Distributing device and gyratory screen

Abstract

The present application belongs to the technical field of rotary screen. The distributing device comprises: a feeding section, a feeding channel is arranged in the feeding section; a material equalizing section, which is located downstream of the feeding section, is used for receiving and equally distributing the material transported by the feeding channel; a distributing section, which is located downstream of the material equalizing section, is used for receiving and transporting the material transported by the material equalizing section to different screen boats arranged in an up-down manner, and a material channel control mechanism is arranged in the distributing section to control the material to enter different screen boats. The present application is used to solve the technical problem that the material equalizing mechanism of the existing rotary screen cannot distribute the material. The present application also discloses a rotary screen comprising the above distributing device. The present application is used to solve the problem that the existing rotary screen cannot simultaneously meet the parameter switching and screening switching requirements between different materials.

Description

Technical Field

[0001] This invention belongs to the field of rotary screen technology, specifically relating to a material distribution device and a rotary screen including the above-mentioned material distribution device. Background Technology

[0002] With the continuous improvement of people's living standards, the demand for aquatic products, livestock and poultry meat is increasing year by year, leading to a growing demand for feed from livestock enterprises. Increased feed mill capacity means that screening equipment needs a larger screening area. Currently, most grading equipment has a single-unit structure, capable of screening only a single material. If screening two or more materials is required, it can only be achieved by changing the screen surface. Using traditional single-layer screens requires a larger site, and the daily operation (such as screen surface replacement) and maintenance of the screening equipment become increasingly difficult as the equipment size increases. Therefore, customers urgently desire equipment that improves operational convenience and reduces labor intensity in daily use. Summary of the Invention

[0003] The first objective of this invention is to provide a material distribution device to solve the technical problem that the material distribution mechanism of the existing rotary screen cannot distribute materials.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a material dispensing device, comprising: Feeding section, wherein a feeding channel is provided; The material equalization section is located downstream of the feeding section and is used to receive and evenly distribute the material conveyed by the feeding channel. The material distribution section is located downstream of the material equalization section. The material distribution section is used to receive and transport the material transported by the material equalization section to different screen boats arranged vertically. The material distribution section is equipped with a material channel control mechanism to control the material entering different screen boats. That is, the material can be switched between three conveying states: the first conveying state is to transport the material to the upper screen boat; the second conveying state is to transport the material to the lower screen boat; and the third conveying state is to transport the material to both the upper and lower screen boats at the same time.

[0005] The material distribution device of the present invention can uniformly feed materials into a multi-layer screen ship. The material distribution device is also equipped with a material channel control device, which can control the material to enter a specific layer of the multi-layer screen ship.

[0006] To address the technical problem of how to implement the material equalization section, the present invention adopts the following technical solution, wherein the material equalization section includes: equalization box; A material distribution assembly is disposed within the material distribution box, the material distribution assembly comprising: The first material equalizer has its outlet end inclined downward relative to its inlet end; the first material equalizer includes a material equalizer plate. A second material homogenizing member, located downstream of the first material homogenizing member; the second material homogenizing member and the first material homogenizing member are arranged opposite to each other and in an overlapping manner; the discharge end of the second material homogenizing member is arranged to be inclined downward relative to its feed end; the second material homogenizing member comprises: A second material homogenizing plate; Material homogenizing vertical plates, disposed on the second material homogenizing plate, the material homogenizing vertical plates are radially distributed centered on the middle of the feed end of the second material homogenizing plate, material homogenizing channels are formed between the material homogenizing vertical plates, and the material homogenizing channels gradually expand along the material conveying direction.

[0007] In the present invention, the right sides of the material homogenizing vertical plates are all within the range of the rightward extension of the first material homogenizing member. The arrangement of the above material homogenizing vertical plates can make the material spread evenly in the arrangement direction of the material homogenizing vertical plates, and then when the material is conveyed to the sieve body, it can spread relatively evenly in the width direction of the sieve body. Among them, the tower-shaped structure can ensure that the amount of material entering each material homogenizing channel is the same as much as possible, and the left end of the first material homogenizing channel is enlarged to further disperse the material, enhancing the material homogenizing effect.

[0008] To solve the technical problem of how to realize the material homogenizing section, the present invention adopts the following technical solution, and the material homogenizing section comprises: A material homogenizing box body; A material homogenizing assembly, disposed in the material homogenizing box body, the material homogenizing assembly comprises: A first material homogenizing assembly, comprising a third material homogenizing plate and a fourth material homogenizing plate, the fourth material homogenizing plate is located downstream of the third material homogenizing plate; the third material homogenizing plate and the fourth material homogenizing plate are arranged opposite to each other and in an overlapping manner, and are arranged to be inclined downward; A second material homogenizing assembly, located downstream of the first material homogenizing assembly, the second material homogenizing assembly comprises a plurality of fifth material homogenizing plates arranged at intervals, the middle fifth material homogenizing plate is arranged vertically, and the upper parts of the fifth material homogenizing plates on both sides are arranged obliquely and close to the middle fifth material homogenizing plate; material homogenizing channels are formed between the fifth material homogenizing plates, and the material homogenizing channels gradually expand along the material feeding direction.

[0009] The third material homogenizing plate and the fourth material homogenizing plate are installed to be inclined downward, which ensures the material homogenizing effect and takes into account the material discharge speed. In the present invention, all the fifth material homogenizing plates are within the extended range of the first material homogenizing assembly. The arrangement of the above fifth material homogenizing plates can make the material spread evenly in the arrangement direction of the fifth material homogenizing plates, and then when the material is conveyed to the upper sieve boat or the lower sieve boat, it can spread relatively evenly in the width direction of the sieve boat. Among them, the tower-shaped structure can ensure that the amount of material entering each second material homogenizing channel is the same as much as possible, and the lower end of the second material homogenizing channel is enlarged to further evenly disperse the material, enhancing the material homogenizing effect.

[0010] To solve the technical problem of how to realize the material distributing section and the material channel control mechanism, the present invention adopts the following technical solution. The material distributing section comprises a material distributing box body, and the material distributing box body and the material homogenizing box body form a "convex"-shaped structure; The material distribution box is equipped with the material channel control mechanism, which includes: Material sorting plate; A rotary material guiding assembly is spaced apart from the material distributing plate; a material distributing port is formed between the rotary material guiding assembly and the material distributing plate, the material distributing port including a first material distributing port and a second material distributing port spaced apart, the rotary material guiding assembly comprising: Guide plate 1; A second guide plate is disposed on the rotating assembly, the second guide plate being located above the first guide plate, and the rotating assembly being in contact with the first guide plate; Under the action of the rotating component, the second guide plate rotates and comes into contact with the corresponding second distribution port, closing the second distribution port, and the material enters the lower screen vessel through the first distribution port; the second guide plate rotates in the opposite direction and comes into contact with the corresponding first distribution port, closing the first distribution port, and the material enters the upper screen vessel through the second distribution port.

