Automatic feeding type sand spraying device and method adopting ring-scraping rain method

Abstract

The invention provides an automatic feeding type annular sand scraping rain method sanding device and method.The automatic feeding type annular sand scraping rain method sanding device comprises a model box and further comprises an automatic feeding mechanism, a sand shakeout mechanism and a lifting control mechanism, the automatic feeding mechanism comprises a sand storage box and a spiral feeding mechanism, the sand shakeout mechanism comprises a scraper and a flow equalizing plate, the flow equalizing plate is detachably connected to a supporting frame, and the lifting control mechanism is connected with the scraper. The spiral feeding mechanism and the scraper are driven by the power mechanism, a discharging port of the spiral feeding mechanism is located above the flow equalizing plate, the scraper can rotate so as to flatten sand on the surface of the flow equalizing plate, a plurality of sand shakeout holes are formed in the flow equalizing plate, and the model box is located below the flow equalizing plate. The lifting control mechanism can control the model box to ascend and descend according to the height of sand in the model box, through cooperative work of the automatic feeding mechanism and the sand shakeout mechanism, it is effectively guaranteed that the sand outflow is constant, the sand falling distance is constant through the lifting control mechanism, and therefore the problem that the compactness of a sand sample is not uniform is solved.

Description

Technical Field

[0001] This invention relates to the field of geotechnical model experiment technology, and in particular to an automatic feeding ring scraper sand rain method sand spreading device and method. Background Technology

[0002] In geotechnical model tests, the sand rain method is a commonly used foundation preparation method for saturated sand foundations. Sand is typically stored in a container above a sand-spreading device and then dispersed into the model box through multiple layers of sieves with different apertures. During this process, the density of the prepared sand sample can be adjusted by changing the sand flow rate, the sieve aperture, and the sand drop height.

[0003] However, as sand flows out of the sand reservoir, the height of the sand in the reservoir gradually decreases, leading to a gradual reduction in the sand outflow rate. If the sand outflow rate is not increased, the final sand density will be lower than the design value. Simultaneously, during the sand rain method for preparing sand samples, the continuous rise in the sand surface within the model box causes the distance the sand travels from the bottom of the sieve to the model box to continuously decrease. This change in drop distance results in a significant difference in the density of the sand sample from top to bottom within the model box. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide an automatic feeding ring scraper sand rain method sand spreading device, which can solve the problem of uneven sand sample density in the model box caused by the changes in sand flow rate and sand drop distance in the traditional sand rain method.

[0005] Therefore, the present invention adopts the following technical solution: An automatic feeding type ring scraper sand spreading device includes a model box, an automatic feeding mechanism, a sand dropping mechanism, and a lifting control mechanism. The automatic feeding mechanism includes a sand storage box and a spiral feeding mechanism. The sand dropping mechanism includes a scraper and a flow equalization plate. The flow equalization plate is detachably connected to a support frame. The spiral feeding mechanism and the scraper are driven by a power mechanism. The discharge port of the spiral feeding mechanism is located above the flow equalization plate. The scraper can rotate to smooth the sand on the surface of the flow equalization plate. The flow equalization plate is provided with several sand dropping holes. The model box is located below the flow equalization plate. The lifting control mechanism can control the lifting and lowering of the model box according to the sand height inside the model box.

[0006] Based on the above technical solutions, the present invention may also employ the following further technical solutions, or combine these further technical solutions: The sand-falling mechanism also includes several screens, which are detachably connected to the support frame and are located between the flow equalization plate and the model box.

[0007] The spiral feeding mechanism includes an impeller shaft, a feeding cylinder, a transmission rod, and blades. One end of the feeding cylinder extends into the bottom of the sand storage box, and the other end of the feeding cylinder is inclined upward and overlaps with the support frame. The feeding cylinder has a downward-sloping discharge plate on the side facing the flow equalization plate as the discharge port of the spiral feeding mechanism. The transmission rod is located inside the feeding cylinder, the impeller shaft is fixed to the upper part of the transmission rod, and the blades are spiral-shaped, with the upper end of the blades fixedly connected to the lower part of the impeller shaft.

