Novel grinding door sealing device

Abstract

The utility model discloses a novel mill door sealing device which comprises a shell connecting sleeve and a rocker arm connecting sleeve which are coaxially sleeved on a rocker arm, the shell connecting sleeve is fixed on a mill shell, the rocker arm connecting sleeve is fixed on the rocker arm, and outer rings of the shell connecting sleeve and the rocker arm connecting sleeve are connected through sealing cloth. A sealing plate is connected between the inner ring and the outer ring of the rocker arm connecting sleeve, an elastic sponge plate is attached to the sealing plate, and an inner hole plate of the shell connecting sleeve extends to the elastic sponge plate and is connected with the end face of the elastic sponge plate in an attached mode. A sealing area is formed among the sealing cloth, the elastic sponge plate and the inner hole plate, and an open area is formed among the elastic sponge plate, the inner hole plate and the rocker arm. Complete sealing can be formed, and materials in the mill cannot be influenced by airflow to enter the sealed space, so that abrasion of the materials to the sealing cloth is avoided, meanwhile, the working efficiency of the mill is improved, the maintenance cost of the mill is saved, and the working environment is protected.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing, in particular to a novel grinding door sealing device. Background Art

[0002] In the cement building materials industry and the metallurgical industry, many materials need to be processed into powder to meet the needs of the next production process. The powder processing mainly adopts the grinding system. The vertical roller mill is the preferred grinding equipment due to its good grinding performance and low energy consumption. At present, in various types of vertical roller mills, the air leakage problem at the grinding roller has been bothering users. The air leakage at the grinding roller will affect the output of the mill and increase the power consumption of the fan. In order to solve the air leakage problem, existing enterprises generally use sealing frames, and the sealing frames are tightly sealed with rubber fibers and other materials around them. The problems with the existing sealing methods are: 1) It is difficult for the rubber fiber cloth and the sealing frame to fit completely, so it is difficult to achieve complete sealing. 2) During the operation of the mill, the grinding roller and the rocker arm fluctuate up and down with the thickness of the material layer. In order not to affect the operation of the rocker arm, the inner hole of the sealing frame on the shell needs to be designed as an ellipse, which leads to a large gap between the rocker arm and the sealing frame. During the mill production process, the material will be carried to the rubber fiber cloth seal by the airflow in the mill and rub against the sealing cloth, which will damage the sealing cloth and cause material and air leakage. It will also lead to frequent mill shutdowns to replace the outer ring seal, wasting manpower, financial resources and material resources. Utility Model Content

[0003] In order to solve the above problems, the utility model provides a novel grinding door sealing device.

[0004] The technical solution adopted by the utility model is:

[0005] A novel grinding door sealing device comprises a shell connecting sleeve and a rocker arm connecting sleeve coaxially sleeved on a rocker arm, the shell connecting sleeve is fixed on a grinding mill shell, the rocker arm connecting sleeve is fixed on a rocker arm, the outer rings of the shell connecting sleeve and the rocker arm connecting sleeve are connected by a sealing cloth, a sealing plate is connected between the inner ring and the outer ring of the rocker arm connecting sleeve, an elastic sponge plate is fitted on the sealing plate, an inner hole plate of the shell connecting sleeve is extended to the elastic sponge plate, and is fitted and connected with the end face of the elastic sponge plate; a sealing area is formed between the sealing cloth, the elastic sponge plate and the inner hole plate, and an open area is formed between the elastic sponge plate, the inner hole plate and the rocker arm.

[0006] Furthermore, the sealing cloth is made of rubber fiber and is in a cylindrical shape, and its two ends are respectively fixed to the shell connecting sleeve and the rocker arm connecting sleeve through clamps.

[0007] Further, the middle portion of the sealing cloth is configured to be wavy.

[0008] Furthermore, the elastic sponge board is a rubber-plastic sponge board with a thickness of 100 to 150 mm.

