Multi-level sand dust vibration screening device

Abstract

The invention discloses a multi-stage sand and dust vibration screening device, belongs to the technical field of vibration screening, and provides the following scheme that the multi-stage sand and dust vibration screening device comprises a multi-stage sand and dust screening mechanism, amplitude adjusting mechanisms are arranged on the two sides of the multi-stage sand and dust screening mechanism, and the multi-stage sand and dust screening mechanism comprises a guide support assembly; three sets of detachable elastic assemblies are arranged on the guide support assembly and connected with the three screen frame structures correspondingly, and linkage guide rollers are arranged on the two sides of each screen frame structure. According to the sand dust screening device, the detachable elastic assemblies slide on the mounting guide rods, then the distance between the screen frame structures can be adjusted, therefore, the interval between every two layers of the screen frame structures can be flexibly adjusted according to the actual screening situation, the sand dust screening requirement is met, and the problem that due to the fixed interval, part of screening layers are blocked is solved; the detachable elastic assembly can be directly detached from the installation guide rod, and rapid maintenance or replacement is facilitated.

Description

Technical Field

[0001] This invention relates to the field of vibration screening technology, and in particular to a multi-stage sand and dust vibration screening device. Background Technology

[0002] Desert regions are rich in sand resources, but the particle size distribution of natural desert sand is wide and uneven. In fields such as the foundation ballast of photovoltaic power stations and sand used in sand and dust environmental tests, it is necessary to screen sand with a specific, small range of uniform particle sizes. In existing technologies, the spacing of the multi-layer screening structure in common sand and dust screening devices is generally fixed, making it difficult to flexibly adjust according to different usage conditions. Furthermore, the disassembly and assembly process of the screening plates is cumbersome, requiring long downtime for replacement or maintenance. Simultaneously, multi-layer screening structures often use a uniform vibration amplitude. While this allows for uniform adjustment of the overall vibration amplitude, it is difficult to perform rapid, step-by-step adjustments of different vibration amplitudes across multiple layers based on the actual sand particle characteristics to adapt to the needs of different screening levels (e.g., the upper layer requires large amplitude to separate coarse particles, while the lower layer requires small amplitude to reduce fine sand accumulation). This results in low screening efficiency and poor target particle size accuracy, failing to meet the practical application requirements for precise screening of desert sand. To address these problems, this invention proposes a multi-stage sand and dust vibration screening device. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing sand and dust screening devices, where the spacing of the multi-layer screening structure is generally fixed, making it difficult to flexibly adjust according to different usage conditions, and the screening plate disassembly and assembly process is cumbersome, requiring long downtime for replacement or maintenance; at the same time, the multi-layer screening structure is difficult to adjust the vibration amplitude of multiple layers in a rapid stepwise manner according to the actual sand particle conditions, resulting in low screening efficiency and poor target particle size accuracy, which makes it difficult to meet the actual application requirements of precise screening of desert sand. Therefore, a multi-layer sand and dust vibration screening device is proposed.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A multi-stage sand and dust vibration screening device includes a multi-stage sand and dust screening mechanism, and an amplitude adjustment mechanism is provided on both sides of the multi-stage sand and dust screening mechanism. The multi-stage sand and dust screening mechanism includes a guide support assembly, on which three sets of detachable elastic components are provided. The three sets of detachable elastic components are respectively connected to three screen frame structures, and linkage guide rollers are provided on both sides of the screen frame structure. The amplitude adjustment mechanism includes an adjustment component, and an amplitude switching component is provided above the adjustment component. The adjustment component and the amplitude switching component work together to realize the amplitude adjustment of the swing component. The movable locking tooth plate of the amplitude switching component is locked with the fixed locking tooth plate of the swing component. The three linkage guide rollers are arranged in the adjustment frame of the amplitude switching component, and a vibration component is provided on the swing component.

[0005] Preferably, a screen frame outlet is provided on one side of the screen frame structure, and the screen frame outlets are staggered.

