Bean combined harvesting vibrating screen with multi-layer screening function

Abstract

The invention discloses a bean combined harvesting vibrating screen with a multi-layer screening function, a second screen body of the vibrating screen receives materials and impurities falling from a first screen body below the first screen body, the first screen body comprises a material receiving plate and a plurality of material screening sheets which are arranged in sequence, the material receiving plate is of a solid plate-shaped structure, and the material screening sheets are arranged on the material receiving plate. The material receiving plate is used for receiving materials and impurities falling after a threshing procedure, the multiple material screening pieces are arranged at the output end of the material receiving plate at intervals, material falling gaps allowing the materials and the impurities to fall and be conveyed are formed between the material screening pieces, the material screening pieces incline in the input direction, and scraping teeth are formed at the upper ends of the material screening pieces in the width direction. When materials and impurities are conveyed to the material screening piece from the material receiving plate in a shaking mode, the impurities adhering to the materials are scraped away when the materials make contact with scraping teeth, and exhaust fans are arranged above the first screen body and the second screen body to exhaust the impurities. Through multi-layer screening and cooperation of the structure, separation of materials and impurities is promoted, and the subsequent manual re-screening rate is reduced.

Description

Technical Field

[0001] The invention relates to agricultural mechanical equipment, in particular to a bean combined harvesting vibration screen with a multi-layer screening function. Background Art

[0002] In the prior art, the applicant's previous patent number is 202210701962.4, and its name is an invention patent for a vibrating screen mechanism for edible beans, which sets a screen body to periodically shake the material, so that when the material and impurities are gradually shaken forward, the mixed impurities are squeezed and crushed during the shaking and stirring process and are sucked away by the exhaust fan, and the material reaches the discharge hopper for output. However, for some impurities that are attached to the material, they cannot be separated from the material during the entire shaking and conveying process, which means that a small amount of impurities will be finally collected with the material, and manual cleaning will be required later, which increases labor costs and reduces harvesting efficiency. Therefore, it is necessary to design a vibrating screen that can perform multiple screenings to improve the efficiency of impurity screening and collection. Summary of the invention

[0003] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a bean harvester vibrating screen with a multi-layer screening function, which ensures the separation of beans and impurities through multi-layer screening and overcomes the defects of traditional vibrating screens.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a bean combined harvesting vibrating screen with a multi-layer screening function, comprising a first screen body and a second screen body, the first screen body and the second screen body are driven by their respective driving mechanisms to perform periodic shaking, and the materials and impurities on the first screen body and the second screen body are sent from the input end to the output end, the second screen body receives the materials and impurities falling from the first screen body below the first screen body, the first screen body comprises a receiving plate and a plurality of screening sheets arranged in sequence, the receiving plate is a solid plate-shaped structure, and is used to receive the materials and impurities falling from the upper part after the threshing process, and the plurality of screening sheets The screen pieces are arranged at intervals at the output end of the receiving plate, and a drop gap is formed between the screen pieces for materials and impurities to fall and be transported. The screen pieces are inclined toward the input direction, and scraping teeth are formed on the upper ends of the screen pieces along the width direction. When materials and impurities are shaken and transported from the receiving plate to the screen pieces, the impurities adhered to the materials are scraped off when the materials contact the scraping teeth, and the materials and impurities fall from the drop gap or the outlet at the tail end of the screen piece to the second screen body below. The second screen body is longer than the first screen body. Exhaust fans are arranged above the first screen body and the second screen body. When the exhaust fans are working, the impurities shaken on the first screen body and the second screen body are sucked away.

[0005] As an improvement, a screen is further provided between the first screen body and the second screen body. The material and impurities falling from the first screen body fall onto the screen, and the screen vibrates reciprocatingly through an independent driving mechanism, so that the material and impurities pass through the mesh holes of the screen and fall toward the second screen body, and the material and the impurities adhered to it are separated when passing through the mesh holes of the screen.

[0006] As an improvement, a blower for blowing away impurities and an exhaust fan for collecting impurities are respectively arranged on two opposite sides of the screen.

[0007] As an improvement, the inclination angle of the screen piece is set to 30-60 degrees.

[0008] As an improvement, the material receiving plate forms a corrugated first material receiving trough along the conveying direction of the material and impurities.

[0009] As an improvement, the second screen body includes a solid screen plate, side plates surrounding the solid screen plate on three sides, and a discharge hopper located at the outlet end of the solid screen plate. The solid screen plate forms a wavy second material receiving trough along the conveying direction of materials and impurities.

