Powder conveying screw shaft end sealing device

Abstract

The utility model discloses a powder conveying screw shaft end sealing device which comprises an auger end shaft, a sealing bearing is arranged in the middle of the auger end shaft in a sleeved mode, a fixing disc is arranged on one side of the sealing bearing, a positioning groove is formed in the side, close to the fixing disc, of the sealing bearing, and an air inlet pipe is fixedly connected to the outer side of the sealing bearing. A first side sealing ring is embedded in the connecting position of one side of the inner wall of the sealing bearing and the auger end shaft, a second side sealing ring is embedded in the connecting position of the other side of the inner wall of the sealing bearing and the auger end shaft, an inner cavity is formed in the sealing bearing, a U-shaped inflation sealing ring is installed in the inner cavity, and an inflation cavity is formed in the middle of the U-shaped inflation sealing ring. According to the powder conveying screw shaft end sealing device, the whole laying device is stable and reliable to use, the collision phenomenon of pipelines in the laying process is reduced, and damage to the pipelines is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of powder processing, concretely to a powder conveying spiral shaft end sealing device. BACKGROUND

[0002] In the field of powder conveying, the spiral conveyor is a commonly used equipment, which conveys powder from one end to the other end through the rotation of the spiral shaft. The existing spiral shaft end sealing device has many defects, and the traditional packing sealing method is adopted. Due to the characteristics of fine particles of powder, the packing is easy to be worn by powder, which leads to the decline of sealing performance and serious powder leakage, resulting in not only material waste but also pollution of the working environment. SUMMARY

[0003] The utility model discloses a powder conveying spiral shaft end sealing device to solve the problems in the background art.

[0004] To achieve the above object, the utility model provides the following technical scheme: a powder conveying spiral shaft end sealing device, including auger end shaft, the middle part of auger end shaft is equipped with sealing bearing, one side of sealing bearing is equipped with fixed disc, the side of sealing bearing close to fixed disc is equipped with positioning groove, the outside of sealing bearing is fixedly connected with inlet pipe, the connecting place of one side of sealing bearing inner wall and auger end shaft is embedded with first side sealing ring, the connecting place of the other side of sealing bearing inner wall and auger end shaft is embedded with second side sealing ring, the inside of sealing bearing is equipped with inner chamber, the inside of inner chamber is installed with U type inflation sealing ring, the middle part of U type inflation sealing ring is equipped with inflation cavity, the middle part of inlet pipe is equipped with air channel that extends to the inside of inflation cavity.

[0005] Preferably, the sealing bearing is matched with the fixed disc, the surface of the sealing bearing is provided with a plurality of limiting bolts, and the fixed disc is connected with the fixed disc through the limiting bolts.

[0006] Preferably, the surface of the fixed disc is provided with a plurality of fixed screw holes for fixing the fixed disc, and the plurality of fixed screw holes are equidistantly distributed.

[0007] Preferably, the inner wall of the first side sealing ring and the inner wall of the second side sealing ring are in contact with the surface of the auger end shaft.

[0008] Preferably, the inner side of the U-shaped inflation sealing ring is in contact with the surface of the auger end shaft, and the diameter of the auger end shaft is matched with the diameter of the inner wall of the sealing bearing.

[0009] Compared with the prior art, the utility model has the beneficial effects that:

[0010] The auger end shaft is connected to the conveyor housing via a sealed bearing. The sealed bearing seals the connection between the auger end shaft and the housing. The inner wall of the sealed bearing is equipped with a first side sealing ring and a second side sealing ring for double sealing. In addition, a U-shaped inflatable sealing ring is installed inside the sealed bearing. Through the air inlet pipe, the air chamber inside the U-shaped inflatable sealing ring can be inflated. The inflation causes the U-shaped inflatable sealing ring to expand and press against the auger end shaft, further sealing the end. The entire sealing device has a good sealing effect on the auger shaft, greatly reducing material leakage. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model;

[0012] Figure 2 This is a structural diagram of one side of the sealed bearing of this utility model;

[0013] Figure 3 This is a structural diagram of the other side of the sealed bearing of this utility model;

[0014] Figure 4 This is a cross-sectional view of the connection between the auger end shaft and the sealed bearing of this utility model.

[0015] In the diagram: 1. Screwdriver end shaft; 2. Sealed bearing; 3. Fixed plate; 4. Positioning groove; 5. First side sealing ring; 6. Air inlet pipe; 7. Fixing screw hole; 8. Limiting bolt; 9. Inner cavity; 10. U-shaped inflation sealing ring; 11. Inflation chamber; 12. Air passage; 13. Second side sealing ring. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figures 1-4This utility model provides a sealing device for the end of a powder conveying screw shaft, including a screw conveyor shaft 1, a sealing bearing 2 sleeved in the middle of the screw conveyor shaft 1, a fixed plate 3 on one side of the sealing bearing 2, a positioning groove 4 on the side of the sealing bearing 2 near the fixed plate 3, an air inlet pipe 6 fixedly connected to the outer side of the sealing bearing 2, a first side sealing ring 5 embedded at the connection between one side of the inner wall of the sealing bearing 2 and the screw conveyor shaft 1, a second side sealing ring 13 embedded at the connection between the other side of the inner wall of the sealing bearing 2 and the screw conveyor shaft 1, an inner cavity 9 inside the sealing bearing 2, a U-shaped inflatable sealing ring 10 installed inside the inner cavity 9, an inflation chamber 11 in the middle of the U-shaped inflatable sealing ring 10, and an air passage 12 extending into the inflation chamber 11 in the middle of the air inlet pipe 6.

