Efficient soil sample screening device for hydraulic environment investigation

Abstract

The invention relates to the technical field of screening, in particular to an efficient soil sample screening device for hydraulic environment investigation, which comprises a box body, and the box body is sequentially divided into a pre-screening cavity, a fine screening cavity and a material collecting cavity from top to bottom; a pre-screening net and a pre-screening driver are arranged in the pre-screening cavity; the pre-screening drive is used for driving the pre-screening net to shake left and right in a reciprocating mode at a preset amplitude. A fine screening net and a vibrating screen driver are further arranged in the fine screening cavity; the lower screen is divided into a plurality of filtering bodies which are sequentially distributed from left to right, and meshes of the filtering bodies are gradually reduced; the interior of the screening treatment cavity is divided into a plurality of vibrating screening cavities through a plurality of uniformly distributed filter screens; a plurality of vibration screening balls are further arranged in each vibration screening cavity, and a plurality of cones which are uniformly distributed are further arranged on the vibration screening balls; and the vibrating screen drive is used for forming periodic vibration with a preset amplitude on the fine screen. The soil sample multi-stage screening device is compact in structure and reasonable in design, the purpose of cleaning the screen can be achieved on the basis that soil sample multi-stage efficient screening is achieved in a small space, and the soil sample fine screening effect is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of screening, and particularly 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 environmental systems such as rivers, lakes, wetlands and oceans based on water science, combined with technologies and multiple disciplines. 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 effects.

[0003] Searching the publicly disclosed prior art "CN112577798B, a multi-stage soil particle screening and homogenization soil sample preparation table" 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 screen mesh, a vibration spring, a power device, an eccentric block, a screen soil box frame, and a screen soil box connected to a vibration shaft. The multi-stage screening device is fixed to the screen 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 screen soil box to vibrate along the vibration spring, the outlet of the multi-stage screening device is connected to the feeding end of the soil homogenization device, and the discharging end of the soil homogenization device is connected to the feeding 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 screen mesh is easy to be blocked, 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 screen mesh, and improve the fine screening effect of soil samples.

[0006] The present invention adopts the following technical solutions to achieve the above purpose: An efficient soil sample screening device for hydrogeological and environmental surveys, comprising 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 swing left and right reciprocally with a preset amplitude, and can complete the periodic pushing and automatic discharging operations of the soil sample materials. A fine-screening mesh and a vibrating screen drive are also arranged in the fine-screening chamber. The fine-screening mesh is mainly composed of an upper screen, a lower screen and a fixing frame arranged between the two, and a screening treatment chamber is formed in the enclosed area of the three. The lower screen is divided into a plurality of filter bodies distributed in sequence from left to right with gradually decreasing mesh sizes. The screening treatment chamber is divided into individual vibrating screen chambers by 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 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 is smaller than that of the pre-screening mesh and larger than the mesh size of the filter body distributed on the leftmost side. A plurality of vibrating balls are also arranged in each vibrating screen chamber, and a plurality of evenly distributed cones are arranged on the vibrating 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 by partition plates, and the number of storage chambers is the same as that of the vibrating screen chambers. Each storage chamber is also fitted with an aggregate box.

[0007] As a preferred technical solution: a feed inlet is provided on one side of the top of the box body, and a feed hopper is also connected above the feed inlet. A second discharge pipe is also provided on the right side wall of the box body. The input end of the second discharge pipe corresponds to the upper screen, and a switch valve is also provided on the second discharge pipe.

[0008] A further preferred technical solution: a feeding structure is also provided 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 up and down and is fixedly installed at the feed inlet. The feeding auger is rotatably installed between the two 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.

[0009] 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 of which are fixedly installed on the bottom frame. The bottom frame, the mesh body and the side wing plates enclose a soil sample treatment chamber. 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-screening chamber. The inner diameter of the first discharge pipe is larger than the outer diameter of the diversion pipe.

[0010] 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 and the sliding groove are matched and installed; 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.

[0011] 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.

[0012] Further preferred technical solution: There are two filters evenly distributed at intervals, and there are three vibrating sieve cavities and filter bodies; and a cover plate is also 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.