[0010] As an improvement, the length of the solid screen plate at the output end and the width on both sides are greater than those of the first screen body, thereby receiving the falling materials at the rear end and both sides of the first screen body.

[0011] The beneficial effects of the present invention are as follows: the limitation of the original single-layer vibrating screen in shaking the screening material is overcome, the separation of materials and impurities is promoted through multi-layer screening and the coordinated structure, the problem of final impurity mixing caused by the adhesion of materials and impurities is avoided, and the manual re-screening rate is effectively reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the present invention. DETAILED DESCRIPTION

[0013] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0014] like Figure 1As shown, a specific embodiment of the bean combined harvesting vibration screen with a multi-layer screening function of the present invention comprises a first screen body 1 and a second screen body 2. The first screen body 1 and the second screen body 2 are driven by respective driving mechanisms 3 to perform periodic shaking, so that the materials and impurities on the first screen body 1 and the second screen body 2 are sent from the input end to the output end. The second screen body 2 receives the materials and impurities falling from the first screen body 1 below the first screen body 1. The first screen body 1 comprises a receiving plate 11 and a plurality of screening pieces 12 arranged in sequence. The receiving plate 11 is a solid plate-shaped structure, which is used to receive the materials and impurities falling from the upper part after the threshing process. The plurality of screening pieces 12 are arranged at intervals on the receiving plate 1. 1, a material drop gap 13 is formed between the screen pieces 12 for materials and impurities to fall and be transported, the screen pieces 12 are inclined toward the input direction, and scraping teeth 14 are formed on the upper ends of the screen pieces 12 along the width direction. When materials and impurities are shaken and transported from the receiving plate 11 to the screen pieces 12, the impurities adhering to the materials are scraped off when the materials contact the scraping teeth 14, and the materials and impurities fall from the material drop gap 13 or the tail end outlet of the screen piece 12 to the second screen body 2 below. The second screen body 2 is longer than the first screen body 1. Exhaust fans 4 are arranged above the first screen body 1 and the second screen body 2. When the exhaust fans 4 are working, the impurities shaken on the first screen body 1 and the second screen body 2 are sucked away.

[0015] When the present invention is in use, the overall bean harvester can refer to the invention patents previously applied for by the applicant, patent number 202110849682.3, named a wind-speed broad bean harvester invention patent, and patent number 202110783112.9, named a pneumatic conveying edible bean harvester invention patent. The threshing mechanism is supported above the input end of the receiving plate 11 of the first screen body 1 in the present invention. The threshing mechanism separates the edible bean seeds (hereinafter referred to as materials) and the bean pod shells (hereinafter referred to as impurities). In addition to the impurities headed by the bean pod shells, there are also impurities such as stems, branches and leaves mixed in during the conveying and threshing process. The periodic shaking state of the first screen body 1 and the second screen body 2 refers to the applicant's previous invention patent. The connecting rod group driving mechanism 3 can be specifically set to a driving motor, an eccentric wheel and a connecting rod group that are linked in sequence. The driving motor drives the eccentric wheel to rotate, and the eccentric wheel drives the connecting rod group to swing periodically. The connecting rod group is hinged at the input ends of the first screen body 1 and the second screen body 2, thereby driving the input ends of the first screen body 1 and the second screen body 2 to shake, and the material and impurities are periodically transported to the output end.

