Sand and gravel aggregate screening and washing device
By combining support components, vibration components, and screening components, and utilizing the gradually increasing aperture design of the filter plate, the cumbersome sand and gravel screening problem in existing technologies has been solved, achieving efficient sand and gravel screening and washing effects.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Filing Date
- 2025-07-23
- Publication Date
- 2026-07-07
AI Technical Summary
Existing sand and gravel aggregate screening equipment has a rather cumbersome screening method for sand and gravel of different sizes, requiring multiple operations.
A device comprising a support assembly, a vibration assembly, and a screening assembly was designed. By combining vibration and spraying units and utilizing the gradually increasing pore size design on the filter plate, it is possible to screen sand and gravel of different sizes in one pass.
It achieves efficient screening of sand and gravel of different sizes, simplifies the operation process, and improves screening efficiency and cleanliness.
Smart Images
Figure CN224463154U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of sand and gravel aggregate screening and washing, specifically, it relates to a sand and gravel aggregate screening and washing device. Background Technology
[0002] Sand and gravel aggregate screening and washing machines are specialized equipment used in the production process of sand and gravel aggregates (such as crushed stone and sand) for screening and washing. They are mainly used to remove impurities and improve the cleanliness and quality of aggregates to meet the material standards of construction, concrete and other projects. Most existing sand and gravel aggregate screening and washing machines screen and separate materials that do not meet the requirements in sand and gravel, thereby improving the purity of sand and gravel. However, for sand and gravel particles of different sizes, other equipment is required for further screening. This screening method of different equipment for different sizes of sand and gravel is usually quite cumbersome. Utility Model Content
[0003] To address the problem that existing screening methods for sand and gravel of different sizes are typically cumbersome, this utility model provides:
[0004] A support assembly; a vibration assembly connected to the support assembly; a screening and washing assembly including a cover unit, a spray unit, and a filter unit; the cover unit is connected to the end of the vibration assembly away from the support assembly; the spray unit is connected to the end face of the cover unit near the vibration assembly; the filter unit is connected to the vibration assembly; the filter unit is located between the vibration assembly and the cover unit; the filter unit and the spray unit are spaced apart; wherein the filter unit includes a filter plate and a plurality of filter holes; the filter holes penetrate both ends of the filter plate along its height direction; the filter plate includes a first filter section, a second filter section, and a third filter section fixedly connected in sequence along its length direction; the aperture of the filter holes gradually increases through the first filter section, the second filter section, and the third filter section.
[0005] In some embodiments, the spray unit includes a main inlet pipe, multiple branch inlet pipes, and multiple nozzles; one end of each branch inlet pipe along the axial direction is connected to the circumferential surface of the main inlet pipe; the main inlet pipe communicates with the branch inlet pipes; one end of each branch inlet pipe away from the main inlet pipe along the axial direction is closed; the nozzles are connected to the circumferential surfaces of the branch inlet pipes; the nozzles communicate with the branch inlet pipes; the circumferential surface of each branch inlet pipe is engaged with the cover unit; the main inlet pipe passes through the cover unit; and the nozzles are respectively located above the first filter section, the second filter section, and the third filter section.
[0006] In some embodiments, the aperture of the filter hole on the first filter section is k1, where 4 < k1 < 5; the aperture of the filter hole on the second filter section is k2, where 5 ≤ k2 < 15; and the aperture of the filter hole on the third filter section is k3, where 15 ≤ k3 < 32.
[0007] In some embodiments, the cover unit includes a cover body, a feed hopper, multiple buckles, and multiple retaining rings; the feed hopper is connected to the end face of the cover body away from the filter unit; the feed hopper is in communication with the cover body; the buckles are fixedly connected to the cover body along the circumference of the cover body; the retaining rings are fixedly connected to the end of the cover body away from the feed hopper; the liquid inlet main pipe passes through the cover body; the liquid inlet branch pipes are respectively snapped into the retaining rings; the buckles are connected to the vibration assembly; and the nozzle is located between the filter plate and the cover body.
