An efficient soil sample screening device for hydrogeological, engineering geological and environmental geological surveys

Abstract

The present invention relates to the technical field of screening, and particularly relates to an efficient soil sample screening device for hydrogeological environment investigation, which comprises a box body. The box body is divided into a pre-screening chamber, a fine-screening chamber and an aggregate chamber from top to bottom in sequence. A pre-screening mesh and a pre-screening drive are arranged in the pre-screening chamber. The pre-screening drive is used to drive the pre-screening mesh to swing left and right reciprocally with a preset amplitude. A fine-screening mesh and a vibrating screen drive are further arranged in the fine-screening chamber. The lower screening mesh is divided into a plurality of filter bodies which are distributed in sequence from left to right and have gradually decreasing mesh holes. The screening processing chamber is divided into a plurality of vibrating screen chambers by a plurality of uniformly distributed filter meshes. A plurality of vibrating screening balls are further arranged in each vibrating screen chamber, and a plurality of uniformly distributed cones are arranged on the vibrating screening balls. The vibrating screen drive is used to form a periodic oscillation with a preset amplitude for the fine-screening mesh. The structure of the present invention is compact and reasonably designed, which realizes the multi-stage efficient screening of soil samples in a relatively small space and can also achieve the purpose of cleaning the screening mesh, improving the effect of fine screening of soil samples.

Description

Technical Field

[0001] The present invention relates to the technical field of screening, and particularly relates to a high-efficiency soil sample screening device for hydrogeological, engineering geological and environmental geological surveys. Background Art

[0002] The hydrogeological, engineering geological and environmental geological specialty refers to a discipline field that conducts investigations, assessments, planning, management and protection of water body environment systems such as rivers, lakes, wetlands and oceans based on water science, combined with technology and multiple disciplinary fields. In the civil engineering operations of hydrogeological, engineering geological and environmental geological surveys, it is often necessary to screen soil samples to obtain test and detection data. However, the traditional soil sample screening equipment has a complex structure and poor use effect.

[0003] Searching the publicly available prior art "CN112577798B, a soil sample preparation table for multi-stage soil particle screening and homogenization" records that "it includes a multi-stage screening device, a soil homogenization device, and a soil sample preparation device. The multi-stage screening device includes a sieve mesh, a vibration spring, a power device, an eccentric block, a sieve soil box frame, and a sieve soil box connected to the vibration shaft. The multi-stage screening device is fixed to the sieve soil box frame through the vibration spring. The eccentric block is fixed to the vibration shaft. The power device drives the vibration shaft to drive the eccentric block to rotate. The eccentric block drives the sieve soil box to vibrate along the vibration spring. The outlet of the multi-stage screening device is connected to the feed end of the soil homogenization device, and the discharge end of the soil homogenization device is connected to the feed end of the soil sample preparation device; using this soil sample preparation table to prepare soil samples solves the problems of small volume, low fineness, difficult control of ingredient ratio, and uneven mixing of soil samples in the prior art".

[0004] However, the soil sample screening structure of the above prior art is relatively complex. Although it can achieve the purpose of multi-stage screening to a certain extent, the screening effect on soil samples is not good, the screening efficiency of soil samples with different particle sizes is low, the sieve mesh is easy to block, and the cleaning operation is relatively difficult. Summary of the Invention

[0005] In order to solve the above-mentioned disadvantages and deficiencies in the use of prior art soil sample screening, the present invention provides a high-efficiency soil sample screening device for hydrogeological, engineering geological and environmental geological surveys with a reasonable structural design, which can not only achieve multi-stage and high-efficiency screening of soil samples, but also clean the sieve mesh, and improve the fine screening effect of soil samples.

[0006] The present invention adopts the following technical solutions to achieve the above purpose:

[0007] An efficient soil sample screening device for hydrogeological and environmental surveys, comprising a box body, which is distributed on the left and right. The box body is divided into a pre-screening chamber, a fine-screening chamber, and an aggregate chamber from top to bottom in sequence. A pre-screening mesh and a pre-screening drive are arranged in the pre-screening chamber. The pre-screening meshes are distributed on the left and right. The pre-screening drive is used to drive the pre-screening mesh to sway left and right reciprocally with a preset amplitude, and can complete the periodic pushing and automatic discharging operations of the soil sample materials. In the fine-screening chamber, there are also a fine-screening mesh and a vibrating screen drive. The fine-screening mesh is mainly composed of an upper screen mesh, a lower screen mesh, and a fixing frame arranged between the two, and the enclosed area of the three forms a screening treatment chamber. The lower screen mesh is divided into multiple filter bodies distributed from left to right in sequence with gradually decreasing mesh holes. The screening treatment chamber is divided into individual vibrating screen chambers through multiple evenly distributed filter meshes, and the number of vibrating screen chambers is the same as that of the filter bodies. The mesh diameter of the filter mesh is the same as the mesh diameter of the filter body distributed on the lower left side. The mesh diameter of the upper screen mesh is smaller than that of the pre-screening mesh and larger than the mesh size of the filter body distributed on the leftmost side. In each vibrating screen chamber, there are also multiple vibrating screen balls, and multiple cones are evenly distributed on the vibrating screen balls. The vibrating screen drive is used to form a periodic oscillation with a preset amplitude for the fine-screening mesh. The aggregate chamber is divided into individual storage chambers through partitions, and the number of storage chambers is the same as that of the vibrating screen chambers. Each storage chamber is also adaptively installed with an aggregate box.