[0013] Further preferred technical solution: The vibrating sieve drive is two groups symmetrically distributed. Each group of vibrating sieve drives includes a mounting seat, a compression spring, a drive motor, a driving wheel, and two groups of oscillating parts; the mounting seats are four with horizontally distributed corners, and the mounting seats are of 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 screening 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.

[0014] Further preferred technical solution: The oscillating part includes a fixed shaft, a driven wheel, a vibrating sieve disc, and a vibrating sieve 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 and the driven wheel are connected by a belt; the vibrating sieve disc is coaxially installed on the fixed shaft, and a moving groove with an elliptical structure is also provided on one side surface, the vibrating sieve arm is vertically distributed, and the bottom end is adaptively installed in the moving groove through a moving block; an auxiliary plate is also provided on the side wall of the fine screening cavity, and 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.

[0015] 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.

[0016] 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 structure of the primary screening and fine screening is optimized. Oversized granular soil samples are filtered out in the primary screening stage, avoiding waste of resources 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 small space, the purpose of cleaning the sieve mesh can also be achieved, avoiding blockage and jamming of the sieve mesh holes by soil samples of different degrees of granularity, 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 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 hydrogeological, engineering geological and environmental geological 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; Figure 2 It is a sectional view of the overall structure of the present invention; Figure 3 It is Figure 2 The enlarged view of the structure of part A in Figure 4 It is a three-dimensional structure diagram of the pre-screening drive of the present invention; Figure 5 It is Figure 4 The enlarged view of the structure of part B in Figure 6 It is a connection structure diagram of the sliding column of the present invention; Figure 7 It is a structure diagram of the fine screening mesh of the present invention; Figure 8 It is a three-dimensional structure diagram of the oscillating member of the present invention; Figure 9 It is a schematic structure diagram of the lower sieve mesh of the present invention; Figure 10 Structural diagram of the pressing member of the present invention; Figure 11 Stereogram of the material conveying structure of the present invention.

[0020] 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 screening mesh; 42. Lower screening mesh; 43. Fixed frame; 44. Screening treatment chamber; 45. Filter body; 451. Cover plate; 46. Filter screen; 47. Vibration screening chamber; 48. Vibration screening balls; 49. Cone; 5. Vibration screening drive; 51. Mounting seat; 52. Compression spring; 53. Drive motor; 54. Driving wheel; 55. Oscillating member; 551. Fixed shaft; 552. Driven wheel; 553. Vibration screening plate; 554. Vibration screening 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 member; 101. Pressing plate; 102. Spring. Specific embodiments

[0021] 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.

[0022] It should be noted that in the specific embodiments of the present invention, relative 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 may be 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 the like that defines an element does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0023] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "coupled", "provided with" that may appear should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, or it may 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.

[0024] Example 1: As Figures 1 to 9 shown: An efficient soil sample screening device for hydrogeological, engineering geological and environmental geological surveys, comprising 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 wrapped 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 end of the box body 1, a feed inlet 14 is provided, and a feed hopper 15 is also connected above the feed inlet 14; with such a setting, it is convenient to carry out the feeding operation.

[0025] Referring to Figure 2 the shown structure, in this embodiment, the box body 1 is sequentially 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 arranged on the bottom frame 21. There are four side wing plates 23, all of which are 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 preliminary screening operation. A diversion pipe 24 is also provided on the left side wing plate 23, and a switching valve 17 is installed on the diversion pipe 24. The switching valve 17 is connected with a control switch, and automatic control can also be realized through a PLC controller. A first discharge pipe 18 is also provided outside the box body 1 corresponding to the position of the pre-screening chamber 11. 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 preliminary 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 filtered out of the ultra-large particle size in the preliminary 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.

[0026] 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 arranged on the front and rear side wing plates 23. The sliding groove 32 is arranged on the inner wall of the pre-screening chamber 11, and the sliding column 31 and the sliding groove 32 are matched and installed. 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 arranged on the output shaft of the swinging motor 34. The connecting shaft 36 is eccentrically arranged 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 of a preset weight, the swinging motor 34 starts, and then drives the turntable 35 to rotate synchronously, and then drives 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 column 31 and the sliding groove 32. In this way, a shaking screening effect on the soil sample material in the pre-screening mesh 2 is formed, enhancing the separation and filtration effect of the soil sample material.

[0027] 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 different weight-level parameters, 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 such a setting is to achieve the initial screening shaking separation operation with automatic adjustment for different soil sample material weights, and achieve the purpose of rational resource utilization.

