A sewage detection sampling device

Abstract

The present invention relates to the technical field of sewage sampling, and discloses a sewage detection sampling device, including a floating plate, a circular through groove is provided on the top of the floating plate, and also includes: a U-shaped frame, the U-shaped frame is fixedly installed on the top of the floating plate; a pumping assembly, the pumping assembly is arranged on the horizontal side of the U-shaped frame, and the pumping assembly is used to extract sewage of different depths; a drainage assembly, the drainage assembly is arranged on the horizontal side of the U-shaped frame, the drainage assembly is also connected to the pumping assembly, and the drainage assembly is used to discharge the water extracted by the pumping assembly; a driving assembly, the driving assembly is arranged on the horizontal side of the U-shaped frame, and the driving assembly is used to drive the pumping assembly and the drainage assembly to work. The present invention can automatically change the position of the water outlet head when switching the sleeve height, so that the water outlet head will not enter the sampling tube when draining water for the first time at the specified position, and the water outlet head automatically moves to the top of the sampling tube before the second drainage, so as to achieve accurate sampling of sewage, thereby improving the use effect of the device.

Description

Technical Field

[0001] The invention relates to the technical field of sewage sampling, and in particular to a sewage detection sampling device. Background Art

[0002] Sewage refers to the discharged water from life and production that is polluted to a certain extent. It causes a lot of water resource pollution in industry and life. Water resource protection and sewage treatment are of vital importance. For this reason, water plants need to conduct material testing on sewage in order to plan appropriate multi-channel purification treatment procedures to ensure that the water body can meet the prescribed purification standards. Before sewage treatment, it is necessary to sample and test the sewage.

[0003] Although the current sewage detection sampling device can sample sewage, it uses the same pumping pipe for continuous sampling, causing cross-contamination between two adjacent sewage samplings, resulting in the sampled sewage being unrepresentative and reducing the sampling effect. Therefore, it is urgent to design a sewage detection sampling device. Summary of the invention

[0004] The purpose of the present invention is to solve the problems existing in the prior art and to propose a sewage detection sampling device.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A sewage detection sampling device comprises a floating plate, a circular through groove is provided on the top of the floating plate, and further comprises:

[0007] U-shaped frame, the U-shaped frame is fixedly installed on the top of the floating plate;

[0008] A pumping assembly is arranged on the horizontal side of the U-shaped frame, and is used to extract sewage at different depths;

[0009] A drainage component is arranged on the horizontal side of the U-shaped frame, and is also connected to the pumping component, and is used to discharge the water pumped by the pumping component;

[0010] The driving assembly is arranged on the horizontal side of the U-shaped frame, and is used to drive the pumping assembly and the drainage assembly to work.

[0011] As a further technical solution of the present invention, the pumping assembly includes: a sampling box, which is fixedly installed on the top of the horizontal side of the U-shaped frame, and a piston plate is slidably arranged inside the sampling box, a pumping pipe is vertically installed on the bottom of the horizontal side of the U-shaped frame, the pumping pipe and the sampling box are connected, and a first one-way valve is installed on the top of the surface of the pumping pipe, a sleeve is slidably sleeved on the surface of the pumping pipe, and the bottom of the sleeve is open, a sleeve plate is fixedly sleeved on the surface of the sleeve, a second spring rod is vertically fixedly installed on the bottom of the horizontal side of the U-shaped frame, and the telescopic end of the second spring rod is fixedly installed on the top of the sleeve plate.

[0012] As a further technical solution of the present invention, a roller is installed vertically for rotation at the bottom of the horizontal side of the U-shaped frame, and an arc groove and a straight groove are opened on the surface of the roller, the arc groove and the straight groove are connected end to end, a sliding rod is fixedly installed horizontally on the surface of the sleeve, and the end of the sliding rod is slidably installed inside the arc groove and the straight groove.

[0013] As a further technical solution of the present invention, the drainage component includes: a corrugated hose, which is installed at the bottom of the horizontal side of the U-shaped frame, and the corrugated hose is connected to the sampling box, the end of the corrugated hose is connected and a water outlet is installed, the end of the water outlet is installed with a second one-way valve, and a slide is fixedly sleeved on the surface of the water outlet, a slide groove is opened at the bottom of the horizontal side of the U-shaped frame, and the top of the slide is slidably installed in the slide groove, a folding rod is fixedly installed on the side of the slide, and the horizontal edge of the folding rod is located above the horizontal edge of the U-shaped frame.