[0018] In this embodiment, the auger end shaft 1 is connected to the conveyor housing through a sealed bearing 2. The sealed bearing 2 seals the connection between the auger end shaft 1 and the housing. The inner wall of the sealed bearing 2 is provided with a first side sealing ring 5 and a second side sealing ring 13 for double sealing. The sealed bearing 2 is provided with a U-shaped inflatable sealing ring 10 inside, and the air inlet pipe 6 can inflate the air chamber 11 inside the U-shaped inflatable sealing ring 10. The inflation can cause the U-shaped inflatable sealing ring 10 to expand and press against the auger end shaft 1, further sealing the end.

[0019] See Figures 1-4 The sealed bearing 2 is matched with the fixed plate 3. The surface of the sealed bearing 2 is provided with several limiting bolts 8. The fixed plate 3 is connected to the fixed plate 3 through the limiting bolts 8. The surface of the fixed plate 3 is provided with several fixing screw holes 7 for easy fixing of the fixed plate 3. The several fixing screw holes 7 are evenly distributed. The inner wall of the first side sealing ring 5 and the inner wall of the second side sealing ring 13 are in contact with the surface of the auger end shaft 1. The inner side of the U-shaped inflatable sealing ring 10 is in contact with the surface of the auger end shaft 1. The diameter of the auger end shaft 1 matches the diameter of the inner wall of the sealed bearing 2.

[0020] In practical use, this utility model provides a sealing device for the end of a powder conveying screw shaft. A sealing bearing 2 seals the screw shaft 1 at the end of the screw shaft. A positioning groove 4 facilitates connection with the housing. The screw shaft 1 is the end position of the auger of the powder conveying screw shaft. The screw shaft 1 is connected to the conveyor housing through the sealing bearing 2. The sealing bearing 2 seals the connection between the screw shaft 1 and the housing. A first side sealing ring 5 and a second side sealing ring 13 are provided on both sides of the inner wall of the sealing bearing 2 for double sealing. A U-shaped inflatable sealing ring 10 is provided inside the sealing bearing 2. The air inlet pipe 6 can inflate the air chamber 11 inside the U-shaped inflatable sealing ring 10. Inflation causes the U-shaped inflatable sealing ring 10 to expand and press against the screw shaft 1, further sealing the end. The entire sealing device has a good sealing effect on the screw shaft, greatly reducing material leakage.

[0021] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A sealing device for the end of a screw conveyor for powder conveying, comprising a screw conveyor end shaft (1), characterized in that: A sealed bearing (2) is fitted in the middle of the auger end shaft (1). A fixed plate (3) is provided on one side of the sealed bearing (2). A positioning groove (4) is provided on the side of the sealed bearing (2) near the fixed plate (3). An air inlet pipe (6) is fixedly connected to the outside of the sealed bearing (2). A first side sealing ring (5) is embedded at the connection between the inner wall of the sealed bearing (2) and the auger end shaft (1). A second side sealing ring (13) is embedded at the connection between the inner wall of the sealed bearing (2) and the auger end shaft (1). An inner cavity (9) is provided inside the sealed bearing (2). A U-shaped inflatable sealing ring (10) is installed inside the inner cavity (9). An inflation chamber (11) is provided in the middle of the U-shaped inflatable sealing ring (10). An air passage (12) extending into the inflation chamber (11) is provided in the middle of the air inlet pipe (6).

2. The sealing device for the end of a powder conveying screw shaft according to claim 1, characterized in that: The sealed bearing (2) is matched with the fixed disk (3). The surface of the sealed bearing (2) is provided with several limiting bolts (8). The fixed disk (3) is connected to the fixed disk (3) through the limiting bolts (8).

3. The sealing device for the end of a powder conveying screw shaft according to claim 1, characterized in that: The surface of the fixed plate (3) is provided with a number of fixing screw holes (7) to facilitate fixing the fixed plate (3), and the number of fixing screw holes (7) are evenly distributed.

4. The sealing device for the end of a powder conveying screw shaft according to claim 1, characterized in that: The inner wall of the first side sealing ring (5) and the inner wall of the second side sealing ring (13) are in contact with the surface of the auger end shaft (1).

5. The sealing device for the end of a powder conveying screw shaft according to claim 1, characterized in that: The inner side of the U-shaped inflatable sealing ring (10) is in contact with the surface of the auger end shaft (1), and the diameter of the auger end shaft (1) matches the diameter of the inner wall of the sealing bearing (2).

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