[0008] As a preferred technical solution: There is a feed inlet on one side of the top of the box body, and a feed hopper is also connected above the feed inlet. There is also a second discharge pipe on the right side wall of the box body. The input end of the second discharge pipe corresponds to the upper screen mesh, and a switch valve is also provided on the second discharge pipe.

[0009] A further preferred technical solution: There is also a feeding structure at the feed inlet. The feeding structure includes a fixing frame, a feeding auger, and a feeding motor. The fixing frame is composed of two parts distributed vertically and is fixedly installed at the feed inlet. The feeding auger is rotatably installed between the upper and lower fixing frames. The feeding motor is fixedly installed on the lower fixing frame, and the output shaft is connected to the feeding auger.

[0010] A further preferred technical solution: The pre-screening mesh includes a bottom frame, a mesh body, and side wing plates. The bottom frame is a rectangular frame structure. The mesh body is arranged on the bottom frame. There are four side wing plates, all fixedly installed on the bottom frame. The bottom frame, the mesh body, and the side wing plates enclose a soil sample treatment chamber. And there is also a diversion pipe on the left side wing plate, and a switch valve is installed on the diversion pipe. There is also a first discharge pipe at the position of the box body outside corresponding to the pre-screening chamber, and the inner diameter of the first discharge pipe is larger than the outer diameter of the diversion pipe.

[0011] Further preferred technical solution: The pre-screening drive includes a sliding column, a sliding groove, a moving arm, a shaking motor, a turntable, and a connecting shaft; the sliding column is arranged on the front and rear side wing plates, the sliding groove is arranged on the inner wall of the pre-screening cavity, and the sliding column is matched and installed with the sliding groove; the shaking motor is fixedly installed on the right side wall of the pre-screening cavity through a bracket, the turntable is coaxially arranged on the output shaft of the shaking motor, the connecting shaft is eccentrically distributed on the turntable, one end of the moving arm is hinged to the right side wing plate, and the other end is hinged to the connecting shaft.

[0012] Further preferred technical solution: The pre-screening drive further includes an electro-hydraulic push rod, a time relay, a push plate, and a brush; one end of the electro-hydraulic push rod is arranged on the right side wing plate, the time relay is arranged on the electro-hydraulic push rod, and the two are in signal connection; the push plate is fixedly installed at one end of the electro-hydraulic push rod, the brush is arranged on the lower end face of the push plate, and is kept at 1-2 cm and is in pressing contact with the mesh body.

[0013] Further preferred technical solution: There are two filters evenly distributed at intervals, and there are three vibrating screen cavities and filter bodies; and a cover plate is further provided at the lower end of each filter body, and the cover plate is also a mesh structure. In the initial state, the cover plate and the filter body are fixedly installed through a buckle.

[0014] Further preferred technical solution: The vibrating screen drive is two groups symmetrically distributed. Each group of vibrating screen drives includes a mounting seat, a compression spring, a driving motor, a driving wheel, and two sets of oscillating parts; the mounting seats are four with horizontally distributed corners, and the mounting seats are of a concave structure; two compression springs are correspondingly installed at each mounting seat, the top of the compression spring distributed on the upper side is fixedly connected to the mounting seat, and the bottom end is fixedly connected to the fixed frame by welding; the bottom end of the compression spring distributed on the lower side is fixedly connected to the mounting seat, and the top end is fixedly connected to the fixed frame by welding; the driving motor is fixedly installed in the fine screening cavity through a bracket; the driving wheel is sleeved on the output shaft of the driving motor; the oscillating part is used for performing an oscillating operation on the fixed frame.

[0015] Further preferred technical solution: The oscillating part includes a fixed shaft, a driven wheel, a vibrating screen disc, and a vibrating screen arm; the fixed shaft is rotatably installed on the side wall of the fine screening cavity, the driven wheel is sleeved on the fixed shaft, and the driving wheel is connected to the driven wheel through a belt; the vibrating screen disc is coaxially installed on the fixed shaft, and a moving groove with an elliptical structure is further provided on one side surface, the vibrating screen arms are vertically distributed, and the bottom ends are adaptively installed in the moving groove through moving blocks; an auxiliary plate is further provided on the side wall of the fine screening cavity, and the auxiliary plate is provided with a through hole for adaptively installing the vibrating screen arm, and the top end of the vibrating screen arm is always in contact with the fixed frame; and the oscillation amplitude of the vibrating screen arm in the oscillating part distributed on the left side is kept greater than the oscillation amplitude of the vibrating screen arm in the oscillating part distributed on the right side.

[0016] Further preferred technical solution: A box door is provided on one side of the box body, and a sealing strip is provided at the connection between the two; and a pressing member is further provided on the inner side wall of the box door; the pressing member includes a pressing plate and a spring; the springs are multiple and evenly distributed, and one end is fixedly connected to the box door and the other end is fixedly connected to the pressing plate; when the box door is in the closed state, the pressing plate forms a pressing and fixing operation on the aggregate box.

