Sand grain screening device

Abstract

A sand grain screening device comprises a vibration assembly; the supporting assembly comprises a base, a supporting rod and a locking piece, the base is connected to the vibration assembly, the supporting rod is connected to the base, and the locking piece is connected to the supporting rod; the screening assembly comprises a chassis and a plurality of screening boxes, the chassis is arranged on the base, the screening boxes are sequentially stacked on the chassis, each screening box comprises a box wall, a screen and a plurality of positioning pieces, the screen is connected to the box wall, the positioning pieces are distributed on the outer side of the box wall, one end of each positioning piece is provided with a positioning hole, the other end of each positioning piece is provided with a positioning part, and the positioning parts are inserted into the positioning holes of the positioning pieces on the adjacent box wall; the pressing and holding assembly comprises a connecting piece, an adjusting piece, a handle, a pressing plate and a cover plate, the connecting piece is connected with the locking piece, the adjusting piece is connected with the connecting piece, the adjusting piece is connected with the handle and provided with a spherical part, the spherical part is clamped by the pressing plate and the cover plate, and the cover plate is used for covering the screen box on the uppermost layer. The sand grain screening device can screen sand grains, and the effects that the screen is convenient to install and replace, and operation is easy are achieved.

Description

Technical Field

[0001] The present application relates to the field of sandblasting technology, and in particular to a sand screening device. Background Art

[0002] Sandblasting is a surface treatment technology that uses compressed air as a power source to spray sand particles at high speed through a special nozzle to impact the surface of an object, so as to remove scale, rust, coating, impurities, or form a preset roughness. In the sandblasting process, it is very important to screen the sand particles. The purpose of screening is to control the sand particle size to meet different operation requirements, ensure the quality and efficiency of surface treatment, avoid damage to the workpiece surface due to excessive sand particles or incomplete cleaning due to too small sand particles, and effectively prevent the sandblasting equipment from being blocked, improve work efficiency and ensure operation safety.

[0003] At present, the commonly used screening machines on the market have multiple limit posts around the screen to improve the stability of the screen in the vertical direction. However, this method requires all the screens on the upper side to be removed when replacing a certain screen, which is troublesome to operate. In addition, in order to improve the stability of the cover plate pressing on the screen, multiple locking structures are usually set on the cover plate, which is cumbersome to operate and has low working efficiency. Utility Model Content

[0004] In view of the above, it is necessary to propose a sand screening device that can screen sand and achieve the effects of convenient installation and replacement of the screen and simple operation.

[0005] The embodiment of the present application provides a sand screening device, comprising: a vibration component; a support component, comprising a base, a support rod and a locking piece, the base is connected to the vibration component, the support rod is connected to the side of the base facing away from the vibration component, and the locking piece is connected to the support rod; the screening component comprises a chassis and a plurality of screening boxes, the chassis is arranged on the base, a plurality of the screening boxes are stacked on the chassis in sequence, the screening box comprises a box wall, a screen and a plurality of positioning members, the screen is connected to the inner side of the box wall, a plurality of the positioning members are distributed on the outer peripheral side of the box wall in sequence, a positioning hole is opened at one end of the positioning member, a positioning portion is arranged at the other end of the positioning member, and the positioning portion is inserted into Inserted into the positioning hole of the positioning piece on the adjacent box wall to fix the adjacent screen box; and a pressing assembly, including a connecting piece, an adjusting piece, a handle, a pressing plate and a cover plate, the connecting piece is detachably connected to the locking piece, the adjusting piece is threadedly connected to the connecting piece, one end of the adjusting piece is connected to the handle, and the other end of the adjusting piece is provided with a spherical portion, the pressing plate and the cover plate are connected and cooperate to clamp the spherical portion so that the pressing plate and the cover plate are rotatably connected to the adjusting piece, the pressing plate is arranged on the side of the cover plate facing the connecting piece, and the cover plate is arranged on the side of the pressing plate away from the connecting piece, and the cover plate covers the topmost screen box.

