A multi-stage sealed screw conveyor applicable to materials in a high-requirement sealed environment

Abstract

The present invention relates to the technical field of screw conveyors, and particularly relates to a multi-stage sealed screw conveyor suitable for materials in a high-requirement sealed environment, including a housing. A screw shaft is arranged in the housing. One end of the screw shaft penetrates out of the housing. A shaft flange sleeve is arranged at one end of the housing. A bearing seat body is arranged in the shaft flange sleeve. Both the shaft flange sleeve and the bearing seat body are sleeved outside the screw shaft. A bearing gland is hermetically connected to the top end of the bearing seat body. A packing seal cover, packing seal packing and roller bearings are arranged in the bearing seat body. A spherical bearing is arranged at the end of the housing. A packing seal ring is arranged at the connection between the packing seal cover and the screw shaft. The present invention forms a multi-stage sealing structure through the cooperation of various sealing methods such as mechanical seal, packing seal, flange seal and bearing seat seal. The various seals assist and complement each other to provide high sealing conditions for the screw conveyor and ensure the normal transportation of materials with high sealing and low leakage requirements.

Description

Technical Field

[0001] The present invention relates to the technical field of screw conveyors, and particularly to a multi-stage sealed screw conveyor suitable for materials in a high-requirement sealed environment. Background Art

[0002] A screw conveyor is a machine that uses a motor to drive a screw to rotate and push materials to achieve the purpose of conveying. It can convey materials horizontally, obliquely or vertically, and has the advantages of simple structure, small cross-sectional area, good sealing performance, convenient operation, easy maintenance, and convenient for enclosed transportation.

[0003] In the prior art, the screw conveyor generally realizes the simple sealing of the screw conveyor by installing a pedestal bearing to fix the screw bearing or filling packing. The utility model patents with publication numbers CN208560654U and CN211544932U disclose the above types of sealing methods. However, due to the low sealing performance of the above sealing methods, when conveying materials with high sealing and isolation requirements such as easily infected, toxic, flammable, and explosive materials, there is a risk of material leakage, which poses great harm to personnel and the environment. Summary of the Invention

[0004] In order to solve the problem of low sealing performance of the screw conveyor in the prior art, the present invention provides a multi-stage sealed screw conveyor suitable for materials in a high-requirement sealed environment. The screw conveyor improves the sealing performance through multi-stage sealing to ensure the normal transportation of materials with high sealing and low leakage requirements.

[0005] In order to achieve the above object, the technical solution of the present invention is:

[0006] A multi-stage sealed screw conveyor suitable for materials in a high-requirement sealed environment includes a housing. A screw shaft is arranged in the housing. One end of the screw shaft penetrates out of the housing. A shaft flange sleeve is arranged at one end of the housing. A bearing seat body is arranged in the shaft flange sleeve. Both the shaft flange sleeve and the bearing seat body are sleeved outside the screw shaft. A bearing gland is hermetically connected to the top of the bearing seat body, and the bearing gland is hermetically connected to the screw shaft. A packing seal cover, packing seal packing and roller bearing are arranged in the bearing seat body. The packing seal cover is located at the bottom of the bearing seat body. A packing seal ring is arranged at the connection between the packing seal cover and the screw shaft. The packing seal packing is located inside the packing seal cover. A spherical bearing is arranged at the end of the housing. The spherical bearing is located at the connection between the housing and the shaft flange sleeve. The spherical bearing, packing seal cover, packing seal packing and roller bearing are all sleeved on the screw shaft. Through the cooperation of multiple sealing methods such as mechanical seal, packing seal, flange seal and bearing seat seal to form a multi-stage sealing structure, the multiple seals assist and complement each other to provide high sealing conditions for the screw conveyor and ensure the normal transportation of materials with high sealing and low leakage requirements.

[0007] Furthermore, a gland seal ring is provided at the connection between the bearing gland and the bearing housing body, a bearing seal ring is provided at the connection between the bearing gland and the screw shaft, gland bolts are provided on the bearing gland, and the bearing gland is connected to the bearing housing body through the gland bolts. The bearing gland and the bearing housing body form a bearing housing sealing structure, reducing the air entering the bearing housing body and increasing the sealing performance.

[0008] Furthermore, one end of the shaft flange sleeve is connected to a reduction motor, a keyway is provided at the end of the screw shaft extending out of the housing, a key pin is provided in the keyway, and the reduction motor is connected to the screw shaft through the key pin. Connecting the reduction motor and the screw shaft through the key pin ensures the stability of the reduction motor driving the screw shaft to rotate.