[0011] The material distribution device of the present invention is divided into multiple first distribution ports and second distribution ports by a number of rotating material guiding components and a number of material distributing plates. The rotating material guiding components can rotate left and right. Under the action of the rotating components, the second material guiding plate rotates and comes into contact with the corresponding material distributing plate on the second distribution port, thus closing the second distribution port. The material enters the lower screening vessel through the first distribution port. The second material guiding plate rotates in the opposite direction and comes into contact with the corresponding material distributing plate on the first distribution port, thus closing the first distribution port. The material enters the upper screening vessel through the second distribution port.

[0012] To address the technical problem of how to implement the rotating component, the present invention adopts the following technical solution, wherein the rotating component includes: An active rotating shaft is rotatably mounted on the material distribution box; a corresponding guide plate is mounted on the active rotating shaft. A driven rotating shaft is rotatably mounted on the material distribution box; the driven rotating shaft is connected to the driving rotating shaft via a connecting rod assembly; a corresponding guide plate is provided on the driven rotating shaft; The linkage assembly includes a first linkage and a second linkage. A plurality of second linkages are spaced apart along the length of the first linkage. One end of the second linkage is rotatably connected to the first linkage, and the other end of the second linkage is connected to the corresponding driven rotation shaft or the driving rotation shaft. A power element is installed on the material distribution box, and the power element drives and connects to the active rotating shaft. When the power element is activated, it drives the active rotating shaft to rotate, which in turn drives the second guide plate on it to rotate. Under the drive of the connecting rod assembly, the driven rotating shaft rotates synchronously, which allows the second guide plate to be in different positions, thereby controlling the material to enter different screen boats.

[0013] To solve the technical problem of rotation between the active (driven) rotating shaft and the second connecting rod, the present invention adopts the following technical solution: an anti-rotation component is provided on one end of the active rotating shaft or the driven rotating shaft and the corresponding second connecting rod, including: A polygonal boss is provided on the shaft head of the active rotating shaft or the driven rotating shaft; The second connecting rod has a polygonal connecting hole at its connecting end. The polygonal connecting hole cooperates with the polygonal boss to effectively prevent rotation between the active (driven) rotating shaft and the second connecting rod.

[0014] To solve the technical problem of rotation between the first and second connecting rods, the present invention adopts the following technical solution: a rotating assembly is provided between the second connecting rod and the first connecting rod, comprising: A circular hole is provided at the other end of the second connecting rod; The first connecting rod is provided with spaced circular holes. A pin is set in the round hole of the second connecting rod and the corresponding round hole of the first connecting rod and locked with a cotter pin to ensure smooth rotation.

[0015] The second objective of this invention is to provide a rotary screen to solve the technical problem that existing screening equipment cannot simultaneously meet the requirements for parameter switching and screening switching between different materials.

[0016] To solve the above-mentioned technical problems, the present invention adopts the following technical solution, wherein the rotary screen comprises: frame; The screen body comprises several layers of screen boats arranged from top to bottom; The material distribution device described in any of the above items is installed at the feed end of the screen body and is used to uniformly convey materials to screen boats of different layers; The discharge collection device is installed at the discharge end of the screen body and is used to collect and recycle the finished product and impurities after screening by the screen boat. A transmission device is connected to the screen body, and the transmission device is used to drive the screen body to rotate.

[0017] The rotary screen of this invention includes an upper screen boat and a lower screen boat, each with a discharge collection device. The rotary grading screen of this invention includes a material distribution device. The cooperation between the material equalization mechanism and the material distribution mechanism can make the material spread evenly in the direction of the material equalization plate, and then spread relatively evenly in the width direction of the screen boat. At the same time, it can also control the material to enter different screen boats, enabling the same equipment to screen different materials, realizing multi-purpose use, and meeting the requirements for parameter switching and screening switching between different materials.

[0018] To solve the technical problems of the screening boat, the present invention adopts the following technical solution: a screen is installed on the screening boat, and a first screening zone is formed above the screen; the discharge end of the screen is inclined downward relative to the feed end of the screen. The screen mesh sizes of adjacent screen boats may be the same or different.

[0019] The present invention sets the screen at an angle, which facilitates the screen body to send the screened finished material and impurities into the corresponding material channel of the discharge collection device. When the screen body rotates, the screened finished material and impurities are transported into the corresponding material channel under the action of gravity, thereby improving the overall efficiency of the machine.

[0020] To solve the technical problem of material clogging during screening, the present invention adopts the following technical solution: a screen cleaning component is installed on the screening vessel to clean the material stuck on the screen during the screening process; the screen cleaning component includes: A bracket is used to support the screen; a second screening section is formed below the bracket; An elastic cleaning ball is disposed within the bracket, and the elastic cleaning ball is located below the screen.

[0021] The cleaning ball support bracket provides support for the screen and the cleaning balls; the cleaning balls are used to remove material stuck on the screen during the screening process, preventing screen clogging and ensuring the screening performance of the equipment. To address the technical problem of uneven screen cleaning caused by uneven distribution of elastic cleaning balls on the bracket, this invention adopts the following technical solution: a partition frame is provided on the bracket to evenly distribute the elastic cleaning balls within the bracket. In this invention, the elastic cleaning balls 3122 are evenly distributed within several partition frames of the cleaning ball bracket 3121, ensuring uniform screen cleaning.

[0022] To solve the technical problem of safe operation of the screen body, the present invention adopts the following technical solution: the rotary screen includes a dynamic monitoring device for detecting the movement of the screen body, and controlling the transmission device to stop when the screen body operates abnormally. The dynamic monitoring device includes: A touch ring is disposed on the screen body, and the touch ring rotates with the screen body; A limit switch assembly is mounted on the frame. When the limit switch assembly touches the contact ring, it indicates that the screen body is operating abnormally.

[0023] The dynamic monitoring device of this invention is used to detect the movement of the screen body. When the operation is abnormal, it can control the transmission device to stop, thereby improving the overall safety performance of the machine.

