A material discharge structure for grain drying channel in grain discharge section

Abstract

This utility model relates to a material discharge structure for a grain drying channel in a grain discharge section, including a hopper. Multiple grain discharge channels are horizontally arranged at equal intervals above the hopper. Each grain discharge channel has a trapezoidal groove suspended in its upper center. One end of the bottom surface of the trapezoidal groove has multiple material discharge holes evenly spaced along its long axis, and the other end has a stroke hole along its long axis. A control valve plate is attached to the bottom surface of the trapezoidal groove. The control valve plate has valve holes at equal intervals along its long axis, the same number as the material discharge holes, but staggered. A pull rod is suspended directly below the bottom surface of the end of the trapezoidal groove facing the stroke hole. A guide gasket is axially fitted onto the pull rod, and the guide gasket is perpendicularly connected to the bottom surface of the corresponding end of the trapezoidal groove. The outer end of the pull rod passes through the end wall of the corresponding grain discharge channel, and its inner end is connected to a linkage frame located directly below the stroke hole and connected to the control valve plate. This utility model can effectively solve problems such as material accumulation and blockage, and improve drying efficiency and uniformity.

Description

Technical Field

[0001] This utility model belongs to the technical field of grain dryers, and specifically relates to a material discharge structure for grain drying channels in the grain discharge section. Background Technology

[0002] Existing crossflow grain dryers dry grains using hot air that penetrates horizontally through a vertically falling layer of grain. A negative pressure hot air fan draws air in from the outlet, which then passes evenly through a perforated plate into the grain drying channel, ensuring full contact with the slowly descending grains. Moisture is removed through thermal convection. A temperature control system regulates the temperature and humidity of the hot air to prevent high-temperature damage to the grains. Alternating hot and cold air circulation improves drying efficiency, while a bottom discharge device controls the residence time, achieving uniform dehydration and ensuring drying quality.

[0003] The grain discharge device features multiple horizontally spaced discharge channels directly above the hopper. Each channel has a trapezoidal trough suspended in its center, and both the trough and the channel's edge are connected to a corresponding vertically positioned perforated plate. During grain drying, small impurities such as chaff, bran, and pebbles fall through the perforated plate into the trapezoidal trough. Due to the limited volume of the trough, if the accumulated material exceeds its height, it will clog the mesh at the bottom of the perforated plate, affecting hot air flow, resulting in low drying efficiency and poor drying uniformity. Furthermore, these accumulated materials are difficult to clean and require disassembly of the drying chamber shell after drying is complete. Utility Model Content

[0004] This utility model addresses the shortcomings of existing technologies by providing a material discharge structure for a grain drying channel in the discharge section. The specific technical solution is as follows:

[0005] This utility model provides a material discharge structure for a grain drying channel in a grain discharge section, including a hopper. Multiple grain discharge channels are arranged horizontally at equal intervals above the hopper. Each grain discharge channel has a trapezoidal groove suspended in its upper center, and the end face of the trapezoidal groove is connected to the inner wall of the corresponding grain discharge channel. The feature is that: one end of the bottom surface of the trapezoidal groove has multiple material discharge holes at equal intervals along its long axis, and the other end has a stroke hole along its long axis; a control valve plate is attached to the bottom surface of the trapezoidal groove, and the control valve plate has valve holes at equal intervals along its long axis, the same number as the material discharge holes and staggered from each other.

[0006] A pull rod is suspended directly below the bottom surface of the end of the trapezoidal groove facing the stroke hole along its long axis. A guide gasket is fitted on the pull rod with an axial gap, and the guide gasket is perpendicularly connected to the bottom surface of the corresponding end of the trapezoidal groove. The outer end of the pull rod passes through the end wall of the corresponding grain discharge channel, and its inner end is connected to the linkage frame located directly below the stroke hole and connected to the control valve plate.

