Grain screening device

Abstract

The utility model discloses a grain screening device which comprises a screening frame and a screening net arranged at the bottom of the screening frame, and further comprises a supporting frame for installing the screening frame, a collecting frame in butt joint with the bottom of the screening frame is placed at the upper end of the supporting frame, and an installing frame is fixedly connected to the upper end of the screening frame. A dust box in butt joint with the upper end of the screening net is fixedly connected to the upper end of the mounting frame, a limiting shaft and a reciprocating lead screw are transversely and rotationally connected to an inner cavity of the mounting frame, the limiting shaft and the reciprocating lead screw are movably sleeved with a scraper, the scraper is in threaded connection with the reciprocating lead screw, and multiple sets of vibration block machines are movably arranged at the bottom of the screening net in a contact mode. According to the utility model, the motor and the transmission structure are arranged, so that the scraping plate can scrape grains accumulated at the upper end of the screening net back and forth while the motor is driven, and the bottom of the filtering net can be knocked and vibrated by utilizing the transmission structure; and therefore, grains at the upper end of the filter screen can be relatively thoroughly and uniformly distributed and vibratively screened, and the overall screening effect is improved.

Description

Technical Field

[0001] The utility model relates to the field of agricultural product processing, in particular to a grain screening device. Background Art

[0002] Grain screening is a device used to screen and separate grains from impurities. Since the harvested grains contain straw, soil and other particulate impurities, in order to ensure the quality of the grains after storage, the grains need to be screened and impurities removed before storage. The principle of grain screening: Separate the grains and impurities according to the size difference between them. A vibrating mesh screen structure is often used for processing. Since the mesh size of the mesh screen is fixed, particles smaller than the mesh size can be filtered out, and particles larger than the mesh size are retained on the mesh screen.

[0003] In the current grain vibration screening process, when there is a lot of grain accumulation, the effect of vibration screening will be very poor, and it is difficult to achieve complete impurity separation of the grain accumulated on the upper end. Therefore, it is necessary to design a device that can assist in the rapid and relatively thorough impurity separation and screening of grain. Utility Model Content

[0004] The utility model designs a grain screening device to solve the technical problems raised in the background technology and proposes the following technical solutions:

[0005] A grain screening device comprises a screening frame and a screening net arranged at the bottom of the screening frame, a discharge port is arranged at the bottom of one side of the screening frame, and also comprises a support frame for installing the screening frame, a collecting frame docked to the bottom of the screening frame is placed on the upper end of the support frame, a mounting frame is fixedly connected to the upper end of the screening frame, a dust box docked to the upper end of the screening net is fixedly connected to the upper end of the mounting frame, a limit shaft and a reciprocating screw are rotatably connected to the inner cavity of the mounting frame, and a scraper is movably sleeved on the outer side of the limit shaft and the reciprocating screw, and the scraper is threadedly connected to the reciprocating screw, a plurality of groups of vibration blocks are movably contacted at the bottom of the screening net, and a motor for driving the scraper to slide reciprocatingly transversely and driving the vibration block to rotate reciprocatingly up and down is fixedly installed on the outer side of the screening frame.

[0006] Preferably, the upper end of the support frame is rotatably connected to the bottom of the other side of the screening frame via a connecting shaft, and the upper end of the support frame is also fixedly connected to a fixing frame docked at the bottom of the screening frame, and a threaded rod abutting the bottom of the screening frame is inserted through the internal longitudinal thread of the fixing frame.

[0007] Preferably, an exhaust fan connected to the inner cavity is provided on one side of the dust box, a collecting pipe is fixedly provided at the bottom of the mounting frame, and air inlet holes connected to the upper end of the screening frame are evenly provided at the bottom of the collecting pipe, and the collecting pipe is connected to the interior of the dust box through a connecting pipe, and a box door is also provided on the outside of the dust box.