[0028] 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 provided on the right side wing plate 23, and the time relay 38 is provided 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 provided on the lower end surface of the push plate 39, and is kept at 1-2 cm and in pressing 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 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. After actual consideration in the laboratory and equipment screening, the time relay 38 is initialized to control the elongation process time of the electro-hydraulic push rod 37 to be 30 s, the intermittent stop time to be 30 s, and the contraction and reset time to be 60 s. Thus, one periodic telescopic movement of the electro-hydraulic push rod 37 is 120 s.

[0029] When the electric hydraulic push rod 37 is started, it will drive the push plate 39 to move from right to left, and its moving stroke is close to the side wing plate 23 distributed on the left. Specifically, in the shaking operation started by the shaking motor 34, the telescopic stroke of the electric hydraulic push rod 37 is half of the full stroke; in the unloading operation of the pre-screen 2, the telescopic stroke of the electric hydraulic push rod 37 is the full stroke. In this way, in the shaking operation started by the shaking motor 34, the push plate 39 and the brush 310 move back and forth periodically as a whole, which will form a "stirring and turning" effect on the soil sample material, avoiding the phenomenon of soil sample material accumulation causing the mesh of the pre-screen 2 to be blocked, and enhancing the efficiency and separation effect of the initial screening of the soil sample material. During the unloading operation of the pre-screen 2, the overall left and right movement of the push plate 39 and the brush 310 will form a "pushing" effect on the soil sample material with super large particle size filtered out in the primary screening stage, avoiding the phenomenon of mesh jamming of the soil sample material, and enhancing the effect of unloading the soil sample material. At the same time, the left and right reciprocating movement of the brush 310 can also clean the mesh of the pre-screen 2 to avoid mesh clogging, thereby improving the effect of screening the soil sample material. The present invention has a compact structure and a reasonable design. Compared with the screening equipment of the same level, it reduces the volume by about 30%, and optimizes the spatial structure of the primary screening and fine screening.

[0030] like Figure 2 and Figure 3 As shown in the figure: In this embodiment, a fine screen 4 and a vibrating screen drive 5 are also provided in the fine screening chamber 12; the fine screen 4 is mainly composed of an upper screen 41, a lower screen 42 and a fixed frame 43 arranged therebetween, and the enclosed area of ​​the three forms a screening processing chamber 44. Figure 7 As shown in the figure, the upper screen 41 as a whole adopts a screen structure with a uniform mesh diameter. The purpose of such a 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 in sequence from left to right and whose mesh sizes gradually decrease. 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 the vibrating screen chambers 47 is consistent with the filter bodies 45, and the mesh diameter of the filter screen 46 is consistent with the mesh diameter of the filter body 45 distributed on the left side below. The purpose of such a setting is that one vibrating screen chamber 47 is equivalent to the screening of soil sample materials of one 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.

[0031] like Figure 2Shown: In a preferred embodiment, there are two evenly spaced filter meshes 46, and there are three vibrating sieve chambers 47 and three filter bodies 45 respectively; in this way, the three vibrating sieve 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 at the R5 level 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 at the R4 level. The vibrating sieve chamber 47 distributed on the left mainly filters and screens out soil sample collection materials with particle size at the R3 level. The vibrating sieve chamber 47 distributed in the middle mainly filters and screens out soil sample collection materials with particle size at the R2 level. The vibrating sieve chamber 47 distributed on the right mainly filters and screens out soil sample collection materials with particle size at the R1 level. 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 of a mesh structure. In the initial state, the cover plate 451 and the filter body 45 are fixedly installed by buckles. 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 requirements of soil sample collection.