[0024] To address the technical problem of how to implement a limit switch assembly, the present invention adopts the following technical solution, wherein the limit switch assembly includes: Mounting brackets are installed on the frame; Limit switch, mounted on the mounting bracket; A spring probe is installed on the limit switch. When the spring probe touches the contact ring, it indicates that the screen body is operating abnormally.

[0025] When the screen body operates abnormally, the contact ring will touch the spring probe, at which point the limit switch will activate, disconnecting the power supply to the drive unit and stopping the combined rotary screen. This device greatly improves the safety performance of the combined rotary screen.

[0026] To solve the technical problem of how to implement the suspension assembly, the present invention adopts the following technical solution: the screen body is suspended on the frame by the suspension assembly, the suspension assembly is set at the four corners of the screen body, and the suspension assembly includes: a suspension body, the upper part, middle part and lower part of the suspension body are respectively connected to the upper screen boat, the transmission device and the lower screen boat; A flexible suspension rod is provided, with one end connected to the frame and the other end connected to the suspension body; the flexible suspension rod can deform as the screen body rotates.

[0027] In this invention, four suspension components are respectively located at the four corners of the screen body, which facilitates the smooth rotation of the screen body.

[0028] To solve the technical problem of the screen body falling due to the breakage of the flexible suspension rod 702, the present invention adopts the following technical solution: the suspension assembly also includes a safety rope to prevent the screen body from falling when the flexible suspension rod breaks during the operation of the screen body; One end of the safety rope is connected to the frame, and the other end of the safety rope is connected to the suspension body.

[0029] If the flexible suspension rod breaks abnormally during the operation of the screen body, the safety wire rope can play a role in preventing the screen body from falling.

[0030] To address the technical problem of how to implement the discharge collection device, the present invention adopts the following technical solution, wherein the discharge collection device includes: The finished product screening and collection area is used to collect the finished product material from the first screening section; connecting channels are set between the finished product screening and collection areas of different screening boats; The small impurity screening and collection area is located below the finished product screening and collection area, and a connecting channel is provided between the small impurity screening sections of the screening vessel; the small impurity screening and collection area is used to collect small impurities from the second screening section. When the screen body rotates, the screened finished materials and impurities are transported to the corresponding finished product screening and collection area and the small impurity screening and collection area under the action of gravity.

[0031] In this invention, the finished product screening and collection areas of the upper and lower screening vessels are connected, and the small impurity screening and collection areas of the upper and lower screening vessels are also connected. The connecting channels are arranged on the left and right sides, which takes up little space.

[0032] To solve the technical problem of the screen feed end being exposed to the environment, the present invention adopts the following technical solution: the feed end of the screen boat is equipped with a rotating door to shield the screen, and a material guiding channel is provided on the rotating door to evenly guide the material into different screen boats arranged vertically.

[0033] The rotating gate of this invention is located at the front end of the screen body and is used to shield the screens installed in the upper and lower screen vessels. The rotating gate is equipped with a material guiding channel, which can evenly guide the material into the upper and lower screen vessels. Attached Figure Description

[0034] Figure 1 The three-dimensional material dispensing device of the present invention Figure 1 ; Figure 2 This is a cross-sectional view of the material distribution device (feeding end, equalization section) of the present invention; Figure 3 This is a schematic diagram of the structure of the second material equalization component in the material equalization section of the material distribution device of the present invention; Figure 4 This is a schematic diagram of the material distribution section of the material distribution device of the present invention. Figure 2 ; Figure 5 This is a schematic diagram of the structure of the first material equalization component in the material equalization section of the material distribution device of the present invention; Figure 6 This is a schematic diagram of the structure of the second material equalization component in the material equalization section of the material distribution device of the present invention; Figure 7 This is a schematic diagram of the material dispensing state of the material dispensing device of the present invention; Figure 8 This is a schematic diagram of the second material distribution state of the material distribution device of the present invention; Figure 9 This is a schematic diagram of the material distribution state three of the material distribution device of the present invention; Figure 10 The three-dimensional material dispensing device of the present invention Figure 2 ; Figure 11 This is a schematic diagram of the structure of the rotating component of the material dispensing device of the present invention; Figure 12 This is a schematic diagram of the active rotating shaft and power element of the rotating component of the material dispensing device of the present invention; Figure 13 This is a schematic diagram of the structure of the active rotating shaft of the rotating component of the material dispensing device of the present invention; Figure 14 This is a schematic diagram of the structure of the second connecting rod of the rotating assembly of the material dispensing device of the present invention; Figure 15 This is a schematic diagram of the mounting base of the rotating component of the material dispensing device of the present invention; Figure 16 This is a schematic diagram of the assembly structure of the driven rotating shaft and the corresponding second connecting rod of the rotating component of the material dispensing device of the present invention; Figure 17 This is a schematic diagram of the material separation component structure for screening four types of materials according to the present invention.

[0035] Figure 18 This is the three-dimensional rotary screen of the present invention. Figure 1 ; Figure 19 This is the three-dimensional rotary screen of the present invention. Figure 2 ; Figure 20 This is a cross-sectional view of the rotary screen of the present invention; Figure 21 yes Figure 19 Enlarged view of section A in the middle; Figure 22 This is a front view of the rotary screen of the present invention; Figure 23 yes Figure 22 Enlarged view of section B; Attached image description: 10 rotary screens; 100 racks; 200 Material distribution device; 210 Feeding section; 211 Feed inlet; 220 Material equalization section; 221 First material equalization component; 2211 Material equalization plate one; 222 Second material equalization component; 2221 Material equalization plate two; 2222 Material equalization vertical plate; 2223 Material equalization channel one; 223 First material equalization assembly; 2231 Material equalization plate three; 2232 Material equalization plate four; 224 Second material equalization assembly; 2241 Material equalization plate five; 2242 Material equalization channel two; 225 Material equalization box; 230 Material distribution section; 231 Material distribution box; 232 Material distribution plate; 233 Rotary material guide assembly; 2331 Material guide plate one; 2332 Material guide plate two; 240 First feed inlet; 250 Second feed inlet; 260 Rotating assembly; 261 Driving rotating shaft; 2611 Mounting plane one; 2612 Square boss; 262 Driven rotating shaft; 2621 Mounting plane two; 263 First connecting rod; 264 Second connecting rod; 2641 Square hole; 2642 Circular hole; 265 Bearing with seat; 266 Power element; 267 Mounting support; 2671 First mounting base; 2672 Second mounting base; 268 Coupling; 300 Screen body; 310 Upper screen vessel; 311 Screen mesh; 312 Screen cleaning assembly; 3121 Bracket; 3122 Elastic cleaning ball; 320 Lower screen vessel; 400 Discharge collection device; 401 Finished product screening and collection area; 402 Small impurity screening and collection area; 403 Connecting channel one; 404 Connecting channel two.

