Arch breaking type screw feeder

Abstract

The utility model relates to an arch-breaking type screw feeder which is provided with a barrel, a screw shaft is rotatably mounted in the barrel, a screw blade is arranged on the screw shaft, a feed bin is mounted on a feed pipe, a central shaft is coaxially arranged with the axis of the feed bin, an upper pressing ring is sleeved at the upper end of the central shaft, and a supporting ring is fixed at the bottom of the central shaft. The central shaft at the upper end of the upper pressing ring is sleeved with a pressing button, a check ring is fixed to the central shaft below the upper pressing ring, a spring is arranged between the upper pressing ring and the check ring, long connecting rods which are evenly distributed in the circumferential direction are hinged to the periphery of the upper pressing ring, short connecting rods which are evenly distributed in the circumferential direction are hinged to the periphery of the supporting ring, and the lower ends of the long connecting rods are hinged to the upper ends of the short connecting rods. The upper pressing ring is pushed to move downwards by manually pressing down the pressing button, so that the long connecting rod and the short connecting rod generate a pushing and pressing effect on materials, the arching phenomenon of the materials in the stock bin is effectively broken, the whole arching breaking process does not need extra power effect, continuous operation in the whole operation process is not needed, the structure is simple, and operation is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of material conveying, in particular to an arch-breaking type spiral feeder. Background Art

[0002] Screw feeders are widely used in various industrial sectors. When the screw feeder is running, the material entering from the feed silo is conveyed by the screw to the discharge port.

[0003] When the screw feeder is conveying some fine particles or viscous granular materials, during the feeding process from the silo, arching phenomenon often occurs on the upper part of the material accumulated in the silo, causing the feeder to feed unsmoothly and affecting the material transmission efficiency.

[0004] Some current screw feeders are also equipped with corresponding arch-breaking mechanisms to prevent arch formation in the silo, but such arch-breaking mechanisms usually require additional power sources, which increases the complexity of the mechanism, and the arch-breaking mechanism is in a long-term operating state, which increases the energy consumption cost. Utility Model Content

[0005] The technical problem to be solved by the utility model is: in order to overcome the deficiencies in the prior art, the utility model provides an arch-breaking screw feeder which has a simple structure, is easy to operate and can break the arch of materials without additional power.

[0006] The technical solution adopted by the utility model to solve the technical problem is: an arch-breaking screw feeder, comprising a horizontally arranged cylinder, a spiral shaft rotatably installed in the cylinder, a spiral blade being arranged on the spiral shaft, a feed pipe being installed on the upper end surface of one end of the cylinder, a discharge pipe being fixedly connected to the lower end surface of the other end of the cylinder, a silo being installed on the feed pipe, a cover plate being installed on the upper end surface of the silo, a central shaft being coaxial with the axis of the silo, an upper pressure ring being hollowly sleeved on the upper end of the central shaft, a supporting ring being fixed on the bottom of the central shaft, a pressing button being sleeved on the central shaft at the upper end of the upper pressure ring, a retaining ring being fixed on the central shaft below the upper pressure ring, a spring being arranged between the upper pressure ring and the retaining ring, a circumferentially uniformly distributed long connecting rod being hinged on the outer periphery of the upper pressure ring, a circumferentially uniformly distributed short connecting rod being hinged on the outer periphery of the supporting ring, and the lower end of the long connecting rod being hinged to the upper end of the short connecting rod.

[0007] The push button comprises a push head and a push tube, the lower end of the push tube is attached to the surface of the upper pressure ring, and the push head protrudes out of the cover plate.

[0008] A machine base is installed below the cylinder, a left end cover is fixed at one end of the machine base, and a right end cover is fixed at the other end of the machine base. The screw shaft is rotatably supported between the left end cover and the right end cover, and a stepper motor connected to the screw shaft is installed on the machine base on the right end cover side.

[0009] On the inner wall of the cylinder on one side of the discharge pipe, a material distribution impeller is fixed, and the spiral shaft is in clearance fit with the central hole of the material distribution impeller.

