Shaftless spiral elephant trunk for grain distribution of multi-layer granary
By using axle-free spiral slip pipes in multi-layer granaries, the spiral loose grain runners are used to slow down the falling speed of loose grain, the problems of grain fragmentation and automatic grading are solved, and the safety and quality of grain storage are improved.
Patent Information
- Application Number
- CN202422845589.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-21
- Publication Date
- 2025-09-02
- Estimated Expiration
- 2034-11-21
AI Technical Summary
In the existing multi-layer granary grain distribution method, the loose grain falls freely from the top of the warehouse, resulting in high grain crushing rate and serious automatic grading, affecting grain quality and storage safety.
A shaftless spiral slip pipe is used. By setting a shaftless spiral blade in the slip pipe in the warehouse, a spiral loose grain runner is formed to slow down the falling speed of the loose grain, reduce the grain crush rate and automatic grading phenomenon.
It effectively reduces the crushing rate and automatic grading of bulk grains during the fall process, and improves the storage safety and quality of grains.
Smart Images
Figure CN223291892U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of bulk grain storage, in particular to a shaftless spiral chute for distributing grain in a multi-layer grain silo. Background Art
[0002] The multi-story granary 1 (also known as a building warehouse) of the prior art is as follows Figure 1 As shown, it includes at least two layers of grain storage layers 2, and each layer of grain storage layer includes multiple granaries 3. Compared with traditional flat warehouses, multi-layer granaries have the advantages of large storage capacity, more granaries and less floor space.
[0003] Multiple grain storage layers and multiple granaries in each grain storage layer put forward new requirements for grain distribution in multi-layer granaries. The usual grain distribution method in the existing technology is that a top layer, also called an equipment layer 4, is arranged on the upper side of the uppermost grain storage layer. A main conveyor 5 is arranged along the length direction of the multi-layer granary, that is, the front-to-back direction, and multiple groups of branch conveyors are arranged on the left and right sides of the main conveyor 5. Each group of branch conveyors is located on the upper side of the corresponding granary, and each group of branch conveyors includes a left branch conveyor and a right branch conveyor located on the left and right sides of the main conveyor. Multiple drop-out ports are opened under each branch conveyor 6, and each drop-out port is connected to a silo 7 corresponding to the number of grain storage layers through a distributor. For example, when there are three grain storage layers, three silo chutes are connected to the distributor of each drop-out port, and each silo leads to the granary of the corresponding grain storage layer. The inner diameter of the silo is usually above 200 mm.
[0004] When distributing grain to multi-layer granaries, first use the elevator to lift the bulk grain to the equipment level, and then the bulk grain is transported from back to front through the main conveyor. During the transportation of the bulk grain through the main conveyor, it can be transported in the left and right directions through the corresponding branch conveyor. During the transportation along the branch conveyor, it falls through the corresponding drop port, and then flows to the chute in each silo through the distributor, and freely falls in the chute in each silo to the corresponding granary.
[0005] The existing distribution method suffers from the following problems: when bulk grain is transported from the silo roof through the internal chute to each storage layer, the high drop height (especially for the lowest storage layer) causes the grain to free fall at a high velocity, resulting in significant grain breakage and automatic grain grading. Automatic grading is a reflection of the grain pile's scattering. It refers to the phenomenon in which grains of the same type and mass concentrate in a certain area of the pile when vibrating, moving, or entering the silo, causing a redistribution of the grain's composition. Grain breakage and automatic grading not only directly impact the grain's usability, reducing its processing quality and trade grade, but also significantly impact its storage properties. Broken grain and impurities form a columnar impurity grading zone centered on the drop point when entering the silo. During long-term storage, this zone is prone to condensation, heat, mildew, and other abnormalities that compromise storage safety. Furthermore, when implementing safety measures such as mechanical ventilation, fumigation, and controlled atmosphere, these areas become "blind spots," making it impossible to eliminate hidden dangers, seriously impacting storage safety. Therefore, it is necessary to study a conveying equipment that can slow down the falling speed of grain, thereby reducing the grain breakage rate and reducing the occurrence of automatic grading when grain enters the warehouse. Utility Model Content
[0006] The utility model aims to provide a shaftless spiral chute for distributing grain in a multi-layer granary, which can slow down the falling speed of bulk grain and reduce the breakage rate of bulk grain during the grain distribution process.