[0008] In some embodiments, the vibration assembly includes a housing unit, multiple locking wrenches, and a vibration pump; the housing unit includes a housing body, a first sand discharge trough, a second sand discharge trough, a third sand discharge trough, a chip removal trough, a first sand discharge pipe, a second sand discharge pipe, a third sand discharge pipe, and a chip removal pipe; one end of the housing body along the height direction abuts against the cover body, and the other end is connected to the support assembly; the first sand discharge trough, the second sand discharge trough, the third sand discharge trough, and the chip removal trough are located inside the housing body and are spaced apart from each other by partitions; the filter plate is located inside the housing body and is detachably fixedly connected to the housing body; the first sand discharge trough is located below the first filter section; the second sand discharge trough is located below the second filter section. Below the first filter section; the third sand trough is located below the third filter section; the chip removal trough is spaced apart from the third filter section along its length; the chip removal trough is connected to the chip removal pipe; the feed hopper is located above the first filter section; the locking wrench is connected to the box body along its circumference; the locking wrench can be locked with the buckle; the fixed end of the vibration pump is connected to the box body; the first sand removal pipe, the second sand removal pipe, and the third sand removal pipe are respectively fixedly connected to the side wall of the box body; the first sand removal pipe is connected to the first sand removal trough; the second sand removal pipe is connected to the second sand removal trough; the third sand removal pipe is connected to the third sand removal trough.
[0009] In some embodiments, the housing unit further includes a mesh support; one end of the mesh support is detachably fixed to the housing body along the height direction, and the other end abuts against the end of the filter plate away from the cover body.
[0010] In some embodiments, the bottom of the first sand discharge trough, the bottom of the second sand discharge trough, and the bottom of the third sand discharge trough are inclined from one end face of the box body connected to the partition to the other end face connected to the partition towards the first sand discharge pipe, the second sand discharge pipe, and the third sand discharge pipe, respectively.
[0011] In some embodiments, the support assembly includes a support frame and a plurality of support springs; one end of the support spring along the axial direction is fixedly connected to the support frame, and the other end is fixedly connected to the box body.
[0012] To address the problem that existing screening methods for sand and gravel of different sizes are often cumbersome, this invention has the following advantages:
[0013] When screening sand and gravel, the vibration assembly is activated, and the spray unit sprays water onto the sand and gravel on the filter plate. This allows the sand and gravel to be cleaned during the vibration process. Since the filter plate includes a first filter section, a second filter section, and a third filter section that are fixedly connected along its length, and the aperture of the filter holes gradually increases from the first filter section to the second filter section and then to the third filter section, the sand and gravel can be screened from small to large as it passes through the first filter section, the second filter section, and the third filter section. This allows for the screening of sand and gravel of different sizes in one go, thus solving the problem that existing screening methods for sand and gravel of different sizes are usually quite cumbersome. Attached Figure Description
[0014] Figure 1 A schematic diagram of the plan structure of a sand and gravel aggregate screening and washing device;
[0015] Figure 2 A three-dimensional structural schematic diagram of a sand and gravel aggregate screening and washing device;
[0016] Figure 3 This is a schematic diagram of the structure of the vibration assembly in some embodiments;
[0017] Figure 4 This is a structural schematic diagram of the housing unit in some embodiments;
[0018] Figure 5 This is a schematic diagram of the spray unit in some embodiments;
[0019] Figure 6 This is a schematic diagram of the structure of the filtering unit in some embodiments;
[0020] Figure 7 for Figure 2 A magnified view of a portion of point A in the middle;
[0021] Figure 8 for Figure 5 A magnified view of a portion of point B in the middle.
[0022] In the diagram: 100 – Support assembly; 110 – Support frame; 120 – Support spring; 200 – Vibration assembly; 210 – Box unit; 211 – Box body; 212 – First row of sand troughs; 213 – Second row of sand troughs; 214 – Third row of sand troughs; 215 – Chip removal pipe; 216 – First row of sand pipes; 217 – Second row of sand pipes; 218 – Third row of sand pipes; 219 – Partition plate; 220 – Locking wrench; 230 – Mesh support; 2 40 - Vibration pump; 300 - Screening and washing assembly; 310 - Cover unit; 311 - Cover body; 312 - Feed hopper; 313 - Buckle; 314 - Snap ring; 320 - Spray unit; 321 - Main inlet pipe; 322 - Branch inlet pipe; 323 - Nozzle; 330 - Filtration unit; 331 - Filter plate; 3311 - First filtration section; 3312 - Second filtration section; 3313 - Third filtration section; 332 - Filter hole. Detailed Implementation
[0023] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present disclosure, and are not intended to imply any limitation on the scope of the disclosure.
