Spiral feeding and adjusting device for middling powder

Abstract

The utility model discloses a kind of middlings powder screw feed adjusting device, it is related to middlings powder production device technical field, including shell and the transmission shaft being horizontally rotated and being arranged in it, transmission shaft axial direction is identical with shell length direction, multiple structures same sleeve shaft are coaxially equipped on transmission shaft outside, spiral plate one and spiral plate two are fixed on the outer arc wall of sleeve shaft, spiral plate one and spiral plate two structure are same and mutually abut;In the utility model, by electric push rod drive fixed column moves along transmission shaft axial direction, drive fixed strip and spiral plate two synchronous motion, to change the relative spacing of spiral plate one and spiral plate two, realize the continuous adjustment of screw pitch, reduce screw pitch can enhance the compression force of spiral to material, form "plug flow" transport, prevent caking and adhesion, increase screw pitch can reduce material sliding resistance, improve conveying efficiency, to reduce the additional energy consumption of motor speed frequent adjustment or the cumbersome of screw overall replacement.

Description

Technical Field

[0001] This utility model relates to the technical field of medium mineral powder production equipment, specifically a medium mineral powder screw feeder adjustment device. Background Technology

[0002] The screw feeder for medium mineral powder is a widely used powder material conveying equipment in industries such as metallurgy, chemical industry, and building materials. Its core function is to continuously and evenly convey medium mineral powder (such as iron ore powder, copper ore powder, etc.) from the inlet to the outlet through rotating screw blades (screw). The device is usually composed of components such as shell, drive shaft, screw blades, and drive motor. It has the advantages of simple structure, good sealing performance, and adjustable conveying capacity. It is suitable for material conveying scenarios in horizontal or slightly inclined environments.

[0003] In existing screw feeders, the screw pitch is fixed. However, the particle size, moisture content, viscosity, and other characteristics of middlings powder may fluctuate due to changes in its source or process conditions. If the screw pitch is too small, the material sliding resistance increases, reducing conveying efficiency. If the screw pitch is too large, the material may be scattered due to centrifugal force, causing leakage or inaccurate measurement. In particular, when the production line needs to increase or decrease output, screw feeders with fixed screw pitch generally adjust the conveying volume by changing the motor speed. However, excessively high speed may cause material segregation or equipment vibration, while excessively low speed will result in insufficient efficiency.

[0004] In view of the above, this application is hereby submitted. Utility Model Content

[0005] The purpose of this invention is to provide a screw feeder regulating device for medium mineral powder to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, this utility model provides a screw feeder adjustment device for medium mineral powder, including a housing and a drive shaft horizontally rotatably disposed therein. The axial direction of the drive shaft is consistent with the length direction of the housing. Multiple sleeve shafts with the same structure are coaxially sleeved on the outside of the drive shaft. A first screw plate and a second screw plate are fixed on the outer arc wall of the sleeve shaft. The first screw plate and the second screw plate have the same structure and abut against each other. Multiple fixing strips are fixed on the inner arc wall of the second screw plate in a ring array about the axial direction of the sleeve shaft. A fixing column is fixed at one end of the side wall of the fixing strip near the sleeve shaft along the axial direction of the sleeve shaft. The length direction of the fixing column is consistent with the radial direction of the sleeve shaft.

[0007] A sliding channel one is provided on the outer arc wall of the drive shaft at the position corresponding to the fixed bar, and a sliding channel two is provided on the outer arc wall of the sleeve shaft at the position corresponding to the fixed bar. The fixed bar slides in the sliding channel two, and the fixed post slides through the sliding channel two and slides in the sliding channel one. The ends of the multiple fixed posts that are close to each other are fixedly connected to each other. A storage channel is provided along the axial direction of the drive shaft. An electric push rod is provided on one side of the storage channel. The output end of the electric push rod extends into the storage channel and is rotatably connected to the multiple fixed posts.

[0008] Furthermore, the outer arc wall of the drive shaft is provided with a plurality of mounting grooves arranged in a ring array about its axial direction. The mounting grooves and the sliding channel are staggered and do not interfere with each other. A plurality of mounting strips are fixed on the inner arc wall of the sleeve shaft in a ring array about its axial direction. The plurality of mounting strips correspond one-to-one with the plurality of mounting grooves. The length direction of the mounting strips and the mounting grooves are consistent with the axial direction of the drive shaft. The mounting strips slide in the mounting grooves.