[0014] As a further technical solution of the present invention, a column is rotatably installed on the top of the floating plate, and a turntable is fixedly installed on the top of the column. Four circular placement grooves evenly distributed are opened on the top of the turntable, and a sampling tube is placed inside each placement groove. A third pulley is fixedly installed on the surface of the column and the bottom of the roller, and a third belt is sleeved on the surface of the two third pulleys.

[0015] As a further technical solution of the present invention, the driving assembly includes: a rotating shaft, which is vertically rotatably installed on the top of the horizontal side of the U-shaped frame, and the bottom of the rotating shaft is fixedly installed at the center of the top of the roller through a connecting shaft, and a large gear is fixedly sleeved on the surface of the rotating shaft, the large gear is a missing gear, and the convex teeth on the large gear are equally divided into four groups, a driving motor is vertically installed on the top of the horizontal side of the U-shaped frame, and a second pulley is fixedly installed on the top of the output shaft of the driving motor and the top of the rotating shaft, and a second belt is sleeved on the surface of the two second pulleys.

[0016] As a further technical solution of the present invention, a rotating rod is vertically rotatably installed on the top of the horizontal side of the U-shaped frame, a one-way bearing is fixedly sleeved on the surface of the rotating rod, a small gear and a ring are rotatably sleeved on the surface of the rotating rod, the end of the ring is fixedly installed on the top of the small gear, and the small gear and the large gear are meshed with each other, and a first spring rod is horizontally fixedly installed on the surface of the ring.

[0017] As a further technical solution of the present invention, a circular groove compatible with the one-way bearing is opened at the bottom of the pinion, the outer ring of the one-way bearing is fixedly installed on the inner wall of the circular groove, a torsion spring is sleeved on the surface of the rotating rod, and the two ends of the torsion spring are respectively fixedly installed on the bottom of the pinion and the top of the horizontal side of the U-shaped frame.

[0018] As a further technical solution of the present invention, a large pulley is fixedly installed on the top of the rotating rod, a shaft is rotatably installed on the side of the sampling box, and a small pulley is fixedly installed on the end of the shaft, and the first belt is sleeved on the surface of the small pulley and the large pulley.

[0019] As a further technical solution of the present invention, a reciprocating screw is vertically fixedly installed on the top of the shaft rod, and an L-shaped plate is connected to the surface of the reciprocating screw through a threaded sleeve. The vertical side of the L-shaped plate passes through the horizontal side of the sampling box, and the end of the vertical side of the L-shaped plate is fixedly installed on the top of the piston plate.

[0020] The beneficial effects of the present invention are:

[0021] Firstly, the present invention, through the arrangement of the pumping assembly, the drainage assembly and the driving assembly, can not only sample sewage at different depths, but also automatically clean the pumping pipe and the corrugated hose and other components with the sewage at the specified depth before sampling, thereby ensuring that when the sewage is sampled, no sewage from other depths will remain on the inner walls of the pumping pipe and the corrugated hose and other components, and no cross contamination will occur between two adjacent samplings, thereby improving the sampling accuracy of the device;

[0022] Secondly, the present invention, through the setting of the drainage component and the driving component, can automatically change the position of the water outlet head when switching the sleeve height, so that the water will not enter the sampling cylinder when draining water for the first time at the specified position, and the water outlet head automatically moves to the top of the sampling cylinder before the second drainage, so as to achieve accurate sampling of sewage, thereby improving the use effect of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the structure of a sewage detection sampling device proposed by the present invention;

[0024] Figure 2 for Figure 1 A magnified schematic diagram of part A;

[0025] Figure 3 A schematic cross-sectional view of a sampling box of a sewage detection sampling device proposed by the present invention;

[0026] Figure 4 This is a schematic diagram of the U-shaped frame structure from above of a sewage detection sampling device proposed by the present invention;

[0027] Figure 5 This is a schematic diagram of the structure of a sewage detection sampling device proposed by the present invention after removing the U-shaped frame;

[0028] Figure 6 for Figure 5 A magnified schematic diagram of part B;

[0029] Figure 7 This is a bottom view schematic diagram of a rotating rod and a connecting structure of a sewage detection sampling device proposed by the present invention.

