Flexible middle supporting structure of vertical screw conveyor

Abstract

The invention provides a flexible middle supporting structure of a vertical screw conveyor, which solves the problems of blanking buffering and the like of the screw conveyor, and comprises a conveying cylinder, the inner side of the conveying cylinder is movably connected with a connecting shaft through a screw blade, and a driving assembly and a flux adjusting assembly are arranged between the conveying cylinder and the screw blade. A flexible buffering assembly is arranged between the connecting shaft and the spiral blade. The device has the advantages of good structural stability, low failure rate and the like.

Description

Technical Field

[0001] The invention belongs to the technical field of screw conveyors, and in particular relates to a flexible middle support structure of a vertical screw conveyor. Background Art

[0002] The screw conveyor, also known as the auger, is a conveying machine without a flexible traction member. The shaft with spiral blades rotates in a closed trough to push the material to move, or the material moves in a cylinder. After the material enters the fixed trough of the screw conveyor from the feed port, when the drive device drives the spiral shaft to rotate, the material loaded into the trough cannot rotate with the screw due to its mass and the internal friction between the particles and the external friction between the trough wall. However, it can only move forward along the trough under the axial driving force of the screw, and the material is discharged when it reaches the discharge port. The speed of the spiral body of the existing vertical screw conveyor is higher than that of the ordinary screw conveyor. Under the action of centrifugal force, the added material generates friction with the casing. This friction prevents the material from rotating with the spiral blades and overcomes the gravity of the material falling, thereby realizing the vertical transportation of the material. However, when used for vertical downward transportation, the existing vertical screw conveyor has a fast drop rate due to the deadweight of the material and the centrifugal force, which makes its discharge structure prone to blockage, and at the same time causes impact on the supporting structure, making the bearing and other structures prone to displacement and dislocation. In addition, materials can easily invade the transmission structure during transmission, causing it to jam.

[0003] In order to solve the deficiencies of the existing technology, people have conducted long-term exploration and proposed various solutions. For example, a Chinese patent document discloses a vertical spiral tooth plate crushing and conveying device [201811234360.2], which includes a circular cylinder, an arc-shaped crushing tooth plate and an outer circular tooth-shaped spiral blade, the inner cavity circumferential side wall of the circular cylinder is installed with equally spaced arc-shaped crushing tooth plates, the outer circular tooth-shaped spiral blade is rotatably connected to the inner cavity center axis of the circular cylinder, granular material is arranged between the circular cylinder and the outer circular tooth-shaped spiral blade, and the granular material is located between two adjacent groups of arc-shaped crushing tooth plates, the arc-shaped crushing tooth plate is fixed to the inner cavity circumferential side wall of the circular cylinder by bolts, and the side of the arc-shaped crushing tooth plate close to the circular cylinder is in an arc shape that matches the circular cylinder.

[0004] The above solution solves the problem of material intrusion into the transmission structure during transmission to a certain extent, but the solution still has many shortcomings, such as the inability to perform material drop buffering. Summary of the invention

[0005] The object of the present invention is to provide a flexible intermediate support structure of a vertical screw conveyor with a reasonable design and good material falling buffering effect in view of the above problems.

[0006] To achieve the above-mentioned objectives, the present invention adopts the following technical solutions: a flexible intermediate support structure of a vertical screw conveyor, comprising a conveying cylinder, the inner side of which is movably connected to a connecting shaft through spiral blades, a driving assembly and a flux adjustment assembly are arranged between the conveying cylinder and the spiral blades, and a flexible buffer assembly is arranged between the connecting shaft and the spiral blades.

[0007] In the above-mentioned flexible intermediate support structure of a vertical screw conveyor, the driving assembly includes a driving cover body which is centrally symmetrically arranged and installed on the outside of the conveying cylinder, and driving shafts are rotatably installed in the driving cover body. The driving shafts are connected to the driving motor through a speed change gear set, and a planetary gear set is connected between the driving shafts. The spiral blades are connected to a driving cover that fits the inner side of the conveying cylinder, and a driving gear ring that meshes with the planetary gear set is provided on the inner side of the driving cover.