[0017] The beneficial effects of the present invention compared with the prior art are as follows: The structure of the present invention is compact and reasonably designed. Compared with screening equipment of the same level, the volume is reduced by about 30%. The spatial structures of the primary screening and the fine screening are optimized. Oversized granular soil samples are filtered out in the primary screening stage, avoiding resource waste phenomena in the subsequent fine screening stage; at the same time, on the basis of realizing multi-stage and efficient screening of soil samples in a smaller space, the purpose of cleaning the screen can also be achieved, avoiding the blockage and jamming of the screen holes by soil samples of different degrees of granularity, ensuring the smoothness of the screen for screening soil samples, improving the effect of fine screening of soil samples under the screen, and at the same time greatly improving the purpose of fine screening and collection of soil samples with different granularities, providing favorable conditions for the inspection and analysis of soil samples with different granularities used in subsequent hydrogeology, engineering geology and environmental geology surveys, and being more practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is a three-dimensional view of the overall structure of the present invention;

[0020] Figure 2 It is a sectional view of the overall structure of the present invention;

[0021] Figure 3 For Figure 2 The enlarged view of the structure of part A in

[0022] Figure 4 It is a three-dimensional structure diagram of the pre-screening drive of the present invention;

[0023] Figure 5 For Figure 4 The enlarged view of the structure of part B in

[0024] Figure 6 It is a connection structure diagram of the sliding column of the present invention;

[0025] Figure 7 It is a structure diagram of the fine screening mesh of the present invention;

[0026] Figure 8 This is a three-dimensional structure diagram of the oscillating part of the present invention;

[0027] Figure 9 This is a schematic structural diagram of the lower sieve mesh of the present invention;

[0028] Figure 10 This is a structural diagram of the pressing part of the present invention;

[0029] Figure 11 This is a three-dimensional view of the material conveying structure of the present invention.

[0030] In the figure: 1. Box body; 11. Pre-screening chamber; 12. Fine-screening chamber; 13. Aggregate chamber; 14. Feed inlet; 15. Feed hopper; 16. Second discharge pipe; 17. Switch valve; 18. First discharge pipe; 19. Box door; 2. Pre-screening mesh; 21. Bottom frame; 22. Mesh body; 23. Flanking plate; 24. Diversion pipe; 3. Pre-screening drive; 31. Sliding column; 32. Sliding groove; 33. Moving arm; 34. Shaking motor; 35. Turntable; 36. Connecting shaft; 37. Electric hydraulic push rod; 38. Time relay; 39. Push plate; 310. Brush; 4. Fine-screening mesh; 41. Upper sieve mesh; 42. Lower sieve mesh; 43. Fixed frame; 44. Screening treatment chamber; 45. Filter body; 451. Cover plate; 46. Filter screen; 47. Vibration sieve chamber; 48. Vibration sieve balls; 49. Cone; 5. Vibration sieve drive; 51. Mounting seat; 52. Compression spring; 53. Drive motor; 54. Driving wheel; 55. Oscillating part; 551. Fixed shaft; 552. Driven wheel; 553. Vibration sieve plate; 554. Vibration sieve arm; 555. Belt; 556. Moving groove; 557. Moving block; 558. Auxiliary plate; 6. Partition board; 7. Storage chamber; 8. Aggregate box; 9. Material conveying structure; 91. Fixed frame; 92. Material conveying auger; 93. Material conveying motor; 10. Pressing part; 101. Pressing plate; 102. Spring. Specific embodiments

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] It should be noted that in the specific embodiments of the present invention, relational terms such as "first" and "second" that may appear are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, terms such as "including", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent in such process, method, article or device. Without further limitation, a statement such as "including one" and other limiting elements does not exclude the existence of additional identical elements in the process, method, article or device including the said elements.

[0033] In the description of the present invention, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection", "provided with" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the communication inside two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood through specific circumstances.

[0034] Example 1: As Figures 1 to 9 shown:

[0035] An efficient soil sample screening device for hydrogeological and environmental geological surveys includes a box body 1, which is distributed left and right. Preferably, support legs can also be provided at the bottom of the box body 1 to improve stability. At the same time, sound-absorbing cotton can also be coated on the outer side wall of the box body 1 to reduce the noise generated by vibration. As Figure 2 shown: At one side of the top of the box body 1, a feeding port 14 is provided, and a feeding hopper 15 is also connected above the feeding port 14; with such a setting, it is convenient to carry out the feeding operation.

