A sealing device for a drag chain conveyor
By installing a bowl-shaped steel wire sealing brush and auxiliary sealing components at the upper support shaft of the chain grate machine, the air leakage problem caused by the gap between the upper support shaft and the baffle of the chain grate machine was solved, achieving better sealing performance and energy saving.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ANGANG STEEL GRP GONGCHANGLING MINING CO SUBSIDIARY COM
- Filing Date
- 2025-06-09
- Publication Date
- 2026-06-12
AI Technical Summary
The gap between the upper support shaft of the chain grate machine and the baffle of the chain grate machine results in poor sealing, high air leakage rate, which affects heat utilization and increases energy consumption, while also causing dust to overflow.
It adopts a bowl-shaped steel wire sealing brush and auxiliary sealing components, including a steel retaining ring, a grooved sealing ring and a cylindrical sleeve, to achieve multi-layer sealing by tightly adhering to the upper support shaft and clamping plate structure, thereby reducing air leakage.
It effectively improved the sealing effect, reduced air leakage, stabilized the production process, reduced energy consumption and dust overflow, and protected the on-site environment.
Smart Images
Figure CN224352391U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of sealing technology for chain grate machines, and particularly to a sealing device for the upper support shaft of a chain grate machine. Background Technology
[0002] In the production process of the rotary kiln using a chain grate for pelletizing ore, the upper support shaft is fixed on both sides with tile seats. After the chain grate is started, the upper support shaft rotates. Since the ash boxes of the chain grate are distributed into four sections: drying section, exhaust section, preheating section 1, and preheating section 2, the drying section has two ash boxes, each with 4 upper support shafts installed. There are a total of 16 air leakage points on both sides. The drying section is where air is blown at the air leakage points. The exhaust section (5 ash boxes), preheating section 1 (4 ash boxes), and preheating section 2 (6 ash boxes) have 15*4*2=120 air leakage points. One ash box has 2 upper support shafts installed. Therefore, the exhaust section, preheating section 1, and preheating section 2 have a total of 120-4=116 air leakage points. The exhaust section, preheating section 1, and preheating section 2 have air suction at the air leakage points, for a total of 116+16=132 air leakage points. The air leakage rate is serious.
[0003] Currently, the upper support shaft and the baffle of the chain grate machine are usually sealed by clamps. However, there are gaps between the clamps and the upper support shaft, making a good seal impossible and resulting in poor sealing and unavoidable air leakage. The quality of the upper support shaft seal directly affects heat utilization. High air leakage leads to the intake of large amounts of cold air, which not only affects the drying and preheating of green balls on the chain grate machine but also increases coal and electricity consumption and causes dust to overflow. Utility Model Content
[0004] The purpose of this invention is to address the shortcomings of existing technologies and provide a simple and effective sealing device for the upper support shaft of a chain grate machine.
[0005] To achieve the above objectives, the present invention adopts the following technical solution:
[0006] A sealing device for the upper support shaft of a chain grate machine includes an upper support shaft, a support bearing seat for supporting the shaft end, a chain grate machine baffle, and a clamping plate disposed on the outer side of the chain grate machine baffle. The device is characterized by comprising a cup-shaped steel wire sealing brush and an auxiliary sealing assembly. The clamping plate is composed of a rectangular steel plate with a shaft hole and a circular outer ring. The cup-shaped steel wire sealing brush consists of a steel cup sleeve and a steel wire brush connected to the steel cup sleeve. The steel cup sleeve is fitted onto the upper support shaft near the clamping plate, and the inner side of the steel wire brush is tightly fitted against the circular outer ring. The auxiliary sealing assembly consists of a steel retaining ring. It consists of a grooved sealing ring and a cylindrical sleeve. The right end of the steel retaining ring is fixedly installed on the upper support shaft away from the bearing seat, and the left end is set close to the steel cup sleeve. There is one or more inner grooves on the inner side of one end of the cylindrical outer sleeve. The cylindrical outer sleeve is fitted on the outside of the cup-shaped steel wire sealing brush and the steel retaining ring. The grooved side of the grooved sealing ring is fitted on the steel retaining ring. The outer side of the grooved sealing ring is embedded in the inner groove of the cylindrical sleeve and is fixedly connected to the inner groove. The other end of the cylindrical sleeve is welded to the rectangular steel plate of the chain grate clamp.
[0007] Preferably, the steel retaining ring is at least one steel retaining ring.
[0008] Preferably, the inner grooved sealing ring is made of either high-temperature resistant rubber or iron.
