Stratified sampling device for applied statistics

Abstract

The present invention relates to the technical field of stratified sampling devices for applied statistics, and particularly to a stratified sampling device for applied statistics. The stratified sampling device comprises: a sampling device, wherein a plurality of water intake pipes are inserted into the periphery of the sampling device, the sampling device is provided with a closed cavity in the middle of each water intake pipe, the sampling device is provided with a mounting cavity at the bottom of the closed cavity, an electric push rod is provided in the mounting cavity, and the electric push rod extends out of the mounting cavity and is then connected to a closing plate in the closed cavity; and a support column, wherein a lead screw is provided in the middle of the support column, a connecting block is slidably connected on the lead screw, and the other end of the connecting block is connected to the sampling device. The beneficial effect lies in: in the stratified sampling device for applied statistics provided by the present invention, after sampling bottles are mounted, a lead-screw electric motor at the top of the support column starts to drive the lead screw to rotate, the connecting block on the lead screw thus drives the sampling device to ascend and descend in water, and according to the depth of the water, the electric push rod starts to drive the closing plate in the closed cavity to retract, thereby enabling the closing plate to open the water intake pipe.

Description

A stratified sampling device for applied statistics Technical Field

[0001] The present invention relates to the technical field of stratified sampling devices for applied statistics, in particular to a stratified sampling device for applied statistics. Background Art

[0002] Stratified sampling, also known as typological sampling, involves randomly selecting samples (individuals) from a population that can be divided into subpopulations (or strata) according to a specified proportion. The advantages of this method are greater sample representativeness and reduced sampling error. However, its disadvantage is that the sampling procedure is more complex than simple random sampling. Stratified sampling is an excellent probability sampling method used in quantitative surveys and is frequently used.

[0003] In existing technologies, a series of water quality parameters and standards are currently established to evaluate water quality, such as those for drinking water, industrial water, and fishery water. When sampling water quality, stratified sampling is often used to collect water at different depths to determine the water quality standard.

[0004] However, most existing water quality monitoring sampling devices cannot achieve multi-level depth water sampling at one time. The sampling hose needs to be inserted into the water at different depths back and forth for multiple samplings, resulting in low sampling efficiency. Summary of the Invention

[0005] The object of the present invention is to provide a stratified sampling device for applied statistics to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a sampling device, wherein multiple groups of water inlet pipes are connected around the sampling device, a closed groove is opened in the middle of the water inlet pipe, and an installation groove is opened at the bottom of the closed groove of the sampling device, an electric push rod is provided in the installation groove, the electric push rod extends from the installation groove and is connected to the closing plate in the closed groove; and a support column, a screw rod is provided in the middle of the support column, a connecting block is slidably connected to the screw rod, and the other end of the connecting block is connected to the sampling device.

[0007] Preferably, a screw motor is provided on the top of the support column, and the screw is plugged into the bottom of the screw motor. The screw motor can control the rotation of the screw so that the connecting block on the screw drives the sampling device to slide up and down on the screw.

[0008] Preferably, the inner opening of the water inlet pipe is provided with a threaded opening, and the water inlet pipe is connected to the sampling bottle through the threaded opening. The opening of the sampling bottle is also provided with a threaded opening, and the water inlet pipe and the sampling bottle are connected and fixed through the threaded opening. The water inlet pipe can introduce water into the sampling bottle.

[0009] Preferably, a holding groove is provided at the bottom of the sampling device, a holding ring is provided in the holding groove, the bottom of the holding ring is connected to a rotating ring, the bottom of the rotating ring is connected to multiple groups of support plates, the support plates are located at the bottom of the sampling bottle, and the support plates can support the sampling bottle to prevent the connection between the sampling bottle and the threaded mouth from loosening, causing the sampling bottle to fall.

[0010] Preferably, a toggle column is provided at the bottom of the holding ring, and the toggle column can drive the holding ring to rotate, so that the multiple groups of support plates connected to the holding ring are separated from the support for the sampling bottle, thereby preventing the support plate from hindering the disassembly of the sampling bottle when the sampling bottle is disassembled.

[0011] Preferably, the top of the electric push rod extends from the mounting groove and is connected to the filter screen in the closed groove. The electric push rod can push the closed plate upward so that the closed plate seals the water inlet pipe to prevent water from flowing into the sampling bottle along the water inlet pipe.

