Ventilation system capable of achieving radial segmented ventilation of silo grain pile

Abstract

The utility model relates to a ventilation system capable of achieving radial segmented ventilation of a silo grain pile, which comprises a silo body with the axis extending in the vertical direction, and more than two air inlet ventilation pipelines arranged at intervals in the circumferential direction of the silo body are arranged in the silo body. More than two air outlet ventilation pipelines and more than two air inlet ventilation pipelines which are arranged at intervals in the circumferential direction of the silo body are further arranged in the silo body, the air outlet ventilation pipelines are vertical pipelines with closed tops, the air inlet ventilation pipelines and the air outlet ventilation pipelines comprise at least two ventilation sections which are spaced up and down, and air inlets are uniformly distributed in the side walls of the ventilation sections of the air inlet ventilation pipelines; air outlets are evenly distributed in the side wall of each ventilation section of the ventilation pipeline, air outlet switch valves are arranged at the air outlets, and air inlet switch valves are arranged at the air inlets. The utility model provides a ventilation system capable of realizing radial segmented ventilation of a silo grain pile.

Description

Technical Field

[0001] The utility model relates to the technical field of bulk grain storage, in particular to a silo capable of realizing radial ventilation and heat dissipation of grain piles. Background Art

[0002] As an important type of bulk grain storage, silos play a very important role in bulk grain storage. Silos are generally 20-40m high and have thick grain layers. In actual production, corn transported from the north to the south will have a high moisture content, especially when transported to southern China, where the surface of the corn will condense at low temperatures. If the moisture content of the corn does not exceed the critical value, it is still allowed to be stored in the warehouse even if condensation occurs on the surface. This requires timely ventilation and precipitation after storage.

[0003] In addition, during the storage process, the bulk grain generates heat due to breathing, which may cause the local temperature of the bulk grain to be too high. The grain pile also needs to be ventilated and cooled in time.

[0004] The ventilation method of the prior art is to set a ventilation cage at the bottom of the silo. The air inlet of the ventilation cage is connected to the fan. When the grain pile needs to be ventilated and cooled, the air flows into the bottom of the grain pile through the ventilation cage, and then flows axially from bottom to top for longitudinal ventilation, thereby achieving ventilation and cooling of the grain pile.

[0005] There are two main problems with the existing technology: (1) The airflow flows through the grain pile from bottom to top. Due to the resistance of the grain pile, the gas flow rate will gradually decrease from bottom to top. Therefore, the ventilation and heat dissipation method in the existing technology has poor ventilation and heat dissipation effect on the upper and middle layers of the grain pile; (2) It is impossible to achieve local treatment of the grain pile. If the whole warehouse is ventilated to remove local moisture and heat, the moisture loss of grain in the normal grain area will increase, resulting in weight loss of stored grain. Utility Model Content

[0006] The utility model aims to provide a ventilation system which can perform radial segmented ventilation on a grain pile in a silo.

[0007] In order to solve the above technical problems, a technical solution of a ventilation system capable of realizing radial segmented ventilation of a grain pile in a silo is provided in the utility model as follows:

[0008] A ventilation system capable of realizing radial segmented ventilation of a grain pile in a silo comprises a silo body with an axis extending in an up-down direction, one or more air inlet ventilation ducts arranged at intervals along the circumference of the silo body are arranged in the silo body, one or more air outlet ventilation ducts arranged at intervals along the circumference of the silo body are also arranged in the silo body, the air inlet ventilation duct and the air outlet ventilation duct are vertical ducts with closed tops, the air inlet ventilation duct and the air outlet ventilation duct comprise at least two ventilation sections arranged up and down, air inlets are evenly distributed on the side walls of the ventilation sections of the air inlet ventilation duct, air outlets corresponding to the air inlets are arranged on the side walls of the ventilation sections of the air outlet ventilation duct, an air inlet switch valve is arranged at the air inlet, an air outlet switch valve is arranged at the air outlet, and loose grain filters are arranged at the air outlet and the air inlet.

[0009] Furthermore, there is one air outlet ventilation duct, which is arranged at the center of the silo body, and there are multiple air inlet ventilation ducts, which are arranged at intervals along the circumferential direction of the inner wall of the silo body.