[0007] The material discharge structure is divided into a normal state and a cleanup state. In the normal state, the linkage frame contacts the inner end of the stroke hole, and the control valve plate closes the stroke hole and multiple material discharge holes. In the cleanup state, the pull rod is stretched outward by external force, causing the linkage frame to move until it contacts the outer end of the stroke hole. The control valve plate opens the stroke hole and multiple material discharge holes through the valve hole on it.

[0008] As a preferred technical solution of this utility model, the stroke hole, the material discharge hole and the valve hole are all square hole structures. The valve hole and the material discharge hole have the same size. The width of the stroke hole and the width of the material discharge hole are the same, and its length is greater than the length of the material discharge hole.

[0009] The distance between the travel hole and its adjacent discharge hole is equal to the distance between adjacent discharge holes, and the distance between adjacent discharge holes is also the same as the distance between adjacent valve holes.

[0010] As a preferred technical solution of this utility model, the long edge of the control valve plate is integrally vertically connected with an inverted L-shaped straight rail, and the straight rail is laterally slidably engaged with a Z-shaped guide groove fixed on the bottom surface of the trapezoidal groove.

[0011] As a preferred technical solution of this utility model, the linkage frame is a scoop-shaped structure, and its bottom surface is connected to the control valve plate by a matching bolt; the inner end of the pull rod is provided with a threaded section, and a matching nut is screwed onto the threaded section, and an annular limiting flange is axially fixed at the root of the threaded section. The inner end of the pull rod is clamped and connected to the end face of the linkage frame by the limiting flange and the nut.

[0012] As a preferred embodiment of this utility model, the guide gasket is in contact with the inner wall of the corresponding grain discharge channel, and the two are connected by a bolt that is compatible with it.

[0013] As a preferred embodiment of this utility model, a handle is provided at the outer end of the pull rod.

[0014] The beneficial effects of this utility model are:

[0015] In this invention, a material discharge hole and a stroke hole are provided at the bottom of the trapezoidal trough, combined with a sliding control valve plate and a misaligned valve hole design. Under normal conditions, the control valve plate closes the material discharge hole and the stroke hole to prevent grain from being sucked in. During impurity removal, the control valve plate is pulled by a pull rod to align the valve hole with the material discharge hole, and accumulated sand, debris, etc. are automatically discharged. This process does not require stopping the machine or disassembling the equipment, significantly reducing the risk of blockage.

[0016] In this invention, the axial clearance fit between the tie rod, guide gasket, and linkage frame restricts the movement trajectory of the control valve plate. The working state can be switched by simply pulling the tie rod externally. The limiting design of the linkage frame and the stroke hole ensures accurate valve plate stroke, avoids excessive displacement, and ensures stable and reliable operation. Cleaning operations only require external operation of the tie rod, significantly reducing maintenance complexity and extending the continuous operation time of the equipment. Attached Figure Description

[0017] Figure 1 A schematic diagram (a) of the structure of this utility model installed on the hopper is shown;

[0018] Figure 2 A schematic diagram (II) of the structure of this utility model installed on the hopper is shown;

[0019] Figure 3 This diagram shows the structure of the present invention in its normal state;

[0020] Figure 4 This invention is illustrated by a structural schematic diagram from another perspective in its normal state.

[0021] Figure 5 It shows Figure 4 Enlarged view of the structure at part A in the middle;

[0022] Figure 6 A schematic diagram of the trapezoidal groove in this utility model is shown;

[0023] Figure 7 A schematic diagram of the assembly of the control valve plate and the pull rod in this utility model is shown.

[0024] The figure shows: 1. Hopper; 11. Grain discharge channel; 2. Trapezoidal groove; 21. Material drop hole; 22. Stroke hole; 23. Guide groove; 3. Control valve plate; 31. Valve hole; 32. Straight rail; 4. Pull rod; 41. Guide pad; 42. Handle; 43. Linkage frame; 44. Limit flange. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this utility model.