[0009] Furthermore, a fixed flange is provided at one end of the housing. The fixed flange is connected to the shaft flange sleeve, and a flange seal ring is provided at the connection. Flange bolts are provided at both ends of the fixed flange, and both ends of the fixed flange are respectively connected to the fixed flange and the reduction motor through the flange bolts. The sealing performance of the flange seal is increased through the flange seal ring, reducing the air entering the shaft flange sleeve.

[0010] Furthermore, bearing bolts are provided on the spherical bearing. The spherical bearing is connected to the shaft flange sleeve through the bearing bolts. Sealing cap bolts are provided on the packing gland, and the packing gland is connected to the bearing housing body through the sealing cap bolts. It enables the mechanical seal and the flange seal to form a cooperation, and the bearing housing seal and the packing seal to form a cooperation. The two cooperation seals respectively seal the connection between the shaft flange sleeve and the housing and the inside of the shaft flange sleeve. The multiple seals assist and complement each other.

[0011] Furthermore, a feed inlet and a discharge outlet are respectively provided at both ends of the housing, and spiral blades are provided inside the housing. The spiral blades are fixed on the screw shaft.

[0012] Through the above technical solutions, the beneficial effects of the present invention are as follows:

[0013] The screw shaft of the present invention is axially fixed through a spherical bearing and a roller bearing to form a mechanical seal, reducing the axial clearance caused by eccentricity during the movement of the screw shaft; using packing seal packing for packing seal, and pressing with a packing gland to reduce the contact hard friction between the screw shaft and the packing gland. The gap between the screw shaft and the packing gland is sealed by a packing seal ring. The outside of the roller bearing is sealed by the cooperation of the bearing housing body and the bearing gland for bearing housing seal, and the outside of the bearing housing body is sealed by the shaft flange sleeve for flange seal. Specifically, the present invention forms a multi-stage sealing structure through the cooperation of multiple sealing methods such as mechanical seal, packing seal, flange seal, and bearing housing seal. The multiple seals assist and complement each other, providing high sealing conditions for the screw conveyor and ensuring the normal transportation of materials with high sealing and low leakage requirements. Brief Description of the Drawings

[0014] Figure 1 is a schematic structural view of a multi-stage sealed screw conveyor of the present invention for materials in a high-requirement sealed environment.

[0015] Figure 2 is a partial schematic view of a multi-stage sealed screw conveyor of the present invention for materials in a high-requirement sealed environment.

[0016] Figure 3 is Figure 2 the enlarged view at position A in

[0017] Figure 4 is Figure 2 the enlarged view at position B in

[0018] The reference numerals in the drawings are: 1 is a reduction motor, 2 is a key pin, 3 is a screw shaft, 4 is a shaft flange sleeve, 5 is a bearing gland, 6 is a roller bearing, 7 is a bearing housing body, 8 is a flange sealing ring, 9 is a fixed flange, 10 is a spherical bearing, 11 is a housing sealing ring, 12 is a packing sealing ring, 13 is a packing gland, 14 is a packing sealing packing, 15 is a gland sealing ring, 16 is a bearing sealing ring, 17 is a housing, 18 is a feed inlet, 19 is a discharge outlet, 20 is a screw blade, 21 is a flange bolt, 22 is a bearing bolt, 23 is a cover bolt, 24 is a gland bolt. Detailed Embodiments

[0019] The present invention will be further described below in conjunction with the drawings and detailed embodiments:

[0020] As Figures 1 to 3A multi-stage sealed screw conveyor applicable to materials in a high-demand sealed environment is shown, including a housing 17. A screw shaft 3 is arranged inside the housing 17. One end of the screw shaft 3 penetrates through the housing 17. A shaft flange sleeve 4 is arranged at one end of the housing 17. A bearing seat body 7 is arranged inside the shaft flange sleeve 4. Both the shaft flange sleeve 4 and the bearing seat body 7 are sleeved outside the screw shaft 3. The top of the bearing seat body 7 is hermetically connected with a bearing gland 5. The bearing gland 5 is hermetically connected with the screw shaft 3. The hermetic connection means sealing with a sealing ring. A packing seal cover 13, packing seal packing 14 and a roller bearing 6 are arranged inside the bearing seat body 7. The packing seal cover 13 is located at the bottom of the bearing seat body 7. A packing seal ring 12 is arranged at the connection between the packing seal cover 13 and the screw shaft 3. The packing seal packing 14 is located inside the packing seal cover 13. A spherical bearing 10 is arranged at the end of the housing 17. The spherical bearing 10 is located at the connection between the housing 17 and the shaft flange sleeve 4. The spherical bearing 10, the packing seal cover 13, the packing seal packing 14 and the roller bearing 6 are all sleeved on the screw shaft 3. The screw shaft 3 is axially fixed through the spherical bearing 10 and the roller bearing 6 to form a mechanical seal, reducing the axial clearance caused by eccentricity during the movement of the screw shaft 3. The packing seal packing 14 is used for packing seal and is pressed by the packing seal cover 13, reducing the contact hard friction between the screw shaft 3 and the packing seal 13. The gap between the screw shaft 3 and the packing seal cover 13 is sealed by the packing seal ring 12. The outside of the roller bearing 6 is cooperated with the bearing gland 5 through the bearing seat body 7 for bearing seat seal. The outside of the bearing seat body 7 is flange-sealed through the shaft flange sleeve 4. Through the cooperation of multiple sealing methods such as mechanical seal, packing seal, flange seal and bearing seat seal, a multi-stage sealing structure is formed. The multiple seals assist and complement each other, providing high-sealing conditions for the screw conveyor and ensuring the normal transportation of materials with high-sealing and low-leakage requirements.