[0008] The power mechanism includes an electric motor, a belt, a driving pulley, a driven pulley, a drive gear, a driven gear, and a driven shaft. The electric motor is fixed to the support frame. The driven shaft is fixed to the support frame via a limiting plate. The scraper is fixed to the lower end of the driven shaft. The drive shaft of the electric motor is poweredly connected to the driving pulley. The driven shaft is equipped with the driven pulley and the drive gear. The driving pulley and the driven pulley are connected by the belt. The driven gear is located at the upper end of the transmission rod. The drive gear meshes with the driven gear.

[0009] The support frame has several limiting holes on its uprights, and the flow equalization plate and the screen are detachably connected to the support frame through the limiting holes.

[0010] The flow equalization plate is provided with a baffle to prevent the scraper from scraping the sand material outside the flow equalization plate.

[0011] The flow equalization plate is provided with a plurality of evenly distributed funnel-shaped honeycomb grids, and the bottom of the honeycomb grids is provided with the sand drop holes.

[0012] The lifting control mechanism includes a lifting structure, a control center, and a fiber optic pressure gauge. The fiber optic pressure gauge is fixed to one side of the model box, the lifting structure is located at the bottom of the model box, and the control center is electrically connected to the lifting structure and the fiber optic pressure gauge.

[0013] The model box is also equipped with a graduated ruler.

[0014] Another objective of this invention is to overcome the shortcomings of the prior art and provide an operating method for an automatic feeding ring scraping sand rain method sand spreading device, which can solve the problem of uneven sand sample density in the model box caused by changes in sand flow rate and sand drop distance in the traditional sand rain method.

[0015] Therefore, the present invention adopts the following technical solution: The operation method of the automatic feeding type ring scraper sand rain method sand spreading device includes the following steps: Step 1: Set the sand drop distance between the bottom of the lowest screen and the bottom of the model box. Adjust the initial height of the model box using the lifting structure according to the set sand drop distance. Step 2: Turn on the motor. The sand in the sand storage box is continuously transported upward by the rotating blades to the top of the flow equalization plate. The continuously rotating scraper evenly smooths the sand on the flow equalization plate, so that it is evenly sprinkled onto the screen through the sand drop holes. After passing through several layers of screens, it falls into the model box. Step 3: The fiber optic pressure gauge inside the model box monitors the height of the sand in real time and transmits the height information to the control center. The control center controls the lifting structure in real time according to the set initial height to adjust the height of the model box to ensure that the sand drop distance is constant. Step 4: Observe the scale. When the sand level in the model box reaches the preset height, turn off the motor to end the sand spreading.

[0016] Compared with the prior art, the present invention has the following advantages and beneficial effects: by working together with the automatic feeding mechanism and the sand dropping mechanism, the constant sand output flow rate is effectively guaranteed, and by using the lifting control mechanism, the constant sand dropping distance is guaranteed, thereby solving the problem of uneven sand sample compaction. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 This is a side view of the support frame of the present invention.

[0019] Figure 3 This is a schematic diagram of the flow equalization plate of the present invention.

[0020] Figure 4 This is a schematic diagram of the flow equalization plate of the present invention. Detailed Implementation

[0021] To enable those skilled in the art to better understand the technical solutions of the present invention, preferred embodiments of the present invention are described below in conjunction with specific examples. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote elements with the same or similar functions throughout. However, it should be understood that the drawings are for illustrative purposes only and should not be construed as limiting the present invention. To better illustrate this embodiment, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product size. It is understandable for those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are for illustrative purposes only and should not be construed as limiting the present invention.