[0036] Referring to Figure 2 the shown structure, in this embodiment, the box body 1 is divided into a pre-screening chamber 11, a fine-screening chamber 12 and an aggregate chamber 13 from top to bottom. A pre-screening mesh 2 and a pre-screening drive 3 are arranged in the pre-screening chamber 11. Among them, the pre-screening meshes 2 are distributed left and right. In a preferred embodiment, as Figure 4As shown in the figure: The pre-screening mesh 2 includes a bottom frame 21, a mesh body 22, and side wing plates 23. The bottom frame 21 is a rectangular frame structure. The mesh body 22 is disposed on the bottom frame 21. There are four side wing plates 23, all fixedly installed on the bottom frame 21. The bottom frame 21, the mesh body 22, and the side wing plates 23 are fixedly enclosed to form a soil sample treatment chamber. The height of the side wing plates 23 is 5 - 10 cm, which is convenient for gathering the soil samples entering from the feed port 14, and then completing the first-stage primary screening operation. And a diversion pipe 24 is also provided on the left side wing plate 23. A switching valve 17 is installed on the diversion pipe 24. The switching valve 17 is connected with a control switch and can also be automatically controlled through a PLC controller. On the outer side of the box body 1 corresponding to the position of the pre-screening chamber 11, a first discharge pipe 18 is also provided. The inner diameter of the first discharge pipe 18 is larger than the outer diameter of the diversion pipe 24. With such a setting, when the soil sample material in the soil sample treatment chamber undergoes key treatment in the primary screening, the positions of the diversion pipe 24 and the first discharge pipe 18 are overlapped (that is, the position of the pre-screening mesh 2 in the initial state). At this time, the soil samples with ultra-large particle sizes filtered out in the primary screening stage will enter the discharge pipe from the diversion pipe 24, and then the centralized collection and reuse operation outside the box can be realized.

[0037] As Figure 4 and Figure 5 shown in the figure: In this embodiment, the pre-screening drive 3 is used to drive the pre-screening mesh 2 to swing left and right reciprocally with a preset amplitude, and can complete the periodic pushing and automatic discharging operations of the soil sample material. In a preferred embodiment, the pre-screening drive 3 includes a sliding column 31, a sliding groove 32, a moving arm 33, a swinging motor 34, a turntable 35, and a connecting shaft 36. As Figure 6 shown in the figure: There are two sliding columns 31 disposed on the front and rear side wing plates 23. The sliding grooves 32 are disposed on the inner wall of the pre-screening chamber 11, and the sliding columns 31 are matched and installed with the sliding grooves 32. The purpose of such a setting is to provide the moving guide and support for the swinging of the pre-screening mesh 2. The swinging motor 34 is fixedly installed on the right side wall of the pre-screening chamber 11 through a bracket. The turntable 35 is coaxially disposed on the output shaft of the swinging motor 34. The connecting shaft 36 is eccentrically disposed on the turntable 35. One end of the moving arm 33 is hinged to the right side wing plate 23, and the other end is hinged to the connecting shaft 36. With such a setting, when the soil sample treatment chamber receives the soil sample material with a preset weight, the swinging motor 34 is started, which will drive the turntable 35 to rotate synchronously, and then drive the moving arm 33 to perform a deflection movement. For the motion analysis of the pre-screening mesh 2, that is, the pre-screening mesh 2 will move left and right reciprocally with the auxiliary cooperation of the sliding columns 31 and the sliding grooves 32. In this way, the shaking screening effect on the soil sample material in the pre-screening mesh 2 is formed, and the separation and filtration effect of the soil sample material is enhanced.

[0038] In a preferred embodiment, the shaking motor 34 can also be a variable-frequency motor. Furthermore, a weight sensor is provided on the mesh body 22 of the pre-screening mesh 2 to detect the weight of the soil sample on the pre-screening mesh 2, that is, in the soil sample processing chamber, and initialize the parameters of three weight levels: low, medium, and high. The weight sensor is in signal connection with the shaking motor 34, so that after detecting parameters of different weight levels, the weight sensor transmits different control commands S1, S2, and S3, and then the shaking motor 34 can perform periodic shaking operations at different speeds. Specifically, when the weight sensor detects a relatively light low-grade soil sample material, it transmits the command S1 to the shaking motor 34, and the shaking motor 34 performs the shaking operation of the pre-screening mesh 2 at a low speed. The purpose of this setting is to achieve the initial screening shaking separation operation with automatic adjustment for different soil sample material weights, so as to achieve the purpose of reasonable resource utilization.

[0039] As Figure 4 shown: In this embodiment, the pre-screening drive 3 further includes an electro-hydraulic push rod 37, a time relay 38, a push plate 39, and a brush 310. One end of the electro-hydraulic push rod 37 is arranged on the right side wing plate 23, and the time relay 38 is arranged on the electro-hydraulic push rod 37, and the two are in signal connection. The push plate 39 is fixedly installed at one end of the electro-hydraulic push rod 37, and the brush 310 is arranged on the lower end surface of the push plate 39, and is kept at 1-2 cm and is in close contact with the mesh body 22. In the initial state, the electro-hydraulic push rod 37 is fully retracted, and the push plate 39 is close to the right-side distributed wing plate of 23. During the operation process when the shaking motor 34 is started, the electro-hydraulic push rod 37 can participate selectively. After the shaking operation of the pre-screening mesh 2 is completed, the start of the electro-hydraulic push rod 37 is mainly used to complete the unloading. The electro-hydraulic push rod 37 can also be started and stopped by connecting a control button or connecting a PLC controller. Considering the actual situation of laboratory and equipment screening, the time for the time relay 38 to control the elongation process of the electro-hydraulic push rod 37 is initialized to 30 s, the intermittent stop time is 30 s, and the contraction and reset time is 60 s. Thus, one periodic telescopic movement of the electro-hydraulic push rod 37 is 120 s.

