A sand blasting machine with filtering function

Abstract

The utility model discloses a sand spraying machine with filtering function relates to sand spraying equipment technical field. It includes the cylinder that rotates opposite frame, and the sand spraying cavity of opening front side is formed in the cylinder, and the hopper is established to the inner wall of cylinder along the rotation circumference, the filter plate spare of opposite frame fixedness is fixed in the sand spraying cavity, and the sand spraying space is below the filter plate spare. Sand material recovery channel is established to any one side of filter plate spare, and its input end is connected through the space above filter plate spare, sand material filter channel is established in the sand spraying cavity and communicates with sand material recovery channel output end, and the filter hole that communicates sand spraying cavity has at sand material filter channel bottom, and its discharge port connects the material removal channel. The sand spraying machine is through sand material recovery channel, sand material filter channel and material removal channel cooperation, realizes unqualified sand material separation, qualified sand material recovery, avoids the impurity accumulation, and need not frequent shutdown cleaning, promotes the processing efficiency and sand spraying quality, reduces the equipment loss and cost.

Description

Technical Field

[0001] This utility model relates to the field of sandblasting machine technology, and in particular to a sandblasting machine with a filtration function. Background Technology

[0002] In many industrial fields such as casting, building materials, and precision parts processing, sandblasting machines are widely used as key equipment to achieve uniform sand coating on product surfaces. They are applied in the subsequent sandblasting process after slurry application, and their operational stability and processing efficiency directly affect the surface quality of the final product and production progress. The core design concept of this type of equipment is to use a mechanical transmission structure to drive the sand circulation, thereby achieving automated sand coating of the target product and significantly reducing the inefficiencies and uneven coverage caused by manual sandblasting operations. Currently, most mainstream sand-coating machines on the market employ a rotating cylinder combined with internal hoppers to achieve the circulation and conveying of sand. The specific operating process is as follows: after the sand-coating machine starts, the drive mechanism rotates the cylinder at a uniform speed, and multiple hoppers fixedly installed inside the cylinder rotate synchronously with the cylinder. During rotation, the hoppers continuously scoop up the sand accumulated in the sand-coating chamber at the bottom of the cylinder and gradually convey the sand upwards as the cylinder rotates. When the hopper reaches a preset position above the sand-coating chamber, because the hopper's opening faces downwards, the sand it carries naturally falls downwards under gravity. To achieve refined sand coating, sand-coating machines typically have filter plates installed below the hoppers. The falling sand first passes through these filter plates, and sand that meets the particle size requirements can smoothly pass through the filter holes and accurately fall onto the surface of the product that has already undergone slurry coating treatment, thus completing the sand-coating process. However, the existing sand-washing machine's structure has revealed significant technical flaws during long-term operation, severely limiting its processing efficiency and practicality. Specifically, when sand falls through the filter plates, some impurities inevitably remain, unable to pass through the filter holes due to excessive particle size or agglomeration. In the existing sand-washing machine's design, these filtered impurities fall directly back to the bottom of the washing chamber and remix with the qualified sand to be recycled. This results in the filter plates only serving a temporary screening function, failing to truly separate and collect unqualified sand, and completely lacking a continuous and effective filtration function. As the sand washing machine continues to operate, substandard sand accumulates in the washing chamber. This leads to a gradual increase in the proportion of substandard sand in the subsequent hopper scoops, frequently clogging the filter pores of the filter plates and reducing the pass rate of qualified sand. This not only affects the uniformity of sand washing but also further reduces processing efficiency. Furthermore, the long-term mixing of accumulated substandard sand with qualified sand can cause additional wear on components such as the cylinder and hopper, shortening the equipment's lifespan. To solve this problem, operators must periodically stop the machine to manually clean the accumulated substandard sand from the washing chamber. This shutdown and cleaning process is not only labor-intensive and time-consuming but also disrupts the entire production line. Especially in large-scale continuous production scenarios, such frequent shutdowns can cause significant capacity losses and have a substantial economic impact on the company. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a sand-washing machine with a filtration function.