[0006] The above-mentioned sand screening device realizes efficient screening through a vibration component. The support component including a base, a support rod and a locking member ensures the stability and reliability of the overall structure and facilitates the installation and fixation of the equipment. The screening component includes a chassis and a plurality of screen boxes that can be stacked in sequence. The screen inside each screen box can accurately separate sand particles of different particle sizes. By setting a positioning member, each screen box can be quickly and accurately fixed and disassembled, which is convenient for replacing or cleaning the screen. The holding component includes a connector, an adjustment member, a handle, a pressure plate and a cover plate, which can flexibly adjust the pressure on the top screen box to ensure the stability of the screen box during the screening process. At the same time, the pressing force can be easily adjusted by turning the handle, which improves the convenience and work efficiency of the sand screening device. The detachable connection design between the components, such as the rotational connection between the connector and the locking member, the pressure plate and the cover plate and the adjustment member, makes the entire device easy to maintain and clean after use, and is also convenient for replacing and assembling components.

[0007] In some embodiments, the pressing assembly also includes a limiting rod, which is connected to the connecting member and arranged toward the pressure plate. The pressure plate is provided with a limiting hole corresponding to the limiting rod. One end of the limiting rod away from the connecting member is movably inserted into the limiting hole. The limiting rod cooperates with the limiting hole to horizontally limit the cover plate and the pressure plate when the pressure plate and the cover plate are close to or away from the connecting member.

[0008] In some embodiments, the support rod is provided with a plurality of spaced-apart positioning grooves, the locking member is engaged with the positioning grooves, each positioning groove corresponds to a layer of the screen box, and the vertical height of each positioning groove is higher than the height of the corresponding screen box, so that after the connecting member is connected to the locking member, the height of the connecting member is higher than the height of the screen box corresponding to the positioning groove to which the locking member is engaged.

[0009] In some embodiments, the sum of the distance between one end of the limit rod inserted into the limit hole and the connecting member and the thickness of the cover plate is smaller than the distance between the topmost screen box and the connecting member, and when the cover plate abuts against the limit rod, the cover plate is separated from the topmost screen box.

[0010] In some embodiments, a limiting portion is provided on the side of the connecting member facing away from the pressure plate, and the limiting portion is provided around the adjusting member. The limiting portion limits the vertical movement distance of the handle toward the connecting member, thereby limiting the vertical movement distance of the pressure plate and the cover plate toward the screen box.

[0011] In some embodiments, the screen box further comprises a partition, and the box wall, the screen and the positioning member are all connected to the partition.

[0012] In some embodiments, the screen is detachably connected to the partition.

[0013] In some embodiments, a docking groove is formed on a side of the partition facing away from the box wall, and the horizontal cross-section of the docking groove is annular and its structure is adapted to the horizontal cross-section structure of the box wall.

[0014] In some embodiments, the mesh sizes of the sieves in the plurality of sieve boxes gradually decrease in a direction away from the bottom pan.

[0015] In some embodiments, a limiting seat is provided on a side of the base facing away from the vibration assembly, the limiting seat abuts against an outer side of the chassis provided on the base, and the limiting seat is used to limit the chassis. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the structure of a sand screening device provided in an embodiment of the present application.

[0017] Figure 2 for Figure 1 A schematic structural diagram of the support assembly in the sand screening device is shown.

[0018] Figure 3 for Figure 1 The schematic diagram of the exploded structure of the screening component and the holding component in the sand screening device is shown.

[0019] Figure 4 for Figure 3 The schematic diagram of the cross-sectional structure of the screen box in the screening assembly shown is along the IV-IV line.

[0020] Figure 5 for Figure 3 The schematic diagram of the cross-sectional structure of the holding assembly along line V-V is shown.