[0040] When the electro-hydraulic push rod 37 is activated, it drives the push plate 39 from right to left, with its travel distance approaching the side wing plate 23 on the left side. Specifically, during the shaking operation activated by the shaking motor 34, the electro-hydraulic push rod 37's telescopic travel is half of its full travel distance; during the unloading operation of the pre-screen 2, the electro-hydraulic push rod 37's telescopic travel is its full travel distance. Thus, during the shaking operation activated by the shaking motor 34, the push plate 39 and the brush 310 periodically reciprocate left and right, creating a "stirring" effect on the soil sample material, preventing accumulation of soil sample material that could clog the mesh of the pre-screen 2, thereby enhancing the efficiency and separation of the soil sample material during the initial screening. During the unloading operation of the pre-screen 2, the overall left-right movement of the push plate 39 and the brush 310 creates a "pushing" effect on the soil sample material that has been filtered out during the primary screening stage, preventing the soil sample material from becoming stuck in the mesh, thereby enhancing the unloading effect of the soil sample material. At the same time, the left-right reciprocating movement of the brush 310 also cleans the mesh of the pre-screen 2, preventing mesh clogging and thereby improving the screening effect of the soil sample material. The present invention has a compact structure and a reasonable design. Compared with screening equipment of the same level, it reduces the volume by about 30%, optimizing the spatial structure of the primary and fine screening.

[0041] like Figure 2 and Figure 3 As shown: In this embodiment, a fine screen 4 and a vibrating screen drive 5 are also provided in the fine screen cavity 12; the fine screen 4 is mainly composed of an upper screen 41, a lower screen 42 and a fixed frame 43 arranged between the two, and the area enclosed by the three forms a screening processing cavity 44. Figure 7 As shown: the upper screen 41 as a whole adopts a screen structure with a uniform mesh diameter. The purpose of this setting is to clean and separate the soil sample materials with relatively large particles that meet the soil sample collection requirements. Figure 9 As shown: the lower screen 42 is divided into a plurality of filter bodies 45 which are distributed from left to right and whose mesh size gradually decreases. The screening processing chamber 44 is divided into a plurality of vibrating screen chambers 47 by a plurality of evenly distributed filter screens 46, and the number of vibrating screen chambers 47 is consistent with the filter body 45, and the mesh diameter of the filter screen 46 is consistent with the mesh diameter of the filter body 45 distributed on the lower left. The purpose of such a setting is that one vibrating screen chamber 47 is equivalent to the screening of soil sample materials of a certain particle size grade. The mesh diameter of the upper screen 41 is smaller than the mesh size of the pre-screen 2 and larger than the mesh size of the filter body 45 distributed on the far left. With such a setting, efficient screening and collection of soil sample materials can be achieved in a limited space, and space utilization is more reasonable.

[0042] like Figure 2Shown: In a preferred embodiment, there are two evenly spaced filter screens 46, and there are three vibration screening chambers 47 and three filter bodies 45 respectively; in this way, the three vibration screening chambers 47 can complete the screening of soil sample materials with three particle size grades. Coupled with the screening effects of the pre-screening mesh 2 and the upper screening mesh 41, this embodiment can achieve five-level efficient screening operation of soil sample materials in a relatively small space. For the analysis of soil sample materials with particle sizes gradually increasing as R1, R2, R3, R4, and R5 levels, the pre-screening mesh 2 mainly filters and screens out impurities and gravel with particle size level R5 and is not used for soil sample collection. The upper screening mesh 41 mainly filters and screens out soil sample collection materials with particle size level R4. The left-distributed vibration screening chamber 47 mainly filters and screens out soil sample collection materials with particle size level R3. The middle-distributed vibration screening chamber 47 mainly filters and screens out soil sample collection materials with particle size level R2. The right-distributed vibration screening chamber 47 mainly filters and screens out soil sample collection materials with particle size level R1. As Figure 3 Shown: And a cover plate 451 is also provided at the lower end of each filter body 45. The cover plate 451 is also a mesh structure. In the initial state, the cover plate 451 is fixedly installed with the filter body 45 through a buckle. The purpose of such a setting is to facilitate the staff to manually open the cover plate 451 to achieve the centralized collection operation of the screened soil sample materials after the screening operation. In a preferred embodiment, a discharge pipe can also be directly provided at the position of the filter body 45 where the cover plate 451 is provided, and a switching valve 17 is provided at the discharge pipe for automatic unloading. A second discharge pipe 16 is also provided on the right side wall of the box body 1. The input end of the second discharge pipe 16 corresponds to the upper screening mesh 41, and a switching valve 17 is also provided on the second discharge pipe 16. The purpose of such a setting is to collect soil sample materials with relatively large particles and meeting the soil sample collection requirements.