[0010] A support frame is installed on the machine base, and the upper end of the support frame surrounds and supports the middle part of the silo.

[0011] The beneficial effects of the present utility model are as follows: By manually pressing the pressing button to push the upper pressing ring downward, the long connecting rod and the short connecting rod generate a pushing pressure on the material, effectively breaking the arching phenomenon of the material in the silo. The whole arch-breaking process does not require additional power and does not need to run continuously during the entire operation process. The structure is simple and the operation is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0013] Figure 1 is a schematic structural diagram of the present utility model.

[0014] Figure 2 is a schematic internal structure diagram of the feeder after removing the cylinder.

[0015] Figure 3 is a schematic structural diagram of the pressing mechanism of the present utility model.

[0016] In the figure: 1. Cylinder, 2. Spiral shaft, 3. Spiral blade, 4. Feed pipe, 5. Discharge pipe, 6. Silo, 7. Cover plate, 8. Central shaft, 9. Upper pressing ring, 10. Support ring, 11. Pressing button, 11-1. Pressing head, 11-2. Pressing pipe, 12. Retaining ring, 13. Spring, 14. Long connecting rod, 15. Short connecting rod, 16. Machine base, 17. Left end cover, 18. Right end cover, 19. Stepper motor, 20. Material distribution impeller, 21. Support frame, 22. Cross bar. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The present utility model will now be further described in detail with reference to the drawings. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present utility model in a schematic manner, so they only show the components related to the present utility model.

[0018] As Figure 1 , Figure 2 shown, a kind of arch-breaking spiral feeder has a machine base 16, and the machine base 16 includes a base and columns respectively fixed at the left and right ends of the base. The upper ends of the columns are fixed with mounting plates. The mounting plate at the upper end of the left column is fixed with a left end cover 17, and the mounting plate at the upper end of the right column is fixed with a right end cover 18 and a stepper motor 19.

[0019] A cylinder body 1 is horizontally arranged between the left end cover 17 and the right end cover 18. Both ends of the cylinder body 1 are fixedly connected to the left end cover 17 and the right end cover 18 through flanges respectively. A spiral shaft 2 is rotatably installed in the cylinder body 1. The spiral shaft 2 is rotatably supported between the left end cover 17 and the right end cover 18. The right end of the spiral shaft 2 is drivingly connected to a stepping motor 19. A spiral blade 3 for pushing materials is provided on the spiral shaft 2.

[0020] A material distributing impeller 20 is fixed on the inner wall of the cylinder body 1 on one side of the discharge pipe 5. The spiral shaft 2 is in clearance fit with the central hole of the material distributing impeller 20. The material distributing impeller 20 changes the spiral movement of the materials into a linear movement to ensure quantitative stability.

[0021] A feed pipe 4 is installed on the upper end face of the right end of the cylinder body 1. A discharge pipe 5 is fixedly connected to the lower end face of the left end of the cylinder body 1. A storage bin 6 is installed on the feed pipe 4. A cover plate 7 is installed on the upper end face of the storage bin 6. A support frame 21 is installed on the machine base 16. The middle part of the support frame 21 supports the bottom of the cylinder body 1, and the upper end of the support frame 21 surrounds and supports the middle part of the storage bin 6.

[0022] A pressing mechanism for preventing the materials in the storage bin 6 from arching is installed in the storage bin 6. As Figure 3 shown, the pressing mechanism includes a central shaft 8 arranged coaxially with the axis of the storage bin 6. A cross bar 22 is fixed to the bottom of the storage bin 6. The bottom end of the central shaft 8 is fixed to the cross bar 22. The upper end of the central shaft 8 is sleeved with an upper pressing ring 9. A support ring 10 is fixed to the bottom of the central shaft 8. A retaining ring 12 is fixed to the central shaft 8 between the upper pressing ring 9 and the retaining ring 12. A spring 13 is arranged between the upper pressing ring 9 and the retaining ring 12. The outer circumference of the upper pressing ring 9 is hinged with circumferentially evenly distributed long connecting rods 14. The outer circumference of the support ring 10 is hinged with circumferentially evenly distributed short connecting rods 15. The lower end of the long connecting rod 14 is hinged with the upper end of the short connecting rod 15.