[0016] As an improvement, the added first screen body 1 realizes the first-level screening function. First, the material and impurities are transported backward in an orderly manner from the receiving plate 11 with the shaking, and are regularly turned over to promote the separation of the material and the impurities, and the impurities are squeezed and crushed by each other; after the material and impurities leave the receiving plate 11 and reach the screening piece 12, the material and impurities fall to the scraping teeth 14 at the upper end of the screening piece 12 by virtue of the vacant state of the shaking. The scraping teeth 14 do not need to be set too sharp, thereby ensuring that the material itself will not be damaged. The contact, friction or tumbling of the impurities with the scraper 14 promotes the scraping of the material and the impurities thereon. If the material and impurities are in a falling position that can pass through the blanking gap 13, they will directly fall from the blanking gap 13 to the subsequent reception. If the material and impurities cannot fall normally due to the volume or placement state, they will continue to be transported backward with the shaking of the first screen body 1, and the adhering materials and impurities can continue to be separated by the subsequent scraper 14. With the shaking transportation, the material and impurities can fall from different blanking gaps 13 or from the tail end outlet. The first screen body 1 is provided with an exhaust fan 4, and the air inlet of the exhaust fan 4 is set to cover the top of the screen sheet 12 to ensure the normal falling of the material and impurities above the receiving plate 11, and the impurities at the position of the screen sheet 12 are sucked away and collected in the first layer. The scraper 14 can be set to a structure similar to a rack, covering the position where the material and impurities are transported in the width direction, so as to better perform the separation process. The falling materials and impurities are received by the second screen body 2. The second screen body 2 is larger than the first screen body 1. While the materials and impurities are being shaken and transported, they are fully dispersed and their positions are changed. The impurities can be effectively squeezed and crushed in the process, and the impurities are better turned over. The impurities are crushed to reduce their size and can be smoothly sucked away by the exhaust fan 4. The exhaust fan 4 provided with the second screen body 2 is matched with the exhaust fan 4. The air inlet of the exhaust fan 4 is set to cover the rear section of the second screen body 2 and the projection position that does not overlap with the first screen body 1, ensuring the normal falling of the materials and impurities at the first screen body 1. After the materials and impurities are fully shaken in the front section, the impurities can be better sucked away and collected in the second layer in the rear section. The first screen body 1 and the second screen body 2 can use the same exhaust fan 4, and the exhaust pipeline is led out to the required position through the same exhaust fan 4 to realize the function.

[0017] As an improved specific implementation method, a screen 5 is further arranged between the first screen body 1 and the second screen body 2. The material and impurities falling from the first screen body 1 fall onto the screen 5. The screen 5 vibrates reciprocatingly through the independent driving mechanism 3, so that the material and impurities pass through the mesh holes of the screen 5 and fall toward the second screen body 2. When the material passes through the mesh holes of the screen 5, the material and the impurities adhered thereto are separated.

[0018] like Figure 1As shown, by setting the screen 5, an extra layer of screening is performed, and the materials and impurities screened by the first layer of the first screen body 1 fall onto the screen 5. The driving mechanism 3 of the screen 5 can be set to a driving motor to drive the screen 5 to perform horizontal reciprocating vibration, thereby promoting the materials and impurities to fall from the mesh holes of the screen 5. When the materials pass through the mesh holes, they contact and collide with the edges of the mesh holes as the screen 5 reciprocates, thereby promoting the separation of the materials and the impurities adhered thereto, thereby forming a comprehensive screening function of the upper, middle and lower three layers by the first screen body 1, the screen 5 and the second screen body 2.

[0019] As an improved specific implementation manner, a blower 6 for blowing away impurities and an exhaust fan 4 for collecting impurities are respectively arranged on two opposite sides of the screen 5.

[0020] like Figure 1 As shown, the exhaust fan 4 at the screen 5 can be the same as the first screen body 1 and the second screen body 2, and the exhaust pipeline is led out to one side of the screen 5 through the same exhaust fan 4, thereby controlling the equipment cost; then a blower 6 is arranged on the other side, and in the process of the material and impurities being vibrated and falling, the impurities with smaller mass are blown to the exhaust fan 4 on the other side by the blower 6, and the synchronous exhaust fan 4 absorbs the impurities, thereby realizing the impurity collection of this layer and avoiding the problem of accumulation and blockage that may occur at the screen 5.

[0021] As an improved specific implementation manner, the inclination angle of the screen piece 12 is set to 30-60 degrees.

[0022] like Figure 1 As shown, according to the specifications and quality of the materials, the inclination angle of the screen sheet 12 can be flexibly adjusted so that the materials transported backward by the shaking can contact the scraping teeth 14 in a more suitable falling state, thereby achieving the desired scraping effect of materials and impurities.

[0023] As an improved specific implementation manner, the material receiving plate 11 forms a wave-shaped first material receiving trough 110 along the conveying direction of the material and impurities.

[0024] like Figure 1 As shown, the continuous wavy first material receiving trough 110 can receive materials and impurities in batches, transport them backward in an orderly manner with each shaking, and cause the impurities to collide, squeeze and crush each other in each receiving impact, so as to facilitate subsequent separation from the material and smooth extraction and collection by the exhaust fan 4.

[0025] As an improved specific implementation, the second screen body 2 includes a solid sieve plate 21, side plates 22 surrounding the solid sieve plate 21 on three sides, and a discharge hopper 23 located at the outlet end of the solid sieve plate 21. The solid sieve plate 21 forms a wavy second material receiving trough 210 along the conveying direction of materials and impurities.