[0012] Preferably, the water inlet pipe is provided with filter screens on the openings on both sides of the closed groove, and the filter screens can filter the water flow to prevent debris and weeds in the water flow from flowing into the sampling bottle along the water inlet pipe and affecting the detection.

[0013] Preferably, telescopic grooves are provided on both sides of the top of the closing plate, a spring is provided in the telescopic groove, the outer side of the spring is connected to the telescopic plate, and the telescopic plate can squeeze the spring to shrink the telescopic plate into the telescopic groove.

[0014] Preferably, bristles are provided on the outside of the telescopic plate. When the electric push rod drives the closing plate to rise and fall, the telescopic plate can drive the bristles to pop out from the telescopic groove to clean the filter screens provided on both sides of the closing groove of the water inlet pipe, thereby preventing debris from clogging the filter screen and preventing water from entering the sampling bottle.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The present invention proposes a stratified sampling device for application statistics. After the sampling bottle is installed, the screw motor on the top of the support column starts to drive the screw to rotate, so that the connecting block on the screw drives the sampling device to rise and fall in the water. According to the depth of the water quality, the electric push rod starts to drive the closing plate in the closing groove to contract, so that the closing plate opens the seal on the water inlet pipe, and the water flows into the sampling bottle along the water inlet pipe. When the closing plate contracts, the spring in the telescopic groove opened on the top of the closing plate drives the telescopic plate to pop out of the telescopic groove, so that the bristles arranged on the outside of the telescopic plate clean the filter screens arranged on both sides of the closing groove and the openings at both ends of the water inlet pipe while descending, to prevent weeds and debris from clogging the filter screen, resulting in the water flow being unable to flow into the sampling bottle along the water inlet pipe. When the sampling bottle is full, the electric push rod drives the closing plate to rise in the closing groove again, so that the closing plate closes the water inlet pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] FIG1 is a schematic diagram of the three-dimensional structure of the present invention;

[0018] FIG2 is a schematic diagram of the top view of the sampling device of the present invention;

[0019] FIG3 is a schematic cross-sectional view of the sampling device of the present invention;

[0020] FIG4 is an enlarged schematic diagram of the structure at point A in FIG3 ;

[0021] FIG5 is a schematic diagram of the cross-sectional structure of another side of the sampling device of the present invention.

[0022] In the figure: support column 1, screw 2, screw motor 3, connecting block 4, sampling device 5, water inlet pipe 6, sampling bottle 7, rotating ring 8, support plate 9, toggle column 10, holding groove 11, holding ring 12, threaded mouth 13, closing groove 14, filter 15, mounting groove 16, electric push rod 17, closing plate 18, telescopic groove 19, spring 20, telescopic plate 21, and bristles 22. DETAILED DESCRIPTION

[0023] In order to clearly and completely describe the objectives and technical solutions of the present invention and make the advantages more clearly understood, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, not all of them, and are only used to explain the embodiments of the present invention, not to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] Please refer to Figures 1 to 5. The present invention provides a technical solution: a sampling device 5, wherein multiple groups of water inlet pipes 6 are inserted around the sampling device 5, a closed groove 14 is opened in the middle of the water inlet pipe 6, and a mounting groove 16 is opened at the bottom of the closed groove 14 of the sampling device 5. An electric push rod 17 is provided in the mounting groove 16, and the electric push rod 17 extends from the mounting groove 16 and is connected to the closing plate 18 in the closed groove 14; and a support column 1, wherein a screw rod 2 is provided in the middle of the support column 1, and a connecting block 4 is slidably connected to the screw rod 2, and the other end of the connecting block 4 is connected to the sampling device 5; a screw motor 3 is provided at the top of the support column 1, and the screw rod 2 is inserted at the bottom of the screw motor 3. The screw motor 3 can control the rotation of the screw rod 2, so that the connecting block 4 on the screw rod 2 drives the sampling device 5 to slide up and down on the screw rod 2;