[0026] Example 1

[0027] To address the technical problems in the background section, the following material discharge structure for the grain drying channel in the discharge section is provided:

[0028] Combination Figures 1-7As shown, a material discharge structure for a grain drying channel in a grain discharge section includes a hopper 1. Multiple grain discharge channels 11 are arranged horizontally at equal intervals above the hopper 1. Each grain discharge channel 11 has a trapezoidal groove 2 suspended in its middle, and the end face of the trapezoidal groove 2 is connected to the inner wall of the corresponding grain discharge channel 11. Multiple material discharge holes 21 are evenly spaced along the long axis at one end of the inner bottom surface of the trapezoidal groove 2, and a stroke hole 22 is opened along the long axis at the other end. A control valve plate 3 is attached to the inner bottom surface of the trapezoidal groove 2. Valve holes 31, the same number as the material discharge holes 21 and staggered from each other, are evenly spaced along the long axis of the control valve plate 3.

[0029] A pull rod 4 is suspended directly below the bottom surface of the end of the trapezoidal groove 2 facing the stroke hole 22 along its long axis. A guide pad 41 is axially fitted on the pull rod 4, and the guide pad 41 is perpendicularly connected to the bottom surface of the corresponding end of the trapezoidal groove 2. The outer end of the pull rod 4 passes through the end wall of the corresponding grain discharge channel 11, and its inner end is connected to the linkage frame 43 located directly below the stroke hole 22 and connected to the control valve plate 3.

[0030] The material discharge structure is divided into a normal state and a cleanup state. In the normal state, the linkage frame 43 contacts the inner end of the stroke hole 22, and the control valve plate 3 closes the stroke hole 22 and multiple material discharge holes 21. In the cleanup state, the pull rod 4 is stretched outward by external force, causing the linkage frame 43 to move until it contacts the outer end of the stroke hole 22. The control valve plate 3 then opens the stroke hole 22 and multiple material discharge holes 21 through the valve hole 31 on it.

[0031] By adopting the above technical solution, the bottom of the trapezoidal trough 2 in the material feeding structure is provided with a material feeding hole 21 and a stroke hole 22, which are combined with the sliding control valve plate 3 and the misaligned design of the valve hole 31. Under normal conditions, the control valve plate 3 closes the material feeding hole 21 and the stroke hole 22 to prevent grain from being sucked out. When removing impurities, the control valve plate 3 is pulled by the pull rod 4 to align the valve hole 31 with the material feeding hole 21, and the accumulated sand, soil, and particles are automatically discharged. This process does not require stopping the machine to disassemble the equipment, which significantly reduces the risk of blockage.

[0032] The axial clearance fit of the pull rod 4, guide pad 41 and linkage frame 43 in the material feeding structure restricts the movement trajectory of the control valve plate 3; the working state can be switched by simply pulling the pull rod 4 externally. The limiting design of the linkage frame 43 and the stroke hole 22 ensures the accurate stroke of the valve plate, avoids excessive displacement, and ensures stable and reliable operation; the cleaning operation only requires external operation of the pull rod 4, which significantly reduces the complexity of maintenance and extends the continuous running time of the equipment.

[0033] The material discharge structure can promptly clear any accumulated material when it is found, or at the end of each drying cycle, the blockage of debris and grain can be cleared by manually pulling the lever 4.

[0034] like Figure 6 and Figure 7 As shown, the stroke hole 22, the discharge hole 21 and the valve hole 31 are all square hole structures. The valve hole 31 has the same size as the discharge hole 21. The width of the stroke hole 22 is the same as the width of the discharge hole 21, and its length is greater than the length of the discharge hole 21.

[0035] The distance between the travel hole 22 and its adjacent discharge hole 21 is equal to the distance between adjacent discharge holes 21, and the distance between adjacent discharge holes 21 is also the same as the distance between adjacent valve holes 31.