[0021] Main component symbols

[0022] Sand screening device 100

[0023] Vibration component 10

[0024] Support assembly 20

[0025] Base 21

[0026] Support rod 22

[0027] Positioning slot 221

[0028] Locking member 23

[0029] Limit seat 24

[0030] Screening components 30

[0031] Chassis 31

[0032] Screen box 32

[0033] Box wall 321

[0034] Screen 322

[0035] Positioning piece 323

[0036] Positioning hole 3231

[0037] Positioning unit 3232

[0038] Partition 324

[0039] Docking slot 3241

[0040] Pressing assembly 40

[0041] Connector 41

[0042] Limiting part 411

[0043] Adjustment 42

[0044] Spherical portion 421

[0045] Handle 43

[0046] Pressure plate 44

[0047] Limit hole 441

[0048] Cover 45

[0049] Limit rod 46 DETAILED DESCRIPTION

[0050] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0051] In the description of the present application, it should be understood that the terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, in the description of the present application, it should be noted that the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0052] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication, it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances. Some embodiments of the present application will be described in detail below in conjunction with the accompanying drawings.

[0053] The embodiments of the present application are further described below in conjunction with the accompanying drawings.

[0054] See also Figure 1 An embodiment of the present application provides a sand screening device 100 for screening sand (not shown). The sand screening device 100 includes a vibration assembly 10, a support assembly 20, a screening assembly 30 and a holding assembly 40.

[0055] Specifically, the vibration component 10 can be a vibrating machine, a vibration platform, etc. The vibration component 10 can vibrate the support component 20 and the screening component 30, etc., so that the sand to be screened can be effectively graded and screened in the screening component 30.

[0056] See also Figure 1 and Figure 2The support assembly 20 includes a base 21, a support rod 22 and a locking member 23. The base 21 is connected to the vibration assembly 10, the support rod 22 is connected to the side of the base 21 away from the vibration assembly 10, and the locking member 23 is connected to the support rod 22. The base 21 can be a plate-like structure, and the plate-like base 21 can improve the stability of supporting the screening assembly 30. The support rod 22 can be a columnar structure. In order to improve the stability of the support rod 22 supporting the holding assembly 40, two support rods 22 can be mirror-symmetrically arranged on the support assembly 20, and at the same time, two corresponding locking members 23 are arranged. The locking member 23 is movably connected to the support rod 22, and the position of the locking member 23 on the support rod 22 can be freely adjusted to facilitate the adjustment of the position of the holding assembly 40.

[0057] Please also see Figure 3 and Figure 4 The screening assembly 30 includes a chassis 31 and a plurality of screening boxes 32. The chassis 31 is arranged on the base 21. The plurality of screening boxes 32 are sequentially stacked on the chassis 31. The screening box 32 includes a box wall 321, a screen 322 and a plurality of positioning members 323. The screen 322 is connected to the inner side of the box wall 321. The plurality of positioning members 323 are sequentially distributed on the outer peripheral side of the box wall 321. A positioning hole 3231 is provided at one end of the positioning member 323. A positioning portion 3232 is provided at the other end of the positioning member 323. The positioning portion 3232 is inserted into the positioning hole 3231 of the positioning member 323 on the adjacent box wall 321 to fix the adjacent screening box 32. The screening box 32 may be a cylindrical structure. The screen 322 is arranged on the inner side of the box wall 321 so that the screen 322 cooperates with the box wall 321 to accommodate and screen the sand particles. The number of positioning members 323 can be two, three, four, etc., and the position of the positioning members 323 on each sieve box 32 is uniform. During installation, the chassis 31 is placed on the base 21, and then the sieve boxes 32 are placed in sequence, and the positioning portions 3232 in the positioning members 323 of the upper sieve box 32 are inserted into the positioning holes 3231 in the positioning members 323 of the lower sieve box 32, so that the multiple sieve boxes 32 are fixedly connected. The number of sieve boxes 32 can be two, three, four, five, etc., which is subject to actual needs and is not limited here.

[0058] Please also see Figure 4 The pressing assembly 40 includes a connecting member 41, an adjusting member 42, a handle 43, a pressing plate 44 and a cover plate 45. The connecting member 41 is detachably connected to the locking member 23, the adjusting member 42 is threadedly connected to the connecting member 41, one end of the adjusting member 42 is connected to the handle 43, and the other end of the adjusting member 42 is provided with a spherical portion 421. The pressing plate 44 and the cover plate 45 are connected and cooperate with the clamping spherical portion 421 to make the pressing plate 44 and the cover plate 45 rotatably connected to the adjusting member 42. The pressing plate 44 is arranged on the side of the cover plate 45 facing the connecting member 41, and the cover plate 45 is arranged on the side of the pressing plate 44 away from the connecting member 41. The cover plate 45 covers the topmost screen box 32.

