Extrusion type reverse flow type spiral sand washer

Abstract

The utility model discloses an extrusion type reverse flow type spiral sand washing machine which comprises a cleaning cylinder which is arranged in an inclined mode. The cleaning device further comprises an upper spiral blade and a lower spiral blade, the upper spiral blade and the lower spiral blade are both arranged in the cleaning cylinder, and the lower spiral blade is arranged on the lower side of the upper spiral blade. A grid section opening is formed in the cutter face penetrating through the upper spiral blade. The problems that in the prior art, sand cannot be dehydrated after being cleaned, sand discharged from a discharging port contains a large amount of water, and the quality of the sand is affected are solved. According to the extrusion type reverse flow type spiral sand washing machine, sand, especially rough sand, is extruded through the upper spiral blades at the openings of the grid sections, water in washing water mixed in the sand washing process is discharged in an extrusion and pushing mode, the washing water rapidly flows out through the openings of the grid sections, the water in the sand is reduced, and the washing quality of the sand is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of sand washing machine structure design for use in sand and gravel production lines in engineering and concrete enterprises, and particularly to an extrusion-type counter-current spiral sand washing machine. Background Technology

[0002] Sand and gravel are among the most important building materials. Due to their large usage, natural sand and gravel used in building concrete have been coarsely washed and screened manually or by traditional machinery for many years.

[0003] The applicant has developed a counter-current structure for a stone washing machine, application number CN202221073165.8, patent title: A Counter-current Stone Washing Machine. While the counter-current structure is very effective for stone washing machines, it cannot be directly applied to sand washing. This is especially true for washing raw sand, which often contains a large amount of moisture after washing, severely impacting the washing quality and posing a significant challenge in the construction industry.

[0004] In existing technologies, sand washing machines generally include spiral sand washing machines and bucket wheel sand washing machines. Neither of these types of machines has a mechanism for removing moisture from the sand. Bucket wheel sand washing machines, in particular, often store large amounts of washing water in the bucket, severely impacting the quality of the sand.

[0005] It is evident that in existing sand washing machines, the sand cannot be dehydrated after washing, resulting in a large amount of moisture in the discharged sand, which affects the quality of the sand. Utility Model Content

[0006] In view of this, the main purpose of this utility model is to provide a squeezing counter-current spiral sand washing machine that can drain water from washed sand and allow it to flow out quickly through the openings of the grate bars, thereby reducing the moisture content of the sand and improving the washing quality of the sand.

[0007] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0008] An extrusion-type counter-current spiral sand washing machine includes: a washing cylinder, the washing cylinder being inclined; and an upper spiral blade and a lower spiral blade, both the upper spiral blade and the lower spiral blade being disposed inside the washing cylinder, with the lower spiral blade disposed below the upper spiral blade.

[0009] In a preferred embodiment, the blade surface penetrating the upper helical blade has a grate opening.

[0010] In a preferred embodiment, the grate bars have multiple openings that are evenly distributed inside the upper helical blades, and each grate bar opening is arc-shaped.

[0011] In a preferred embodiment, the upper spiral blade includes a pushing side and a backing side, the grate opening extends through the pushing side and the backing side, the cross-section of the grate opening is open, and the size of the opening on the pushing side of the grate opening is smaller than the size of the opening on the backing side.

[0012] In a preferred embodiment, the central axis of the lower helical blade is hollow, so that some of the sand flows back along the hollow structure during the process of the lower helical blade pushing the sand.

[0013] In a preferred embodiment, a drive shaft is rotatably connected to the central axis of the cleaning cylinder, the drive shaft passes through the center of the hollow structure, and the drive shaft is fixedly connected to the upper spiral blade and the lower spiral blade.

[0014] In a preferred embodiment, the lower helical blade has an annular structure or a structure with multiple openings in its axial view;

[0015] In a preferred embodiment, the inner cavity of the cleaning cylinder is a cylindrical structure, and the lower spiral blade is in clearance fit with the inner wall of the cleaning cylinder;

[0016] In a preferred embodiment, the drive shaft includes a round shaft segment and a square shaft segment, with the lower end of the round shaft segment sealed and fixedly inserted into the upper end of the square shaft segment;

[0017] In a preferred embodiment, the corner of the square shaft is fixedly connected to the lower helical blade;

[0018] In a preferred embodiment, the upper helical blade is connected to the outer wall of the circular shaft section.