[0030] In the figure: 1, floating plate; 2, U-shaped frame; 3, turntable; 4, sampling tube; 5, sampling box; 6, water outlet; 7, folding rod; 8, reciprocating screw; 9, L-shaped plate; 10, driving motor; 11, roller; 12, shaft; 13, first belt; 14, small pulley; 15, large pulley; 16, rotating rod; 17, collar; 18, first spring rod; 19, small gear; 20, large gear; 21, second belt; 22, second pulley; 23, arc groove; 24, straight groove; 25, slide rod; 26, water pumping pipe; 27, sleeve; 28, second spring rod; 29, corrugated hose; 31, piston plate; 32, third belt; 33, third pulley; 34, slide groove; 35, slide plate; 36, torsion spring; 37, one-way bearing; 38, rotating shaft. DETAILED DESCRIPTION

[0031] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Please see attached Figure 1 -Attached Figure 7 A sewage detection sampling device comprises a floating plate 1, a circular through groove is formed on the top of the floating plate 1, and further comprises: a U-shaped frame 2, a pumping assembly, a drainage assembly and a driving assembly, the U-shaped frame 2 is fixedly mounted on the top of the floating plate 1, the pumping assembly is arranged on the horizontal side of the U-shaped frame 2, and the pumping assembly is used to extract sewage of different depths, the drainage assembly is arranged on the horizontal side of the U-shaped frame 2, the drainage assembly is also connected to the pumping assembly, and the drainage assembly is used to discharge the water extracted by the pumping assembly, the driving assembly is arranged on the horizontal side of the U-shaped frame 2, and the driving assembly is used to drive the pumping assembly and the drainage assembly to work;

[0034] As described above, by configuring the pumping assembly, the drainage assembly and the driving assembly, cross contamination between two adjacent samplings will not occur, thereby improving the sampling accuracy of the device.

[0035] Please see attached Figure 1 -Attached Figure 5In a preferred embodiment, the pumping assembly includes: a sampling box 5, the sampling box 5 is fixedly installed on the top of the horizontal side of the U-shaped frame 2, and a piston plate 31 is slidably arranged inside the sampling box 5, a pumping pipe 26 is vertically installed at the bottom of the horizontal side of the U-shaped frame 2, the pumping pipe 26 is connected to the sampling box 5, and a first one-way valve is installed on the top of the surface of the pumping pipe 26, a sleeve 27 is slidably sleeved on the surface of the pumping pipe 26, and the bottom of the sleeve 27 is open, and a sleeve plate is fixedly sleeved on the surface of the sleeve 27, a second spring rod 28 is vertically fixedly installed at the bottom of the horizontal side of the U-shaped frame 2, and the telescopic end of the second spring rod 28 is fixedly installed on the top of the sleeve plate, a roller 11 is vertically rotatably installed at the bottom of the horizontal side of the U-shaped frame 2, and an arc groove 23 and a straight groove 24 are opened on the surface of the roller 11, and the arc groove 23 and the straight groove 24 are connected end to end, a sliding rod 25 is horizontally fixedly installed on the surface of the sleeve 27, and the end of the sliding rod 25 is slidably installed inside the arc groove 23 and the straight groove 24;

[0036] Specifically, when the slide bar 25 moves to the connection point between the end of the arc groove 23 and the straight groove 24 , the elastic force generated by the second spring rod 28 causes the slide bar 25 to drive the sleeve 27 to return to its original position.

[0037] Please see attached Figure 1 -Attached Figure 7 In a preferred embodiment, the drainage component includes: a corrugated hose 29, the corrugated hose 29 is installed at the bottom of the horizontal side of the U-shaped frame 2, and the corrugated hose 29 is connected to the sampling box 5, the end of the corrugated hose 29 is connected and installed with a water outlet 6, the end of the water outlet 6 is installed with a second one-way valve, and the surface of the water outlet 6 is fixedly sleeved with a slide 35, a slide groove 34 is provided at the bottom of the horizontal side of the U-shaped frame 2, and the top of the slide 35 is slidably installed inside the slide groove 34, a folding rod 7 is fixedly installed on the side of the slide 35, and the horizontal side of the folding rod 7 is located above the horizontal side of the U-shaped frame 2, a column is rotatably installed on the top of the floating plate 1, and a turntable 3 is fixedly installed on the top of the column, four placement grooves evenly distributed in an annular shape are provided on the top of the turntable 3, and a sampling tube 4 is placed inside each placement groove, and a third pulley 33 is fixedly installed on the surface of the column and the bottom of the roller 11, and the surfaces of the two third pulleys 33 are sleeved with third belts 32;

[0038] Furthermore, the drainage is divided into two times, and the water outlet head 6 is moved during the two drainages to achieve drainage at different positions during the two drainages.