[0009] This utility model has the following beneficial effects:
[0010] The sealing device for the upper support shaft of the chain grate machine of this utility model has a simple structure, is easy to install and maintain, effectively improves the air leakage situation on site, protects the site environment, reduces system heat loss, stabilizes the operation of the production process, and saves energy and reduces consumption. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the structure of the bowl-shaped steel wire sealing brush and the steel retaining ring installed on the upper support shaft of the chain grate machine according to this utility model;
[0012] Figure 2 This is a schematic diagram of the structure of the present invention, in which a sealing sleeve with an inner groove is fitted onto two steel retaining rings;
[0013] Figure 3 This is a schematic diagram of a sealing sleeve with a groove.
[0014] Figure 4 This is a schematic diagram of the structure of the present invention with a cylindrical outer sleeve.
[0015] Figure 5 This is a schematic diagram of the clamping plate.
[0016] Figure 6 This is a cross-sectional view of a cylindrical outer sleeve. Detailed Implementation
[0017] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the disclosure of the utility model more thorough and comprehensive.
[0018] like Figures 1-6 As shown, a sealing device for the upper support shaft of a chain grate machine includes an upper support shaft 4, a support shaft bearing seat 6 for supporting the shaft end of the upper support shaft 4, a chain grate machine baffle 1, and a clamping plate 2 disposed on the outside of the chain grate machine baffle 1. The device is characterized by including a cup-shaped steel wire sealing brush and an auxiliary sealing assembly. The clamping plate 2 is composed of a rectangular steel plate 21 with a shaft hole and a circular outer ring 22. The cup-shaped steel wire sealing brush is composed of a steel cup sleeve 32 and a steel wire brush 31 connected to the steel cup sleeve 32. The steel cup sleeve 32 is fitted onto the upper support shaft near the clamping plate side. 4. The inner side of the wire brush 31 is set close to the outer circular ring 22. The auxiliary sealing component consists of a steel retaining ring 51, a grooved sealing ring 52, and a cylindrical sleeve 53. The right end of the steel retaining ring 51 is fixedly installed on the upper support shaft 4 away from the bearing seat 6, and the left end is set close to the steel cup sleeve 32. In this embodiment, there are two steel retaining rings 51, which makes the sealing effect better. The steel cup sleeve 31 rotates together with the upper support shaft 4. The cup-shaped wire brush has the functions of high temperature resistance, wear resistance, wind protection and dust protection, and avoids air leakage.
[0019] In this invention, one or more inner grooves 71 are provided on the inner side of one end of the cylindrical outer sleeve 7. The cylindrical outer sleeve 7 is fitted onto the outside of the cup-shaped steel wire sealing brush and the steel retaining ring 51. The grooved side of the grooved sealing ring 52 is fitted onto the steel retaining ring 51. The outer side of the grooved sealing ring 52 is embedded in the inner groove 71 of the cylindrical sleeve and is fixedly connected to the inner groove 71. The other end of the cylindrical sleeve 7 is welded to the rectangular steel plate 21 of the clamping plate, which plays a secondary sealing role.
[0020] Furthermore, the grooved sealing ring described in the embodiment is made of either high-temperature resistant rubber or steel. Using a rubber grooved sealing ring makes replacement easier; a steel sealing ring has a longer service life.
[0021] It should be noted that in the description of this utility model, the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
Claims
1. A sealing device for the upper support shaft of a chain grate machine, comprising an upper support shaft, a support bearing seat for supporting the shaft end of the upper support shaft, a chain grate machine baffle, and a clamping plate disposed on the outside of the chain grate machine baffle, characterized in that: The system includes a bowl-shaped wire sealing brush and an auxiliary sealing assembly. The clamping plate consists of a rectangular steel plate with a shaft hole and a circular outer ring. The bowl-shaped wire sealing brush consists of a steel cup sleeve and a wire brush connected to the steel cup sleeve. The steel cup sleeve is fitted onto the upper support shaft near the clamping plate, and the inner side of the wire brush is tightly fitted against the circular outer ring. The auxiliary sealing assembly consists of a steel retaining ring, a grooved sealing ring, and a cylindrical sleeve. The right end of the steel retaining ring is fixedly installed on the upper support shaft away from the support shaft bearing seat, and the left end is set near the steel cup sleeve. One or more inner grooves are provided on the inner side of one end of the cylindrical outer sleeve. The cylindrical outer sleeve is fitted onto the outside of the bowl-shaped wire sealing brush and the steel retaining ring. The grooved side of the grooved sealing ring is fitted onto the steel retaining ring. The outer side of the grooved sealing ring is embedded in the inner groove of the cylindrical sleeve and is fixedly connected to the inner groove. The other end of the cylindrical sleeve is welded to the rectangular steel plate of the chain grate clamping plate.
2. The sealing device for the upper support shaft of the chain grate machine according to claim 1, characterized in that: The steel retaining ring is at least one steel retaining ring.
3. The sealing device for the upper support shaft of the chain grate machine according to claim 1, characterized in that: The inner grooved sealing ring is made of high-temperature resistant rubber.