Screw conveyer with self-aligning sealing structure

Abstract

The utility model belongs to the technical field of powder and particle material conveying, and relates to a spiral conveyor with a self-aligning sealing structure, which comprises a conveying chute shell and a spiral transmission shaft arranged in the conveying chute shell and penetrating through the central axis of the conveying chute shell, and two ends of the spiral transmission shaft are respectively provided with a shaft end sealing seat and a bearing seat. A material blocking ring and an air purging ring are arranged between the shaft end sealing seat and the spiral transmission shaft, an air blocking ring and filler are arranged on the two sides of the air purging ring respectively, the bearing seat is connected to the outer side of the shaft end sealing seat, and a self-aligning bearing is arranged on the bearing seat. According to the structure, self-aligning sealing structures at the two shaft ends of the spiral conveyor can be kept consistent with the axis of the spiral transmission shaft, air purging pressure is evenly applied to purge and expel powder and particle materials, the materials can be effectively prevented from leaking in the circumferential direction of the spiral shaft, and the self-aligning sealing structure has the advantages of being stable, reliable, good in aligning effect, high in sealing capacity, durable, effective and the like. Repeated maintenance and replacement are avoided, and continuous production is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the solid conveying technical field of powder and particle, specifically relates to a spiral conveyor with self-aligning sealing structure. BACKGROUND

[0002] At present, the spiral conveyor on the market is mainly composed of a shell, a spiral transmission shaft, a hanging bearing, a cover plate, an end plate and a power transmission system, and since the coaxiality of the two ends of the spiral transmission shaft and the end plate sealing seat is not easy to guarantee, deviation occurs, which causes powder and material leakage from the two ends of the spiral transmission shaft when pressure operation occurs, thereby bringing great safety hazards and environmental pollution to production. CONTENT OF THE UTILITY MODEL

[0003] The utility model aims at the problems of unreliable sealing, easy powder and material leakage and the like of the existing spiral conveyor, and designs a spiral conveyor with self-aligning sealing structure, which is stable and reliable, has good aligning effect, strong sealing capacity and long-term effectiveness.

[0004] To achieve the above object, the utility model adopts the technical scheme of a spiral conveyor with self-aligning sealing structure, which comprises a conveying groove shell and a spiral transmission shaft arranged inside the conveying groove shell and penetrating a central axis thereof, the two ends of the spiral transmission shaft are each provided with an axle end sealing seat and a bearing seat, a material blocking ring and a gas blowing ring are arranged between the axle end sealing seat and the spiral transmission shaft, a gas blocking ring and packing are arranged on the two sides of the gas blowing ring, the bearing seat is connected to the outside of the axle end sealing seat, and a aligning bearing is arranged on the bearing seat.

[0005] Preferably, the axle end sealing seat is coaxially connected to a conveying groove shell end flange through an end plate, and an adjusting sealing gasket and a first adjusting bolt are arranged between the end plate and the conveying groove shell.

[0006] Preferably, the material blocking ring is arranged between the end plate and the spiral transmission shaft, and an O-shaped sealing ring and a second adjusting bolt are arranged between the axle end sealing seat and the end plate.

[0007] Preferably, the gas blowing ring is connected to a blowing gas path, a compression adjusting ring is arranged between the gas blowing ring and the spiral transmission shaft, and a packing gland is arranged on the side of the packing away from the gas blowing ring.

[0008] Preferably, a bearing seat gland is arranged on the bearing seat, an end face locking cover is arranged at one end of the bearing seat, and a speed reducer and a motor connected to the spiral transmission shaft are arranged at the other end of the bearing seat.

[0009] Preferably, a speed signal sensor, a temperature sensor and a junction box are further arranged on the bearing seat.

[0010] Preferably, the conveying groove shell is respectively provided with a feeding port and a discharging port at two ends thereof, and is further provided with an air inlet, an air outlet, a dust removal port and an observation window.

[0011] Preferably, the conveying groove shell is further provided with a flow meter and an adjusting valve at the discharging port.

[0012] After the above technical scheme is adopted, the spiral conveyor with the self-centering sealing structure has the following beneficial effects:

[0013] The structure design of the utility model can keep the self-centering sealing structure of the two shaft ends of the spiral conveyor consistent with the axis of the spiral transmission shaft, uniformly apply air blowing and purging pressure to blow and drive away the powder and granular material, effectively block the leakage of the material from the circumferential direction of the spiral shaft, prevent the powder and granular material (toxic and polluting material) from entering the material blocking ring and the air blowing and purging ring, thereby avoiding air blowing and purging failure, material overflow and sealing air leakage and other problems, avoiding pollution of the environment, interruption of production, loss and the like; meanwhile, the material blocking ring and the air blowing and purging ring have self-lubricating performance, can be free of oil lubrication maintenance, are not polluted to the material, and are safe and effective. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a structural schematic view of the utility model of a spiral conveyor with a self-centering sealing structure.

