Pressing-type discharging device for flat-bottom material storage bin

Abstract

A discharging device for a flat-bottom material storage bin, said device consisting of a bin bottom discharging channel, a chevron baffle (1) on the channel, a slide frame (4) at the bin bottom, and a valve for blocking the channel. A plurality of slide rails (2) are arranged at the lower portion of the chevron baffle (1), and follower baffles (3) are installed on the slide rails (2) below the chevron baffle (1). When the slide frame (4) slides, the slide frame (4) pushes materials, and then the materials push the follower baffles (3); when moving to an extreme position on the opposite side, each follower baffle (3) will stop and thus close the opening at said side; at this time, the slide frame (4) continues to push the materials to move, and, due to the space that is essentially closed on the front, top, left and right sides, the pushing of the slide frame (4) will generate a strong pressing force, thereby pressing the materials out downward. Thus, the original gravity discharging mode is converted into a pressing discharging mode, thereby solving the problem of clogging.

Description

Flat-bottomed storage silo extrusion feeding device Technical Field

[0001] This invention relates to an improvement on a material discharge device for a flat-bottomed storage silo. The material discharge device is a mechanism installed inside a flat-bottomed storage silo that allows material to be discharged from the bottom of the silo in a controlled manner. Background Technology

[0002] Currently, there are two main structural forms of unloading devices used in flat-bottomed storage silos. One type consists of a hydraulically driven carriage and a unloading groove at the bottom of the silo, with a herringbone baffle covering the groove. The carriage slides back and forth at the bottom of the silo, pushing the material inside to the top of the groove, where it is then discharged by gravity – this is known as gravity unloading. If the material viscosity is low, the entire process can be completed smoothly. However, in practice, it is often necessary to handle materials with high or even very high viscosity. These high-viscosity materials tend to adhere, clump, and stagnate inside the carriage and groove, clogging the unloading channel, leading to uncontrolled unloading or even unloading interruption, severely impacting production operations.

[0003] Another structure eliminates the herringbone baffle from the previous one, replacing it with a long, narrow gate valve that completely blocks the material discharge groove. Its advantage is that when multiple grooves exist within the silo, the gate valve can isolate one or more grooves from the system without affecting the discharge from other grooves, allowing for independent control of the discharge rate. However, in practical applications, because the internal channels of the gate valve are narrow and dispersed, it is more prone to clogging than the previous structure, making it counterproductive. Technical issues

[0004] Existing technical solutions all use gravity feeding mode, which often causes blockage when handling high-viscosity or easily caking materials, resulting in loss of control over the feeding amount or even interruption of feeding. Technical solutions

[0005] This invention addresses the drawbacks of the two aforementioned structures, which are prone to clogging. While retaining the slide (4), herringbone baffle (1), and slide gate valve (5), it adds a follower baffle (3), which is installed on the slide rail (2) below the herringbone baffle. When the slide slides, it pushes the material, which in turn pushes the follower baffle. When the follower baffle reaches its limit position on the opposite side, it stops and closes the gap on that side. The slide then continues to push the material forward. Facing a space that is essentially closed in the front, top, and left and right sides, the slide's pushing action generates a strong squeezing force, causing the material to be squeezed downwards, and vice versa. In this way, the original gravity feeding mode is transformed into a squeezing feeding mode, thus completely solving the clogging problem. The improved storage silo can not only handle solid or semi-solid materials of various viscosities but also achieves essentially linear feeding control, greatly benefiting the automation level of related systems. The specific technical solution is as follows:

[0006] First, a set of slide rails is installed perpendicular to the material discharge groove at the lower part of the herringbone baffle. Then, a set of baffles (called "following baffles" because they can slide freely along the slide rails as the carriage moves) is installed on the slide rails via ring-shaped hangers. The direction of the following baffles is along the direction of the material discharge groove. The number of following baffles and slide rails depends on the number of carriage frame holes; each carriage frame hole corresponds to one following baffle, and one following baffle corresponds to two or more slide rails. The cross-section of the slide rails can be of any shape. Self-lubricating bearings (blades) or sliding plates can be added to the slide rails or the ring-shaped hangers on the following baffles to reduce wear and extend service life. Telescopic protective covers can also be installed on the slide rails (on both sides of the following baffles) to reduce wear by adding lubricating oil inside the protective covers. In addition, the herringbone baffles with following baffles are equipped with lifting mechanisms at both ends for raising, lowering, and fixing the herringbone baffles. Once a bottom screw conveyor (6) needs to be isolated from the system, the herringbone baffle above the screw conveyor can be raised to a certain height, so that the follower baffle can be removed from the working area and the slide gate valve can be closed to avoid damage to the extrusion components. Second, the original slide gate valve achieved opening control by changing the overlapping position of two perforated elongated valve plates. The material passage cross-sectional area only accounts for less than 50% of the total cross-sectional area of ​​the entire valve core. In the extrusion feeding mode, this structure will bring great resistance, put a greater burden on the hydraulic system, and also cause unnecessary power consumption. Therefore, this solution has made a significant improvement to the valve. Because the valve core of the new valve is composed of a hinged valve plate, the opening control is completed by folding, so it is renamed a folded plate valve. The new valve only retains one perforated elongated valve plate C (12), and several valve holes are arranged on the valve plate C. The specific number depends on the site conditions. The spacing between the valve holes is very small, and each valve hole is equipped with an independent folded valve core (when the folded plate valve is fully open, the material passage cross-sectional area accounts for more than 90% of the total cross-sectional area of ​​the entire valve core). The valve core consists of two hinged plates, A (10) and B (9), with plate B having a length of L. Plate A is longer than plate B. One side of plate B is hinged to plate A, and the other side is hinged to plate C. A pin sleeve (11) is installed on plate A at a distance L from the connection point of plates A and B to the other side, with a pin passing through it and both ends fixed to the guide rail. When plate C moves to the left in Figure 6, the pin restricts the movement of plates A and B to the left, causing plates A and B to fold up at the middle hinge, fully opening the valve orifice. When plate C moves to the right in Figure 6, the previously folded plates A and B unfold and seal the valve orifice. Of course, plate A can also be designed to be the same length as plate B. Beneficial effects