[0004] A sand-filtering machine with filtration function designed for this purpose includes a cylindrical body rotatably disposed relative to a frame, the cylindrical body forming a sand-filtering chamber with a front opening; hoppers arranged along the circumference of the inner wall of the cylindrical body; filter plates disposed inside the sand-filtering chamber, the filter plates being fixedly disposed relative to the frame; and a sand-filtering space formed in the sand-filtering chamber below the filter plates. A sand recovery channel is provided on either the left or right side of the filter plate; the space above the filter plate is connected to the input end of the sand recovery channel. The sand washing chamber is provided with a sand filtration channel that is connected to the output end of the sand recovery channel. The bottom of the sand filtration channel is provided with filter holes that are connected to the inside of the sand washing chamber. The outlet of the sand filtration channel is connected to a discharge channel.

[0005] Preferably, a fixing frame is provided inside the sand-washing chamber, and a plurality of first elastic elements are provided inside the fixing frame. A plurality of connecting elements connected to the first elastic elements are fixedly connected to the filter plate, and a first vibration motor is installed on the filter plate.

[0006] Preferably, a through hole is provided on the rear side of the cylinder, and a fixing rod is fixedly connected to the fixing frame. The fixing rod extends through the through hole to the outside of the cylinder and is fixedly connected to the frame. The axis of the through hole coincides with the rotation axis of the cylinder.

[0007] Preferably, a sand replenishment box and an elevator are provided on the rear side of the cylinder. The sand replenishment box has an outlet that is connected to the feed end of the elevator. The discharge end of the elevator is connected to a replenishment channel. One end of the replenishment channel passes through the through hole and extends into the sand washing chamber.

[0008] Preferably, a filter element is provided inside the sand-washing chamber, and a mesh element is detachably connected above the filter element. The filter element is fixedly disposed relative to the frame. The sand-spraying space is located between the mesh and the filter plate.

[0009] Preferably, the mesh is laid on the upper surface of the filter element.

[0010] Preferably, the mesh is connected to counterweights on the left and right sides or the front and back sides.

[0011] Preferably, a plurality of second elastic elements are connected between the filter element and the frame, and a second vibration motor is installed on the filter element.

[0012] Preferably, a dust suction hood is provided on the front side of the cylinder, a dust suction channel is formed inside the dust suction hood, a dust inlet is provided on the wall surface of the dust suction hood near the opening of the sand-spraying chamber, and a dust suction port for connecting a dust suction device is provided on the dust suction hood.

[0013] Preferably, the dust hood has a ring-shaped structure and an electric curtain is provided on the front side.

[0014] Compared with the prior art, this utility model, by setting a sand recovery channel on either the left or right side of the filter plate, allows unqualified sand that cannot pass through the filter holes above the filter plate (such as sand with excessively large particle size or agglomerated sand) to enter the channel through the input end of the sand recovery channel, avoiding the problem of unqualified sand falling directly back to the bottom of the sand washing chamber and mixing with qualified sand. In addition, with the sand filtration channel connected to the output end of the sand recovery channel, and the filter holes set at the bottom of the sand filtration channel that are connected to the inside of the sand washing chamber, the unqualified sand entering the sand filtration channel can be screened a second time. Fine qualified sand that may be mixed in can return to the sand washing chamber through the filter holes to participate in the circulating sand washing, realizing the efficient recycling and utilization of qualified sand and reducing sand waste. Finally, impurities that cannot pass through the filter holes can be discharged outside the equipment through the discharge channel connected to the outlet of the sand filtration channel, achieving complete separation of impurities and avoiding the accumulation of unqualified sand in the sand washing chamber. Secondly, it significantly improves equipment operational stability and processing efficiency, while reducing labor and time costs. Because substandard sand and impurities can be continuously discharged through the aforementioned channel structure and will not accumulate in the sand-washing chamber, there is no need for periodic shutdowns for manual cleaning as required by existing technologies. This effectively avoids the disruption to the production line caused by shutdowns, ensuring the continuous and stable operation of the sand-washing machine. It is particularly suitable for large-scale continuous production scenarios, significantly improving overall processing efficiency. Attached Figure Description

