Flexible seal for lower frame body of coal mill

Abstract

The utility model provides a flexible seal for a lower frame body of a coal mill, which relates to the technical field of coal mills and comprises a flexible seal assembly, a rotating disc is mounted in the flexible seal assembly, a limiting assembly is arranged on the outer side of the rotating disc, and the limiting assembly is arranged at the top of the flexible seal assembly. The flexible sealing assembly comprises a flexible sealing ring, and a wear-resistant layer is installed on the outer side of the flexible sealing ring. When the coal mill drives the flexible sealing assembly to vibrate, the corrugated section is favorable for providing a certain moving space for the flexible sealing assembly, so that the situation that the sealing assembly is damaged due to rigid extrusion is avoided, the flexible sealing assembly is kept to be tightly attached to the edge of equipment, and the service life of the flexible sealing assembly is prolonged. The pulverized coal is prevented from leaking from a gap between the equipment and the flexible sealing assembly, sealing failure caused by dynamic change generated by operation of the equipment is effectively avoided, and it is guaranteed that the flexible sealing assembly keeps good sealing performance all the time.

Description

Technical Field

[0001] This utility model relates to the field of coal mill technology, and in particular to a flexible seal for the lower frame of a coal mill. Background Technology

[0002] A coal mill is a machine that crushes and grinds coal into pulverized coal, and it is an important auxiliary equipment for pulverized coal boilers. According to its working method, there are vertical mills, high-pressure suspension roller mills, medium-speed micro-powder mills, high-pressure trapezoidal mills, Raymond mills, and other models. The rotational speed of the working parts of a coal mill can be divided into three types: low-speed, medium-speed, and high-speed. Because the coal mill contains pulverized coal, hot air, and other media, and because the components move and vibrate during operation, if the lower frame is not properly sealed, pulverized coal will leak into the environment. This not only wastes pulverized coal but also pollutes the environment. Furthermore, hot air leakage will affect the working efficiency and energy utilization of the coal mill.

[0003] During use, the existing lower frame sealing assembly is subject to vibration due to the operation of the coal mill, which in turn causes the sealing assembly to vibrate. However, the existing sealing assembly is not easy to adapt to the displacement and vibration between components through its own deformation, which easily creates gaps on the sealing surface and results in insufficient sealing performance. Utility Model Content

[0004] The purpose of this invention is to solve the problem that existing sealing components are not easy to adapt to the displacement and vibration between components through their own deformation, which easily creates gaps on the sealing surface and thus causes insufficient sealing performance. Therefore, this invention proposes a flexible seal for the lower frame of a coal mill.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a flexible seal for the lower frame of a coal mill, comprising a flexible sealing assembly, wherein a rotating disk is installed inside the flexible sealing assembly, a limiting component is provided on the outer side of the rotating disk, the limiting component is located on the top of the flexible sealing assembly, the flexible sealing assembly includes a flexible sealing ring, a wear-resistant layer is installed on the outer side of the flexible sealing ring, an anti-corrosion layer is installed on the outer side of the wear-resistant layer, corrugated sections are distributed in the middle of the anti-corrosion layer, fastening rings are symmetrically installed on the outer wall of the anti-corrosion layer, and limiting rings are clamped at both ends of the fastening rings.

[0006] Preferably, the limiting component includes a first pressure ring, a second pressure ring is installed at the bottom of the first pressure ring, and a plurality of limiting rods pass through the interior of the first and second pressure rings.

[0007] Preferably, a first sealing ring is installed on the upper surface of the flexible sealing ring, and a second sealing ring is installed on the lower surface of the flexible sealing ring.

[0008] Preferably, the flexible sealing ring is sleeved on the outer wall of the rotating disk, and the first pressure ring and the second pressure ring are sleeved on the outer wall of the rotating disk.

[0009] Preferably, the thickness of the anti-corrosion layer is 5mm-10mm.

[0010] Preferably, the thickness of the wear-resistant layer is 10mm-15mm.

[0011] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0012] 1. In this utility model, when the coal mill drives the flexible sealing component to vibrate, the corrugated section helps to provide a certain amount of movement space for the flexible sealing component, avoiding damage to the sealing component caused by hard compression, maintaining a tight fit between the flexible sealing component and the edge of the equipment, preventing coal powder from leaking from the gap between the equipment and the flexible sealing component, effectively avoiding sealing failure caused by dynamic changes in equipment operation, ensuring that the flexible sealing component always maintains good sealing performance, and at the same time avoiding excessive local wear of the flexible sealing component, ensuring the effectiveness of the sealing of the flexible sealing component. By using a fastening ring clamp on the outside of the flexible sealing component, it is beneficial to limit the movement of the flexible sealing component and ensure the stability of the flexible sealing component.

