grinding roller groups is two, and one of the grinding roller groups includes a first grinding roller and a third grinding roller, and the other grinding roller group includes a second grinding roller and a fourth grinding roller, The first grinding roller, the second grinding roller, the third grinding roller, and the fourth grinding roller are evenly spaced around the grinding disc.

In a possible design, the multi-roller cement vertical roller mills which are reserved for each other further include a middle shell, a plurality of bridge plates, and a bearing seat provided on each bridge plate. The middle shell is disposed above the chassis and The cover is arranged on the grinding disc. One end of each grinding roller passes through the middle casing and is located in the middle casing. The other end of each grinding roller is disposed outside the middle casing and connected to the swing arm, and the swing arm is provided on the bearing seat.

In a possible design, the multi-roller cement vertical roller mills which are reserved for each other further include a sealing plate, which is detachably disposed at a position corresponding to each of the rollers passing through the middle casing and connected to each of the rollers, for Seal the middle case.

In a possible design, a ring plate protruding outward is also provided at the top of the middle shell, and the ring plate is used for winding and supporting the pipes of the multi-roller cement vertical roller mill which are reserved for each other.

In a possible design, the ring plate is also provided with a plurality of clamps for fixing the pipes of the multi-roller cement vertical roller mill which are reserved for each other.

In a possible design, the multi-roller cement vertical roller mills that are backed up to each other further include a sealing cover plate, which is arranged on the middle casing and corresponds to the position of each grinding roller.

Compared with the prior art, the present invention has the following advantages:

1. The multi-roller cement vertical roller mill of the present invention is arranged with multiple grinding roller groups on a grinding disc. When one of the grinding roller groups is in operation, the remaining grinding roller groups can be directly repaired or disassembled and cleaned and cleaned.

2. The interval working control method of multiple grinding roller groups of the multi-roller cement vertical roller mill of the present invention which is mutually redundant and cooperates with multiple grinding roller groups, especially the two grinding roller groups are switched to each other and the standby Long overall service life;

3. The mutually-reserved multi-roller cement vertical roller mill has a long maintenance cycle and a long service life, which improves the overall working efficiency of the cement vertical mill, saves time and costs, and can create more efficiency. .

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention is further described by using the accompanying drawings, but the content in the accompanying drawings does not constitute any limitation to the present invention.

FIG. 1 is a schematic structural diagram of a multi-roller cement vertical roller mill that is reserved for each other according to an embodiment of the present invention.

FIG. 2 is a schematic front view of two grinding roller groups according to an embodiment of the present invention.

FIG. 3 is a schematic top view of two grinding roller groups according to an embodiment of the present invention.

detailed description

As shown in FIG. 1, in an embodiment of the present invention, a multi-roller cement vertical roller mill 20 is used for grinding materials. The multi-roller cement vertical roller mill is used for grinding materials. The machine 20 includes a grinding disc 5, a plurality of grinding roller groups 17, a plurality of swinging mechanisms 19, and a hydraulic control device 6, wherein:

The grinding disc 5 is used for placing materials, which is mainly used to provide rigid support for the material, and can enable multiple grinding roller groups 17 to grind the material on the grinding disc 5. In the present invention, there may be no special requirements for the selection of the grinding disc 5, Refer to the conventional selection in the field.

A plurality of grinding roller groups 17 are arranged above the grinding disc 5. The number of grinding rollers of each grinding roller group 17 is two, which are symmetrically arranged on both sides of the grinding disc 5, and the two symmetrical grinding rollers swing and grind the cement material together, while the remaining grinding The roller does not work.

In a preferred embodiment, the number of the grinding roller groups 17 of the present invention may be two, three, or three or more. When the number of the grinding roller groups 17 is three or more, multiple The spaced-apart grinding roller groups 17 are divided into two groups and controlled at the same time, or two adjacent grinding roller groups 17 can be controlled to work together to ensure that the grinding roller groups 17 are available for backup. The cement material obtained by this control method Uniformity is also good.

In a preferred embodiment, please refer to FIG. 3, the number of the grinding roller groups 17 is two, and one of the grinding roller groups 17 includes a first grinding roller 1 and a third grinding roller 3, and the other grinding roller group 17 Including the second grinding roller 2 and the fourth grinding roller 4, the first grinding roller 1, the second grinding roller 2, the third grinding roller 3, and the fourth grinding roller 4 are evenly arranged around the grinding disc 5, and the first grinding roller 1 and the third grinding roller 3 are controlled by the hydraulic control device 6 to swing the grinding cement material together, and the second grinding roller 2 and the fourth grinding roller 4 are also controlled by the hydraulic control device 6 to swing the grinding cement material together. These two control methods Alternately, it can also be controlled individually.