[0036] By adopting the above technical solution, the stroke hole 22, the discharge hole 21, and the valve hole 31 all adopt a square hole design, and the valve hole 31 is the same size as the discharge hole 21. The straight edge of the square hole makes the alignment of the orifices more precise when the control valve plate 3 slides, avoiding misalignment or partial obstruction caused by the curvature of the circular hole edge. Under normal conditions, the control valve plate 3 completely covers the discharge hole 21 and the stroke hole 22. When removing impurities, the valve hole 31 quickly aligns with the discharge hole 21, ensuring smooth discharge of impurities.

[0037] The stroke hole 22 has the same width as the discharge hole 21, but its length is greater than that of the discharge hole 21. This length of the stroke hole 22 provides a limiting space for the movement of the control valve plate 3. When the pull rod 4 pulls the linkage frame 43, the inner and outer ends of the stroke hole 22 correspond to the closed and open limit positions of the control valve plate 3, respectively. The longer length of the stroke hole 22 ensures that the alignment range between the valve hole 31 and the discharge hole 21 is controllable during the movement of the control valve plate 3 from fully closed to fully open, avoiding structural interference caused by insufficient stroke leading to misalignment of some holes or excessive movement.

[0038] The spacing between the stroke hole 22 and the adjacent discharge hole 21, the spacing between adjacent discharge holes 21, and the spacing between adjacent valve holes 31 are all consistent. This uniform spacing design ensures that the relative position changes of the valve holes 31 and each discharge hole 21 are completely synchronized when the control valve plate 3 slides. For example, when the control valve plate 3 moves by one spacing unit, multiple valve holes 31 simultaneously align with the corresponding discharge holes 21, avoiding the situation where some holes align prematurely while others remain blocked due to spacing differences. This ensures that debris is evenly discharged from all discharge holes 21, preventing local accumulation.

[0039] like Figure 4 and Figure 5 As shown, the linkage frame 43 has a scoop-shaped structure, and its bottom surface is connected to the control valve plate 3 by a matching bolt; the inner end of the pull rod 4 is provided with a threaded section, and a matching nut is screwed onto the threaded section, and an annular limiting flange 44 is axially fixed at the root of the threaded section. The inner end of the pull rod 4 is clamped and connected to the end face of the linkage frame 43 by the limiting flange 44 and the nut.

[0040] By adopting the above technical solution, the linkage frame 43 adopts a scoop-shaped structure, and its bottom surface is connected to the control valve plate 3 by an adapter bolt. The wide bottom design of the scoop-shaped structure increases the contact area with the control valve plate, making the stress distribution at the bolt connection point more uniform and avoiding deformation or connection failure of the control valve plate caused by local stress concentration.

[0041] The inner end of the pull rod 4 is provided with a threaded section, and the root is fitted with an annular limiting flange 44, which is clamped and connected to the end face of the linkage frame 43 by a nut. The limiting flange 44 and the nut cooperate to form a double limiting, preventing the linkage frame 43 from disengaging from the control valve plate 3 due to loosening of the threads when the pull rod 4 is stretched by external force, thus ensuring the synchronicity of the movement of the pull rod 4 and the control valve plate 3.

[0042] The linkage frame 43 and the control valve plate 3, as well as the linkage frame 43 and the tie rod 4, are all detachably connected. This allows for the replacement of worn control valve plate 3 and tie rod 4 without disassembling other components, greatly reducing maintenance difficulty.

[0043] like Figures 1-4 As shown, the guide gasket 41 is in contact with the inner wall of the corresponding grain discharge channel 11, and the two are connected by a matching bolt.

[0044] By adopting the above technical solution, the bolt connection makes the guide gasket 41 rigidly fixed to the inner wall of the grain discharge channel 11, avoiding the guide gasket 41 from being tilted due to force or vibration when the pull rod 4 moves axially, thereby ensuring that the pull rod 4 always slides along the preset axis and preventing the control valve plate 3 from deviating from the movement trajectory.