[0036] 500 Transmission unit; 501 Drive unit; 600 revolving door; 610 upward revolving door; 620 downward revolving door; 700 Suspension assembly; 701 Suspension body; 702 Flexible boom; 703 Safety wire rope; 800 Dynamic monitoring device; 801 Limit switch; 802 Switch mounting bracket; 803 Contact ring; 804 Spring probe. Detailed Implementation

[0037] Example 1 like Figure 1 As shown, the material distribution device 200 includes a feeding section 210, a material equalization section 220, and a material distribution section 230.

[0038] The feeding section 210 has a feeding channel through which materials can pass. Specifically, such as... Figure 1 and Figure 2 As shown, the feeding section 210 is provided with a feeding port 211. The material enters from the feeding port 211, passes through the equalization section 220 and the distribution section 230, and then enters the screen body.

[0039] The material equalization section 220 is located downstream of the feeding section 210 and is used to receive and evenly distribute the material conveyed by the feeding channel. In one embodiment, the material equalization section 220 has a first material equalization component 221 and a second material equalization component 222 that can evenly distribute the material. The second material equalization component 222 is located downstream of the first material equalization component 221, and the first and second material equalization components 221 are connected to the inner side of the material equalization section 220 by welding. The material flows out of the first material equalization component 221 and then passes through the second material equalization component 222. To ensure the material equalization effect and take into account the material discharge speed, the first material equalization component 221 is installed at an angle downward, that is, the first material equalization component 221 is inclined downward toward the outlet direction of the feeding section 201. Preferably, the first material equalization component 221 is a material equalization plate 2211. The material equalization plate 2211 is preferably L-shaped.

[0040] like Figure 2 As shown, under normal operating conditions, the right end of the first material distribution element 221 is lower than its left end. The material discharge channel formed by the first material distribution element 221 and the outer wall of the material distribution section 220 allows the material to flow in a predetermined direction. In use, the first material distribution element 221 can be directly installed into the material distribution section 220.

[0041] like Figure 7 and Figure 8As shown, the second material leveling component 222 includes a second material leveling plate 2221, which is also inclined downward toward the outlet of the feed section 210.

[0042] To ensure uniform material distribution, the second material distribution component 222 is further provided with several material distribution vertical plates 2222. In one embodiment, there are six material distribution vertical plates 2222, which are constructed in a tower-like structure. Specifically, the upper ends of the six material distribution vertical plates 2222 converge from the right end of the second material distribution plate 2221 and gradually disperse towards the left end. The six material distribution vertical plates 2222 form multiple material distribution channels 2223, which gradually enlarge from right to left. The right side of each material distribution vertical plate 2222 is within the range extending to the right of the first material distribution component 221. The arrangement of the material distribution vertical plates 2222 allows the material to be evenly spread in the direction of the material distribution vertical plates 2222, so that when the material is conveyed to the screen body, it can be spread relatively evenly in the width direction of the screen body. The tower-like structure ensures that the amount of material entering each material distribution channel 2223 is as uniform as possible. The left end of the material distribution channel 2223 is enlarged to further disperse the material and enhance the material distribution effect. Understandably, the number of material distribution plates 2222 is not limited to 6.

[0043] The first uniform material distribution unit 221 and the second uniform material distribution unit 222 need to be set up simultaneously. The material is first dispersed by the first uniform material distribution unit 221, and the dispersed material is then sprinkled onto the second uniform material distribution unit 222 for further dispersion, thereby ensuring a better uniform material distribution effect; moreover, the second uniform material distribution unit 222 is equipped with a uniform material distribution plate 2222, so the uniform material distribution effect is more obvious after the second uniform material distribution.

[0044] In one embodiment, the material distribution section 220 may also employ, for example... Figure 4 The structure shown has a material equalization section 220 having a first material equalization component 223 and a second material equalization component 224 that can evenly distribute materials, with the second material equalization component 224 located downstream of the first material equalization component 223.

[0045] like Figure 5 As shown, the first material equalization component 223 includes material equalization plate three 2231 and material equalization plate four 2232. In order to ensure the material equalization effect and take into account the material discharge speed, material equalization plate three 2231 is installed at an angle downward, that is, material equalization plate three 2231 is tilted to the right.

[0046] like Figure 5 As shown, in one embodiment, under normal operating conditions, the right end of the material distribution plate 3 2231 is lower than the left end of the material distribution plate 3 2231, and the angle between the material distribution plate 3 2231 and the horizontal plane is less than 90 degrees. The material discharge channel formed by the side of the material distribution plate 3 2231 and the material distribution box 225 allows the material to flow in a predetermined direction. The structure of the material distribution plate 4 2232 is the same as that of the material distribution plate 3 2231, and the material distribution plate 4 2232 is also installed at an angle downwards, that is, the material distribution plate 4 2232 is inclined to the left.

[0047] like Figure 5 As shown, in one embodiment, under normal operating conditions of the rotary screen, the left end of the material distribution plate 2232 is lower than the right end of the material distribution plate 2232, and the angle between the material distribution plate 2232 and the horizontal plane is greater than 90 degrees.

[0048] Combination Figure 4 , Figure 5 and Figure 6 Downstream of the first material homogenizing component 223, a second material homogenizing component 224 is also installed, the second material homogenizing component 224 comprising a plurality of material homogenizing plates 2241.

[0049] In one embodiment, there are seven equalizing plates 2241, which are constructed in a tower-like structure. Specifically, the upper ends of the seven equalizing plates 2241 converge downstream of the first equalizing component 223 and gradually disperse downwards. The seven equalizing plates 2241 and the housing constitute eight equalizing channels 2242, which gradually enlarge from top to bottom. All equalizing plates 2241 are within the extension range of the first equalizing component 223. This arrangement of the equalizing plates 2241 allows the material to be evenly spread along the arrangement direction of the equalizing plates 2241, and then, when the material is conveyed to the upper screen vessel 310 or the lower screen vessel 320, it can be spread relatively evenly in the width direction of the screen vessel. The tower-like structure ensures that the amount of material entering each equalizing channel 2242 is as equal as possible. The increased size of the lower end of the equalizing channel 2242 further disperses the material, enhancing the equalizing effect. Understandably, the number of material distribution plates 5241 is not limited to 7. Through the above methods, the material distribution device 200 of this embodiment can achieve material distribution without the need for a separate power mechanism.