[0039] Please see attached Figure 1 -Attached Figure 7In a preferred embodiment, the driving assembly includes: a rotating shaft 38, which is vertically rotatably installed on the top of the horizontal side of the U-shaped frame 2, and the bottom of the rotating shaft 38 is fixedly installed at the top center of the roller 11 through a connecting shaft, and a large gear 20 is fixedly sleeved on the surface of the rotating shaft 38, the large gear 20 is a missing gear, and the convex teeth on the large gear 20 are equally divided into four groups, a driving motor 10 is vertically installed on the top of the horizontal side of the U-shaped frame 2, and the top of the output shaft of the driving motor 10 and the top of the rotating shaft 38 are fixedly installed with a second pulley 22, and the surfaces of the two second pulleys 22 are sleeved with a second belt 21, a rotating rod 16 is vertically rotatably installed on the top of the horizontal side of the U-shaped frame 2, a one-way bearing 37 is fixedly sleeved on the surface of the rotating rod 16, a small gear 19 and a ring 17 are rotatably sleeved on the surface of the rotating rod 16, and the end of the ring 17 is fixedly installed on the top of the small gear 19, and the small gear 19 is fixedly sleeved on the surface of the small gear 19. 19 and the large gear 20 are meshed with each other, a first spring rod 18 is fixedly installed horizontally on the surface of the collar 17, a circular groove adapted to the one-way bearing 37 is opened at the bottom of the small gear 19, the outer ring of the one-way bearing 37 is fixedly installed on the inner wall of the circular groove, a torsion spring 36 is sleeved on the surface of the rotating rod 16, and the two ends of the torsion spring 36 are respectively fixedly installed on the bottom of the small gear 19 and the top of the horizontal side of the U-shaped frame 2, a large pulley 15 is fixedly installed on the top of the rotating rod 16, a shaft rod 12 is rotatably installed on the side of the sampling box 5, and a small pulley 14 is fixedly installed at the end of the shaft rod 12, and the first belt 13 is sleeved on the surface of the small pulley 14 and the large pulley 15, a reciprocating screw 8 is vertically fixedly installed on the top of the shaft rod 12, and an L-shaped plate 9 is sleeved on the surface of the reciprocating screw 8 through a thread, the vertical side of the L-shaped plate 9 passes through the horizontal side of the sampling box 5, and the end of the vertical side of the L-shaped plate 9 is fixedly installed on the top of the piston plate 31;

[0040] Preferably, when the height of the sleeve 27 is switched, the position of the water outlet head 6 can be automatically changed so that the water will not enter the sampling tube 4 during the first drainage at the designated position, and the water outlet head 6 automatically moves to the top of the sampling tube 4 before the second drainage to achieve accurate sampling of the sewage.

[0041] The working principle of the present invention is as follows: when it is necessary to sample sewage in a river, firstly, the floating plate 1 is placed in the river;

[0042] Then, the driving motor 10 is started to drive the second belt 21 and the second pulley 22 to rotate positively by ninety degrees. The rotation of the second pulley 22 drives the rotating shaft 38 to rotate. The rotation of the rotating shaft 38 drives the large gear 20 and the roller 11 to rotate ninety degrees. The rotation of the roller 11 drives the arc groove 23, the straight groove 24, the third pulley 33 and the third belt 32 to rotate positively by ninety degrees. When the arc groove 23 and the straight groove 24 rotate, they drive the slide bar 25 to move downward by a specified distance. The downward movement of the slide bar 25 drives the sleeve 27 to move downward and causes the second spring rod 28 to generate tension, so that the water pumping pipe 26 can be sampled at different depths through the sleeve 27.

[0043] The third pulley 33 rotates to drive the column to rotate, the column rotates to drive the turntable 3 to rotate, and the turntable 3 rotates to drive the four sampling cylinders 4 to rotate, so that sewage of different depths can be stored in different sampling cylinders 4;

[0044] Since the large gear 20 is a missing gear, when each set of convex teeth on the large gear 20 contacts the small gear 19, it will drive the small gear 19 to rotate two circles. After the large gear 20 rotates ninety degrees, the small gear 19 will be located between two adjacent sets of convex teeth, and will no longer mesh with the large gear 20 at this time. When the small gear 19 rotates two circles in the positive direction, the torsion spring 36 will generate torque, and when the small gear 19 rotates in the positive direction, it will not drive the rotating rod 16 to rotate through the one-way bearing 37. It should be noted that when the pinion 19 rotates in the positive direction, it will drive the collar 17 and the first spring rod 18 to rotate two circles in the positive direction. When the first spring rod 18 revolves in the positive direction, it will push the folding rod 7 to move in the direction close to the sampling box 5, so that the water outlet 6 is not located above the sampling tube 4. When the folding rod 7 moves to the end, the telescopic end of the first spring rod 18 will be telescopic to achieve passing over the folding rod 7.