[0010] Furthermore, the bottoms of the air inlet ventilation ducts are connected via a connecting pipe arranged circumferentially along the inner wall of the silo body.

[0011] Furthermore, there are multiple air outlet ventilation ducts, and the multiple air outlet ventilation ducts are circumferentially spaced on one side of the inner wall of the silo body; the number of air inlet ventilation ducts is consistent with the number of air outlet ventilation ducts, and the multiple air inlet ventilation ducts are circumferentially spaced on the other side of the inner wall of the silo body, and the air inlet ventilation ducts and the air outlet ventilation ducts symmetrically arranged with respect to the axis of the silo body form a pair of ventilation ducts, and in a pair of ventilation ducts, the air inlet on the air inlet ventilation duct and the air outlet on the air outlet ventilation duct are opposite to each other.

[0012] Furthermore, the bottoms of the air outlet ventilation ducts are connected via a first connecting pipe arranged along the circumference of the inner wall of the silo body, and the bottoms of the air inlet ventilation ducts are connected via a second connecting pipe arranged along the circumference of the inner wall of the silo.

[0013] Furthermore, the ventilation system also includes a negative pressure fan connected to the first connecting pipe and a positive pressure fan connected to the second connecting pipe.

[0014] Furthermore, each ventilation section on the air outlet ventilation duct is at the same height as the corresponding ventilation section on the air inlet ventilation duct.

[0015] Furthermore, at least two air outlets spaced apart from each other are arranged on the side wall of each ventilation section, and the air outlet switch valve includes an air outlet valve plate arranged on the inner side of the ventilation section side wall, the air outlet valve plate is rotatably matched with the inner side of the corresponding ventilation section side wall, an arc-shaped transmission gear ring is arranged on the inner wall of the air outlet valve plate, and the air outlet switch valve also includes an air outlet switch valve motor, and a motor shaft of the air outlet switch valve motor is connected to a motor shaft gear that meshes with the arc-shaped transmission gear ring for transmission.

[0016] The beneficial effects of the present invention are as follows: in the present invention, the air inlet ventilation duct and the air outlet ventilation duct include at least two ventilation sections arranged in sequence up and down. When in use, the height of the ventilation section corresponds to the height of the grain layer of the grain pile. When ventilation and heat dissipation of a certain height of the grain pile is required, the air inlet switch valve and the air outlet switch valve at the ventilation sections at other heights are closed, and the air flow enters the grain layer of the corresponding height along the air inlet, and then flows through the grain layer of the corresponding height along the radial direction of the silo body and flows into the corresponding air outlet ventilation duct through the air outlet, thereby realizing ventilation and heat dissipation of a grain layer of a certain height along the radial direction of the silo body, achieving the purpose of ventilating and heat dissipating the grain layer of the corresponding height when ventilation and heat dissipation is required, avoiding the problem of poor ventilation and heat dissipation effect of the surface grain pile and serious moisture loss of the bottom grain pile as in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] By reading the following detailed description with reference to the accompanying drawings, the above and other objects, features and advantages of the exemplary embodiments of the present disclosure will become readily understood. In the accompanying drawings, several embodiments of the present disclosure are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0018] Figure 1 It is a structural schematic diagram of embodiment 1 of the silo in the utility model;

[0019] Figure 2 This is a schematic diagram of the coordination between the silo body and the air inlet ventilation duct and the air outlet ventilation duct in the top view in Example 1;

[0020] Figure 3 yes Figure 2 A in the enlarged view;

[0021] Figure 4 yes Figure 1 The enlarged view of point B in the figure;

[0022] Figure 5 is a schematic diagram of the coordination between the air outlet ventilation duct and the first connecting pipe in Example 1;

[0023] Figure 6 It is a structural schematic diagram of Embodiment 2 of the silo in the utility model;

[0024] 1. Silo body; 2. Air outlet ventilation duct; 3. Partition; 4. Air outlet ventilation section; 5. Air outlet; 6. Air inlet ventilation duct; 7. Air inlet; 8. Air inlet ventilation section; 9. Ventilation section connecting hole; 10. Air outlet switch valve motor; 11. Motor shaft gear; 12. Air outlet valve plate; 13. First connecting pipe; 14. Second connecting pipe; 15. Bulk grain filter; 16. Connecting pipe; 17. Arc-shaped transmission gear ring. DETAILED DESCRIPTION

[0025] In order to facilitate the understanding of the present invention, the present invention is described in more detail below in conjunction with the accompanying drawings and specific embodiments. The accompanying drawings provide 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. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0026] 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 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.

