Multifunctional discharging center pipe for silo

Abstract

The utility model relates to a multifunctional blanking center pipe for a silo, which comprises a middle pipe which is fixedly and vertically arranged, an outer side pipe is coaxially and fixedly arranged on the periphery of the middle pipe, and a spiral blade which is coaxially arranged with the middle pipe is arranged between the middle pipe and the outer side pipe. A spiral flow channel used for spirally conveying bulk grains from top to bottom is formed among the spiral blade, the inner side pipe and the outer side pipe, the upper end of the spiral flow channel is provided with a feeding port, the outer side pipe is composed of at least two grain distribution pipe sections with different heights, and the pipe wall of each grain distribution pipe section is provided with at least one grain outlet corresponding to the spiral flow channel. A grain outlet valve is arranged at each grain outlet, and the grain outlet valve on each grain distribution pipe section is driven by a valve driving mechanism corresponding to each grain distribution pipe section. The utility model provides the multifunctional blanking central pipe for the silo, which can reduce the falling speed of bulk grains, reduce impact and crushing of the bulk grains and avoid automatic grading when the grains fall.

Description

Technical Field

[0001] The utility model relates to the technical field of bulk grain storage, in particular to a multi-functional blanking central pipe for a silo. Background Art

[0002] Silos include shallow silos and vertical silos. When bulk grain is loaded into the silo, the central pipe in the center of the silo is used for the loading operation.

[0003] Specifically, as disclosed in the Chinese patent CN211090750U, "A multi-functional central ventilation device for a shallow silo", it includes a shallow silo with a feeding port at the top and a top material concentrating device. A central ventilation device in the silo is arranged below the top material concentrating device. Both the central ventilation device in the silo and the top material concentrating device are located inside the shallow silo. The feeding port and the discharging port of the top material concentrating device are respectively connected corresponding to the feeding port of the shallow silo and the feeding port of the central ventilation device in the silo. A silo top fan connected to the upper end of the central ventilation device in the silo through a ventilation pipe is also arranged outside the silo top.

[0004] During use, bulk grain can fall into the top material concentrating device through the feeding port, and then the grain is distributed into the shallow silo through the central ventilation device in the silo. The problems existing in the existing multi-functional central ventilation device for a shallow silo are as follows: The bulk grain is distributed into the shallow silo in a free-fall state through the central ventilation device at the silo top, and the falling speed of the bulk grain is relatively large, which is prone to problems of impact breakage and impurity classification; at the same time, after the loading operation, a large amount of broken grain particles and heavier impurities will still accumulate in the central pipe. After the grain loading is completed, this part of the high-impurity grain needs to be discharged, cleaned and then loaded into the silo again to enter normal storage, and this can only be smoothly achieved in a silo with a central grain discharging port. Otherwise, new grain storage hazards will be formed. Content of the Utility Model

[0005] The purpose of the utility model is to provide a multi-functional blanking central pipe for a silo that can reduce the falling speed of bulk grain and reduce the impact breakage of bulk grain.

[0006] To solve the above technical problems, the technical solution of a multi-functional blanking central pipe for a silo in the utility model is as follows:

[0007] A multi-functional blanking central pipe for a silo, comprising a middle pipe fixedly arranged and vertically disposed. An outer pipe is fixedly arranged coaxially around the middle pipe. A spiral blade coaxial with the middle pipe is arranged between the middle pipe and the outer pipe. A spiral flow channel for the spiral transportation of bulk grain from top to bottom is formed between the spiral blade and the inner pipe and the outer pipe. The upper end of the spiral flow channel is the feed inlet. The outer pipe is composed of at least two grain distribution pipe segments of different heights. At least one grain outlet corresponding to the spiral flow channel is arranged on the pipe wall of each grain distribution pipe segment. A grain outlet valve is arranged at each grain outlet, and the grain outlet valves on each grain distribution pipe segment are respectively driven by valve driving mechanisms corresponding to each grain distribution pipe segment.