[0006] Preferably, the guide bracket assembly includes a mounting bracket, four mounting guide rods are fixedly connected to the top of the mounting bracket, mounting sleeves are fixed to the top of the mounting guide rods by bolts, and two mounting sleeves are fixedly connected to the same fixed top plate.

[0007] Preferably, each group of detachable elastic components comprises four components, each detachable elastic component including a guide sleeve and two connectors. Three guide sleeves slide on the same mounting guide rod. The guide sleeves are hinged to the movable rod via pins, and the movable rod is also hinged to the screen frame structure via pins.

[0008] Preferably, a vibration spring is fixedly connected between the two connecting members, and the two connecting members are respectively fixedly connected to the screen frame structure and the guide sleeve.

[0009] Preferably, the adjustment assembly includes two electric push rods, which are fixedly mounted on the mounting bracket, and one end of each electric push rod is fixedly connected to a fixing plate.

[0010] Preferably, the amplitude switching component includes a connecting seat, on which a slide rod is fixedly installed. The slide rod is slidably connected to two guide sleeves, and one side of each guide sleeve is fixedly connected to a fixing sleeve. The two guide sleeves are fixedly installed on a fixing plate.

[0011] Preferably, two transverse rods are provided on the connecting seat, one end of the two transverse rods is fixedly connected to a movable part, one side of the movable part is fixedly connected to a movable locking tooth plate, and both ends of the movable part are fixedly connected to a locking rod, the locking rod being adapted to the shape of the fixed sleeve; The other ends of the two transverse rods are fixedly connected to a connecting plate, which is mounted on a nut. The nut is threaded onto a screw rod, which is rotatably mounted on a connecting seat via a bearing. One end of the screw rod is fixedly connected to a handle.

[0012] Preferably, the swing assembly includes an adjusting swing frame, a rotating swing shaft is fixedly connected to the lower part of the adjusting swing frame, the rotating swing shaft is rotatably mounted on the connecting seat through a bearing, mounting guide rails are fixedly connected to both sides of the adjusting swing frame, and a detachable part is provided on the top of the adjusting swing frame.

[0013] Preferably, the vibration assembly includes two adjusting slide rails, which are fixed to the mounting guide rail by bolts. A mounting cover is fixedly connected to one side of each of the two adjusting slide rails, and the vibration device is fixedly installed in the mounting cover. Beneficial effects

[0014] This multi-stage sand and dust vibration screening device allows for adjustment of the distance between screen frame structures by sliding a detachable elastic component on the mounting guide rod. This enables flexible adjustment of the spacing between each level of the screen frame structure according to the actual screening situation, meeting the requirements of sand and dust screening and avoiding the problem of material blockage in some screening layers caused by fixed spacing. Furthermore, the detachable elastic component can be directly removed from the mounting guide rod for easy maintenance or replacement. This multi-level sand and dust vibration screening device allows for adjustment of the position of the vibrating equipment by sliding the slide rail on the mounting guide rail. This enables unified adjustment of the vibration amplitude of the screen frame structure during operation via a detachable elastic component. Furthermore, the movable and fixed locking tooth discs are locked together, allowing the adjustment component to directly adjust the vertical position of the swing frame and the vibrating component. Then, the amplitude switching component separates the movable and fixed locking tooth discs, at which point the locking rod engages with the fixed sleeve, allowing the swing frame to rotate around its pivot axis. This allows for step-by-step adjustment of the vibration amplitude of each screen frame structure, facilitating adaptation to different screening levels and improving screening efficiency. This multi-level sand and dust vibration screening device allows for individual spacing adjustment of each screen frame structure through the sliding adjustment of the detachable elastic component on the guide support. Furthermore, the vibration component can further adjust the overall vibration amplitude of the screen frame structure by sliding the swing component. Secondly, the amplitude switching component removes the fixation of the swing component, allowing the swing component to move around the rotating pendulum. At the same time, the adjustment component further adjusts the vertical position of the swing component. By adjusting different spacing and flexibly adjusting different vibration amplitudes, the device can maximize the effect of sand and dust separation and efficient screening, thus meeting the practical application needs of precise screening of desert sand. Attached Figure Description

