Vibrating screening system

Abstract

The invention provides a vibrating screening system. The vibrating screening system comprises a screening room; the first screening assembly is arranged in the screening room, the first screening assembly comprises a first fixing frame, a first vibrating screen and a first screening discharging bin, a first screening platform is arranged on the first fixing frame, the first vibrating screen is movably arranged on the first screening platform, and the first screening discharging bin is arranged on the first screening platform. The first screening bin is arranged on the first fixing frame, located below the first screening platform and used for storing materials screened by the first vibrating screen; the outer edge of the first walking wheel on the first guide rail can make contact with the first screening platform, the outer edge of the third walking wheel on the second guide rail can make contact with the second screening platform, the length of the first guide rail and the length of the second guide rail can be shortened, and the flat area of the first screening platform and the flat area of the second screening platform are larger.

Description

Technical Field

[0001] This application belongs to the field of screening technology, specifically relating to a vibrating screening system. Background Technology

[0002] In the iron and steel metallurgy industry, material classification and screening are indispensable key links in the entire process from raw material storage and transportation, ore sintering to ironmaking and steelmaking. As a core screening equipment, the vibrating screen typically has at least two discharge channels: an oversize discharge port and an undersize discharge port. The oversize material is mostly the core raw material required for the main production process, so its conveying path is usually prioritized in the process layout. However, due to its fine particle size and poor flowability, the undersize material presents many challenges to the system layout, whether it is stored in a silo or transferred via a belt conveyor. If the connection design between the vibrating screen and subsequent equipment is unreasonable, it can easily lead to material blockage, conveying interruptions, and other production problems, resulting in serious economic losses. The following problems exist: 1. For unfavorable operating conditions of the belt conveyor connected to the vibrating screen, see [link to relevant documentation]. Figure 1 During the descent of powdery, wet, sticky materials, due to the limited angle of the chute, they gradually accumulate in the middle of the chute, eventually clogging the chute and forcing the production system to stop for maintenance and clearing of the blockage.

[0003] 2. For unfavorable operating conditions occurring in the lower receiving hopper of the vibrating screen, see [link to relevant documentation]. Figure 2 The undersize material discharge chute is located at the end of the silo. During the material discharge process, the material is severely misaligned within the silo, resulting in low silo utilization. If the belt conveyor under the silo stops due to an accident, the amount of material available for discharge from the silo is limited, causing serious waiting time for loading. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0005] To address the aforementioned problems, this application provides a vibrating screening system, comprising: Screening room; The first screening component is disposed in the screening chamber. The first screening component includes a first fixed frame, a first vibrating screen and a first undersize hopper. A first screening platform is disposed on the first fixed frame. The first vibrating screen is movably disposed on the first screening platform. The first undersize hopper is disposed on the first fixed frame and located below the first screening platform for storing the material undersize from the first vibrating screen. The system also includes a first scraper conveyor, which is set on the first screening platform and located between the first vibrating screen and the first undersize hopper. The feed inlet of the first scraper conveyor is connected to the undersize discharge outlet of the first vibrating screen. The first scraper conveyor is set along the length of the opening of the first undersize hopper, and an elongated discharge port covering the length of the opening of the first undersize hopper is provided below it.

[0006] Optionally, the first vibrating screen is symmetrically provided with a first traveling wheel at its first end, and a second traveling wheel is symmetrically provided at its second end. A first guide rail is symmetrically provided on the first screening platform. The first traveling wheel and the second traveling wheel are rotatably mounted on the first guide rail. The radius of the first traveling wheel is greater than the radius of the second traveling wheel, and the radius of the first traveling wheel is greater than the height of the first guide rail, so that after the first traveling wheel is disengaged from the first guide rail, its outer edge can directly contact the first screening platform.

[0007] Optionally, a first flexible connection is provided between the undersize discharge port of the first vibrating screen and the feed port of the first scraper conveyor.