[0024] As used herein, the term "comprising" and its variations are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "at least partially based on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment". The term "another embodiment" is to be interpreted as "at least one other embodiment". The terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments and are not intended to limit the indicated devices, elements, or components to having a specific orientation or being constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientations or positional relationships; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances. In addition, the terms "installed", "set up", "equipped with", "connected", and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, elements, or components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. Furthermore, the terms "first," "second," etc., are mainly used to distinguish different devices, elements, or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.
[0025] This embodiment discloses a sand and gravel aggregate screening and washing device, such as... Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6 As shown, it may include:
[0026] The system comprises a support assembly 100, a vibration assembly 200, and a washing assembly 300; the vibration assembly 200 is connected to the support assembly 100; the washing assembly 300 includes a cover unit 310, a spray unit 320, and a filter unit 330; the cover unit 310 is connected to the end of the vibration assembly 200 away from the support assembly 100; the spray unit 320 is connected to the end face of the cover unit 310 near the vibration assembly; the filter unit 330 is connected to the vibration assembly 200; and the filter unit 330 is located between the vibration assembly 200 and the cover unit 310. Between 0; the filter unit 330 and the spray unit 320 are arranged at intervals; wherein the filter unit 330 includes a filter plate 331 and a plurality of filter holes 332; the filter holes 332 penetrate through both ends of the filter plate 331 along the height direction of the filter plate 331; the filter plate 331 includes a first filter part 3311, a second filter part 3312, and a third filter part 3313 that are fixedly connected in sequence along its length direction; the aperture of the filter holes 332 gradually increases through the first filter part 3311, the second filter part 3312, and the third filter part 3313.
[0027] In this embodiment, when screening sand and gravel, the vibration assembly 200 is turned on, and the spray unit 320 sprays water onto the sand and gravel on the filter plate 331. This allows the sand and gravel to be cleaned during the vibration process. Since the filter plate 331 includes a first filter section 3311, a second filter section 3312, and a third filter section 3313 that are fixedly connected along the length direction in sequence, and the aperture of the filter holes 332 gradually increases through the first filter section 3311, the second filter section 3312, and the third filter section 3313, the sand and gravel can be screened from small to large as it passes through the first filter section 3311, the second filter section 3312, and the third filter section. This allows for the screening of sand and gravel of different sizes in one go, thereby solving the problem that existing screening methods for sand and gravel of different sizes are usually quite cumbersome.
[0028] In some embodiments of this utility model, such as Figure 5 , Figure 8As shown, the spray unit 320 includes a main inlet pipe 321, multiple branch inlet pipes 322, and multiple nozzles 323. One end of each branch inlet pipe 322 along the axial direction is connected to the circumferential surface of the main inlet pipe 321. The main inlet pipe 321 communicates with the branch inlet pipes 322. The end of each branch inlet pipe 322 away from the main inlet pipe 321 along the axial direction is closed. The nozzles 323 are connected to the circumferential surface of the branch inlet pipes 322. The nozzles 323 communicate with the branch inlet pipes 322. The circumferential surface of each branch inlet pipe 322 is engaged with the cover unit 310. The main inlet pipe 321 is connected to the cover unit 310. The nozzles 323 are respectively located above the first filter section 3311, the second filter section 3312, and the third filter section 3313.