[0008] Preferably, the vibration block is evenly installed on the upper end of the mounting plate, a movable rod is fixedly connected to the upper end of the mounting plate, and a fixed block is fixedly connected to the outer side of the screening frame, a movable plate is movably arranged above the fixed block, and the movable rod movably passes through the fixed block and is fixedly connected to the bottom of the movable plate.

[0009] Preferably, the upper end of the mounting plate is connected to the bottom of the fixing block via a spring, the spring is sleeved on the outside of the movable rod, and the spring is in a contracted state in a default state.

[0010] Preferably, the motor is fixedly connected to the outside of the screening frame through a bracket, the outer end of the reciprocating screw rod movably passes through and extends to the outside of the screening frame, the motor power end is fixedly connected to the outer end of the reciprocating screw rod, and the outer part of the reciprocating screw rod is also fixedly sleeved with a rotating rod that contacts the upper end of the movable plate.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The utility model is provided with a motor and a transmission structure, so that the scraper can reciprocately scrape and level the grains accumulated on the upper end of the screening net while being driven by the motor, and at the same time the transmission structure can be used to knock and vibrate the bottom of the filter screen, so that the grains on the upper end of the filter screen can be relatively thoroughly distributed and vibrated for screening, thereby improving the overall screening effect. It has a significant improvement in practical effect and is worthy of promotion and use in the existing market. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 This is an enlarged schematic diagram of the structure at A of the utility model;

[0015] Figure 3 It is an enlarged schematic diagram of the structure at B of the utility model.

[0016] In the figure: 1-screening frame, 2-screening net, 3-support frame, 301-connecting shaft, 302-fixed frame, 303-threaded rod, 4-collecting frame, 5-installation frame, 6-dust box, 601-exhaust fan, 602-collection pipe, 603-air inlet, 604-connecting pipe, 7-limiting shaft, 8-reciprocating screw rod, 9-scraper, 10-vibration block, 1001-installation plate, 1002-movable rod, 1003-fixed block, 1004-movable plate, 11-motor, 1101-rotating rod, 12-discharge port. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical scheme and advantages of the implementation examples of the utility model clearer, the technical scheme in the implementation examples of the utility model will be clearly and completely described below in combination with the implementation examples of the utility model. Obviously, the implementation examples described are part of the implementation cases of the utility model, not all of the implementation cases. Based on the implementation examples in the utility model, all other implementation examples obtained by general technical and technical personnel in this field without creative work are within the scope of protection of the utility model.

[0018] Reference Manual Attached Figure 1-3 A grain screening device comprises a screening frame 1 and a screening net 2 arranged at the bottom of the screening frame 1, a discharge port 12 is arranged at the bottom of one side of the screening frame 1, and also comprises a support frame 3 for installing the screening frame 1, a collecting frame 4 docked at the bottom of the screening frame 1 is placed on the upper end of the support frame 3, a mounting frame 5 is fixedly connected to the upper end of the screening frame 1, a dust box 6 docked at the upper end of the screening net 1 is fixedly connected to the upper end of the mounting frame 5, a limit shaft 7 and a reciprocating screw rod 8 are rotatably connected to the inner cavity of the mounting frame 5, and a scraper 9 is movably sleeved on the outer side of the limit shaft 7 and the reciprocating screw rod 8, and the scraper 9 is threadedly connected to the reciprocating screw rod 8, a plurality of groups of vibration blocks 10 are movably contacted at the bottom of the screening net 2, and a motor 11 for driving the scraper 9 to slide reciprocatingly and horizontally and driving the vibration block 10 to rotate reciprocatingly up and down is fixedly installed on the outer side of the screening frame 1, and the vibration block 10 is evenly installed on The upper end of the mounting plate 1001 is fixedly connected with a movable rod 1002, and the outer side of the screening frame 1 is fixedly connected with a fixed block 1003, a movable plate 1004 is movably arranged above the fixed block 1003, and the movable rod 1002 is movably connected to the bottom of the movable plate 1004 after movably passing through the fixed block 1003, the upper end of the mounting plate 1001 is connected to the bottom of the fixed block 1003 through a spring, the spring is sleeved on the outer side of the movable rod 1002, and the spring is in a contracted state in the default state, the motor 11 is fixedly connected to the outer side of the screening frame 1 through a bracket, the outer side end of the reciprocating screw 8 movably passes through and extends to the outside of the screening frame 1, the power end of the motor 11 is fixedly connected to the outer side end of the reciprocating screw 8, and the outer part of the reciprocating screw 8 is also fixedly sleeved with a rotating rod 1101 that contacts the upper end of the movable plate 1004.