[0021] As Figure 4 described, a gland seal ring 15 is arranged at the connection between the bearing gland 5 and the bearing seat body 7. A bearing seal ring 16 is arranged at the connection between the bearing gland 5 and the screw shaft 3. Gland bolts 24 are arranged on the bearing gland 5. The bearing gland 5 is connected with the bearing seat body 7 through the gland bolts 24. The sealing performance of the connection of the bearing gland 5 is increased through the gland seal ring 15 and the bearing seal ring 16. The bearing gland 5 is connected with the bearing seat body 7 through the gland bolts 24 to form a bearing seat seal structure, reducing the air entering the bearing seat body 7 and increasing the sealing performance.

[0022] One end of the shaft flange sleeve 4 is connected to a reduction motor 1. A keyway is provided at one end of the spiral shaft 3 extending out of the housing 17. A key pin 2 is provided in the keyway. The reduction motor 1 is connected to the spiral shaft 3 through the key pin 2. Feed inlets 18 and discharge openings 19 are respectively provided at both ends of the housing 17. A spiral blade 20 is provided in the housing 17. The spiral blade 20 is fixed on the spiral shaft 3. Put the material into the spiral conveyor from the feed inlet 18, turn on the reduction motor 1. The reduction motor 1 is connected to the spiral shaft 3 through the key pin 2 in a cooperative manner to drive the spiral shaft 3 to rotate, thereby driving the spiral blade 20 to rotate to convey the material, and convey the material to the discharge opening 19 and the material leaves the spiral conveyor from the discharge opening 19.

[0023] A fixed flange 9 is provided at one end of the housing 17. The fixed flange 9 is connected to the shaft flange sleeve 4, and a flange sealing ring 8 is provided at the connection. Flange bolts 21 are provided at both ends of the fixed flange 9. Both ends of the fixed flange 9 are respectively connected to the fixed flange 9 and the reduction motor 1 through the flange bolts 21. Connect the fixed flange 9 and the reduction motor 1 through the shaft flange sleeve 4 to fix the reduction motor 1 on the spiral conveyor. Increase the sealing performance of the flange seal through the flange sealing ring 8 and reduce the air entering the shaft flange sleeve 4.

[0024] Bearing bolts 22 are provided on the spherical bearing 10. The spherical bearing 10 is connected to the shaft flange sleeve 4 through the bearing bolts 22. Sealing cap bolts 23 are provided on the stuffing box sealing cover 13. The stuffing box sealing cover 13 is connected to the bearing housing 7 through the sealing cap bolts 23. Connect the spherical bearing 10 and the shaft flange sleeve 4 through the bearing bolts 22 to make the mechanical seal and the flange seal cooperate. Connect the stuffing box sealing cover 13 and the bearing housing 7 through the sealing cap bolts 23 to make the bearing housing seal and the stuffing box seal cooperate. The two cooperative seals respectively seal the connection between the shaft flange sleeve 4 and the housing 17 and the inside of the shaft flange sleeve 4. The multiple seals assist and complement each other.