[0008] Optionally, a second screening assembly is also included. The second screening assembly is disposed within the screening chamber. The second screening assembly includes a second fixed frame, a second vibrating screen, and a belt conveyor. A second screening platform and a conveying platform are disposed within the second fixed frame. The second vibrating screen is movably disposed on the second screening platform. The belt conveyor is disposed on the conveying platform. A second scraper conveyor is disposed between the second vibrating screen and the belt conveyor.

[0009] Optionally, the feed inlet of the second scraper conveyor is connected to the under-screen discharge outlet of the second vibrating screen. The bottom of the second scraper conveyor is provided with a first discharge pipe and a second discharge pipe. The first discharge pipe is connected to the feed inlet of the belt conveyor, and the second discharge pipe is connected to a bypass chute.

[0010] Optionally, the first discharge pipe and the second discharge pipe are vertically arranged at the bottom of the second scraper conveyor.

[0011] Optionally, both the first discharge pipe and the second discharge pipe are equipped with electric valves.

[0012] Optionally, a third traveling wheel is symmetrically arranged at the first end of the second vibrating screen, a fourth traveling wheel is symmetrically arranged at the second end of the second vibrating screen, and a second guide rail is symmetrically arranged on the second screening platform. The third traveling wheel and the fourth traveling wheel are rotatably mounted on the second guide rail. The radius of the third traveling wheel is greater than the radius of the fourth traveling wheel, and the radius of the third traveling wheel is greater than the height of the second guide rail, so that after the third traveling wheel is disengaged from the second guide rail, its outer edge can directly contact the second screening platform.

[0013] Optionally, a second flexible connection is provided between the undersize discharge port of the second vibrating screen and the feed port of the second scraper conveyor.

[0014] Optionally, the second flexible connection is an electromagnetically actuated rubber flexible connection.

[0015] Beneficial effects The vibrating screening system provided in the embodiments of the present invention, through the setting of a first scraper conveyor, increases the material accumulation range of the first vibrating screen, increases the filling rate of the first undersize hopper, and increases the effective volume of the first undersize hopper. Through the setting of a second scraper conveyor, the existing inclined material discharge of the chute is changed to vertical material discharge, improving the material discharge efficiency. Through the automatic opening and closing switching of the first discharge pipe and the second discharge pipe by an electric valve, when the belt conveyor fails and stops, the material can be vertically introduced into the bypass chute for emergency discharge through the second discharge pipe, avoiding the accumulation of material and causing the entire screening system to stop, thus greatly improving the continuity of production. By setting the outer edge of the first traveling wheel on the first guide rail to contact the first screening platform and the outer edge of the third traveling wheel on the second guide rail to contact the second screening platform, the length of the first guide rail and the second guide rail can be shortened, making the flat area of ​​the first screening platform and the second screening platform larger, facilitating the walking and working of workers, reducing the probability of workers tripping during work, and improving safety. Attached Figure Description

[0016] Figure 1 This is a diagram of an uneven material distribution structure in existing technologies. Figure 2 Diagram of a blockage chute structure in existing technology; Figure 3 This is a structural diagram of the first screening component of the present invention; Figure 4 This is a connection structure diagram of the first scraper conveyor of the present invention; Figure 5 This is a structural diagram of the maintenance status of the second screening component of the present invention; Figure 6 This is a side view of the second vibrating screen of the present invention; Figure 7 This is a structural diagram showing the connection between the third traveling wheel and the second guide rail of the present invention; Figure 8 This is a structural diagram of the second screening component of the present invention in its working state.