[0029] In this embodiment, the main inlet pipe 321 can be connected to an external water pump, which can deliver high-pressure water to the main inlet pipe 321, and then spray it out from the nozzle 323 through the inlet branch pipe 322. In this embodiment, the vibration generated by the vibration component 200 can cause the sand and gravel on the filter plate 331 to vibrate from the first filter section 3311 through the second filter section 3312 to the third filter section 3313. Since the filter holes 332 in the first filter section 3311, the second filter section 3312, and the third filter section 3313 gradually increase in size, it is possible to filter sand and gravel of different sizes. In this embodiment, in order to make the sand and gravel move as far as possible towards the third filter section 3313 during vibration, the support component 100 can be set to be tilted at a certain angle, thereby enabling the sand and gravel to move towards the third filter section 3313 during vibration. In this embodiment, the number and position of the nozzles 323 can be set according to actual needs and are not limited to... Figure 5 The position in the middle.
[0030] In some embodiments of this utility model, the aperture of the filter hole 332 on the first filter part 3311 is k1, where 4 < k1 < 5; the aperture of the filter hole 332 on the second filter part 3312 is k2, where 5 ≤ k2 < 15; and the aperture of the filter hole 332 on the third filter part 3313 is k3, where 15 ≤ k3 < 32.
[0031] In some embodiments of this utility model, such as Figure 2As shown, the cover unit 310 includes a cover body 311, a feed hopper 312, multiple buckles 313, and multiple retaining rings 314; the feed hopper 312 is connected to the end face of the cover body 311 away from the filter unit 330; the feed hopper 312 is in communication with the cover body 311; the buckles 313 are fixedly connected to the cover body 311 along the circumference of the cover body 311; the retaining rings 314 are fixedly connected to one end of the cover body 311 away from the feed hopper 312; the liquid inlet main pipe 321 passes through the cover body 311; the liquid inlet branch pipes 322 are respectively engaged with the retaining rings 314; the buckles 313 are connected to the vibration assembly 200; the nozzle 323 is located between the filter plate 331 and the cover body 311.
[0032] In this embodiment, sand and gravel can be fed from the feed hopper 312 into the internal space of the box body 211 and first fall onto the first filter section 3311. The feed size can be set according to actual needs and is not limited to... Figure 2 The size shown.
[0033] In some embodiments of this utility model, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 7 As shown;
[0034] The vibration assembly 200 includes a housing unit 210, multiple locking wrenches, and a vibration pump 240. The housing unit 210 includes a housing body 211, a first sand discharge trough 212, a second sand discharge trough 213, a third sand discharge trough 214, a chip removal trough, a first sand discharge pipe 216, a second sand discharge pipe 217, a third sand discharge pipe 218, and a chip removal pipe 215. One end of the housing body 211 along the height direction abuts against the cover body 311, and the other end is connected to the support assembly 100. The first sand discharge trough 212, the second sand discharge trough 213, the third sand discharge trough, and the chip removal trough are located inside the housing body 211 and are spaced apart from each other by partitions 219. The filter plate 331 is located inside the housing body 211 and is detachably fixedly connected to the housing body 211. The first sand discharge trough 212 is located below the first filter section 3311. The second sand discharge trough 213 is located below the second filter section 3311. Below 12; the third sand trough 214 is located below the third filter section 3313; the chip removal trough is spaced apart from the third filter section 3313 along the length direction of the third filter section 3313; the chip removal trough is connected to the chip removal pipe 215; the feed hopper 312 is located above the first filter section 3311; the locking wrench is connected to the box body 211 along the circumference of the box body 211; the locking wrench can be locked with the buckle 313; the fixed end of the vibration pump 240 is connected to the box body 211; the first sand removal pipe 216, the second sand removal pipe 217, and the third sand removal pipe 218 are respectively fixedly connected to the side wall of the box body 211; the first sand removal pipe 216 is connected to the first sand removal trough 212; the second sand removal pipe 217 is connected to the second sand removal trough 213; the third sand removal pipe 218 is connected to the third sand removal trough 214.