[0019] In a preferred embodiment, the cleaning cylinder is a sealed cylinder structure with openings at both ends, with a discharge port on the lower side of the upper end and a feed port on the upper side of the lower end.

[0020] In a preferred embodiment, a feeding device is fixedly connected to the inlet, and the feeding device is at a set height above the inlet.

[0021] In a preferred embodiment, an overflow outlet is provided between the feeding device and the feeding port, and an overflow tank is connected to the upper side of the overflow outlet, with an overflow port on the upper side of the overflow tank.

[0022] In a preferred embodiment, the cleaning cylinder has a circulating water inlet on the upper side near the inlet and a clean water inlet on the upper side near the outlet.

[0023] In a preferred embodiment, the horizontal height of the circulating water inlet is higher than the horizontal height of the overflow outlet.

[0024] In a preferred embodiment, the material further includes a material plug, which is provided at the upper end of the upper spiral blade. The material plug is constricted, with one open end facing the upper spiral blade, so that sand is squeezed out from the open end to the constricted end.

[0025] In a preferred embodiment, the width of the discharge port is the same as the inner diameter of the cleaning cylinder, the lower end of the material plug is fixed to the inner wall of the discharge port near the upper spiral blade, and the upper end of the material plug extends into the interior of the cleaning cylinder.

[0026] In a preferred embodiment, the feed plug has a plate-like structure, which forms a constricted structure with the inner wall of the cleaning cylinder;

[0027] In a preferred embodiment, the width of the feed plug is the same as the inner diameter of the cleaning cylinder;

[0028] In a preferred embodiment, a notch is provided at the middle of the upper end of the feed plug, and the size of the notch is greater than or equal to the outer diameter of the drive shaft.

[0029] The extrusion-type counter-current spiral sand washing machine of this utility model has the following beneficial effects:

[0030] This extrusion-type counter-current spiral sand washing machine includes: a washing cylinder, which is inclined; an upper spiral blade and a lower spiral blade, both located inside the washing cylinder, with the lower spiral blade positioned below the upper spiral blade; and a grate opening is formed on the blade surface penetrating the upper spiral blade.

[0031] This invention solves the problem in existing technologies where sand cannot be dehydrated after washing, resulting in sand discharged from the outlet containing a large amount of water, which affects the quality of the sand.

[0032] This extrusion-type counter-current spiral sand washing machine uses the upper spiral blades of the grate opening to compress the sand, especially raw sand. The washing water mixed in during the sand washing process is squeezed and pushed out by the extrusion, and then flows out quickly through the grate opening, reducing the moisture content of the sand and improving the washing quality of the sand. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a structural schematic diagram of an extrusion-type countercurrent spiral sand washing machine according to one embodiment of the present disclosure;

[0035] Figure 2 for Figure 1 The figure shown is a cross-sectional view of an extrusion-type counter-current spiral sand washing machine according to one embodiment of the present disclosure.

[0036] Figure 3 for Figure 1 The diagram shows the upper spiral blade structure of an extrusion-type counter-current spiral sand washing machine according to one embodiment of the present disclosure.

[0037] Figure 4 for Figure 1 The diagram shows a schematic of the lower spiral blade structure of an extrusion-type counter-current spiral sand washing machine according to one embodiment of the present disclosure.

[0038] [Explanation of Key Component Symbols]

[0039] 1. Cleaning drum;

[0040] 11. Discharge port; 12. Inlet port; 13. Circulating water inlet; 14. Clean water inlet;

[0041] 2. Upper spiral blades; 21. Grate bar openings;

[0042] 3. Lower helical blades; 31. Hollow structure;

[0043] 4. Drive shaft; 5. Feeding device;

[0044] 6. Overflow tank; 61. Overflow outlet; 62. Overflow port;

[0045] 7. Material blockage; 71. Gap;

[0046] 8. Drive motor. Detailed Implementation

[0047] The following detailed description of the extrusion-type counter-current spiral sand washing machine of the present invention, in conjunction with the accompanying drawings and embodiments, will further illustrate this invention.