[0017] The reference numerals in the attached figures are as follows: 10. First screening assembly; 101. First fixed frame; 102. First vibrating screen; 103. First screened material bin; 104. First screening platform; 105. First scraper conveyor; 106. First traveling wheel; 107. Second traveling wheel; 108. First guide rail; 109. First flexible connection; 20. Second screening assembly; 201. Second fixed frame; 202. Second vibrating screen; 203. Belt conveyor; 204. Second screening platform; 205. Conveying platform; 206. Second scraper conveyor; 207. First discharge pipe; 208. Second discharge pipe; 209. Electric valve; 210. Third traveling wheel; 211. Fourth traveling wheel; 212. Second guide rail; 30. Accumulated material. Detailed Implementation

[0018] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0019] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0020] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0021] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0022] See also Figure 3-8 As shown, according to an embodiment of this application, a vibrating screening system includes: Screening room; A first screening component 10 is disposed within the screening chamber. The first screening component 10 includes a first fixed frame 101, a first vibrating screen 102, and a first undersize hopper 103. A first screening platform 104 is disposed on the first fixed frame 101. The first vibrating screen 102 is movably disposed on the first screening platform 104. The first undersize hopper 103 is disposed on the first fixed frame 101 and located below the first screening platform 104, and is used to store the undersize material of the first vibrating screen 102. The system also includes a first scraper conveyor 105, which is disposed on the first screening platform 104 and located between the first vibrating screen 102 and the first undersize hopper 103. The feed inlet of the first scraper conveyor 105 is connected to the undersize discharge outlet of the first vibrating screen 102. The first scraper conveyor 105 is arranged along the length of the opening of the first undersize hopper 103, and an elongated discharge port covering the length of the opening of the first undersize hopper 103 is provided below it.

[0023] In this technical solution, the vibrating screening system provided in this application embodiment includes a screening chamber and a first screening component 10. The first screening component 10 comprises a first fixed frame 101, a first vibrating screen 102, a first undersize hopper 103, and a first scraper conveyor 105. The first vibrating screen 102 is installed on a first screening platform 104, and the first undersize hopper 103 is located below the first screening platform 104 for storing the material undersize from the first vibrating screen 102. By installing the first scraper conveyor 105 between the first vibrating screen 102 and the first undersize hopper 103... Between 03, its inlet is connected to the undersize outlet of the first vibrating screen 102. The first scraper conveyor 105 is arranged along the length of the opening of the first undersize silo 103, and an elongated discharge port covering the length of the opening is provided below it. It can scrape the undersize material fed into the first vibrating screen 102 into the first scraper conveyor 105 and send it into the first undersize silo 103. The first scraper conveyor 105 can drive the discharge of material along the length of the first undersize silo 103, which improves the material filling rate of the first undersize silo 103 and increases the effective volume of the first undersize silo 103.

[0024] In processes such as steel metallurgy where material grading and screening are required, after the first vibrating screen 102 completes material screening, the undersized material can enter the first scraper conveyor 105 through the undersized material outlet. Through the arrangement of the first scraper conveyor 105 along the length of the first undersized material bin 103 and its elongated discharge port, the material can be evenly conveyed to the entire opening area of ​​the first undersized material bin 103. During the conveying process, when the discharge point in the first undersized material bin 103 rises to the bottom of the first scraper conveyor 105, because the bottom of the first scraper conveyor 105 has an open structure, it can continuously scrape the material to one side, avoiding problems such as uneven material accumulation and wasted space caused by traditional single-point discharge. This significantly improves the material filling rate and effective volume of the first undersized material bin 103. Simultaneously, the first vibrating screen 102 can be movably mounted on the first screening platform 104, facilitating subsequent equipment inspection and maintenance, reducing downtime, and ensuring production continuity.

[0025] It is understandable that the first scraper conveyor 105 is embedded in the opening of the first screening bin 103, and its two sides are welded and fixed to the opening of the first screening bin 103. The gap between the first scraper conveyor 105 and the first screening platform 104 is sealed by welding steel plates.

[0026] In some examples, the first scraper conveyor 105 may adopt a chain scraper conveying structure, and the housing of the first scraper conveyor 105 may adopt a sealed structure. Its inlet is sealed to the under-screen outlet of the first vibrating screen 102, which can effectively prevent dust from spilling out during material conveying and improve the working environment.