[0008] In the above-mentioned flexible intermediate support structure of a vertical screw conveyor, the flux adjustment component includes an adjustment baffle that is movably installed in a centrally symmetrical manner in a driving cover body. The adjustment baffle is rotatably connected to the upper end of the driving cover body and is provided with an adjustment groove. An adjustment ring is rotatably installed in the driving cover body and the adjustment ring has an adjustment protrusion that is slidably connected to the adjustment groove. The adjustment ring is meshed with the adjustment motor through a speed change gear set for transmission.

[0009] In the above-mentioned flexible intermediate support structure of a vertical screw conveyor, the flexible buffer component extends to the top of the connecting shaft and the spiral blades.

[0010] In the above-mentioned flexible intermediate support structure of a vertical screw conveyor, the flexible buffer component includes a vibration-damping chamber arranged inside the connecting shaft, a vertically arranged vibration-damping rod is arranged in the vibration-damping chamber, a spherical damping block is slidably installed on the vibration-damping rod, vibration-damping springs are respectively installed between the damping block and the upper and lower ends of the vibration-damping chamber, and the damping block is connected to an axial conduction component and a radial conduction component.

[0011] In the above-mentioned flexible intermediate support structure of a vertical screw conveyor, the axial conduction component includes a hoop surrounding the circumference of the damping block, the hoop is hinged with a plurality of conduction rods arranged in a central symmetrical manner, the conduction rods extend to the upper end of the connecting shaft and are hinged with a conical buffer cover at the end, the buffer cover is movably installed above the connecting shaft and a ball and socket joint is installed between the buffer cover and the upper end of the connecting shaft, the hoop slides in contact with the surface of the damping block, and the damping block is respectively provided with limit rings for limiting the hoop, and an elastic reset member is installed between the limit ring and the hoop.

[0012] In the above-mentioned flexible intermediate support structure of a vertical screw conveyor, the radial conduction component includes a conduction block arranged along a spiral trajectory and telescopically mounted on a connecting shaft, the conduction block has a buffer baffle opposite to the spiral blade, and the conduction block is hinged to the limit ring through a conduction connecting rod.

[0013] In the above-mentioned flexible intermediate support structure of a vertical screw conveyor, a transfer plate is provided at the lower end of the conveying cylinder, and a material distribution component linked to the connecting shaft is provided on the transfer plate.

[0014] In the above-mentioned flexible intermediate support structure of a vertical screw conveyor, the material distribution assembly includes a material distribution plate rotatably mounted on an adapter plate, and the adapter plate and the material distribution plate are respectively provided with material distribution openings which are centrally symmetrical and mutually offset or overlapped, and a transmission rod which is plugged into the lower end of the connecting shaft and axially limited is fixed at the center of the material distribution plate, and a plurality of push rods corresponding to the material distribution openings of the material distribution plate are installed above the material distribution plate through a material distribution frame body, and an elastic reset part is installed between the push rod and the material distribution frame body, the upper end of the push rod is pressed against the spiral blade and the lower end is fixed with a push plate which cooperates with the material distribution opening.

[0015] In the above-mentioned flexible intermediate support structure of a vertical screw conveyor, flanges are respectively provided at the upper and lower ends of the conveying cylinder, and the upper and lower ends of the connecting shaft are respectively closed by flange covers.