[0007] In order to solve the above technical problems,
[0008] The technical solution of a shaftless spiral chute for distributing grain in a multi-layer granary in the utility model is:
[0009] It includes a chute in the silo, the upper end of which is connected to the discharge port of the silo and is used to pass the bulk grain to the corresponding grain storage layer. The chute in the silo is a shaftless spiral chute. The shaftless spiral chute includes a vertically arranged circular tube body. The shaftless spiral chute also includes a shaftless spiral blade fixed on the inner wall of the tube body and the axis extending in the up and down directions. The width of the shaftless spiral blade is equal to half of the inner diameter of the tube body. A spiral bulk grain flow channel with the upper end as the feed port and the lower end as the discharge port is formed between the shaftless spiral blade and the tube body. The upper end surface of the shaftless spiral blade is used for friction and rolling cooperation with the bulk grain.
[0010] Furthermore, the shaftless spiral chute connected to the lowermost grain storage layer is composed of multiple chute sections arranged in sequence along the up and down directions. In the up and down directions, adjacent chute sections are connected by flange bolts.
[0011] Furthermore, the shaftless spiral blade includes a spiral blade body of a metal structure, which is welded to the inner wall of the tube body, and a first baffle and a second baffle are fixed on both sides of the width direction of the spiral blade body by screws. The first baffle and the second baffle are provided with mounting grooves with opposite notches on the opposite sides, and a spiral wear-resistant plate located on the upper side of the spiral blade body is disassembled and installed in the mounting groove.
[0012] Furthermore, the upper end of the first baffle protrudes from the spiral wear-resistant plate, and the upper end of the second baffle protrudes from the spiral wear-resistant plate. A spiral bulk grain chute is formed between the first baffle, the spiral wear-resistant plate and the second baffle.
[0013] Furthermore, a first transition slope is formed between the side of the first baffle facing the second baffle and the spiral wear-resistant plate; a second transition slope is formed between the side of the second baffle facing the first baffle and the spiral wear-resistant plate.
[0014] The beneficial effects of the present invention are as follows: in the present invention, bulk grain is conveyed to the branch conveyor via the main conveyor, and then conveyed to the corresponding chute in the silo through the drop port and the distributor. In the chute in the silo, the bulk grain spirally moves downward along the spiral bulk grain flow channel formed between the shaftless spiral blade and the tube body. The width of the shaftless spiral blade is half of the inner diameter of the tube body. Therefore, no vertical channel is formed in the center of the shaftless spiral blade, and no bulk grain will free fall vertically. Compared with the free fall motion in the prior art, the falling speed of the grain is effectively reduced, thereby reducing the bulk grain breakage rate during the grain distribution process. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] The above and other objects, features and advantages of the exemplary embodiments of the present disclosure will become readily understood by reading the detailed description below with reference to the accompanying drawings. In the accompanying drawings, several embodiments of the present disclosure are shown in an illustrative and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:
[0016] Figure 1 This is a schematic structural diagram of a multi-layer granary in the prior art of the utility model;
[0017] Figure 2 This is a schematic structural diagram of the shaftless spiral chute in Example 1 of the present utility model;
[0018] Figure 3 This is a schematic structural diagram of the shaftless spiral chute in Example 2 of the present utility model;
[0019] 1. Multi-layer granary; 2. Grain storage layer; 3. Granary; 4. Equipment layer; 5. Main conveyor; 6. Branch conveyor; 7. Slide pipe in the silo; 8. Pipe body; 9. Shaftless spiral blade; 10. Slide pipe section; 11. Flange bolts; 12. Spiral bulk grain flow channel; 13. Spiral blade body; 14. First stop bar; 15. Second stop bar; 16. First transition slope; 17. Second transition slope; 18. Mounting groove; 19. Spiral wear plate. DETAILED DESCRIPTION
[0020] To facilitate understanding of the present invention, the present invention is described in more detail below with reference to the accompanying drawings and specific embodiments. The accompanying drawings illustrate preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described in this specification. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the disclosure of the present invention.