[0050] like Figure 1 and Figure 4 As shown, the material distribution section 230 is located downstream of the material equalization section 220. The material distribution section 230 is located at the lowest end of the material distribution device 200. The material distribution section 230 is used to receive and transport the material transported by the material equalization section to different screen boats arranged vertically. The material distribution section is equipped with a material channel control mechanism to control the material entering different screen boats. That is, the material can be switched between three conveying states: the first conveying state is to transport the material to the upper screen boat; the second conveying state is to transport the material to the lower screen boat; and the third conveying state is to transport the material to both the upper and lower screen boats at the same time.

[0051] The material distribution section 230 includes a material distribution box 231, which, together with the material equalization box 225, forms a "U"-shaped structure. The material distribution box 231 is equipped with a material channel control mechanism, including a material distribution plate 232 and a rotary guide assembly 233.

[0052] The rotating material guide assembly 233 and the material distribution plate 232 are spaced apart; a material distribution port is formed between the rotating material guide assembly 233 and the material distribution plate 232, and the material distribution port includes a first material distribution port 240 and a second material distribution port 250 spaced apart. The rotating material guide assembly 233 includes a first material guide plate 2331 and a second material guide plate 2332. The second material guide plate 2332 is disposed on the rotating assembly 260, and the second material guide plate 2332 is located above the first material guide plate 2331. The rotating assembly 260 is in contact with the first material guide plate 2331.

[0053] The rotating guide assembly 233 and the distribution plate 232 of the material distribution section 230 work together to allow materials to enter different screen boats. By adjusting the state of the rotating guide assembly 233 and cooperating with the distribution plate 232, materials can enter different screen bodies. Specifically, under the action of the rotating assembly, the second guide plate rotates and comes into contact with the distribution plate on the corresponding second distribution port, closing the second distribution port, and the material enters the lower screen boat through the first distribution port; the second guide plate rotates in the opposite direction and comes into contact with the distribution plate on the corresponding first distribution port, closing the first distribution port, and the material enters the upper screen boat through the second distribution port.

[0054] like Figure 7 As shown, the material distribution device 200 is divided into multiple first material distribution ports 240 and second material distribution ports 250 by a plurality of rotating material guiding components 233 and a plurality of material distribution plates 232. The rotating material guiding components 233 can rotate left and right. Specifically, the rotating material guiding components 233 include a first material guiding plate 2331, a second material guiding plate 2332, and a rotating component 260. The second material guiding plate 2332 is mounted on the rotating component 260 and is located above the first material guiding plate 2331. The rotating component 260 is in contact with the first material guiding plate 2332.

[0055] Under the action of the rotating component 260, the guide plate 2332 rotates and comes into contact with the corresponding distribution plate on the second distribution port, closing the second distribution port, and the material enters the lower screen ship through the first distribution port; the guide plate 2332 rotates in the opposite direction and comes into contact with the corresponding distribution plate on the first distribution port, closing the first distribution port, and the material enters the upper screen ship through the second distribution port.

[0056] When the rotary guide assembly 233 is placed Figure 7In the indicated position, the discharge directions of adjacent first and second distribution ports 240 and 250 are different. Taking the two adjacent distribution ports on the left as an example, the discharge direction of the second distribution port 250 is inclined upward relative to the discharge direction of the first distribution port 240. The discharge direction of the second distribution port 250 leads to the upper screen vessel 310, while the discharge direction of the first distribution port 240 leads to the lower screen vessel 320. The number of first and second distribution ports 240 and 250 is the same, which ensures that the amount of material entering different screen vessels is equal. In this embodiment, the discharge directions of adjacent first and second distribution ports 240 and 250 are different, thus leading to different screen vessels. This is suitable for the material uniformity requirements of rotary screens with multiple layers of screen vessels and screen surfaces with the same aperture size in the screen vessels. Such rotary screens can increase production capacity several times over without changing the floor space.

[0057] Specifically, when the rotating guide assembly 233 is placed Figure 8 When the material is positioned as shown, the second feeding port 250 is covered by the rotary guide assembly 233. At this time, the rotary guide assembly 233 and the feeding plate 232 are arranged at an obtuse angle, that is, the right end of the rotary guide assembly 233 is lower than the left end. The material cannot pass through the second feeding port 250 into its corresponding screen boat. When the material falls above the second feeding port 250, it is guided into the first feeding port 240 by the rotary guide assembly 233 and thus into its corresponding screen boat. When the rotary guide assembly 233 is placed... Figure 9 When the material is positioned as shown, the first feeding port 240 is covered by the rotating material guide assembly 233. At this time, the rotating material guide assembly 233 and the feeding plate 232 are arranged at an obtuse angle, meaning the right end of the rotating material guide assembly 233 is higher than the left end. Material cannot pass through the first feeding port 240 into its corresponding screening boat. When material falls above the first feeding port 240, it is guided by the rotating material guide assembly 233 to the second feeding port 250, thus entering its corresponding screening boat. In this embodiment, when the rotating material guide assembly 233 is placed... Figure 8 When the position shown is reached, the material enters the lower screen vessel only through the first feed port 240. When the rotating guide assembly 233 is placed... Figure 9 At the indicated position, material enters the lower screen vessel only through the second feed port 250. This type of rotary screen is suitable for applications requiring uniform material distribution in rotary screens with multiple screen vessels and screens with different aperture sizes. It can achieve screening of various materials without changing screens.

[0058] In one embodiment, to achieve automated control of the position of the rotating guide assembly 233, such as... Figure 10 As shown, the material distribution device 200 is equipped with a rotating component 260. For example... Figure 11 As shown, the rotating assembly 260 includes a driving rotating shaft 261, several driven rotating shafts 262, a connecting rod assembly, and a power element 266.

[0059] The active rotating shaft 261 is rotatably mounted on the material distribution box 231. Specifically, to ensure the reliability of the rotating assembly 260, a seated bearing 265 is installed on the material distribution device 200, and the seated bearing 265 is fixed to the right side of the material distribution device 200 by bolts. The active rotating shaft 261 is mounted on the seated bearing 265. A corresponding guide plate 2332 is provided on the active rotating shaft 261.

[0060] The linkage assembly includes a first linkage 263 and a second linkage 264. Several second linkages 264 are spaced apart along the length of the first linkage 263. One end of the second linkage 264 is rotatably connected to the first linkage 263, and the other end of the second linkage 264 is connected to the corresponding driven rotating shaft 262 or driving rotating shaft 261. Specifically, the second linkage 264 and the driving rotating shaft 261 (driven rotating shaft 262) are fixedly connected by nuts.