[0048] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0049] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0050] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0051] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0052] like Figures 1-4 As shown, the extrusion-type counter-current spiral sand washing machine includes a washing cylinder 1 that provides a washing channel for the sand. In order to ensure the sand is pushed and conveyed, and to form a counter-current under the action of gravity to improve the washing effect, the washing cylinder 1 is inclined.

[0053] To achieve the pushing effect on the sand, the sand washing machine also includes: an upper spiral blade 2 that squeezes and pushes the sand, allowing water to be squeezed out during the washing process, ensuring the sand contains an appropriate amount of moisture and improving the washing effect; and a lower spiral blade 3 that pushes the sand to transport it from the bottom to the top, thus realizing the washing process.

[0054] Both the upper spiral blade 2 and the lower spiral blade 3 are located inside the cleaning cylinder 1, with the lower spiral blade 3 located below the upper spiral blade 2.

[0055] To ensure that water in the sand flows out more easily during the squeezing process of the upper spiral blade 2, thereby reducing the water content in the sand and improving the cleaning effect, a grate opening 21 is provided on the blade surface penetrating the upper spiral blade 2. Water flows out along the grate opening 21, improving the water flow channel. Especially in the process of washing raw sand, where the washed sand contains a large amount of water, the squeezing and rinsing by the upper spiral blade 2 squeezes out a large amount of water from the raw sand, improving the sand cleaning effect.

[0056] To improve the flow of water, multiple grate openings 21 are provided, evenly distributed inside the upper spiral blade 2, offering more channels for the water squeezed out of the sand. To match the structure of the upper spiral blade 2, more grate openings 21 can be evenly arranged, each opening being arc-shaped. This ensures smooth water flow from the sand, improves the washing effect, and maintains the appropriate moisture content in the discharged sand.

[0057] To prevent stones or sand from getting stuck in the grate opening 21 during use and clogging it, thus affecting water flow, the upper spiral blade 2 includes a pushing side (the side that pushes the sand) and a backing side (the side from which water flows out) (different names for distinguishing the two sides of the upper spiral blade 2). The grate opening 21 extends through both the pushing side and the backing side, and its cross-section is open (it can also be a trapezoidal structure, as long as the side where water flows in is smaller and the other side is larger, preventing stones or sand from getting stuck in the grate opening 21). The size of the opening on the pushing side of the grate opening 21 is smaller than the size of the opening on the backing side.

[0058] The pitch of the upper helical blade 2 is twice that of the lower helical blade 3.

[0059] Alternatively, there may be two upper helical blades 2, which are arranged in parallel on the outer wall of the drive shaft, forming a double-twisted head structure.

[0060] To improve the sand washing effect and ensure that the sand is circulated and agitated (with some sand flowing back) during the transport process propelled by the lower helical blade 3, thus enhancing the washing effect and preventing sand from clumping together during transport, the central axis of the lower helical blade 3 has a hollow structure 31. This allows some sand to flow back along the hollow structure 31 during the sand-propelling process. This improves the overall agitation effect of the sand during transport, ensuring sufficient contact with water and removing moisture from the sand, thereby enhancing the washing effect.

[0061] To facilitate the fixing of the upper spiral blades 2 and lower spiral blades 3 and ensure effective sand driving, a drive shaft 4 is fixedly connected to the central shaft of the washing cylinder 1. The drive shaft 4 passes through the center of the hollow structure 31, and its outer wall is fixedly connected to the upper spiral blades 2 and lower spiral blades 3. A drive motor 8 is connected to the end of the drive shaft 4 to provide power to the entire sand washing machine, ensuring the sand is propelled.

[0062] To ensure uniform backflow of sand during the sand-pushing process, preventing sand clumping and improving cleaning efficiency, the lower spiral blade 3 is designed with a circular structure in its axial view. This ensures that a predetermined amount of sand (passing through the hollow structure 31) flows back with each rotation of the lower spiral blade 3, guaranteeing effective cleaning.

[0063] The hollow structure 31 of the helical blade 3 can also be a structure with multiple openings, which allows for the backflow of sand. This ensures a high backflow rate during the process of the helical blade 3 propelling the sand.