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0023] The automatic feeding ring scraping sand rain method sand spreading device provided by the present invention includes a model box 11, and also includes an automatic feeding mechanism, a sand dropping mechanism, and a lifting control mechanism. The automatic feeding mechanism includes a sand storage box 15 and a spiral feeding mechanism 16. The sand dropping mechanism includes a scraper 6 and a flow equalization plate 8. The flow equalization plate 8 is detachably connected to the support frame 1. The spiral feeding mechanism 16 and the scraper 6 are driven by a power mechanism. The discharge port of the spiral feeding mechanism 16 is located above the flow equalization plate 8. The scraper 6 can rotate to smooth the sand on the surface of the flow equalization plate 8. The flow equalization plate 8 is provided with several sand dropping holes. The model box 11 is located below the flow equalization plate 8. The lifting control mechanism can control the lifting and lowering of the model box 11 according to the sand height in the model box 11.

[0024] The sand removal mechanism also includes several screens 9, which are detachably connected to the support frame 1 and are located between the flow equalization plate 8 and the model box 11.

[0025] In this embodiment, the outer contours of the flow equalization plate 8 and the screen 9 are circular.

[0026] The spiral feeding mechanism 16 includes an impeller shaft 161, a feeding cylinder 162, a transmission rod 163, and blades 164. One end of the feeding cylinder 162 extends into the bottom of the sand storage box 15, and the other end of the feeding cylinder 162 is inclined upward and overlaps with the support frame 1. The feeding cylinder 162 has a downward inclined discharge plate on the side facing the flow equalization plate 8 as the discharge port of the spiral feeding mechanism 16. The transmission rod 163 is located inside the feeding cylinder 162. The impeller shaft 161 is fixed to the upper part of the transmission rod 163. The blades 164 are spiral in shape, and the upper end of the blades 164 is fixedly connected to the lower part of the impeller shaft 161.

[0027] In this embodiment, the blade 164 is welded and fixed to the transmission rod 163; the feeding cylinder 162 is an iron cylinder.

[0028] The power mechanism includes an electric motor 2, a belt 21, a driving pulley 22, a driven pulley 23, a drive gear 41, a driven gear 42, and a driven shaft 5. The electric motor 2 is fixed on the support frame 1. The driven shaft 5 is fixed to the support frame 1 through a limiting plate 3. A scraper 6 is fixed at the lower end of the driven shaft 5. The drive shaft of the electric motor 2 is poweredly connected to the driving pulley 22. The driven shaft 5 is provided with a driven pulley 23 and a drive gear 41. The driving pulley 22 and the driven pulley 23 are connected by a belt 21. The upper end of the transmission rod 163 is provided with a driven gear 42. The drive gear 41 meshes with the driven gear 42.

[0029] The support frame 1 has several limiting holes 10 on its uprights, and the flow equalization plate 8 and the screen 9 are detachably connected to the support frame 1 through the limiting holes 10.

[0030] A baffle 7 is provided on the flow equalization plate 8 to prevent the scraper 6 from scraping the sand material outside the flow equalization plate 8.

[0031] The flow equalization plate 8 is provided with several evenly distributed funnel-shaped honeycomb grids, and the bottom of the honeycomb grids is provided with sand drop holes.

[0032] Each honeycomb cell is a miniature sand storage unit, further ensuring that the sand flow rate of each sand drop hole tends to be consistent. If the sand drop hole is located on a plane, even if a scraper is used to level it, the flow rate of the sand drop hole near the discharge port may be greater than that of the far one. The design of the honeycomb cell allows the scraper to fill each honeycomb cell first, so that the sand flow rate of each sand drop hole tends to be consistent.

[0033] The lifting control mechanism includes a lifting structure 12, a control center 13, and a fiber optic pressure gauge 14. The fiber optic pressure gauge 14 is fixed to one side of the model box 11. The lifting structure 12 is located at the bottom of the model box 11. The control center 13 is electrically connected to the lifting structure 12 and the fiber optic pressure gauge 14.