[0027] Embodiment 1 of a ventilation system capable of realizing radial segmented ventilation of a grain pile in a silo is as follows Figures 1 to 5 As shown:

[0028] The utility model comprises a silo body 1 with an axis extending in the up-down direction, and a conical silo top which is smaller at the top and larger at the bottom is arranged on the top of the silo body.

[0029] The silo body is provided with three air inlet ventilation ducts 6 arranged at intervals along the circumference of the silo body, and the air inlet ventilation ducts 6 are fixed on the inner wall of one side of the silo body 1; the silo body 1 is also provided with three air outlet ventilation ducts 2 arranged at intervals along the circumference of the silo body, and the air outlet ventilation ducts 2 are fixed on the inner wall of the other side of the silo body. The bottom of each air outlet ventilation duct is connected through a first connecting pipe 13 arranged circumferentially along the inner wall of the silo body, and the bottom of each air inlet ventilation duct is connected through a second connecting pipe 14 arranged circumferentially along the inner wall of the silo. The silo also includes a negative pressure fan located outside the silo body connected to the first connecting pipe through the connecting pipe air outlet, and the second connecting pipe is provided with a connecting pipe air inlet. The bottom of the silo body is provided with a silo air inlet connected to the connecting pipe air inlet and a silo air outlet connected to the connecting pipe air outlet.

[0030] The air inlet ventilation duct and the air outlet ventilation duct arranged symmetrically with respect to the axis of the silo body constitute a pair of ventilation ducts, that is, a pair of ventilation ducts comprises a vertically arranged air inlet ventilation duct and a vertically arranged air outlet ventilation duct.

[0031] The air inlet ventilation duct and the air outlet ventilation duct are divided into three ventilation sections by two partitions spaced apart from each other. The ventilation section of the air inlet ventilation duct is called the air inlet ventilation section 8, and the ventilation section of the air outlet ventilation duct is called the air outlet ventilation section 4. Air inlets are evenly distributed on the side walls of each ventilation section of the air inlet ventilation duct, and air outlets corresponding to the air inlets are arranged on the side walls of each ventilation section of the air outlet ventilation duct. Ventilation section connecting holes 9 connecting the ventilation sections on the upper and lower sides of the partition are arranged on each partition. An air inlet switching valve is arranged at the air inlet, and an air outlet switching valve is arranged at the air outlet. Loose grain filters 15 are arranged at the air outlet and the air inlet. The loose grain filter 15 can prevent loose grain from entering the corresponding air inlet ventilation duct 6 and air outlet ventilation duct 2.

[0032] The three ventilation sections of the air inlet ventilation duct and the air outlet ventilation duct are defined from top to bottom as an upper ventilation section, a middle ventilation section and a lower ventilation section. The upper ventilation section of the air inlet ventilation duct is highly consistent with the upper ventilation section of the air outlet ventilation duct, the middle ventilation section of the air inlet ventilation duct is highly consistent with the middle ventilation section of the air outlet ventilation duct, and the lower ventilation section of the air inlet ventilation duct is highly consistent with the lower ventilation section of the air outlet ventilation duct.

[0033] In this embodiment, a plurality of air inlets 7 are evenly distributed on the side walls of each ventilation section of the air inlet ventilation duct, and a plurality of air outlets 5 are evenly distributed on the side walls of each ventilation section of the air outlet ventilation duct. In a pair of ventilation ducts, the air inlets on the air inlet ventilation duct and the air outlets on the air outlet ventilation duct face oppositely.