[0064] To prevent sand from clumping during the pushing process, it is propelled by the lower spiral blade 3, with the sand located at the center of the lower spiral blade 3 flowing back along the hollow structure 31, thus better pushing and agitating the sand. The inner cavity of the washing cylinder 1 is a cylindrical structure, with the lower spiral blade 3 fitting tightly against the inner wall of the washing cylinder. Preferably, the gap is small, 1mm-10mm, ensuring that the sand backflow mainly follows the hollow structure. The small gap between the lower spiral blade 3 and the inner wall of the washing cylinder 1 ensures the sand is completely agitated, preventing sand accumulation between the lower spiral blade 3 and the inner wall of the washing cylinder, which would negatively impact the sand washing effect.

[0065] To ensure effective cleaning, a certain length of the lower spiral blades 3 is required to improve the mixing degree between sand and water. This necessitates a sufficiently long drive shaft 4. In one embodiment, the total length of the drive shaft is 4000mm, a length that presents significant manufacturing challenges. Therefore, this application employs a two-section shaft, which not only meets manufacturing requirements but also allows for different structural options for each section. The drive shaft 4 comprises a round shaft section and a square shaft section. The lower end of the round shaft section is sealed and fixedly inserted into the upper end of the square shaft section. That is, the square shaft end is a hollow structure, while the round shaft section is a solid shaft. The round shaft section is inserted into the end of the square shaft section and sealed by welding.

[0066] The square shaft can be selected with a square cross-section, the length of which is the same as the diameter of the lower helical blade 3. The corners of the square shaft are fixedly connected to the lower helical blade 3. This reduces the number of additional accessories, improves the overall compactness of the sand washing machine, enhances the connection strength to the lower helical blade 3, and ensures the service life of the entire sand washing machine.

[0067] The square shaft structure is only a preferred embodiment; it can also be triangular or star-shaped, with the spiral blade 3 fixedly connected at the corners of the triangle or star.

[0068] To meet varying return flow requirements, especially for larger return flow needs, when the clearance between the helical blade 3 and the drive shaft 4 is insufficient for return flow, a connecting post is used to connect the helical blade 3 and the drive shaft 4. This connecting post ensures sufficient return flow space to accommodate larger return flow requirements. In this embodiment, the square shaft can also be a cylindrical structure.

[0069] Since the upper helical blade 2 does not require reflux, but only needs to compress and push the sand, it is connected to the outer wall of the circular shaft section. The center of the upper helical blade 2 is sealed and fixed to the outer wall of the circular shaft section to ensure the strength of the fixed connection of the upper helical blade 2.

[0070] In existing technologies, the upper side of the washing cylinder 1 is an open structure. During the sand pushing process, sand is only present on one side of the lower spiral blade 3. The sand moves upward under the push of the lower spiral blade 3. Due to the open structure, only half the height of the lower spiral blade 3 contains sand, and very little sand passes over the drive shaft center, causing the sand to clump together during the pushing process, reducing the washing effect. Therefore, the washing cylinder 1 of this application is a sealed cylinder structure with openings at both ends (the two openings are the inlet 12 and the outlet 11, respectively). The entire lower spiral blade 3 is completely filled with sand, and the sand in the middle flows back along the hollow structure, improving the agitation effect on the sand. The washing cylinder 1 has an outlet 11 on the lower side of the upper end and an inlet 12 on the upper side of the lower end, satisfying the feeding and discharging of sand.

[0071] To ensure uniform and controllable feeding in coordination with the feeding equipment, a feeding device 5 is fixedly connected to the feeding port 12. The upper end of the feeding device 5 is higher than the feeding port 12 by a set height (the set height means, for example, higher than the overflow port 62, to ensure that water in the sand washing machine will not overflow from the upper end of the feeding device 5).

[0072] To enable the recycling of cleaning water within the sand washing machine, and to allow the cleaning water used to wash the sand to be discharged from the machine and filtered for further sedimentation before reuse, an overflow outlet 61 is provided between the feeding device 5 and the inlet 12. The cleaning water used to wash the sand can flow into the overflow tank 6 through the overflow outlet 61. The overflow tank 6 is connected to the upper side of the overflow outlet 61, and an overflow port 62 is provided on the upper side of the overflow tank 6. The cleaning water on the upper side can pass through the overflow port 62 for sedimentation and filtration, allowing for reuse. The overflow port 62 is located at the top to ensure a sufficient water volume within the sand washing machine, guaranteeing the cleaning effect.