[0061] The driven rotating shaft 262 is rotatably mounted on the material distribution box 231. The driven rotating shaft 262 is mounted on a corresponding seated bearing 265. The driven rotating shaft 262 is connected to the driving rotating shaft 261 via a connecting rod assembly. A corresponding guide plate 2232 is provided on the driven rotating shaft 262.

[0062] To prevent relative rotation between the second link 264 and the driving rotation shaft 261 (driven rotation shaft 262), an anti-rotation component is provided on one end of the driving or driven rotation shaft and the corresponding second link. This component includes a polygonal boss on the shaft head of the driving or driven rotation shaft. The anti-rotation component also includes a polygonal connecting hole at the connecting end of the second link, which mates with the polygonal boss. Specifically, a square boss 2612 is provided on the driving rotation shaft 261 (driven rotation shaft 262), and a square hole 2641 is provided on the second link 264. The combination of these two components prevents relative rotation between the second link 264 and the driving rotation shaft 261 (driven rotation shaft 262).

[0063] To improve the reliability of the welding between the guide plate 2332 of the rotary guide assembly 233 and the active rotary shaft 261, such as... Figure 13 As shown, the active rotating shaft 261 is provided with a mounting surface 2611 that mates with the guide plate 2332 of the rotating guide assembly 233. Figure 16 As shown, the driven rotating shaft 262 is provided with a mounting plane 2621 that cooperates with the guide plate 2332 of the rotating guide assembly 233.

[0064] A rotating assembly is provided between the second connecting rod 264 and the first connecting rod 263, including a circular hole 2642 at the end of the second connecting rod 264 and circular holes spaced apart on the first connecting rod 263. A pin is disposed in the circular hole 2642 of the second connecting rod and the corresponding circular hole of the first connecting rod, and is locked in place by a cotter pin. Specifically, as shown... Figure 14 As shown, to ensure the movable connection between the second link 264 and the first link 263, a circular hole 2642 is provided on the second link 264, and the two are movably connected by a pin and a cotter pin.

[0065] like Figure 12 As shown, the rotating assembly 260 also includes a mounting bracket 267 and a coupling 268. (As...) Figure 15 As shown, the mounting bracket 267 includes a first mounting base 2671 and a second mounting base 2672. The first mounting base 2671 is fixedly connected to the material distribution device 200 by bolts; the second mounting base 2672 is fixedly connected to the power element 266 by bolts. The power element 266 is mounted on the material distribution box 231 via the mounting bracket. The power element 266 drives the active rotating shaft 261. Specifically, the output shaft of the power element is connected to the active rotating shaft 261 via a coupling 268.

[0066] When the power element is activated, it drives the active rotating shaft to rotate, which in turn drives the second guide plate on it to rotate. Under the drive of the connecting rod assembly, the driven rotating shaft rotates synchronously, which allows the second guide plate to be in different positions, thereby controlling the material to enter different screen boats.

[0067] like Figure 16 As shown, the structure of the driven rotating shaft 262 is similar to that of the driving rotating shaft 261. The connection method between the driven rotating shaft 262 and the second connecting rod 264 is similar to that between the driving rotating shaft 261 and the second connecting rod 264, and will not be described in detail here.

[0068] In one embodiment, the power element 266 drives the active rotating shaft 261 to rotate, which in turn drives the rotating material guide assembly 233 to rotate. Under the influence of the first connecting rod 263 and the second connecting rod 264, the driven rotating shaft 262 rotates synchronously, allowing the rotating material guide assembly 233 to be in different positions. Figure 7 , Figure 8 and Figure 9 The indicated positions allow for control of material entry into different screening vessels.

[0069] Example 2 like Figure 18 As shown, the rotary screen 10 includes a frame 100, a material distribution device 200, a screen body 300, a discharge collection device 400, a transmission device 500, a suspension assembly 700, a dynamic monitoring device 800, and a rotating door 600.

[0070] The screen body 300 includes an upper screen vessel 310 and a lower screen vessel 320. The upper screen vessel 310 and the lower screen vessel 320 constitute the screen body and can swing together. The screen body 300 is suspended from the frame 100 by a suspension assembly 700. Figure 18 , Figure 22 and Figure 23As shown, the upper screening vessel 310 is located above the transmission device 500, and the lower screening vessel 320 is located below the transmission device 500. The upper screening vessel 310, the transmission device 500, and the lower screening vessel 320 are hoisted onto the frame 100 by the suspension assembly 700.

[0071] In one embodiment, such as Figure 22 , Figure 23 As shown, the suspension assembly 700 includes a suspension body 701 and a flexible suspension rod 702. The upper, middle, and lower parts of the suspension body 701 are connected to the upper screen vessel 310, the transmission device 500, and the lower screen vessel 320, respectively. One end of the flexible suspension rod 702 is connected to the suspension body 701, and the other end of the flexible suspension rod 702 is connected to the frame 100. When the screen body is in operation, the flexible suspension rod 702 can deform along with the screen body.

[0072] In one embodiment, the suspension assembly 700 further includes a safety wire rope 703, which is installed in the same way as the flexible rod 702. If the flexible rod 702 breaks abnormally during the operation of the screen body, the safety wire rope 703 can play a role in preventing the screen body from falling. Specifically, there are four suspension assemblies 700, which are respectively located at the four corners of the screen body 300, which facilitates the smooth rotation of the screen body.

[0073] like Figure 19 As shown, taking the upper screening vessel 310 as an example, the upper screening vessel 310 is provided with a layer of screen 311. In one embodiment, as... Figure 19 As shown, to facilitate the conveying of the screened finished material and impurities into the corresponding material channels of the discharge collection device 400, the screen 311 is inclined downwards relative to the horizontal direction from the front end to the rear end, i.e., in the left-right direction. In this document, unless otherwise specified, the horizontal direction is used as a reference when referring to inclination or the direction of inclination. Specifically, the right end of the screen 311 is inclined downwards, so that in the vertical direction, the right end of the screen 311 is lower than the left end. The upper screen boat 310 and the lower screen boat 320 are each inclined downwards, and the screen body formed by the two is inclined downwards. When the screen body rotates, the screened finished material and impurities are conveyed into the corresponding material channels under the action of gravity, thereby improving the overall efficiency of the machine.

