Auger feeding device and grain drying machine
By using wear-resistant sleeves and welded layers to protect the auger shaft in the auger feeding device, the problem of wear in the concentrated material drop area of the lower auger was solved, thus achieving equipment durability and smooth grain conveying.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-17
- Publication Date
- 2026-04-14
AI Technical Summary
In existing grain dryers, shaft wear is a common problem in the concentrated material discharge area of the lower auger.
Design a screw conveyor feeding device, which uses a wear-resistant sleeve to be fitted on the screw shaft of the material dropping section, and sets a second screw blade on the wear-resistant sleeve. The wear resistance performance is better than that of the screw shaft. The connection strength and stability are enhanced by the welded layer and welded holes to avoid wear of the screw shaft.
It effectively protects the auger shaft from wear, extends the service life of the equipment, reduces maintenance costs, and ensures smooth and unobstructed grain conveying.
Smart Images
Figure CN224121670U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of grain post-processing technology, and in particular relates to a screw conveyor feeding device and a grain dryer. Background Technology
[0002] In a grain dryer, the auger is one of the crucial components for circulating and transporting grain. Most existing grain dryers have one or two augers, such as an upper auger and a lower auger. The upper auger's function is to transport grain from the elevator to the main body of the dryer, while the lower auger's function is to transport grain exiting from the bottom of the dryer back to the elevator.
[0003] Because the grain coming out from the bottom of the dryer body has to fall onto the lower auger, the concentrated material falling area of the lower auger is prone to shaft wear. Utility Model Content
[0004] In view of the above-mentioned defects or deficiencies, this utility model provides a screw conveyor feeding device and a grain dryer, which aims to solve the technical problem that shaft wear is prone to occur in the concentrated material dropping area of the lower screw conveyor.
[0005] To achieve the above objectives, the first aspect of this utility model provides an auger feeding device, wherein the auger feeding device includes an auger housing, an auger shaft, and a wear-resistant sleeve; the auger shaft is rotatably mounted on the auger housing and has a material dropping section and a non-material dropping section arranged sequentially along its length; the non-material dropping section extends along its length and has a first auger blade; the wear-resistant sleeve is fitted onto the material dropping section and extends along its length and has a second auger blade; the wear resistance performance index of the wear-resistant sleeve is better than that of the auger shaft.
[0006] In one embodiment of the present invention, a first welding layer is formed at the junction of the first auger blade and the second auger blade.
[0007] In one embodiment of this utility model, the end of the first auger blade facing the second auger blade is provided with an overlapping notch into which the wear-resistant sleeve can extend. The overlapping notch has a first overlapping wall facing the auger shaft and a second overlapping wall connecting the first overlapping wall and the auger shaft. A second welding layer is formed between the first overlapping wall and the outer peripheral wall of the wear-resistant sleeve, and a third welding layer is formed between the second overlapping wall and the end wall of the wear-resistant sleeve. The portion of the first auger blade located outside the overlapping notch is connected to the second auger blade to form the first welding layer.
[0008] In one embodiment of the present invention, welding bevels are formed on both the front and back sides at the junction of the first auger blade and the second auger blade, and the first welding layer is disposed within the welding bevel.
[0009] In one embodiment of this utility model, a fourth welding layer is formed at both ends of the wear-resistant sleeve between the wear-resistant sleeve and the auger shaft.
[0010] In one embodiment of this utility model, at least one welding hole is provided at both ends of the wear-resistant sleeve along the circumferential direction, and a fourth welding layer is provided in the welding hole.
[0011] In one embodiment of this utility model, the auger shaft is made of ordinary carbon steel, and the wear-resistant sleeve is made of stainless steel or high-strength steel.
[0012] In one embodiment of this utility model, the distance between the outer contour of the first auger blade and / or the second auger blade and the inner wall of the auger shell is set to be greater than or equal to twice the grain length.
[0013] In one embodiment of this utility model, the first connection gap between the first auger blade and the auger shaft and / or the second connection gap between the second auger blade and the wear-resistant sleeve are set to be less than the minimum width of the grain.