[0016] Compared with the existing technology, the advantages of the present invention are: the flux regulating component adjusts the material transmission rate, and the flexible buffer component reduces the impact vibration during the blanking process, thereby ensuring the stable position of the connecting shaft and extending the overall life of the supporting structure; the flexible buffer component absorbs the impact of the falling material radially and axially, maintains the stability of the spiral blade structure, and improves the control accuracy of the blanking transmission; the material dividing component cooperates with the connecting shaft to control the opening and closing of the conveying cylinder outlet to evenly drop the material and prevent its outlet from being blocked. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a structural schematic diagram of another perspective of the present invention; Figure 3 It is a structural cross-sectional view of the present invention; Figure 4 is a schematic structural diagram of a flux regulating component of the present invention; Figure 5 is a partial cross-sectional view of the present invention; Figure 6 is a structural sectional view of the connecting shaft of the present invention; Figure 7 is another partial cross-sectional view of the present invention; In the figure, conveying cylinder 1, flange plate 11, flange cover 12, spiral blade 2, connecting shaft 3, driving assembly 4, driving cover body 41, driving shaft 42, driving motor 43, planetary gear set 44, driving cover 45, driving gear ring 46, flux adjustment assembly 5, adjustment baffle 51, adjustment groove 52, adjustment ring 53, adjustment protrusion 54, adjustment motor 55, flexible buffer assembly 6, vibration reduction chamber 61, vibration reduction rod 62, damping block 63, vibration reduction spring 64, axial conduction assembly 7, hoop 71, conduction rod 72, buffer cover 73, ball and socket joint 74, limit ring 75, conduction block 76, buffer baffle 77, adapter plate 8, distribution plate 81, distribution port 82, transmission rod 83, distribution frame 84, push rod 85, push plate 86. DETAILED DESCRIPTION

[0018] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] like Figure 1-7 As shown, a flexible intermediate support structure of a vertical screw conveyor includes a conveying cylinder 1 connected to a corresponding material bearing system, and a corresponding transfer structure is connected to the lower end of the conveying cylinder 1; the inner side of the conveying cylinder 1 is movably connected to the connecting shaft 3 through a spiral blade 2, and a driving component 4 and a flux adjustment component 5 are arranged between the conveying cylinder 1 and the spiral blade 2. The driving component 4 provides a driving force for the spiral blade 2 to make the material descend, wherein the flux adjustment component 5 limits the feed amount at the upper end of the conveying cylinder 1. A flexible buffer component 6 is arranged between the connecting shaft 3 and the spiral blade 2. When the material moves along the spiral trajectory and impacts the connecting shaft 3 under the action of centrifugation, the flexible buffer component 6 absorbs its axial and radial impacts, thereby preventing its displacement and dislocation from affecting the normal conduction movement of the spiral blade 2.

[0020] Specifically, different from the existing central shaft drive structure, the drive assembly 4 in this embodiment includes a drive cover 41 arranged symmetrically on the outside of the conveying cylinder 1, and drive shafts 42 are rotatably installed in the drive cover 41. The drive shafts 42 are connected to the drive motors 43 through the speed change gear set, and the drive shafts 42 are connected to the planetary gear set 44. The spiral blades 2 are connected to the drive cover 45 that fits the inside of the conveying cylinder 1, and the drive cover 45 is provided with a drive gear ring 46 that meshes with the planetary gear set 44. The drive motor 43 provides driving force, and the speed change gear set and the drive motor 43 drive the spiral blades 2 to rotate, so as to facilitate the direct connection between the upper end of the conveying cylinder 1 and the material receiving system. In this embodiment, four sets of drive covers 41 arranged symmetrically on the center are preferably used, and each drive shaft 42 is linked and meshes with the drive cover 45 for transmission, so as to maintain the balance of the drive cover 45 and its inner spiral blades 2.

[0021] In depth, the flux adjustment component 5 controls the opening and closing amount of the top of the conveying cylinder 1, and specifically includes an adjustment baffle 51 that is movably installed in the driving cover body 41 in a centrally symmetrical manner. The adjustment baffle 51 is rotatably connected to the upper end of the driving cover body 41 and has an adjustment groove 52. An adjustment ring 53 is rotatably installed in the driving cover body 41, and the adjustment ring 53 has an adjustment protrusion 54 that is slidably connected to the adjustment groove 52. The adjustment ring 53 is meshed and driven by the adjustment motor 55 through a speed change gear set. The independent adjustment motor 55 drives the adjustment ring 53 to rotate circumferentially, and the adjustment protrusion 54 slides along the adjustment groove 52 to drive the adjustment baffle 51 to flip relative to the driving cover body 41. The adjustment baffle 51 is arc-shaped as a whole to ensure that the top of the channel between the conveying cylinder 1 and the connecting shaft 3 can be completely closed.