[0032] As Figure 3 Shown: In this embodiment, in order to enhance the screening and filtering effect, a plurality of vibrating sieve balls 48 are also provided in each vibrating sieve chamber 47, and a plurality of cones 49 are evenly distributed on the vibrating sieve balls 48; with such a setting, under the high-frequency vibration of the fine screening mesh 4, the vibrating sieve balls 48 will jump up and down in the corresponding vibrating sieve chamber 47, forming a vibration effect on the upper screening mesh 41 and the lower screening mesh 42. Moreover, the amplitudes and frequencies of the jumps of different vibrating sieve balls 48 are also different, so the formed vibrating sieve effects are also different. Therefore, in a preferred embodiment, three grades of diameter-sized vibrating sieve balls 48 are provided in one vibrating sieve chamber 47 to enhance the fine vibrating sieve effect of the fine screening mesh 4. At the same time, the cones 49 on the vibrating sieve balls 48 can not only form a crushing and pressing effect on the soil sample materials during the up and down jumping process, but also can clean the phenomenon of mesh hole embedding or blockage of the upper screening mesh 41 and the lower screening mesh 42, greatly improving the efficiency of soil sample material screening and having stronger practicability.

[0033] 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 on the fine screening mesh 4. In a preferred embodiment, the vibrating screen drive 5 is divided into 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 installed at each mounting seat 51. The top 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 installed in the fine screening cavity 12 through a bracket; the driving wheel 54 is sleeved on the output shaft of the drive motor 53.

[0034] 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, one 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 arm 554. Such a setting forms an auxiliary support effect on the vibrating sieve arm 554, and the vibrating sieve arm 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, no matter 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 the effect of staggered oscillation, 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.

[0035] 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 fit installation of the moving block 557 and the moving groove 556, the moving trajectory 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 fine screening and collection of soil samples with different particle sizes, providing favorable conditions for the inspection and analysis of soil samples with different particle sizes used in subsequent hydrogeological, engineering geological and environmental geological surveys.

[0036] 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.

[0037] Embodiment 2: On the basis of Embodiment 1, as Figure 2 and Figure 11 shown: A high-efficiency soil sample screening device for hydrogeological, engineering geological and environmental geological surveys 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 thus improving the operation efficiency of the soil sample material conveying and screening.

[0038] Embodiment 3: On the basis of Embodiment 2, as Figure 10As shown in the figure: An efficient 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; With such a setting, the sealing effect is ensured. 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.

[0039] 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 principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. An efficient soil sample screening device for hydraulic engineering and environmental investigation, characterized in that: It includes a box body, which is distributed on the left and right, and is divided into a pre-screen chamber, a fine screen chamber and an aggregate chamber from top to bottom; a pre-screen mesh and a pre-screen drive are arranged in the pre-screen chamber; the pre-screen mesh is distributed on the left and right, and the pre-screen drive is used to drive the pre-screen mesh to swing back and forth with a preset amplitude, and can complete the periodic pushing and automatic unloading operations of soil samples; a fine screen mesh and a vibrating screen drive are also arranged in the fine screen chamber; the fine screen mesh is mainly composed of an upper screen mesh, a lower screen mesh and a fixed frame arranged between the two, and the enclosed area of ​​the three forms a screening processing chamber; the lower screen mesh is divided into a plurality of filter bodies which are distributed from left to right and the mesh size is gradually reduced; the screening processing The cavity is divided into vibrating screen chambers by multiple evenly distributed filter screens, and the number of vibrating screen chambers is consistent with the filter body, and the mesh diameter of the filter screen is consistent with the mesh diameter of the filter body distributed on the lower left; the mesh diameter of the upper screen is smaller than the mesh size of the pre-screen and larger than the mesh size of the filter body distributed on the far left; multiple vibrating screen balls are also provided in each vibrating screen chamber, and multiple evenly distributed cones are also provided on the vibrating screen balls; the vibrating screen drive is used to form periodic oscillations of a preset amplitude on the fine screen; the aggregate chamber is divided into storage chambers by partitions, and the number of storage chambers is consistent with the number of vibrating screen chambers; each storage chamber is also adapted to be installed with an aggregate box.

2. The high-efficiency soil sample screening device for hydraulic engineering and environmental investigation according to claim 1 is characterized in that: A feed port is provided on one side of the top of the box body, and a feed hopper is connected above the feed port; a second discharge pipe is also provided on the right side wall of the box body, the input end of the second discharge pipe corresponds to the upper screen, and a switch valve is also provided on the second discharge pipe.

3. The high-efficiency soil sample screening device for hydraulic engineering and environmental investigation according to claim 2 is characterized in that: A feeding structure is also provided at the feed port, and the feeding structure includes a fixed frame, a feeding auger, and a feeding motor; the fixed frames are two, distributed upper and lower, and fixedly installed at the feed port; the feeding auger is rotatably installed between the upper and lower fixed frames, and the feeding motor is fixedly installed on the fixed frame below, and the output shaft is connected to the feeding auger.