[0015] Figure 1 This is one of the three-dimensional structural schematic diagrams of this utility model; Figure 2 This is the second three-dimensional structural schematic diagram of the present invention; Figure 3 This is one of the cross-sectional structural schematic diagrams of this utility model; Figure 4 This is the third three-dimensional structural schematic diagram of the present utility model; Figure 5 This is the second cross-sectional structural schematic diagram of the present invention; Figure 6 This is the fourth three-dimensional structural schematic diagram of the present invention. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] See Figures 1-6 A sand-washing machine with a filtration function includes a cylindrical body 10 rotatably disposed relative to a frame 100, the cylindrical body 10 forming a sand-washing chamber 20 with a front opening; hoppers 110 arranged along the circumference of the inner wall of the cylindrical body 10; a filter plate 30 disposed inside the sand-washing chamber 20, the filter plate 30 being fixedly disposed relative to the frame 100; a sand-washing space formed in the sand-washing chamber 20 below the filter plate 30; a sand recovery channel 40 disposed on either the left or right side of the filter plate 30; a space above the filter plate 30 communicating with the input end of the sand recovery channel 40; a sand filtration channel 50 disposed inside the sand-washing chamber 20 communicating with the output end of the sand recovery channel 40, the bottom of the sand filtration channel 50 having filter holes 510 communicating with the interior of the sand-washing chamber 20; and a discharge channel 520 connected to the discharge port 500 of the sand filtration channel 50.

[0018] The working principle of this sand-filtering machine revolves around the process of sand circulation, grading filtration, and impurity separation. It achieves efficient and stable sand-filtering operations through the coordinated operation of its various components. The specific steps are as follows: After the equipment is started, the drive mechanism (using an existing drive mechanism) drives the cylinder 10 to rotate relative to the frame 100 in a preset direction. The hoppers 110 arranged along the rotation circumference on the inner wall of the cylinder 10 rotate synchronously with the cylinder 10. At this time, a sufficient amount of sand to be used is put into the sand-laden chamber 20, which is open at the front of the cylinder 10. The sand accumulates at the bottom of the sand-laden chamber 20 under the action of gravity. During the rotation process, the hoppers 110 will continuously scoop up the sand at the bottom and convey the sand upward along the inner wall of the sand-laden chamber 20 as the cylinder 10 rotates. When the hopper 110 carrying the sand material rotates to a position above the sand-spraying chamber 20, the opening of the hopper 110 faces the direction that meets the conditions for sand material to fall. The sand material inside falls downwards under the action of gravity and falls precisely onto the filter plate 30 fixed relative to the frame 100. The filter plate 30 then performs an initial screening of the sand material. The qualified sand material that meets the requirements for sand-spraying particle size passes smoothly through the filter holes of the filter plate 30 and falls into the sand-spraying space formed in the sand-spraying chamber 20 below it, which just covers the surface of the product that has been coated with slurry in this space, completing one sand-spraying operation. During the initial screening, unqualified sand particles that are too large or agglomerated and cannot pass through the filter plate 30 will accumulate on top of the filter plate 30. Since the filter plate 30 is relatively fixed and has a sand recovery channel 40 on either side, these unqualified sand particles will gradually move towards the input end of the sand recovery channel 40 under the pushing force of the continuously falling sand and their own gravity, and eventually enter the sand recovery channel 40. Unqualified sand is conveyed through the sand recycling channel 40 and enters the sand filtration channel 50 connected to it from its output end. The sand filtration channel 50 performs secondary fine screening on this part of the sand. Any small qualified sand particles that may be mixed in will fall back into the sand washing chamber 20 through the filter holes 510 opened at the bottom of the sand filtration channel 50, merge with the sand accumulated at the bottom, and wait to be scooped up and conveyed again by the hopper 110, so as to realize the recycling and reuse of qualified sand. Stubborn impurities and large pieces of substandard sand that still cannot pass through the filter holes 510 after secondary screening will gradually move towards the discharge port 500 within the sand filtration channel 50, and finally be discharged outside the sand washing chamber 20 through the discharge channel 520 connected to the discharge port 500. Throughout the process, all components work together continuously, ensuring continuous sand washing operations while achieving efficient filtration of sand and timely discharge of impurities, maintaining stable equipment operation without the need for shutdown.