[0043] As Figure 3 Shown: In this embodiment, in order to enhance the screening and filtering effect, a plurality of vibration screening balls 48 are also provided in each vibration screening chamber 47, and a plurality of cones 49 are evenly distributed on the vibration screening balls 48; with such a setting, under the high-frequency vibration of the fine screening mesh 4, the vibration screening balls 48 will jump up and down in the corresponding vibration screening chamber 47, forming a vibration effect on the upper screening mesh 41 and the lower screening mesh 42. Moreover, the amplitudes and frequencies of different vibration screening balls 48 are also different, so the formed vibration screening effects are also different. Therefore, in a preferred embodiment, three grades of diameter sizes of vibration screening balls 48 are set in one vibration screening chamber 47 to enhance the refined vibration screening effect of the fine screening mesh 4. At the same time, the cones 49 on the vibration screening balls 48 can also, during the up-and-down jumping process, not only form a crushing and pressing effect on the soil sample materials, but also clean the phenomenon of the upper screening mesh 41 and the lower screening mesh 42 being stuck or blocked by the mesh holes, greatly improving the efficiency of soil sample material screening and having stronger practicability.

[0044] As Figure 2 And Figure 7As shown: In this embodiment, the vibrating screen drive 5 is used to form a periodic oscillation with a preset amplitude for the fine screening mesh 4. In a preferred embodiment, the vibrating screen drive 5 is provided in two symmetrically distributed groups, and each group of the vibrating screen drive 5 includes a mounting seat 51, a compression spring 52, a drive motor 53, a driving wheel 54, and two sets of oscillating members 55. Among them, there are four mounting seats 51 with horizontally distributed corners, and the mounting seat 51 has a concave structure; it is mainly used to mount the fine screening mesh 4. Two of the compression springs 52 are correspondingly mounted at each mounting seat 51. The top end of the compression spring 52 distributed on the upper side is fixedly connected to the mounting seat 51, and the bottom end is fixedly connected to the fixed frame 43 by welding; the bottom end of the compression spring 52 distributed on the lower side is fixedly connected to the mounting seat 51, and the top end is fixedly connected to the fixed frame 43 by welding; among them, the compression spring 52 has a large elasticity. With such a setting, a space for the vibration of the fine screening mesh 4 can be provided, and on the basis of the shaking and screening of the fine screening mesh 4, the vibration screening effect can be enhanced. The drive motor 53 is fixedly mounted in the fine screening cavity 12 through a bracket; the driving wheel 54 is sleeved on the output shaft of the drive motor 53.

[0045] As Figure 7 and Figure 8As shown: In a preferred embodiment, the oscillating member 55 is used to perform an oscillating operation on the fixed frame 43. Among them, the oscillating member 55 includes a fixed shaft 551, a driven wheel 552, a vibrating sieve plate 553, and a vibrating sieve arm 554. The fixed shaft 551 is rotatably installed on the side wall of the fine sieve cavity 12, and a bearing can be provided between the two to maintain the stability of rotation. The driven wheel 552 is sleeved on the fixed shaft 551, and the driving wheel 54 is connected to the driven wheel 552 through a belt 555; thus arranged, the driving wheel 54 adopts a double-groove wheel structure, and the driven wheel 552 adopts a single-groove wheel structure. Through the transmission of the belt 555, a single driving motor 53 can drive the synchronous rotation of the two fixed shafts 551 in a set of oscillating members 55. The vibrating sieve plate 553 is coaxially installed on the fixed shaft 551, and an elliptical moving groove 556 is provided on one side surface. The purpose of this setting is to form the movement of the moving block 557 along an elliptical trajectory during the rotation of the vibrating sieve plate 553. The vibrating sieve arms 554 are vertically distributed, and the bottom ends are adaptively installed in the moving groove 556 through the moving blocks 557. An auxiliary plate 558 is also provided on the side wall of the fine sieve cavity 12. The auxiliary plate 558 is provided with a through hole to adaptively install the vibrating sieve arms 554. This setting forms an auxiliary support effect on the vibrating sieve arms 554, and the vibrating sieve arms 554 can move up and down relative to the auxiliary plate 558. The top end of the vibrating sieve arm 554 always contacts the fixed frame 43; that is, in the initial state, the driving motor 53 drives the moving block 557 of the vibrating sieve arm 554 to be at the end with a smaller width of the elliptical trajectory, and at this time the vibrating sieve arm 554 contacts the fixed frame 43. Then, whether the vibrating sieve plate 553 rotates clockwise or counterclockwise, the vibrating sieve arm 554 will move upward, forming a large-amplitude vibration of the fine sieve mesh 4. In a preferred embodiment, an installation structure in which the vibrating sieve arm 554 is hinged to the fixed frame 43 can also be set. And keep the vibration amplitude of the vibrating sieve arm 554 in the oscillating member 55 distributed on the left side greater than the vibration amplitude of the vibrating sieve arm 554 in the oscillating member 55 distributed on the right side. The specific difference can be 10-20 mm, which is convenient to form an inclined distribution structure with the left side higher and the right side lower. The purpose of this setting is to form a misaligned oscillation effect, enhance the tendency of the soil sample material to slide from left to right on the fine sieve mesh 4, and facilitate the subsequent output and collection operations of the concentrated material.