[0008] Further, the grain outlet valve is guided and movably assembled on the pipe wall of the corresponding grain distribution pipe segment in the up and down direction. The valve driving mechanism includes a reel driven by a motor. A valve pull rope connected to the corresponding grain outlet valve is wound on the reel. A valve spring applying a downward force to the grain outlet valve is arranged between the corresponding grain outlet valve and the grain distribution pipe segment.

[0009] Further, at least two groups of valve groups arranged at intervals in the circumferential direction are arranged on the pipe wall of each grain distribution pipe segment. Each valve group includes at least two of the above-mentioned grain outlet valves arranged at intervals in the up and down direction. Adjacent two grain outlet valves in the same group of grain outlet valves are connected by a connecting pull rope. The valve spring is arranged between the grain outlet valve at the lowest position in the same group of grain outlet valves and the grain distribution pipe segment.

[0010] Further, the valve groups of two adjacent grain distribution pipe segments in the up and down direction are arranged staggeredly in the circumferential direction.

[0011] Further, valve ventilation holes are arranged on the grain outlet valve. The multi-functional blanking central pipe further includes an inner pipe rotatably and coaxially assembled inside the middle pipe. Inner pipe ventilation holes are arranged on the pipe wall of the inner pipe. Middle pipe ventilation holes corresponding to the inner pipe ventilation holes are arranged on the pipe wall of the middle pipe. During the rotation of the inner pipe, there are a blocking position where the inner pipe blocks the middle pipe ventilation hole and a communicating position where the inner pipe ventilation hole communicates with the middle pipe ventilation hole.

[0012] Further, the inner pipe is driven by an inner pipe driving mechanism.

[0013] Further, a rotary joint for connecting a corresponding ventilation pipe is arranged at the upper end of the inner pipe.

[0014] The beneficial effects of the present utility model are as follows: When in use, the bulk grain is conveyed spirally downward along the spiral flow channel from the feed inlet of the spiral flow channel. The bulk grain does not undergo free-fall motion. The spiral flow channel can slow down the downward conveying speed of the bulk grain, reducing the impact and breakage problems caused by excessive speed. When it is necessary to distribute grain at a lower position in the granary, the grain outlet valve on the lower-positioned grain distribution pipe section is opened. During the spiral movement of the bulk grain along the spiral flow channel, under the action of centrifugal force, it falls into the granary through the corresponding discharge outlet. As the height of the grain pile in the granary increases, the grain outlet at the lower position is closed through the grain storage port valve, and the grain outlet at the upper position is opened. During the downward conveying process of the bulk grain through the spiral flow channel, it will be discharged through the upper-positioned grain outlet, thereby realizing layer-by-layer grain distribution. The grain flow flowing in the spiral flow channel can be smoothly discharged through the grain outlet, avoiding blockage of the grain in the spiral flow channel.

[0015] Further, when it is necessary to ventilate and permeate the grain pile, the inner tube is rotated to the communication working position. At this time, the air flow can flow through the grain outlet valve, the ventilation holes in the middle tube, the ventilation holes in the inner tube, and the inner cavity of the inner tube. That is to say, the feeding central tube in the present utility model can not only realize the distribution of bulk grain but also realize ventilation and air permeability, achieving multi-functional use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] By referring to the accompanying drawings and reading the following detailed description, the above and other objects, features, and advantages of the exemplary embodiments of the present disclosure will become readily understandable. In the drawings, several embodiments of the present disclosure are shown in an exemplary rather than restrictive manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0017] Figure 1 is a schematic structural diagram of an embodiment of the present utility model;

[0018] Figure 2 is Figure 1 a schematic diagram of the cooperation of the middle tube, the outer tube, and the spiral blade in;

[0019] Figure 3 is Figure 1 an enlarged view of part A in;

[0020] Figure 4 is Figure 2 a schematic diagram of the cooperation of the grain outlets and the grain outlet valves on two adjacent grain distribution pipe sections in;