[0059] The connecting member 41 may be a plate-like structure, and the locking member 23 may be provided with a groove-like structure, and the connecting member 41 may be inserted into the groove of the locking member 23. The locking member 23 and the connecting member 41 may be fixedly connected by bolts or the like, and it is also convenient to remove the connecting member 41 from the locking member 23. When two support rods 22 and two locking members 23 are provided, both ends of the connecting member 41 may be connected to the two locking members 23 at the same time to improve the stability of the connection between the connecting member 41 and the support rod 22.

[0060] The adjusting member 42 may be a cylindrical structure, and the handle 43 may be a rod-shaped structure. By rotating the handle 43, the adjusting member 42 may be driven to rotate, thereby causing the adjusting member 42 to move in the vertical direction relative to the connecting member 41. The pressing plate 44 and the cover plate 45 may be fixedly connected by bolts or the like to improve the stability of the connection between the pressing plate 44 and the cover plate 45. It is understood that a groove corresponding to the spherical portion 421 is provided between the pressing plate 44 and the cover plate 45 to accommodate the spherical portion 421. In this way, when the adjusting member 42 rotates, the pressing plate 44 and the cover plate 45 may not rotate, and the adjusting member 42 may drive the pressing plate 44 and the cover plate 45 to move in the vertical direction.

[0061] It can be understood that after the sieve box 32 is installed, the sand to be sieved can be added to the top sieve box 32, and then the pressing assembly 40 is installed, and the cover plate 45 is pressed against the top sieve box 32, and then the vibration assembly 10 is turned on to sieve the sand in the sieve box 32.

[0062] The sand screening device 100 provided in the embodiment of the present application realizes efficient screening through the vibration component 10, and the support component 20 ensures the stability and reliability of the overall structure, which facilitates the installation and fixation of the equipment. The screening component 30 includes a chassis 31 and a plurality of screen boxes 32 that can be stacked in sequence. The screen 322 inside each screen box 32 can accurately separate sand particles of different particle sizes. By setting the positioning member 323, each screen box 32 can be quickly and accurately fixed and disassembled, which is convenient for replacing or cleaning the screen 322. The holding component 40 includes a connecting member 41, an adjusting member 42, a handle 43, a pressing plate 44 and a cover plate 45, which can flexibly adjust the pressure on the top screen box 32 to ensure the stability of the screen box 32 during the screening process. At the same time, the pressing force can be easily adjusted by turning the handle 43, which improves the convenience of use and work efficiency. The detachable connection design between the various components, such as the rotational connection between the connecting member 41 and the locking member 23, the pressing plate 44 and the cover plate 45 and the adjusting member 42, makes the entire device easy to maintain and clean after use, and also facilitates the replacement and assembly of components.

[0063] See also Figure 3 and Figure 5In some embodiments, the holding assembly 40 further includes a limiting rod 46, which is connected to the connecting member 41 and disposed toward the pressing plate 44. The pressing plate 44 is provided with a limiting hole 441 corresponding to the limiting rod 46. One end of the limiting rod 46 away from the connecting member 41 is movably inserted into the limiting hole 441. The limiting rod 46 cooperates with the limiting hole 441 to horizontally limit the cover plate 45 and the pressing plate 44 when the pressing plate 44 and the cover plate 45 are close to or away from the connecting member 41. The limiting rod 46 cooperates with the limiting hole 441 on the pressing plate 44 to prevent the pressing plate 44 and the cover plate 45 from rotating in the horizontal direction, and plays a limiting role when the pressing plate 44 and the cover plate 45 move in the vertical direction, ensuring that the cover plate 45 and the pressing plate 44 are always located in a suitable working range, thereby ensuring the screening effect and the stability of the equipment operation. The setting of the limit rod 46 can simplify the operation process of the operator to adjust the pressure of the pressure plate 44 and the cover plate 45, and there is no need to frequently pay attention to and manually control the position of the pressure plate 44 and the cover plate 45, thereby improving the usability and work efficiency of the equipment. In order to further improve the stability of the limit rod 46 limiting the pressure plate 44 and the cover plate 45, two limit rods 46 can be provided in mirror symmetry, and two limit holes 441 on the pressure plate 44 are also provided accordingly.