[0022] Furthermore, the flexible buffer component 6 directly contacts and collides with the conducted material, and extends to the top of the connecting shaft 3 and the spiral blade 2. The flexible buffer component 6 at the top of the connecting shaft 3 buffers the material falling from the upper end of the conveying cylinder 1 to avoid direct collision with the connecting shaft 3. The flexible buffer component 6 also guides the material into the channel of the spiral blade 2. The edge of the spiral blade 2 is provided with a wear-resistant alloy, and forms a supporting structure with the drive cover 45 and the drive cover 45 through a movable assembly.

[0023] Furthermore, in order to fully absorb the impact of the material and prevent the connection shaft 3 from deflecting, the flexible buffer component 6 includes a vibration damping chamber 61 arranged inside the connection shaft 3, a vertically arranged vibration damping rod 62 is arranged in the vibration damping chamber 61, a spherical damping block 63 is slidably mounted on the vibration damping rod 62, and vibration damping springs 64 are respectively installed between the damping block 63 and the upper and lower ends of the vibration damping chamber 61, and the damping block 63 is connected to the axial conduction component 7 and the radial conduction component. The damping block 63 jumps up and down and the vibration is absorbed by the vibration damping spring 64, and the axial conduction component 7 and the radial conduction component convert the transverse wave and longitudinal wave of the connection shaft 3 and the spiral blade 2 and absorb them by the vibration damping spring 64 and the damping block 63.

[0024] In addition, the axial conduction component 7 conducts vibration, specifically including a hoop 71 surrounding the damping block 63 in the circumferential direction, the hoop 71 is hinged with a plurality of conduction rods 72 arranged symmetrically in the center, the conduction rods 72 extend to the upper end of the connecting shaft 3 and are hinged with a conical buffer cover 73 at the end, when the buffer cover 73 is impacted by the material, it deviates, and at the same time, the conduction rods 72 drive the hoop 71 to flip, and during the flipping process, the center of the hoop 71 remains consistent with the center of the damping block 63. The buffer cover 73 is movably installed above the connecting shaft 3 and a ball and socket joint 74 is installed between the upper end of the connecting shaft 3, the hoop 71 and the damping block 63 are fitted and slid, and the damping block 63 is respectively provided with limit rings 75 for limiting the hoop 71, and an elastic reset member is installed between the limit ring 75 and the hoop 71 to automatically reset the deviated hoop 71, so as to ensure that the hoop 71 and the buffer cover 73 are arranged horizontally under normal conditions.

[0025] At the same time, in order to further reduce the vibration of the spiral blade 2, the radial conduction assembly includes a conduction block 76 arranged along the spiral track and telescopically mounted on the connecting shaft 3. The conduction block 76 has a buffer baffle 77 opposite to the spiral blade 2. The buffer baffle 77 receives the material of the conduction block 76 and moves radially. The conduction block 76 is hinged to the limit ring 75 through a conduction connecting rod. Under the centrifugal action, the material slides along the spiral track, and the conduction block 76 guides the material to ensure that it is evenly distributed on the spiral blade 2.

[0026] It can be seen that in order to prevent the material from clogging the port of the conveying cylinder 1, the lower end of the conveying cylinder 1 is equipped with an adapter plate 8, and the adapter plate 8 is provided with a material distribution component linked with the connecting shaft 3. The material distribution component enables the adapter plate 8 to drop materials evenly in the circumferential direction, and at the same time provides additional driving force to its discharge position.