[0009] Furthermore, a transmission assembly is provided at one end of the transmission shaft near the electric push rod. The transmission assembly includes a transmission wheel one coaxially fixed on the transmission shaft, the transmission wheel one being located on the outside of the housing, and a transmission wheel two being provided on one radial side of the transmission wheel one. The outer sides of the transmission wheel one and the transmission wheel two are connected to the same transmission component. A motor is fixed to the transmission wheel two along its axial direction. The output end of the electric push rod is coaxially rotatably disposed through the transmission wheel one. An avoidance groove is provided on the side wall of the spiral plate one along the axial direction of the sleeve shaft at the position corresponding to the fixed strip. The length directions of the sliding channel one and the sliding channel two are both consistent with the axial direction of the sleeve shaft. A sealing mechanism is provided in the sliding channel two. The cross-section of the fixed column along the circumference of the sleeve shaft is rhomboid.

[0010] Furthermore, the sliding channel two is provided with storage grooves on both inner sidewalls along the circumferential direction of the sleeve axis. The sealing structure includes a sealing block slidably disposed in the storage groove. Multiple sealing blocks are provided in the storage groove on the same side, which are linearly and equally spaced along the length of the sliding channel two. The cross section of the sealing block along the circumferential direction of the sleeve axis is a right trapezoid. The inclined surface of the sealing block is set towards the inner wall of the storage groove. The sealing block is set towards the interior of the sliding channel two. Multiple sealing blocks in the storage grooves on different sides are staggered. Two sealing blocks at corresponding positions on different sides are rotate symmetrical about the midpoint of the line connecting the center points of the side walls that are close to each other.

[0011] Furthermore, a groove extending axially through the sleeve shaft is provided at the center of a corner away from the inclined surface of the sealing block. A second wedge block is fixed in the groove. Both ends of the fixing column along the axial direction of the sleeve shaft are fixed with a first wedge block. The ends of the first wedge block away from the fixing column are inclined surfaces on both sides along the circumference of the sleeve shaft. The first wedge block and the second wedge block slide against each other. A return spring is fixed on the plane away from the inclined surface of the sealing block. The end of the return spring away from the sealing block is fixed to the inner wall of the storage groove. A feeding hopper is provided on the top of the housing near the electric push rod. A feeding port is provided on the top of the housing corresponding to the position of the feeding hopper.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. The fixed column is driven to move axially along the transmission shaft by an electric push rod, which drives the fixed bar and the second spiral plate to move synchronously, thereby changing the relative distance between the first spiral plate and the second spiral plate, realizing continuous adjustment of the screw pitch. Reducing the screw pitch can enhance the compression force of the screw on the material, forming a "plug flow" conveying, preventing agglomeration and adhesion. Increasing the screw pitch can reduce the sliding resistance of the material, improve the conveying efficiency, and thus reduce the extra energy consumption of frequent motor speed adjustment or the cumbersome replacement of the entire screw.

[0014] 2. The sealing mechanism ensures the sealing of the sliding channel two during pitch adjustment, preventing material from entering the sleeve shaft from here. Through multiple sleeve shafts, the screw is disassembled into individual parts. When a part is damaged, only that part needs to be replaced and repaired. Attached Figure Description

[0015] Figure 1 A schematic diagram of the overall structure of a screw feeder regulating device for medium mineral powder;

[0016] Figure 2 This is a schematic diagram of a screw feeder regulating device for medium mineral powder in which multiple sleeve shafts are simultaneously sleeved on the outside of the drive shaft.

[0017] Figure 3 This is a schematic diagram showing the connection relationship between the sleeve shaft and the drive shaft in a screw feeder regulating device for medium mineral powder.

[0018] Figure 4 This is a schematic diagram of the structure of a screw feeder regulating device for medium mineral powder after adjustment of screw plate one and screw plate two;

[0019] Figure 5 This is a schematic diagram showing the connection relationship between the sleeve shaft and the spiral plate II in a screw feeder regulating device for medium mineral powder.

[0020] Figure 6 This is a schematic diagram of the structure of a fixed column and sealing block in a screw feeder regulating device for medium mineral powder.

[0021] In the picture:

[0022] 10. Housing; 101. Feed hopper; 11. Motor; 12. Transmission assembly; 13. Electric push rod;

[0023] 14. Drive shaft; 141. Mounting groove; 142. Sliding channel one; 143. Storage channel; 15. Sleeve shaft;

[0024] 151. Mounting strip; 152. Sliding channel two; 16. Spiral plate one; 161. Spiral plate two;

[0025] 20. Fixing strip; 21. Fixing post; 22. Wedge block one; 23. Sealing block; 24. Wedge block two. Detailed Implementation

[0026] 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.