[0073] Furthermore, the overflow outlet 61 has a length less than or equal to the diameter of the cleaning cylinder 1 and a width of 50mm-100mm. The size of the overflow outlet 61 should not be too large, just enough to ensure that the cleaning water overflows into the overflow tank 6, forming a certain amount of sediment inside the overflow tank 6 to prevent sand from overflowing. Especially during the washing of rough sand, the cleaning water will contain a large amount of rough sand. Through the sedimentation effect of the overflow tank 6, it can be ensured that the rough sand will not overflow with the overflow outlet 62, ensuring that the sand is not wasted.

[0074] The overflow outlet 61 is located on one side of the inlet, that is: the inlet 12 is provided on the upper side of the lower end of the washing cylinder 1, the feeding device is provided on the upper side of the inlet, and the overflow outlet 61 is provided between the feeding device and the overflow tank 6, so as to ensure that the sand that just enters the sand washing machine first comes into contact with the washing water entering the overflow tank 6. The washing water that needs to settle first carries away a large amount of mud from the newly fed sand, thus improving the washing effect.

[0075] To ensure the cleaning effect and allow for the recycling of the rinsing water after sedimentation, a circulating water inlet 13 is provided on the upper side of the rinsing cylinder 1 near the inlet 12. The circulating water inlet 13 is connected to the sedimented water in the sedimentation tank. A clean water inlet 14 is provided on the upper side of the rinsing cylinder 1 near the outlet 11. The clean water inlet 14 is connected to a tap water valve.

[0076] To ensure that the circulating water in the circulating water inlet 13 can smoothly enter the sand washing machine, the horizontal height of the circulating water inlet 13 is higher than the horizontal height of the overflow outlet 62.

[0077] To enhance the compression strength of the sand and ensure that the sand discharged from outlet 11 contains less moisture, thereby improving the sand washing quality, the sand washing machine also includes a material plug 7 to restrict sand backflow. The material plug 7 is located at the upper end of the upper spiral blade 2, and is constricted in shape, with its open end facing the upper spiral blade 2, causing the sand to be squeezed out from the open end to the constricted end. The reduced cross-sectional size of the material plug 7 further enhances the compression of the sand, ensures moisture discharge, and extends the entire sand compression stroke, thus improving the sand compression effect.

[0078] To facilitate the installation of the material plug 7 and ensure its effectiveness, the width of the discharge port 11 is the same as the inner diameter of the washing cylinder 1. The lower end of the material plug 7 is fixed to the inner wall of the discharge port 11 near the upper spiral blade 2, and the upper end of the material plug 7 extends into the washing cylinder 1. The upper end of the discharge port 11 to the drive shaft 4 has a straight-through structure to ensure the insertion and installation of the material plug 7. This also further facilitates the replacement of the material plug and provides a good bending buffer, ensuring the smooth operation of the sand washing machine.

[0079] To facilitate the manufacturing of the feed plug 7 and ensure its effectiveness, the feed plug 7 is a plate-shaped structure that forms a constricted structure with the inner wall (upper wall) of the washing cylinder 1. The lower end of the plate-shaped feed plug 7 is fixedly connected to the discharge port 11, while the upper end has a certain amount of bending space to ensure cushioning during compression, prevent sand from clogging the sand washing machine, and ensure the smooth operation of the sand washing machine.

[0080] To prevent sand from overflowing from the side of the feed plug 7, which would cause uneven sand compression at the outlet and affect the uniformity of sand washing quality, the feed plug 7 has the same width as the inner diameter of the washing cylinder 1. This prevents sand from overflowing from the side of the feed plug 7, ensuring that the sand flows out completely from the top of the feed plug 7. This achieves consistent sand compression, uniform moisture content, and guarantees the washing quality of the sand washing machine.

[0081] To ensure no interference with the drive shaft 4 and to allow sufficient space for the material plug 7 to extend upwards, thereby improving its effectiveness, a notch 71 is provided in the middle of the upper end of the material plug 7. The size of the notch 71 is greater than or equal to the outer diameter of the drive shaft 4, allowing the upper end of the material plug 7 to extend beyond the lower bottom of the drive shaft 4, thus increasing the working space of the material plug 7.