[0027] Obviously, the material distribution assembly includes a material distribution plate 81 rotatably mounted on the adapter plate 8, and the adapter plate 8 and the material distribution plate 81 are respectively provided with material distribution openings 82 that are centrally symmetrical and mutually displaced or overlapped, and the discharge amount is limited by adjusting their relative angles, and a locking structure is also provided between the material distribution plate 81 and the adapter plate 8 to fix their relative angles. A transmission rod 83 that is plugged into the lower end of the connecting shaft 3 and axially limited is fixed at the center of the material distribution plate 81, and a plurality of push rods 85 corresponding to the material distribution openings 82 of the material distribution plate 81 are installed above the material distribution plate 81 through a material distribution frame 84, and an elastic reset part is installed between the push rod 85 and the material distribution frame 84, and the upper end of the push rod 85 is pressed against the spiral blade 2 and the lower end is fixed with a push plate 86 that matches the material distribution opening 82, and the push plates 86 are combined with each other to fully cover the upper end of the material distribution plate 81 to ensure that it has sufficient pushing area. As the spiral blade 2 rotates, the push rods 85 at the lower end thereof are pressed down and reset one by one, thereby squeezing the material at the material distribution port 82 to avoid material agglomeration and blockage. The material discharge order of the material distribution port 82 is consistent with the rotation angle of the spiral blade 2.

[0028] Preferably, in order to improve the sealing performance of the transfer, flanges 11 are respectively provided at the upper and lower ends of the conveying cylinder 1, and the flanges 11 are usually matched with sealing gaskets to reduce the interface gap. The upper and lower ends of the connecting shaft 3 are respectively closed by flange covers 12, and the flanges 11 maintain the internal cavity of the connecting shaft 3 closed and provide support for other movable structures.

[0029] To sum up, the principle of this embodiment is that the spiral blade 2 rotates under the action of the driving component 4, and the total amount of feed is regulated by the flux regulating component 5, wherein the flexible buffer component 6 performs multi-directional buffering and vibration reduction on the spiral blade 2 to avoid deformation of the spiral blade 2 and misalignment of the center of the connecting shaft 3 relative to the conveying cylinder 1.

[0030] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0031] Although this article uses more terms such as conveying cylinder 1, flange 11, flange cover 12, spiral blade 2, connecting shaft 3, drive assembly 4, drive cover body 41, drive shaft 42, drive motor 43, planetary gear set 44, drive cover 45, drive gear ring 46, flux adjustment assembly 5, adjustment baffle 51, adjustment groove 52, adjustment ring 53, adjustment protrusion 54, adjustment motor 55, flexible buffer assembly 6, vibration reduction chamber 61, vibration reduction rod 62, damping block 63, vibration reduction spring 64, axial conduction assembly 7, hoop 71, conduction rod 72, buffer cover 73, ball and socket joint 74, limit ring 75, conduction block 76, buffer baffle 77, adapter plate 8, distribution plate 81, distribution port 82, transmission rod 83, distribution frame 84, push rod 85, push plate 86, etc., it does not exclude the possibility of using other terms. These terms are used only to more conveniently describe and explain the essence of the present invention; any additional limitations interpreted as them are contrary to the spirit of the present invention.

Claims

1. A flexible intermediate support structure of a vertical screw conveyor, comprising a conveying cylinder (1), characterized in that: The inner side of the conveying cylinder (1) is movably connected to the connecting shaft (3) via the spiral blade (2); a driving component (4) and a flux regulating component (5) are provided between the conveying cylinder (1) and the spiral blade (2); and a flexible buffer component (6) is provided between the connecting shaft (3) and the spiral blade (2).

2. The flexible intermediate support structure of a vertical screw conveyor according to claim 1, characterized in that: The driving assembly (4) comprises a driving cover body (41) which is centrally symmetrically arranged and mounted on the outside of the conveying cylinder (1). Driving shafts (42) are rotatably mounted in the driving cover body (41). The driving shafts (42) are connected to driving motors (43) through a speed change gear set. A planetary gear set (44) is connected between the driving shafts (42). The spiral blades (2) are connected to a driving cover (45) which is in contact with the inside of the conveying cylinder (1). A driving gear ring (46) which is meshed with the planetary gear set (44) is arranged on the inside of the driving cover (45).