[0064] See also Figure 1 and Figure 2 In some embodiments, a plurality of positioning grooves 221 are provided at intervals on the support rod 22, and the locking member 23 is engaged with the positioning grooves 221, and each positioning groove 221 corresponds to a layer of the sieve box 32, and the vertical height of each positioning groove 221 is higher than the height of the corresponding sieve box 32, so that after the connecting member 41 is connected to the locking member 23, the height of the connecting member 41 is higher than the height of the sieve box 32 corresponding to the positioning groove 221 engaged with the locking member 23. By providing the positioning grooves 221, it is convenient to accurately position the locking member 23 on the support rod 22, and the locking member 23 is engaged in the positioning grooves 221, which can ensure that the locking member 23 will not slide up and down or deviate during operation, thereby maintaining the structural stability and reliability of the entire sand screening device 100.

[0065] In some embodiments, the sum of the distance between one end of the limiting rod 46 inserted into the limiting hole 441 and the connector 41 and the thickness of the cover plate 45 is less than the distance between the topmost screen box 32 and the connector 41, and when the cover plate 45 abuts against the limiting rod 46, the cover plate 45 is separated from the topmost screen box 32. In this way, the distance that the cover plate 45 moves upward can be limited by the limiting rod 46, that is, when the cover plate 45 abuts against the limiting rod 46, the cover plate 45 can no longer move upward, and at this time, the cover plate 45 is separated from the topmost screen box 32, which is also convenient for adding materials or removing the screen box 32, and will not affect subsequent operations. By limiting the range of movement of the cover plate 45 by the limiting rod 46, it can effectively prevent the operator from rotating the handle 43 too many times when punching the cover plate 45, resulting in the need to rotate the handle 43 multiple times when installing it again, causing time waste and reducing work efficiency.

[0066] See also Figure 3 and Figure 4 In some embodiments, a limiting portion 411 is provided on the side of the connecting member 41 away from the pressing plate 44. The limiting portion 411 is arranged around the adjusting member 42. The limiting portion 411 limits the vertical movement distance of the handle 43 toward the connecting member 41, thereby limiting the vertical movement distance of the pressing plate 44 and the cover plate 45 toward the sieve box 32. The limiting portion 411 can be an annular structure, connected to the pressing plate 44 and surrounding the adjusting member 42 for limitation. When the handle 43 is rotated to move the cover plate 45 downward, the limiting portion 411 can abut the handle 43 to limit the position of the handle 43, thereby preventing the cover plate 45 from over-pressing the sieve box 32 and causing damage to the cover plate 45 or the sieve box 32.

[0067] See also Figure 3 and Figure 4 In some embodiments, the sieve box 32 further includes a partition 324, and the box wall 321, the screen 322 and the positioning member 323 are all connected to the partition 324. The partition 324 is used to improve the structural stability of the box wall 321, the screen 322 and the positioning member 323. The partition 324 can be an annular structure. The partition 324 serves as an internal support structure to increase the rigidity and strength of the sieve box 32 as a whole, making the connection between the box wall 321, the screen 322 and the positioning member 323 more solid, and reducing the risk of deformation of the sieve box 32 under vibration, heavy load or long-term use. By providing the partition 324, the assembly process of each part of the sieve box 32 can be simplified, which is convenient for mass production and maintenance and replacement.

[0068] In some embodiments, the screen 322 is detachably connected to the partition 324. Thus, when the screen 322 is damaged, the screen 322 can be removed from the partition 324 and replaced with a new screen 322, thereby effectively reducing maintenance costs.