[0025] The inner opening of the water inlet pipe 6 is provided with a threaded opening 13, and the water inlet pipe 6 is connected to the sampling bottle 7 through the threaded opening 13. The opening of the sampling bottle 7 is also provided with a threaded opening 13. The water inlet pipe 6 and the sampling bottle 7 are connected and fixed through the threaded opening 13. The water inlet pipe 6 can introduce water into the sampling bottle 7; the bottom of the sampling device 5 is provided with a clamping groove 11, and a clamping ring 12 is provided in the clamping groove 11. The bottom of the clamping ring 12 is connected to the rotating ring 8, and the bottom of the rotating ring 8 is connected to multiple groups of support plates 9. The support plate 9 is located at the bottom of the sampling bottle 7. The support plate 9 can support the sampling bottle 7 to prevent the sampling bottle 7 from leaking. The connection with the threaded opening 13 is loose, causing the sampling bottle 7 to fall off; a toggle post 10 is provided at the bottom of the clamping ring 12, and the toggle post 10 can drive the clamping ring 12 to rotate, so that the multiple groups of support plates 9 connected to the clamping ring 12 are separated from the support of the sampling bottle 7, preventing the support plates 9 from hindering the removal of the sampling bottle 7 when the sampling bottle 7 is removed; the top of the electric push rod 17 extends from the mounting groove 16 and is connected to the filter screen 15 in the closing groove 14. The electric push rod 17 can push the closing plate 18 up, so that the closing plate 18 seals the water inlet pipe 6, preventing water from flowing into the sampling bottle 7 along the water inlet pipe 6;

[0026] The water inlet pipe 6 is provided with a filter 15 on the openings on both sides of the closed groove 14. The filter 15 can filter the water flow to prevent debris and weeds in the water flow from flowing into the sampling bottle 7 along the water inlet pipe 6 and affecting the detection; telescopic grooves 19 are provided on both sides of the top of the closing plate 18, and a spring 20 is provided in the telescopic groove 19. The outer side of the spring 20 is connected to the telescopic plate 21, and the telescopic plate 21 can squeeze the spring 20 to shrink the telescopic plate 21 into the telescopic groove 19; the outer side of the telescopic plate 21 is provided with bristles 22. When the electric push rod 17 drives the closing plate 18 to rise and fall, the telescopic plate 21 can drive the bristles 22 to pop out of the telescopic groove 19 to clean the filter 15 set on both sides of the closed groove 14 of the water inlet pipe 6 to prevent debris from clogging the filter 15, resulting in the water flow being unable to enter the sampling bottle 7.

[0027] In actual use, when sampling the water quality in layers, first install multiple sampling bottles 7 at the bottom inside the water inlet pipe 6 through the threaded opening 13, and then toggle the toggle column 10, which drives the rotating ring 8 to rotate, so that the support plate 9 at the bottom of the rotating ring 8 is located just below the sampling bottle 7, supporting the bottom of the sampling bottle 7 to prevent the sampling bottle 7 from falling; after the sampling bottle 7 is installed, the screw motor 3 on the top of the support column 1 starts to drive the screw 2 to rotate, so that the connecting block 4 on the screw 2 drives the sampling device 5 to rise and fall in the water, and according to the depth of the water quality, the electric push rod 17 starts to drive the closing plate 18 in the closing groove 14 to contract, so that the closing plate 18 opens the seal on the water inlet pipe 6, so that the water flows along the water inlet pipe 6 into the sampling bottle 7, and the closing plate 1 8 While contracting, the spring 20 in the telescopic groove 19 opened at the top of the closing plate 18 drives the telescopic plate 21 to pop out of the telescopic groove, so that the bristles 22 arranged on the outside of the telescopic plate 21 clean the filter screens 15 set at both sides of the closing groove 14 and the openings at both ends of the water inlet pipe 6 while descending, to prevent weeds and debris from clogging the filter screen 15, resulting in the water flow being unable to flow into the sampling bottle 7 along the water inlet pipe 6. When the sampling bottle 7 is full, the electric push rod 17 drives the closing plate 18 to rise in the closing groove 19 again, so that the closing plate 18 closes the water inlet pipe 6 to prevent the water flow from entering the sampling bottle 7, and then the screw motor 3 controls the screw 2 to rotate again, so that the connecting block 4 drives the sampling device 5 to descend to the next depth of the water quality, and collects the water quality again.