[0019] In this invention, the filter plate 30 can be configured to be tilted towards the sand recovery channel 40 as needed. The tilt angle can be set to 1°~5°, allowing materials that cannot pass through the filter plate 30 to enter the sand recovery channel.

[0020] See Figure 2 and Figure 3The sand-washing chamber 20 is equipped with a fixing frame 320, which contains several first elastic elements 340. The filter plate 30 is fixedly connected to several connecting elements 330 that are connected to the first elastic elements 340. A first vibration motor 350 is mounted on the filter plate 30. The fixing frame 320 in the sand-washing chamber 20 provides a stable mounting base for the filter plate 30. The connecting elements 330 connect the filter plate 30 to the first elastic elements 340 (using existing springs or spring damping structures with hydraulic damping cylinders) within the fixing frame 320. Combined with the first vibration motor 350 mounted on the filter plate 30, efficient vibration screening of the filter plate 30 can be achieved. After the first vibration motor 350 is started, the vibration force is transmitted to the filter plate 30. Under the elastic support and buffering effect of the first elastic element 340, the filter plate 30 can maintain a stable and appropriate vibration frequency. On the one hand, it can accelerate the flow of sand on the filter plate 30, avoid sand accumulation and blockage of filter holes, and improve the initial screening efficiency. On the other hand, it can enhance the effect of breaking up agglomerated sand, allowing more qualified sand to pass through the filter holes, reducing the misjudgment rate of unqualified sand, and at the same time pushing unqualified sand to move quickly to the sand recovery channel 40, ensuring the smooth flow of the overall filtration process.

[0021] In this invention, a through hole 120 is provided on the rear side of the cylinder 10, and a fixing rod 101 is fixedly connected to the fixing frame 320. The fixing rod 101 extends through the through hole 120 to the outside of the cylinder 10 and is fixedly connected to the frame 100. The axis of the through hole 120 coincides with the rotation axis of the cylinder 10. In this embodiment, the fixing frame 320 is directly fixed to the frame 100 by the fixing rod 101. The stability of the frame 100 provides reliable support for the fixing frame 320, preventing the fixing frame 320 from shifting as the cylinder 10 rotates. The axis of the through hole 120 coincides with the rotation axis of the cylinder 10, so that when the cylinder 10 rotates around its own axis, the through hole 120 and the fixing rod 101 can maintain coaxial relative movement. This prevents the cylinder 10 from being hindered by the fixing rod 101 and also prevents friction and collision between the cylinder 10 and the fixing rod 101 during rotation, ensuring smooth operation of the equipment.

[0022] See Figure 5The rear side of the cylinder 10 is provided with a sand replenishment box 810 and an elevator 820. The sand replenishment box 810 has an outlet that communicates with the feed end of the elevator 820. The discharge end of the elevator 820 is connected to a replenishment channel 840, one end of which passes through the through hole 120 and extends into the sand-laden chamber 20. The core function of this embodiment is to continuously replenish sand in the sand-laden chamber 20, ensuring the sand supply for continuous operation of the sand-laden machine and avoiding operation interruption due to sand consumption. Specifically, the sand replenishment box 810 serves as a sand storage container, and its outlet stably transports sand to the feed end of the elevator 820. The elevator 820 adopts an existing belt elevator. After starting, the belt rotates and drives the lifting bucket 830 fixed on the belt. The lifting bucket 830 scoops up the sand from the feed end and transports it upward with the belt to the discharge end of the elevator 820. Subsequently, the sand extends through the replenishment channel 840 connected to the discharge end, through the through hole 120, into the sand-laden chamber 20, and accurately replenishes the bottom of the sand-laden chamber 20, merging with the original sand in the chamber.