[0023] A pressing button 11 is sleeved on the central shaft 8 above the upper pressing ring 9. The pressing button 11 includes a pressing head 11-1 and a pressing tube 11-2. The lower end of the pressing tube 11-2 fits on the surface of the upper pressing ring 9, and the pressing head 11-1 protrudes outside the cover plate 7.

[0024] During the operation of the feeder, when arching occurs in the storage bin 6, the operator only needs to manually press down the pressing button 11. The pressing tube 11-2 pushes the upper pressing ring 9 to move downward. The downward movement of the upper pressing ring 9 causes the long connecting rods 14 to expand outwards and the short connecting rods 15 to swing downward, thereby generating a pushing pressure on the materials. In this way, a destructive force can be generated on the arched materials to effectively break the arching of the materials in the storage bin 6. When the pressing button 11 is released, the upper pressing ring 9 moves upward and resets under the action of the spring 13. The entire arch breaking process does not require additional power and does not need to operate continuously during the entire operation process. The structure is simple and the operation is convenient.

[0025] Inspired by the above-described ideal embodiments of the present utility model, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of the present utility model. The technical scope of the present utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A broken arch type screw feeder, comprising a horizontally arranged barrel (1), a screw shaft (2) rotatably mounted in the barrel (1), a screw shaft (2) provided with a screw blade (3), a feed pipe (4) mounted on the upper end surface of one end of the barrel (1), and a discharge pipe (5) fixedly connected to the lower end surface of the other end of the barrel (1), wherein: A silo (6) is installed on the feed pipe (4), a cover plate (7) is installed on the upper end surface of the silo (6), a central shaft (8) is coaxially arranged with the axis of the silo (6), an upper pressure ring (9) is hollowly sleeved on the upper end of the central shaft (8), a support ring (10) is fixed on the bottom of the central shaft (8), a pressing button (11) is sleeved on the central shaft (8) at the upper end of the upper pressure ring (9), a retaining ring (12) is fixed on the central shaft (8) below the upper pressure ring (9), a spring (13) is arranged between the upper pressure ring (9) and the retaining ring (12), the outer periphery of the upper pressure ring (9) is hinged with a circumferentially uniformly distributed long connecting rod (14), the outer periphery of the support ring (10) is hinged with a circumferentially uniformly distributed short connecting rod (15), and the lower end of the long connecting rod (14) is hinged with the upper end of the short connecting rod (15).

2. The arch-breaking screw feeder according to claim 1, characterized in that: The push button (11) comprises a push head (11-1) and a push tube (11-2), the lower end of the push tube (11-2) is attached to the surface of the upper pressing ring (9), and the push head (11-1) protrudes out of the cover plate (7).

3. The arch-breaking screw feeder according to claim 1, characterized in that: A base (16) is installed below the cylinder (1), a left end cover (17) is fixed to one end of the base (16), and a right end cover (18) is fixed to the other end of the base (16), the screw shaft (2) is rotatably supported between the left end cover (17) and the right end cover (18), and a stepping motor (19) drivingly connected to the screw shaft (2) is installed on the base (16) on the right end cover (18) side.

4. The arch-breaking screw feeder according to claim 3, characterized in that: A material distribution impeller (20) is fixed on the inner wall of the cylinder (1) on one side of the discharge pipe (5), and the spiral shaft (2) is clearance-matched with the center hole of the material distribution impeller (20).

5. The arch-breaking screw feeder according to claim 3, characterized in that: A support frame (21) is installed on the machine base (16), and the upper end of the support frame (21) is supported around the middle of the silo (6).

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