Feeder capable of preventing bridging and extrusion

Abstract

The utility model discloses a feeder capable of preventing bridging and extrusion. The feeder comprises a feeding bin bottom and a stirring feeding disc. The feeding bin bottom comprises a bottom plate, an inner shell and an outer shell; an annular discharging channel is formed between the inner shell and the outer shell; a discharge hole is formed in the bottom plate opposite to the discharge channel; the inner shell comprises an upper shell and a material thickness adjusting ring; the material thickness adjusting ring is hermetically arranged at the bottom of the upper shell, and the bottom surface height can be adjusted; the stirring feeding disc comprises a rotary connecting ring, a stirring shaft, stirring blades and a plurality of partition plates; the multiple partition plates are evenly distributed at the bottom of the inner wall face of the rotary connecting ring in the circumferential direction, each partition plate is distributed in the radial direction of the rotary connecting ring, and the radial length of each partition plate is not smaller than the radial thickness of the discharging channel. By means of the bridge breaking device, bridge breaking of easily-bridged materials can be achieved, the easily-bridged materials are prevented from being extruded and broken in the feeding process, and the wide feeding speed range can be taken into account.

Description

Technical Field

[0001] This utility model relates to a material feeding device, and more particularly to a feeder that can prevent bridging and compression. Background Technology

[0002] Materials prone to bridging, such as powdery materials with high moisture content or brittle flaky materials, are susceptible to bridging phenomena like jamming during conveying and feeding. Currently, conveying and feeding equipment for easily bridging materials mainly includes bin bottom bridging breakers and screw conveyors. The bin bottom bridging breaker is located at the bottom of the bin, while the screw conveyor is located at the bottom of the bin bottom bridging breaker, used to meter and transport the material to the point of use. Currently, bin bottom bridging breakers mainly come in two forms:

[0003] Method 1: The bottom bridge breaking machine is a vibrating bin bottom. The vibrating bin bottom has an inverted cone and can vibrate, thus breaking the bridge through vibration.

[0004] Method 2: The bottom silo bridge breaking machine is a bottom silo rotary discharge device. The bottom silo rotary discharge device has a flat bottom structure and is equipped with horizontal stirring blades. By rotating the horizontal stirring blades, the material at the bottom of the silo is broken up.

[0005] The aforementioned conveying and feeding equipment still has the following shortcomings in the actual conveying process of easily bridging materials, and needs to be improved:

[0006] 1. The bridge-breaking effect was not good.

[0007] When the silo bottom bridging machine is a vibrating silo bottom, the vibration of the silo bottom will cause some materials to become more compacted with each vibration, failing to achieve the effect of bridging and aiding flow. When the silo bottom bridging machine is a bottom silo rotary discharge device, if the screw feed speed of the screw conveyor cannot send the material discharged from the rotary discharge device away in time, the material will be repeatedly stirred by the horizontal stirring blades in the rotary discharge device, resulting in breakage. The screw itself relies on the horizontal stirring blades and the squeezing friction between the cylinder and the material to achieve conveying, which is not conducive to bridging.

[0008] 2. Narrow feeding speed range

[0009] For the same material, users may have varying requirements for feeding speeds. For example, when feeding BPA, there may be multiple feeding speed ranges such as 7-8 tons / hour, 10-20 tons / hour, and 30-40 tons / hour. However, with existing screw conveyors, the feeding amount per revolution is fixed once the screw is manufactured. The feeding speed can only be adjusted by changing the speed of the screw motor. Since the stable output frequency of the screw motor is between 20Hz and 50Hz, the adjustment range is narrow. Therefore, the screw motor speed can only be adjusted between 40% and 100% of V, where V is the rated speed of the screw motor. Consequently, to match multiple feeding speed ranges (7-8 tons / hour, 10-20 tons / hour, and 30-40 tons / hour), multiple feeding devices need to be manufactured. Utility Model Content

[0010] The technical problem to be solved by this utility model is to provide a feeder that can prevent bridging and compression, which is in response to the shortcomings of the prior art. This feeder can break up bridging materials, prevent easily broken materials from being crushed by compression during the feeding process, and can also take into account a wide range of feeding speeds.

[0011] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0012] A feeder that prevents bridging and compression includes a feed bin bottom and a mixing feed pan.