[0023] See Figure 4 The sand-laden chamber 20 is equipped with a filter element 60, and a mesh element 70 is detachably connected above the filter element 60. The filter element 60 is fixedly installed relative to the frame 100. The sand-laden space is located between the mesh element 70 and the filter plate 30. The core function of this embodiment is to realize the recovery of excess sand and the isolation and cleaning of slurry, ensuring sand circulation and smooth operation of the equipment. From the perspective of the operation process, after the sand material completes the coating of the workpiece with slurry, the excess sand material will fall onto the surface of the mesh 70, and then pass down through the filter 60 back to the bottom of the sand coating chamber 20, reintegrating into the sand material circulation, thus avoiding the accumulation and waste of excess sand material. At the same time, the slurry dripping from the workpiece will adhere to the surface of the mesh 70. The detachable design of the mesh 70 allows workers to easily remove it from the filter 60 for cleaning, effectively preventing the slurry from solidifying and clogging the mesh, ensuring that subsequent excess sand material can pass smoothly through the mesh 70 and the filter 60, ensuring unobstructed sand material recovery channels, and avoiding the impact of mesh blockage on sand material circulation and sand coating operation efficiency.

[0024] In this invention, the mesh 70 is laid on the upper surface of the filter element 60. The mesh 70 can be connected to the filter element 60 using existing snap-fit ​​or magnetic structures.

[0025] In this invention, counterweights are connected to the left and right sides or the front and back sides of the mesh 70. The purpose of using counterweights is to enhance the stability of the mesh 70 in the front and back / left and right directions, and to prevent displacement, in conjunction with the laying of the mesh 70.

[0026] See Figure 3A plurality of second elastic elements 610 are connected between the filter element 60 and the frame 100. The second elastic elements 610 employ existing damping springs or dampers with damping cylinders. A second vibration motor is installed on the filter element 60. Specifically, one end of the second elastic element 610 is connected to the fixed frame 320, and the other end is connected to the filter element 60. The core function of this embodiment is to enhance the screening efficiency and stability of the filter element 60. After the second vibration motor is started, the vibration force is transmitted to the filter element 60. The second elastic elements 610 provide elastic support for the filter element 60, enabling it to maintain a stable and suitable vibration frequency; on the other hand, they buffer the transmitted impact of vibration on the fixed frame 320 and the frame 100, reducing component wear. This structure accelerates the flow of sand on the filter element 60, prevents sand from clogging the filter holes, ensures efficient passage of qualified sand and rapid separation of unqualified sand, further improving the overall sand processing effect of the sand washing machine.

[0027] See Figure 4 A dust collection hood 90 is provided on the front side of the cylinder 10. A dust collection channel is formed inside the dust collection hood 90. A dust inlet 910 is provided on the wall surface of the dust collection hood 90 near the opening of the sand-laden chamber 20. The dust collection hood 90 is also provided with a dust suction port 920 for connecting to a dust collection device. The core function of this embodiment is to efficiently collect dust generated during sand-laden operations, improve the working environment, and protect equipment and personnel. During the operation, fine dust is easily generated when the sand is circulated, screened, and coated within the sand-laden chamber 20. This dust diffuses outward from the front opening of the sand-laden chamber 20. At this time, the dust collection hood 90, through the dust inlet 910 near the opening wall of the sand-laden chamber 20, can accurately capture the diffused dust. After the dust is collected through the dust collection channel inside the dust collection hood 90, it is quickly extracted by an external dust collection device through the dust suction port 920. This not only prevents dust from spreading in the work area and reduces the health impact on operators, but also prevents dust from adhering to the surfaces of equipment components such as cylinder 10 and filter plates 30, reducing the risk of wear or functional impairment of components due to dust accumulation. At the same time, it reduces dust pollution to the workshop environment and provides clean and safe operating conditions for sand rinsing operations.