[0034] The fiber optic pressure gauge 14 is used to measure the pressure of the sand inside the model box acting on the side plate of the model box, as well as the height of the sand inside the model box.

[0035] The lifting structure 12 can be an electric push rod, a lifting screw, a hydraulic lifting rod, or other structures that can achieve power lifting. In this embodiment, the lifting structure 12 adopts an electronic glue pot, which has two shells, an inner shell and an outer shell. The two shells can slide up and down relative to each other to change the height of the model box from the ground.

[0036] The model box 11 is also equipped with a scale 17.

[0037] The operating method of the automatic feeding ring scraper sand rain method sand spreading device provided by the present invention includes the following steps: Step 1: Set the sand drop distance between the bottom of the lowest screen 9 and the bottom of the model box 11. Adjust the initial height of the model box 11 using the lifting structure 12 according to the set sand drop distance. Step 2: Turn on the motor. The sand in the sand storage box 15 is continuously transported upward to the top of the flow equalization plate 8 by the rotating blades. The continuously rotating scraper 6 evenly smooths the sand on the flow equalization plate 8, so that it is evenly sprinkled onto the screen 9 through the sand drop hole. After passing through several layers of screen 9, it falls into the model box 11. Step 3: The fiber optic pressure gauge 14 inside the model box 11 monitors the height of the sand inside in real time and transmits the height information to the control center 13. The control center 13 controls the lifting structure 12 in real time according to the set initial height to adjust the height of the model box 11 to ensure that the sand drop distance is constant. Step 4: Observe the scale 17. When the sand level in the model box 11 reaches the preset height, turn off the motor and end the sand spreading.

[0038] Based on the description and accompanying drawings of this invention, those skilled in the art can easily manufacture or use the automatic feeding ring scraping sand rain method sand spreading device and method of this invention, and can produce the positive effects described in this invention.

[0039] It should be noted that the terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this invention are intended to cover non-exclusive inclusion. The terms "installed," "set," "equipped with," "connected," "linked," and "sleeve" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral construction; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two mechanisms, elements, or components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0040] In the description of this invention, it should be understood that the terms "one end," "the other end," "outer side," "inner side," "horizontal," "end," "length," "outer end," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the mechanism or element 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 invention. The terms "first" and "second" are also used only for the sake of brevity in description and do not indicate or imply relative importance.

[0041] Furthermore, in practicing the claims of this invention, those skilled in the art can understand and influence variations to the disclosed embodiments through a study of the drawings, the disclosure, and the appended claims. Additionally, in the claims and description, words such as "comprising" and "containing" do not exclude other elements or steps, and non-plural nouns do not exclude their plural forms.

[0042] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the present invention. All equivalent changes and modifications made in accordance with the present invention are covered by the scope of the claims of the present invention, and will not be listed here.

Claims

1. An automatic feeding type ring scraper sand spraying device, including a model box (11), characterized in that, It also includes an automatic feeding mechanism, a sand dropping mechanism, and a lifting control mechanism. The automatic feeding mechanism includes a sand storage box (15) and a spiral feeding mechanism (16). The sand dropping mechanism includes a scraper (6) and a flow equalization plate (8). The flow equalization plate (8) is detachably connected to the support frame (1). The spiral feeding mechanism (16) and the scraper (6) are driven by a power mechanism. The discharge port of the spiral feeding mechanism (16) is located above the flow equalization plate (8). The scraper (6) can rotate to smooth the sand on the surface of the flow equalization plate (8). The flow equalization plate (8) is provided with several sand dropping holes. The model box (11) is located below the flow equalization plate (8). The lifting control mechanism can control the lifting of the model box (11) according to the height of the sand in the model box (11).

2. The automatic feeding type ring scraper sand-spreading device as described in claim 1, characterized in that, The sand-falling mechanism also includes several screens (9), which are detachably connected to the support frame (1) and are located between the flow equalization plate (8) and the model box (11).