[0045] When the small gear 19 is not in contact with the convex teeth on the large gear 20, the torsion force generated by the torsion spring 36 will cause the small gear 19 to rotate two circles in the opposite direction. The small gear 19 rotates two circles in the opposite direction, which will drive the rotating rod 16, the collar 17, and the first spring rod 18 to rotate two circles through the one-way bearing 37. The rotating rod 16 rotates two circles in the opposite direction, which will drive the large pulley 15 to rotate two circles. The large pulley 15 accelerates the small pulley 14 to rotate through the first belt 13. The rotation of the small pulley 14 drives the reciprocating screw 8 to rotate through the shaft 12. The reciprocating screw 8 The rotation drives the L-shaped plate 9 to move up and down, and the L-shaped plate 9 moves up and down and drives the piston plate 31 to move up and down. When the piston plate 31 moves upward, the first one-way valve on the water pumping pipe 26 opens, and the second one-way valve on the water outlet head 6 closes, and the sewage enters the sampling box 5 through the sleeve 27 and the water pumping pipe 26. When the piston plate 31 moves downward, the first one-way valve on the water pumping pipe 26 closes, and the second one-way valve on the water outlet head 6 opens, and the sewage inside the sampling box 5 is discharged through the corrugated soft pass and the water outlet head 6.

[0046] When the first spring rod 18, the sleeve 27, the large pulley 15 and the rotating rod 16 rotate the first circle, the first spring rod 18 will contact the folding rod 7 and push the folding rod 7 to move at the end of the first circle in the opposite direction, and the movement of the folding rod 7 drives the slide plate 35 to move, and the movement of the slide plate 35 drives the water outlet head 6 to move above the sampling tube 4. The rotation of the large pulley 15 will accelerate the rotation of the reciprocating screw 8, and the L-shaped plate 9 has been moved up and down once. In summary, the L-shaped plate 9 can be moved once to draw sewage of the depth to clean the sleeve 27, the water pumping pipe 26, the sampling box 5, the corrugated hose 29 and the water outlet head 6 once, and the sewage discharged at this time will drip into the river;

[0047] When the first spring rod 18, the sleeve 27, the large pulley 15 and the rotating rod 16 rotate the second circle, in summary, the L-shaped plate 9 still drives the piston plate 31 to move up and down once, and further the sleeve 27, the water pumping pipe 26, the sampling box 5, the corrugated hose 29 and the water outlet head 6 cleaned by the deep sewage can be sampled, ensuring that there is no cross infection between two adjacent samplings;

[0048] In summary, by reciprocating in sequence, before sampling, the casing 27, the suction pipe 26, the sampling box 5, the corrugated hose 29 and the water outlet head 6 can be cleaned once with the sewage at the depth and then sampling can be performed, thereby ensuring the effect and accuracy of the sewage sampling and thus improving the use effect of the equipment.

[0049] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A sewage detection sampling device, comprising a floating plate (1), wherein a circular through groove is formed on the top of the floating plate (1), characterized in that: Also includes: A U-shaped frame (2), wherein the U-shaped frame (2) is fixedly mounted on the top of the floating plate (1); A pumping assembly, the pumping assembly being arranged on a horizontal side of the U-shaped frame (2), and being used to pump sewage at different depths; A drainage component, the drainage component is arranged on the horizontal side of the U-shaped frame (2), the drainage component is also connected to the pumping component, and the drainage component is used to discharge water pumped by the pumping component; A driving assembly, the driving assembly is arranged on the horizontal side of the U-shaped frame (2), and the driving assembly is used to drive the pumping assembly and the drainage assembly to work; The pumping assembly comprises: a sampling box (5), the sampling box (5) being fixedly mounted on the top of the horizontal side of the U-shaped frame (2), and a piston plate (31) being slidably arranged inside the sampling box (5), a pumping pipe (26) being vertically mounted on the bottom of the horizontal side of the U-shaped frame (2), the pumping pipe (26) being connected to the sampling box (5), and a first non-return valve being mounted on the top of the surface of the pumping pipe (26), a sleeve (27) being slidably sleeved on the surface of the pumping pipe (26), and the bottom of the sleeve (27) being open, and a sleeve plate being fixedly sleeved on the surface of the sleeve (27), a second spring rod (28) being vertically fixedly mounted on the bottom of the horizontal side of the U-shaped frame (2), and the telescopic end of the second spring rod (28) being fixedly mounted on the top of the sleeve plate, a roller (11) being vertically rotatably mounted on the bottom of the horizontal side of the U-shaped frame (2), and an arc groove (23) and a straight groove (24) being provided on the surface of the roller (11), and the arc groove (23) and the straight groove (24) being provided on the surface of the roller (11). The arc groove (23) and the straight groove (24) are connected end to end, a sliding rod (25) is fixedly installed horizontally on the surface of the sleeve (27), and the end of the sliding rod (25) is slidably installed inside the arc groove (23) and the straight groove (24), and the drainage component comprises: a corrugated hose (29), the corrugated hose (29) is installed at the bottom of the horizontal side of the U-shaped frame (2), and the corrugated hose (29) is connected to the sampling box (5), and a water outlet head (6) is installed at the end of the corrugated hose (29), a second one-way valve is installed at the end of the water outlet head (6), and a slide plate (35) is fixedly sleeved on the surface of the water outlet head (6), a sliding groove (34) is opened at the bottom of the horizontal side of the U-shaped frame (2), and the top of the slide plate (35) is slidably installed inside the sliding groove (34), and a folding rod (7) is fixedly installed on the side of the slide plate (35), and the horizontal side of the folding rod (7) is located above the horizontal side of the U-shaped frame (2).