3. The flexible intermediate support structure of a vertical screw conveyor according to claim 2, characterized in that: The flux adjustment component (5) comprises an adjustment baffle (51) movably mounted in a centrally symmetrical manner in a driving cover body (41); the adjustment baffle (51) is rotatably connected to the upper end of the driving cover body (41) and is provided with an adjustment groove (52); an adjustment ring (53) is rotatably mounted in the driving cover body (41) and the adjustment ring (53) has an adjustment protrusion (54) slidably connected to the adjustment groove (52); and the adjustment ring (53) is meshed with an adjustment motor (55) through a speed change gear set for transmission.

4. The flexible intermediate support structure of a vertical screw conveyor according to claim 1, characterized in that: The flexible buffer component (6) extends to the top of the connecting shaft (3) and the spiral blade (2).

5. The flexible intermediate support structure of a vertical screw conveyor according to claim 4, characterized in that: The flexible buffer component (6) comprises a vibration-damping chamber (61) arranged inside the connecting shaft (3), a vibration-damping rod (62) arranged vertically in the vibration-damping chamber (61), a spherical damping block (63) slidably mounted on the vibration-damping rod (62), vibration-damping springs (64) respectively mounted between the damping block (63) and the upper and lower ends of the vibration-damping chamber (61), and the damping block (63) is connected to an axial conduction component (7) and a radial conduction component.

6. The flexible intermediate support structure of a vertical screw conveyor according to claim 5, characterized in that: The axial conduction component (7) comprises a hoop (71) surrounding the damping block (63) in the circumferential direction, the hoop (71) being hinged with a plurality of conduction rods (72) arranged in a central symmetrical manner, the conduction rods (72) extending to the upper end of the connecting shaft (3) and hinged with a conical buffer cover (73) at the end, the buffer cover (73) being movably mounted above the connecting shaft (3) and having a ball and socket joint (74) mounted between the buffer cover and the upper end of the connecting shaft (3), the hoop (71) slidingly fittingly engaging with the surface of the damping block (63), the damping block (63) being provided with limit rings (75) on the upper and lower parts thereof for limiting the hoop (71), and an elastic reset member being mounted between the limit ring (75) and the hoop (71).

7. The flexible intermediate support structure of a vertical screw conveyor according to claim 6, characterized in that: The radial conduction assembly comprises a conduction block (76) arranged along a spiral track and telescopically mounted on the connecting shaft (3), the conduction block (76) having a buffer baffle (77) opposite to the spiral blade (2), and the conduction block (76) being hinged to the limit ring (75) via a conduction connecting rod.

8. The flexible intermediate support structure of a vertical screw conveyor according to claim 1, characterized in that: The lower end of the conveying cylinder (1) is equipped with an adapter plate (8), and the adapter plate (8) is provided with a material distribution component that is linked to the connecting shaft (3).

9. The flexible intermediate support structure of a vertical screw conveyor according to claim 8, characterized in that: The material distribution assembly comprises a material distribution plate (81) rotatably mounted on an adapter plate (8); the adapter plate (8) and the material distribution plate (81) are respectively provided with material distribution openings (82) which are centrally symmetrical and mutually offset or overlapped; a transmission rod (83) which is plugged into the lower end of the connecting shaft (3) and axially limited is fixed at the center of the material distribution plate (81); a plurality of push rods (85) corresponding to the material distribution openings (82) of the material distribution plate (81) are installed above the material distribution plate (81) through a material distribution frame (84); an elastic reset member is installed between the push rods (85) and the material distribution frame (84); the upper end of the push rod (85) is pressed against the spiral blade (2) and the lower end is fixed with a push plate (86) which cooperates with the material distribution opening (82).

10. The flexible intermediate support structure of a vertical screw conveyor according to claim 1, characterized in that: The upper and lower ends of the conveying cylinder (1) are respectively provided with flange plates (11), and the upper and lower ends of the connecting shaft (3) are respectively closed by flange covers (12).

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