Local internal circulation reverse flow type spiral sand washer

Abstract

The utility model discloses a local internal circulation reverse flow type spiral sand washer which comprises a cleaning cylinder which is arranged in an inclined mode. The sand cleaning device further comprises a spiral blade, the spiral blade is arranged in the cleaning cylinder, the center axis of the spiral blade is of a hollow structure, and part of sand flows back along the hollow structure in the process that the spiral blade pushes the sand. The problem that in the prior art, a special backflow structure is not arranged in the process that sand is driven by spiral blades is solved. The backflow effect of the sand in the pushing process is poor, the sand is prone to clustering, and the cleaning effect is poor. According to the local internal circulation reverse flow type spiral sand washer, a hollow structure is formed in the center of a spiral blade, so that a set amount of sand flows back in the sand pushing process. And in the sand pushing process of each circle of spiral blades, part of sand flows back, the sand stirring effect is improved, and then the advantage of improving the sand cleaning effect is achieved.

Description

Technical Field

[0001] This utility model relates to the technical field of sand washing machine structural design, and in particular to a local internal circulation 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. The counter-current structure is very effective for stone washing machines, but while this structure can be referenced in the sand washing process, it cannot be used directly. The washing of raw sand, in particular, has become a challenge in the construction industry.

[0004] Existing technologies include spiral sand washing machines and wheel sand washing machines;

[0005] Spiral sand washing machines can easily cause sand to clump together during the sand-pushing process, making it difficult to disperse and preventing backflow. Some sand also fails to fully contact the washing water, resulting in poor washing performance.

[0006] The bucket wheel sand washing machine can only clean the sand on the surface of the bucket wheel, while the sand at the bottom of the bucket wheel is basically unable to come into contact with the washing water, resulting in a very unsatisfactory cleaning effect.

[0007] It is evident that the two main types of sand washing machines in the existing technology have the drawback of not being able to fully contact the sand with the washing water for cleaning, resulting in poor cleaning effect. Utility Model Content

[0008] In view of this, the main purpose of this utility model is to provide a local internal circulation counter-current spiral sand washing machine that can realize partial sand backflow during the sand pushing process, improve the sand agitation effect, and thus improve the sand washing effect.

[0009] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0010] A localized internal circulation counter-current spiral sand washing machine includes: a washing cylinder, which is inclined. It also includes: spiral blades disposed inside the washing cylinder, the spiral blades having a hollow structure at their central axis, allowing some sand to flow back along the hollow structure during the process of the spiral blades pushing the sand.

[0011] 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 outer wall of the drive shaft is fixedly connected to the spiral blades.

[0012] In a preferred embodiment, the helical blade has an annular structure or a plurality of openings in its axial view.

[0013] In a preferred embodiment, the drive shaft is a square shaft, and the corners of the square shaft are fixedly connected to the helical blades.

[0014] In a preferred embodiment, the helical blades are connected to the drive shaft via a connecting post.

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

[0016] 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.

[0017] In a preferred embodiment, a feeding device is fixedly connected to the upper side of the inlet, and the upper end of the feeding device is higher than a set height of the inlet.

[0018] 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.

[0019] 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.

[0020] In a preferred embodiment, the height of the circulating water inlet is higher than the horizontal height of the overflow outlet.

[0021] In a preferred embodiment, on the opposite side of the discharge port, a drive motor is fixedly connected to the outer wall of the cleaning cylinder, and the drive motor drives the drive shaft to rotate.

[0022] The local internal circulation counter-current spiral sand washing machine of this utility model has the following beneficial effects:

[0023] This localized internal circulation counter-current spiral sand washing machine includes: a washing cylinder, which is inclined; and spiral blades, which are located inside the washing cylinder. The central axis of the spiral blades is hollow, allowing some sand to flow back along the hollow structure as the spiral blades push the sand.

[0024] This invention addresses the shortcomings of existing technologies where the lack of a dedicated reflux structure during sand-driving by spiral blades results in poor sand reflux, leading to sand clumping and ineffective cleaning.

[0025] This localized internal circulation counter-current spiral sand washing machine utilizes a hollow structure at the center of the spiral blades to allow a predetermined amount of sand to flow back during the sand-pushing process. With each rotation of the spiral blades, a portion of the sand flows back, enhancing the agitation effect and thus improving the sand-washing efficiency. Attached Figure Description

[0026] 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.

[0027] Figure 1 This is a schematic diagram of the structure of a local internal circulation counter-current spiral sand washing machine according to one embodiment of the present disclosure;

[0028] Figure 2 for Figure 1 The diagram shown is a structural schematic of a local internal circulation counter-current spiral sand washing machine according to one embodiment of the present disclosure.

[0029] Figure 3 for Figure 1 The diagram shows a schematic of the spiral blade structure of a local internal circulation counter-current spiral sand washing machine according to one embodiment of the present disclosure.

[0030] [Explanation of Key Component Symbols]

[0031] 1. Cleaning drum;

[0032] 11. Discharge port; 12. Inlet port; 13. Circulating water inlet; 14. Clean water inlet;

[0033] 3. Spiral blades; 31. Hollow structure;

[0034] 4. Drive shaft; 5. Feeding device;

[0035] 6. Overflow tank; 61. Overflow outlet; 62. Overflow port;

[0036] 8. Drive motor. Detailed Implementation

[0037] The following description, in conjunction with the accompanying drawings and embodiments of the present invention, provides a more detailed account of the local internal circulation counter-current spiral sand washing machine of the present invention.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] like Figures 1-3 The aforementioned local internal circulation counter-current spiral sand washing machine includes a washing cylinder 1 that provides a washing channel for the sand. To ensure the sand is propelled and conveyed, and to create a counter-current under gravity, thereby improving the washing effect, the washing cylinder 1 is inclined.