4. The high-efficiency soil sample screening device for hydraulic engineering and environmental investigation according to claim 3 is characterized by: The pre-screen 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, and there are four side wing plates, all of which are fixedly installed on the bottom frame; the bottom frame, the mesh body and the side wing plates together form a soil sample processing chamber; and a guide pipe is also provided on the left side wing plate, and a switch valve is installed on the guide pipe; a first discharge pipe is also provided at a position corresponding to the pre-screen chamber on the outside of the box body, and the inner diameter of the first discharge pipe is larger than the outer diameter of the guide pipe.

5. The high-efficiency soil sample screening device for hydraulic engineering and environmental investigation according to claim 4 is characterized in that: The pre-screening drive includes a sliding column, a sliding groove, a movable 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 chamber, and the sliding column and the sliding groove are kept matched and installed; the shaking 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 shaking motor, and the connecting shaft is eccentrically arranged on the turntable, one end of the movable arm is hinged to the right side wing plate, and the other end is hinged to the connecting shaft.

6. The high-efficiency soil sample screening device for hydraulic engineering and environmental investigation according to claim 5 is characterized by: The pre-screening drive also includes an electric hydraulic push rod, a time relay, a push plate, and a brush; one end of the electric hydraulic push rod is arranged on the side wing plate on the right side, and the time relay is arranged on the electric hydraulic push rod, and the two maintain signal connection; the push plate is fixedly installed on one end of the electric hydraulic push rod, and the brush is arranged on the lower end surface of the push plate, and is maintained at 1-2cm, and is kept in tight contact with the mesh body.

7. The high-efficiency soil sample screening device for hydraulic engineering and environmental investigation according to claim 6 is characterized by: There are two filter screens evenly spaced, and there are three vibrating screen chambers and filter bodies. A cover plate is also 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 fastened and installed by buckles.

8. The high-efficiency soil sample screening device for hydraulic engineering and environmental investigation according to claim 7 is characterized by: The vibrating screen drive is divided into two groups symmetrically distributed, and each group of the vibrating screen drive includes a mounting seat, a compression spring, a driving motor, a driving wheel and two groups of oscillating parts; the mounting seats are four horizontally distributed at four corners, and the mounting seats are concave structures; two compression springs are installed at each mounting seat, and the top end of the compression spring distributed on the upper side is fixedly connected to the mounting seat, and the bottom end is fixed 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 fixed to the fixed frame by welding; the driving motor is fixedly installed in the fine screen cavity through a bracket; the driving wheel sleeve is installed on the output shaft of the driving motor; the oscillating part is used to form an oscillating operation on the fixed frame.

9. The high-efficiency soil sample screening device for hydraulic engineering and environmental investigation according to claim 8 is characterized in that: The oscillating member includes a fixed shaft, a driven wheel, a vibrating screen plate, and a vibrating screen arm; the fixed shaft is rotatably mounted on the side wall of the fine screening chamber, the driven wheel is sleeved and mounted on the fixed shaft, and the driving wheel and the driven wheel are connected by a belt; the vibrating screen plate is coaxially mounted on the fixed shaft, and a side surface is also provided with a moving groove with an elliptical structure, the vibrating screen arm is vertically distributed, and the bottom end is adapted to be installed in the moving groove through a moving block; an auxiliary plate is also provided on the side wall of the fine screening chamber, and the auxiliary plate is provided with a through hole, which is adapted to install the vibrating screen arm, and the top of the vibrating screen arm is always in contact with the fixed frame; and the oscillation amplitude of the vibrating screen arm in the left-side distribution oscillating member is kept greater than the oscillation amplitude of the vibrating screen arm in the right-side distribution oscillating member.

10. The high-efficiency soil sample screening device for hydraulic engineering and environmental investigation according to claim 9 is characterized in that: 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 clamping piece is also provided on the inner side wall of the box door; the clamping piece includes a clamping plate and a spring; the spring is evenly distributed, and one end is fixedly connected to the box door, and the other end is fixedly connected to the clamping plate; when the box door is closed, the clamping plate forms a top pressure and tightening operation on the aggregate box.

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