[0027] In some feasible embodiments, the first vibrating screen 102 is symmetrically provided with a first traveling wheel 106 at its first end, and a second traveling wheel 107 is symmetrically provided at its second end. A first guide rail 108 is symmetrically provided on the first screening platform 104. The first traveling wheel 106 and the second traveling wheel 107 are rotatably mounted on the first guide rail 108. The radius of the first traveling wheel 106 is greater than the radius of the second traveling wheel 107, and the radius of the first traveling wheel 106 is greater than the height of the first guide rail 108, so that after the first traveling wheel 106 is separated from the first guide rail 108, its outer edge can directly contact the first screening platform 104.

[0028] In this technical solution, since it is necessary to periodically move the vibrating screen to a location with hoisting equipment for maintenance of the motor or replacement and repair of the screen plate, the existing mobile vibrating screens generally use wheelsets to travel on the guide rails of the screening platform. In order to move the vibrating screen, long guide rails need to be laid on the screening platform. However, long guide rails are not conducive to the passage of personnel and equipment on the screening platform during normal use. For blast furnace ore bins with dozens of vibrating screens, there is a set of vibrating screen guide rails every few meters on the screening platform, which causes more inconvenience to daily work. This application limits the radius of the first traveling wheel 106 on the first vibrating screen 102 to be greater than the radius of the second traveling wheel 107, and at the same time, the radius of the first traveling wheel 106 is greater than the height of the first guide rail 108, so as to ensure that the outer edge of the first traveling wheel 106 can directly contact the first screening platform 104 after it is separated from the first guide rail 108. Therefore, when the first vibrating screen 102 needs maintenance, it can be pushed to disengage the first traveling wheel 106 from the first guide rail 108. At this point, the first traveling wheel 106 directly contacts and rolls with the first screening platform 104, eliminating the need for additional extended first guide rails 108. This allows the first vibrating screen 102 to be moved to the maintenance area for subsequent maintenance using hoisting equipment. This design shortens the length of the first guide rail 108 on the first screening platform 104, resulting in a larger flat area for the platform, facilitating movement and work on it, reducing the likelihood of tripping, and improving safety.

[0029] Understandably, both the first traveling wheel 106 and the second traveling wheel 107 have inwardly oriented grooves on their outer circumferences. The first guide rail 108 is located within these grooves, guiding the movement of the first traveling wheel 106 and the second traveling wheel 107. The large radius of the first traveling wheel 106 ensures that it can move along the first guide rail 108 while also moving stably on the first screening platform 104 after leaving the first guide rail 108. In other words, the grooves on the first traveling wheel 106... The height is the same as that of the first guide rail 108, so that when the first traveling wheel 106 is on the first guide rail 108, the outer edge of the first traveling wheel 106 can contact the first screening platform 104, which facilitates subsequent movement. When the first traveling wheel 106 is separated from the first guide rail 108, the first traveling wheel 106 can still move on the first screening platform 104. Moreover, since the second traveling wheel 107 is still on the first guide rail 108 during this process, it can limit the movement direction of the first traveling wheel 106, so that the first vibrating screen 102 can be moved to the maintenance and hoisting position.

[0030] In some feasible embodiments, a first flexible connection 109 is provided between the under-screen discharge port of the first vibrating screen 102 and the feed port of the first scraper conveyor 105.

[0031] In this technical solution, by setting a first flexible connection 109 between the undersize discharge port of the first vibrating screen 102 and the feed port of the first scraper conveyor 105, the first flexible connection 109 can effectively absorb the vibration energy generated by the first vibrating screen 102 during the material screening and conveying process, avoiding the vibration from being directly transmitted to the first scraper conveyor 105, and preventing equipment resonance, component loosening or increased wear caused by rigid connection; at the same time, the first flexible connection 109 can seal the gap between the discharge port and the feed port, reducing the dust overflow of undersize material during the transfer process and improving the air quality at the work site.