[0019] Based on the above structure, when the device is in use, the staff pours the grains to the upper end of the screening frame 1, and then starts the motor 11 through the external switch. The motor 11 drives the reciprocating screw 8 to rotate, and the reciprocating screw 8 drives the outer scraper 9 to slide back and forth laterally along the outer side of the limit shaft 7, and then the bottom of the scraper 9 is used to scrape the grains accumulated on the upper end of the screening net 2, so that the grains are spread evenly and dispersed at the upper end of the screening net 2. When the motor 11 is in rotation, the rotating rod 1101 on the outer side of the reciprocating screw rod 8 will be driven to rotate synchronously, and the rotating rod 1101 will indirectly contact the upper end of the movable plate 1004. When the rotating rod 1101 contacts the upper end of the movable plate 1004, the movable plate 1004 will be pressed down by the rotation of the rotating rod 1101, and the movable plate 1004 will press the movable rod 1002 down along the fixed block 1003. At this time, the spring stretches and drives the mounting plate 1001 at the bottom of the movable rod 1002 to move downward synchronously. When the rotating rod 1101 is released from contact with the movable plate 1004, the elastic contraction of the contraction spring drives the mounting plate 1001 and the movable rod 1002 to slide upward synchronously, thereby driving the vibration block 10 at the upper end of the mounting plate 1001 to knock on the bottom of the screening net 2 to vibrate and screen the grains spread flat on the upper end, so as to facilitate the screening of impurities therein and collect them through the collecting frame 4. Through the above structure, the grains on the upper end of the filter net can be relatively thoroughly distributed and vibrated, thereby improving the overall screening effect.

[0020] The upper end of the support frame 3 is rotatably connected to the bottom of the other side of the screening frame 1 through a connecting shaft 301, and the upper end of the support frame 3 is also fixedly connected to a fixing frame 302 that is butted against the bottom of the screening frame 1, and a threaded rod 303 that is butted against the bottom of the screening frame 1 is inserted through the longitudinal threads inside the fixing frame 302. The threaded rod 303 can be rotated and raised and lowered inside the fixing frame 302, and the angle of the screening frame 1 installed on the upper end of the support frame 3 can be adjusted through the connecting shaft 301, so that the grain filtered by the upper end of the filter screen 2 can be poured out from the discharge port 12.

[0021] Among them, an exhaust fan 601 connected to the inner cavity is arranged on one side of the dust box 6, a collection pipe 602 is fixedly arranged at the bottom of the mounting frame 5, and air inlet holes 603 connected to the upper end of the screening frame 1 are evenly arranged at the bottom of the collection pipe 602, and the collection pipe 602 is connected to the inside of the dust box 6 through the connecting pipe 604, and a box door is also arranged on the outside of the dust box 6. During the screening process, since there are not only impurities but also some dust in the grains, air can be extracted through the exhaust fan 601, and the air enters from the air inlet 603 to take away the dust generated during the screening vibration, and then passes through the collection pipe 602 and the connecting pipe 604 and is uniformly collected in the dust box 6, which is convenient for subsequent unified processing.