[0034] The structure of the air outlet switch valve is the same as that of the air inlet switch valve. In this embodiment, only the specific structure of the air outlet switch valve is described in detail. The air outlet switch valve includes an air outlet valve plate 12 arranged on the inner side of the ventilation section side wall. The air outlet valve plate 12 is an arc-shaped plate. The air outlet valve plate 12 rotates with the inner side of the corresponding ventilation section side wall. Specifically, arc-shaped guide grooves are arranged at the upper and lower ends of the air outlet valve plate on the ventilation section side wall. The upper and lower ends of the air outlet valve plate slide and guide with the arc-shaped guide groove. An arc-shaped transmission gear ring is arranged on the inner wall of the air outlet valve plate. 17. The air outlet switch valve also includes an air outlet switch valve motor 10. The motor shaft of the air outlet switch valve motor 10 is connected with a motor shaft gear 11 which is meshed with the arc-shaped transmission gear ring 17. When the motor shaft gear 11 rotates in one direction, the motor shaft gear 11 drives the air outlet valve plate 12 to move, and the air outlet valve plate 12 can simultaneously close the air outlets of the corresponding ventilation sections; when the motor shaft gear rotates in another direction, the motor shaft gear drives the air outlet valve plate to rotate in the opposite direction, and the air outlet valve plate can simultaneously open the air outlets of the corresponding ventilation sections.

[0035] During use, when ventilation and heat dissipation of the grain layer at the corresponding height is required, for example, heat dissipation of the grain layer at the corresponding height of the middle ventilation section is required, the outlet switch valves and the inlet switch valves of the upper ventilation section and the lower ventilation section can be closed, and only the outlet switch valves and the inlet switch valves of the middle ventilation section can be opened. When the negative pressure fan is working, the airflow enters the grain layer at the corresponding height through the air inlets of the middle ventilation section on the air inlet ventilation duct, and then flows radially along the silo body to the corresponding air outlet of the middle ventilation pipe on the air outlet ventilation duct, and finally is sucked out by the negative pressure fan through the air outlet ventilation duct, so as to realize directional ventilation and heat dissipation of the grain layer at the corresponding height. Of course, when the upper ventilation section, the middle ventilation section, and the lower ventilation section are required to work at the same time, all the outlet switch valves and the inlet switch valves can also be opened.

[0036] In the utility model, the silo air inlet and silo air outlet are arranged at the bottom of the silo body, which can reduce the construction difficulty and operation difficulty of setting the ventilation openings at the bottom of the cabin; the utility model can realize the ventilation of the high-temperature and high-humidity grain layer at a specific height, avoid the ventilation dead corner problem of the vertical ventilation of the whole warehouse in the prior art, and the ventilation efficiency is relatively high; after the silo is ventilated and cooled in winter, the basic grain temperature is relatively low. After entering summer, the surface grain temperature at the silo wall is relatively high due to the influence of the outside world, and the "cold core and hot skin" phenomenon is more serious, which is prone to moisture and heat transfer, resulting in local heating and pest breeding. At this time, opening all the air outlets of the air inlet ventilation duct and the air outlet ventilation duct, combined with the cold amount generated by the silo top air conditioner and the suction of the negative pressure fan, can effectively control the rise of the grain temperature of the silo wall.

[0037] Embodiment 2 of a silo capable of achieving radial ventilation and heat dissipation of grain piles Figure 6 As shown: Example 2 is different from Example 1 in that, in this embodiment, there is one air outlet ventilation duct 2, which is arranged at the center of the silo body 1, and there are six air inlet ventilation ducts 6, which are evenly spaced along the circumference of the inner wall of the silo body, and the bottoms of each air inlet ventilation duct are connected through a connecting pipe 16 arranged along the circumference of the inner wall of the silo body.

[0038] An air inlet is provided on the side wall of each ventilation section of the air inlet ventilation duct, and six air outlets facing the corresponding air inlets are provided at the same height position of the pipe wall of the air outlet ventilation duct. When in use, the airflow enters the grain pile through the air inlet of each air inlet ventilation duct, then passes through the grain layer along the radial direction of the silo body, and flows into the air outlet ventilation duct through the corresponding air outlet. This measure is mainly aimed at silos with a relatively large silo radius, which can effectively reduce the length of the airflow path and avoid the problem of excessive airflow loss caused by too long a flow path.