The specific implementation method is to connect the first grinding roller 1 and the third grinding roller 3 to the hydraulic control device 6 through a control valve, and to connect the second grinding roller 2 and the fourth grinding roller 4 to the hydraulic control device 6 through another control valve. These two control valves are connected in parallel to the hydraulic control device 6 for control. This control method can better ensure that two sets of symmetrical grinding rollers work well at the same time, with high work efficiency and uniform cement powder.

When implementing this control method, each grinding roller can also be individually connected to the hydraulic control device 6 using a control valve. Using the hydraulic control device 6 can independently control each grinding roller. One of the benefits of this embodiment is that the grinding Each roller can be individually maintained and controlled during maintenance, but the control is relatively simple. However, this method requires relatively many parts and the system is more complicated. There will be a certain asynchronous grinding phenomenon during control. The obtained cement powder particles The uniformity is relatively poor. At the same time, the first grinding roller and the second grinding roller do not work at the same time, which can ensure that the entire vertical grinding works longer, and maintenance and adjustment are more convenient.

A plurality of swing mechanisms 19 are correspondingly connected to the respective grinding rollers. Each swing mechanism 19 is used to control the corresponding grinding roller to swing and grind. Please refer to FIG. 2. The swing mechanism 19 disclosed in this embodiment further includes a swing arm 11 and a swing cylinder. 7. The swing oil cylinder 7 is arranged on the chassis, and the swing oil cylinder 7 is connected to the corresponding grinding roller through the swing arm 11. The swing mechanism 19 further disclosed in this embodiment further includes a pin shaft 18, and the swing arm 11 and the swing oil cylinder 7 are hinged through the pin shaft 18, but the swing mechanism 19 disclosed in this embodiment is not limited.

The pressing structure of the grinding roller set 17 of the present invention is different from the existing pressing structure. Please refer to FIG. 1. The present invention uses the rodless cavity of the swing cylinder 7 to swing the arm 11 upward, and uses the reaction force of the swing arm 11 to The clinker is further ground on a grinding roller. According to the principle of F (pressure) = P (pressure) x S (area), the larger the pressure and the area, the greater the pressure. The present invention uses the area of a rodless cavity to be larger than the area of a rod cavity. The swing arm 11 transmits torque to pressurize the grinding roller.

In a preferred embodiment, please refer to FIG. 1 and FIG. 2, and further includes a chassis 9. The chassis 9 is disposed around the grinding plate 5, and the swing mechanism 19 is disposed on the chassis 9. The chassis 9 is mainly used for swinging. The mechanism 19 provides rigid support and forms a sealed space with the middle case.

The hydraulic control device 6 is connected to a plurality of swing mechanisms 19, please refer to FIG. 1. The hydraulic control device 6 can selectively control one of the plurality of grinding roller groups 17 to swing and grind through the plurality of swing mechanisms 19. Material, and the remaining grinding roller group 17 is not working. The swing cylinder 7 of each grinding roller disclosed in this embodiment is independently connected to the hydraulic control device 6, and the hydraulic control device 6 controls the grinding roller to oscillate and grind the cement material together with its corresponding grinding roller, while the other grinding rollers do not work.

In a preferred embodiment, please refer to FIG. 1 again. The multi-roller cement vertical roller mill 20 which is reserved for each other further includes a middle casing 10, a plurality of bridge plates 12, and bearings provided on each bridge plate 12. The seat 13 and the middle casing 10 are disposed above the chassis 9 and are disposed on the grinding disc 5. One end of each grinding roller passes through the middle casing 10 and is located in the middle casing 10, and the other end of each grinding roller is disposed on the middle casing 10. The outside is connected to the swing arm 11, and the swing arm 11 is disposed on the bearing seat 13.

In a preferred embodiment, please refer to FIG. 1. The multi-roller cement vertical roller mill 20 which is reserved for each other further includes a sealing plate 8, which is detachably disposed at a position corresponding to each of the rollers passing through the middle casing 10. It is connected with each grinding roller, and the middle casing 10 is provided with a connection hole corresponding to the sealing plate 8. When the sealing plate 8 is placed in the corresponding connection hole, the middle casing 10 is sealed.