[0013] 2. In this utility model, by sleeved the first pressure ring and the second pressure ring on the outside of the rotating disk, the bottom of the second pressure ring is connected to the top of the flexible sealing assembly. Then, the second pressure ring and the second pressure ring are limited by a limiting rod, which is beneficial to limit the position of the flexible sealing assembly, facilitates the fixing of the position of the flexible sealing assembly, avoids vertical displacement caused by vibration, thereby ensuring the sealing accuracy and stability of the flexible sealing assembly, and at the same time reduces the vertical displacement of the flexible sealing assembly, thereby extending the service life of the flexible sealing assembly. Attached Figure Description

[0014] Figure 1 A three-dimensional structural diagram of a flexible seal for the lower frame of a coal mill is provided for this utility model.

[0015] Figure 2 This utility model presents a schematic diagram of another angle of the flexible seal for the lower frame of a coal mill.

[0016] Figure 3 This utility model provides an exploded structural diagram of a pressure ring assembly for a flexible seal on the lower frame of a coal mill.

[0017] Figure 4 This utility model presents a partially exploded structural diagram of a flexible seal for the lower frame of a coal mill;

[0018] Figure 5This utility model presents a partial structural diagram of a flexible seal for the lower frame of a coal mill.

[0019] Legend: 1. Flexible sealing assembly; 101. Flexible sealing ring; 102. Wear-resistant layer; 103. Anti-corrosion layer; 104. First sealing ring; 105. Second sealing ring; 106. Corrugated section; 107. Fastening ring; 108. Limiting ring; 2. Limiting assembly; 201. First pressure ring; 202. Second pressure ring; 203. Limiting rod; 3. Rotating disk. Detailed Implementation

[0020] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described below with reference to the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.

[0021] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0022] Example 1: Figure 1-Figure 5 As shown, this utility model provides a technical solution: a flexible seal for the lower frame of a coal mill, including a flexible sealing component 1, a rotating disk 3 installed inside the flexible sealing component 1, a limiting component 2 provided on the outer side of the rotating disk 3, the limiting component 2 being located on the top of the flexible sealing component 1, the flexible sealing component 1 including a flexible sealing ring 101, a wear-resistant layer 102 installed on the outer side of the flexible sealing ring 101, an anti-corrosion layer 103 installed on the outer side of the wear-resistant layer 102, corrugated sections 106 distributed in the middle of the anti-corrosion layer 103, fastening rings 107 symmetrically installed on the outer wall of the anti-corrosion layer 103, limiting rings 108 clamped at both ends of the fastening rings 107, a first sealing ring 104 installed on the upper surface of the flexible sealing ring 101, and a second sealing ring 105 installed on the lower surface of the flexible sealing ring 101.

[0023] In this embodiment, the flexible sealing component 1 is fitted onto the outer wall of the rotating disk 3, and then moved to the desired position to provide a sealing effect. The flexible sealing ring 101 fits against the outer wall of the rotating disk 3, which helps to provide good sealing performance. The polyurethane coating sprayed on the outside of the wear-resistant layer 102 helps to increase the strength of the flexible sealing component 1 and improve its wear resistance. The polytetrafluoroethylene coating sprayed on the outside of the anti-corrosion layer 103 helps to protect the flexible sealing component 1 and effectively provide anti-corrosion, thereby extending the service life of the flexible sealing component 1. The corrugated section 106 is set on the outside of the anti-corrosion layer 103. When the coal mill drives the flexible sealing component 1 to vibrate, the corrugated section 106 helps to provide a seal for the flexible sealing component 1. Providing sufficient space for movement avoids damage to the sealing components caused by rigid compression, maintains a tight fit between the flexible sealing component 1 and the edge of the equipment, prevents coal powder from leaking from the gap between the equipment and the flexible sealing component 1, effectively avoids sealing failure caused by dynamic changes during equipment operation, ensures that the flexible sealing component 1 always maintains good sealing performance, and avoids excessive local wear of the flexible sealing component 1, ensuring the effectiveness of the sealing of the flexible sealing component 1. By using the fastening ring 107 to clamp on the outside of the flexible sealing component 1, it is beneficial to limit the position of the flexible sealing component 1 and ensure the stability of the flexible sealing component 1. The limiting ring 108 facilitates the limiting of the fastening ring 107. The first sealing ring 104 and the second sealing ring 105 fit against the outer wall of the rotating disk 3, further providing an effective sealing effect.