[0015] Figure 1 This is a perspective view of a multi-stage sand and dust vibration screening device proposed in this invention; Figure 2 This is a perspective view of the connection between the guide support assembly and the shell-removing elastic assembly of a multi-level sand and dust vibration screening device proposed in this invention. Figure 3 This is a perspective view of the connection between the detachable elastic component and the screen frame structure of a multi-stage sand and dust vibration screening device proposed in this invention. Figure 4 This is a perspective view of the sieve frame structure of a multi-stage sand and dust vibration screening device proposed in this invention; Figure 5 This is a perspective view of a detachable elastic component of a multi-stage sand and dust vibration screening device proposed in this invention. Figure 6 This is a perspective view of the connection between the adjustment component and the guide support component of a multi-stage sand and dust vibration screening device proposed in this invention; Figure 7This is a perspective view of the mounting guide rod of a multi-stage sand and dust vibration screening device proposed in this invention; Figure 8 This is a perspective view of the connection between the oscillating component and the vibration component of a multi-stage sand and dust vibration screening device proposed in this invention; Figure 9 This is a cross-sectional perspective view of the oscillating component of a multi-stage sand and dust vibration screening device proposed in this invention; Figure 10 This is a perspective view of the amplitude switching component of a multi-stage sand and dust vibration screening device proposed in this invention.

[0016] In the diagram: 100. Multi-stage sand and dust screening mechanism; 101. Guide support assembly; 1011. Mounting and fixing frame; 1012. Mounting guide rod; 1013. Mounting sleeve; 1014. Fixed top plate; 102. Detachable elastic component; 1021. Guide sleeve; 1022. Movable rod; 1023. Connector; 1024. Vibration spring; 103. Screen frame structure; 104. Screen frame discharge port; 105. Linkage guide roller; 200. Amplitude adjustment mechanism; 201. Adjustment component; 2011. Electric push rod; 2012. Fixing plate; 202. Swing component; 2021. Adjusting swing frame. ; 2022, Rotating swing shaft; 2023, Installing guide rail; 2024, Fixing locking gear plate; 2025, Detachable part; 203, Vibration assembly; 2031, Installing protective cover; 2032, Vibration equipment; 2033, Adjusting slide rail; 204, Amplitude switching assembly; 2041, Guide sleeve; 2042, Slide rod; 2043, Connecting seat; 2044, Horizontal rod; 2045, Connecting plate; 2046, Nut; 2047, Screw; 2048, Handle; 2049, Fixing sleeve; 20410, Locking rod; 20411, Moving part; 20412, Moving locking gear plate. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0018] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", 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 this invention and simplifying the description, and do not 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 limitations on this invention.