In another preferred embodiment, please refer to FIG. 1 again. The multi-roller cement vertical roller mill 20, which is reserved for each other, further includes a sealing cover plate 14, which is disposed on the middle casing 10 and positions with each of the rollers. Correspondingly, when the grinding roller needs to be repaired, the next pair of opposite grinding rollers are disassembled for maintenance, and the removed grinding roller is sealed with a sealing cover plate 14, and the connection of the detachable sealing plate 8 is used directly when blocking. The holes can be used, and the entire implementation process is relatively simple, easy to operate, and does not affect the normal work of the vertical mill.

In a preferred embodiment, please refer to FIG. 1. A ring plate 15 protruding outward is also provided at the top of the middle casing 10. The ring plate 15 is used for a multi-roller cement vertical roller mill 20 which is reserved for each other. The winding and support of the pipe can well arrange the grinding roller pipe, so that the design of the entire vertical mill is simple and takes up less space. In another preferred embodiment, the ring plate 15 is further provided with a plurality of clamps 16 for fixing the pipes 71 of the multi-roller cement vertical roller mill 20 to each other to prevent the pipes 71 from loosening or slipping.

The above description shows and describes several preferred embodiments of the present invention, but as mentioned above, it should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as an exclusion of other embodiments, but can be used for each Other combinations, modifications, and environments, and can be altered within the scope of the inventive concepts described herein through the above teachings or related art or knowledge. Modifications and changes made by those skilled in the art without departing from the spirit and scope of the present invention should all fall within the protection scope of the appended claims of the present invention.

Claims

A multi-roller cement vertical roller mill that is reserved for each other is used for grinding materials. The multi-roller cement vertical roller mill that is used for each other includes:

A grinding disc for placing the material;

A plurality of grinding roller groups are disposed above the grinding disk, and the number of the grinding rollers of each grinding roller group is two, which are symmetrically arranged on both sides of the grinding disk;

A plurality of swinging mechanisms, which are respectively correspondingly connected to each of the grinding rollers, and each of the swinging mechanisms is used to control the corresponding grinding rollers to swing and grind; and

A hydraulic control device is connected to the plurality of swing mechanisms, and the hydraulic control device can selectively control one of the plurality of grinding roller groups to oscillate and grind the rollers through the plurality of swing mechanisms. Material, and the rest of the grinding roller set is not working.
The multi-roller cement vertical roller mill according to claim 1, further comprising a base frame disposed around the grinding disc, and the swing mechanism is disposed on the base frame.
The multi-roller cement vertical roller mill according to claim 2, wherein the swing mechanism further comprises a swing arm and a swing cylinder, the swing cylinder is arranged on the chassis, and the swing The oil cylinder is connected to the corresponding grinding roller through the swing arm.
The multi-roller cement vertical roller mill according to claim 3, wherein the swing mechanism further comprises a pin, and the swing arm and the swing cylinder are hinged through the pin.
The multi-roller cement vertical roller mill according to claim 1, wherein the number of the grinding roller groups is two, and one of the grinding roller groups includes a first grinding roller and a third Grinding roller, the other grinding roller group comprises a second grinding roller and a fourth grinding roller, and the first grinding roller, the second grinding roller, the third grinding roller and the fourth grinding roller are spaced apart Evenly arranged around the grinding disc.
The multi-roller cement vertical roller mill in accordance with claim 3, wherein the multi-roller cement vertical roller mill in standby mode further comprises a middle casing, a plurality of bridge plates, and A bearing seat on the bridge plate, the middle casing is disposed above the chassis and is disposed on the grinding disc, and one end of each of the grinding rollers passes through the middle casing and is located in the middle casing Inside the body, the other end of each of the grinding rollers is disposed on the outside of the middle casing and is connected to the swing arm, and the swing arm is provided on the bearing seat.
The mutually-reserved multi-roller cement vertical roller mill according to claim 6, characterized in that the mutually-reserved multi-roller cement vertical roller mill further comprises a sealing plate detachably disposed between each of the The grinding roller passes through the corresponding position of the middle casing and is connected to each of the grinding rollers for sealing the middle casing.
The multi-roller cement vertical roller mill according to claim 6, wherein a ring plate protruding outward is provided on the top of the middle casing, and the ring plate is used for the The multi-roller cement vertical roller mills which are backed up to each other are wound and supported.
The phase-reserved multi-roller cement vertical mill according to claim 8, wherein the ring plate is further provided with a plurality of clamps for fixing the mutually-reserved multi-roller cement vertical roller mills. The pipeline.
The mutually-reserved multi-roller cement vertical roller mill according to claim 6, wherein the mutually-reserved multi-roller cement vertical roller mill further comprises a sealing cover plate arranged on the middle casing. And corresponds to the position of each of said grinding rollers.