[0007] The original gravity feeding mode was transformed into an extrusion feeding mode, thus completely solving the clogging problem. The improved storage silo can not only handle solid or semi-solid materials of various viscosities and properties, but also basically achieves linear and precise feeding control, which is of great benefit to improving the automation level of related systems. Attached Figure Description

[0008] Figure 1 is a cross-sectional view of the material unloading device of the flat-bottomed storage silo.

[0009] Second, Figure 2 is a schematic diagram of a herringbone baffle with only the slide rail installed and a separate follower baffle.

[0010] Third, Figure 6 is a top view of the baffle valve in the closed state.

[0011] Fourth, Figure 5 is a cross-sectional view of section AA in Figure 6.

[0012] Fifth, Figure 4 is a top view of the baffle valve in the open state.

[0013] 6. Figure 3 is a cross-sectional view of section BB in Figure 4.

[0014] VII. Part Number Description: (1) Herringbone baffle, (2) slide rail, (3) follower baffle, (4) carriage, (5) slide valve (later changed to folding valve), (6) bottom screw conveyor, (7) upper and lower guide rails of folding valve, (8) hinge, (9) core plate B, (10) core plate A, (11) pin sleeve (the dotted part is the pin), (12) valve plate C, (13) polymer plate (used to reduce friction when the valve plate C slides in the guide rail), (14) pin. The best embodiment of the present invention

[0015] Exclusive implementation license. Modes for Carrying Out the Invention

[0016] Ordinary implementation license. Industrial Applicability

[0017] First, it completely solves the problem of material blockage in solid silos at the source, making automated production of high-viscosity materials possible. Second, it basically achieves linear and precise control of the material feed rate in solid silos; the higher the viscosity of the material, the more precise the control, making unmanned production possible. Third, it significantly improves production efficiency and reduces production costs and failure rates. Sequence List Free Content

[0018] Type the free content description paragraph for the sequence list here.

Claims

1. A flat-bottomed storage silo extrusion-type feeding device, comprising a feeding groove at the bottom of the silo, a herringbone baffle on the groove, a sliding frame at the bottom of the silo, and a valve that blocks the groove, characterized in that... The lower part of the herringbone baffle is equipped with several slide rails (2).

2. The feeding device according to claim 1, characterized in that... The slide rail at the lower part of the herringbone baffle is equipped with several follower baffles (3).

3. The feeding device according to claim 2, characterized in that... The lower slide rail of the herringbone baffle and the annular hanger of the follower baffle are equipped with self-lubricating bearings (tiles) or sliding plates to reduce friction. Alternatively, telescopic protective covers can be installed on the slide rail (both sides of the follower baffle) to reduce friction by adding lubricating oil inside the protective cover.

4. The feeding device according to claim 3, characterized in that... The two ends of the herringbone baffle are equipped with lifting mechanisms, which can be lead screws or hydraulic push rods (no picture is provided because the lifting mechanism itself is not innovative).

5. The feeding device according to claim 4, characterized in that... The valve used to block the trench is a folding valve (5), not a slide valve.

6. The feeding device according to claim 5, characterized in that... The folding valve (5) consists of only one long strip valve plate (12) with several valve holes.

7. The feeding device according to claim 6, characterized in that... The valve plate (12) of the folding valve (5) is equipped with upper and lower guide rails (7) on both sides to control its movement.

8. The feeding device according to claim 7, characterized in that... A polymer plate (13) is sandwiched between the upper and lower guide rails (7) and the valve plate (12).

9. The feeding device according to claim 8, characterized in that... Each of the valve holes of the valve plate (12) is equipped with an independent valve core. The valve core is composed of a core plate (9), a core plate (10), a hinge (8), a pin (14), and a pin sleeve (11).

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