[0021] 1. Inner tube gear; 2. Inner tube; 3. Intermediate tube; 4. Outer tube; 5. Spiral flow channel; 4. Spiral blade; 7. Upper grain distribution tube section; 8. Lower grain distribution tube section; 9. Driving motor; 10. Motor shaft gear; 11. First reel; 12. Mounting plate; 13. Valve pull rope; 14. Grain outlet valve; 15. Grain outlet; 16. Connecting pull rope; 17. Valve spring; 18. Spring seat; 19. Slideway; 20. Inner tube vent hole; 21. Intermediate tube vent hole; 22. Second reel; 23. Reversing pulley. Detailed implementation manner

[0022] For the convenience of understanding the present invention, the present invention will be described in more detail below with reference to the accompanying drawings and specific embodiments. The preferred embodiments of the present invention are shown in the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described in this specification. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure content of the present invention more thorough and comprehensive.

[0023] It should be noted that unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not used to limit the present invention.

[0024] An embodiment of a multi-functional feeding central tube for a silo in the present invention is as Figures 1 to 4 shown:

[0025] It includes an intermediate tube 3 fixedly arranged and vertically arranged. At the upper end of the intermediate tube 3, a horizontally arranged mounting plate 12 is provided. An outer tube 4 is fixedly arranged coaxially around the intermediate tube. A spiral blade 4 coaxially arranged with the intermediate tube is provided between the intermediate tube 3 and the outer tube 4. In this embodiment, the inner circumference of the spiral blade 4 is welded and fixed to the outer wall of the intermediate tube 3, and the outer circumference of the spiral blade 4 is welded and fixed to the inner wall of the outer tube 4. A spiral flow channel 5 for spiral conveying of bulk grain from top to bottom is formed between the spiral blade and the inner tube and the outer tube. The upper ends of the intermediate tube and the outer tube are open to form the feed port of the spiral flow channel, and the lower ends of the intermediate tube and the outer tube are open to form the discharge port of the spiral flow channel. During use, the bottoms of the intermediate tube and the outer tube are higher than the bottom of the silo.

[0026] The outer tube is composed of two (or more) grain distribution pipe segments with different heights. In this embodiment, the grain distribution pipe segment located higher is called the upper grain distribution pipe segment 7, and the grain distribution pipe segment located lower is called the lower grain distribution pipe segment 8. The upper grain distribution pipe segment 7 and the lower grain distribution pipe segment 8 are integrally formed (or welded together). At least one grain outlet 15 corresponding to the spiral flow channel is arranged on the pipe wall of each grain distribution pipe segment. A grain outlet valve is arranged at each grain outlet 15, and the grain outlet valves on each grain distribution pipe segment are respectively driven by the valve driving mechanisms corresponding to each grain distribution pipe segment.

[0027] In this embodiment, a slideway 19 with a guiding direction extending in the up and down direction corresponding to the grain outlet valve is arranged on the outer periphery of the corresponding grain distribution pipe segment. The grain outlet valve 14 is guidingly and movably assembled on the corresponding slideway 19. The valve driving mechanism includes a reel driven by a motor. A valve pull rope 13 connected to the corresponding grain outlet valve is wound around the reel. A valve spring 17 applying a downward acting force to the grain outlet valve is arranged between the corresponding grain outlet valve and the grain distribution pipe segment.

[0028] Specifically, at least two groups of valve groups arranged at intervals in the circumferential direction are arranged on the pipe wall of each grain distribution pipe segment. Each valve group includes at least two of the above-mentioned grain outlet valves 14 arranged at intervals in the up and down direction. Adjacent two grain outlet valves in the same group of grain outlet valves are connected by a connecting pull rope 16. The valve spring 17 is arranged between the grain outlet valve at the lowest position in the same group of grain outlet valves and the grain distribution pipe segment. A spring seat 18 is fixed on the outer periphery of the corresponding grain distribution pipe segment, and the upper end of the valve spring 17 is connected to the lower end of the corresponding spring seat 18.