[0013] The bottom of the feeding hopper includes a bottom plate, an inner shell, and an outer shell; the bottom plate is horizontally arranged, and the inner shell and outer shell are coaxially arranged from the inside to the outside on the top outer edge of the bottom plate; an annular discharge channel is formed between the inner shell and the outer shell; a discharge port is opened on the bottom plate directly opposite the discharge channel.

[0014] The inner housing includes an upper housing and a material thickness adjustment ring; the material thickness adjustment ring is sealed at the bottom of the upper housing, and the height of the bottom surface can be adjusted.

[0015] The mixing feed pan includes a rotating connecting ring, a mixing shaft, mixing blades, and several baffles.

[0016] The rotating connecting ring is slidably installed on the bottom inner wall of the outer casing.

[0017] The stirring shaft is coaxially arranged at the bottom center and can rotate under the drive of the stirring motor. The stirring shaft is connected to the rotating connecting ring through the stirring blades arranged radially, so that the stirring motor drives the stirring shaft, stirring blades and rotating connecting ring to rotate synchronously.

[0018] Several partitions are evenly distributed circumferentially on the bottom of the inner wall of the rotating connecting ring, and each partition is arranged radially along the rotating connecting ring, and the radial length of each partition is not less than the radial thickness of the discharge channel.

[0019] Each partition has chamfered edges on both sides at the connection point between it and the rotating connecting ring.

[0020] The radial length of each chamfer is not less than 20mm.

[0021] The stirring blades are four in number and arranged in a cross shape, with each blade located between two partitions.

[0022] Each stirring blade has an L-shaped longitudinal section and includes a vertical connecting plate and a horizontal connecting plate; the vertical connecting plate is located on the line of symmetry between the two partitions.

[0023] The height and width of each agitator blade gradually decrease from the agitation axis outwards.

[0024] The inner diameter of the inner shell is not less than 1m.

[0025] The stirring motor is a variable frequency motor, and the output speed range of the stirring motor is 40% to 100% of V'; where V' is the rated speed of the stirring motor.

[0026] The top of the material thickness adjustment ring is detachably and slidably mounted on the bottom outer wall of the upper housing via several adjusting screws.

[0027] The bottom end of the stirring shaft extends from the base plate and is connected to the stirring motor below; the stirring shaft and the base plate are connected by an airtight seal.

[0028] This utility model has the following beneficial effects:

[0029] 1. In this application, the bottom height of the material thickness adjustment ring is adjustable. The material flowing out of the silo passes through the inner shell with a relatively narrow cross-section and enters the bottom of the outer shell with a relatively wide cross-section after passing through the bottom surface of the material thickness adjustment ring. The mixing feed plate located at the top of the bottom plate agitates and evenly distributes the material on the top surface of the bottom plate between two adjacent partitions in the discharge channel. Due to the rotation of the mixing feed plate, the partitions evenly push the material in the discharge channel to the discharge port for uniform feeding. During this process, the cross-section of the inner and outer shells adopts a structure that is narrow at the top and wide at the bottom, which makes the material loose and avoids the crushing and compaction caused by the squeezing and friction of the material during the rotation of the mixing feed plate, thus achieving effective bridging. In addition, the inner diameter of the inner shell is not less than 1m, which further effectively prevents bridging in the silo.

[0030] 2. In this application, since the bottom height of the material thickness adjustment ring can be adjusted, the material thickness entering the discharge channel can be adjusted by adjusting the bottom height of the material thickness adjustment ring. Combined with the speed of the mixing motor, the range of feeding speed adjustment is increased, so that one feeder can achieve the universal matching requirements of multiple feeding speed ranges such as 7-8 tons / hour, 10-20 tons / hour and 30-40 tons / hour.

[0031] 3. In this application, the baffles are evenly distributed along the bottom of the inner wall of the rotating connecting ring, thus controlling the uniformity of feeding and ensuring that the bridge breaking and mixing are at the same speed as the feeding, avoiding repeated mixing of easily breakable materials. At the same time, one device can realize both bridge breaking and feeding functions. Attached Figure Description

[0032] Figure 1 A simulated half-sectional view of a feeder that can prevent bridging and compression according to this application is shown.