[0021] It should be noted that, unless otherwise defined, all technical and scientific terms used in this specification have the same meanings as those commonly understood by those skilled in the art in the field of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.
[0022] In the utility model, a shaftless spiral chute for distributing grain in a multi-layer granary is used. Figure 2 As shown:
[0023] Before introducing the shaftless spiral chute, we first give a brief structural introduction to the multi-layer granary.
[0024] The multi-layer granary includes three grain storage layers arranged up and down, and each grain storage layer includes multiple granaries. An equipment layer is arranged on the upper side of the uppermost grain storage layer. A main conveyor for conveying bulk grain from back to front is arranged in the equipment layer. A plurality of branch conveyors for conveying bulk grain in the left and right directions are arranged along the main conveyor. A plurality of drop-out ports arranged at intervals along the left and right directions are arranged on the lower side of each branch conveyor. Each drop-out port is connected to a chute in the silo that is the same number as the grain storage layers through a distributor and is used to convey the bulk grain to the corresponding grain storage layer.
[0025] In this embodiment, each discharge port is connected to three chutes in the warehouse, which are the first chute in the warehouse leading to the granary corresponding to the top grain storage layer, the second chute in the warehouse leading to the granary corresponding to the middle grain storage layer, and the third chute in the warehouse leading to the granary corresponding to the bottom grain storage layer. Among them, the length of the third chute in the warehouse is the longest, the length of the third chute in the warehouse is greater than the length of the second chute in the warehouse, and the length of the second chute in the warehouse is greater than the length of the first chute in the warehouse.
[0026] The above all belong to the prior art and will not be described in detail here.
[0027] The improvements of the present utility model are as follows: the silo chute is a shaftless spiral chute, comprising a vertically arranged circular tube body 8 and shaftless spiral blades 9 fixed to the inner wall of the tube body, with their axes extending in a vertical direction. The width of the shaftless spiral blades 9 is equal to half the inner diameter of the tube body. A spiral bulk grain flow channel is formed between the shaftless spiral blades and the tube body, with an upper end serving as a feed port and a lower end serving as a discharge port. The upper end surface of the shaftless spiral blades is configured to frictionally and rollingly engage the bulk grain. A shaftless spiral chute is so called because the shaftless spiral blades lack a central axis.
[0028] The length of the slide pipe in the second bin and the slide pipe in the third bin is longer, so the slide pipe in the second bin and the slide pipe in the third bin are composed of multiple slide pipe sections 10 arranged in sequence along the up and down direction. In the up and down direction, adjacent slide pipe sections are connected by flange bolts 11.
[0029] When in use, the bulk grain of the support conveyor enters the feed port at the upper end of the chute in the corresponding warehouse through the distributor. The bulk grain spirally slides downward in the chute in the corresponding warehouse. Compared with the direct free fall in the corresponding technology, its falling speed is slowed down, so it can effectively avoid the grain breakage rate and reduce the occurrence of automatic grading when the grain enters the warehouse.
[0030] Example 2 of the utility model of a multi-layer granary grain distribution shaftless spiral chute Figure 3 As shown:
[0031] Example 2 differs from Example 1 in that, in order to increase the service life of the shaftless spiral chute, the shaftless spiral blade in this embodiment includes a spiral blade body 13 of metal structure, which is welded to the inner wall of the tube body 8. A first stopper 14 and a second stopper 15 are fixed to the spiral blade body on both sides of the width direction by screws. The first stopper 14 and the second stopper 15 are provided with mounting grooves 18 with opposing notches on the opposing sides. A spiral wear-resistant plate 19 located on the upper side of the spiral blade body is removed and installed in the mounting groove 18. The spiral wear-resistant plate can be made of Teflon material.
[0032] The upper end of the first baffle protrudes above the spiral wear plate, while the upper end of the second baffle protrudes above the spiral wear plate. A spiral grain chute is formed between the first baffle, the spiral wear plate, and the second baffle. A first transition slope 16 is formed between the side of the first baffle facing the second baffle and the spiral wear plate; a second transition slope 17 is formed between the side of the second baffle facing the first baffle and the spiral wear plate.