[0035] In this embodiment, the cover body 311 and the box body 211 can be closed or opened by tightening the wrench. The vibration pump 240 activates the first filter section 3311, the second filter section 3312, and the third filter section 3313, causing vibrations. The sand filtered by the first filter section 3311 falls into the first sand trough 212, the sand filtered by the second filter section 3312 falls into the second sand trough 213, and the sand filtered by the third filter section 3313 enters the third sand trough 214, exiting through the first sand pipe 216, the second... The sand discharge pipe 217 and the third sand discharge pipe 218 discharge the sand, thereby achieving the separation of sand and gravel of different sizes. Those skilled in the art will know that in some cases, the sand and gravel may contain large stones, the size of which is larger than the aperture of the filter hole 332 on the third filter section 3313, which causes the stones to not fall into the third sand discharge trough 214. Therefore, by setting a chip discharge trough, larger stones can fall into the chip discharge trough and be discharged from the chip discharge pipe 215, thereby avoiding the blockage inside the box body 211 during the sand and gravel screening process.
[0036] In some embodiments of this utility model, such as Figure 4 As shown, the box unit 210 also includes a mesh support 230; one end of the mesh support 230 along the height direction is detachably fixedly connected to the box body 211, and the other end abuts against the end of the filter plate 331 away from the cover body 311.
[0037] In this embodiment, the mesh support 230 can provide a certain degree of support for the filter plate 331, thereby preventing the filter plate 331 from deforming excessively under the pressure of sand and gravel.
[0038] In some embodiments of this utility model, such as Figure 4 As shown, the bottom of the first sand discharge trough 212, the bottom of the second sand discharge trough 213, and the bottom of the third sand discharge trough are inclined from one end face of the box body 211 connected to the partition 219 to the other end face connected to the partition 219 towards the first sand discharge pipe 216, the second sand discharge pipe 217, and the third sand discharge pipe 218, respectively.
[0039] In this embodiment, by setting the bottoms of the first sand trough 212, the second sand trough 213, and the third sand trough 214 to be inclined, the sand and gravel can flow into the first sand pipe 216, the second sand pipe 217, and the third sand pipe 218 respectively under the flushing of fluid (e.g., water).
[0040] In some embodiments of this utility model, such as Figure 1 , Figure 2As shown, the support assembly 100 includes a support frame 110 and a plurality of support springs 120; one end of the support spring 120 along the axial direction is fixedly connected to the support frame 110, and the other end is fixedly connected to the box body 211.
[0041] In this embodiment, the support frame 110 can be set in a shape that is tilted at a certain angle, so that under the vibration of the vibration pump 240, the sand and gravel can slide from the first filter section 3311 through the second filter section 3312 to the third filter section 3313. By setting a spring, the box body 211 can have a large vibration amplitude during the vibration process, thereby achieving faster screening and washing of the sand and gravel. In this embodiment, the lengths of the first filter section 3311, the second filter section 3312, and the third filter section 3313 can be set according to actual needs, so as to meet the screening and washing of the sand and gravel.
[0042] The working principle of this utility model is as follows:
[0043] When it is necessary to screen and wash sand and gravel, the vibration pump 240 is turned on, the filter plate 331 vibrates, and high-pressure water is delivered to the liquid inlet manifold 321. The high-pressure water is sprayed out from the nozzle 323, and then the sand and gravel are put into the first filter section 3311 in the box body 211 from the feed hopper 312. During the vibration of the filter plate 331, the sand and gravel vibrate from the first filter section 3311 to the second filter section 3312 and then to the third filter section 3313, thereby realizing the screening and washing of sand and gravel of different sizes. The screened and washed sand and gravel fall into the first row of sand troughs 212, the second row of sand troughs 213 and the third row of sand troughs 214 respectively, and then are discharged from the first row of sand pipes 216, the second row of sand pipes 217 and the third row of sand pipes 218 respectively.
[0044] Those skilled in the art will understand that the above embodiments are specific examples of implementing this disclosure, and in practical applications, various changes can be made in form and detail without departing from the spirit and scope of this disclosure.