[0015] Figure 2 It is a partial structural schematic view of the utility model of a spiral conveyor with a self-centering sealing structure. Figure One ;

[0016] Figure 3 It is a partial structural schematic view of the utility model of a spiral conveyor with a self-centering sealing structure. Figure Two ;

[0017] Figure 4 It is an isometric view of the utility model of a spiral conveyor with a self-centering sealing structure. Figure One ;

[0018] Figure 5 It is an isometric view of the utility model of a spiral conveyor with a self-centering sealing structure. Figure Two .

[0019] Wherein: 1. shaft end locking bolt; 2. gland anti-rotation bolt; 3. end face locking cover; 4 / 36. packing gland; 5 / 49. second adjusting bolt; 6 / 48. first adjusting bolt; 7 / 29. adjusting sealing gasket; 8 / 50. O-shaped sealing ring; 9. spacer sleeve; 10 / 39. bearing seat gland; 11 / 38. aligning bearing; 12 / 37. bearing seat; 13 / 35. shaft end sealing seat; 14 / 34. packing; 15 / 32. compression adjusting ring; 16 / 33. purge gas path; 17 / 31. gas purge ring; 18 / 28. gas blocking ring; 19 / 30. end plate; 20 / 27. material blocking ring; 21. feed inlet; 22. gas inlet; 23. observation window; 25. dust removal port; 26. exhaust port; 40. screw transmission shaft; 41. locking screw; 42. motor; 43. speed reducer; 44. torsion arm locking bolt; 45. torsion arm; 46. torsion arm connecting support; 47. packing gland locking bolt; 51. discharge port; 52. conveying tank shell; 53. flow meter; 54. regulating valve; 56. speed signal sensor; 57. junction box; 58. temperature sensor. DETAILED DESCRIPTION

[0020] The utility model will be further clearly and completely described below in combination with the drawings and specific embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative, but not as any limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0021] It should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and furthermore, it should be understood that when the terms "comprise" and / or "include" are used in the specification, there is a feature, step, operation, device, component and / or combination thereof.

[0022] The foregoing description, for purposes of explanation, sets forth specific values and arrangements of components and steps that are subject to many options. The intent is to be accurate in describing the principles and novel features of the application. Thus, although the application has been described with reference to specific embodiments thereof, it will be apparent to those of ordinary skill in the art that a number of changes can be made to the embodiments described without departing from the spirit and scope of the application. For example, the various features of the application can be combined in any combination, where possible. Accordingly, the scope of the application is to be construed as encompassing modifications and variations of the specific examples described herein, subject only to the conditions of the prior art.

[0023] In the description of the present application, it needs to be understood that the orientation words such as "front, back, up, down, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicated orientation or position relationship is usually based on the orientation or position relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, without making the opposite statement, these orientation words do not indicate and imply that the device or element referred to must have a particular orientation or be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the protection scope of the present application; the orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.

[0024] For the convenience of description, spatial relative terms such as "over", "above", "upper surface", "upper" and the like can be used herein to describe the spatial position relationship of one device or feature with other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the drawings. For example, if the device in the drawing is inverted, the device described as "above" or "over" other devices or structures will be positioned "below" or "under" other devices or structures. Thus, the example term "above" can include both "above" and "below" orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative description used herein is interpreted accordingly.

[0025] In addition, it needs to be explained that the use of "first", "second" and the like to limit parts only for the convenience of distinguishing the corresponding parts, and if there is no further declaration, the above words have no special meaning, therefore, it cannot be understood as a limitation on the protection scope of the present application.

[0026] This utility model discloses a screw conveyor with a self-aligning sealing structure, such as... Figures 1-5 As shown, the device includes a U-shaped conveying trough housing 52 and a spiral drive shaft 40 disposed inside the conveying trough housing 52 and passing through its central axis. Both ends of the spiral drive shaft 40 are provided with shaft end seals 13 and bearing seats 12. The shaft end seals 13 are coaxially connected to the end flange of the conveying trough housing 52 through end plates 19. A baffle ring 20 and an air purge ring 17 are provided between the shaft end seals 13 and the spiral drive shaft 40. Air baffle rings 18 and packing 14 are respectively provided on both sides of the air purge ring 17. The baffle ring 20 is a floating self-aligning baffle ring, which is pressed into the central hole of the end plate 19 by the shaft end seals 13, that is, it is disposed between the end plate 19 and the spiral drive shaft 40. Furthermore, the inner hole of the baffle ring 20 has multiple concentric grooves, which can reduce friction with the spiral drive shaft 40 and the material, and at the same time form a special air ring to prevent the material from moving outward along the central line of the spiral drive shaft 40.

[0027] The purge ring 17 is connected to the purge air passage 16, and a pressure adjustment ring 15 is provided between the purge ring 17 and the screw drive shaft 40. The packing 14 adopts a multi-layer seal and has self-lubricating characteristics. It can fill the gap between the screw drive shaft 40 and the center hole of the shaft end sealing seat 13 in time, preventing material and sealing gas from overflowing. It has the characteristics of wear resistance, lubrication-free and maintenance-free, which ensures continuous production. The packing 14 is provided with a packing gland 4 on the side away from the purge ring 17.