[0022] It should be noted that some parts not elaborated in the present utility model belong to the common known technology in the art, or can be directly purchased from the market, and can be obtained by technical and process personnel in the art without creative work. The specific connection method is extremely widely used in the art or in daily life, and will not be described in detail here.

[0023] In the description of the present invention, it should be understood that the terms "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0024] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0025] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians and process personnel in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0027] In the description of this specification, the description with reference to the terms "an implementation example", "some implementation examples", "example", "specific example", or "case" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, technical and process personnel in this field may combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0028] Although the implementation examples of the utility model have been shown and described above, it can be understood that the above implementation examples are illustrative and cannot be understood as limitations of the utility model. Ordinary technicians in the field can change, modify, replace and modify the above implementation examples within the scope of the utility model.

Claims

1. A grain screening device, comprising a screening frame (1) and a screening net (2) arranged at the bottom of the screening frame (1), a discharge port (12) being arranged at the bottom of one side of the screening frame (1), and a supporting frame (3) for mounting the screening frame (1), characterized in that: A collecting frame (4) docked at the bottom of the screening frame (1) is placed at the upper end of the support frame (3); a mounting frame (5) is fixedly connected to the upper end of the screening frame (1); a dust box (6) docked at the upper end of the screening net (1) is fixedly connected to the upper end of the mounting frame (5); a limit shaft (7) and a reciprocating screw (8) are rotatably connected to the inner cavity of the mounting frame (5); a scraper (9) is movably sleeved on the outer sides of the limit shaft (7) and the reciprocating screw (8); and the scraper (9) is threadedly connected to the reciprocating screw (8); a plurality of groups of vibration blocks (10) are movably contacted at the bottom of the screening net (2); and a motor (11) for driving the scraper (9) to slide reciprocatingly and horizontally and for driving the vibration block (10) to rotate reciprocatingly up and down is fixedly installed on the outer side of the screening frame (1).

2. A grain screening device according to claim 1, characterized in that: The upper end of the support frame (3) is rotatably connected to the bottom of the other side of the screening frame (1) via a connecting shaft (301); the upper end of the support frame (3) is also fixedly connected to a fixing frame (302) that is butted against the bottom of the screening frame (1); and a threaded rod (303) that is butted against the bottom of the screening frame (1) is inserted through the internal longitudinal threads of the fixing frame (302).

3. A grain screening device according to claim 2, characterized in that: An exhaust fan (601) communicating with the inner cavity is arranged on one side of the dust box (6); a collecting pipe (602) is fixedly arranged at the bottom of the mounting frame (5); air inlet holes (603) that are connected to the upper end of the screening frame (1) are evenly arranged at the bottom of the collecting pipe (602); the collecting pipe (602) is connected to the inside of the dust box (6) through a connecting pipe (604); and a box door is also arranged on the outside of the dust box (6).

4. A grain screening device according to claim 3, characterized in that: The vibration block (10) is evenly mounted on the upper end of the mounting plate (1001); the upper end of the mounting plate (1001) is fixedly connected to a movable rod (1002); a fixed block (1003) is fixedly connected to the outer side of the screening frame (1); a movable plate (1004) is movably arranged above the fixed block (1003); and the movable rod (1002) movably passes through the fixed block (1003) and is fixedly connected to the bottom of the movable plate (1004).

5. A grain screening device according to claim 4, characterized in that: The upper end of the mounting plate (1001) is connected to the bottom of the fixing block (1003) via a spring, the spring is sleeved on the outside of the movable rod (1002), and the spring is in a contracted state in a default state.

6. A grain screening device according to claim 5, characterized in that: The motor (11) is fixedly connected to the outside of the screening frame (1) via a bracket, the outer end of the reciprocating screw (8) movably penetrates and extends to the outside of the screening frame (1), the power end of the motor (11) is fixedly connected to the outer end of the reciprocating screw (8), and the outer part of the reciprocating screw (8) is also fixedly sleeved with a rotating rod (1101) that contacts the upper end of the movable plate (1004).

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