[0069] See also Figure 3 and Figure 4In some embodiments, a docking groove 3241 is provided on one side of the partition 324 away from the box wall 321, and the horizontal cross-section of the docking groove 3241 is annular and the structure is adapted to the horizontal cross-section structure of the box wall 321. The docking groove 3241 is used to accommodate the box wall 321 of another screen box 32 to improve the sealing of the connection between the adjacent box wall 321 and the partition 324. The docking groove 3241 can fit tightly with the box wall 321 of the adjacent screen box 32 to form a nested connection mode, effectively reducing the gap between the screen boxes 32 and the screen boxes 32, thereby significantly improving the sealing performance of the connection between the adjacent screen boxes 32, preventing dust or tiny particles from overflowing from the connection gap during the screening process, ensuring a clean working environment, and reducing material loss. By providing the docking groove 3241, the two screen boxes 32 can be accurately docked and fixed, thereby enhancing the overall stability of the entire sand screening device 100, especially in the case of multi-layer stacking or continuous operation, avoiding the mutual movement or separation of the screen boxes 32 due to vibration.

[0070] In some embodiments, the mesh size (i.e., the number of holes per inch) of the screens 322 in the plurality of screen boxes 32 gradually decreases in the direction away from the bottom plate 31, so that larger particles are first screened out through the coarser screen 322, and then smaller particles are filtered out step by step through the finer screen 322. This method can efficiently separate the mixed materials step by step according to the particle size, and realize accurate graded screening.

[0071] See also Figure 1 and Figure 2 In some embodiments, a limiting seat 24 is provided on the side of the base 21 away from the vibration assembly 10, and the limiting seat 24 abuts against the outer side of the chassis 31 provided on the base 21, and the limiting seat 24 is used to limit the chassis 31. The limiting seat 24 is arranged around the chassis 31, which can prevent the chassis 31 from excessive movement or deviation during the vibration screening process, maintain the relative position between the chassis 31 and the vibration assembly 10 stable, and ensure that the entire screening process is smooth and orderly.

[0072] In one embodiment, a plurality of elastic balls (not shown) may be provided in the screen box 32. By providing the elastic balls, the continuous bouncing and collision with the sand during the vibration process can be used to effectively loosen the sand agglomerates, prevent the sieve holes from being blocked, and significantly improve the screening efficiency. In addition, the elastic balls can also reduce the accumulation of materials on the screen 322, maintain the smoothness of the screening process, and at the same time, by dispersing the impact force, play a role in protecting the screen 322, extending the service life of the screen 322, and helping to improve the uniformity and screening quality of the screened materials.

[0073] The working process of the sand screening device 100 provided in the embodiment of the present application is roughly as follows:

[0074] First, the chassis 31 is placed in the limiting seat 24 of the base 21, and then the sieve boxes 32 are stacked and installed in sequence. During installation, the mesh numbers of the sieves 322 in the multiple sieve boxes 32 need to be gradually reduced in the direction away from the chassis 31. When installing the sieve boxes 32, the positioning portion 3232 of the positioning piece 323 of the upper sieve box 32 needs to be inserted into the positioning groove 221 of the positioning piece 323 of the lower sieve box 32 to improve the stability of the connection.

[0075] After the installation of the sieve box 32 is completed, the sand to be screened is added to the top sieve box 32, and then the position of the locking member 23 on the support rod 22 is adjusted according to the overall height of the sieve box 32, so that the locking member 23 is engaged in the corresponding positioning groove 221, and then the connecting member 41 is connected to the locking member 23. After the connection is completed, the handle 43 is turned to rotate the adjustment member 42, thereby driving the pressing plate 44 and the cover plate 45 to move toward the sieve box 32 until the cover plate 45 covers the top sieve box 32. Finally, the vibration assembly 10 is turned on for vibration screening. With the vibration, the sand is screened layer by layer through the sieves 322 of different mesh sizes, and finally sand products of various levels are obtained.

[0076] It is obvious to those skilled in the art that the present application is not limited to the details of the exemplary embodiments described above, and that the present application can be implemented in other specific forms without departing from the spirit or essential features of the present application. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present application.