[0045] like Figures 1-3 as well as Figure 7 As shown, a handle 42 is provided at the outer end of the pull rod 4.

[0046] By adopting the above technical solution, the handle 42 can be easily pulled manually.

[0047] Example 2

[0048] Combination Figure 3 , Figure 6 and Figure 7 As shown, based on the above embodiments, this embodiment further provides the following:

[0049] In this embodiment, the long edge of the control valve plate 3 is integrally vertically connected to an inverted L-shaped straight rail 32, and the straight rail 32 is laterally slidably engaged with the Z-shaped guide groove 23 that is fixed on the bottom surface of the trapezoidal groove 2.

[0050] By adopting the above technical solution, the inverted L-shaped straight rail 32 of the control valve plate 3 is slidably engaged with the Z-shaped guide groove 23 on the inner bottom surface of the trapezoidal groove 2, which significantly improves the stability of the valve plate movement and the structural reliability.

[0051] The sliding contact surfaces of the Z-shaped guide groove 23 and the inverted L-shaped straight rail 32 adopt a planar fit, and the guide groove 23 is fixed to the bottom surface of the trapezoidal groove 2. Compared with point contact or line contact, large-area planar sliding can disperse the motion load, reduce the friction force per unit area, and avoid jamming or excessive wear when the control valve plate 3 moves.

[0052] The bending structure of the Z-shaped guide groove 23 can absorb some of the lateral vibration energy, reduce the impact transmitted to the control valve plate 3, and prevent the valve hole 31 and the discharge hole 21 from being misaligned due to vibration.

[0053] Working principle and usage process of this utility model:

[0054] This utility model is used in two states: normal state and impurity removal state.

[0055] 1. Normal state

[0056] Grains fall evenly from hopper 1 into multiple discharge channels 11, slowly descending along the channels. Hot air enters the drying channel laterally through the perforated plate from both sides of the hot air chamber, contacting the grains and removing moisture. Fine grains, sand, and other impurities pass through the perforated plate and fall into the trapezoidal trough 2. At this time, the pull rod 4 is in an unstretched state, the linkage frame 43 abuts against the inner end of the stroke hole 22, and the control valve plate 3 completely covers the discharge hole 21 and the stroke hole 22. The valve hole 31 is misaligned with the discharge hole 21, forming a seal to prevent impurities from being discharged. Impurities accumulated in the trapezoidal trough 2 are temporarily stored in the trough. The inverted L-shaped straight rail 32 of the control valve plate 3 slides with the Z-shaped guide groove 23 to ensure the lateral position of the valve plate is stable and to avoid displacement that could lead to seal failure.

[0057] 2. Switch to cleanup mode

[0058] Manual force is applied outward through the handle 42 at the outer end of the pull rod 4, causing the pull rod 4 to move axially along the guide pad 41, which in turn drives the linkage frame 43 to slide from the inner end to the outer end of the stroke hole 22. When the linkage frame 43 moves, the control valve plate 3 slides laterally in sync. The front valve hole 31 on the side of the control valve plate 3 facing the pull rod 4 is aligned and connected with the inner end of the stroke hole 22, and the remaining valve holes 31 are aligned and connected with the corresponding discharge holes 21. The remaining tail discharge hole 21 is left open. Impurities in the trapezoidal groove 2 are discharged through the discharge hole 21 and the stroke hole 22.

[0059] The Z-shaped snap-fit ​​structure of the straight rail 32 and the guide groove 23 restricts the control valve plate 3 to slide only in the lateral direction, preventing tilting or jamming; the length of the stroke hole 22 is greater than that of the discharge hole 21, ensuring that all holes are fully opened when the control valve plate 3 moves to the outer end, avoiding residual blockage.

[0060] 3. Reset to normal position

[0061] Manually push the lever 4 inward through the handle 42 to reset it. The linkage frame 43 retracts to the inner end of the stroke hole 22, and the control valve plate 3 slides in the opposite direction. The valve hole 31 is misaligned with the discharge hole 21 again, and the channel is closed again.