[0019] Example 1: Refer to Figures 1-7A multi-stage sand and dust vibration screening device includes a multi-stage sand and dust screening mechanism 100, and an amplitude adjustment mechanism 200 is provided on both sides of the multi-stage sand and dust screening mechanism 100. The multi-stage sand and dust screening mechanism 100 includes a guide support assembly 101, which includes a mounting bracket 1011. Four mounting guide rods 1012 are fixedly connected to the upper part of the mounting bracket 1011. Mounting sleeves 1013 are bolted to the upper part of the mounting guide rods 1012. By removing the mounting sleeves 1013, the guide sleeves 1021 can be easily removed from the mounting guide rods 1012, facilitating the disassembly of the screen frame structure 103. Two mounting sleeves 1013 are fixedly connected to the same fixed top plate 1014. The guide support assembly 101 is provided with three sets of detachable elastic components 102, each set containing four detachable elastic components 102. Each detachable elastic component 102 includes a guide sleeve 1021 and two connecting pieces 1023. The three guide sleeves 1021 slide on the same mounting guide rod 1012. By sliding the guide sleeves 1021 on the mounting guide rod 1012, the distance between the screen frame structures 103 can be smoothly adjusted. The guide sleeves 1021 are hinged to the movable rod 1022 by a pin, and the movable rod 1022 and the screen frame are connected by the pin. The structure 103 is connected to allow the screen frame structure 103 to vibrate smoothly. The movable rod 1022 is also hinged to the screen frame structure 103 via a pin. A vibration spring 1024 is fixedly connected between the two connecting parts 1023. Through the elastic deformation of the vibration spring 1024, the screen frame structure 103 can be assisted to vibrate smoothly, facilitating the sand and dust screening operation. The two connecting parts 1023 are fixedly connected to the screen frame structure 103 and the guide sleeve 1021 respectively. The three sets of detachable elastic components 102 are respectively connected to three The screen frame structure 103 is connected, and the aperture of the screen frame structure 103 decreases from top to bottom, so that the screen frame structure 103 can be graded and screened. A screen frame discharge port 104 is provided on one side of the screen frame structure 103, and the screen frame discharge ports 104 are staggered. By vibrating the screen frame structure 103, the intercepted coarse sand can be moved to the screen frame discharge port 104 and discharged smoothly. The staggered screen frame discharge ports 104 facilitate the separation of each layer of sand. Both sides of the screen frame structure 103 are provided with linkage guide rollers 105. The amplitude adjustment mechanism 200 includes an adjustment component 201, and an amplitude switching component 204 is arranged above the adjustment component 201. The adjustment component 201 and the amplitude switching component 204 work together to realize the amplitude adjustment of the swing component 202. The movable locking tooth plate 20412 of the amplitude switching component 204 is locked with the fixed locking tooth plate 2024 of the swing component 202. Three linkage guide rollers 105 are arranged in the adjustment swing frame 2021 of the amplitude switching component 204, and a vibration component 203 is arranged on the swing component 202.

[0020] In this embodiment: the distance between the screen frame structures 103 can be adjusted by sliding the detachable elastic component 102 on the mounting guide rod 1012. This allows for flexible adjustment of the spacing between each layer of the screen frame structure 103 according to the actual screening situation, meeting the requirements for sand and dust screening and avoiding the problem of material blockage in some screening layers caused by fixed spacing. Furthermore, the detachable elastic component 102 can be directly removed from the mounting guide rod 1012 for easy maintenance or replacement.