[0077] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application and are not intended to limit it. Although the present application has been described in detail with reference to the preferred embodiments, a person of ordinary skill in the art should understand that the technical solution of the present application may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present application.

Claims

1. A sand screening device, characterized in that: include: Vibration components; A support assembly, comprising a base, a support rod and a locking member, wherein the base is connected to the vibration assembly, the support rod is connected to a side of the base away from the vibration assembly, and the locking member is connected to the support rod; A screening assembly, comprising a chassis and a plurality of screening boxes, wherein the chassis is arranged on the base, and the plurality of screening boxes are sequentially stacked on the chassis, wherein the screening box comprises a box wall, a screen and a plurality of positioning members, wherein the screen is connected to the inner side of the box wall, and the plurality of positioning members are sequentially distributed on the outer peripheral side of the box wall, wherein a positioning hole is provided at one end of the positioning member, and a positioning portion is provided at the other end of the positioning member, and the positioning portion is inserted into the positioning hole of the positioning member on the adjacent box wall to fix the adjacent screening boxes; and A pressing assembly includes a connecting piece, an adjusting piece, a handle, a pressing plate and a cover plate, wherein the connecting piece is detachably connected to the locking piece, the adjusting piece is threadedly connected to the connecting piece, one end of the adjusting piece is connected to the handle, and the other end of the adjusting piece is provided with a spherical portion, the pressing plate and the cover plate are connected and cooperate to clamp the spherical portion so that the pressing plate and the cover plate are rotatably connected to the adjusting piece, the pressing plate is arranged on a side of the cover plate facing the connecting piece, and the cover plate is arranged on a side of the pressing plate facing away from the connecting piece, and the cover plate covers the topmost screen box.

2. The sand screening device according to claim 1, characterized in that: The pressing assembly also includes a limiting rod, which is connected to the connecting piece and arranged toward the pressing plate. The pressing plate is provided with a limiting hole corresponding to the limiting rod. One end of the limiting rod away from the connecting piece is movably inserted into the limiting hole. The limiting rod cooperates with the limiting hole to horizontally limit the cover plate and the pressing plate when the pressing plate and the cover plate are close to or away from the connecting piece.

3. The sand screening device according to claim 2, characterized in that: The support rod is provided with a plurality of positioning grooves arranged at intervals, the locking piece is engaged with the positioning grooves, each positioning groove corresponds to a layer of the screen box, and the vertical height of each positioning groove is higher than the height of the corresponding screen box, so that after the connecting piece is connected to the locking piece, the height of the connecting piece is higher than the height of the screen box corresponding to the positioning groove to which the locking piece is engaged.

4. The sand screening device according to claim 3, characterized in that: The sum of the distance between one end of the limiting rod inserted into the limiting hole and the connecting member and the thickness of the cover plate is smaller than the distance between the topmost screen box and the connecting member. When the cover plate abuts against the limiting rod, the cover plate is separated from the topmost screen box.

5. The sand screening device according to claim 1, characterized in that: A limiting portion is provided on the side of the connecting member facing away from the pressing plate, and the limiting portion is arranged around the adjusting member. The limiting portion limits the vertical movement distance of the handle toward the connecting member, thereby limiting the vertical movement distance of the pressing plate and the cover plate toward the screen box.

6. The sand screening device according to claim 1, characterized in that: The screen box further comprises a partition, and the box wall, the screen and the positioning member are all connected to the partition.

7. The sand screening device according to claim 6, characterized in that: The screen is detachably connected to the partition.

8. The sand screening device according to claim 6, characterized in that: A docking groove is provided on one side of the partition away from the box wall. The horizontal cross section of the docking groove is annular and its structure is adapted to the horizontal cross section structure of the box wall.

9. The sand screening device according to claim 1, characterized in that: The mesh numbers of the screens in the plurality of screen boxes gradually decrease in a direction away from the bottom plate.

10. The sand screening device according to claim 1, characterized in that: A limiting seat is arranged on a side of the base away from the vibration assembly, the limiting seat abuts against the outer side of the chassis arranged on the base, and the limiting seat is used to limit the chassis.

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