[0027] Please see the appendix Figure 1 To be continued Figure 6 The present invention provides a screw feeder adjustment device for medium mineral powder: including a housing 10 and a drive shaft 14 horizontally rotatably disposed therein. The axial direction of the drive shaft 14 is consistent with the length direction of the housing 10. Multiple sleeve shafts 15 with the same structure are coaxially sleeved on the outer side of the drive shaft 14. A first screw plate 16 and a second screw plate 161 are fixed on the outer arc wall of the sleeve shaft 15. The first screw plate 16 and the second screw plate 161 have the same structure and abut against each other. Multiple fixing strips 20 are fixed on the inner arc wall of the second screw plate 161 in a ring array about the axial direction of the sleeve shaft 15. A fixing column 21 is fixed at one end of the side wall of the fixing strip 20 near the sleeve shaft 15 along the axial direction of the sleeve shaft 15. The length direction of the fixing column 21 is consistent with the radial direction of the sleeve shaft 15.

[0028] A sliding channel 142 is provided on the outer arc wall of the drive shaft 14 at the position corresponding to the fixed bar 20. A sliding channel 252 is provided on the outer arc wall of the sleeve shaft 15 at the position corresponding to the fixed bar 20. The fixed bar 20 slides in the sliding channel 252. The fixed post 21 slides through the sliding channel 252 and slides in the sliding channel 142. The ends of the multiple fixed posts 21 that are close to each other are fixedly connected to each other. A storage channel 143 is provided along the axial direction of the drive shaft 14. An electric push rod 13 is provided on one side of the storage channel 143. The output end of the electric push rod 13 extends into the storage channel 143 and is rotatably connected to the multiple fixed posts 21.

[0029] The outer arc wall of the drive shaft 14 is provided with a plurality of mounting grooves 141 arranged in a ring array about its axial direction. The mounting grooves 141 and the sliding channel 142 are staggered and do not interfere with each other. The inner arc wall of the sleeve shaft 15 is fixed with a plurality of mounting strips 151 arranged in a ring array about its axial direction. The plurality of mounting strips 151 correspond one-to-one with the plurality of mounting grooves 141. The length direction of the mounting strips 151 and the mounting grooves 141 are consistent with the axial direction of the drive shaft 14. The mounting strips 151 slide in the mounting grooves 141.

[0030] The transmission shaft 14 is provided with a transmission assembly 12 at one end near the electric push rod 13. The transmission assembly 12 includes a transmission wheel 1 coaxially fixed on the transmission shaft 14. The transmission wheel 1 is located on the outside of the housing 10. The transmission wheel 1 is provided with a transmission wheel 2 along its radial side. The outer sides of the transmission wheel 1 and the transmission wheel 2 are connected to the same transmission component. The transmission wheel 2 is fixed with a motor 11 along its axial direction. The output end of the electric push rod 13 is coaxially rotatably disposed through the transmission wheel 1.

[0031] The spiral plate 16 has a clearance groove on its side wall along the axial direction of the sleeve shaft 15, corresponding to the position of the fixing strip 20. The length directions of the sliding channel 142 and the sliding channel 252 are both consistent with the axial direction of the sleeve shaft 15. A sealing mechanism is provided in the sliding channel 252. The cross section of the fixing column 21 along the circumference of the sleeve shaft 15 is rhomboid.

[0032] It should be noted that the screw is divided into a drive shaft 14, multiple sleeve shafts 15, and spiral plates 16 and 161 fixed on the outer arc wall of the sleeve shafts 15. They are assembled by splicing to facilitate future maintenance and replacement.

[0033] When motor 11 starts, it drives transmission wheel 2 to rotate. Transmission wheel 2 drives transmission wheel 1 to rotate through transmission component. Transmission wheel 1 drives transmission shaft 14 to rotate. Since mounting strip 151 slides in mounting groove 141, when transmission shaft 14 rotates, it will drive sleeve shaft 15 to rotate together. Sleeve shaft 15 drives spiral plate 16 and spiral plate 161 to rotate, and starts to convey medium mineral powder. In one possible embodiment, transmission wheel 1 and transmission wheel 2 are pulleys and transmission component is belt.

[0034] When it is necessary to adjust the feed rate of medium mineral powder, the electric push rod 13 is activated. The output end of the electric push rod 13 moves within the placement channel 143, pushing multiple fixed columns 21 that are rotatably connected to it. The fixed columns 21 slide within the sliding channel 142, and at the same time drive the fixed strip 20 to slide within the sliding channel 252. Since the spiral plate 261 is connected to the sleeve shaft 15 through the fixed strip 20, the movement of the fixed strip 20 will drive the spiral plate 261 to move relative to the spiral plate 16, thereby changing the size of the spiral conveying channel formed by the spiral plate 16 and the spiral plate 261, and realizing the adjustment of the feed rate.