[0074] The lower screening vessel 320 and the upper screening vessel 310 have the same structure, each equipped with a layer of screen. The upper and lower screening vessels can be configured with screens of the same or different aperture sizes. This invention, a combined rotary screen, is a device for multi-stage screening of materials (such as feed, grain, etc.). It includes a screen body comprising multiple vertically arranged screening vessels, increasing the screening area without increasing the floor space. Different aperture sizes can be configured inside the multiple screening vessels. Combined with a material channel control device, it can achieve screening of two or more materials with different particle sizes without the need for screen replacement.

[0075] In one embodiment, to prevent screen clogging, a screen cleaning assembly 312 is provided on the upper screening vessel 310, including a plurality of elastic cleaning balls 3122 and a cleaning ball bracket 3121; the screen 311 is disposed above the cleaning ball bracket 3121, and the elastic cleaning balls 3122 are evenly distributed in a plurality of partition frames of the cleaning ball bracket 3121. The cleaning balls 3122 are used to clean the material stuck on the screen 311 during the screening process, to prevent the screen 311 from clogging and to ensure the screening performance of the equipment. The cleaning ball bracket 3121 provides support for the screen 311 and the cleaning balls 3122.

[0076] The upper screening vessel 310 forms a first screening zone above the screen 311, and the cleaning ball bracket 3121 forms a second screening zone.

[0077] The discharge collection device 400 is located at the rear end of the screen body 300. Specifically, the discharge collection device 400 is connected to the tail end of the screen body and is used for the collection and recovery of finished products and impurities after screening. Each screening zone is connected to a different material channel of the discharge collection device 400. In this embodiment, the first screening zone and the second screening zone are respectively configured as the finished product screening collection zone 401 and the small impurity screening collection zone 402. More specifically, taking the screening of poultry feed as an example, the finished feed remains in the finished product screening collection zone 401, and impurities with a particle size smaller than the finished feed are defined as small impurities and can enter the small impurity screening collection zone 402. The screen setting method in the lower screening vessel 320 is the same as that in the upper screening vessel 310, and will not be described again. A connecting channel 403 is provided between the finished product screening collection zones 401 of the upper and lower screening vessels; a connecting channel 404 is provided between the small impurity screening zones of the upper and lower screening vessels.

[0078] The material distribution device 200 is located at the front end of the screen body 300. Specifically, for example... Figure 18 As shown, the material distribution device 200 is installed at the upper left end of the upper screening vessel. The material distribution device can evenly feed materials into the multi-layer screening vessel. The material distribution device is also equipped with a material channel control device, which can control the material to enter a specific layer of the multi-layer screening vessel.

[0079] A rotating door 600 is located at the front end of the screen body, and includes an upper rotating door 610 and a lower rotating door 620. The upper rotating door 610 is used to shield the screens 311 installed in the upper screen vessel 310 and the lower screen vessel 320. A material guiding channel is provided in the upper rotating door 610 to evenly guide the material into the upper screen vessel 310. The lower rotating door 620 is used to shield the screens 311 installed in the lower screen vessel 320. A material guiding channel is provided in the lower rotating door to evenly guide the material into the lower screen vessel 320.

[0080] like Figure 18As shown, the transmission device 500 is used to drive the screen body to rotate. In this embodiment, the transmission device 500 drives the screen body (upper screen boat 310 and lower screen boat 320) to rotate. The transmission device 500 is powered by an external drive unit 501, and then the transmission device 500 drives the upper screen boat 310 and lower screen boat 320 to rotate, thereby screening the material.

[0081] The dynamic monitoring device 800 is used to detect the movement of the screen body. When abnormal operation occurs, it can control the transmission device 500 to stop, improving the overall safety performance of the machine. Specifically, such as... Figure 21 As shown, the dynamic monitoring device 800 includes a limit switch 801, a switch mounting bracket 802, and a contact ring 803. The switch mounting bracket 802 is mounted on one side of the frame 100, the limit switch 801 is mounted on the switch mounting bracket 802, and the contact ring 803 is mounted on one side of the upper screen vessel 310, rotating with the screen body. A spring probe 804 is installed on the limit switch 801. When the screen body operates abnormally, the contact ring 803 will touch the spring probe 804, at which point the limit switch 801 will activate, disconnecting the power supply to the drive unit 501 and stopping the combined rotary screen. This device greatly improves the safety performance of the combined rotary screen.

[0082] like Figure 17 As shown, this material distribution device is equipped with 4 sets of screen boats, which can also control the material to enter different screen boats for screening. This example can achieve screening of 4 different particle sizes of materials without changing the screen surface.

[0083] This invention relates to a rotary grading screen, which includes a material equalization mechanism and a material distribution mechanism. The rotary screen comprises an upper screen vessel and a lower screen vessel, each having a finished product screening and collection area and a small impurity screening and collection area arranged from top to bottom. Each finished product screening and collection area is connected to several connecting channels. The cooperation between the material equalization mechanism and the material distribution mechanism allows the material to be evenly spread in the direction of the material equalization plate and then relatively evenly spread in the width direction of the screen vessel. At the same time, it can also control the material to enter different screen vessels, enabling the same equipment to screen different materials and achieve multi-purpose functionality.