[0039] In the above description of this specification, unless otherwise clearly specified and limited, the terms "fixed", "installed", "connected" or "connected" should be understood in a broad sense. For example, with regard to the term "connection", it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements. Therefore, unless otherwise clearly defined in this specification, those skilled in the art can understand the specific meanings of the above terms in this utility model according to the specific circumstances.

[0040] 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 the orientation or position relationship, are based on the orientation or position relationship 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 position relationship terms cannot be understood or interpreted as limitations on the scheme of the utility model.

[0041] In addition, the terms "first" or "second" used in this specification to refer to numbers or ordinals are only used for descriptive purposes and cannot be understood as explicitly or implicitly indicating relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this specification, the meaning of "plurality" is at least two, such as two, three or more, etc., unless otherwise clearly and specifically defined.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model 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 utility model.

Claims

1. A ventilation system capable of realizing radial segmented ventilation of a grain pile in a silo, comprising a silo body with an axis extending in an up-and-down direction, characterized in that: One or more air inlet ventilation ducts arranged at intervals along the circumference of the silo body are arranged in the silo body, and one or more air outlet ventilation ducts arranged at intervals along the circumference of the silo body are also arranged in the silo body. The air inlet ventilation duct and the air outlet ventilation duct are vertical ducts with closed tops. The air inlet ventilation duct and the air outlet ventilation duct include at least two ventilation sections arranged up and down. Air inlets are evenly distributed on the side walls of each ventilation section of the air inlet ventilation duct, and air outlets corresponding to the air inlets are arranged on the side walls of each ventilation section of the air outlet ventilation duct. An air inlet switch valve is arranged at the air inlet, an air outlet switch valve is arranged at the air outlet, and loose grain filters are arranged at the air outlet and the air inlet.

2. The ventilation system according to claim 1, characterized in that: There is one air outlet ventilation duct, which is arranged at the center of the silo body, and there are multiple air inlet ventilation ducts, which are arranged at intervals along the circumferential direction of the inner wall of the silo body.

3. The ventilation system according to claim 2, characterized in that: The bottoms of the air inlet ventilation ducts are connected through a connecting pipe arranged circumferentially along the inner wall of the silo body.

4. The ventilation system according to claim 1, characterized in that: There are multiple air outlet ventilation ducts, which are circumferentially spaced apart on one side of the inner wall of the silo body; the number of air inlet ventilation ducts is the same as the number of air outlet ventilation ducts, which are circumferentially spaced apart on the other side of the inner wall of the silo body, and the air inlet ventilation ducts and the air outlet ventilation ducts symmetrically arranged with respect to the axis of the silo body form a pair of ventilation ducts, and in a pair of ventilation ducts, the air inlet on the air inlet ventilation duct and the air outlet on the air outlet ventilation duct face oppositely.

5. The ventilation system according to claim 4, characterized in that: The bottoms of the air outlet ventilation ducts are connected through a first connecting pipe arranged along the circumference of the inner wall of the silo body, and the bottoms of the air inlet ventilation ducts are connected through a second connecting pipe arranged along the circumference of the inner wall of the silo.

6. The ventilation system according to claim 5, characterized in that: The ventilation system also includes a negative pressure fan connected to the first connecting pipe and a positive pressure fan connected to the second connecting pipe.

7. The ventilation system according to claim 1, characterized in that: Each ventilation section on the air outlet ventilation duct is at the same height as the corresponding ventilation section on the air inlet ventilation duct.

8. The ventilation system according to any one of claims 1 to 7, characterized in that: At least two air outlets are arranged on the side wall of each ventilation section at an interval up and down. The air outlet switch valve includes an air outlet valve plate arranged on the inner side of the ventilation section side wall. The air outlet valve plate rotates with the inner side of the corresponding ventilation section side wall. An arc-shaped transmission gear ring is arranged on the inner wall of the air outlet valve plate. The air outlet switch valve also includes an air outlet switch valve motor. The motor shaft of the air outlet switch valve motor is connected to a motor shaft gear that meshes with the arc-shaped transmission gear ring for transmission.

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