[0024] Example 2: As Figure 1-Figure 5 As shown, the limiting component 2 includes a first pressure ring 201, a second pressure ring 202 installed at the bottom of the first pressure ring 201, and multiple limiting rods 203 passing through the interior of the first pressure ring 201 and the second pressure ring 202. A flexible sealing ring 101 is sleeved on the outer wall of the rotating disk 3. The first pressure ring 201 and the second pressure ring 202 are sleeved on the outer wall of the rotating disk 3. The thickness of the anti-corrosion layer 103 is 5mm-10mm, and the thickness of the wear-resistant layer 102 is 10mm-15mm.

[0025] In this embodiment, by sleeved the first pressure ring 201 and the second pressure ring 202 on the outside of the rotating disk 3, the bottom of the second pressure ring 202 is connected to the top of the flexible sealing assembly 1. Then, the limiting rod 203 is used to limit the second pressure ring 202 and the second pressure ring 202, which is beneficial to limit the position of the flexible sealing assembly 1, making it easier to fix the position of the flexible sealing assembly 1, avoiding vertical displacement caused by vibration, thereby ensuring the accuracy and stability of the sealing of the flexible sealing assembly 1, while reducing the vertical displacement of the flexible sealing assembly 1, and thus extending the service life of the flexible sealing assembly 1.

[0026] The working principle of this embodiment is as follows: In use, the flexible sealing component 1 is first fitted onto the outer wall of the rotating disk 3. Then, the flexible sealing component 1 is moved to the desired position to provide a sealing effect. The flexible sealing ring 101 fits against the outer wall of the rotating disk 3, which helps to provide good sealing performance. The polyurethane coating sprayed on the outside of the wear-resistant layer 102 helps to increase the strength of the flexible sealing component 1. The polytetrafluoroethylene coating sprayed on the outside of the anti-corrosion layer 103 helps to protect the flexible sealing component 1 and effectively provide anti-corrosion effect. The corrugated section 106 helps to provide a certain amount of movement space for the flexible sealing component 1. To avoid damage to the sealing component caused by hard compression, the flexible sealing component 1 is kept in close contact with the edge of the equipment. Then, a fastening ring 107 is used to clamp the outside of the flexible sealing component 1, which helps to limit the position of the flexible sealing component 1. After the flexible sealing component 1 is installed, the first pressure ring 201 and the second pressure ring 202 are sleeved on the outside of the rotating disk 3, so that the bottom of the second pressure ring 202 is connected to the top of the flexible sealing component 1. Then, the limiting rod 203 is used to limit the position of the second pressure ring 202 and the second pressure ring 202, which helps to limit the position of the flexible sealing component 1 and facilitates fixing the position of the flexible sealing component 1.

[0027] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A flexible seal for the lower frame of a coal mill, comprising a flexible sealing assembly (1), characterized in that: The flexible sealing assembly (1) has a rotating disk (3) installed inside. A limiting component (2) is provided on the outside of the rotating disk (3). The limiting component (2) is located on the top of the flexible sealing assembly (1). The flexible sealing assembly (1) includes a flexible sealing ring (101). A wear-resistant layer (102) is installed on the outside of the flexible sealing ring (101). An anti-corrosion layer (103) is installed on the outside of the wear-resistant layer (102). A corrugated section (106) is distributed in the middle of the anti-corrosion layer (103). Fastening rings (107) are symmetrically installed on the outer wall of the anti-corrosion layer (103). Limiting rings (108) are clamped at both ends of the fastening rings (107).

2. The flexible seal for the lower frame of a coal mill according to claim 1, characterized in that: The limiting component (2) includes a first pressure ring (201), a second pressure ring (202) is installed at the bottom of the first pressure ring (201), and multiple limiting rods (203) pass through the interior of the first pressure ring (201) and the second pressure ring (202).

3. The flexible seal for the lower frame of a coal mill according to claim 1, characterized in that: The upper surface of the flexible sealing ring (101) is equipped with a first sealing ring (104), and the lower surface of the flexible sealing ring (101) is equipped with a second sealing ring (105).

4. The flexible seal for the lower frame of a coal mill according to claim 2, characterized in that: The flexible sealing ring (101) is sleeved on the outer wall of the rotating disk (3), and the first pressure ring (201) and the second pressure ring (202) are sleeved on the outer wall of the rotating disk (3).

5. The flexible seal for the lower frame of a coal mill according to claim 1, characterized in that: The thickness of the anti-corrosion layer (103) is 5mm-10mm.

6. The flexible seal for the lower frame of a coal mill according to claim 1, characterized in that: The thickness of the wear-resistant layer (102) is 10mm-15mm.

Images