[0035] In the initial state, the first spiral plate 16 and the second spiral plate 161 are in close contact, that is, the overall pitch is at its maximum. When the second spiral plate 161 moves between two adjacent spiral plates 16, the pitch is at its minimum. Thus, without changing the speed of the motor 11, the speed of transporting materials can be changed by changing the pitch, and the conveying of materials of different qualities can be adapted.

[0036] Please see the appendix Figure 1 To be continued Figure 6 The present invention provides a technical solution: the sliding channel 2 152 is provided with a storage groove on both inner side walls along the circumference of the sleeve shaft 15, and the sealing structure includes a sealing block 23 slidably disposed in the storage groove. Multiple sealing blocks 23 are linearly and equally spaced along the length direction of the sliding channel 2 152 in the storage groove on the same side. The cross section of the sealing block 23 along the circumference of the sleeve shaft 15 is a right trapezoid.

[0037] The inclined surface of the sealing block 23 is set towards the inner wall of the storage groove, and the sealing block 23 is set towards the interior of the sliding channel 152. Multiple sealing blocks 23 located in the storage groove on different sides are staggered, and two sealing blocks 23 located on different sides and corresponding positions are rotate symmetrical about the midpoint of the line connecting the center points of the side walls that are close to each other.

[0038] The sealing block 23 has a groove extending through the axial direction of the sleeve shaft 15 at the center of a corner away from its inclined surface. A second wedge block 24 is fixed in the groove. Both ends of the fixing column 21 along the axial direction of the sleeve shaft 15 are fixed with a first wedge block 22. The ends of the first wedge block 22 away from the fixing column 21 are inclined on both sides along the circumference of the sleeve shaft 15. The first wedge block 22 and the second wedge block 24 slide against each other. A return spring is fixed on the plane of the sealing block 23 away from its inclined surface. The end of the return spring away from the sealing block 23 is fixed to the inner wall of the storage groove.

[0039] The top of the housing 10 is provided with a feeding hopper 101 on the side near the electric push rod 13, and a feeding port is provided on the top of the housing 10 corresponding to the position of the feeding hopper 101.

[0040] It should be noted that during adjustment, the fixed post 21 moves with the push of the electric push rod 13, and the wedge block 22 on it slides and abuts against the wedge block 24 on the sealing block 23, making it easier for the sealing block 23 to retract into the storage groove. Furthermore, the side length of the fixed post 21 is equal to the side length of the smallest right angle side of the sealing block 23, so the fixed post 21 can abut against the sealing block 23 tightly, thereby ensuring the sealing effect of the sliding channel 152.

[0041] Working principle:

[0042] Motor 11 drives transmission wheel 2 to rotate, which in turn causes transmission wheel 1 and transmission shaft 14 to rotate via transmission components. As mounting strip 151 slides in mounting groove 141, transmission shaft 14 drives sleeve shaft 15 to rotate, thereby causing spiral plate 16 and spiral plate 2 161 to rotate and transport mineral powder.

[0043] When the feed rate needs to be adjusted, the output end of the electric push rod 13 moves within the placement channel 143, pushing the fixed column 21 to slide within the sliding channel 142, which in turn drives the fixed bar 20 to slide within the sliding channel 252, causing the spiral plate 261 to move relative to the spiral plate 16, thus changing the size of the spiral conveying channel.

[0044] During adjustment, the wedge block 22 on the fixed column 21 slides and abuts against the wedge block 24 on the sealing block 23. The reset spring assists the sealing block 23 in resetting, ensuring the sealing of the sliding channel 152. The medium mineral powder enters the housing 10 from the feed hopper 101 through the feed port to start conveying.

Claims

1. A screw feeder regulating device for medium mineral powder, comprising a housing (10) and a drive shaft (14) horizontally rotatably disposed therein, wherein the axial direction of the drive shaft (14) is consistent with the length direction of the housing (10), and a plurality of identical sleeve shafts (15) are coaxially sleeved on the outer side of the drive shaft (14), characterized in that: Spiral plate one (16) and spiral plate two (161) are fixed on the outer arc wall of the sleeve shaft (15). Spiral plate one (16) and spiral plate two (161) have the same structure and abut against each other. Multiple fixing strips (20) are fixed on the inner arc wall of spiral plate two (161) in a ring array about the axial direction of the sleeve shaft (15). A fixing column (21) is fixed at one end of the side wall of the fixing strip (20) close to the sleeve shaft (15) along the axial direction of the sleeve shaft (15). The length direction of the fixing column (21) is consistent with the radial direction of the sleeve shaft (15). A sliding channel one (142) is provided on the outer arc wall of the drive shaft (14) at the position corresponding to the fixed strip (20), and a sliding channel two (152) is provided on the outer arc wall of the sleeve shaft (15) at the position corresponding to the fixed strip (20). The fixed strip (20) slides in the sliding channel two (152), and the fixed column (21) slides through the sliding channel two (152) and slides in the sliding channel one (142). The ends of the multiple fixed columns (21) that are close to each other are fixedly connected to each other. A storage channel (143) is provided along the axial direction of the drive shaft (14). An electric push rod (13) is provided on one side of the storage channel (143). The output end of the electric push rod (13) extends into the storage channel (143) and is rotatably connected to the multiple fixed columns (21).