[0046] Taking the left-side distribution oscillator 55 as an example for analysis: When the drive motor 53 starts, it will drive the driving wheel 54 to rotate synchronously. Under the transmission of the belt 555, it will drive the overall rotation of the two fixed shafts 551 and the driven wheel 552 distributed before and after the left-side oscillator 55. The rotation of the fixed shaft 551 will synchronously drive the rotation of the vibrating sieve plate 553. Due to the sliding and fitting installation of the moving block 557 and the moving groove 556, the moving track of the moving block 557 is an ellipse. Therefore, it will drive the vibrating sieve arm 554 to move up and down periodically, that is, to form a periodic vibration effect on the fine sieve mesh 4. On the basis of realizing multi-level and efficient screening of soil samples in a relatively small space, the purpose of cleaning the sieve mesh can also be achieved, avoiding the blockage and jamming of the sieve mesh holes by soil samples of different particle sizes, ensuring the smoothness of the sieve mesh for screening soil samples, improving the effect of fine screening of soil samples under the sieve mesh, and at the same time greatly improving the purpose of collecting soil samples with different particle sizes by fine screening, providing favorable conditions for the inspection and analysis of soil samples with different particle sizes used in subsequent hydrogeology, engineering geology and environmental geology investigations.

[0047] As Figure 2 shown: In this embodiment, the aggregate chamber 13 is divided into storage chambers 7 by the partition plate 6, and the number of storage chambers 7 is the same as the number of vibrating sieve chambers 47; each storage chamber 7 is also fitted with an aggregate box 8. The purpose of such a setting is to realize the collection operation of soil samples with different grades of particle sizes by setting the aggregate box 8.

[0048] Embodiment 2: On the basis of Embodiment 1, as Figure 2 and Figure 11 shown: A high-efficiency soil sample screening device for hydrogeology, engineering geology and environmental geology investigations further includes: a feeding structure 9 is also provided at the feeding port 14, and the feeding structure 9 includes a fixed frame 91, a feeding auger 92, and a feeding motor 93. The fixed frame 91 is composed of two parts distributed up and down, and is fixedly installed at the feeding port 14. The feeding auger 92 is rotatably installed between the two upper and lower fixed frames 91, and the feeding motor 93 is fixedly installed on the lower fixed frame 91, and the output shaft is connected to the feeding auger 92. With such a setting, when the feeding motor 93 is started, the feeding motor 93 will drive the feeding auger 92 to rotate synchronously, completing the enhanced conveying effect of the soil sample material feeding, and then improving the operation efficiency of the soil sample material conveying and screening.

[0049] Embodiment 3: On the basis of Embodiment 2, as Figure 10As shown in the figure: A high-efficiency soil sample screening device for hydrogeological and environmental investigation further includes: A box door 19 is provided on one side of the box body 1, and a sealing strip is provided at the connection between the two, so as to ensure the sealing effect. And a pressing member 10 is further provided on the inner side wall of the box door 19. In a preferred embodiment, the pressing member 10 includes a pressing plate 101 and a spring 102. The springs 102 are multiple and evenly distributed, with one end fixedly connected to the box door 19 and the other end fixedly connected to the pressing plate 101. The pressing plate 101 is preferably a cylindrical structure and is installed in a guiding manner through the side edges provided and the guiding grooves opened on the box door 19. When the box door 19 is in the closed state, the pressing plate 101 forms a pressing and fixing operation on the aggregate box 8. The purpose of such a setting is to ensure the fixation of the installation of the aggregate box 8 and avoid the displacement and sliding phenomenon caused by vibration.