Claims

1. A material dispensing device, characterized in that it comprises: Feeding section, wherein a feeding channel is provided; The material equalization section is located downstream of the feeding section and is used to receive and evenly distribute the material conveyed by the feeding channel. The material homogenization section includes: equalization box; A material distribution assembly is disposed within the material distribution box, the material distribution assembly comprising: The first material equalization assembly includes material equalization plate three and material equalization plate four, with material equalization plate four located downstream of material equalization plate three; material equalization plate three and material equalization plate four are arranged opposite to each other and overlapping, and are inclined downward. The second material equalization component is located downstream of the first material equalization component. The second material equalization component includes several spaced material equalization plates five. The middle material equalization plate five is vertically arranged, and the upper parts of the two side material equalization plates five are inclined and close to the middle material equalization plate. A material equalization channel is formed between the material equalization plates five, and the material equalization channel gradually increases in size along the feeding direction. The material distribution section is located downstream of the material equalization section. The material distribution section is used to receive and transport the material transported by the material equalization section to different screen boats arranged vertically. The material distribution section is equipped with a material channel control mechanism to control the material entering different screen boats. That is, the material can be switched between three conveying states: the first conveying state is to convey the material to the upper screen boat; the second conveying state is to convey the material to the lower screen boat; and the third conveying state is to convey the material to both the upper and lower screen boats simultaneously. The material channel control mechanism includes: Material sorting plate; A rotary material guiding assembly is spaced apart from the material distributing plate; a material distributing port is formed between the rotary material guiding assembly and the material distributing plate, the material distributing port including a first material distributing port and a second material distributing port spaced apart, the rotary material guiding assembly comprising: Guide plate 1; A second guide plate is disposed on the rotating assembly, the second guide plate being located above the first guide plate, and the rotating assembly being in contact with the first guide plate; Under the action of the rotating component, the second guide plate rotates and comes into contact with the corresponding second distribution port, closing the second distribution port, and the material enters the lower screen ship through the first distribution port; the second guide plate rotates in the opposite direction and comes into contact with the corresponding first distribution port, closing the first distribution port, and the material enters the upper screen ship through the second distribution port. The rotating assembly includes: An active rotating shaft is rotatably mounted on the material distribution box; a corresponding guide plate is provided on the active rotating shaft. A driven rotating shaft is rotatably mounted on the material distribution box; the driven rotating shaft is connected to the driving rotating shaft via a connecting rod assembly; a corresponding guide plate is provided on the driven rotating shaft; The linkage assembly includes a first linkage and a second linkage. A plurality of second linkages are spaced apart along the length of the first linkage. One end of the second linkage is rotatably connected to the first linkage, and the other end of the second linkage is connected to the corresponding driven rotation shaft or the driving rotation shaft. A power element is installed on the material distribution box, and the power element drives and connects to the active rotating shaft; When the power element is activated, it drives the active rotating shaft to rotate, which in turn drives the second guide plate on it to rotate. Under the drive of the connecting rod assembly, the driven rotating shaft rotates synchronously, which allows the second guide plate to be in different positions, thereby controlling the material to enter different screen boats.

2. The material dispensing device according to claim 1, characterized in that, The material distributing section comprises a material distributing box body, and the material distributing box body and the material homogenizing box body form a "convex"-shaped structure.

3. The material dispensing device according to claim 1, characterized in that, An anti-rotation assembly is arranged at one end of the driving rotating shaft or the driven rotating shaft and the corresponding second connecting rod, comprising: A polygonal boss arranged on the shaft head of the driving rotating shaft or the driven rotating shaft; A polygonal connecting hole arranged at the connecting end of the second connecting rod, wherein the polygonal connecting hole is matched with the polygonal boss; A rotating assembly is arranged between the second connecting rod and the first connecting rod, comprising: A round hole arranged at the other end of the second connecting rod; Round holes are arranged on the first connecting rod at intervals, A pin shaft, which is arranged in the round hole of the second connecting rod and the corresponding round hole of the first connecting rod and is locked by a split pin.

4. A rotary screen, characterized in that, Comprising: A frame; A sieve body, wherein the sieve body comprises several layers of sieve boats arranged from top to bottom; The material distributing device according to any one of claims 1 to 3, which is arranged at the feeding end of the sieve body and used for uniformly conveying materials to the sieve boats of different layers; A material discharging and collecting device, which is arranged at the discharging end of the sieve body and used for collecting and recovering finished products and impurities after sieving by the sieve boats; A transmission device, which is drivingly connected to the sieve body, and the transmission device is used for driving the sieve body to perform rotary motion.

5. The rotary screen according to claim 4, characterized in that, A sieve mesh is arranged on the sieve boat, and a first sieving zone is formed above the sieve mesh; the discharging end of the sieve mesh is arranged to be inclined downward relative to the feeding end of the sieve mesh; The sieve meshes of the sieve boats adjacent up and down have the same or different pore sizes.

6. The rotary screen according to claim 4, characterized in that, A sieve mesh cleaning assembly is arranged on the sieve boat and used for cleaning materials stuck on the sieve mesh during the sieving process; the sieve mesh cleaning assembly comprises: A bracket for supporting the sieve mesh; a second sieving zone is formed below the bracket; An elastic cleaning ball, which is arranged in the bracket and located below the sieve mesh.

7. The rotary screen according to claim 6, characterized in that, A separation frame is arranged on the bracket, and is used for uniformly distributing the elastic cleaning balls in the bracket.

8. The rotary screen according to claim 4, characterized in that, The rotary sieve comprises a dynamic monitoring device, which is used for detecting the movement condition of the sieve body and controlling the transmission device to stop when the sieve body operates abnormally; The dynamic monitoring device comprises: A contact ring, which is arranged on the sieve body and performs rotary motion along with the sieve body; A travel switch assembly, which is arranged on the frame; when the travel switch assembly touches the contact ring, it indicates that the sieve body operates abnormally.

9. The rotary screen according to claim 8, characterized in that, The travel switch assembly comprises: A mounting bracket, which is arranged on the frame; A travel switch, which is arranged on the mounting bracket; A spring probe, which is arranged on the travel switch; when the spring probe touches the contact ring, it indicates that the sieve body operates abnormally.

10. The rotary screen according to claim 4, characterized in that, The sieve body is hoisted on the frame through suspension assemblies, the suspension assemblies are arranged at four corners of the sieve body, and each suspension assembly comprises: A suspension body, wherein the upper part, the middle part and the lower part of the suspension body are respectively connected with the upper sieve boat, the transmission device and the lower sieve boat; A flexible suspender, one end of the flexible suspender is connected with the frame, and the other end of the flexible suspender is connected with the suspension body; the flexible suspender can deform along with the operation of the sieve body.

11. The rotary screen according to claim 10, characterized in that, The suspension assembly further comprises a safety protection rope, which is used for preventing the sieve body from falling when the flexible suspender breaks during the operation of the sieve body; One end of the safety rope is connected to the frame, and the other end of the safety rope is connected to the suspension body.

12. The rotary screen according to claim 6, characterized in that, The discharge collection device includes: The finished product screening and collection area is used to collect the finished product material from the first screening section; a connecting channel is set between the finished product screening and collection areas of adjacent screening vessels; The small impurity screening and collection area is located below the finished product screening and collection area, and a connecting channel is provided between the small impurity screening sections of adjacent screening boats; the small impurity screening and collection area is used to collect small impurities from the second screening section. When the screen body rotates, the screened finished materials and impurities are transported to the corresponding finished product screening and collection area and the small impurity screening and collection area under the action of gravity.

13. The rotary screen according to claim 4, characterized in that, The feed end of the screen boat is equipped with a rotating door to cover the screen mesh, and the rotating door is equipped with a material guiding channel to evenly guide the material into different screen boats arranged vertically.

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