[0014] In one embodiment of the present invention, the auger shaft includes a shaft body and two mounting shaft heads. The shaft body is a hollow shaft. One end of each of the two mounting shaft heads is respectively inserted through both ends of the shaft body, and the other end is respectively rotatably mounted on both ends of the auger housing. The shaft body is provided with a material dropping section and a non-material dropping section along its length.
[0015] To achieve the above objectives, the second aspect of this utility model provides a grain dryer, wherein the grain dryer includes the auger feeding device as described above, the grain dryer's discharge hopper is located above the lower end of the inclined auger feeding device, and the discharge port of the discharge hopper communicates with the auger shell, the wear-resistant sleeve is located below the discharge port, and both ends of the wear-resistant sleeve extend out of the discharge port.
[0016] Through the above technical solution, the auger feeding device provided by this utility model has the following beneficial effects:
[0017] When using the above-mentioned auger feeding device, the auger shaft is provided with a dropping section and a non-dropping section along its length. The first auger blade is directly provided on the non-dropping section, while a wear-resistant sleeve is first fitted on the dropping section, and then the second auger blade is provided on the wear-resistant sleeve. The wear resistance performance index of the wear-resistant sleeve is better than that of the auger shaft. Therefore, when the dropping section is set directly opposite the dropping area, the wear-resistant sleeve can protect the auger shaft from wear and is not easily worn itself.
[0018] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description
[0019] The accompanying drawings are provided to further illustrate the embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without any inventive effort. In the drawings:
[0020] Figure 1 This is a schematic diagram of the auger feeding device and the dropping hopper according to an embodiment of the present utility model;
[0021] Figure 2 This is a partial structural schematic diagram of the auger feeding device according to an embodiment of the present utility model;
[0022] Figure 3 yes Figure 2 Enlarged structural diagram at point A;
[0023] Figure 4 This is a partial structural schematic diagram of the auger feeding device according to an embodiment of the present utility model.
[0024] Explanation of reference numerals in the attached figures:
[0025] 100 Screwdriver housing 200 Screwdriver shaft
[0026] 210 Shaft body 220 Mounting shaft head
[0027] 300 First auger blade 400 Wear-resistant sleeve
[0028] 401 Welding hole; 402 Second weld layer
[0029] 500 Second auger blade 501 First weld layer
[0030] 600 Blanking hopper601 Blanking port Detailed Implementation
[0031] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.
[0032] The screw conveyor and grain dryer of this utility model are described below with reference to the accompanying drawings.
[0033] like Figure 1 As shown, this utility model provides a screw conveyor feeding device, wherein the screw conveyor feeding device includes:
[0034] Screw auger casing 100;
[0035] The auger shaft 200 is rotatably mounted on the auger housing 100 and has a material dropping section and a non-material dropping section arranged sequentially along the length direction. The non-material dropping section extends along the length direction and has a first auger blade 300.
[0036] The wear-resistant sleeve 400 is fitted onto the material drop section and extends along the length direction with a second auger blade 500. The wear resistance performance of the wear-resistant sleeve 400 is better than that of the auger shaft 200.
[0037] When using the above-mentioned auger feeding device, since the auger shaft 200 is provided with a dropping section and a non-dropping section in sequence along its length, and the first auger blade 300 is directly provided on the non-dropping section, while the wear-resistant sleeve 400 is first fitted on the dropping section, and then the second auger blade 500 is provided on the wear-resistant sleeve 400. The wear resistance performance index of the wear-resistant sleeve 400 is better than that of the auger shaft 200. Thus, when the dropping section is set facing the dropping area, the wear-resistant sleeve 400 can protect the auger shaft 200 from wear and is not easily worn itself.
[0038] Specifically, the wear resistance performance of the wear-resistant sleeve 400 being superior to that of the auger shaft 200 means that the wear-resistant sleeve 400 is more wear-resistant and less prone to wear than the auger shaft 200. Wear resistance performance indicators include, but are not limited to, wear amount, wear rate, and wear coefficient. When the wear amount or wear rate of the wear-resistant sleeve 400 is lower than that of the auger shaft 200, the wear resistance performance of the wear-resistant sleeve 400 is considered superior to that of the auger shaft 200. Similarly, when the wear coefficient of the wear-resistant sleeve 400 is higher than that of the auger shaft 200, the wear resistance performance of the wear-resistant sleeve 400 is considered superior to that of the auger shaft 200.