[0050] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An efficient soil sample screening device for hydrogeological and environmental investigation, characterized in that: It includes a box body, which is distributed left and right. The box body is divided into a pre-screening chamber, a fine-screening chamber, and an aggregate chamber from top to bottom in sequence. A pre-screening mesh and a pre-screening drive are arranged in the pre-screening chamber. The pre-screening meshes are distributed left and right. The pre-screening drive is used to drive the pre-screening meshes to sway left and right reciprocally with a preset amplitude, and can complete the periodic pushing and automatic discharging operations of the soil sample materials. The pre-screening drive includes a sliding column, a sliding groove, a moving arm, a swaying motor, a turntable, and a connecting shaft. The sliding column is arranged on the front and rear side wing plates, the sliding groove is arranged on the inner wall of the pre-screening chamber, and the sliding column and the sliding groove are matched and installed. The swaying motor is fixedly installed on the right side wall of the pre-screening chamber through a bracket. The turntable is coaxially arranged on the output shaft of the swaying motor. The connecting shaft is eccentrically arranged on the turntable. One end of the moving arm is hinged to the right side wing plate, and the other end is hinged to the connecting shaft. The pre-screening drive further includes an electro-hydraulic push rod, a time relay, a push plate, and a brush. One end of the electro-hydraulic push rod is arranged on the right side wing plate, and the time relay is arranged on the electro-hydraulic push rod, and the two are in signal connection. The push plate is fixedly installed at one end of the electro-hydraulic push rod. The brush is arranged on the lower end face of the push plate, and is kept at 1-2 cm and is in close contact with the mesh body. A fine-screening mesh and a vibrating screen drive are also provided in the fine-screening chamber. The fine-screening mesh is mainly composed of an upper screen, a lower screen, and a fixed frame arranged between the two, and the enclosed area of the three forms a screening treatment chamber. The lower screen is divided into a plurality of filter bodies that are distributed from left to right in sequence and the mesh holes gradually decrease. The screening treatment chamber is divided into individual vibrating screen chambers through a plurality of evenly distributed filter meshes, and the number of vibrating screen chambers is the same as that of the filter bodies. The mesh hole diameter of the filter mesh is the same as the mesh hole diameter of the filter body distributed on the lower left side. The mesh hole diameter of the upper screen is smaller than that of the pre-screening mesh and larger than the mesh hole size of the leftmost distributed filter body. A plurality of vibrating screen balls are also provided in each vibrating screen chamber, and a plurality of evenly distributed cones are provided on the vibrating screen balls. The vibrating sieve drive is used to form a periodic oscillation with a preset amplitude on the fine sieve mesh; there are two sets of symmetrically distributed vibrating sieve drives, and each set of the vibrating sieve drives includes a mounting seat, a compression spring, a drive motor, a driving wheel and two sets of oscillating parts; there are four mounting seats with horizontally distributed corners, and the mounting seat is of a concave structure; two compression springs are correspondingly installed at each mounting seat, the top of the compression spring distributed on the upper side is fixedly connected to the mounting seat, and the bottom end is fixedly connected to the fixed frame by welding; the bottom end of the compression spring distributed on the lower side is fixedly connected to the mounting seat, and the top end is fixedly connected to the fixed frame by welding; the drive motor is fixedly installed in the fine sieve cavity through a bracket; the driving wheel is sleeved on the output shaft of the drive motor; the oscillating part is used to perform an oscillating operation on the fixed frame; the oscillating part includes a fixed shaft, a driven wheel, a vibrating sieve plate and a vibrating sieve arm; the fixed shaft is rotatably installed on the side wall of the fine sieve cavity, the driven wheel is sleeved on the fixed shaft, and the driving wheel is connected to the driven wheel by a belt; the vibrating sieve plate is coaxially installed on the fixed shaft, and an elliptical moving groove is also provided on one side surface, the vibrating sieve arms are vertically distributed, and the bottom ends are adaptively installed in the moving groove through moving blocks; an auxiliary plate is also provided on the side wall of the fine sieve cavity, the auxiliary plate is provided with a through hole to adaptively install the vibrating sieve arm, and the top end of the vibrating sieve arm always contacts the fixed frame; and the oscillation amplitude of the vibrating sieve arm in the oscillating part distributed on the left side is kept greater than the oscillation amplitude of the vibrating sieve arm in the oscillating part distributed on the right side; the aggregate cavity is divided into storage cavities by partitions, and the number of storage cavities is the same as the number of sieve cavities; each storage cavity is also adaptively installed with an aggregate box.

2. The high-efficiency soil sample screening device for hydrogeological, engineering geological and environmental geological surveys according to claim 1, wherein: There is a feed inlet on one side of the top of the box body, and a feed hopper is also connected above the feed inlet; there is also a second discharge pipe on the right side wall of the box body, the input end of the second discharge pipe corresponds to the upper sieve mesh, and a switch valve is also provided on the second discharge pipe.

3. The high-efficiency soil sample screening device for hydrogeological and environmental investigation according to claim 2, characterized in that: There is also a feeding structure at the feed inlet, and the feeding structure includes a fixed frame, a feeding auger and a feeding motor; there are two fixed frames distributed up and down, and they are fixedly installed at the feed inlet; the feeding auger is rotatably installed between the two upper and lower fixed frames, the feeding motor is fixedly installed on the lower fixed frame, and the output shaft is connected to the feeding auger.

4. An efficient soil sample screening device for hydrogeological, engineering geological and environmental geological surveys according to claim 3, characterized in that: The pre-sieve mesh includes a bottom frame, a mesh body and side wing plates; the bottom frame is of a rectangular frame structure, the mesh body is arranged on the bottom frame, and there are four side wing plates, all fixedly installed on the bottom frame; the bottom frame, the mesh body and the side wing plates enclose a soil sample treatment cavity; and a diversion pipe is also provided on the left side wing plate, and a switch valve is installed on the diversion pipe; a first discharge pipe is also provided on the outer side of the box body corresponding to the pre-sieve cavity, and the inner diameter of the first discharge pipe is larger than the outer diameter of the diversion pipe.

5. The high-efficiency soil sample screening device for hydrogeological, engineering geological and environmental geological surveys according to claim 4, wherein: There are two filters with evenly spaced distribution, and there are three vibrating sieve cavities and three filter bodies; and a cover plate is also provided at the lower end of each filter body, and the cover plate is also of a mesh structure. In the initial state, the cover plate is fixedly installed with the filter body through a buckle.

6. The high-efficiency soil sample screening device for hydrogeological, engineering geological and environmental geological surveys according to claim 5, wherein: One side of the box body is provided with a box door, and a sealing strip is provided at the connection between the two; and a pressing member is further provided on the inner side wall of the box door; the pressing member includes a pressing plate and a spring; the springs are multiple and evenly distributed, and one end is fixedly connected to the box door and the other end is fixedly connected to the pressing plate; when the box door is in the closed state, the pressing plate forms a pressing and fixing operation on the aggregate box.

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