[0021] Example 2: Refer to Figures 8-10 A multi-stage sand and dust vibration screening device includes an adjustment component 201, which includes two electric push rods 2011. The position of the fixed plate 2012 can be adjusted by the electric push rods 2011, so that the fixed plate 2012 drives the swing component 202 to move up and down through the amplitude switching component 204, thereby adjusting the range of motion of the swing component 202. The electric push rods 2011 are fixedly installed on the mounting bracket 1011, and one end of the two electric push rods 2011 is fixedly connected to the fixed plate 2012. The amplitude switching component 204 includes a connecting seat 2043, on which a slide rod 2042 is fixedly mounted. The slide rod 2042 is slidably connected in two guide sleeves 2041. During the locking process of the movable locking tooth plate 20412 and the fixed locking tooth plate 2024, when the adjusting swing frame 2021 moves, the slide rod 2042 can slide in the guide sleeves 2041 to ensure the smooth movement of the adjusting swing frame 2021. A fixing sleeve is fixedly connected to one side of each of the two guide sleeves 2041. 2049, and two guide sleeves 2041 are fixedly installed on the fixed plate 2012. Two transverse rods 2044 are provided on the connecting seat 2043. The transverse rods 2044 can slide smoothly on the connecting seat 2043, so that the nut 2046 can move smoothly. In this way, the transverse rods 2044 can smoothly adjust the position of the movable part 20411, so that the movable part 20411 can control the locking state of the movable locking tooth plate 20412 and the fixed locking tooth plate 2024, as well as control the locking rod 20. With 410 and the fixed sleeve 2049 engaged, one end of each of the two transverse rods 2044 is fixedly connected to a movable part 20411. A movable locking tooth disc 20412 is fixedly connected to one side of the movable part 20411. Both ends of the movable part 20411 are fixedly connected to locking rods 20410. The locking rods 20410 are shaped to match the fixed sleeve 2049. The engagement of the locking rods 20410 and the fixed sleeve 2049 locks the overall position of the amplitude switching assembly 204. A connecting plate 2045 is fixedly connected to the other end of the rod 2044. The connecting plate 2045 is installed on the nut 2046. The nut 2046 is threadedly connected to the screw 2047. The screw 2047 is rotatably mounted on the connecting seat 2043 through a bearing. A handle 2048 is fixedly connected to one end of the screw 2047. The handle 2048 can provide a force application point, thereby facilitating the control of the rotation of the screw 2047 and enabling smooth thread transmission between the screw 2047 and the nut 2046. The swing assembly 202 includes an adjustable swing frame 2021. By adjusting the opening on the swing frame 2021, the swing frame 2021 can move on the linkage guide roller 105 through the opening. Simultaneously, the linkage guide roller 105 can drive the screen frame structure 103 to vibrate. A rotating swing shaft 2022 is fixedly connected to the lower part of the adjustable swing frame 2021. The rotating swing shaft 2022 is rotatably mounted on the connecting seat 2043 via bearings. When the movable locking tooth disc 20412 separates from the fixed locking tooth disc 2024, the rotating swing shaft 2022 can rotate smoothly through the bearings, thereby allowing the adjustable swing frame 2021 to move with the rotating swing shaft 2022. This allows the adjustable swing frame 2021 to drive each layer of the screen frame structure 103 to vibrate at different amplitudes via the linkage guide roller 105. The two sides of the adjustable swing frame 2021... All components are fixedly connected to mounting guide rails 2023. The top of the adjusting swing frame 2021 is provided with a detachable part 2025, which can be removed from the adjusting swing frame 2021, so that the linkage guide roller 105 can be removed from the adjusting swing frame 2021, and the screen frame structure 103 can be disassembled smoothly. The vibration component 203 includes two adjusting slide rails 2033, which are fixed to the mounting guide rails 2023 by bolts. The adjusting slide rails 2033 can slide on the mounting guide rails 2023, thereby adjusting the position of the vibration component 203. A mounting cover 2031 is fixedly connected to one side of the two adjusting slide rails 2033, which can protect the vibration device 2032. The vibration device 2032 is fixedly installed in the mounting cover 2031.

[0022] In this embodiment: the position of the vibrating device 2032 can be adjusted by sliding the slide rail 2033 on the mounting guide rail 2023, so that the vibration amplitude of the screen frame structure 103 can be uniformly adjusted by the detachable elastic component 102 during the operation of the vibrating device 2032. Furthermore, by locking the movable locking tooth plate 20412 with the fixed locking tooth plate 2024, the electric push rod 2011 can adjust the position of the fixed plate 2012, allowing the fixed plate 2012 to drive the amplitude switching component 204 to move. This, in turn, allows direct adjustment of the vertical position of the swing frame 2021 and the vibrating component 203. Rotating the screw 2047 via the handle 2048 causes the screw 2047 and nut 2046 to move, which in turn drives the connecting plate 2045 and the transverse rod 2044. The transverse rod 2044 then drives the movable part 20411 to move, causing the movable locking tooth plate 20412 to separate from the fixed locking tooth plate 2024. Simultaneously, the locking rod 20410 engages with the fixed sleeve 2049, allowing the adjusting swing frame 2021 to rotate the swing shaft 2022. This enables step-by-step adjustment of the vibration amplitude of each layer of the screen frame structure 103, facilitating adaptation to the needs of different screening levels and improving screening efficiency.