[0032] Understandably, the first flexible connection 109 can be an electromagnetic attraction rubber flexible connection, which uses electromagnetic force to achieve a tight fit with the discharge port and the feed port, improving the sealing effect. At the same time, it facilitates quick disengagement and attraction when the first vibrating screen 102 moves, making the equipment easy to move.

[0033] In some feasible embodiments, a second screening assembly 20 is also included. The second screening assembly 20 is disposed within the screening chamber. The second screening assembly 20 includes a second fixed frame 201, a second vibrating screen 202, and a belt conveyor 203. A second screening platform 204 and a conveying platform 205 are disposed within the second fixed frame 201. The second vibrating screen 202 is movably disposed on the second screening platform 204. The belt conveyor 203 is disposed on the conveying platform 205. A second scraper conveyor 206 is disposed between the second vibrating screen 202 and the belt conveyor 203.

[0034] The feed inlet of the second scraper conveyor 206 is connected to the under-screen discharge outlet of the second vibrating screen 202. The bottom of the second scraper conveyor 206 is provided with a first discharge pipe 207 and a second discharge pipe 208. The first discharge pipe 207 is connected to the feed inlet of the belt conveyor 203, and the second discharge pipe 208 is connected to the bypass chute.

[0035] The first discharge pipe 207 and the second discharge pipe 208 are vertically arranged at the bottom of the second scraper conveyor 206.

[0036] In this technical solution, a second screening component 20 is also provided in the screening chamber. The material screened by the second screening component 20 enters the first screening component 10 for further screening. The second screening component 20 includes a second fixed frame 201, a second vibrating screen 202, a belt conveyor 203, and a second scraper conveyor 206. The second fixed frame 201 is arranged in layers with a second screening platform 204 and a conveying platform 205. The conveying platform 205 is located below the second screening platform 204. The material screened by the second vibrating screen 202 can be fed into the belt conveyor 203, which then transports the material into the first screening chamber. The material is fed into the first screening component 10 for further screening. It is then conveyed by a second scraper conveyor 206 between the second vibrating screen 202 and the belt conveyor 203. The second scraper conveyor 206 is vertically positioned at the bottom to define the first discharge pipe 207 and the second discharge pipe 208. Under normal operating conditions, after the material screened by the second vibrating screen 202 enters the second scraper conveyor 206, it falls vertically into the belt conveyor 203 through the first discharge pipe 207. Compared with the traditional inclined chute, vertical material discharge can reduce the clogging problem caused by powdery materials adhering to the pipe wall and improve the flow of materials.

[0037] Understandably, the first discharge pipe 207 and the second discharge pipe 208 form a 90° angle with the bottom of the second scraper conveyor 206 to ensure that the material falls vertically under the action of gravity, reducing the contact area with the pipe wall and further reducing the risk of adhesion and blockage.

[0038] In some feasible embodiments, electric valves 209 are provided on both the first discharge pipe 207 and the second discharge pipe 208.

[0039] In this technical solution, electric gates can be configured on the first discharge pipe 207 and the second discharge pipe 208 respectively. The discharge channel can be quickly switched by automatically controlling the opening and closing of the electric valve 209 without the need for manual on-site operation. When the belt conveyor 203 fails and stops, the material can be vertically introduced into the bypass chute through the second discharge pipe 208 for emergency discharge, avoiding material accumulation that could cause the entire screening system to stop, and greatly improving production continuity.

[0040] In some feasible embodiments, a third traveling wheel 210 is symmetrically arranged at the first end of the second vibrating screen 202, a fourth traveling wheel 211 is symmetrically arranged at the second end of the second vibrating screen 202, and a second guide rail 212 is symmetrically arranged on the second screening platform 204. The third traveling wheel 210 and the fourth traveling wheel 211 are rotatably mounted on the second guide rail 212. The radius of the third traveling wheel 210 is larger than the radius of the fourth traveling wheel 211, and the radius of the third traveling wheel 210 is larger than the height of the second guide rail 212, so that after the third traveling wheel 210 is separated from the second guide rail 212, its outer edge can directly contact the second screening platform 204.