3. The automatic feeding type ring scraper sand-spreading device as described in claim 1, characterized in that, The spiral feeding mechanism (16) includes an impeller shaft (161), a feeding cylinder (162), a transmission rod (163), and blades (164). One end of the feeding cylinder (162) extends into the bottom of the sand storage box (15), and the other end of the feeding cylinder (162) is obliquely upward and overlaps with the support frame (1). The feeding cylinder (162) has an obliquely downward discharge plate on the side facing the flow equalization plate (8) as the discharge port of the spiral feeding mechanism (16). The transmission rod (163) is located inside the feeding cylinder (162). The impeller shaft (161) is fixed to the upper part of the transmission rod (163). The blades (164) are spiral in shape, and the upper end of the blades (164) is fixedly connected to the lower part of the impeller shaft (161).

4. The automatic feeding type ring scraper sand-spreading device as described in claim 3, characterized in that, The power mechanism includes an electric motor (2), a belt (21), a driving pulley (22), a driven pulley (23), a drive gear (41), a driven gear (42), and a driven shaft (5). The electric motor (2) is fixed on the support frame (1). The driven shaft (5) is fixed to the support frame (1) through a limiting plate (3). The scraper (6) is fixed at the lower end of the driven shaft (5). The drive shaft of the electric motor (2) is poweredly connected to the driving pulley (22). The driven shaft (5) is provided with the driven pulley (23) and the drive gear (41). The driving pulley (22) and the driven pulley (23) are connected by the belt (21). The driven gear (42) is provided at the upper end of the transmission rod (163). The drive gear (41) meshes with the driven gear (42).

5. The automatic feeding type ring scraper sand-spreading device as described in claim 2, characterized in that, The support frame (1) has several limiting holes (10) on its uprights. The flow equalization plate (8) and the screen (9) are detachably connected to the support frame (1) through the limiting holes (10).

6. The automatic feeding type ring scraper sand-spreading device as described in claim 1, characterized in that, The flow equalization plate (8) is provided with a baffle (7) to prevent the scraper (6) from scraping the sand material out of the flow equalization plate (8).

7. The automatic feeding type ring scraper sand-spreading device as described in claim 1, characterized in that, The flow equalization plate (8) is provided with a number of evenly distributed funnel-shaped honeycomb grids, and the bottom of the honeycomb grids is provided with the sand drop holes.

8. The automatic feeding type ring scraper sand-spreading device as described in claim 1, characterized in that, The lifting control mechanism includes a lifting structure (12), a control center (13), and a fiber optic pressure gauge (14). The fiber optic pressure gauge (14) is fixed to one side of the model box (11). The lifting structure (12) is located at the bottom of the model box (11). The control center (13) is electrically connected to the lifting structure (12) and the fiber optic pressure gauge (14).

9. The automatic feeding type ring scraper sand-spreading device as described in claim 1, characterized in that, The model box (11) is also equipped with a scale (17).

10. The operating method of an automatic feeding type ring scraper sand rain method sand spreading device, characterized in that, Includes the following steps: Step 1: Set the sand drop distance between the bottom of the lowest screen (9) and the bottom of the model box (11). Adjust the initial height of the model box (11) using the lifting structure (12) according to the set sand drop distance. Step 2: Turn on the motor. The sand in the sand storage box (15) is continuously transported upward by the rotating blades to the top of the flow equalization plate (8). The continuously rotating scraper (6) evenly smooths the sand on the flow equalization plate (8) so that it is evenly sprinkled onto the screen (9) through the sand drop hole. After passing through several layers of screen (9), it falls into the model box (11). Step 3: The fiber optic pressure gauge (14) inside the model box (11) monitors the height of the sand inside in real time and transmits the height information to the control center (13). The control center (13) controls the lifting structure (12) in real time according to the set initial height to adjust the height of the model box (11) to ensure that the sand drop distance is constant. Step 4: Observe the scale (17). When the sand height in the model box (11) reaches the preset height, turn off the motor and end the sand spreading.

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