2. The screw feeder regulating device for medium-strength mineral powder as described in claim 1, characterized in that: The outer arc wall of the drive shaft (14) is provided with a plurality of mounting grooves (141) arranged in a ring array about its axial direction. The mounting grooves (141) and the sliding channel (142) are staggered and do not interfere with each other. The inner arc wall of the sleeve shaft (15) is fixed with a plurality of mounting strips (151) arranged in a ring array about its axial direction. The plurality of mounting strips (151) correspond one-to-one with the plurality of mounting grooves (141). The length direction of the mounting strips (151) and the mounting grooves (141) are consistent with the axial direction of the drive shaft (14). The mounting strips (151) slide in the mounting grooves (141).

3. The screw feeder regulating device for medium-strength mineral powder as described in claim 1, characterized in that: The transmission shaft (14) is provided with a transmission assembly (12) at one end near the electric push rod (13). The transmission assembly (12) includes a transmission wheel one coaxially fixed on the transmission shaft (14). The transmission wheel one is located on the outside of the housing (10). The transmission wheel one is provided with a transmission wheel two along its radial side. The transmission wheel one and the transmission wheel two are connected to the same transmission component on their outer sides. The transmission wheel two is fixed with a motor (11) along its axial direction. The output end of the electric push rod (13) is coaxially rotated through the transmission wheel one.

4. The screw feeder regulating device for medium-strength mineral powder as described in claim 1, characterized in that: The spiral plate (16) has a clearance groove on the side wall of the sleeve shaft (15) at the position corresponding to the fixed strip (20). The length direction of the sliding channel (142) and the length direction of the sliding channel (152) are both consistent with the axial direction of the sleeve shaft (15). The sliding channel (152) is equipped with a sealing mechanism. The cross section of the fixed column (21) along the circumference of the sleeve shaft (15) is rhomboid.

5. The screw feeder regulating device for medium-strength mineral powder as described in claim 4, characterized in that: Suppose that the sliding channel two (152) has a storage groove on both inner side walls along the circumference of the sleeve shaft (15), and the sealing structure includes a sealing block (23) that is slidably disposed in the storage groove. Multiple sealing blocks (23) are linearly and equally spaced along the length direction of the sliding channel two (152) in the storage groove on the same side. The cross section of the sealing block (23) along the circumference of the sleeve shaft (15) is a right trapezoid.

6. The screw feeder regulating device for medium-strength mineral powder as described in claim 5, characterized in that: The inclined surface of the sealing block (23) is set towards the inner wall of the storage groove, and the sealing block (23) is set towards the interior of the sliding channel (152). Multiple sealing blocks (23) located in the storage groove on different sides are staggered, and two sealing blocks (23) located on different sides and corresponding positions are rotate symmetrical about the midpoint of the line connecting the center points of the side walls that are close to each other.

7. The screw feeder regulating device for medium-strength mineral powder as described in claim 5, characterized in that: The sealing block (23) has a groove at the center of a corner away from its inclined surface, which extends through the axial direction of the sleeve shaft (15). A second wedge block (24) is fixed in the groove. Both ends of the fixing column (21) along the axial direction of the sleeve shaft (15) are fixed with a first wedge block (22). The first wedge block (22) is inclined on both sides of the sleeve shaft (15) around the fixed column (21). The first wedge block (22) and the second wedge block (24) slide against each other. A return spring is fixed on the plane away from the inclined surface of the sealing block (23). The end of the return spring away from the sealing block (23) is fixed to the inner wall of the storage groove.

8. The screw feeder regulating device for medium-strength mineral powder as described in claim 1, characterized in that: The top of the housing (10) is provided with a feeding hopper (101) on the side near the electric push rod (13), and a feeding port is provided at the top of the housing (10) corresponding to the position of the feeding hopper (101).

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