[0041] In this technical solution, by limiting the radius of the third traveling wheel 210 on the second vibrating screen 202 to be greater than the radius of the fourth traveling wheel 211, and simultaneously ensuring that the radius of the third traveling wheel 210 is greater than the height of the second guide rail 212, it is guaranteed that the outer edge of the third traveling wheel 210 can directly contact the second screening platform 204 after it detaches from the second guide rail 212. Based on this, when maintenance of the second vibrating screen 202 is required, the second vibrating screen 202 can be pushed to disengage the third traveling wheel 210 from the second guide rail 212. At this time, the third traveling wheel 210 directly contacts and rolls with the second screening platform 204, eliminating the need for additional extensions of the second guide rail 212. This allows the second vibrating screen 202 to be moved to the maintenance area for subsequent maintenance using hoisting equipment. The above-mentioned arrangement can shorten the length of the second guide rail 212 on the second screening platform 204, making the flat area of ​​the second screening platform 204 larger, which makes it easier for workers to walk and work on the second screening platform 204, reduces the probability of workers tripping while working on the second screening platform 204, and improves safety.

[0042] Understandably, both the third traveling wheel 210 and the fourth traveling wheel 211 have inwardly oriented grooves on their outer circumferences. The second guide rail 212 is located within these grooves, guiding the third and fourth traveling wheels 210 and 211. The large radius of the third traveling wheel 210 allows it to move along the second guide rail 212 while also enabling stable movement on the second screening platform 204 after detaching from the second guide rail 212. In other words, the height of the grooves on the third traveling wheel 210... The height of the third traveling wheel 210 is the same as that of the second guide rail 212, so that when the third traveling wheel 210 is on the second guide rail 212, the outer edge of the third traveling wheel 210 can contact the second screening platform 204, which facilitates subsequent movement. When the third traveling wheel 210 is separated from the second guide rail 212, the third traveling wheel 210 can still move on the second screening platform 204. Moreover, since the fourth traveling wheel 211 is still on the second guide rail 212 during this process, it can guide the movement direction of the third traveling wheel 210, so that the second vibrating screen 202 can be moved to the maintenance and hoisting position.

[0043] In some feasible embodiments, a second flexible connection is provided between the under-screen discharge port of the second vibrating screen 202 and the feed port of the second scraper conveyor 206.

[0044] The second flexible connection is an electromagnetically attracted rubber flexible connection.

[0045] In this technical solution, the undersize discharge port of the second vibrating screen 202 and the feed port of the second scraper conveyor 206 are connected by a second flexible connection, specifically an electromagnetic attraction rubber flexible connection. During the screening operation, the discharge port and feed port of the electromagnetic attraction rubber flexible connection fit tightly together to form a seal, blocking the dust overflow path of the undersize material during the transfer process, improving the working environment in the screening room, and avoiding material waste. At the same time, the flexibility of the rubber material can effectively absorb the vibration generated by the second vibrating screen 202 during operation, preventing the vibration from being directly transmitted to the second scraper conveyor 206, preventing equipment resonance, component loosening, or accelerated wear caused by rigid connection, and achieving stable operation. Moreover, when the second vibrating screen 202 needs to be moved for maintenance, the electromagnetic attraction rubber flexible connection can be quickly disassembled, improving the convenience of operation.

[0046] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application. The above are merely preferred embodiments of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the protection scope of this application.