[0009] Furthermore, the housing connecting sleeve includes an inner hole plate, an outer edge plate and an annular connecting plate. The lower end of the inner hole plate is connected to the lower end of the outer edge plate through the annular connecting plate. The inner circumferential surface of the inner hole plate forms an oval inner hole, which is adapted to the rocker arm and has a minimum diameter greater than the outer diameter of the rocker arm.

[0010] Furthermore, the rocker arm connecting sleeve includes an inner ring plate, an outer ring plate and an annular sealing plate. The lower end of the inner ring plate is connected to the middle part of the outer ring plate through the annular sealing plate. The inner circumferential surface of the inner ring plate forms a circular inner hole, which is adapted to the rocker arm and has a hole diameter equal to the outer diameter of the rocker arm.

[0011] The beneficial effects of the present utility model: In this application, a high-elastic sponge plate with a certain thickness is attached to the sealing plate of the rocker arm connecting sleeve. During the operation of the mill, as the high-elastic rubber and plastic sponge plate vibrates up and down with the rocker arm, it can always be tightly compressed and fitted to the inner hole plate of the housing connecting sleeve. Thus, a completely sealed space is formed among the high-elastic sponge plate, the inner hole plate and the sealing cloth. The materials inside the mill will not be affected by the airflow and enter this sealed space, thereby avoiding the abrasion of the sealing cloth by the materials, improving the working efficiency of the mill, saving the maintenance cost of the mill, and protecting the working environment. Description of the Drawings

[0012] Figure 1 It is a structural diagram of the mill door sealing device of Embodiment 1.

[0013] Figure 2 It is a structural diagram of the housing connecting sleeve and the rocker arm connecting sleeve of Embodiment 1.

[0014] Figure 3 It is a connection structural diagram of the housing connecting sleeve and the rocker arm of Embodiment 1. Detailed Embodiments

[0015] To make the purpose, technical solutions and advantages of the present utility model clearer, the technical solutions of the present utility model will be clearly and completely described below in conjunction with the drawings and a preferred embodiment.

[0016] Embodiment 1

[0017] Referring to Figures 1 - 3 , this embodiment provides a new type of mill door sealing device, which includes a housing connecting sleeve 10 and a rocker arm connecting sleeve 20. The housing connecting sleeve 10 and the rocker arm connecting sleeve 20 are coaxially sleeved on the rocker arm 1. The housing connecting sleeve 10 is fixed to the mill housing 2 by screws, and the rocker arm connecting sleeve 20 is fixed to the rocker arm 1 by screws. An outer sealing cloth 30 is wrapped around the outer circles of the housing connecting sleeve 10 and the rocker arm connecting sleeve 20. The sealing cloth 30 is made of rubber fiber, is in a cylindrical shape as a whole, and is provided with a wavy shape in the middle part. The two ends of the sealing cloth 30 are respectively fixed to the housing connecting sleeve 10 and the rocker arm connecting sleeve 20 by clamps to jointly form an outer sealing.

[0018] The sealing cloth made of rubber fiber is resistant to environmental corrosion and has a wide temperature resistance range; the middle part is arranged in a wavy shape to adapt to the up and down movement of the rocker connecting sleeve 20 along with the rocker.

[0019] The housing connecting sleeve 10 includes an inner hole plate 11, an outer edge plate 12 and an annular connecting plate 13. The lower end of the inner hole plate 11 is connected to the lower end of the outer edge plate 12 through the annular connecting plate 13. An elliptical inner hole is formed on the inner circumferential surface of the inner hole plate 11. The elliptical inner hole is adapted to the rocker 1 and its minimum diameter is larger than the outer diameter of the rocker. The elliptical inner hole is set to not affect the up and down working vibration track of the rocker during the production process of the mill.