Claims
1. A sand and gravel aggregate washing plant, characterised in that, The utility model relates to a kind of support assembly, vibration assembly and screen washing assembly. The utility model discloses a support assembly, a vibration assembly connected with the support assembly, a screen washing assembly including cover unit, spraying unit, filter unit;The cover unit is connected with the vibration assembly away from the end of the support assembly;The spraying unit is connected with the end surface of the cover unit close to the vibration assembly;The filter unit is connected with the vibration assembly;The filter unit is located between the vibration assembly and the cover unit;The filter unit is spaced apart with the spraying unit;Wherein the filter unit includes filter plate and multiple filter holes;The filter hole penetrates the both end surfaces of the filter plate along the height direction of the filter plate;The filter plate includes first filter part, second filter part, third filter part fixedly connected in turn along its length direction;The aperture of the filter hole gradually increases through the first filter part, the second filter part, the third filter part in turn. The spraying unit includes liquid inlet main pipe, multiple liquid inlet branch pipes, multiple spray heads;The liquid inlet branch pipe is connected with the peripheral surface of the liquid inlet main pipe in axial direction one end;The liquid inlet main pipe is communicated with the liquid inlet branch pipe;The liquid inlet branch pipe is in closed state away from the liquid inlet main pipe in axial direction one end;The spray head is connected with the peripheral surface of the liquid inlet branch pipe;The spray head is communicated with the liquid inlet branch pipe;The peripheral surface of the liquid inlet branch pipe is clamped with the cover unit;The liquid inlet main pipe is connected with the cover unit;The spray head is located above the first filter part, the second filter part, the third filter part respectively. The cover unit includes cover body, feed hopper, multiple buckles, multiple clamping rings;The feed hopper is connected with the end surface of the cover body away from the filter unit;The feed hopper is communicated with the cover body;The buckle is fixedly connected with the cover body along the circumferential direction of the cover body;The clamping ring is fixedly connected with the cover body away from the feed hopper one end;The liquid inlet main pipe is connected with the cover body;The liquid inlet branch pipe is clamped with the clamping ring respectively;The buckle is connected with the vibration assembly;The spray head is located between the filter plate and the cover body.
2. A sand and gravel aggregate screening and washing plant as claimed in claim 1 wherein, 3. A sand and gravel aggregate screening and washing plant according to claim 2, wherein 4. A sand and gravel aggregate screening and washing plant according to claim 3, wherein The vibration assembly comprises a box unit, a plurality of locking wrenches and a vibration pump; the box unit comprises a box body, a first sand discharge groove, a second sand discharge groove, a third sand discharge groove, a chip discharge groove, a first sand discharge pipe, a second sand discharge pipe, a third sand discharge pipe and a chip discharge pipe; one end of the box body along the height direction abuts against the cover body, and the other end is connected with the support assembly; the first sand discharge groove, the second sand discharge groove, the third sand discharge groove and the chip discharge groove are located in the box body and are spaced apart by a partition plate; the filter plate is detachably fixedly connected with the box body; the first sand discharge groove is located below the first filter part; the second sand discharge groove is located below the second filter part; the third sand discharge groove is located below the third filter part; the chip discharge groove is spaced apart from the third filter part along the length direction of the third filter part; the chip discharge groove is in communication with the chip discharge pipe; the feeding hopper is located above the first filter part; the locking wrench is connected with the box body along the circumference of the box body; the locking wrench is lockable with the buckle; the fixed end of the vibration pump is connected with the box body; the first sand discharge pipe, the second sand discharge pipe and the third sand discharge pipe are fixedly connected with the side wall of the box body respectively; the first sand discharge pipe is in communication with the first sand discharge groove; the second sand discharge pipe is in communication with the second sand discharge groove; the third sand discharge pipe is in communication with the third sand discharge groove.
5. A sand and aggregate screening apparatus as claimed in claim 4, wherein, The box unit further comprises a mesh support; one end of the mesh support along the height direction is detachably fixedly connected with the box body, and the other end abuts against one end of the filter plate away from the cover body.
6. A sand and gravel aggregate screening and washing plant as claimed in claim 4 wherein, The bottom of the first sand discharge groove, the bottom of the second sand discharge groove and the bottom of the third sand discharge groove are respectively inclinedly arranged towards the first sand discharge pipe, the second sand discharge pipe and the third sand discharge pipe from one end surface connected with the partition plate to the other end surface connected with the partition plate of the box body.
7. A sand and aggregate washing plant according to claim 6, wherein The support assembly comprises a support frame and a plurality of support springs; one end of the support spring along the axial direction is fixedly connected with the support frame, and the other end is fixedly connected with the box body.