[0028] Although the above describes the illustrative specific implementation methods of the present application so that those skilled in the art can understand the present application, the present application is not limited to the scope of the specific implementation methods. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present application defined and determined by the attached claims, all application creations based on the concept of the present application are protected.

Claims

1. A stratified sampling device for applied statistics, characterized in that: include: A sampling device (5), wherein a plurality of water inlet pipes (6) are connected around the sampling device (5), a closed groove (14) is provided in the middle of the water inlet pipe (6), a mounting groove (16) is provided at the bottom of the closed groove (14), an electric push rod (17) is provided in the mounting groove (16), and the electric push rod (17) extends from the mounting groove (16) and is connected to a closing plate (18) in the closed groove (14); and A support column (1) is provided with a screw rod (2) in the middle of the support column (1), a connecting block (4) is slidably connected to the screw rod (2), and the other end of the connecting block (4) is connected to a sampling device (5).

2. A stratified sampling device for applied statistics according to claim 1, characterized in that: A screw motor (3) is provided at the top of the support column (1), and the screw (2) is plugged into the bottom of the screw motor (3). The screw motor (3) can control the screw (2) to rotate, so that the connecting block (4) on the screw (2) drives the sampling device (5) to slide up and down on the screw (2).

3. The stratified sampling device for applied statistics according to claim 2, characterized in that: The inner opening of the water inlet pipe (6) is provided with a threaded opening (13), and the water inlet pipe (6) is connected to the sampling bottle (7) via the threaded opening (13). The opening of the sampling bottle (7) is also provided with a threaded opening (13), and the water inlet pipe (6) and the sampling bottle (7) are connected and fixed via the threaded opening (13). The water inlet pipe (6) can guide water into the sampling bottle (7).

4. A stratified sampling device for applied statistics according to claim 3, characterized in that: The bottom of the sampling device (5) is provided with a holding groove (11), a holding ring (12) is provided in the holding groove (11), the bottom of the holding ring (12) is connected to the rotating ring (8), the bottom of the rotating ring (8) is connected to a plurality of support plates (9), the support plates (9) are located at the bottom of the sampling bottle (7), and the support plates (9) can support the sampling bottle (7) to prevent the connection between the sampling bottle (7) and the threaded opening (13) from loosening, causing the sampling bottle (7) to fall.

5. A stratified sampling device for applied statistics according to claim 4, characterized in that: A toggle column (10) is provided at the bottom of the clamping ring (12). The toggle column (10) can drive the clamping ring (12) to rotate, so that the multiple groups of support plates (9) connected to the clamping ring (12) are separated from the support for the sampling bottle (7), thereby preventing the support plates (9) from hindering the disassembly of the sampling bottle (7) when the sampling bottle (7) is disassembled.

6. A stratified sampling device for applied statistics according to claim 5, characterized in that: The top of the electric push rod (17) extends from the mounting groove (16) and is connected to the filter screen (15) in the closing groove (14). The electric push rod (17) can push the closing plate (18) upward, so that the closing plate (18) seals the water inlet pipe (6) to prevent water from flowing into the sampling bottle (7) along the water inlet pipe (6).

7. A stratified sampling device for applied statistics according to claim 6, characterized in that: The water inlet pipe (6) is provided with filter screens (15) on the openings on both sides of the closed groove (14). The filter screens (15) can filter the water flow to prevent debris and weeds in the water flow from flowing into the sampling bottle (7) along the water inlet pipe (6) and affecting the detection.

8. A stratified sampling device for applied statistics according to claim 7, characterized in that: Telescopic grooves (19) are provided on both sides of the top of the closing plate (18), and a spring (20) is provided in the telescopic groove (19). The outer side of the spring (20) is connected to the telescopic plate (21). The telescopic plate (21) can squeeze the spring (20) to shrink the telescopic plate (21) into the telescopic groove (19).

9. The stratified sampling device for applied statistics according to claim 8, characterized in that: Brushes (22) are provided on the outer side of the telescopic plate (21). When the electric push rod (17) drives the closing plate (18) to rise and fall, the telescopic plate (21) can drive the brushes (22) to pop out from the telescopic groove (19) to clean the filter screen (15) provided on both sides of the closing groove (14) of the water inlet pipe (6), thereby preventing debris from clogging the filter screen (15) and preventing water from entering the sampling bottle (7).

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