[0020] The rocker connecting sleeve 20 includes an inner ring plate 21, an outer ring plate 22 and an annular sealing plate 23. The lower end of the inner ring plate is connected to the middle part of the outer ring plate through the annular sealing plate. A circular inner hole is formed on the inner circumferential surface of the inner ring plate. The circular inner hole is adapted to the rocker and its aperture is equal to the outer diameter of the rocker. A hard seal is formed between the circular inner hole and the rocker. A layer of highly elastic rubber and plastic sponge board 24 with a thickness of 100 - 150 mm is attached to the outer side surface of the annular sealing plate 23. The inner hole plate 11 of the housing connecting sleeve 10 extends to the highly elastic rubber and plastic sponge board, and its end surface is completely and tightly attached to the side surface of the highly elastic rubber and plastic sponge board. Thus, a sealing area 50 is formed between the sealing cloth 30, the elastic sponge board 24 and the inner hole plate 11, and an open area 40 is formed between the elastic sponge board 24, the inner hole plate 11 and the rocker 1. In the open area 40, a small amount of materials in the mill will exist in this area along with the airflow in the mill, but will also be carried back into the mill for re-selection in the rotary airflow formed in this area. The setting of the sealing area 50 can always form a closed space without considering the wear of relative components, preventing the materials, external dust and gas in the open area from entering and impacting the outer seal.

[0021] The compression ratio of the highly elastic rubber and plastic sponge board 24 should be selected according to the maximum amplitude of the rocker up and down during the operation of the mill to ensure that during the operation of the mill, the inner hole plate 11 and the highly elastic rubber and plastic sponge board 24 vibrate up and down along with the rocker but always tightly compress and fit without separation.

[0022] The above is only the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and retouches can be made, and these improvements and retouches are also within the protection scope of the present invention.

Claims

1. A new type of grinding door sealing device, characterized in that: It comprises a shell connecting sleeve and a rocker arm connecting sleeve which are coaxially sleeved on the rocker arm, the shell connecting sleeve is fixed on the mill shell, the rocker arm connecting sleeve is fixed on the rocker arm, the outer rings of the shell connecting sleeve and the rocker arm connecting sleeve are connected by a sealing cloth, a sealing plate is connected between the inner ring and the outer ring of the rocker arm connecting sleeve, an elastic sponge plate is fitted on the sealing plate, the inner hole plate of the shell connecting sleeve is extended to the elastic sponge plate, and is fitted and connected with the end face of the elastic sponge plate; a sealing area is formed between the sealing cloth, the elastic sponge plate and the inner hole plate, and an open area is formed between the elastic sponge plate, the inner hole plate and the rocker arm.

2. A new type of grinding door sealing device according to claim 1, characterized in that: The sealing cloth is made of rubber fiber cloth and is in a cylindrical shape, with both ends being fixed to the shell connecting sleeve and the rocker arm connecting sleeve respectively through clamps.

3. A new type of grinding door sealing device according to claim 1, characterized in that: The middle portion of the sealing cloth is arranged in a wave shape.

4. A new type of grinding door sealing device according to claim 1, characterized in that: The elastic sponge board is a rubber-plastic sponge board with a thickness of 100 to 150 mm.

5. A new type of grinding door sealing device according to claim 1, characterized in that: The shell connecting sleeve includes an inner hole plate, an outer edge plate and an annular connecting plate. The lower end of the inner hole plate is connected to the lower end of the outer edge plate through the annular connecting plate. The inner circumferential surface of the inner hole plate forms an elliptical inner hole. The elliptical inner hole is adapted to the rocker arm and its minimum diameter is larger than the outer diameter of the rocker arm.

6. A novel grinding door sealing device according to claim 1, characterized in that: The rocker arm connecting sleeve includes an inner ring plate, an outer ring plate and an annular sealing plate. The lower end of the inner ring plate is connected to the middle part of the outer ring plate through the annular sealing plate. The inner circumferential surface of the inner ring plate forms a circular inner hole. The circular inner hole is adapted to the rocker arm and its aperture is equal to the outer diameter of the rocker arm.

Images