[0029] In this way, one valve pull rope can realize the synchronous movement of the grain outlet valves in the same valve group on one grain distribution pipe segment. The valve groups of two adjacent grain distribution pipe segments in the up and down direction are arranged staggeredly in the circumferential direction. The grain outlet valves on each grain distribution pipe segment respectively correspond to their own reels. For example, the reels are divided into a first reel 11 and a second reel 22. The first reel 11 is driven by a first motor, and the second reel 22 is driven by a second motor. The first motor and the second motor are arranged on a mounting plate 12. The grain outlet valves in the same group on the upper grain distribution pipe segment can be connected to the first reel through the corresponding valve pull rope, and the two groups of grain outlet valves on the lower grain distribution pipe segment can be connected to the second reel through the corresponding valve pull rope. Since in this embodiment, the grain outlets are distributed in the circumferential direction on the outer periphery of the corresponding grain distribution pipe segment, a plurality of first reels and second reels arranged at intervals in the circumferential direction are arranged on the mounting plate, and the grain outlet valves on each side are respectively driven by the corresponding reels. In order to facilitate the connection between the valve pull rope and the reel, a reversing pulley 23 for the corresponding valve pull rope to wind around and reverse is arranged on the outer tube, so that the grain outlet valves of the two valve groups can share one reel, thereby reducing the number of reels and motors used.

[0030] The valve of the grain outlet is provided with a valve ventilation hole, and the bulk grain cannot pass through the valve ventilation hole. The multi-functional blanking central pipe further includes an inner pipe 2 rotatably assembled coaxially inside the middle pipe. The inner wall of the inner pipe 2 is provided with inner pipe ventilation holes 20, and the inner wall of the middle pipe 3 is provided with middle pipe ventilation holes 21 corresponding to the inner pipe ventilation holes 20. A bulk grain ventilation filter screen is arranged at the middle pipe ventilation holes 21. During the rotation of the inner pipe, there are a blocking position where the inner pipe blocks the middle pipe ventilation holes and a communicating position where the inner pipe ventilation holes communicate with the middle pipe ventilation holes.

[0031] In this embodiment, the inner pipe is driven by an inner pipe driving mechanism. The inner pipe driving mechanism includes a driving motor 9. A motor shaft gear 10 is arranged on the motor shaft of the driving motor 9. The upper end of the inner pipe is provided with an inner pipe gear 1, and the inner pipe gear 1 meshes with the motor shaft gear 10 for transmission. The upper end of the inner pipe is provided with a rotating joint (not shown in the figure) for connecting the corresponding ventilation pipe. During use, the driving motor drives the inner pipe to rotate. When the inner pipe ventilation holes 20 correspond to the middle pipe ventilation holes 21, the inner pipe is in the communicating position, and at this time, the inner cavity of the inner pipe can be used for ventilation operation; when the middle pipe ventilation holes 21 are blocked by the inner pipe, the inner pipe is in the blocking position. A blower is arranged at the top of the silo, and the blower is connected to the rotating joint at the upper end of the inner pipe through a ventilation pipe. The blower sucks air, and the hot air in the grain pile can be drawn out of the silo through the inner pipe.

[0032] During use, when it is necessary to distribute grain into the silo, the inner pipe is first in the blocking position, and each grain outlet is closed. The bulk grain enters the spiral flow channel through the feed inlet, and then moves downward along the spiral flow channel until it flows out from the lower port of the spiral flow channel. When the height of the grain pile in the granary buries the lower port of the spiral flow channel, the grain outlet on the lower side blanking pipe section is opened. As the height of the grain pile continues to increase, the grain outlet on the upper side blanking pipe section is opened until the grain distribution ends. When bulk grain discharging operation is required, the bulk materials outside the blanking central pipe are removed, and the bulk grain in the spiral flow channel will flow out through the lower port of the spiral flow channel by gravity until it is emptied, which is convenient for the next grain distribution use.