[0026] like Figure 1As shown, the continuous wavy second material receiving trough 210 formed by the solid sieve plate 21 can receive materials and impurities in batches, transport them backward in an orderly manner with each shaking, and cause the impurities to collide, squeeze and crush each other in each receiving impact, so as to facilitate the separation from the subsequent materials and be smoothly sucked away and collected by the exhaust fan 4; the discharge hopper 23 at the outlet end collects the materials and outputs them to the subsequent sequence, and the side panels 22 on three sides block and contain the materials and impurities.

[0027] As an improved specific implementation, the length of the solid sieve plate 21 at the output end and the width on both sides are greater than those of the first sieve body 1 , thereby receiving the falling materials at the rear end and both sides of the first sieve body 1 .

[0028] like Figure 1 As shown, as the material and impurities are shaken and transported on the first screen body 1, the material and impurities can be finally transported to the tail end for dropping, or dropped from both sides. The solid screen plate 21 is larger than the first screen body 1 in three directions at the output end and on both sides, so as to well receive the material and impurities.

[0029] The above are only preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A bean harvesting vibrating screen with a multi-layer screening function, comprising a first screen body (1) and a second screen body (2), wherein the first screen body (1) and the second screen body (2) are driven by respective driving mechanisms (3) to perform periodic shaking, so that materials and impurities on the first screen body (1) and the second screen body (2) are sent from an input end to an output end, characterized in that: The second screen body (2) receives the material and impurities falling from the first screen body (1) below the first screen body (1). The first screen body (1) comprises a receiving plate (11) and a plurality of screen pieces (12) arranged in sequence. The receiving plate (11) is a solid plate-shaped structure, used for receiving the material and impurities falling from above after the threshing process. The plurality of screen pieces (12) are arranged at intervals at the output end of the receiving plate (11). A material drop gap (13) is formed between the screen pieces (12) for the material and impurities to drop and transport. The screen pieces (12) are inclined toward the input direction, and the screen pieces (12) are The upper end of the screen (1) is formed with scraping teeth (14) along the width direction. When the material and impurities are transported from the receiving plate (11) to the screen sheet (12) by shaking, the impurities adhering to the material are scraped off when the material contacts the scraping teeth (14). The material and impurities fall from the material gap (13) or the tail end outlet of the screen sheet (12) to the second screen body (2) below. The second screen body (2) is longer than the first screen body (1). An exhaust fan (4) is arranged above the first screen body (1) and the second screen body (2). When the exhaust fan (4) is in operation, the impurities shaken on the first screen body (1) and the second screen body (2) are sucked away.

2. The bean harvesting vibrating screen with multi-layer screening function according to claim 1, characterized in that: A screen (5) is also provided between the first screen body (1) and the second screen body (2). The material and impurities falling from the first screen body (1) fall onto the screen (5). The screen (5) is reciprocated by an independent driving mechanism (3), so that the material and impurities pass through the meshes of the screen (5) and fall toward the second screen body (2). When the material passes through the meshes of the screen (5), the material and the impurities adhering thereto are separated.

3. The bean harvesting vibrating screen with multi-layer screening function according to claim 2, characterized in that: The screen (5) is provided with a blower (6) for blowing away impurities and an exhaust fan (4) for collecting impurities on two opposite sides.

4. The bean harvesting vibrating screen with multi-layer screening function according to claim 1, 2 or 3, characterized in that: The inclination angle of the screen piece (12) is set to 30-60 degrees.

5. The bean harvesting vibrating screen with multi-layer screening function according to claim 1, 2 or 3, characterized in that: The material receiving plate (11) forms a wave-shaped first material receiving trough (110) along the conveying direction of the material and impurities.

6. The bean harvesting vibrating screen with multi-layer screening function according to claim 1, 2 or 3, characterized in that: The second screen body (2) comprises a solid screen plate (21), side plates (22) surrounding the solid screen plate (21) on three sides, and a discharge hopper (23) located at the outlet end of the solid screen plate (21), and the solid screen plate (21) forms a wavy second material receiving trough (210) along the conveying direction of materials and impurities.

7. The bean harvesting vibrating screen with multi-layer screening function according to claim 6, characterized in that: The length of the solid sieve plate (21) at the output end and the width on both sides are greater than those of the first sieve body (1), thereby receiving the falling materials at the rear end and both sides of the first sieve body (1).

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