[0082] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model.

Claims

1. An extruded counter-current spiral sand washer comprising: A cleaning cylinder (1) is inclined and is characterized in that it further includes an upper spiral blade (2) and a lower spiral blade (3), both the upper spiral blade (2) and the lower spiral blade (3) are disposed inside the cleaning cylinder (1), and the lower spiral blade (3) is disposed on the lower side of the upper spiral blade (2). A grate opening (21) is provided on the blade surface that penetrates the upper helical blade (2).

2. The extrusion type reverse current spiral sand washer according to claim 1, characterized in that, The grate openings (21) are provided in multiple ways and are evenly distributed inside the upper spiral blade (2). Each grate opening (21) is arc-shaped.

3. The extrusion type reverse current spiral sand washer according to claim 1, characterized in that, The upper spiral blade (2) includes a pushing side and a backing side. The grate opening (21) extends through the pushing side and the backing side. The cross-section of the grate opening (21) is open. The size of the opening on the pushing side of the grate opening (21) is smaller than the size of the opening on the backing side.

4. The extrusion type reverse current spiral sand washer according to any one of claims 1-3, characterized in that, The lower helical blade (3) has a hollow structure (31) at its central axis, which causes some of the sand to flow back along the hollow structure (31) during the process of the lower helical blade (3) pushing the sand.

5. The extruded reverse-current spiral sand washer according to claim 4, characterized in that, The cleaning cylinder (1) is rotatably connected to a drive shaft (4) at its central axis. The drive shaft (4) passes through the center of the hollow structure (31) and is fixedly connected to the upper spiral blade (2) and the lower spiral blade (3). The lower helical blade (3) has an annular structure or multiple openings in its axial view; The inner cavity of the cleaning cylinder (1) is a cylindrical structure, and the lower spiral blade (3) is in clearance fit with the inner wall of the cleaning cylinder; The drive shaft (4) includes a round shaft section and a square shaft section, with the lower end of the round shaft section being sealed and fixedly inserted into the upper end of the square shaft section; The corner of the square shaft is fixedly connected to the lower helical blade (3); The upper helical blade (2) is connected to the outer wall of the circular shaft section.

6. A reverse-current spiral sand washer of the extrusion type according to claim 5, characterized in that, The cleaning cylinder (1) is a sealed cylinder structure with openings at both ends. The upper end of the cleaning cylinder (1) has a discharge port (11) on the lower side and the lower end of the cleaning cylinder (1) has a feed port (12) on the upper side.

7. The extruded reverse-current spiral sand washer according to claim 6, characterized in that, The feed inlet (12) is fixedly connected to a feed device (5), and the feed device (5) is set above the feed inlet (12); An overflow outlet (61) is provided between the feeding device (5) and the feeding port (12). An overflow tank (6) is connected to the upper side of the overflow outlet (61), and an overflow port (62) is provided on the upper side of the overflow tank (6).

8. The extrusion type reverse current spiral sand washer according to claim 6, characterized in that, The cleaning cylinder (1) has a circulating water inlet (13) on the upper side near the feed inlet (12) and a clean water inlet (14) on the upper side near the discharge outlet (11). The horizontal height of the circulating water inlet (13) is higher than the horizontal height of the overflow outlet (62).

9. The extruded counter-current spiral sand washer as claimed in claim 6, wherein Also includes: A material plug (7) is provided at the upper end of the upper spiral blade (2). The material plug (7) is constricted and the open end of the material plug (7) faces the upper spiral blade (2), so that the sand is squeezed out from the open end to the constricted end.

10. The extrusion type reverse current spiral sand washer according to claim 9, characterized in that, The width of the discharge port (11) is the same as the inner diameter of the cleaning cylinder (1). The lower end of the material plug (7) is fixed to the inner wall of the discharge port (11) near the upper spiral blade (2). The upper end of the material plug (7) extends into the cleaning cylinder (1). The feed plug (7) has a plate-like structure and forms a constricted structure with the inner wall of the cleaning cylinder (1); The width of the feed plug (7) is the same as the inner diameter of the cleaning cylinder (1); The feed plug (7) has a notch (71) at the middle of its upper end, and the size of the notch (71) is greater than or equal to the outer diameter of the drive shaft (4).

Images