[0025] During use, the material is put into the screw conveyor from the feed inlet 18. The reduction motor 1 is turned on. The reduction motor 1 is connected to the screw shaft 3 through a key pin 2 to drive the screw shaft 3 to rotate, thereby driving the screw blade 20 to rotate to convey the material. The material is conveyed to the discharge opening 19 and leaves the screw conveyor from the discharge opening 19. The screw shaft 3 is axially fixed through a spherical bearing 10 and a roller bearing 6 to form a mechanical seal, reducing the axial clearance caused by eccentricity during the movement of the screw shaft 3. Packing seal is carried out through a packing seal packing 14 and tightened with a packing seal cover 13 to reduce the contact hard friction between the screw shaft 3 and the packing seal 13. The gap between the screw shaft 3 and the packing seal cover 13 is sealed through a packing seal ring 12. The outside of the roller bearing 6 is sealed by the cooperation of a bearing housing body 7 and a bearing gland 5. The outside of the bearing housing body 7 is flange-sealed through a shaft flange sleeve 4. The spherical bearing 10 is connected to the shaft flange sleeve 4 through a bearing bolt 22 to make the mechanical seal and the flange seal cooperate. The packing seal cover 13 is connected to the bearing housing body 7 through a seal cover bolt 23 to make the bearing housing seal and the packing seal cooperate. The two cooperative seals respectively seal the connection between the shaft flange sleeve 4 and the housing 17 and the inside of the shaft flange sleeve 4. A multi-stage seal structure is formed through the cooperation of multiple seal methods such as mechanical seal, packing seal, flange seal, and bearing housing seal. The multiple seals assist and complement each other to provide high-seal conditions for the screw conveyor and ensure the normal transportation of materials with high-seal and low-leakage requirements.

[0026] The above-described embodiments are only preferred embodiments of the invention and do not limit the scope of the invention. Therefore, any equivalent changes or modifications made to the technical solutions described in the scope of the present invention patent shall be included in the scope of the patent application of the present invention.

Claims

1. A multi-stage sealed screw conveyor applicable to materials in a high-requirement sealing environment, comprising a housing (17), wherein a screw shaft (3) is arranged in the housing (17), and it is characterized in that, One end of the spiral shaft (3) passes through the housing (17). One end of the housing (17) is provided with a shaft flange sleeve (4). A bearing seat body (7) is arranged inside the shaft flange sleeve (4). Both the shaft flange sleeve (4) and the bearing seat body (7) are sleeved outside the spiral shaft (3). The top end of the bearing seat body (7) is hermetically connected with a bearing gland (5). The bearing gland (5) is hermetically connected with the spiral shaft (3). A packing seal cover (13), packing seal packing (14) and a roller bearing (6) are arranged inside the bearing seat body (7). The packing seal cover (13) is located at the bottom of the bearing seat body (7). A packing seal ring (12) is arranged at the connection between the packing seal cover (13) and the spiral shaft (3). The packing seal packing (14) is located inside the packing seal cover (13). A spherical bearing (10) is arranged at the end of the housing (17). The spherical bearing (10) is located at the connection between the housing (17) and the shaft flange sleeve (4). The spherical bearing (10), packing seal cover (13), packing seal packing (14) and roller bearing (6) are all sleeved on the spiral shaft (3); A bearing bolt (22) is arranged on the spherical bearing (10). The spherical bearing (10) is connected with the shaft flange sleeve (4) through the bearing bolt (22). A gland bolt (23) is arranged on the packing seal cover (13). The packing seal cover (13) is connected with the bearing seat body (7) through the gland bolt (23); Feeding ports (18) and discharging ports (19) are respectively arranged at both ends of the housing (17). A spiral blade (20) is arranged inside the housing (17). The spiral blade (20) is fixed on the spiral shaft (3).

2. The multi-stage sealed screw conveyor for materials in a high-requirement sealed environment according to claim 1, wherein A gland seal ring (15) is arranged at the connection between the bearing gland (5) and the bearing seat body (7). A bearing seal ring (16) is arranged at the connection between the bearing gland (5) and the spiral shaft (3). A gland bolt (24) is arranged on the bearing gland (5). The bearing gland (5) is connected with the bearing seat body (7) through the gland bolt (24).

3. The multi-stage sealed screw conveyor for materials in a high-requirement sealed environment according to claim 1, wherein, One end of the shaft flange sleeve (4) is connected with a reduction motor (1). A keyway is arranged at one end of the spiral shaft (3) extending out of the housing (17). A key pin (2) is arranged in the keyway. The reduction motor (1) is connected with the spiral shaft (3) through the key pin (2).

4. The multi-stage sealed screw conveyor for materials in a high-requirement sealed environment according to claim 3, wherein, A fixed flange (9) is arranged at one end of the housing (17). The fixed flange (9) is connected with the shaft flange sleeve (4), and a flange seal ring (8) is arranged at the connection. Flange bolts (21) are arranged at both ends of the fixed flange (9). Both ends of the fixed flange (9) are respectively connected with the fixed flange (9) and the reduction motor (1) through the flange bolts (21).

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