[0033] Figure 2 A three-dimensional simulation diagram of the mixing feed plate in this application is shown.

[0034] Figure 3 This image shows a partial cross-sectional view of a feeder that prevents bridging and compression according to this application.

[0035] Figure 4 A line drawing of the mixing feed pan in this application is shown.

[0036] Figure 5 This paper shows a schematic diagram of the structure after the height of the material thickness adjustment ring in this application has decreased.

[0037] Figure 6 This paper shows a schematic diagram of the structure after the height of the material thickness adjustment ring in this application has increased.

[0038] Among them are:

[0039] 10. Base plate; 11. Discharge port;

[0040] 20. Upper shell;

[0041] 30. Material thickness adjustment ring; 31. Adjusting screw;

[0042] 40. Outer shell;

[0043] 50. Mixing and feeding tray;

[0044] 51. Rotary connecting ring; 511. Stirring motor; 512. Air seal;

[0045] 52. Stirring shaft;

[0046] 53. Agitator blades; 531. Vertical connecting plate; 532. Horizontal connecting plate;

[0047] 54. Partition; 541. Chamfer. Detailed Implementation

[0048] The present invention will now be described in further detail with reference to the accompanying drawings and specific preferred embodiments.

[0049] In the description of this utility model, it should be understood that the terms "left side," "right side," "upper part," "lower part," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. "First," "second," etc., do not indicate the importance of the components, and therefore should not be construed as a limitation of this utility model. The specific dimensions used in this embodiment are only for illustrating the technical solution and do not limit the protection scope of this utility model.

[0050] like Figure 1 and Figure 3 As shown, a feeder that can prevent bridging and compression includes a feed bin bottom and a mixing feed pan 50.

[0051] The bottom of the feeding hopper includes a bottom plate 10, an inner shell and an outer shell 40; wherein, the bottom plate is arranged horizontally, and the inner shell and the outer shell are arranged coaxially from the inside to the outside on the top outer edge of the bottom plate; an annular discharge channel is formed between the inner shell and the outer shell; a discharge port 11 is opened on the bottom plate directly opposite the discharge channel.

[0052] The inner shell includes an upper shell 20 and a material thickness adjustment ring 30. The inner diameter of the inner shell is not less than 1m, that is, the inner diameter of both the upper shell and the material thickness adjustment ring is not less than 1m. In this embodiment, it is preferably 1.1m. The large diameter can adapt to a large feeding speed and effectively avoid bridging of the hopper.

[0053] The aforementioned material thickness adjustment ring is sealed at the bottom of the upper housing, and the bottom height is adjustable. A schematic diagram showing the lifting and lowering process is provided. Figure 5 and Figure 6 As shown. In this embodiment, the top of the material thickness adjustment ring is preferably detachably and slidably mounted on the bottom outer wall of the upper housing via several adjusting screws, so that the height adjustment of the material thickness adjustment ring has no effect on the material in the inner housing.

[0054] like Figure 2 and Figure 4 As shown, the mixing feed plate includes a rotating connecting ring 51, a mixing shaft 52, a mixing blade 53, and several partitions 54.

[0055] The rotating connecting ring is located on the bottom inner wall surface of the outer casing and forms a sliding pair with the bottom inner wall surface of the outer casing.

[0056] The stirring shaft is coaxially arranged at the bottom center. In this embodiment, the bottom end of the stirring shaft preferably extends out from the bottom plate and is connected to the stirring motor 511 below. The stirring shaft and the bottom plate are preferably connected by an air seal 512.

[0057] The stirring shaft is connected to the rotating connecting ring via stirring blades arranged radially. In this embodiment, there are four stirring blades arranged in a cross shape. The longitudinal section of each stirring blade is preferably L-shaped and includes a vertical connecting plate 531 and a horizontal connecting plate 532.

[0058] Furthermore, the height and width of each agitator blade gradually decrease from the agitator shaft outwards. That is, the height of the vertical connecting plate and the width of the horizontal connecting plate gradually decrease from the agitator shaft outwards. This ensures the connection strength while minimizing the impact on the discharge speed and uniformity.