[0028] In this invention, the dust collection hood 90 has a ring-shaped structure and an electric curtain 1000 is provided on the front side. The electric curtain 1000 is a commercially available product. During the sandblasting process, the electric curtain 1000 can be used to close the front opening of the cylinder 10 to reduce dust from scattering to the outside.

[0029] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A sand-washing machine with a filtration function, comprising a cylindrical body (10) rotatably disposed relative to a frame (100), the cylindrical body (10) forming a sand-washing chamber (20) with a front opening; hoppers (110) arranged along the circumference of the inner wall of the cylindrical body (10); a filter plate (30) disposed inside the sand-washing chamber (20), the filter plate (30) being fixedly disposed relative to the frame (100); a sand-washing space being formed in the sand-washing chamber (20) below the filter plate (30); Its features are: A sand recovery channel (40) is provided on either the left or right side of the filter plate (30); the space above the filter plate (30) is connected to the input end of the sand recovery channel (40); The sand rinsing chamber (20) is provided with a sand filtration channel (50) that is connected to the output end of the sand recovery channel (40). The bottom of the sand filtration channel (50) is provided with a filter hole (510) that is connected to the inside of the sand rinsing chamber (20). The outlet (500) of the sand filtration channel (50) is connected to a discharge channel (520).

2. A sand-filtering machine with a filtration function according to claim 1, characterized in that: The sand-washing chamber (20) is provided with a fixed frame (320), and the fixed frame (320) is provided with a plurality of first elastic elements (340). The filter plate (30) is fixedly connected with a plurality of connecting elements (330) connected to the first elastic elements (340). The filter plate (30) is equipped with a first vibration motor (350).

3. A sand-filtering machine with a filtration function according to claim 2, characterized in that: A through hole (120) is provided on the rear side of the cylinder (10). A fixing rod (101) is fixedly connected to the fixing frame (320). The fixing rod (101) passes through the through hole (120) and extends to the outside of the cylinder (10) and is fixedly connected to the frame (100). The axis of the through hole (120) coincides with the rotation axis of the cylinder (10).

4. A sand-filtering machine with a filtration function according to claim 3, characterized in that: The rear side of the cylinder (10) is provided with a sand replenishment box (810) and a hoist (820). The sand replenishment box (810) is provided with an output port that is connected to the feed end of the hoist (820). The discharge end of the hoist (820) is connected to a replenishment channel (840). One end of the replenishment channel (840) passes through the through hole (120) and extends into the sand washing chamber (20).

5. A sand-filtering machine with a filtration function according to claim 1, characterized in that: A filter element (60) is provided inside the sand-washing chamber (20), and a mesh element (70) is detachably connected above the filter element (60). The filter element (60) is fixedly installed relative to the frame (100). The sand-spraying space is located between the mesh (70) and the filter plate (30).

6. A sand-filtering machine with a filtration function according to claim 5, characterized in that: The mesh (70) is laid on the upper surface of the filter element (60).

7. A sand-filtering machine with a filtration function according to claim 6, characterized in that: The mesh (70) is connected to counterweights on its left and right sides or front and back sides.

8. A sandblasting machine with a filtration function according to claim 5, characterized in that: A plurality of second elastic elements (610) are connected between the filter element (60) and the frame (100), and the filter element (60) is equipped with a second vibration motor.

9. A sand-filtering machine with a filtration function according to claim 1, characterized in that: A dust suction hood (90) is provided on the front side of the cylinder (10). A dust suction channel is formed inside the dust suction hood (90). A dust inlet (910) is provided on the wall surface of the dust suction hood (90) near the opening of the sand-laden chamber (20). A dust suction port (920) for connecting a dust suction device is provided on the dust suction hood (90).

10. A sandblasting machine with a filtration function according to claim 9, characterized in that: The dust hood (90) has a ring structure and an electric curtain (1000) is provided on the front side.

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