[0028] An adjusting sealing gasket 7 and a first adjusting bolt 6 are provided between the end plate 19 and the conveying trough housing 52. An O-ring 8 and a second adjusting bolt 5 are provided between the shaft end sealing seat 13 and the end plate 19, forming an adjusting mechanism. This mechanism has a stabilizing effect on the transmission of the screw drive shaft 40 and prevents the screw drive shaft 40 from slipping on the shaft end sealing seat 13 due to gravity.

[0029] The bearing housing 12 is connected to the outside of the shaft end seal 13, and the bearing housing 12 is provided with a self-aligning bearing 11. The bearing housing 12 is provided with a bearing housing cover 10, and one end of the bearing housing 12 is provided with an end face locking cover 3, a spacer 9, a shaft end locking 1 and a cover anti-rotation bolt 2. The other end of the bearing housing 12 is provided with a reducer 43 and a motor 42 connected to the screw drive shaft 40. The central transmission hole of the reducer 43 passes through the transmission end of the screw drive shaft 40, is connected by a key, and is positioned on the step surface of the transmission end of the screw drive shaft 40. It is fixed to the shaft end seal 13 by a torque arm 45 and a torque arm connecting support 46 to prevent the reducer 43 from rotating with the screw drive shaft 40.

[0030] The bearing seat 12 is further provided with a speed signal sensor 56, a temperature sensor 58 and a terminal box 57, the conveying groove shell 52 is respectively provided with a feeding port 21 and a discharging port 51 at two ends, the conveying groove shell 52 is further provided with an air inlet 22, an air outlet 26, a dust removal port 25 and an observation window 23, and the conveying groove shell 52 is further provided with a flow meter 53 and an adjusting valve 54 at the discharging port 51.

[0031] In summary, the spiral conveyor with self-aligning sealing structure can effectively prevent the material from entering the two shaft ends of the spiral transmission shaft, and the sweeping gas is uniformly distributed into the center hole of the gas sweeping ring, the gas blocking ring and the material blocking ring along the spiral transmission shaft, so that the sweeping gas is uniformly distributed to sweep the material, and the material is not prone to be blown away due to large friction, and the spiral conveyor has the advantages of stable and reliable, good aligning effect, strong sealing capacity, long-term and effective, free from repeated maintenance and replacement, continuous production guarantee, and the like, can provide equipment guarantee for dilute phase and dense phase conveying, has great market value, and is worth being widely applied.

[0032] The above is only a preferred specific embodiment of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the utility model concept of the utility model within the technical range disclosed by the utility model, and all should be covered in the protection scope of the utility model.

Claims

1. A screw conveyor with a self-aligning sealing structure, characterized in that: The system includes a conveying tank housing (52) and a spiral drive shaft (40) disposed inside the conveying tank housing (52) and passing through its central axis. Both ends of the spiral drive shaft (40) are provided with shaft end seals (13) and bearing seats (12). A baffle ring (20) and an air purge ring (17) are provided between the shaft end seals (13) and the spiral drive shaft (40). An air baffle ring (18) and a packing (14) are respectively provided on both sides of the air purge ring (17). The bearing seat (12) is connected to the outside of the shaft end seals (13), and a self-aligning bearing (11) is provided on the bearing seat (12).

2. A screw conveyor with a self-aligning sealing structure according to claim 1, characterized in that: The shaft end sealing seat (13) is coaxially connected to the end flange of the conveying tank housing (52) via the end plate (19), and an adjusting sealing gasket (7) and a first adjusting bolt (6) are provided between the end plate (19) and the conveying tank housing (52).

3. A screw conveyor with a self-aligning sealing structure according to claim 2, characterized in that: The baffle ring (20) is disposed between the end plate (19) and the screw drive shaft (40), and an O-ring (8) and a second adjusting bolt (5) are provided between the shaft end sealing seat (13) and the end plate (19).

4. A screw conveyor with a self-aligning sealing structure according to claim 1, characterized in that: The purge ring (17) is connected to the purge air passage (16), and a pressure adjustment ring (15) is provided between the purge ring (17) and the screw drive shaft (40). A packing gland (4) is provided on the side of the packing (14) away from the purge ring (17).

5. A screw conveyor with a self-aligning sealing structure according to claim 1, characterized in that: The bearing housing (12) is provided with a bearing housing cover (10), and one of the bearing housings (12) is provided with an end face locking cover (3) at one end, and the other bearing housing (12) is provided with a reducer (43) and a motor (42) connected to the screw drive shaft (40).

6. A screw conveyor with a self-aligning sealing structure according to claim 1, characterized in that: The bearing housing (12) is also equipped with a speed signal sensor (56), a temperature sensor (58), and a junction box (57).

7. A screw conveyor with a self-aligning sealing structure according to claim 1, characterized in that: The conveying trough housing (52) is provided with a feed inlet (21) and a discharge outlet (51) at both ends. The conveying trough housing (52) is also provided with an air inlet (22), an exhaust outlet (26), a dust removal outlet (25) and an observation window (23).

8. A screw conveyor with a self-aligning sealing structure according to claim 7, characterized in that: The conveying tank housing (52) is also equipped with a flow meter (53) and a regulating valve (54) at the discharge port (51).

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