[0039] See Figures 1 to 3 In one embodiment of this utility model, a first weld layer 501 is formed at the junction of the first auger blade 300 and the second auger blade 500. That is, the first auger blade 300 and the second auger blade 500 can be connected by welding to seal the gap between them and ensure that the grain can be smoothly transferred. Of course, this utility model is not limited to this. The first auger blade 300 and the second auger blade 500 can also be connected by other methods, such as: metal wire or fiber sewing connection, and docking with the two auger blades respectively through an intermediate member. The intermediate member can be set as an I-beam to be pushed laterally between the two auger blades and the opposite ends are respectively snapped onto the corresponding auger blades.
[0040] In one embodiment of the present invention, the first auger blade 300 is provided with an overlapping notch at one end facing the second auger blade 500, into which the wear-resistant sleeve 400 can extend. The overlapping notch has a first overlapping wall facing the auger shaft 200 and a second overlapping wall connecting the first overlapping wall and the auger shaft 200. A second welding layer 402 is formed between the first overlapping wall and the outer peripheral wall of the wear-resistant sleeve 400, and a third welding layer is formed between the second overlapping wall and the end wall of the wear-resistant sleeve 400. The portion of the first auger blade 300 located outside the overlapping notch is joined with the second auger blade 500 to form the first welding layer 501. The first auger blade 300 has a portion extending towards the wear-resistant sleeve 400. The end of the wear-resistant sleeve 400 near the first auger blade 300 has space for the first auger blade 300 to overlap with the second auger blade 500. This ensures the junction of the first auger blade 300 and the second auger blade 500 is located at a predetermined length along the end wall of the wear-resistant sleeve 400. Furthermore, the first auger blade 300 not only has a first welding layer 501 with the second auger blade 500, but also a second welding layer 402 is formed between the first overlapping wall of the overlapping notch and the outer peripheral wall of the wear-resistant sleeve 400, and a third welding layer is formed between the second overlapping wall and the end wall of the wear-resistant sleeve 400. The first welding layer 501 and the third welding layer are staggered, thereby sealing the gap between the first auger blade 300 and the wear-resistant sleeve 400 and improving welding strength and stability.
[0041] Specifically, due to the addition of the wear-resistant sleeve 400, and to ensure that the distance between the outer contour of the second auger blade 500 and the inner wall of the auger housing 100 is consistent with the distance between the outer contour of the first auger blade 300 and the inner wall of the auger housing 100 after the second auger blade 500 is installed on the wear-resistant sleeve 400, the inner diameter of the second auger blade 500 should be larger than the inner diameter of the first auger blade 300. Furthermore, apart from the difference in inner diameter, the other dimensions of the second auger blade 500 can be consistent with those of the first auger blade 300, such as pitch, outer diameter, and thickness.
[0042] In one embodiment of this utility model, welding bevels are formed on both the front and back sides at the junction of the first auger blade 300 and the second auger blade 500, and a first weld layer 501 is disposed within the welding bevel. That is, a double-sided V-shaped bevel weld is formed at the junction of the first auger blade 300 and the second auger blade 500. After welding, the first weld layer 501 is a double V-shaped weld, which can ensure the depth of the weld, effectively reduce welding stress deformation, and improve welding quality and strength.
[0043] In one embodiment of this utility model, a fourth welding layer is formed at both ends of the wear-resistant sleeve 400 between the wear-resistant sleeve 400 and the auger shaft 200. That is, the wear-resistant sleeve 400 is welded to the auger shaft 200, which can ensure the installation stability of the wear-resistant sleeve 400. Of course, this utility model is not limited to this; the wear-resistant sleeve 400 can also be detachably mounted on the auger shaft 200, for example, by pin connection, key connection, or threaded connection.