[0062] Repeat the above operation cycle to remove impurities, keep the hot air passage unobstructed, and ensure drying efficiency and uniform dehydration.

[0063] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A material discharge structure for a grain drying channel in a grain discharge section, comprising a hopper (1), wherein multiple grain discharge channels (11) are arranged horizontally at equal intervals above the hopper (1), and a trapezoidal groove (2) is suspended in the upper middle part of each grain discharge channel (11), and the end face of the trapezoidal groove (2) is connected to the inner wall of the corresponding grain discharge channel (11), characterized in that: The trapezoidal groove (2) has multiple material discharge holes (21) at equal intervals along its long axis at one end of its inner bottom surface, and stroke holes (22) at the other end along its long axis; a control valve plate (3) is attached to the inner bottom surface of the trapezoidal groove (2), and valve holes (31) with the same number as the material discharge holes (21) and staggered from each other are opened at equal intervals along its long axis on the control valve plate (3); A pull rod (4) is suspended directly below the bottom surface of the end of the trapezoidal groove (2) facing the stroke hole (22) along its long axis. A guide pad (41) is fitted on the pull rod (4) with an axial gap, and the guide pad (41) is perpendicularly connected to the bottom surface of the corresponding end of the trapezoidal groove (2). The outer end of the pull rod (4) passes through the end wall of the corresponding grain discharge channel (11) with a gap, and its inner end is connected to the linkage frame (43) located directly below the stroke hole (22) and connected to the control valve plate (3). The material feeding structure is divided into a normal state and a cleaned state. When it is in the normal state, the linkage frame (43) contacts the inner end of the stroke hole (22), and the control valve plate (3) closes the stroke hole (22) and multiple material feeding holes (21). When it is in the cleaned state, the pull rod (4) is stretched outward by external force, causing the linkage frame (43) to move until it contacts the outer end of the stroke hole (22). The control valve plate (3) connects and opens the stroke hole (22) and multiple material feeding holes (21) through the valve hole (31) on it.

2. The material discharge structure for a grain drying channel in a grain discharge section according to claim 1, characterized in that: The stroke hole (22), the discharge hole (21) and the valve hole (31) are all square hole structures. The valve hole (31) has the same size as the discharge hole (21). The width of the stroke hole (22) is the same as the width of the discharge hole (21), and its length is greater than the length of the discharge hole (21). The distance between the travel hole (22) and its adjacent discharge hole (21) is equal to the distance between adjacent discharge holes (21), and the distance between adjacent discharge holes (21) is also the same as the distance between adjacent valve holes (31).

3. The material discharge structure for a grain drying channel in a grain discharge section according to claim 1, characterized in that: The long edge of the control valve plate (3) is vertically connected to an inverted L-shaped straight rail (32), and the straight rail (32) is laterally slidably engaged with the Z-shaped guide groove (23) fixed on the bottom surface of the trapezoidal groove (2).

4. The material discharge structure for a grain drying channel in a grain discharge section according to claim 1, characterized in that: The linkage frame (43) has a scoop-shaped structure, and its bottom surface is connected to the control valve plate (3) by a matching bolt. The inner end of the pull rod (4) is provided with a threaded section, and a matching nut is screwed onto the threaded section. An annular limiting flange (44) is axially fixed at the root of the threaded section. The inner end of the pull rod (4) is clamped and connected to the end face of the linkage frame (43) through the limiting flange (44) and the nut.

5. The material discharge structure for a grain drying channel in a grain discharge section according to claim 1, characterized in that: The guide gasket (41) is in contact with the inner wall of the corresponding grain discharge channel (11), and the two are connected by a matching bolt.

6. A material discharge structure for a grain drying channel in a grain discharge section according to any one of claims 1 to 5, characterized in that: A handle (42) is provided at the outer end of the pull rod (4).

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