[0033] During use, the bulk grain does not directly contact the spiral blade body, but directly contacts the spiral wear-resistant plate. After long-term use, the spiral wear-resistant plate can be replaced. The specific replacement method is to remove the corresponding chute section and directly pull the spiral wear-resistant plate out of the corresponding installation groove along the axial direction of the pipe body, and then insert the new spiral wear-resistant plate into the installation groove along the axial direction of the pipe body. The spiral wear-resistant plate itself has a certain toughness and hardness, and it can automatically deform along the direction of the installation groove. The segmented chute section facilitates the disassembly and replacement of the spiral wear-resistant plate.
[0034] In the above description of this specification, unless otherwise expressly specified or limited, terms such as "fixed," "mounted," "connected," or "connected" should be understood broadly. For example, the term "connected" can refer to a fixed connection, a removable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal connection between two components or the interaction between two components. Therefore, unless otherwise expressly defined in this specification, those skilled in the art can understand the specific meanings of the above terms in this utility model based on the specific circumstances.
[0035] According to the above description of this specification, those skilled in the art may also understand that the terms used below, such as "up", "down", "front", "back", "left", "right", "length", "width", "thickness", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", "center", "longitudinal", "lateral", "clockwise" or "counterclockwise", etc., which indicate orientation or positional relationships, are based on the orientation or positional relationships shown in the drawings of this specification, and are only for the purpose of facilitating the explanation of the scheme of the utility model and simplifying the description, rather than explicitly or implicitly indicating that the device or element involved must have the specific orientation, be constructed and operate in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms cannot be understood or interpreted as limitations on the scheme of the utility model.
[0036] In addition, the terms "first" or "second" used in this specification to refer to numbers or ordinal numbers are used for descriptive purposes only and should not be understood as explicitly or implicitly indicating relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this specification, "plurality" means at least two, such as two, three or more, etc., unless otherwise clearly specified.
[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.
Claims
1. A shaftless spiral chute for distributing grain in a multi-layer granary, comprising a chute connected at its upper end to a feeding port of the granary for distributing bulk grain to a corresponding grain storage layer, characterized in that: The chute in the silo is a shaftless spiral chute, which includes a vertically arranged circular tube body. The shaftless spiral chute also includes a shaftless spiral blade fixed on the inner wall of the tube body and the axis extending in the up and down directions. The width of the shaftless spiral blade is equal to half of the inner diameter of the tube body. A spiral bulk grain flow channel with the upper end as the feed port and the lower end as the discharge port is formed between the shaftless spiral blade and the tube body. The upper end surface of the shaftless spiral blade is used for friction and rolling cooperation with the bulk grain.
2. The shaftless spiral chute according to claim 1, characterized in that: The chute in the warehouse connected to the lowest grain storage layer is composed of multiple chute sections arranged in sequence along the up and down directions. In the up and down directions, adjacent chute sections are connected by flange bolts.
3. The shaftless spiral chute according to claim 1 or 2, characterized in that: The shaftless spiral blade includes a spiral blade body with a metal structure, which is welded to the inner wall of the tube body. A first baffle and a second baffle are fixed to both sides of the width direction of the spiral blade body by screws. Mounting grooves with opposite notches are provided on the opposite sides of the first baffle and the second baffle, and a spiral wear-resistant plate located on the upper side of the spiral blade body is disassembled and installed in the mounting groove.
4. The shaftless spiral chute according to claim 3, characterized in that: The upper end of the first baffle is convex from the spiral wear-resistant plate, and the upper end of the second baffle is convex from the spiral wear-resistant plate. A spiral bulk grain chute is formed between the first baffle, the spiral wear-resistant plate and the second baffle.
5. The shaftless spiral chute according to claim 3, characterized in that: A first transition slope is formed between the side of the first baffle facing the second baffle and the spiral wear-resistant plate; a second transition slope is formed between the side of the second baffle facing the first baffle and the spiral wear-resistant plate.