[0043] To facilitate the propulsion of the sand, the sand washing machine also includes spiral blades 3, which ensure the sand is transported from the bottom to the top and facilitates the washing process. The spiral blades 3 are located inside the washing cylinder 1.

[0044] To improve the sand washing effect and ensure that the sand is circulated and agitated (with some sand flowing back) during the process of being propelled by the spiral blades 3, thus enhancing the washing effect and preventing the sand from clumping together during transport, the central shaft of the spiral blades 3 has a hollow structure 31. This allows some sand to flow back along the hollow structure 31 during the process of the spiral blades 3 propelling the sand. This improves the overall agitation effect of the sand during the propelling and transporting process, ensuring full contact with water and carrying away the moisture from the sand, thereby improving the washing effect.

[0045] To facilitate the fixing of the spiral blades 3 and ensure their driving effect on the sand, a drive shaft 4 is rotatably connected to the central axis 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 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.

[0046] To ensure uniform backflow of sand during the sand-pushing process (backflow along the hollow structure 31), preventing sand clumping and improving cleaning efficiency, the 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 spiral blade 3, guaranteeing effective cleaning.

[0047] 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.

[0048] To prevent sand from clumping during the pushing process, it is propelled by the spiral blades 3, with the sand located at the center of the spiral blades 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 spiral blades 3 fitting tightly against the inner wall of the washing cylinder 1. Preferably, the gap is small, between 1mm and 10mm, ensuring that the sand flow back mainly follows the hollow structure. The small gap between the spiral blades 3 and the inner wall of the washing cylinder 1 ensures that the sand is completely agitated, preventing sand accumulation between the spiral blades 3 and the inner wall of the washing cylinder, which would negatively impact the sand washing effect.

[0049] To ensure effective cleaning, a certain length of 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.

[0050] The drive shaft 4 can be selected with a square cross-section, the length of which is the same as the diameter of the spiral blade 3. The drive shaft 4 is also a square shaft, with its corners fixedly connected to the spiral 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 spiral blade 3, and ensures the service life of the entire sand washing machine.

[0051] 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.

[0052] 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.

[0053] 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 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 spiral blade 3 is filled with sand, and very little sand rolls 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 openings at both ends are the inlet 12 and the outlet 11, respectively). The entire 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.

[0054] To ensure uniform and controllable feeding in coordination with the feeding equipment, a feeding device 5 is fixedly connected to the upper side of 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).

[0055] 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.

[0056] 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.

[0057] 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 be settled first carries away a large amount of mud from the newly fed sand, thereby improving the washing effect.

[0058] 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.

[0059] To ensure that the circulating water in the circulating water inlet 13 can smoothly enter the sand washing machine, the height of the circulating water inlet 13 is higher than the horizontal height of the overflow outlet 62.

[0060] To drive the spiral blades 3, a drive motor 8 is fixedly connected to the outer wall of the washing cylinder 1 on the opposite side of the discharge port 11. The drive motor 8 drives the drive shaft 4 to rotate.

[0061] 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. A local internal circulation counter-current spiral sand washing machine, comprising: The cleaning cylinder (1) is inclined and is characterized in that it further includes a spiral blade (3), which is disposed inside the cleaning cylinder (1). The central axis of the spiral blade (3) is a hollow structure (31), so that some sand flows back along the hollow structure (31) during the process of the spiral blade (3) pushing the sand.

2. The local internal circulation counter-current spiral sand washing machine according to claim 1, 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 spiral blade (3) on its outer wall.

3. A local internal circulation counter-current spiral sand washing machine according to claim 2, characterized in that, The spiral blade (3) has an annular structure or multiple openings in its axial view.

4. A local internal circulation counter-current spiral sand washing machine according to claim 2, characterized in that, The drive shaft (4) is a square shaft, and the corners of the square shaft are fixedly connected to the spiral blade (3).

5. A local internal circulation counter-current spiral sand washing machine according to claim 2, characterized in that, The spiral blade (3) is connected to the drive shaft (4) by a connecting column.

6. A local internal circulation counter-current spiral sand washing machine according to any one of claims 3-5, characterized in that, The inner cavity of the cleaning cylinder (1) is a cylindrical structure, and the spiral blade (3) is in clearance fit with the inner wall of the cleaning cylinder (1).

7. A local internal circulation counter-current spiral sand washing machine according to claim 6, 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.

8. A local internal circulation counter-current spiral sand washing machine according to claim 7, characterized in that, A feeding device (5) is fixedly connected to the upper side of the feeding port (12), and the upper end of the feeding device (5) is higher than the feeding port (12) by a set height; 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).

9. A local internal circulation counter-current spiral sand washing machine according to claim 7, 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 height of the circulating water inlet (13) is higher than the horizontal height of the overflow outlet (62).

10. A local internal circulation counter-current spiral sand washing machine according to claim 7, characterized in that, On the opposite side of the discharge port (11), a drive motor (8) is fixedly connected to the outer wall of the cleaning cylinder (1), and the drive motor (8) drives the drive shaft (4) to rotate.

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