[0023] Example 3: Reference Figures 1-4 , Figures 6-7 and Figure 9A multi-stage sand and dust vibration screening device includes a multi-stage sand and dust screening mechanism 100. The multi-stage sand and dust screening mechanism 100 includes a guide support assembly 101. Three sets of detachable elastic components 102 are provided on the guide support assembly 101. The three sets of detachable elastic components 102 are respectively connected to three screen frame structures 103. Linkage guide rollers 105 are provided on both sides of the screen frame structure 103. The amplitude adjustment mechanism 200 includes an adjustment component 201, and an amplitude switching component 204 is arranged above the adjustment component 201. The adjustment component 201 and the amplitude switching component 204 work together to realize the amplitude adjustment of the swing component 202. The movable locking tooth plate 20412 of the amplitude switching component 204 is locked with the fixed locking tooth plate 2024 of the swing component 202. Three linkage guide rollers 105 are arranged in the adjustment swing frame 2021 of the amplitude switching component 204, and a vibration component 203 is arranged on the swing component 202.

[0024] In this embodiment: by sliding the detachable elastic component 102 on the guide bracket, the spacing of each layer of screen frame structure 103 can be adjusted individually, and the vibration component 203 can further adjust the overall vibration amplitude of the screen frame structure 103 by sliding the swing component 202. Secondly, by removing the fixation of the swing component 202 by the amplitude switching component 204, the swing component 202 can move by rotating the swing shaft 2022. At the same time, the adjustment component 201 further adjusts the up and down position of the swing component 202. In this way, by adjusting different spacing and flexibly adjusting different vibration amplitudes, the effect of sand and dust separation and efficient screening can be maximized, thereby meeting the actual application requirements of precise screening of desert sand.

[0025] Working principle: Before sand screening, the distance between the screen frame structures 103 can be adjusted by the sliding of the guide sleeve 1021 on the mounting guide rod 1012. After adjustment, the guide sleeve 1021 is fixed by bolts. At the same time, the position of the vibrating device 2032 can be adjusted by the sliding of the slide rail 2033 on the mounting guide rail 2023, thereby adjusting the overall movement amplitude. Vibration of the vibrating device 2032 causes the vibrating device 2032 to drive the adjusting swing frame 2021 to move. The adjusting swing frame 2021, together with the linkage guide roller 105 and the vibration spring 1024, can realize the vibration operation of the screen frame structure 103, so that the screen frame structure 103 can smoothly carry out sand screening operation. The sand filtered on the screen frame structure 103 is discharged through the screen frame discharge port 104. The screen frame structure 103 has three layers for grading and screening operations. When it is necessary to adjust the vibration amplitude between each layer of screen frame structure 103, the amplitude switching component 204 is moved by the electric push rod 2011, so that the movable locking tooth plate 20412 drives the swing component 202 and the vibration component 203 to move through the fixed locking tooth plate 2024. After adjustment, the screw 2047 is rotated by the handle 2048, so that the screw 2047 and the nut 2046 are threadedly driven. The nut 2046 drives the connecting plate 2045 and the transverse rod 2044 to move. The transverse rod 2044 drives the movable part 20411 to move. The movable part 20411 drives the movable locking tooth plate 20412 to separate from the fixed locking tooth plate 2024. At the same time, the clamping rod 20410 is inserted into the fixed clamping sleeve 2049. At this time, the vibration equipment 2032 is running, so that the adjusting swing frame 2021 moves by rotating the swing shaft 2022, so that each layer of screen frame structure 103 vibrates at different amplitudes to perform sand screening.

[0026] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A multi-stage sand and dust vibration screening device, comprising a multi-stage sand and dust screening mechanism (100), characterized in that, Both sides of the multi-stage sand and dust screening mechanism (100) are equipped with amplitude adjustment mechanisms (200). The multi-stage sand and dust screening mechanism (100) includes a guide support assembly (101), on which three sets of detachable elastic components (102) are provided. The three sets of detachable elastic components (102) are respectively connected to three screen frame structures (103). Linkage guide rollers (105) are provided on both sides of the screen frame structure (103). The amplitude adjustment mechanism (200) includes an adjustment component (201), and an amplitude switching component (204) is provided above the adjustment component (201). The adjustment component (201) and the amplitude switching component (204) work together to realize the amplitude adjustment of the swing component (202). The movable locking tooth plate (20412) of the amplitude switching component (204) is locked with the fixed locking tooth plate (2024) of the swing component (202). The three linkage guide rollers (105) are arranged in the adjustment swing frame (2021) of the amplitude switching component (204), and a vibration component (203) is provided on the swing component (202).