[0044] like Figure 2 and Figure 3 As shown, in one embodiment of this utility model, at least one welding hole 401 is provided at intervals along the circumferential direction at both ends of the wear-resistant sleeve 400. A fourth welding layer is provided within the welding hole 401, thereby providing strong welding strength and good sealing performance. Specifically, the number of welding holes 401 arranged in a circle on the wear-resistant sleeve 400 and the diameter of the welding holes 401 can be determined according to actual needs. Preferably, there are two welding holes 401 arranged in a circle on the wear-resistant sleeve 400, and the two welding holes 401 are arranged opposite each other. In addition, the fourth welding layer can also be located directly at the outer end of the wear-resistant sleeve 400.
[0045] In one embodiment of this utility model, the auger shaft 200 is made of ordinary carbon steel, and the wear-resistant sleeve 400 is made of stainless steel or high-strength steel. Stainless steel and high-strength steel have better wear resistance than ordinary carbon steel, making the wear-resistant sleeve 400 less prone to wear than the auger sleeve. Specifically, the first auger blade 300 and the second hinged blade can be made of wear-resistant steel.
[0046] In one embodiment of this invention, if the gap between the auger blades and the inner wall of the auger housing 100 is too large, grain may remain, especially when the grain is conveyed at an angle. A large gap causes the grain to slide down, affecting the conveying capacity and potentially causing blockages. However, if the gap is too small, it can cause crushing damage to the grain. Therefore, the distance between the outer contour of the first auger blade 300 and / or the second auger blade 500 and the inner wall of the auger housing 100 can be set to be greater than or equal to twice the grain length. By limiting this minimum distance, the compressive force during grain conveying can be effectively reduced, preventing crushing damage caused by an excessively small gap. Specifically, according to simulation tests of grain conveying, the optimal distance between the outer contour of the auger blades and the inner wall of the auger housing 100 is twice the grain length plus 2mm to 3mm. At this distance, both the conveying capacity and the grain compressive force are optimal. It should be noted that the grains are generally rice, wheat and corn, among which rice is the most widely used. The grain length can be taken as the rice grain length, generally between 6 and 12 mm, specifically 10 mm.
[0047] In one embodiment of this utility model, the first connection gap between the first auger blade 300 and the auger shaft 200 and / or the second connection gap between the second auger blade 500 and the wear-resistant sleeve 400 are set to be less than the minimum width of the grain. By controlling the first and second connection gaps to be less than the minimum width of the grain, the phenomenon of grain getting stuck in the connection gaps can be avoided. It should be noted that the first auger blade 300 and the second auger blade 500 need to be welded to the auger shaft 200 and the wear-resistant sleeve 400 respectively. However, due to the lack of strict dimensional control during the manufacturing of the auger blades, there is a problem of local gaps between the auger blades and the corresponding bushings. If the gap is too large, it is easy for grain to get stuck. Therefore, in order to ensure the corresponding connection gaps, the dimensions need to be controlled accordingly during the manufacturing of the auger blades. Specifically, the first connection gap between the first auger blade 300 and the auger shaft 200 and / or the second connection gap between the second auger blade 500 and the wear-resistant sleeve 400 can be set to be less than or equal to 1.5mm.
[0048] See Figure 1 , Figure 2 and Figure 4 In one embodiment of this utility model, the auger shaft 200 includes a shaft body 210 and two mounting shaft heads 220. The shaft body 210 is a hollow shaft. One end of each of the two mounting shaft heads 220 is respectively inserted through both ends of the shaft body 210, and the other end is respectively rotatably mounted on both ends of the auger housing 100. The shaft body 210 has a material dropping section and a non-material dropping section along its length. Disassembling the auger shaft 200 into the shaft body 210 and the two mounting shaft heads 220 can, on the one hand, reduce manufacturing costs and weight by making the shaft body 210 a hollow shaft, and on the other hand, facilitate installation on the auger housing 100 and ensure the strength required for rotatable installation by using the mounting shaft heads 220.