[0033] In the above description of this specification, unless otherwise clearly specified and limited, terms such as "fixed", "installed", "connected" or "joined" should be understood in a broad sense. For example, for the term "connected", it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, or it can be the communication inside two components or the interaction relationship between two components. Therefore, unless otherwise clearly limited in this specification, those skilled in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

[0034] Based on the above description of this specification, those skilled in the art can also understand the following terms used, such as "upper", "lower", "front", "rear", "left", "right", "length", "width", "thickness", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", "center", "longitudinal", "transverse", "clockwise" or "counterclockwise", etc. The terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings of this specification. It is only for the purpose of facilitating the description of the solution of the present invention and simplifying the description, rather than explicitly or implicitly indicating that the device or element involved must have the specific orientation, be constructed and operated in the specific orientation. Therefore, the above terms of orientation or positional relationship cannot be understood or interpreted as a limitation to the solution of the present invention.

[0035] In addition, the terms "first" or "second" etc. used in this specification to refer to numbers or ordinals are only for descriptive purposes and cannot be understood as explicitly or implicitly indicating relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this specification, "a plurality of" means at least two, such as two, three or more, etc., unless otherwise specifically defined.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multifunctional discharging central pipe for a silo, characterized in that: It includes an intermediate pipe which is fixedly arranged and vertically disposed. An outer pipe is fixedly arranged coaxially around the intermediate pipe. A spiral blade coaxial with the intermediate pipe is arranged between the intermediate pipe and the outer pipe. A spiral flow passage for spiral conveying of bulk grain from top to bottom is formed between the spiral blade and the inner pipe and the outer pipe. The upper end of the spiral flow passage is the feed inlet. The outer pipe is composed of at least two grain distribution pipe sections of different heights. At least one grain outlet corresponding to the spiral flow passage is arranged on the pipe wall of each grain distribution pipe section. A grain outlet valve is arranged at each grain outlet. The grain outlet valves on each grain distribution pipe section are respectively driven by valve driving mechanisms corresponding to each grain distribution pipe section.

2. The multi-functional blanking center pipe according to claim 1, characterized in that: The grain outlet valve is guided and movably assembled on the pipe wall of the corresponding grain distribution pipe section in the up and down direction. The valve driving mechanism includes a reel driven by a motor. A valve pull rope connected to the corresponding grain outlet valve is wound around the reel. A valve spring applying a downward acting force to the grain outlet valve is arranged between the corresponding grain outlet valve and the grain distribution pipe section.

3. The multifunctional blanking center tube according to claim 2, characterized in that: At least two groups of valve groups arranged at intervals in the circumferential direction are arranged on the pipe wall of each grain distribution pipe section. Each valve group includes at least two of the above-mentioned grain outlet valves arranged at intervals in the up and down direction. Adjacent two grain outlet valves in the same group of grain outlet valves are connected by a connecting pull rope. The valve spring is arranged between the grain outlet valve at the lowest position in the same group of grain outlet valves and the grain distribution pipe section.

4. The multifunctional blanking center tube according to claim 3, wherein: The valve groups of two adjacent grain distribution pipe sections in the up and down direction are arranged staggeredly in the circumferential direction.

5. The multi-functional blanking center pipe according to any one of claims 1 to 4, characterized in that: Valve ventilation holes are arranged on the grain outlet valve. The multi-functional blanking central pipe further includes an inner pipe rotatably assembled coaxially inside the intermediate pipe. Inner pipe ventilation holes are arranged on the pipe wall of the inner pipe. Intermediate pipe ventilation holes corresponding to the inner pipe ventilation holes are arranged on the pipe wall of the intermediate pipe. During the rotation of the inner pipe, there are a blocking position where the inner pipe blocks the intermediate pipe ventilation hole and a communicating position where the inner pipe ventilation hole communicates with the intermediate pipe ventilation hole.

6. The multi-functional blanking center tube according to claim 5, characterized in that: The inner pipe is driven by an inner pipe driving mechanism.

7. The multifunctional blanking center tube according to claim 5, wherein: A rotary joint for connecting a corresponding ventilation duct is arranged at the upper end of the inner pipe.

Images