2. The multi-stage sand and dust vibration screening device according to claim 1, characterized in that, The screen frame structure (103) has a screen frame outlet (104) on one side, and the screen frame outlets (104) are staggered.

3. The multi-stage sand and dust vibration screening device according to claim 1, characterized in that, The guide bracket assembly (101) includes a mounting bracket (1011), and four mounting guide rods (1012) are fixedly connected to the top of the mounting bracket (1011). Mounting sleeves (1013) are fixed to the top of the mounting guide rods (1012) by bolts. Two mounting sleeves (1013) are fixedly connected to the same fixed top plate (1014).

4. The multi-stage sand and dust vibration screening device according to claim 3, characterized in that, The number of each set of the detachable elastic components (102) is four. Each detachable elastic component (102) includes a guide sleeve (1021) and two connectors (1023). The three guide sleeves (1021) slide on the same mounting guide rod (1012). The guide sleeves (1021) are hinged to the movable rod (1022) by a pin. The movable rod (1022) is also hinged to the screen frame structure (103) by a pin.

5. A multi-stage sand and dust vibration screening device according to claim 4, characterized in that, A vibration spring (1024) is fixedly connected between the two connecting parts (1023), and the two connecting parts (1023) are fixedly connected to the screen frame structure (103) and the guide sleeve (1021) respectively.

6. A multi-stage sand and dust vibration screening device according to claim 3, characterized in that, The adjustment assembly (201) includes two electric push rods (2011), which are fixedly mounted on the mounting bracket (1011), and one end of each electric push rod (2011) is fixedly connected to a fixing plate (2012).

7. A multi-stage sand and dust vibration screening device according to claim 6, characterized in that, The amplitude switching component (204) includes a connecting seat (2043), on which a slide rod (2042) is fixedly installed. The slide rod (2042) is slidably connected in two guide sleeves (2041). A fixing sleeve (2049) is fixedly connected to one side of each of the two guide sleeves (2041), and the two guide sleeves (2041) are fixedly installed on a fixing plate (2012).

8. A multi-stage sand and dust vibration screening device according to claim 7, characterized in that, Two horizontal rods (2044) are provided on the connecting seat (2043). One end of the two horizontal rods (2044) is fixedly connected to a movable part (20411). A movable locking tooth disc (20412) is fixedly connected to one side of the movable part (20411). Both ends of the movable part (20411) are fixedly connected to a locking rod (20410). The locking rod (20410) is adapted to the shape of the fixed sleeve (2049). The other ends of the two transverse rods (2044) are fixedly connected to a connecting plate (2045), the connecting plate (2045) is mounted on a nut (2046), the nut (2046) is threadedly connected to a screw (2047), the screw (2047) is rotatably mounted on a connecting seat (2043) through a bearing, and one end of the screw (2047) is fixedly connected to a handle (2048).

9. A multi-stage sand and dust vibration screening device according to claim 7, characterized in that, The swing assembly (202) includes an adjustable swing frame (2021), a rotating swing shaft (2022) is fixedly connected to the lower part of the adjustable swing frame (2021), the rotating swing shaft (2022) is rotatably mounted on the connecting seat (2043) through a bearing, mounting guide rails (2023) are fixedly connected to both sides of the adjustable swing frame (2021), and a detachable part (2025) is provided on the top of the adjustable swing frame (2021).

10. A multi-stage sand and dust vibration screening device according to claim 9, characterized in that, The vibration assembly (203) includes two adjusting slide rails (2033), which are fixed to the mounting guide rail (2023) by bolts. A mounting cover (2031) is fixedly connected to one side of the two adjusting slide rails (2033), and a vibration device (2032) is fixedly installed in the mounting cover (2031).

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