2. A sewage detection sampling device according to claim 1, characterized in that: A column is rotatably mounted on the top of the floating plate (1), and a turntable (3) is fixedly mounted on the top of the column. Four placement grooves evenly distributed in an annular shape are opened on the top of the turntable (3), and a sampling tube (4) is placed inside each placement groove. A third pulley (33) is fixedly mounted on the surface of the column and the bottom of the roller (11), and a third belt (32) is sleeved on the surfaces of the two third pulleys (33).

3. A sewage detection sampling device according to claim 2, characterized in that: The driving assembly comprises: a rotating shaft (38), the rotating shaft (38) being vertically rotatably mounted on the top of the horizontal side of the U-shaped frame (2), the bottom of the rotating shaft (38) being fixedly mounted on the top center of the roller (11) via a connecting shaft, and a large gear (20) being fixedly sleeved on the surface of the rotating shaft (38), the large gear (20) being a missing gear, and the convex teeth on the large gear (20) being equally divided into four groups, a driving motor (10) being vertically mounted on the top of the horizontal side of the U-shaped frame (2), and second pulleys (22) being fixedly mounted on the top of the output shaft of the driving motor (10) and the top of the rotating shaft (38), and second belts (21) being sleeved on the surfaces of the two second belt pulleys (22).

4. A sewage detection sampling device according to claim 3, characterized in that: A rotating rod (16) is vertically rotatably mounted on the top of the horizontal side of the U-shaped frame (2); a one-way bearing (37) is fixedly sleeved on the surface of the rotating rod (16); a small gear (19) and a collar (17) are rotatably sleeved on the surface of the rotating rod (16); the end of the collar (17) is fixedly mounted on the top of the small gear (19), and the small gear (19) and the large gear (20) are meshed with each other; and a first spring rod (18) is horizontally fixedly mounted on the surface of the collar (17).

5. A sewage detection sampling device according to claim 4, characterized in that: A circular groove matching the one-way bearing (37) is formed at the bottom of the pinion gear (19), and the outer ring of the one-way bearing (37) is fixedly mounted on the inner wall of the circular groove. A torsion spring (36) is sleeved on the surface of the rotating rod (16), and two ends of the torsion spring (36) are respectively fixedly mounted on the bottom of the pinion gear (19) and the top of the horizontal side of the U-shaped frame (2).

6. A sewage detection sampling device according to claim 5, characterized in that: A large pulley (15) is fixedly mounted on the top of the rotating rod (16), a shaft (12) is rotatably mounted on the side of the sampling box (5), and a small pulley (14) is fixedly mounted on the end of the shaft (12), and a first belt (13) is sleeved on the surfaces of the small pulley (14) and the large pulley (15).

7. A sewage detection sampling device according to claim 6, characterized in that: A reciprocating screw (8) is vertically fixedly mounted on the top of the shaft (12), an L-shaped plate (9) is threadedly sleeved on the surface of the reciprocating screw (8), the vertical side of the L-shaped plate (9) passes through the horizontal side of the sampling box (5), and the end of the vertical side of the L-shaped plate (9) is fixedly mounted on the top of the piston plate (31).

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