Claims

1. A vibrating screening system, characterized in that, include: Screening room; The first screening component (10) is disposed in the screening chamber. The first screening component (10) includes a first fixed frame (101), a first vibrating screen (102) and a first undersize hopper (103). A first screening platform (104) is disposed on the first fixed frame (101). The first vibrating screen (102) is movably disposed on the first screening platform (104). The first undersize hopper (103) is disposed on the first fixed frame (101) and located below the first screening platform (104) for storing the undersize material of the first vibrating screen (102). The system also includes a first scraper conveyor (105), which is mounted on the first screening platform (104) and located between the first vibrating screen (102) and the first undersize hopper (103). The feed inlet of the first scraper conveyor (105) is connected to the undersize discharge outlet of the first vibrating screen (102). The first scraper conveyor (105) is mounted along the length of the opening of the first undersize hopper (103), and an elongated discharge port covering the length of the opening of the first undersize hopper (103) is provided below it.

2. The vibrating screening system according to claim 1, characterized in that, The first vibrating screen (102) is symmetrically provided with a first traveling wheel (106) at its first end and a second traveling wheel (107) at its second end. The first screening platform (104) is symmetrically provided with a first guide rail (108). The first traveling wheel (106) and the second traveling wheel (107) are rotatably mounted on the first guide rail (108). The radius of the first traveling wheel (106) is greater than the radius of the second traveling wheel (107), and the radius of the first traveling wheel (106) is greater than the height of the first guide rail (108). After the first traveling wheel (106) is separated from the first guide rail (108), its outer edge can directly contact the first screening platform (104).

3. The vibrating screening system according to claim 2, characterized in that, A first flexible connection (109) is provided between the under-screen discharge port of the first vibrating screen (102) and the feed port of the first scraper conveyor (105).

4. The vibrating screening system according to claim 1, characterized in that, It also includes a second screening component (20), which is disposed in the screening chamber. The second screening component (20) includes a second fixed frame (201), a second vibrating screen (202), and a belt conveyor (203). The second fixed frame (201) is provided with a second screening platform (204) and a conveying platform (205). The second vibrating screen (202) is movably disposed on the second screening platform (204). The belt conveyor (203) is disposed on the conveying platform (205). A second scraper conveyor (206) is disposed between the second vibrating screen (202) and the belt conveyor (203).

5. The vibrating screening system according to claim 4, characterized in that, The feed inlet of the second scraper conveyor (206) is connected to the under-screen discharge outlet of the second vibrating screen (202). The bottom of the second scraper conveyor (206) is provided with a first discharge pipe (207) and a second discharge pipe (208). The first discharge pipe (207) is connected to the feed inlet of the belt conveyor (203), and the second discharge pipe (208) is connected to the bypass chute.

6. The vibrating screening system according to claim 5, characterized in that, The first discharge pipe (207) and the second discharge pipe (208) are vertically arranged at the bottom of the second scraper conveyor (206).

7. The vibrating screening system according to claim 6, characterized in that, Both the first discharge pipe (207) and the second discharge pipe (208) are equipped with electric valves (209).

8. The vibrating screening system according to claim 7, characterized in that, The second vibrating screen (202) has a third traveling wheel (210) symmetrically arranged at its first end and a fourth traveling wheel (211) symmetrically arranged at its second end. The second screening platform (204) has a second guide rail (212) symmetrically arranged on it. The third traveling wheel (210) and the fourth traveling wheel (211) are rotatably arranged on the second guide rail (212). The radius of the third traveling wheel (210) is greater than the radius of the fourth traveling wheel (211), and the radius of the third traveling wheel (210) is greater than the height of the second guide rail (212). After the third traveling wheel (210) is separated from the second guide rail (212), its outer edge can directly contact the second screening platform (204).

9. The vibrating screening system according to claim 8, characterized in that, A second flexible connection is provided between the under-screen discharge port of the second vibrating screen (202) and the feed port of the second scraper conveyor (206).

10. The vibrating screening system according to claim 9, characterized in that, The second flexible connection is an electromagnetically attracted rubber flexible connection.

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