[0049] Furthermore, this utility model also provides a grain dryer, wherein the grain dryer includes the auger feeding device described above, the grain dryer's discharge hopper 600 is located above the lower end of the inclined auger feeding device, and the discharge port 601 of the discharge hopper 600 communicates with the auger shell 100, the wear-resistant sleeve 400 is located below the discharge port 601, and both ends of the wear-resistant sleeve 400 extend out of the discharge port 601. Since the grain dryer adopts all the technical solutions of the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated further here.
[0050] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least one, such as two, three, etc., unless otherwise explicitly specified.
[0051] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0052] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0053] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.
Claims
1. A screw conveyor feeding device, characterized in that, The auger feeding device includes: Screw auger shell (100); The auger shaft (200) is rotatably mounted on the auger housing (100) and has a material dropping section and a non-material dropping section arranged sequentially along the length direction. The non-material dropping section extends along the length direction and has a first auger blade (300). A wear-resistant sleeve (400) is fitted onto the material dropping section and extends along the length direction with a second auger blade (500). The wear resistance performance of the wear-resistant sleeve (400) is better than that of the auger shaft (200).
2. The auger feeding device according to claim 1, characterized in that, The first auger blade (300) and the second auger blade (500) have a first weld layer (501) formed at the junction.
3. The auger feeding device according to claim 2, characterized in that, The first auger blade (300) has an overlapping notch at one end facing the second auger blade (500) for the end of the wear-resistant sleeve (400) to extend into. The overlapping notch has a first overlapping wall facing the auger shaft (200) and a second overlapping wall connecting the first overlapping wall and the auger shaft (200). A second welding layer (402) is formed between the first overlapping wall and the outer peripheral wall of the wear-resistant sleeve (400), and a third welding layer is formed between the second overlapping wall and the end wall of the wear-resistant sleeve (400). The portion of the first auger blade (300) located outside the overlapping notch is connected to the second auger blade (500) to form the first welding layer (501).
4. The auger feeding device according to claim 2, characterized in that, The first auger blade (300) and the second auger blade (500) have welding bevels formed on both sides at their joints, and the first welding layer (501) is disposed within the welding bevel.
5. The auger feeding device according to claim 1, characterized in that, A fourth welding layer is formed at both ends of the wear-resistant sleeve (400) between the wear-resistant sleeve (400) and the auger shaft (200).
6. The auger feeding device according to claim 5, characterized in that, The wear-resistant sleeve (400) has at least one welding hole (401) spaced at both ends along the circumferential direction, and the fourth welding layer is provided in the welding hole (401).
7. The auger feeding device according to any one of claims 1 to 6, characterized in that, The auger shaft (200) is made of ordinary carbon steel, and the wear-resistant sleeve (400) is made of stainless steel or high-strength steel.
8. The auger feeding device according to any one of claims 1 to 6, characterized in that, The distance between the outer contour of the first auger blade (300) and / or the second auger blade (500) and the inner wall of the auger shell (100) is set to be greater than or equal to twice the grain length; And / or, the first connection gap between the first auger blade (300) and the auger shaft (200) and / or the second connection gap between the second auger blade (500) and the wear-resistant sleeve (400) are set to be less than the minimum width of the grain.
9. The auger feeding device according to any one of claims 1 to 6, characterized in that, The auger shaft (200) includes a shaft body (210) and two mounting shaft heads (220). The shaft body (210) is a hollow shaft. One end of each of the two mounting shaft heads (220) is respectively inserted through both ends of the shaft body (210), and the other end is respectively rotatably mounted on both ends of the auger housing (100). The shaft body (210) has the material dropping section and the non-material dropping section in sequence along its length.
10. A grain dryer, characterized in that, The grain dryer includes a screw conveyor according to any one of claims 1 to 9, wherein the hopper (600) of the grain dryer is located on the upper side of the lower end of the inclined screw conveyor, and the discharge port (601) of the hopper (600) communicates with the screw conveyor shell (100), the wear-resistant sleeve (400) is located below the discharge port (601), and both ends of the wear-resistant sleeve (400) extend out of the discharge port (601).