[0059] The rotation of the aforementioned stirring motor will drive the stirring shaft, stirring blades, all the baffles described below, and the rotating connecting ring to rotate synchronously. The stirring motor is preferably a variable frequency motor, with an output speed range of 40% to 100% V'; where V' is the rated speed of the stirring motor. In this embodiment, the output speed of the stirring motor is preferably set between 2 and 10 rpm. Because the height of the bottom surface of the material thickness adjustment ring can be raised and lowered, the stirring motor can achieve a large feeding speed at extremely low speeds, effectively protecting fragile materials.

[0060] Several of the aforementioned partitions are evenly distributed circumferentially on the bottom of the inner wall of the rotating connecting ring, and each partition is arranged radially along the rotating connecting ring, and the radial length is not less than the radial thickness of the discharge channel. That is, the inner end of each partition extends into the inner shell from below the material thickness adjustment ring.

[0061] Furthermore, each partition and the rotating connecting ring are provided with chamfers 541 on both sides, and the radial length of each chamfer is preferably not less than 20mm, so as to effectively avoid the problem of material clamping in dead corners.

[0062] Furthermore, each agitator blade is located between two partitions, with the vertical connecting plate positioned on the line of symmetry between the two partitions. Alternatively, the agitator blades can also employ other structural forms, such as being connected to the partitions.

[0063] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and all such equivalent transformations fall within the protection scope of the present invention.

Claims

1. A feeder capable of preventing bridging and compression, characterized in that: Including the bottom of the feed hopper and the mixing feed tray; The bottom of the feeding hopper includes a bottom plate, an inner shell, and an outer shell; the bottom plate is horizontally arranged, and the inner shell and outer shell are coaxially arranged from the inside to the outside on the top outer edge of the bottom plate; an annular discharge channel is formed between the inner shell and the outer shell; a discharge port is opened on the bottom plate directly opposite the discharge channel; The inner shell includes an upper shell and a material thickness adjustment ring; the material thickness adjustment ring is sealed at the bottom of the upper shell, and the bottom height can be adjusted; the mixing feed plate includes a rotating connecting ring, a mixing shaft, mixing blades, and several partitions; The rotating connecting ring is slidably mounted on the bottom inner wall surface of the outer casing; The stirring shaft is coaxially arranged at the bottom center and can rotate under the drive of the stirring motor. The stirring shaft is connected to the rotating connecting ring through stirring blades arranged radially, so that the stirring motor drives the stirring shaft, stirring blades and rotating connecting ring to rotate synchronously. Several baffles are evenly arranged on the bottom of the inner wall of the rotating connecting ring in the circumferential direction, and each baffle is arranged radially along the rotating connecting ring, and the radial length of each baffle is not less than the radial thickness of the discharge channel.

2. The feeder capable of preventing bridging and compression according to claim 1, characterized in that: Each partition has chamfered edges on both sides of the connection between it and the rotating connecting ring.

3. The feeder capable of preventing bridging and compression according to claim 2, characterized in that: The radial length of each chamfer is not less than 20mm.

4. The feeder capable of preventing bridging and compression according to claim 1, characterized in that: The stirring blades are four in number and arranged in a cross shape, with each blade located between two partitions.

5. The feeder capable of preventing bridging and compression according to claim 4, characterized in that: Each stirring blade has an L-shaped longitudinal section and includes a vertical connecting plate and a horizontal connecting plate; the vertical connecting plate is located on the line of symmetry between the two partitions.

6. The feeder capable of preventing bridging and compression according to claim 4 or 5, characterized in that: The height and width of each agitator blade gradually decrease from the agitation axis outwards.

7. The feeder capable of preventing bridging and compression according to claim 1, characterized in that: The inner diameter of the inner shell is not less than 1m.

8. The feeder capable of preventing bridging and compression according to claim 1, characterized in that: The stirring motor is a variable frequency motor, and the output speed range of the stirring motor is 40% to 100% of V'; where V' is the rated speed of the stirring motor.

9. The feeder capable of preventing bridging and compression according to claim 1, characterized in that: The top of the material thickness adjustment ring is detachably and slidably mounted on the bottom outer wall of the upper housing via several adjusting screws.

10. The feeder capable of preventing bridging and compression according to claim 1, characterized in that: The bottom end of the stirring shaft extends from the base plate and is connected to the stirring motor below; the stirring shaft and the base plate are connected by an airtight seal.

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